libcli/smb/smbXcli_base.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Infrastructure for async SMB client requests
   4    Copyright (C) Volker Lendecke 2008
   5    Copyright (C) Stefan Metzmacher 2011
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/network.h"
  23 #include "../lib/async_req/async_sock.h"
  24 #include "../lib/util/tevent_ntstatus.h"
  25 #include "../lib/util/tevent_unix.h"
  26 #include "lib/util/util_net.h"
  27 #include "lib/util/dlinklist.h"
  28 #include "lib/util/iov_buf.h"
  29 #include "../libcli/smb/smb_common.h"
  30 #include "../libcli/smb/smb_seal.h"
  31 #include "../libcli/smb/smb_signing.h"
  32 #include "../libcli/smb/read_smb.h"
  33 #include "smbXcli_base.h"
  34 #include "librpc/ndr/libndr.h"
  35 #include "libcli/smb/smb2_negotiate_context.h"
  36 #include "lib/crypto/sha512.h"
  37 #include "lib/crypto/aes.h"
  38 #include "lib/crypto/aes_ccm_128.h"
  39 #include "lib/crypto/aes_gcm_128.h"
  40
  41 struct smbXcli_conn;
  42 struct smbXcli_req;
  43 struct smbXcli_session;
  44 struct smbXcli_tcon;
  45
  46 struct smbXcli_conn {
  47         int sock_fd;
  48         struct sockaddr_storage local_ss;
  49         struct sockaddr_storage remote_ss;
  50         const char *remote_name;
  51
  52         struct tevent_queue *outgoing;
  53         struct tevent_req **pending;
  54         struct tevent_req *read_smb_req;
  55         struct tevent_req *suicide_req;
  56
  57         enum protocol_types min_protocol;
  58         enum protocol_types max_protocol;
  59         enum protocol_types protocol;
  60         bool allow_signing;
  61         bool desire_signing;
  62         bool mandatory_signing;
  63
  64         /*
  65          * The incoming dispatch function should return:
  66          * - NT_STATUS_RETRY, if more incoming PDUs are expected.
  67          * - NT_STATUS_OK, if no more processing is desired, e.g.
  68          *                 the dispatch function called
  69          *                 tevent_req_done().
  70          * - All other return values disconnect the connection.
  71          */
  72         NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
  73                                       TALLOC_CTX *tmp_mem,
  74                                       uint8_t *inbuf);
  75
  76         struct {
  77                 struct {
  78                         uint32_t capabilities;
  79                         uint32_t max_xmit;
  80                 } client;
  81
  82                 struct {
  83                         uint32_t capabilities;
  84                         uint32_t max_xmit;
  85                         uint16_t max_mux;
  86                         uint16_t security_mode;
  87                         bool readbraw;
  88                         bool writebraw;
  89                         bool lockread;
  90                         bool writeunlock;
  91                         uint32_t session_key;
  92                         struct GUID guid;
  93                         DATA_BLOB gss_blob;
  94                         uint8_t challenge[8];
  95                         const char *workgroup;
  96                         const char *name;
  97                         int time_zone;
  98                         NTTIME system_time;
  99                 } server;
 100
 101                 uint32_t capabilities;
 102                 uint32_t max_xmit;
 103
 104                 uint16_t mid;
 105
 106                 struct smb_signing_state *signing;
 107                 struct smb_trans_enc_state *trans_enc;
 108
 109                 struct tevent_req *read_braw_req;
 110         } smb1;
 111
 112         struct {
 113                 struct {
 114                         uint32_t capabilities;
 115                         uint16_t security_mode;
 116                         struct GUID guid;
 117                 } client;
 118
 119                 struct {
 120                         uint32_t capabilities;
 121                         uint16_t security_mode;
 122                         struct GUID guid;
 123                         uint32_t max_trans_size;
 124                         uint32_t max_read_size;
 125                         uint32_t max_write_size;
 126                         NTTIME system_time;
 127                         NTTIME start_time;
 128                         DATA_BLOB gss_blob;
 129                         uint16_t cipher;
 130                 } server;
 131
 132                 uint64_t mid;
 133                 uint16_t cur_credits;
 134                 uint16_t max_credits;
 135
 136                 uint32_t cc_chunk_len;
 137                 uint32_t cc_max_chunks;
 138
 139                 uint8_t io_priority;
 140
 141                 uint8_t preauth_sha512[64];
 142         } smb2;
 143
 144         struct smbXcli_session *sessions;
 145 };
 146
 147 struct smb2cli_session {
 148         uint64_t session_id;
 149         uint16_t session_flags;
 150         DATA_BLOB application_key;
 151         DATA_BLOB signing_key;
 152         bool should_sign;
 153         bool should_encrypt;
 154         DATA_BLOB encryption_key;
 155         DATA_BLOB decryption_key;
 156         uint64_t nonce_high_random;
 157         uint64_t nonce_high_max;
 158         uint64_t nonce_high;
 159         uint64_t nonce_low;
 160         uint16_t channel_sequence;
 161         bool replay_active;
 162 };
 163
 164 struct smbXcli_session {
 165         struct smbXcli_session *prev, *next;
 166         struct smbXcli_conn *conn;
 167
 168         struct {
 169                 uint16_t session_id;
 170                 uint16_t action;
 171                 DATA_BLOB application_key;
 172                 bool protected_key;
 173         } smb1;
 174
 175         struct smb2cli_session *smb2;
 176
 177         struct {
 178                 DATA_BLOB signing_key;
 179                 uint8_t preauth_sha512[64];
 180         } smb2_channel;
 181
 182         /*
 183          * this should be a short term hack
 184          * until the upper layers have implemented
 185          * re-authentication.
 186          */
 187         bool disconnect_expired;
 188 };
 189
 190 struct smbXcli_tcon {
 191         bool is_smb1;
 192         uint32_t fs_attributes;
 193
 194         struct {
 195                 uint16_t tcon_id;
 196                 uint16_t optional_support;
 197                 uint32_t maximal_access;
 198                 uint32_t guest_maximal_access;
 199                 char *service;
 200                 char *fs_type;
 201         } smb1;
 202
 203         struct {
 204                 uint32_t tcon_id;
 205                 uint8_t type;
 206                 uint32_t flags;
 207                 uint32_t capabilities;
 208                 uint32_t maximal_access;
 209                 bool should_sign;
 210                 bool should_encrypt;
 211         } smb2;
 212 };
 213
 214 struct smbXcli_req_state {
 215         struct tevent_context *ev;
 216         struct smbXcli_conn *conn;
 217         struct smbXcli_session *session; /* maybe NULL */
 218         struct smbXcli_tcon *tcon; /* maybe NULL */
 219
 220         uint8_t length_hdr[4];
 221
 222         bool one_way;
 223
 224         uint8_t *inbuf;
 225
 226         struct tevent_req *write_req;
 227
 228         struct {
 229                 /* Space for the header including the wct */
 230                 uint8_t hdr[HDR_VWV];
 231
 232                 /*
 233                  * For normal requests, smb1cli_req_send chooses a mid.
 234                  * SecondaryV trans requests need to use the mid of the primary
 235                  * request, so we need a place to store it.
 236                  * Assume it is set if != 0.
 237                  */
 238                 uint16_t mid;
 239
 240                 uint16_t *vwv;
 241                 uint8_t bytecount_buf[2];
 242
 243 #define MAX_SMB_IOV 10
 244                 /* length_hdr, hdr, words, byte_count, buffers */
 245                 struct iovec iov[1 + 3 + MAX_SMB_IOV];
 246                 int iov_count;
 247
 248                 bool one_way_seqnum;
 249                 uint32_t seqnum;
 250                 struct tevent_req **chained_requests;
 251
 252                 uint8_t recv_cmd;
 253                 NTSTATUS recv_status;
 254                 /* always an array of 3 talloc elements */
 255                 struct iovec *recv_iov;
 256         } smb1;
 257
 258         struct {
 259                 const uint8_t *fixed;
 260                 uint16_t fixed_len;
 261                 const uint8_t *dyn;
 262                 uint32_t dyn_len;
 263
 264                 uint8_t transform[SMB2_TF_HDR_SIZE];
 265                 uint8_t hdr[SMB2_HDR_BODY];
 266                 uint8_t pad[7]; /* padding space for compounding */
 267
 268                 /*
 269                  * always an array of 3 talloc elements
 270                  * (without a SMB2_TRANSFORM header!)
 271                  *
 272                  * HDR, BODY, DYN
 273                  */
 274                 struct iovec *recv_iov;
 275
 276                 /*
 277                  * the expected max for the response dyn_len
 278                  */
 279                 uint32_t max_dyn_len;
 280
 281                 uint16_t credit_charge;
 282
 283                 bool should_sign;
 284                 bool should_encrypt;
 285                 uint64_t encryption_session_id;
 286
 287                 bool signing_skipped;
 288                 bool notify_async;
 289                 bool got_async;
 290                 uint16_t cancel_flags;
 291                 uint64_t cancel_mid;
 292                 uint64_t cancel_aid;
 293         } smb2;
 294 };
 295
 296 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
 297 {
 298         /*
 299          * NT_STATUS_OK, means we do not notify the callers
 300          */
 301         smbXcli_conn_disconnect(conn, NT_STATUS_OK);
 302
 303         while (conn->sessions) {
 304                 conn->sessions->conn = NULL;
 305                 DLIST_REMOVE(conn->sessions, conn->sessions);
 306         }
 307
 308         if (conn->smb1.trans_enc) {
 309                 TALLOC_FREE(conn->smb1.trans_enc);
 310         }
 311
 312         return 0;
 313 }
 314
 315 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
 316                                          int fd,
 317                                          const char *remote_name,
 318                                          enum smb_signing_setting signing_state,
 319                                          uint32_t smb1_capabilities,
 320                                          struct GUID *client_guid,
 321                                          uint32_t smb2_capabilities)
 322 {
 323         struct smbXcli_conn *conn = NULL;
 324         void *ss = NULL;
 325         struct sockaddr *sa = NULL;
 326         socklen_t sa_length;
 327         int ret;
 328
 329         conn = talloc_zero(mem_ctx, struct smbXcli_conn);
 330         if (!conn) {
 331                 return NULL;
 332         }
 333
 334         conn->sock_fd = fd;
 335
 336         conn->remote_name = talloc_strdup(conn, remote_name);
 337         if (conn->remote_name == NULL) {
 338                 goto error;
 339         }
 340
 341         ss = (void *)&conn->local_ss;
 342         sa = (struct sockaddr *)ss;
 343         sa_length = sizeof(conn->local_ss);
 344         ret = getsockname(fd, sa, &sa_length);
 345         if (ret == -1) {
 346                 goto error;
 347         }
 348         ss = (void *)&conn->remote_ss;
 349         sa = (struct sockaddr *)ss;
 350         sa_length = sizeof(conn->remote_ss);
 351         ret = getpeername(fd, sa, &sa_length);
 352         if (ret == -1) {
 353                 goto error;
 354         }
 355
 356         conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
 357         if (conn->outgoing == NULL) {
 358                 goto error;
 359         }
 360         conn->pending = NULL;
 361
 362         conn->min_protocol = PROTOCOL_NONE;
 363         conn->max_protocol = PROTOCOL_NONE;
 364         conn->protocol = PROTOCOL_NONE;
 365
 366         switch (signing_state) {
 367         case SMB_SIGNING_OFF:
 368                 /* never */
 369                 conn->allow_signing = false;
 370                 conn->desire_signing = false;
 371                 conn->mandatory_signing = false;
 372                 break;
 373         case SMB_SIGNING_DEFAULT:
 374         case SMB_SIGNING_IF_REQUIRED:
 375                 /* if the server requires it */
 376                 conn->allow_signing = true;
 377                 conn->desire_signing = false;
 378                 conn->mandatory_signing = false;
 379                 break;
 380         case SMB_SIGNING_DESIRED:
 381                 /* if the server desires it */
 382                 conn->allow_signing = true;
 383                 conn->desire_signing = true;
 384                 conn->mandatory_signing = false;
 385                 break;
 386         case SMB_SIGNING_IPC_DEFAULT:
 387         case SMB_SIGNING_REQUIRED:
 388                 /* always */
 389                 conn->allow_signing = true;
 390                 conn->desire_signing = true;
 391                 conn->mandatory_signing = true;
 392                 break;
 393         }
 394
 395         conn->smb1.client.capabilities = smb1_capabilities;
 396         conn->smb1.client.max_xmit = UINT16_MAX;
 397
 398         conn->smb1.capabilities = conn->smb1.client.capabilities;
 399         conn->smb1.max_xmit = 1024;
 400
 401         conn->smb1.mid = 1;
 402
 403         /* initialise signing */
 404         conn->smb1.signing = smb_signing_init(conn,
 405                                               conn->allow_signing,
 406                                               conn->desire_signing,
 407                                               conn->mandatory_signing);
 408         if (!conn->smb1.signing) {
 409                 goto error;
 410         }
 411
 412         conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
 413         if (conn->mandatory_signing) {
 414                 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
 415         }
 416         if (client_guid) {
 417                 conn->smb2.client.guid = *client_guid;
 418         }
 419         conn->smb2.client.capabilities = smb2_capabilities;
 420
 421         conn->smb2.cur_credits = 1;
 422         conn->smb2.max_credits = 0;
 423         conn->smb2.io_priority = 1;
 424
 425         /*
 426          * Samba and Windows servers accept a maximum of 16 MiB with a maximum
 427          * chunk length of 1 MiB.
 428          */
 429         conn->smb2.cc_chunk_len = 1024 * 1024;
 430         conn->smb2.cc_max_chunks = 16;
 431
 432         talloc_set_destructor(conn, smbXcli_conn_destructor);
 433         return conn;
 434
 435  error:
 436         TALLOC_FREE(conn);
 437         return NULL;
 438 }
 439
 440 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
 441 {
 442         if (conn == NULL) {
 443                 return false;
 444         }
 445
 446         if (conn->sock_fd == -1) {
 447                 return false;
 448         }
 449
 450         return true;
 451 }
 452
 453 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
 454 {
 455         return conn->protocol;
 456 }
 457
 458 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
 459 {
 460         if (conn->protocol >= PROTOCOL_SMB2_02) {
 461                 return true;
 462         }
 463
 464         if (conn->smb1.capabilities & CAP_UNICODE) {
 465                 return true;
 466         }
 467
 468         return false;
 469 }
 470
 471 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
 472 {
 473         set_socket_options(conn->sock_fd, options);
 474 }
 475
 476 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
 477 {
 478         return &conn->local_ss;
 479 }
 480
 481 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
 482 {
 483         return &conn->remote_ss;
 484 }
 485
 486 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
 487 {
 488         return conn->remote_name;
 489 }
 490
 491 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
 492 {
 493         if (conn->protocol >= PROTOCOL_SMB2_02) {
 494                 /*
 495                  * TODO...
 496                  */
 497                 return 1;
 498         }
 499
 500         return conn->smb1.server.max_mux;
 501 }
 502
 503 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
 504 {
 505         if (conn->protocol >= PROTOCOL_SMB2_02) {
 506                 return conn->smb2.server.system_time;
 507         }
 508
 509         return conn->smb1.server.system_time;
 510 }
 511
 512 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
 513 {
 514         if (conn->protocol >= PROTOCOL_SMB2_02) {
 515                 return &conn->smb2.server.gss_blob;
 516         }
 517
 518         return &conn->smb1.server.gss_blob;
 519 }
 520
 521 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
 522 {
 523         if (conn->protocol >= PROTOCOL_SMB2_02) {
 524                 return &conn->smb2.server.guid;
 525         }
 526
 527         return &conn->smb1.server.guid;
 528 }
 529
 530 struct smbXcli_conn_samba_suicide_state {
 531         struct smbXcli_conn *conn;
 532         struct iovec iov;
 533         uint8_t buf[9];
 534         struct tevent_req *write_req;
 535 };
 536
 537 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
 538                                                enum tevent_req_state req_state);
 539 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
 540
 541 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
 542                                                    struct tevent_context *ev,
 543                                                    struct smbXcli_conn *conn,
 544                                                    uint8_t exitcode)
 545 {
 546         struct tevent_req *req, *subreq;
 547         struct smbXcli_conn_samba_suicide_state *state;
 548
 549         req = tevent_req_create(mem_ctx, &state,
 550                                 struct smbXcli_conn_samba_suicide_state);
 551         if (req == NULL) {
 552                 return NULL;
 553         }
 554         state->conn = conn;
 555         SIVAL(state->buf, 4, 0x74697865);
 556         SCVAL(state->buf, 8, exitcode);
 557         _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
 558
 559         if (conn->suicide_req != NULL) {
 560                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 561                 return tevent_req_post(req, ev);
 562         }
 563
 564         state->iov.iov_base = state->buf;
 565         state->iov.iov_len = sizeof(state->buf);
 566
 567         subreq = writev_send(state, ev, conn->outgoing, conn->sock_fd,
 568                              false, &state->iov, 1);
 569         if (tevent_req_nomem(subreq, req)) {
 570                 return tevent_req_post(req, ev);
 571         }
 572         tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
 573         state->write_req = subreq;
 574
 575         tevent_req_set_cleanup_fn(req, smbXcli_conn_samba_suicide_cleanup);
 576
 577         /*
 578          * We need to use tevent_req_defer_callback()
 579          * in order to allow smbXcli_conn_disconnect()
 580          * to do a safe cleanup.
 581          */
 582         tevent_req_defer_callback(req, ev);
 583         conn->suicide_req = req;
 584
 585         return req;
 586 }
 587
 588 static void smbXcli_conn_samba_suicide_cleanup(struct tevent_req *req,
 589                                                enum tevent_req_state req_state)
 590 {
 591         struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
 592                 req, struct smbXcli_conn_samba_suicide_state);
 593
 594         TALLOC_FREE(state->write_req);
 595
 596         if (state->conn == NULL) {
 597                 return;
 598         }
 599
 600         if (state->conn->suicide_req == req) {
 601                 state->conn->suicide_req = NULL;
 602         }
 603         state->conn = NULL;
 604 }
 605
 606 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
 607 {
 608         struct tevent_req *req = tevent_req_callback_data(
 609                 subreq, struct tevent_req);
 610         struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
 611                 req, struct smbXcli_conn_samba_suicide_state);
 612         ssize_t nwritten;
 613         int err;
 614
 615         state->write_req = NULL;
 616
 617         nwritten = writev_recv(subreq, &err);
 618         TALLOC_FREE(subreq);
 619         if (nwritten == -1) {
 620                 /* here, we need to notify all pending requests */
 621                 NTSTATUS status = map_nt_error_from_unix_common(err);
 622                 smbXcli_conn_disconnect(state->conn, status);
 623                 return;
 624         }
 625         tevent_req_done(req);
 626 }
 627
 628 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
 629 {
 630         return tevent_req_simple_recv_ntstatus(req);
 631 }
 632
 633 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
 634                                     uint8_t exitcode)
 635 {
 636         TALLOC_CTX *frame = talloc_stackframe();
 637         struct tevent_context *ev;
 638         struct tevent_req *req;
 639         NTSTATUS status = NT_STATUS_NO_MEMORY;
 640         bool ok;
 641
 642         if (smbXcli_conn_has_async_calls(conn)) {
 643                 /*
 644                  * Can't use sync call while an async call is in flight
 645                  */
 646                 status = NT_STATUS_INVALID_PARAMETER_MIX;
 647                 goto fail;
 648         }
 649         ev = samba_tevent_context_init(frame);
 650         if (ev == NULL) {
 651                 goto fail;
 652         }
 653         req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
 654         if (req == NULL) {
 655                 goto fail;
 656         }
 657         ok = tevent_req_poll_ntstatus(req, ev, &status);
 658         if (!ok) {
 659                 goto fail;
 660         }
 661         status = smbXcli_conn_samba_suicide_recv(req);
 662  fail:
 663         TALLOC_FREE(frame);
 664         return status;
 665 }
 666
 667 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
 668 {
 669         return conn->smb1.capabilities;
 670 }
 671
 672 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
 673 {
 674         return conn->smb1.max_xmit;
 675 }
 676
 677 bool smb1cli_conn_req_possible(struct smbXcli_conn *conn)
 678 {
 679         size_t pending = talloc_array_length(conn->pending);
 680         uint16_t possible = conn->smb1.server.max_mux;
 681
 682         if (pending >= possible) {
 683                 return false;
 684         }
 685
 686         return true;
 687 }
 688
 689 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
 690 {
 691         return conn->smb1.server.session_key;
 692 }
 693
 694 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
 695 {
 696         return conn->smb1.server.challenge;
 697 }
 698
 699 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
 700 {
 701         return conn->smb1.server.security_mode;
 702 }
 703
 704 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
 705 {
 706         return conn->smb1.server.readbraw;
 707 }
 708
 709 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
 710 {
 711         return conn->smb1.server.writebraw;
 712 }
 713
 714 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
 715 {
 716         return conn->smb1.server.lockread;
 717 }
 718
 719 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
 720 {
 721         return conn->smb1.server.writeunlock;
 722 }
 723
 724 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
 725 {
 726         return conn->smb1.server.time_zone;
 727 }
 728
 729 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
 730                                    const DATA_BLOB user_session_key,
 731                                    const DATA_BLOB response)
 732 {
 733         return smb_signing_activate(conn->smb1.signing,
 734                                     user_session_key,
 735                                     response);
 736 }
 737
 738 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
 739                                 const uint8_t *buf, uint32_t seqnum)
 740 {
 741         const uint8_t *hdr = buf + NBT_HDR_SIZE;
 742         size_t len = smb_len_nbt(buf);
 743
 744         return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
 745 }
 746
 747 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
 748 {
 749         return smb_signing_is_active(conn->smb1.signing);
 750 }
 751
 752 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
 753                                  struct smb_trans_enc_state *es)
 754 {
 755         /* Replace the old state, if any. */
 756         if (conn->smb1.trans_enc) {
 757                 TALLOC_FREE(conn->smb1.trans_enc);
 758         }
 759         conn->smb1.trans_enc = es;
 760 }
 761
 762 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
 763 {
 764         return common_encryption_on(conn->smb1.trans_enc);
 765 }
 766
 767
 768 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
 769 {
 770         uint32_t flags2 = SVAL(hdr, HDR_FLG2);
 771         NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
 772
 773         if (NT_STATUS_IS_OK(status)) {
 774                 return NT_STATUS_OK;
 775         }
 776
 777         if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
 778                 return status;
 779         }
 780
 781         return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
 782 }
 783
 784 /**
 785  * Is the SMB command able to hold an AND_X successor
 786  * @param[in] cmd       The SMB command in question
 787  * @retval Can we add a chained request after "cmd"?
 788  */
 789 bool smb1cli_is_andx_req(uint8_t cmd)
 790 {
 791         switch (cmd) {
 792         case SMBtconX:
 793         case SMBlockingX:
 794         case SMBopenX:
 795         case SMBreadX:
 796         case SMBwriteX:
 797         case SMBsesssetupX:
 798         case SMBulogoffX:
 799         case SMBntcreateX:
 800                 return true;
 801                 break;
 802         default:
 803                 break;
 804         }
 805
 806         return false;
 807 }
 808
 809 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
 810 {
 811         size_t num_pending = talloc_array_length(conn->pending);
 812         uint16_t result;
 813
 814         if (conn->protocol == PROTOCOL_NONE) {
 815                 /*
 816                  * This is what windows sends on the SMB1 Negprot request
 817                  * and some vendors reuse the SMB1 MID as SMB2 sequence number.
 818                  */
 819                 return 0;
 820         }
 821
 822         while (true) {
 823                 size_t i;
 824
 825                 result = conn->smb1.mid++;
 826                 if ((result == 0) || (result == 0xffff)) {
 827                         continue;
 828                 }
 829
 830                 for (i=0; i<num_pending; i++) {
 831                         if (result == smb1cli_req_mid(conn->pending[i])) {
 832                                 break;
 833                         }
 834                 }
 835
 836                 if (i == num_pending) {
 837                         return result;
 838                 }
 839         }
 840 }
 841
 842 void smbXcli_req_unset_pending(struct tevent_req *req)
 843 {
 844         struct smbXcli_req_state *state =
 845                 tevent_req_data(req,
 846                 struct smbXcli_req_state);
 847         struct smbXcli_conn *conn = state->conn;
 848         size_t num_pending = talloc_array_length(conn->pending);
 849         size_t i;
 850
 851         TALLOC_FREE(state->write_req);
 852
 853         if (state->smb1.mid != 0) {
 854                 /*
 855                  * This is a [nt]trans[2] request which waits
 856                  * for more than one reply.
 857                  */
 858                 return;
 859         }
 860
 861         tevent_req_set_cleanup_fn(req, NULL);
 862
 863         if (num_pending == 1) {
 864                 /*
 865                  * The pending read_smb tevent_req is a child of
 866                  * conn->pending. So if nothing is pending anymore, we need to
 867                  * delete the socket read fde.
 868                  */
 869                 TALLOC_FREE(conn->pending);
 870                 conn->read_smb_req = NULL;
 871                 return;
 872         }
 873
 874         for (i=0; i<num_pending; i++) {
 875                 if (req == conn->pending[i]) {
 876                         break;
 877                 }
 878         }
 879         if (i == num_pending) {
 880                 /*
 881                  * Something's seriously broken. Just returning here is the
 882                  * right thing nevertheless, the point of this routine is to
 883                  * remove ourselves from conn->pending.
 884                  */
 885                 return;
 886         }
 887
 888         /*
 889          * Remove ourselves from the conn->pending array
 890          */
 891         for (; i < (num_pending - 1); i++) {
 892                 conn->pending[i] = conn->pending[i+1];
 893         }
 894
 895         /*
 896          * No NULL check here, we're shrinking by sizeof(void *), and
 897          * talloc_realloc just adjusts the size for this.
 898          */
 899         conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
 900                                        num_pending - 1);
 901         return;
 902 }
 903
 904 static void smbXcli_req_cleanup(struct tevent_req *req,
 905                                 enum tevent_req_state req_state)
 906 {
 907         struct smbXcli_req_state *state =
 908                 tevent_req_data(req,
 909                 struct smbXcli_req_state);
 910
 911         TALLOC_FREE(state->write_req);
 912
 913         switch (req_state) {
 914         case TEVENT_REQ_RECEIVED:
 915                 /*
 916                  * Make sure we really remove it from
 917                  * the pending array on destruction.
 918                  */
 919                 state->smb1.mid = 0;
 920                 smbXcli_req_unset_pending(req);
 921                 return;
 922         default:
 923                 return;
 924         }
 925 }
 926
 927 static bool smb1cli_req_cancel(struct tevent_req *req);
 928 static bool smb2cli_req_cancel(struct tevent_req *req);
 929
 930 static bool smbXcli_req_cancel(struct tevent_req *req)
 931 {
 932         struct smbXcli_req_state *state =
 933                 tevent_req_data(req,
 934                 struct smbXcli_req_state);
 935
 936         if (!smbXcli_conn_is_connected(state->conn)) {
 937                 return false;
 938         }
 939
 940         if (state->conn->protocol == PROTOCOL_NONE) {
 941                 return false;
 942         }
 943
 944         if (state->conn->protocol >= PROTOCOL_SMB2_02) {
 945                 return smb2cli_req_cancel(req);
 946         }
 947
 948         return smb1cli_req_cancel(req);
 949 }
 950
 951 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
 952
 953 bool smbXcli_req_set_pending(struct tevent_req *req)
 954 {
 955         struct smbXcli_req_state *state =
 956                 tevent_req_data(req,
 957                 struct smbXcli_req_state);
 958         struct smbXcli_conn *conn;
 959         struct tevent_req **pending;
 960         size_t num_pending;
 961
 962         conn = state->conn;
 963
 964         if (!smbXcli_conn_is_connected(conn)) {
 965                 return false;
 966         }
 967
 968         num_pending = talloc_array_length(conn->pending);
 969
 970         pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
 971                                  num_pending+1);
 972         if (pending == NULL) {
 973                 return false;
 974         }
 975         pending[num_pending] = req;
 976         conn->pending = pending;
 977         tevent_req_set_cleanup_fn(req, smbXcli_req_cleanup);
 978         tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
 979
 980         if (!smbXcli_conn_receive_next(conn)) {
 981                 /*
 982                  * the caller should notify the current request
 983                  *
 984                  * And all other pending requests get notified
 985                  * by smbXcli_conn_disconnect().
 986                  */
 987                 smbXcli_req_unset_pending(req);
 988                 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
 989                 return false;
 990         }
 991
 992         return true;
 993 }
 994
 995 static void smbXcli_conn_received(struct tevent_req *subreq);
 996
 997 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
 998 {
 999         size_t num_pending = talloc_array_length(conn->pending);
1000         struct tevent_req *req;
1001         struct smbXcli_req_state *state;
1002
1003         if (conn->read_smb_req != NULL) {
1004                 return true;
1005         }
1006
1007         if (num_pending == 0) {
1008                 if (conn->smb2.mid < UINT64_MAX) {
1009                         /* no more pending requests, so we are done for now */
1010                         return true;
1011                 }
1012
1013                 /*
1014                  * If there are no more SMB2 requests possible,
1015                  * because we are out of message ids,
1016                  * we need to disconnect.
1017                  */
1018                 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
1019                 return true;
1020         }
1021
1022         req = conn->pending[0];
1023         state = tevent_req_data(req, struct smbXcli_req_state);
1024
1025         /*
1026          * We're the first ones, add the read_smb request that waits for the
1027          * answer from the server
1028          */
1029         conn->read_smb_req = read_smb_send(conn->pending,
1030                                            state->ev,
1031                                            conn->sock_fd);
1032         if (conn->read_smb_req == NULL) {
1033                 return false;
1034         }
1035         tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
1036         return true;
1037 }
1038
1039 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
1040 {
1041         struct smbXcli_session *session;
1042         int sock_fd = conn->sock_fd;
1043
1044         tevent_queue_stop(conn->outgoing);
1045
1046         conn->sock_fd = -1;
1047
1048         session = conn->sessions;
1049         if (talloc_array_length(conn->pending) == 0) {
1050                 /*
1051                  * if we do not have pending requests
1052                  * there is no need to update the channel_sequence
1053                  */
1054                 session = NULL;
1055         }
1056         for (; session; session = session->next) {
1057                 smb2cli_session_increment_channel_sequence(session);
1058         }
1059
1060         if (conn->suicide_req != NULL) {
1061                 /*
1062                  * smbXcli_conn_samba_suicide_send()
1063                  * used tevent_req_defer_callback() already.
1064                  */
1065                 if (!NT_STATUS_IS_OK(status)) {
1066                         tevent_req_nterror(conn->suicide_req, status);
1067                 }
1068                 conn->suicide_req = NULL;
1069         }
1070
1071         /*
1072          * Cancel all pending requests. We do not do a for-loop walking
1073          * conn->pending because that array changes in
1074          * smbXcli_req_unset_pending.
1075          */
1076         while (talloc_array_length(conn->pending) > 0) {
1077                 struct tevent_req *req;
1078                 struct smbXcli_req_state *state;
1079                 struct tevent_req **chain;
1080                 size_t num_chained;
1081                 size_t i;
1082
1083                 req = conn->pending[0];
1084                 state = tevent_req_data(req, struct smbXcli_req_state);
1085
1086                 if (state->smb1.chained_requests == NULL) {
1087                         /*
1088                          * We're dead. No point waiting for trans2
1089                          * replies.
1090                          */
1091                         state->smb1.mid = 0;
1092
1093                         smbXcli_req_unset_pending(req);
1094
1095                         if (NT_STATUS_IS_OK(status)) {
1096                                 /* do not notify the callers */
1097                                 continue;
1098                         }
1099
1100                         /*
1101                          * we need to defer the callback, because we may notify
1102                          * more then one caller.
1103                          */
1104                         tevent_req_defer_callback(req, state->ev);
1105                         tevent_req_nterror(req, status);
1106                         continue;
1107                 }
1108
1109                 chain = talloc_move(conn, &state->smb1.chained_requests);
1110                 num_chained = talloc_array_length(chain);
1111
1112                 for (i=0; i<num_chained; i++) {
1113                         req = chain[i];
1114                         state = tevent_req_data(req, struct smbXcli_req_state);
1115
1116                         /*
1117                          * We're dead. No point waiting for trans2
1118                          * replies.
1119                          */
1120                         state->smb1.mid = 0;
1121
1122                         smbXcli_req_unset_pending(req);
1123
1124                         if (NT_STATUS_IS_OK(status)) {
1125                                 /* do not notify the callers */
1126                                 continue;
1127                         }
1128
1129                         /*
1130                          * we need to defer the callback, because we may notify
1131                          * more than one caller.
1132                          */
1133                         tevent_req_defer_callback(req, state->ev);
1134                         tevent_req_nterror(req, status);
1135                 }
1136                 TALLOC_FREE(chain);
1137         }
1138
1139         if (sock_fd != -1) {
1140                 close(sock_fd);
1141         }
1142 }
1143
1144 /*
1145  * Fetch a smb request's mid. Only valid after the request has been sent by
1146  * smb1cli_req_send().
1147  */
1148 uint16_t smb1cli_req_mid(struct tevent_req *req)
1149 {
1150         struct smbXcli_req_state *state =
1151                 tevent_req_data(req,
1152                 struct smbXcli_req_state);
1153
1154         if (state->smb1.mid != 0) {
1155                 return state->smb1.mid;
1156         }
1157
1158         return SVAL(state->smb1.hdr, HDR_MID);
1159 }
1160
1161 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1162 {
1163         struct smbXcli_req_state *state =
1164                 tevent_req_data(req,
1165                 struct smbXcli_req_state);
1166
1167         state->smb1.mid = mid;
1168 }
1169
1170 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1171 {
1172         struct smbXcli_req_state *state =
1173                 tevent_req_data(req,
1174                 struct smbXcli_req_state);
1175
1176         return state->smb1.seqnum;
1177 }
1178
1179 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1180 {
1181         struct smbXcli_req_state *state =
1182                 tevent_req_data(req,
1183                 struct smbXcli_req_state);
1184
1185         state->smb1.seqnum = seqnum;
1186 }
1187
1188 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1189 {
1190         ssize_t ret = iov_buflen(iov, count);
1191
1192         /* Ignore the overflow case for now ... */
1193         return ret;
1194 }
1195
1196 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1197                                    const struct iovec *iov,
1198                                    int count)
1199 {
1200         ssize_t buflen;
1201         uint8_t *buf;
1202
1203         buflen = iov_buflen(iov, count);
1204         if (buflen == -1) {
1205                 return NULL;
1206         }
1207
1208         buf = talloc_array(mem_ctx, uint8_t, buflen);
1209         if (buf == NULL) {
1210                 return NULL;
1211         }
1212
1213         iov_buf(iov, count, buf, buflen);
1214
1215         return buf;
1216 }
1217
1218 static void smb1cli_req_flags(enum protocol_types protocol,
1219                               uint32_t smb1_capabilities,
1220                               uint8_t smb_command,
1221                               uint8_t additional_flags,
1222                               uint8_t clear_flags,
1223                               uint8_t *_flags,
1224                               uint16_t additional_flags2,
1225                               uint16_t clear_flags2,
1226                               uint16_t *_flags2)
1227 {
1228         uint8_t flags = 0;
1229         uint16_t flags2 = 0;
1230
1231         if (protocol >= PROTOCOL_LANMAN1) {
1232                 flags |= FLAG_CASELESS_PATHNAMES;
1233                 flags |= FLAG_CANONICAL_PATHNAMES;
1234         }
1235
1236         if (protocol >= PROTOCOL_LANMAN2) {
1237                 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1238                 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1239         }
1240
1241         if (protocol >= PROTOCOL_NT1) {
1242                 flags2 |= FLAGS2_IS_LONG_NAME;
1243
1244                 if (smb1_capabilities & CAP_UNICODE) {
1245                         flags2 |= FLAGS2_UNICODE_STRINGS;
1246                 }
1247                 if (smb1_capabilities & CAP_STATUS32) {
1248                         flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1249                 }
1250                 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1251                         flags2 |= FLAGS2_EXTENDED_SECURITY;
1252                 }
1253         }
1254
1255         flags |= additional_flags;
1256         flags &= ~clear_flags;
1257         flags2 |= additional_flags2;
1258         flags2 &= ~clear_flags2;
1259
1260         *_flags = flags;
1261         *_flags2 = flags2;
1262 }
1263
1264 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1265
1266 static bool smb1cli_req_cancel(struct tevent_req *req)
1267 {
1268         struct smbXcli_req_state *state =
1269                 tevent_req_data(req,
1270                 struct smbXcli_req_state);
1271         uint8_t flags;
1272         uint16_t flags2;
1273         uint32_t pid;
1274         uint16_t mid;
1275         struct tevent_req *subreq;
1276         NTSTATUS status;
1277
1278         flags = CVAL(state->smb1.hdr, HDR_FLG);
1279         flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1280         pid  = SVAL(state->smb1.hdr, HDR_PID);
1281         pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1282         mid = SVAL(state->smb1.hdr, HDR_MID);
1283
1284         subreq = smb1cli_req_create(state, state->ev,
1285                                     state->conn,
1286                                     SMBntcancel,
1287                                     flags, 0,
1288                                     flags2, 0,
1289                                     0, /* timeout */
1290                                     pid,
1291                                     state->tcon,
1292                                     state->session,
1293                                     0, NULL, /* vwv */
1294                                     0, NULL); /* bytes */
1295         if (subreq == NULL) {
1296                 return false;
1297         }
1298         smb1cli_req_set_mid(subreq, mid);
1299
1300         status = smb1cli_req_chain_submit(&subreq, 1);
1301         if (!NT_STATUS_IS_OK(status)) {
1302                 TALLOC_FREE(subreq);
1303                 return false;
1304         }
1305         smb1cli_req_set_mid(subreq, 0);
1306
1307         tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1308
1309         return true;
1310 }
1311
1312 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1313 {
1314         /* we do not care about the result */
1315         TALLOC_FREE(subreq);
1316 }
1317
1318 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1319                                       struct tevent_context *ev,
1320                                       struct smbXcli_conn *conn,
1321                                       uint8_t smb_command,
1322                                       uint8_t additional_flags,
1323                                       uint8_t clear_flags,
1324                                       uint16_t additional_flags2,
1325                                       uint16_t clear_flags2,
1326                                       uint32_t timeout_msec,
1327                                       uint32_t pid,
1328                                       struct smbXcli_tcon *tcon,
1329                                       struct smbXcli_session *session,
1330                                       uint8_t wct, uint16_t *vwv,
1331                                       int iov_count,
1332                                       struct iovec *bytes_iov)
1333 {
1334         struct tevent_req *req;
1335         struct smbXcli_req_state *state;
1336         uint8_t flags = 0;
1337         uint16_t flags2 = 0;
1338         uint16_t uid = 0;
1339         uint16_t tid = 0;
1340         ssize_t num_bytes;
1341
1342         if (iov_count > MAX_SMB_IOV) {
1343                 /*
1344                  * Should not happen :-)
1345                  */
1346                 return NULL;
1347         }
1348
1349         req = tevent_req_create(mem_ctx, &state,
1350                                 struct smbXcli_req_state);
1351         if (req == NULL) {
1352                 return NULL;
1353         }
1354         state->ev = ev;
1355         state->conn = conn;
1356         state->session = session;
1357         state->tcon = tcon;
1358
1359         if (session) {
1360                 uid = session->smb1.session_id;
1361         }
1362
1363         if (tcon) {
1364                 tid = tcon->smb1.tcon_id;
1365
1366                 if (tcon->fs_attributes & FILE_CASE_SENSITIVE_SEARCH) {
1367                         clear_flags |= FLAG_CASELESS_PATHNAMES;
1368                 } else {
1369                         /* Default setting, case insensitive. */
1370                         additional_flags |= FLAG_CASELESS_PATHNAMES;
1371                 }
1372
1373                 if (smbXcli_conn_dfs_supported(conn) &&
1374                     smbXcli_tcon_is_dfs_share(tcon))
1375                 {
1376                         additional_flags2 |= FLAGS2_DFS_PATHNAMES;
1377                 }
1378         }
1379
1380         state->smb1.recv_cmd = 0xFF;
1381         state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1382         state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1383         if (state->smb1.recv_iov == NULL) {
1384                 TALLOC_FREE(req);
1385                 return NULL;
1386         }
1387
1388         smb1cli_req_flags(conn->protocol,
1389                           conn->smb1.capabilities,
1390                           smb_command,
1391                           additional_flags,
1392                           clear_flags,
1393                           &flags,
1394                           additional_flags2,
1395                           clear_flags2,
1396                           &flags2);
1397
1398         SIVAL(state->smb1.hdr, 0,           SMB_MAGIC);
1399         SCVAL(state->smb1.hdr, HDR_COM,     smb_command);
1400         SIVAL(state->smb1.hdr, HDR_RCLS,    NT_STATUS_V(NT_STATUS_OK));
1401         SCVAL(state->smb1.hdr, HDR_FLG,     flags);
1402         SSVAL(state->smb1.hdr, HDR_FLG2,    flags2);
1403         SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1404         SSVAL(state->smb1.hdr, HDR_TID,     tid);
1405         SSVAL(state->smb1.hdr, HDR_PID,     pid);
1406         SSVAL(state->smb1.hdr, HDR_UID,     uid);
1407         SSVAL(state->smb1.hdr, HDR_MID,     0); /* this comes later */
1408         SCVAL(state->smb1.hdr, HDR_WCT,     wct);
1409
1410         state->smb1.vwv = vwv;
1411
1412         num_bytes = iov_buflen(bytes_iov, iov_count);
1413         if (num_bytes == -1) {
1414                 /*
1415                  * I'd love to add a check for num_bytes<=UINT16_MAX here, but
1416                  * the smbclient->samba connections can lie and transfer more.
1417                  */
1418                 TALLOC_FREE(req);
1419                 return NULL;
1420         }
1421
1422         SSVAL(state->smb1.bytecount_buf, 0, num_bytes);
1423
1424         state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1425         state->smb1.iov[0].iov_len  = sizeof(state->length_hdr);
1426         state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1427         state->smb1.iov[1].iov_len  = sizeof(state->smb1.hdr);
1428         state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1429         state->smb1.iov[2].iov_len  = wct * sizeof(uint16_t);
1430         state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1431         state->smb1.iov[3].iov_len  = sizeof(uint16_t);
1432
1433         if (iov_count != 0) {
1434                 memcpy(&state->smb1.iov[4], bytes_iov,
1435                        iov_count * sizeof(*bytes_iov));
1436         }
1437         state->smb1.iov_count = iov_count + 4;
1438
1439         if (timeout_msec > 0) {
1440                 struct timeval endtime;
1441
1442                 endtime = timeval_current_ofs_msec(timeout_msec);
1443                 if (!tevent_req_set_endtime(req, ev, endtime)) {
1444                         return req;
1445                 }
1446         }
1447
1448         switch (smb_command) {
1449         case SMBtranss:
1450         case SMBtranss2:
1451         case SMBnttranss:
1452                 state->one_way = true;
1453                 break;
1454         case SMBntcancel:
1455                 state->one_way = true;
1456                 state->smb1.one_way_seqnum = true;
1457                 break;
1458         case SMBlockingX:
1459                 if ((wct == 8) &&
1460                     (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1461                         state->one_way = true;
1462                 }
1463                 break;
1464         }
1465
1466         return req;
1467 }
1468
1469 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1470                                    struct iovec *iov, int iov_count,
1471                                    uint32_t *seqnum,
1472                                    bool one_way_seqnum)
1473 {
1474         TALLOC_CTX *frame = NULL;
1475         uint8_t *buf;
1476
1477         /*
1478          * Obvious optimization: Make cli_calculate_sign_mac work with struct
1479          * iovec directly. MD5Update would do that just fine.
1480          */
1481
1482         if (iov_count < 4) {
1483                 return NT_STATUS_INVALID_PARAMETER_MIX;
1484         }
1485         if (iov[0].iov_len != NBT_HDR_SIZE) {
1486                 return NT_STATUS_INVALID_PARAMETER_MIX;
1487         }
1488         if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1489                 return NT_STATUS_INVALID_PARAMETER_MIX;
1490         }
1491         if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1492                 return NT_STATUS_INVALID_PARAMETER_MIX;
1493         }
1494         if (iov[3].iov_len != sizeof(uint16_t)) {
1495                 return NT_STATUS_INVALID_PARAMETER_MIX;
1496         }
1497
1498         frame = talloc_stackframe();
1499
1500         buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1501         if (buf == NULL) {
1502                 return NT_STATUS_NO_MEMORY;
1503         }
1504
1505         *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1506                                           one_way_seqnum);
1507         smb_signing_sign_pdu(conn->smb1.signing,
1508                              buf, talloc_get_size(buf),
1509                              *seqnum);
1510         memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1511
1512         TALLOC_FREE(frame);
1513         return NT_STATUS_OK;
1514 }
1515
1516 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1517 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1518                                                TALLOC_CTX *tmp_mem,
1519                                                uint8_t *inbuf);
1520
1521 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1522                                           struct smbXcli_req_state *state,
1523                                           struct iovec *iov, int iov_count)
1524 {
1525         struct tevent_req *subreq;
1526         NTSTATUS status;
1527         uint8_t cmd;
1528         uint16_t mid;
1529         ssize_t nbtlen;
1530
1531         if (!smbXcli_conn_is_connected(state->conn)) {
1532                 return NT_STATUS_CONNECTION_DISCONNECTED;
1533         }
1534
1535         if (state->conn->protocol > PROTOCOL_NT1) {
1536                 return NT_STATUS_REVISION_MISMATCH;
1537         }
1538
1539         if (iov_count < 4) {
1540                 return NT_STATUS_INVALID_PARAMETER_MIX;
1541         }
1542         if (iov[0].iov_len != NBT_HDR_SIZE) {
1543                 return NT_STATUS_INVALID_PARAMETER_MIX;
1544         }
1545         if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1546                 return NT_STATUS_INVALID_PARAMETER_MIX;
1547         }
1548         if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1549                 return NT_STATUS_INVALID_PARAMETER_MIX;
1550         }
1551         if (iov[3].iov_len != sizeof(uint16_t)) {
1552                 return NT_STATUS_INVALID_PARAMETER_MIX;
1553         }
1554
1555         cmd = CVAL(iov[1].iov_base, HDR_COM);
1556         if (cmd == SMBreadBraw) {
1557                 if (smbXcli_conn_has_async_calls(state->conn)) {
1558                         return NT_STATUS_INVALID_PARAMETER_MIX;
1559                 }
1560                 state->conn->smb1.read_braw_req = req;
1561         }
1562
1563         if (state->smb1.mid != 0) {
1564                 mid = state->smb1.mid;
1565         } else {
1566                 mid = smb1cli_alloc_mid(state->conn);
1567         }
1568         SSVAL(iov[1].iov_base, HDR_MID, mid);
1569
1570         nbtlen = iov_buflen(&iov[1], iov_count-1);
1571         if ((nbtlen == -1) || (nbtlen > 0x1FFFF)) {
1572                 return NT_STATUS_INVALID_PARAMETER_MIX;
1573         }
1574
1575         _smb_setlen_nbt(iov[0].iov_base, nbtlen);
1576
1577         status = smb1cli_conn_signv(state->conn, iov, iov_count,
1578                                     &state->smb1.seqnum,
1579                                     state->smb1.one_way_seqnum);
1580
1581         if (!NT_STATUS_IS_OK(status)) {
1582                 return status;
1583         }
1584
1585         /*
1586          * If we supported multiple encrytion contexts
1587          * here we'd look up based on tid.
1588          */
1589         if (common_encryption_on(state->conn->smb1.trans_enc)) {
1590                 char *buf, *enc_buf;
1591
1592                 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1593                 if (buf == NULL) {
1594                         return NT_STATUS_NO_MEMORY;
1595                 }
1596                 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1597                                                (char *)buf, &enc_buf);
1598                 TALLOC_FREE(buf);
1599                 if (!NT_STATUS_IS_OK(status)) {
1600                         DEBUG(0, ("Error in encrypting client message: %s\n",
1601                                   nt_errstr(status)));
1602                         return status;
1603                 }
1604                 buf = (char *)talloc_memdup(state, enc_buf,
1605                                             smb_len_nbt(enc_buf)+4);
1606                 SAFE_FREE(enc_buf);
1607                 if (buf == NULL) {
1608                         return NT_STATUS_NO_MEMORY;
1609                 }
1610                 iov[0].iov_base = (void *)buf;
1611                 iov[0].iov_len = talloc_get_size(buf);
1612                 iov_count = 1;
1613         }
1614
1615         if (state->conn->dispatch_incoming == NULL) {
1616                 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1617         }
1618
1619         if (!smbXcli_req_set_pending(req)) {
1620                 return NT_STATUS_NO_MEMORY;
1621         }
1622
1623         tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1624
1625         subreq = writev_send(state, state->ev, state->conn->outgoing,
1626                              state->conn->sock_fd, false, iov, iov_count);
1627         if (subreq == NULL) {
1628                 return NT_STATUS_NO_MEMORY;
1629         }
1630         tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1631         state->write_req = subreq;
1632
1633         return NT_STATUS_OK;
1634 }
1635
1636 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1637                                     struct tevent_context *ev,
1638                                     struct smbXcli_conn *conn,
1639                                     uint8_t smb_command,
1640                                     uint8_t additional_flags,
1641                                     uint8_t clear_flags,
1642                                     uint16_t additional_flags2,
1643                                     uint16_t clear_flags2,
1644                                     uint32_t timeout_msec,
1645                                     uint32_t pid,
1646                                     struct smbXcli_tcon *tcon,
1647                                     struct smbXcli_session *session,
1648                                     uint8_t wct, uint16_t *vwv,
1649                                     uint32_t num_bytes,
1650                                     const uint8_t *bytes)
1651 {
1652         struct tevent_req *req;
1653         struct iovec iov;
1654         NTSTATUS status;
1655
1656         iov.iov_base = discard_const_p(void, bytes);
1657         iov.iov_len = num_bytes;
1658
1659         req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1660                                  additional_flags, clear_flags,
1661                                  additional_flags2, clear_flags2,
1662                                  timeout_msec,
1663                                  pid, tcon, session,
1664                                  wct, vwv, 1, &iov);
1665         if (req == NULL) {
1666                 return NULL;
1667         }
1668         if (!tevent_req_is_in_progress(req)) {
1669                 return tevent_req_post(req, ev);
1670         }
1671         status = smb1cli_req_chain_submit(&req, 1);
1672         if (tevent_req_nterror(req, status)) {
1673                 return tevent_req_post(req, ev);
1674         }
1675         return req;
1676 }
1677
1678 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1679 {
1680         struct tevent_req *req =
1681                 tevent_req_callback_data(subreq,
1682                 struct tevent_req);
1683         struct smbXcli_req_state *state =
1684                 tevent_req_data(req,
1685                 struct smbXcli_req_state);
1686         ssize_t nwritten;
1687         int err;
1688
1689         state->write_req = NULL;
1690
1691         nwritten = writev_recv(subreq, &err);
1692         TALLOC_FREE(subreq);
1693         if (nwritten == -1) {
1694                 /* here, we need to notify all pending requests */
1695                 NTSTATUS status = map_nt_error_from_unix_common(err);
1696                 smbXcli_conn_disconnect(state->conn, status);
1697                 return;
1698         }
1699
1700         if (state->one_way) {
1701                 state->inbuf = NULL;
1702                 tevent_req_done(req);
1703                 return;
1704         }
1705 }
1706
1707 static void smbXcli_conn_received(struct tevent_req *subreq)
1708 {
1709         struct smbXcli_conn *conn =
1710                 tevent_req_callback_data(subreq,
1711                 struct smbXcli_conn);
1712         TALLOC_CTX *frame = talloc_stackframe();
1713         NTSTATUS status;
1714         uint8_t *inbuf;
1715         ssize_t received;
1716         int err;
1717
1718         if (subreq != conn->read_smb_req) {
1719                 DEBUG(1, ("Internal error: cli_smb_received called with "
1720                           "unexpected subreq\n"));
1721                 smbXcli_conn_disconnect(conn, NT_STATUS_INTERNAL_ERROR);
1722                 TALLOC_FREE(frame);
1723                 return;
1724         }
1725         conn->read_smb_req = NULL;
1726
1727         received = read_smb_recv(subreq, frame, &inbuf, &err);
1728         TALLOC_FREE(subreq);
1729         if (received == -1) {
1730                 status = map_nt_error_from_unix_common(err);
1731                 smbXcli_conn_disconnect(conn, status);
1732                 TALLOC_FREE(frame);
1733                 return;
1734         }
1735
1736         status = conn->dispatch_incoming(conn, frame, inbuf);
1737         TALLOC_FREE(frame);
1738         if (NT_STATUS_IS_OK(status)) {
1739                 /*
1740                  * We should not do any more processing
1741                  * as the dispatch function called
1742                  * tevent_req_done().
1743                  */
1744                 return;
1745         }
1746
1747         if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1748                 /*
1749                  * We got an error, so notify all pending requests
1750                  */
1751                 smbXcli_conn_disconnect(conn, status);
1752                 return;
1753         }
1754
1755         /*
1756          * We got NT_STATUS_RETRY, so we may ask for a
1757          * next incoming pdu.
1758          */
1759         if (!smbXcli_conn_receive_next(conn)) {
1760                 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1761         }
1762 }
1763
1764 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1765                                           struct iovec **piov, int *pnum_iov)
1766 {
1767         struct iovec *iov;
1768         int num_iov;
1769         size_t buflen;
1770         size_t taken;
1771         size_t remaining;
1772         uint8_t *hdr;
1773         uint8_t cmd;
1774         uint32_t wct_ofs;
1775         NTSTATUS status;
1776         size_t min_size = MIN_SMB_SIZE;
1777
1778         buflen = smb_len_tcp(buf);
1779         taken = 0;
1780
1781         hdr = buf + NBT_HDR_SIZE;
1782
1783         status = smb1cli_pull_raw_error(hdr);
1784         if (NT_STATUS_IS_ERR(status)) {
1785                 /*
1786                  * This is an ugly hack to support OS/2
1787                  * which skips the byte_count in the DATA block
1788                  * on some error responses.
1789                  *
1790                  * See bug #9096
1791                  */
1792                 min_size -= sizeof(uint16_t);
1793         }
1794
1795         if (buflen < min_size) {
1796                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1797         }
1798
1799         /*
1800          * This returns iovec elements in the following order:
1801          *
1802          * - SMB header
1803          *
1804          * - Parameter Block
1805          * - Data Block
1806          *
1807          * - Parameter Block
1808          * - Data Block
1809          *
1810          * - Parameter Block
1811          * - Data Block
1812          */
1813         num_iov = 1;
1814
1815         iov = talloc_array(mem_ctx, struct iovec, num_iov);
1816         if (iov == NULL) {
1817                 return NT_STATUS_NO_MEMORY;
1818         }
1819         iov[0].iov_base = hdr;
1820         iov[0].iov_len = HDR_WCT;
1821         taken += HDR_WCT;
1822
1823         cmd = CVAL(hdr, HDR_COM);
1824         wct_ofs = HDR_WCT;
1825
1826         while (true) {
1827                 size_t len = buflen - taken;
1828                 struct iovec *cur;
1829                 struct iovec *iov_tmp;
1830                 uint8_t wct;
1831                 uint32_t bcc_ofs;
1832                 uint16_t bcc;
1833                 size_t needed;
1834
1835                 /*
1836                  * we need at least WCT
1837                  */
1838                 needed = sizeof(uint8_t);
1839                 if (len < needed) {
1840                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1841                                    __location__, (int)len, (int)needed));
1842                         goto inval;
1843                 }
1844
1845                 /*
1846                  * Now we check if the specified words are there
1847                  */
1848                 wct = CVAL(hdr, wct_ofs);
1849                 needed += wct * sizeof(uint16_t);
1850                 if (len < needed) {
1851                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1852                                    __location__, (int)len, (int)needed));
1853                         goto inval;
1854                 }
1855
1856                 if ((num_iov == 1) &&
1857                     (len == needed) &&
1858                     NT_STATUS_IS_ERR(status))
1859                 {
1860                         /*
1861                          * This is an ugly hack to support OS/2
1862                          * which skips the byte_count in the DATA block
1863                          * on some error responses.
1864                          *
1865                          * See bug #9096
1866                          */
1867                         iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1868                                                  num_iov + 2);
1869                         if (iov_tmp == NULL) {
1870                                 TALLOC_FREE(iov);
1871                                 return NT_STATUS_NO_MEMORY;
1872                         }
1873                         iov = iov_tmp;
1874                         cur = &iov[num_iov];
1875                         num_iov += 2;
1876
1877                         cur[0].iov_len = 0;
1878                         cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1879                         cur[1].iov_len = 0;
1880                         cur[1].iov_base = cur[0].iov_base;
1881
1882                         taken += needed;
1883                         break;
1884                 }
1885
1886                 /*
1887                  * we need at least BCC
1888                  */
1889                 needed += sizeof(uint16_t);
1890                 if (len < needed) {
1891                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1892                                    __location__, (int)len, (int)needed));
1893                         goto inval;
1894                 }
1895
1896                 /*
1897                  * Now we check if the specified bytes are there
1898                  */
1899                 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1900                 bcc = SVAL(hdr, bcc_ofs);
1901                 needed += bcc * sizeof(uint8_t);
1902                 if (len < needed) {
1903                         DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1904                                    __location__, (int)len, (int)needed));
1905                         goto inval;
1906                 }
1907
1908                 /*
1909                  * we allocate 2 iovec structures for words and bytes
1910                  */
1911                 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1912                                          num_iov + 2);
1913                 if (iov_tmp == NULL) {
1914                         TALLOC_FREE(iov);
1915                         return NT_STATUS_NO_MEMORY;
1916                 }
1917                 iov = iov_tmp;
1918                 cur = &iov[num_iov];
1919                 num_iov += 2;
1920
1921                 cur[0].iov_len = wct * sizeof(uint16_t);
1922                 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1923                 cur[1].iov_len = bcc * sizeof(uint8_t);
1924                 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1925
1926                 taken += needed;
1927
1928                 if (!smb1cli_is_andx_req(cmd)) {
1929                         /*
1930                          * If the current command does not have AndX chanining
1931                          * we are done.
1932                          */
1933                         break;
1934                 }
1935
1936                 if (wct == 0 && bcc == 0) {
1937                         /*
1938                          * An empty response also ends the chain,
1939                          * most likely with an error.
1940                          */
1941                         break;
1942                 }
1943
1944                 if (wct < 2) {
1945                         DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1946                                    __location__, (int)wct, (int)cmd));
1947                         goto inval;
1948                 }
1949                 cmd = CVAL(cur[0].iov_base, 0);
1950                 if (cmd == 0xFF) {
1951                         /*
1952                          * If it is the end of the chain we are also done.
1953                          */
1954                         break;
1955                 }
1956                 wct_ofs = SVAL(cur[0].iov_base, 2);
1957
1958                 if (wct_ofs < taken) {
1959                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1960                 }
1961                 if (wct_ofs > buflen) {
1962                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1963                 }
1964
1965                 /*
1966                  * we consumed everything up to the start of the next
1967                  * parameter block.
1968                  */
1969                 taken = wct_ofs;
1970         }
1971
1972         remaining = buflen - taken;
1973
1974         if (remaining > 0 && num_iov >= 3) {
1975                 /*
1976                  * The last DATA block gets the remaining
1977                  * bytes, this is needed to support
1978                  * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1979                  */
1980                 iov[num_iov-1].iov_len += remaining;
1981         }
1982
1983         *piov = iov;
1984         *pnum_iov = num_iov;
1985         return NT_STATUS_OK;
1986
1987 inval:
1988         TALLOC_FREE(iov);
1989         return NT_STATUS_INVALID_NETWORK_RESPONSE;
1990 }
1991
1992 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1993                                                TALLOC_CTX *tmp_mem,
1994                                                uint8_t *inbuf)
1995 {
1996         struct tevent_req *req;
1997         struct smbXcli_req_state *state;
1998         NTSTATUS status;
1999         size_t num_pending;
2000         size_t i;
2001         uint8_t cmd;
2002         uint16_t mid;
2003         bool oplock_break;
2004         uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
2005         size_t len = smb_len_tcp(inbuf);
2006         struct iovec *iov = NULL;
2007         int num_iov = 0;
2008         struct tevent_req **chain = NULL;
2009         size_t num_chained = 0;
2010         size_t num_responses = 0;
2011
2012         if (conn->smb1.read_braw_req != NULL) {
2013                 req = conn->smb1.read_braw_req;
2014                 conn->smb1.read_braw_req = NULL;
2015                 state = tevent_req_data(req, struct smbXcli_req_state);
2016
2017                 smbXcli_req_unset_pending(req);
2018
2019                 if (state->smb1.recv_iov == NULL) {
2020                         /*
2021                          * For requests with more than
2022                          * one response, we have to readd the
2023                          * recv_iov array.
2024                          */
2025                         state->smb1.recv_iov = talloc_zero_array(state,
2026                                                                  struct iovec,
2027                                                                  3);
2028                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2029                                 return NT_STATUS_OK;
2030                         }
2031                 }
2032
2033                 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
2034                 state->smb1.recv_iov[0].iov_len = len;
2035                 ZERO_STRUCT(state->smb1.recv_iov[1]);
2036                 ZERO_STRUCT(state->smb1.recv_iov[2]);
2037
2038                 state->smb1.recv_cmd = SMBreadBraw;
2039                 state->smb1.recv_status = NT_STATUS_OK;
2040                 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2041
2042                 tevent_req_done(req);
2043                 return NT_STATUS_OK;
2044         }
2045
2046         if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
2047             && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
2048                 DEBUG(10, ("Got non-SMB PDU\n"));
2049                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2050         }
2051
2052         /*
2053          * If we supported multiple encrytion contexts
2054          * here we'd look up based on tid.
2055          */
2056         if (common_encryption_on(conn->smb1.trans_enc)
2057             && (CVAL(inbuf, 0) == 0)) {
2058                 uint16_t enc_ctx_num;
2059
2060                 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
2061                 if (!NT_STATUS_IS_OK(status)) {
2062                         DEBUG(10, ("get_enc_ctx_num returned %s\n",
2063                                    nt_errstr(status)));
2064                         return status;
2065                 }
2066
2067                 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
2068                         DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
2069                                    enc_ctx_num,
2070                                    conn->smb1.trans_enc->enc_ctx_num));
2071                         return NT_STATUS_INVALID_HANDLE;
2072                 }
2073
2074                 status = common_decrypt_buffer(conn->smb1.trans_enc,
2075                                                (char *)inbuf);
2076                 if (!NT_STATUS_IS_OK(status)) {
2077                         DEBUG(10, ("common_decrypt_buffer returned %s\n",
2078                                    nt_errstr(status)));
2079                         return status;
2080                 }
2081                 inhdr = inbuf + NBT_HDR_SIZE;
2082                 len = smb_len_nbt(inbuf);
2083         }
2084
2085         mid = SVAL(inhdr, HDR_MID);
2086         num_pending = talloc_array_length(conn->pending);
2087
2088         for (i=0; i<num_pending; i++) {
2089                 if (mid == smb1cli_req_mid(conn->pending[i])) {
2090                         break;
2091                 }
2092         }
2093         if (i == num_pending) {
2094                 /* Dump unexpected reply */
2095                 return NT_STATUS_RETRY;
2096         }
2097
2098         oplock_break = false;
2099
2100         if (mid == 0xffff) {
2101                 /*
2102                  * Paranoia checks that this is really an oplock break request.
2103                  */
2104                 oplock_break = (len == 51); /* hdr + 8 words */
2105                 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
2106                 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
2107                 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
2108                 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
2109
2110                 if (!oplock_break) {
2111                         /* Dump unexpected reply */
2112                         return NT_STATUS_RETRY;
2113                 }
2114         }
2115
2116         req = conn->pending[i];
2117         state = tevent_req_data(req, struct smbXcli_req_state);
2118
2119         if (!oplock_break /* oplock breaks are not signed */
2120             && !smb_signing_check_pdu(conn->smb1.signing,
2121                                       inhdr, len, state->smb1.seqnum+1)) {
2122                 DEBUG(10, ("cli_check_sign_mac failed\n"));
2123                 return NT_STATUS_ACCESS_DENIED;
2124         }
2125
2126         status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
2127                                            &iov, &num_iov);
2128         if (!NT_STATUS_IS_OK(status)) {
2129                 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
2130                           nt_errstr(status)));
2131                 return status;
2132         }
2133
2134         cmd = CVAL(inhdr, HDR_COM);
2135         status = smb1cli_pull_raw_error(inhdr);
2136
2137         if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
2138             (state->session != NULL) && state->session->disconnect_expired)
2139         {
2140                 /*
2141                  * this should be a short term hack
2142                  * until the upper layers have implemented
2143                  * re-authentication.
2144                  */
2145                 return status;
2146         }
2147
2148         if (state->smb1.chained_requests == NULL) {
2149                 if (num_iov != 3) {
2150                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
2151                 }
2152
2153                 smbXcli_req_unset_pending(req);
2154
2155                 if (state->smb1.recv_iov == NULL) {
2156                         /*
2157                          * For requests with more than
2158                          * one response, we have to readd the
2159                          * recv_iov array.
2160                          */
2161                         state->smb1.recv_iov = talloc_zero_array(state,
2162                                                                  struct iovec,
2163                                                                  3);
2164                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2165                                 return NT_STATUS_OK;
2166                         }
2167                 }
2168
2169                 state->smb1.recv_cmd = cmd;
2170                 state->smb1.recv_status = status;
2171                 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2172
2173                 state->smb1.recv_iov[0] = iov[0];
2174                 state->smb1.recv_iov[1] = iov[1];
2175                 state->smb1.recv_iov[2] = iov[2];
2176
2177                 if (talloc_array_length(conn->pending) == 0) {
2178                         tevent_req_done(req);
2179                         return NT_STATUS_OK;
2180                 }
2181
2182                 tevent_req_defer_callback(req, state->ev);
2183                 tevent_req_done(req);
2184                 return NT_STATUS_RETRY;
2185         }
2186
2187         chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2188         num_chained = talloc_array_length(chain);
2189         num_responses = (num_iov - 1)/2;
2190
2191         if (num_responses > num_chained) {
2192                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2193         }
2194
2195         for (i=0; i<num_chained; i++) {
2196                 size_t iov_idx = 1 + (i*2);
2197                 struct iovec *cur = &iov[iov_idx];
2198                 uint8_t *inbuf_ref;
2199
2200                 req = chain[i];
2201                 state = tevent_req_data(req, struct smbXcli_req_state);
2202
2203                 smbXcli_req_unset_pending(req);
2204
2205                 /*
2206                  * as we finish multiple requests here
2207                  * we need to defer the callbacks as
2208                  * they could destroy our current stack state.
2209                  */
2210                 tevent_req_defer_callback(req, state->ev);
2211
2212                 if (i >= num_responses) {
2213                         tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2214                         continue;
2215                 }
2216
2217                 if (state->smb1.recv_iov == NULL) {
2218                         /*
2219                          * For requests with more than
2220                          * one response, we have to readd the
2221                          * recv_iov array.
2222                          */
2223                         state->smb1.recv_iov = talloc_zero_array(state,
2224                                                                  struct iovec,
2225                                                                  3);
2226                         if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2227                                 continue;
2228                         }
2229                 }
2230
2231                 state->smb1.recv_cmd = cmd;
2232
2233                 if (i == (num_responses - 1)) {
2234                         /*
2235                          * The last request in the chain gets the status
2236                          */
2237                         state->smb1.recv_status = status;
2238                 } else {
2239                         cmd = CVAL(cur[0].iov_base, 0);
2240                         state->smb1.recv_status = NT_STATUS_OK;
2241                 }
2242
2243                 state->inbuf = inbuf;
2244
2245                 /*
2246                  * Note: here we use talloc_reference() in a way
2247                  *       that does not expose it to the caller.
2248                  */
2249                 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2250                 if (tevent_req_nomem(inbuf_ref, req)) {
2251                         continue;
2252                 }
2253
2254                 /* copy the related buffers */
2255                 state->smb1.recv_iov[0] = iov[0];
2256                 state->smb1.recv_iov[1] = cur[0];
2257                 state->smb1.recv_iov[2] = cur[1];
2258
2259                 tevent_req_done(req);
2260         }
2261
2262         return NT_STATUS_RETRY;
2263 }
2264
2265 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2266                           TALLOC_CTX *mem_ctx,
2267                           struct iovec **piov,
2268                           uint8_t **phdr,
2269                           uint8_t *pwct,
2270                           uint16_t **pvwv,
2271                           uint32_t *pvwv_offset,
2272                           uint32_t *pnum_bytes,
2273                           uint8_t **pbytes,
2274                           uint32_t *pbytes_offset,
2275                           uint8_t **pinbuf,
2276                           const struct smb1cli_req_expected_response *expected,
2277                           size_t num_expected)
2278 {
2279         struct smbXcli_req_state *state =
2280                 tevent_req_data(req,
2281                 struct smbXcli_req_state);
2282         NTSTATUS status = NT_STATUS_OK;
2283         struct iovec *recv_iov = NULL;
2284         uint8_t *hdr = NULL;
2285         uint8_t wct = 0;
2286         uint32_t vwv_offset = 0;
2287         uint16_t *vwv = NULL;
2288         uint32_t num_bytes = 0;
2289         uint32_t bytes_offset = 0;
2290         uint8_t *bytes = NULL;
2291         size_t i;
2292         bool found_status = false;
2293         bool found_size = false;
2294
2295         if (piov != NULL) {
2296                 *piov = NULL;
2297         }
2298         if (phdr != NULL) {
2299                 *phdr = 0;
2300         }
2301         if (pwct != NULL) {
2302                 *pwct = 0;
2303         }
2304         if (pvwv != NULL) {
2305                 *pvwv = NULL;
2306         }
2307         if (pvwv_offset != NULL) {
2308                 *pvwv_offset = 0;
2309         }
2310         if (pnum_bytes != NULL) {
2311                 *pnum_bytes = 0;
2312         }
2313         if (pbytes != NULL) {
2314                 *pbytes = NULL;
2315         }
2316         if (pbytes_offset != NULL) {
2317                 *pbytes_offset = 0;
2318         }
2319         if (pinbuf != NULL) {
2320                 *pinbuf = NULL;
2321         }
2322
2323         if (state->inbuf != NULL) {
2324                 recv_iov = state->smb1.recv_iov;
2325                 state->smb1.recv_iov = NULL;
2326                 if (state->smb1.recv_cmd != SMBreadBraw) {
2327                         hdr = (uint8_t *)recv_iov[0].iov_base;
2328                         wct = recv_iov[1].iov_len/2;
2329                         vwv = (uint16_t *)recv_iov[1].iov_base;
2330                         vwv_offset = PTR_DIFF(vwv, hdr);
2331                         num_bytes = recv_iov[2].iov_len;
2332                         bytes = (uint8_t *)recv_iov[2].iov_base;
2333                         bytes_offset = PTR_DIFF(bytes, hdr);
2334                 }
2335         }
2336
2337         if (tevent_req_is_nterror(req, &status)) {
2338                 for (i=0; i < num_expected; i++) {
2339                         if (NT_STATUS_EQUAL(status, expected[i].status)) {
2340                                 found_status = true;
2341                                 break;
2342                         }
2343                 }
2344
2345                 if (found_status) {
2346                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2347                 }
2348
2349                 return status;
2350         }
2351
2352         if (num_expected == 0) {
2353                 found_status = true;
2354                 found_size = true;
2355         }
2356
2357         status = state->smb1.recv_status;
2358
2359         for (i=0; i < num_expected; i++) {
2360                 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2361                         continue;
2362                 }
2363
2364                 found_status = true;
2365                 if (expected[i].wct == 0) {
2366                         found_size = true;
2367                         break;
2368                 }
2369
2370                 if (expected[i].wct == wct) {
2371                         found_size = true;
2372                         break;
2373                 }
2374         }
2375
2376         if (!found_status) {
2377                 return status;
2378         }
2379
2380         if (!found_size) {
2381                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2382         }
2383
2384         if (piov != NULL) {
2385                 *piov = talloc_move(mem_ctx, &recv_iov);
2386         }
2387
2388         if (phdr != NULL) {
2389                 *phdr = hdr;
2390         }
2391         if (pwct != NULL) {
2392                 *pwct = wct;
2393         }
2394         if (pvwv != NULL) {
2395                 *pvwv = vwv;
2396         }
2397         if (pvwv_offset != NULL) {
2398                 *pvwv_offset = vwv_offset;
2399         }
2400         if (pnum_bytes != NULL) {
2401                 *pnum_bytes = num_bytes;
2402         }
2403         if (pbytes != NULL) {
2404                 *pbytes = bytes;
2405         }
2406         if (pbytes_offset != NULL) {
2407                 *pbytes_offset = bytes_offset;
2408         }
2409         if (pinbuf != NULL) {
2410                 *pinbuf = state->inbuf;
2411         }
2412
2413         return status;
2414 }
2415
2416 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2417 {
2418         size_t wct_ofs;
2419         int i;
2420
2421         wct_ofs = HDR_WCT;
2422
2423         for (i=0; i<num_reqs; i++) {
2424                 struct smbXcli_req_state *state;
2425                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2426                 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2427                                            state->smb1.iov_count-2);
2428                 wct_ofs = (wct_ofs + 3) & ~3;
2429         }
2430         return wct_ofs;
2431 }
2432
2433 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2434 {
2435         struct smbXcli_req_state *first_state =
2436                 tevent_req_data(reqs[0],
2437                 struct smbXcli_req_state);
2438         struct smbXcli_req_state *state;
2439         size_t wct_offset;
2440         size_t chain_padding = 0;
2441         int i, iovlen;
2442         struct iovec *iov = NULL;
2443         struct iovec *this_iov;
2444         NTSTATUS status;
2445         ssize_t nbt_len;
2446
2447         if (num_reqs == 1) {
2448                 return smb1cli_req_writev_submit(reqs[0], first_state,
2449                                                  first_state->smb1.iov,
2450                                                  first_state->smb1.iov_count);
2451         }
2452
2453         iovlen = 0;
2454         for (i=0; i<num_reqs; i++) {
2455                 if (!tevent_req_is_in_progress(reqs[i])) {
2456                         return NT_STATUS_INTERNAL_ERROR;
2457                 }
2458
2459                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2460
2461                 if (state->smb1.iov_count < 4) {
2462                         return NT_STATUS_INVALID_PARAMETER_MIX;
2463                 }
2464
2465                 if (i == 0) {
2466                         /*
2467                          * The NBT and SMB header
2468                          */
2469                         iovlen += 2;
2470                 } else {
2471                         /*
2472                          * Chain padding
2473                          */
2474                         iovlen += 1;
2475                 }
2476
2477                 /*
2478                  * words and bytes
2479                  */
2480                 iovlen += state->smb1.iov_count - 2;
2481         }
2482
2483         iov = talloc_zero_array(first_state, struct iovec, iovlen);
2484         if (iov == NULL) {
2485                 return NT_STATUS_NO_MEMORY;
2486         }
2487
2488         first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2489                 first_state, reqs, sizeof(*reqs) * num_reqs);
2490         if (first_state->smb1.chained_requests == NULL) {
2491                 TALLOC_FREE(iov);
2492                 return NT_STATUS_NO_MEMORY;
2493         }
2494
2495         wct_offset = HDR_WCT;
2496         this_iov = iov;
2497
2498         for (i=0; i<num_reqs; i++) {
2499                 size_t next_padding = 0;
2500                 uint16_t *vwv;
2501
2502                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2503
2504                 if (i < num_reqs-1) {
2505                         if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2506                             || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2507                                 TALLOC_FREE(iov);
2508                                 TALLOC_FREE(first_state->smb1.chained_requests);
2509                                 return NT_STATUS_INVALID_PARAMETER_MIX;
2510                         }
2511                 }
2512
2513                 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2514                                               state->smb1.iov_count-2) + 1;
2515                 if ((wct_offset % 4) != 0) {
2516                         next_padding = 4 - (wct_offset % 4);
2517                 }
2518                 wct_offset += next_padding;
2519                 vwv = state->smb1.vwv;
2520
2521                 if (i < num_reqs-1) {
2522                         struct smbXcli_req_state *next_state =
2523                                 tevent_req_data(reqs[i+1],
2524                                 struct smbXcli_req_state);
2525                         SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2526                         SCVAL(vwv+0, 1, 0);
2527                         SSVAL(vwv+1, 0, wct_offset);
2528                 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2529                         /* properly end the chain */
2530                         SCVAL(vwv+0, 0, 0xff);
2531                         SCVAL(vwv+0, 1, 0xff);
2532                         SSVAL(vwv+1, 0, 0);
2533                 }
2534
2535                 if (i == 0) {
2536                         /*
2537                          * The NBT and SMB header
2538                          */
2539                         this_iov[0] = state->smb1.iov[0];
2540                         this_iov[1] = state->smb1.iov[1];
2541                         this_iov += 2;
2542                 } else {
2543                         /*
2544                          * This one is a bit subtle. We have to add
2545                          * chain_padding bytes between the requests, and we
2546                          * have to also include the wct field of the
2547                          * subsequent requests. We use the subsequent header
2548                          * for the padding, it contains the wct field in its
2549                          * last byte.
2550                          */
2551                         this_iov[0].iov_len = chain_padding+1;
2552                         this_iov[0].iov_base = (void *)&state->smb1.hdr[
2553                                 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2554                         memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2555                         this_iov += 1;
2556                 }
2557
2558                 /*
2559                  * copy the words and bytes
2560                  */
2561                 memcpy(this_iov, state->smb1.iov+2,
2562                        sizeof(struct iovec) * (state->smb1.iov_count-2));
2563                 this_iov += state->smb1.iov_count - 2;
2564                 chain_padding = next_padding;
2565         }
2566
2567         nbt_len = iov_buflen(&iov[1], iovlen-1);
2568         if ((nbt_len == -1) || (nbt_len > first_state->conn->smb1.max_xmit)) {
2569                 TALLOC_FREE(iov);
2570                 TALLOC_FREE(first_state->smb1.chained_requests);
2571                 return NT_STATUS_INVALID_PARAMETER_MIX;
2572         }
2573
2574         status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2575         if (!NT_STATUS_IS_OK(status)) {
2576                 TALLOC_FREE(iov);
2577                 TALLOC_FREE(first_state->smb1.chained_requests);
2578                 return status;
2579         }
2580
2581         return NT_STATUS_OK;
2582 }
2583
2584 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2585 {
2586         return ((tevent_queue_length(conn->outgoing) != 0)
2587                 || (talloc_array_length(conn->pending) != 0));
2588 }
2589
2590 bool smbXcli_conn_dfs_supported(struct smbXcli_conn *conn)
2591 {
2592         if (conn->protocol >= PROTOCOL_SMB2_02) {
2593                 return (smb2cli_conn_server_capabilities(conn) & SMB2_CAP_DFS);
2594         }
2595
2596         return (smb1cli_conn_capabilities(conn) & CAP_DFS);
2597 }
2598
2599 bool smb2cli_conn_req_possible(struct smbXcli_conn *conn, uint32_t *max_dyn_len)
2600 {
2601         uint16_t credits = 1;
2602
2603         if (conn->smb2.cur_credits == 0) {
2604                 if (max_dyn_len != NULL) {
2605                         *max_dyn_len = 0;
2606                 }
2607                 return false;
2608         }
2609
2610         if (conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2611                 credits = conn->smb2.cur_credits;
2612         }
2613
2614         if (max_dyn_len != NULL) {
2615                 *max_dyn_len = credits * 65536;
2616         }
2617
2618         return true;
2619 }
2620
2621 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2622 {
2623         return conn->smb2.server.capabilities;
2624 }
2625
2626 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2627 {
2628         return conn->smb2.server.security_mode;
2629 }
2630
2631 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2632 {
2633         return conn->smb2.server.max_trans_size;
2634 }
2635
2636 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2637 {
2638         return conn->smb2.server.max_read_size;
2639 }
2640
2641 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2642 {
2643         return conn->smb2.server.max_write_size;
2644 }
2645
2646 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2647                                   uint16_t max_credits)
2648 {
2649         conn->smb2.max_credits = max_credits;
2650 }
2651
2652 uint8_t smb2cli_conn_get_io_priority(struct smbXcli_conn *conn)
2653 {
2654         if (conn->protocol < PROTOCOL_SMB3_11) {
2655                 return 0;
2656         }
2657
2658         return conn->smb2.io_priority;
2659 }
2660
2661 void smb2cli_conn_set_io_priority(struct smbXcli_conn *conn,
2662                                   uint8_t io_priority)
2663 {
2664         conn->smb2.io_priority = io_priority;
2665 }
2666
2667 uint32_t smb2cli_conn_cc_chunk_len(struct smbXcli_conn *conn)
2668 {
2669         return conn->smb2.cc_chunk_len;
2670 }
2671
2672 void smb2cli_conn_set_cc_chunk_len(struct smbXcli_conn *conn,
2673                                     uint32_t chunk_len)
2674 {
2675         conn->smb2.cc_chunk_len = chunk_len;
2676 }
2677
2678 uint32_t smb2cli_conn_cc_max_chunks(struct smbXcli_conn *conn)
2679 {
2680         return conn->smb2.cc_max_chunks;
2681 }
2682
2683 void smb2cli_conn_set_cc_max_chunks(struct smbXcli_conn *conn,
2684                                     uint32_t max_chunks)
2685 {
2686         conn->smb2.cc_max_chunks = max_chunks;
2687 }
2688
2689 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2690
2691 static bool smb2cli_req_cancel(struct tevent_req *req)
2692 {
2693         struct smbXcli_req_state *state =
2694                 tevent_req_data(req,
2695                 struct smbXcli_req_state);
2696         struct smbXcli_tcon *tcon = state->tcon;
2697         struct smbXcli_session *session = state->session;
2698         uint8_t *fixed = state->smb2.pad;
2699         uint16_t fixed_len = 4;
2700         struct tevent_req *subreq;
2701         struct smbXcli_req_state *substate;
2702         NTSTATUS status;
2703
2704         SSVAL(fixed, 0, 0x04);
2705         SSVAL(fixed, 2, 0);
2706
2707         subreq = smb2cli_req_create(state, state->ev,
2708                                     state->conn,
2709                                     SMB2_OP_CANCEL,
2710                                     0, 0, /* flags */
2711                                     0, /* timeout */
2712                                     tcon, session,
2713                                     fixed, fixed_len,
2714                                     NULL, 0, 0);
2715         if (subreq == NULL) {
2716                 return false;
2717         }
2718         substate = tevent_req_data(subreq, struct smbXcli_req_state);
2719
2720         SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, state->smb2.cancel_flags);
2721         SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, state->smb2.cancel_mid);
2722         SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, state->smb2.cancel_aid);
2723
2724         status = smb2cli_req_compound_submit(&subreq, 1);
2725         if (!NT_STATUS_IS_OK(status)) {
2726                 TALLOC_FREE(subreq);
2727                 return false;
2728         }
2729
2730         tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2731
2732         return true;
2733 }
2734
2735 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2736 {
2737         /* we do not care about the result */
2738         TALLOC_FREE(subreq);
2739 }
2740
2741 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2742                                       struct tevent_context *ev,
2743                                       struct smbXcli_conn *conn,
2744                                       uint16_t cmd,
2745                                       uint32_t additional_flags,
2746                                       uint32_t clear_flags,
2747                                       uint32_t timeout_msec,
2748                                       struct smbXcli_tcon *tcon,
2749                                       struct smbXcli_session *session,
2750                                       const uint8_t *fixed,
2751                                       uint16_t fixed_len,
2752                                       const uint8_t *dyn,
2753                                       uint32_t dyn_len,
2754                                       uint32_t max_dyn_len)
2755 {
2756         struct tevent_req *req;
2757         struct smbXcli_req_state *state;
2758         uint32_t flags = 0;
2759         uint32_t tid = 0;
2760         uint64_t uid = 0;
2761         bool use_channel_sequence = false;
2762         uint16_t channel_sequence = 0;
2763         bool use_replay_flag = false;
2764
2765         req = tevent_req_create(mem_ctx, &state,
2766                                 struct smbXcli_req_state);
2767         if (req == NULL) {
2768                 return NULL;
2769         }
2770
2771         state->ev = ev;
2772         state->conn = conn;
2773         state->session = session;
2774         state->tcon = tcon;
2775
2776         if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2777                 use_channel_sequence = true;
2778         } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2779                 use_channel_sequence = true;
2780         }
2781
2782         if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_00) {
2783                 use_replay_flag = true;
2784         }
2785
2786         if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_11) {
2787                 flags |= SMB2_PRIORITY_VALUE_TO_MASK(conn->smb2.io_priority);
2788         }
2789
2790         if (session) {
2791                 uid = session->smb2->session_id;
2792
2793                 if (use_channel_sequence) {
2794                         channel_sequence = session->smb2->channel_sequence;
2795                 }
2796
2797                 if (use_replay_flag && session->smb2->replay_active) {
2798                         additional_flags |= SMB2_HDR_FLAG_REPLAY_OPERATION;
2799                 }
2800
2801                 state->smb2.should_sign = session->smb2->should_sign;
2802                 state->smb2.should_encrypt = session->smb2->should_encrypt;
2803
2804                 if (cmd == SMB2_OP_SESSSETUP &&
2805                     session->smb2_channel.signing_key.length == 0 &&
2806                     session->smb2->signing_key.length != 0)
2807                 {
2808                         /*
2809                          * a session bind needs to be signed
2810                          */
2811                         state->smb2.should_sign = true;
2812                 }
2813
2814                 if (cmd == SMB2_OP_SESSSETUP &&
2815                     session->smb2_channel.signing_key.length == 0) {
2816                         state->smb2.should_encrypt = false;
2817                 }
2818
2819                 if (additional_flags & SMB2_HDR_FLAG_SIGNED) {
2820                         if (session->smb2_channel.signing_key.length == 0) {
2821                                 tevent_req_nterror(req, NT_STATUS_NO_USER_SESSION_KEY);
2822                                 return req;
2823                         }
2824
2825                         additional_flags &= ~SMB2_HDR_FLAG_SIGNED;
2826                         state->smb2.should_sign = true;
2827                 }
2828         }
2829
2830         if (tcon) {
2831                 tid = tcon->smb2.tcon_id;
2832
2833                 if (tcon->smb2.should_sign) {
2834                         state->smb2.should_sign = true;
2835                 }
2836                 if (tcon->smb2.should_encrypt) {
2837                         state->smb2.should_encrypt = true;
2838                 }
2839         }
2840
2841         if (state->smb2.should_encrypt) {
2842                 state->smb2.should_sign = false;
2843         }
2844
2845         state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2846         if (state->smb2.recv_iov == NULL) {
2847                 TALLOC_FREE(req);
2848                 return NULL;
2849         }
2850
2851         flags |= additional_flags;
2852         flags &= ~clear_flags;
2853
2854         state->smb2.fixed = fixed;
2855         state->smb2.fixed_len = fixed_len;
2856         state->smb2.dyn = dyn;
2857         state->smb2.dyn_len = dyn_len;
2858         state->smb2.max_dyn_len = max_dyn_len;
2859
2860         if (state->smb2.should_encrypt) {
2861                 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2862                 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2863         }
2864
2865         SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID,    SMB2_MAGIC);
2866         SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH,         SMB2_HDR_BODY);
2867         SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE,         cmd);
2868         SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2869         SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS,          flags);
2870         SIVAL(state->smb2.hdr, SMB2_HDR_PID,            0); /* reserved */
2871         SIVAL(state->smb2.hdr, SMB2_HDR_TID,            tid);
2872         SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID,     uid);
2873
2874         switch (cmd) {
2875         case SMB2_OP_CANCEL:
2876                 state->one_way = true;
2877                 break;
2878         case SMB2_OP_BREAK:
2879                 /*
2880                  * If this is a dummy request, it will have
2881                  * UINT64_MAX as message id.
2882                  * If we send on break acknowledgement,
2883                  * this gets overwritten later.
2884                  */
2885                 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2886                 break;
2887         }
2888
2889         if (timeout_msec > 0) {
2890                 struct timeval endtime;
2891
2892                 endtime = timeval_current_ofs_msec(timeout_msec);
2893                 if (!tevent_req_set_endtime(req, ev, endtime)) {
2894                         return req;
2895                 }
2896         }
2897
2898         return req;
2899 }
2900
2901 void smb2cli_req_set_notify_async(struct tevent_req *req)
2902 {
2903         struct smbXcli_req_state *state =
2904                 tevent_req_data(req,
2905                 struct smbXcli_req_state);
2906
2907         state->smb2.notify_async = true;
2908 }
2909
2910 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2911 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2912                                                TALLOC_CTX *tmp_mem,
2913                                                uint8_t *inbuf);
2914
2915 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2916                                      int num_reqs)
2917 {
2918         struct smbXcli_req_state *state;
2919         struct tevent_req *subreq;
2920         struct iovec *iov;
2921         int i, num_iov, nbt_len;
2922         int tf_iov = -1;
2923         const DATA_BLOB *encryption_key = NULL;
2924         uint64_t encryption_session_id = 0;
2925         uint64_t nonce_high = UINT64_MAX;
2926         uint64_t nonce_low = UINT64_MAX;
2927
2928         /*
2929          * 1 for the nbt length, optional TRANSFORM
2930          * per request: HDR, fixed, dyn, padding
2931          * -1 because the last one does not need padding
2932          */
2933
2934         iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2935         if (iov == NULL) {
2936                 return NT_STATUS_NO_MEMORY;
2937         }
2938
2939         num_iov = 1;
2940         nbt_len = 0;
2941
2942         /*
2943          * the session of the first request that requires encryption
2944          * specifies the encryption key.
2945          */
2946         for (i=0; i<num_reqs; i++) {
2947                 if (!tevent_req_is_in_progress(reqs[i])) {
2948                         return NT_STATUS_INTERNAL_ERROR;
2949                 }
2950
2951                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2952
2953                 if (!smbXcli_conn_is_connected(state->conn)) {
2954                         return NT_STATUS_CONNECTION_DISCONNECTED;
2955                 }
2956
2957                 if ((state->conn->protocol != PROTOCOL_NONE) &&
2958                     (state->conn->protocol < PROTOCOL_SMB2_02)) {
2959                         return NT_STATUS_REVISION_MISMATCH;
2960                 }
2961
2962                 if (state->session == NULL) {
2963                         continue;
2964                 }
2965
2966                 if (!state->smb2.should_encrypt) {
2967                         continue;
2968                 }
2969
2970                 encryption_key = &state->session->smb2->encryption_key;
2971                 if (encryption_key->length == 0) {
2972                         return NT_STATUS_INVALID_PARAMETER_MIX;
2973                 }
2974
2975                 encryption_session_id = state->session->smb2->session_id;
2976
2977                 state->session->smb2->nonce_low += 1;
2978                 if (state->session->smb2->nonce_low == 0) {
2979                         state->session->smb2->nonce_high += 1;
2980                         state->session->smb2->nonce_low += 1;
2981                 }
2982
2983                 /*
2984                  * CCM and GCM algorithms must never have their
2985                  * nonce wrap, or the security of the whole
2986                  * communication and the keys is destroyed.
2987                  * We must drop the connection once we have
2988                  * transfered too much data.
2989                  *
2990                  * NOTE: We assume nonces greater than 8 bytes.
2991                  */
2992                 if (state->session->smb2->nonce_high >=
2993                     state->session->smb2->nonce_high_max)
2994                 {
2995                         return NT_STATUS_ENCRYPTION_FAILED;
2996                 }
2997
2998                 nonce_high = state->session->smb2->nonce_high_random;
2999                 nonce_high += state->session->smb2->nonce_high;
3000                 nonce_low = state->session->smb2->nonce_low;
3001
3002                 tf_iov = num_iov;
3003                 iov[num_iov].iov_base = state->smb2.transform;
3004                 iov[num_iov].iov_len  = sizeof(state->smb2.transform);
3005                 num_iov += 1;
3006
3007                 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
3008                 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
3009                       nonce_low);
3010                 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
3011                       nonce_high);
3012                 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
3013                       encryption_session_id);
3014
3015                 nbt_len += SMB2_TF_HDR_SIZE;
3016                 break;
3017         }
3018
3019         for (i=0; i<num_reqs; i++) {
3020                 int hdr_iov;
3021                 size_t reqlen;
3022                 bool ret;
3023                 uint16_t opcode;
3024                 uint64_t avail;
3025                 uint16_t charge;
3026                 uint16_t credits;
3027                 uint64_t mid;
3028                 const DATA_BLOB *signing_key = NULL;
3029
3030                 if (!tevent_req_is_in_progress(reqs[i])) {
3031                         return NT_STATUS_INTERNAL_ERROR;
3032                 }
3033
3034                 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
3035
3036                 if (!smbXcli_conn_is_connected(state->conn)) {
3037                         return NT_STATUS_CONNECTION_DISCONNECTED;
3038                 }
3039
3040                 if ((state->conn->protocol != PROTOCOL_NONE) &&
3041                     (state->conn->protocol < PROTOCOL_SMB2_02)) {
3042                         return NT_STATUS_REVISION_MISMATCH;
3043                 }
3044
3045                 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3046                 if (opcode == SMB2_OP_CANCEL) {
3047                         goto skip_credits;
3048                 }
3049
3050                 avail = UINT64_MAX - state->conn->smb2.mid;
3051                 if (avail < 1) {
3052                         return NT_STATUS_CONNECTION_ABORTED;
3053                 }
3054
3055                 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3056                         uint32_t max_dyn_len = 1;
3057
3058                         max_dyn_len = MAX(max_dyn_len, state->smb2.dyn_len);
3059                         max_dyn_len = MAX(max_dyn_len, state->smb2.max_dyn_len);
3060
3061                         charge = (max_dyn_len - 1)/ 65536 + 1;
3062                 } else {
3063                         charge = 1;
3064                 }
3065
3066                 charge = MAX(state->smb2.credit_charge, charge);
3067
3068                 avail = MIN(avail, state->conn->smb2.cur_credits);
3069                 if (avail < charge) {
3070                         return NT_STATUS_INTERNAL_ERROR;
3071                 }
3072
3073                 credits = 0;
3074                 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
3075                         credits = state->conn->smb2.max_credits -
3076                                   state->conn->smb2.cur_credits;
3077                 }
3078                 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
3079                         credits += 1;
3080                 }
3081
3082                 mid = state->conn->smb2.mid;
3083                 state->conn->smb2.mid += charge;
3084                 state->conn->smb2.cur_credits -= charge;
3085
3086                 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
3087                         SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
3088                 }
3089                 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
3090                 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
3091
3092                 state->smb2.cancel_flags = 0;
3093                 state->smb2.cancel_mid = mid;
3094                 state->smb2.cancel_aid = 0;
3095
3096 skip_credits:
3097                 if (state->session && encryption_key == NULL) {
3098                         /*
3099                          * We prefer the channel signing key if it is
3100                          * already there.
3101                          */
3102                         if (state->smb2.should_sign) {
3103                                 signing_key = &state->session->smb2_channel.signing_key;
3104                         }
3105
3106                         /*
3107                          * If it is a channel binding, we already have the main
3108                          * signing key and try that one.
3109                          */
3110                         if (signing_key && signing_key->length == 0) {
3111                                 signing_key = &state->session->smb2->signing_key;
3112                         }
3113
3114                         /*
3115                          * If we do not have any session key yet, we skip the
3116                          * signing of SMB2_OP_SESSSETUP requests.
3117                          */
3118                         if (signing_key && signing_key->length == 0) {
3119                                 signing_key = NULL;
3120                         }
3121                 }
3122
3123                 hdr_iov = num_iov;
3124                 iov[num_iov].iov_base = state->smb2.hdr;
3125                 iov[num_iov].iov_len  = sizeof(state->smb2.hdr);
3126                 num_iov += 1;
3127
3128                 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
3129                 iov[num_iov].iov_len  = state->smb2.fixed_len;
3130                 num_iov += 1;
3131
3132                 if (state->smb2.dyn != NULL) {
3133                         iov[num_iov].iov_base = discard_const(state->smb2.dyn);
3134                         iov[num_iov].iov_len  = state->smb2.dyn_len;
3135                         num_iov += 1;
3136                 }
3137
3138                 reqlen  = sizeof(state->smb2.hdr);
3139                 reqlen += state->smb2.fixed_len;
3140                 reqlen += state->smb2.dyn_len;
3141
3142                 if (i < num_reqs-1) {
3143                         if ((reqlen % 8) > 0) {
3144                                 uint8_t pad = 8 - (reqlen % 8);
3145                                 iov[num_iov].iov_base = state->smb2.pad;
3146                                 iov[num_iov].iov_len = pad;
3147                                 num_iov += 1;
3148                                 reqlen += pad;
3149                         }
3150                         SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
3151                 }
3152
3153                 state->smb2.encryption_session_id = encryption_session_id;
3154
3155                 if (signing_key != NULL) {
3156                         NTSTATUS status;
3157
3158                         status = smb2_signing_sign_pdu(*signing_key,
3159                                                        state->session->conn->protocol,
3160                                                        &iov[hdr_iov], num_iov - hdr_iov);
3161                         if (!NT_STATUS_IS_OK(status)) {
3162                                 return status;
3163                         }
3164                 }
3165
3166                 nbt_len += reqlen;
3167
3168                 ret = smbXcli_req_set_pending(reqs[i]);
3169                 if (!ret) {
3170                         return NT_STATUS_NO_MEMORY;
3171                 }
3172         }
3173
3174         state = tevent_req_data(reqs[0], struct smbXcli_req_state);
3175         _smb_setlen_tcp(state->length_hdr, nbt_len);
3176         iov[0].iov_base = state->length_hdr;
3177         iov[0].iov_len  = sizeof(state->length_hdr);
3178
3179         if (encryption_key != NULL) {
3180                 NTSTATUS status;
3181                 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
3182                 uint8_t *buf;
3183                 int vi;
3184
3185                 buf = talloc_array(iov, uint8_t, buflen);
3186                 if (buf == NULL) {
3187                         return NT_STATUS_NO_MEMORY;
3188                 }
3189
3190                 /*
3191                  * We copy the buffers before encrypting them,
3192                  * this is at least currently needed for the
3193                  * to keep state->smb2.hdr.
3194                  *
3195                  * Also the callers may expect there buffers
3196                  * to be const.
3197                  */
3198                 for (vi = tf_iov + 1; vi < num_iov; vi++) {
3199                         struct iovec *v = &iov[vi];
3200                         const uint8_t *o = (const uint8_t *)v->iov_base;
3201
3202                         memcpy(buf, o, v->iov_len);
3203                         v->iov_base = (void *)buf;
3204                         buf += v->iov_len;
3205                 }
3206
3207                 status = smb2_signing_encrypt_pdu(*encryption_key,
3208                                         state->conn->smb2.server.cipher,
3209                                         &iov[tf_iov], num_iov - tf_iov);
3210                 if (!NT_STATUS_IS_OK(status)) {
3211                         return status;
3212                 }
3213         }
3214
3215         if (state->conn->dispatch_incoming == NULL) {
3216                 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
3217         }
3218
3219         subreq = writev_send(state, state->ev, state->conn->outgoing,
3220                              state->conn->sock_fd, false, iov, num_iov);
3221         if (subreq == NULL) {
3222                 return NT_STATUS_NO_MEMORY;
3223         }
3224         tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
3225         state->write_req = subreq;
3226
3227         return NT_STATUS_OK;
3228 }
3229
3230 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
3231 {
3232         struct smbXcli_req_state *state =
3233                 tevent_req_data(req,
3234                 struct smbXcli_req_state);
3235
3236         state->smb2.credit_charge = charge;
3237 }
3238
3239 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
3240                                     struct tevent_context *ev,
3241                                     struct smbXcli_conn *conn,
3242                                     uint16_t cmd,
3243                                     uint32_t additional_flags,
3244                                     uint32_t clear_flags,
3245                                     uint32_t timeout_msec,
3246                                     struct smbXcli_tcon *tcon,
3247                                     struct smbXcli_session *session,
3248                                     const uint8_t *fixed,
3249                                     uint16_t fixed_len,
3250                                     const uint8_t *dyn,
3251                                     uint32_t dyn_len,
3252                                     uint32_t max_dyn_len)
3253 {
3254         struct tevent_req *req;
3255         NTSTATUS status;
3256
3257         req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
3258                                  additional_flags, clear_flags,
3259                                  timeout_msec,
3260                                  tcon, session,
3261                                  fixed, fixed_len,
3262                                  dyn, dyn_len,
3263                                  max_dyn_len);
3264         if (req == NULL) {
3265                 return NULL;
3266         }
3267         if (!tevent_req_is_in_progress(req)) {
3268                 return tevent_req_post(req, ev);
3269         }
3270         status = smb2cli_req_compound_submit(&req, 1);
3271         if (tevent_req_nterror(req, status)) {
3272                 return tevent_req_post(req, ev);
3273         }
3274         return req;
3275 }
3276
3277 static void smb2cli_req_writev_done(struct tevent_req *subreq)
3278 {
3279         struct tevent_req *req =
3280                 tevent_req_callback_data(subreq,
3281                 struct tevent_req);
3282         struct smbXcli_req_state *state =
3283                 tevent_req_data(req,
3284                 struct smbXcli_req_state);
3285         ssize_t nwritten;
3286         int err;
3287
3288         state->write_req = NULL;
3289
3290         nwritten = writev_recv(subreq, &err);
3291         TALLOC_FREE(subreq);
3292         if (nwritten == -1) {
3293                 /* here, we need to notify all pending requests */
3294                 NTSTATUS status = map_nt_error_from_unix_common(err);
3295                 smbXcli_conn_disconnect(state->conn, status);
3296                 return;
3297         }
3298 }
3299
3300 static struct smbXcli_session* smbXcli_session_by_uid(struct smbXcli_conn *conn,
3301                                                      uint64_t uid)
3302 {
3303         struct smbXcli_session *s = conn->sessions;
3304
3305         for (; s; s = s->next) {
3306                 if (s->smb2->session_id != uid) {
3307                         continue;
3308                 }
3309                 break;
3310         }
3311
3312         return s;
3313 }
3314
3315 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3316                                              uint8_t *buf,
3317                                              size_t buflen,
3318                                              TALLOC_CTX *mem_ctx,
3319                                              struct iovec **piov, int *pnum_iov)
3320 {
3321         struct iovec *iov;
3322         int num_iov = 0;
3323         size_t taken = 0;
3324         uint8_t *first_hdr = buf;
3325         size_t verified_buflen = 0;
3326         uint8_t *tf = NULL;
3327         size_t tf_len = 0;
3328
3329         iov = talloc_array(mem_ctx, struct iovec, num_iov);
3330         if (iov == NULL) {
3331                 return NT_STATUS_NO_MEMORY;
3332         }
3333
3334         while (taken < buflen) {
3335                 size_t len = buflen - taken;
3336                 uint8_t *hdr = first_hdr + taken;
3337                 struct iovec *cur;
3338                 size_t full_size;
3339                 size_t next_command_ofs;
3340                 uint16_t body_size;
3341                 struct iovec *iov_tmp;
3342
3343                 if (verified_buflen > taken) {
3344                         len = verified_buflen - taken;
3345                 } else {
3346                         tf = NULL;
3347                         tf_len = 0;
3348                 }
3349
3350                 if (len < 4) {
3351                         DEBUG(10, ("%d bytes left, expected at least %d\n",
3352                                    (int)len, 4));
3353                         goto inval;
3354                 }
3355                 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3356                         struct smbXcli_session *s;
3357                         uint64_t uid;
3358                         struct iovec tf_iov[2];
3359                         size_t enc_len;
3360                         NTSTATUS status;
3361
3362                         if (len < SMB2_TF_HDR_SIZE) {
3363                                 DEBUG(10, ("%d bytes left, expected at least %d\n",
3364                                            (int)len, SMB2_TF_HDR_SIZE));
3365                                 goto inval;
3366                         }
3367                         tf = hdr;
3368                         tf_len = SMB2_TF_HDR_SIZE;
3369                         taken += tf_len;
3370
3371                         hdr = first_hdr + taken;
3372                         enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3373                         uid = BVAL(tf, SMB2_TF_SESSION_ID);
3374
3375                         if (len < SMB2_TF_HDR_SIZE + enc_len) {
3376                                 DEBUG(10, ("%d bytes left, expected at least %d\n",
3377                                            (int)len,
3378                                            (int)(SMB2_TF_HDR_SIZE + enc_len)));
3379                                 goto inval;
3380                         }
3381
3382                         s = smbXcli_session_by_uid(conn, uid);
3383                         if (s == NULL) {
3384                                 DEBUG(10, ("unknown session_id %llu\n",
3385                                            (unsigned long long)uid));
3386                                 goto inval;
3387                         }
3388
3389                         tf_iov[0].iov_base = (void *)tf;
3390                         tf_iov[0].iov_len = tf_len;
3391                         tf_iov[1].iov_base = (void *)hdr;
3392                         tf_iov[1].iov_len = enc_len;
3393
3394                         status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3395                                                           conn->smb2.server.cipher,
3396                                                           tf_iov, 2);
3397                         if (!NT_STATUS_IS_OK(status)) {
3398                                 TALLOC_FREE(iov);
3399                                 return status;
3400                         }
3401
3402                         verified_buflen = taken + enc_len;
3403                         len = enc_len;
3404                 }
3405
3406                 /*
3407                  * We need the header plus the body length field
3408                  */
3409
3410                 if (len < SMB2_HDR_BODY + 2) {
3411                         DEBUG(10, ("%d bytes left, expected at least %d\n",
3412                                    (int)len, SMB2_HDR_BODY));
3413                         goto inval;
3414                 }
3415                 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3416                         DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3417                                    IVAL(hdr, 0)));
3418                         goto inval;
3419                 }
3420                 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3421                         DEBUG(10, ("Got HDR len %d, expected %d\n",
3422                                    SVAL(hdr, 4), SMB2_HDR_BODY));
3423                         goto inval;
3424                 }
3425
3426                 full_size = len;
3427                 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3428                 body_size = SVAL(hdr, SMB2_HDR_BODY);
3429
3430                 if (next_command_ofs != 0) {
3431                         if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3432                                 goto inval;
3433                         }
3434                         if (next_command_ofs > full_size) {
3435                                 goto inval;
3436                         }
3437                         full_size = next_command_ofs;
3438                 }
3439                 if (body_size < 2) {
3440                         goto inval;
3441                 }
3442                 body_size &= 0xfffe;
3443
3444                 if (body_size > (full_size - SMB2_HDR_BODY)) {
3445                         goto inval;
3446                 }
3447
3448                 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3449                                          num_iov + 4);
3450                 if (iov_tmp == NULL) {
3451                         TALLOC_FREE(iov);
3452                         return NT_STATUS_NO_MEMORY;
3453                 }
3454                 iov = iov_tmp;
3455                 cur = &iov[num_iov];
3456                 num_iov += 4;
3457
3458                 cur[0].iov_base = tf;
3459                 cur[0].iov_len  = tf_len;
3460                 cur[1].iov_base = hdr;
3461                 cur[1].iov_len  = SMB2_HDR_BODY;
3462                 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3463                 cur[2].iov_len  = body_size;
3464                 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3465                 cur[3].iov_len  = full_size - (SMB2_HDR_BODY + body_size);
3466
3467                 taken += full_size;
3468         }
3469
3470         *piov = iov;
3471         *pnum_iov = num_iov;
3472         return NT_STATUS_OK;
3473
3474 inval:
3475         TALLOC_FREE(iov);
3476         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3477 }
3478
3479 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3480                                                     uint64_t mid)
3481 {
3482         size_t num_pending = talloc_array_length(conn->pending);
3483         size_t i;
3484
3485         for (i=0; i<num_pending; i++) {
3486                 struct tevent_req *req = conn->pending[i];
3487                 struct smbXcli_req_state *state =
3488                         tevent_req_data(req,
3489                         struct smbXcli_req_state);
3490
3491                 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3492                         return req;
3493                 }
3494         }
3495         return NULL;
3496 }
3497
3498 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3499                                                TALLOC_CTX *tmp_mem,
3500                                                uint8_t *inbuf)
3501 {
3502         struct tevent_req *req;
3503         struct smbXcli_req_state *state = NULL;
3504         struct iovec *iov;
3505         int i, num_iov;
3506         NTSTATUS status;
3507         bool defer = true;
3508         struct smbXcli_session *last_session = NULL;
3509         size_t inbuf_len = smb_len_tcp(inbuf);
3510
3511         status = smb2cli_inbuf_parse_compound(conn,
3512                                               inbuf + NBT_HDR_SIZE,
3513                                               inbuf_len,
3514                                               tmp_mem,
3515                                               &iov, &num_iov);
3516         if (!NT_STATUS_IS_OK(status)) {
3517                 return status;
3518         }
3519
3520         for (i=0; i<num_iov; i+=4) {
3521                 uint8_t *inbuf_ref = NULL;
3522                 struct iovec *cur = &iov[i];
3523                 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3524                 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3525                 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3526                 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3527                 uint16_t req_opcode;
3528                 uint32_t req_flags;
3529                 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3530                 uint32_t new_credits;
3531                 struct smbXcli_session *session = NULL;
3532                 const DATA_BLOB *signing_key = NULL;
3533                 bool was_encrypted = false;
3534
3535                 new_credits = conn->smb2.cur_credits;
3536                 new_credits += credits;
3537                 if (new_credits > UINT16_MAX) {
3538                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3539                 }
3540                 conn->smb2.cur_credits += credits;
3541
3542                 req = smb2cli_conn_find_pending(conn, mid);
3543                 if (req == NULL) {
3544                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3545                 }
3546                 state = tevent_req_data(req, struct smbXcli_req_state);
3547
3548                 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3549                 if (opcode != req_opcode) {
3550                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3551                 }
3552                 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3553
3554                 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3555                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
3556                 }
3557
3558                 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3559                 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3560                     NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3561                         uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3562
3563                         if (state->smb2.got_async) {
3564                                 /* We only expect one STATUS_PENDING response */
3565                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3566                         }
3567                         state->smb2.got_async = true;
3568
3569                         /*
3570                          * async interim responses are not signed,
3571                          * even if the SMB2_HDR_FLAG_SIGNED flag
3572                          * is set.
3573                          */
3574                         state->smb2.cancel_flags = SMB2_HDR_FLAG_ASYNC;
3575                         state->smb2.cancel_mid = 0;
3576                         state->smb2.cancel_aid = async_id;
3577
3578                         if (state->smb2.notify_async) {
3579                                 tevent_req_defer_callback(req, state->ev);
3580                                 tevent_req_notify_callback(req);
3581                         }
3582                         continue;
3583                 }
3584
3585                 session = state->session;
3586                 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3587                         session = last_session;
3588                 }
3589                 last_session = session;
3590
3591                 if (state->smb2.should_sign) {
3592                         if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3593                                 return NT_STATUS_ACCESS_DENIED;
3594                         }
3595                 }
3596
3597                 if (flags & SMB2_HDR_FLAG_SIGNED) {
3598                         uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3599
3600                         if (session == NULL) {
3601                                 session = smbXcli_session_by_uid(state->conn,
3602                                                                  uid);
3603                         }
3604
3605                         if (session == NULL) {
3606                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3607                         }
3608
3609                         last_session = session;
3610                         signing_key = &session->smb2_channel.signing_key;
3611                 }
3612
3613                 if (opcode == SMB2_OP_SESSSETUP) {
3614                         /*
3615                          * We prefer the channel signing key, if it is
3616                          * already there.
3617                          *
3618                          * If we do not have a channel signing key yet,
3619                          * we try the main signing key, if it is not
3620                          * the final response.
3621                          */
3622                         if (signing_key && signing_key->length == 0 &&
3623                             !NT_STATUS_IS_OK(status)) {
3624                                 signing_key = &session->smb2->signing_key;
3625                         }
3626
3627                         if (signing_key && signing_key->length == 0) {
3628                                 /*
3629                                  * If we do not have a session key to
3630                                  * verify the signature, we defer the
3631                                  * signing check to the caller.
3632                                  *
3633                                  * The caller gets NT_STATUS_OK, it
3634                                  * has to call
3635                                  * smb2cli_session_set_session_key()
3636                                  * or
3637                                  * smb2cli_session_set_channel_key()
3638                                  * which will check the signature
3639                                  * with the channel signing key.
3640                                  */
3641                                 signing_key = NULL;
3642                         }
3643                 }
3644
3645                 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3646                         const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3647                         uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3648
3649                         /*
3650                          * If the response was encrypted in a SMB2_TRANSFORM
3651                          * pdu, which belongs to the correct session,
3652                          * we do not need to do signing checks
3653                          *
3654                          * It could be the session the response belongs to
3655                          * or the session that was used to encrypt the
3656                          * SMB2_TRANSFORM request.
3657                          */
3658                         if ((session && session->smb2->session_id == uid) ||
3659                             (state->smb2.encryption_session_id == uid)) {
3660                                 signing_key = NULL;
3661                                 was_encrypted = true;
3662                         }
3663                 }
3664
3665                 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3666                         /*
3667                          * if the server returns NT_STATUS_USER_SESSION_DELETED
3668                          * the response is not signed and we should
3669                          * propagate the NT_STATUS_USER_SESSION_DELETED
3670                          * status to the caller.
3671                          */
3672                         state->smb2.signing_skipped = true;
3673                         signing_key = NULL;
3674                 }
3675
3676                 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3677                         /*
3678                          * if the server returns
3679                          * NT_STATUS_INVALID_PARAMETER
3680                          * the response might not be encrypted.
3681                          */
3682                         if (state->smb2.should_encrypt && !was_encrypted) {
3683                                 state->smb2.signing_skipped = true;
3684                                 signing_key = NULL;
3685                         }
3686                 }
3687
3688                 if (state->smb2.should_encrypt && !was_encrypted) {
3689                         if (!state->smb2.signing_skipped) {
3690                                 return NT_STATUS_ACCESS_DENIED;
3691                         }
3692                 }
3693
3694                 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3695                     NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3696                     NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3697                         /*
3698                          * if the server returns
3699                          * NT_STATUS_NETWORK_NAME_DELETED
3700                          * NT_STATUS_FILE_CLOSED
3701                          * NT_STATUS_INVALID_PARAMETER
3702                          * the response might not be signed
3703                          * as this happens before the signing checks.
3704                          *
3705                          * If server echos the signature (or all zeros)
3706                          * we should report the status from the server
3707                          * to the caller.
3708                          */
3709                         if (signing_key) {
3710                                 int cmp;
3711
3712                                 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3713                                              state->smb2.hdr+SMB2_HDR_SIGNATURE,
3714                                              16);
3715                                 if (cmp == 0) {
3716                                         state->smb2.signing_skipped = true;
3717                                         signing_key = NULL;
3718                                 }
3719                         }
3720                         if (signing_key) {
3721                                 int cmp;
3722                                 static const uint8_t zeros[16];
3723
3724                                 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3725                                              zeros,
3726                                              16);
3727                                 if (cmp == 0) {
3728                                         state->smb2.signing_skipped = true;
3729                                         signing_key = NULL;
3730                                 }
3731                         }
3732                 }
3733
3734                 if (signing_key) {
3735                         status = smb2_signing_check_pdu(*signing_key,
3736                                                         state->conn->protocol,
3737                                                         &cur[1], 3);
3738                         if (!NT_STATUS_IS_OK(status)) {
3739                                 /*
3740                                  * If the signing check fails, we disconnect
3741                                  * the connection.
3742                                  */
3743                                 return status;
3744                         }
3745                 }
3746
3747                 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3748                     (session != NULL) && session->disconnect_expired)
3749                 {
3750                         /*
3751                          * this should be a short term hack
3752                          * until the upper layers have implemented
3753                          * re-authentication.
3754                          */
3755                         return status;
3756                 }
3757
3758                 smbXcli_req_unset_pending(req);
3759
3760                 /*
3761                  * There might be more than one response
3762                  * we need to defer the notifications
3763                  */
3764                 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3765                         defer = false;
3766                 }
3767
3768                 if (defer) {
3769                         tevent_req_defer_callback(req, state->ev);
3770                 }
3771
3772                 /*
3773                  * Note: here we use talloc_reference() in a way
3774                  *       that does not expose it to the caller.
3775                  */
3776                 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3777                 if (tevent_req_nomem(inbuf_ref, req)) {
3778                         continue;
3779                 }
3780
3781                 /* copy the related buffers */
3782                 state->smb2.recv_iov[0] = cur[1];
3783                 state->smb2.recv_iov[1] = cur[2];
3784                 state->smb2.recv_iov[2] = cur[3];
3785
3786                 tevent_req_done(req);
3787         }
3788
3789         if (defer) {
3790                 return NT_STATUS_RETRY;
3791         }
3792
3793         return NT_STATUS_OK;
3794 }
3795
3796 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3797                           struct iovec **piov,
3798                           const struct smb2cli_req_expected_response *expected,
3799                           size_t num_expected)
3800 {
3801         struct smbXcli_req_state *state =
3802                 tevent_req_data(req,
3803                 struct smbXcli_req_state);
3804         NTSTATUS status;
3805         size_t body_size;
3806         bool found_status = false;
3807         bool found_size = false;
3808         size_t i;
3809
3810         if (piov != NULL) {
3811                 *piov = NULL;
3812         }
3813
3814         if (tevent_req_is_in_progress(req) && state->smb2.got_async) {
3815                 return STATUS_PENDING;
3816         }
3817
3818         if (tevent_req_is_nterror(req, &status)) {
3819                 for (i=0; i < num_expected; i++) {
3820                         if (NT_STATUS_EQUAL(status, expected[i].status)) {
3821                                 found_status = true;
3822                                 break;
3823                         }
3824                 }
3825
3826                 if (found_status) {
3827                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3828                 }
3829
3830                 return status;
3831         }
3832
3833         if (num_expected == 0) {
3834                 found_status = true;
3835                 found_size = true;
3836         }
3837
3838         status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3839         body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3840
3841         for (i=0; i < num_expected; i++) {
3842                 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3843                         continue;
3844                 }
3845
3846                 found_status = true;
3847                 if (expected[i].body_size == 0) {
3848                         found_size = true;
3849                         break;
3850                 }
3851
3852                 if (expected[i].body_size == body_size) {
3853                         found_size = true;
3854                         break;
3855                 }
3856         }
3857
3858         if (!found_status) {
3859                 return status;
3860         }
3861
3862         if (state->smb2.signing_skipped) {
3863                 if (num_expected > 0) {
3864                         return NT_STATUS_ACCESS_DENIED;
3865                 }
3866                 if (!NT_STATUS_IS_ERR(status)) {
3867                         return NT_STATUS_ACCESS_DENIED;
3868                 }
3869         }
3870
3871         if (!found_size) {
3872                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3873         }
3874
3875         if (piov != NULL) {
3876                 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3877         }
3878
3879         return status;
3880 }
3881
3882 NTSTATUS smb2cli_req_get_sent_iov(struct tevent_req *req,
3883                                   struct iovec *sent_iov)
3884 {
3885         struct smbXcli_req_state *state =
3886                 tevent_req_data(req,
3887                 struct smbXcli_req_state);
3888
3889         if (tevent_req_is_in_progress(req)) {
3890                 return STATUS_PENDING;
3891         }
3892
3893         sent_iov[0].iov_base = state->smb2.hdr;
3894         sent_iov[0].iov_len  = sizeof(state->smb2.hdr);
3895
3896         sent_iov[1].iov_base = discard_const(state->smb2.fixed);
3897         sent_iov[1].iov_len  = state->smb2.fixed_len;
3898
3899         if (state->smb2.dyn != NULL) {
3900                 sent_iov[2].iov_base = discard_const(state->smb2.dyn);
3901                 sent_iov[2].iov_len  = state->smb2.dyn_len;
3902         } else {
3903                 sent_iov[2].iov_base = NULL;
3904                 sent_iov[2].iov_len  = 0;
3905         }
3906
3907         return NT_STATUS_OK;
3908 }
3909
3910 static const struct {
3911         enum protocol_types proto;
3912         const char *smb1_name;
3913 } smb1cli_prots[] = {
3914         {PROTOCOL_CORE,         "PC NETWORK PROGRAM 1.0"},
3915         {PROTOCOL_COREPLUS,     "MICROSOFT NETWORKS 1.03"},
3916         {PROTOCOL_LANMAN1,      "MICROSOFT NETWORKS 3.0"},
3917         {PROTOCOL_LANMAN1,      "LANMAN1.0"},
3918         {PROTOCOL_LANMAN2,      "LM1.2X002"},
3919         {PROTOCOL_LANMAN2,      "DOS LANMAN2.1"},
3920         {PROTOCOL_LANMAN2,      "LANMAN2.1"},
3921         {PROTOCOL_LANMAN2,      "Samba"},
3922         {PROTOCOL_NT1,          "NT LANMAN 1.0"},
3923         {PROTOCOL_NT1,          "NT LM 0.12"},
3924         {PROTOCOL_SMB2_02,      "SMB 2.002"},
3925         {PROTOCOL_SMB2_10,      "SMB 2.???"},
3926 };
3927
3928 static const struct {
3929         enum protocol_types proto;
3930         uint16_t smb2_dialect;
3931 } smb2cli_prots[] = {
3932         {PROTOCOL_SMB2_02,      SMB2_DIALECT_REVISION_202},
3933         {PROTOCOL_SMB2_10,      SMB2_DIALECT_REVISION_210},
3934         {PROTOCOL_SMB2_22,      SMB2_DIALECT_REVISION_222},
3935         {PROTOCOL_SMB2_24,      SMB2_DIALECT_REVISION_224},
3936         {PROTOCOL_SMB3_00,      SMB3_DIALECT_REVISION_300},
3937         {PROTOCOL_SMB3_02,      SMB3_DIALECT_REVISION_302},
3938         {PROTOCOL_SMB3_10,      SMB3_DIALECT_REVISION_310},
3939         {PROTOCOL_SMB3_11,      SMB3_DIALECT_REVISION_311},
3940 };
3941
3942 struct smbXcli_negprot_state {
3943         struct smbXcli_conn *conn;
3944         struct tevent_context *ev;
3945         uint32_t timeout_msec;
3946
3947         struct {
3948                 uint8_t fixed[36];
3949         } smb2;
3950 };
3951
3952 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3953 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3954 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3955 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3956 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3957 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3958                                                   TALLOC_CTX *frame,
3959                                                   uint8_t *inbuf);
3960
3961 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,
3962                                         struct tevent_context *ev,
3963                                         struct smbXcli_conn *conn,
3964                                         uint32_t timeout_msec,
3965                                         enum protocol_types min_protocol,
3966                                         enum protocol_types max_protocol)
3967 {
3968         struct tevent_req *req, *subreq;
3969         struct smbXcli_negprot_state *state;
3970
3971         req = tevent_req_create(mem_ctx, &state,
3972                                 struct smbXcli_negprot_state);
3973         if (req == NULL) {
3974                 return NULL;
3975         }
3976         state->conn = conn;
3977         state->ev = ev;
3978         state->timeout_msec = timeout_msec;
3979
3980         if (min_protocol == PROTOCOL_NONE) {
3981                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3982                 return tevent_req_post(req, ev);
3983         }
3984
3985         if (max_protocol == PROTOCOL_NONE) {
3986                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3987                 return tevent_req_post(req, ev);
3988         }
3989
3990         if (min_protocol > max_protocol) {
3991                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
3992                 return tevent_req_post(req, ev);
3993         }
3994
3995         conn->min_protocol = min_protocol;
3996         conn->max_protocol = max_protocol;
3997         conn->protocol = PROTOCOL_NONE;
3998
3999         if ((min_protocol < PROTOCOL_SMB2_02) &&
4000             (max_protocol < PROTOCOL_SMB2_02)) {
4001                 /*
4002                  * SMB1 only...
4003                  */
4004                 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4005
4006                 subreq = smbXcli_negprot_smb1_subreq(state);
4007                 if (tevent_req_nomem(subreq, req)) {
4008                         return tevent_req_post(req, ev);
4009                 }
4010                 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4011                 return req;
4012         }
4013
4014         if ((min_protocol >= PROTOCOL_SMB2_02) &&
4015             (max_protocol >= PROTOCOL_SMB2_02)) {
4016                 /*
4017                  * SMB2 only...
4018                  */
4019                 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4020
4021                 /*
4022                  * As we're starting with an SMB2 negprot, emulate Windows
4023                  * and ask for 31 credits in the initial SMB2 negprot.
4024                  * If we don't and leave requested credits at
4025                  * zero, MacOSX servers return zero credits on
4026                  * the negprot reply and we fail to connect.
4027                  */
4028                 smb2cli_conn_set_max_credits(conn,
4029                         WINDOWS_CLIENT_PURE_SMB2_NEGPROT_INITIAL_CREDIT_ASK);
4030
4031                 subreq = smbXcli_negprot_smb2_subreq(state);
4032                 if (tevent_req_nomem(subreq, req)) {
4033                         return tevent_req_post(req, ev);
4034                 }
4035                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4036                 return req;
4037         }
4038
4039         /*
4040          * We send an SMB1 negprot with the SMB2 dialects
4041          * and expect a SMB1 or a SMB2 response.
4042          *
4043          * smbXcli_negprot_dispatch_incoming() will fix the
4044          * callback to match protocol of the response.
4045          */
4046         conn->dispatch_incoming = smbXcli_negprot_dispatch_incoming;
4047
4048         subreq = smbXcli_negprot_smb1_subreq(state);
4049         if (tevent_req_nomem(subreq, req)) {
4050                 return tevent_req_post(req, ev);
4051         }
4052         tevent_req_set_callback(subreq, smbXcli_negprot_invalid_done, req);
4053         return req;
4054 }
4055
4056 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq)
4057 {
4058         struct tevent_req *req =
4059                 tevent_req_callback_data(subreq,
4060                 struct tevent_req);
4061         NTSTATUS status;
4062
4063         /*
4064          * we just want the low level error
4065          */
4066         status = tevent_req_simple_recv_ntstatus(subreq);
4067         TALLOC_FREE(subreq);
4068         if (tevent_req_nterror(req, status)) {
4069                 return;
4070         }
4071
4072         /* this should never happen */
4073         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
4074 }
4075
4076 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state)
4077 {
4078         size_t i;
4079         DATA_BLOB bytes = data_blob_null;
4080         uint8_t flags;
4081         uint16_t flags2;
4082
4083         /* setup the protocol strings */
4084         for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4085                 uint8_t c = 2;
4086                 bool ok;
4087
4088                 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4089                         continue;
4090                 }
4091
4092                 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4093                         continue;
4094                 }
4095
4096                 ok = data_blob_append(state, &bytes, &c, sizeof(c));
4097                 if (!ok) {
4098                         return NULL;
4099                 }
4100
4101                 /*
4102                  * We now it is already ascii and
4103                  * we want NULL termination.
4104                  */
4105                 ok = data_blob_append(state, &bytes,
4106                                       smb1cli_prots[i].smb1_name,
4107                                       strlen(smb1cli_prots[i].smb1_name)+1);
4108                 if (!ok) {
4109                         return NULL;
4110                 }
4111         }
4112
4113         smb1cli_req_flags(state->conn->max_protocol,
4114                           state->conn->smb1.client.capabilities,
4115                           SMBnegprot,
4116                           0, 0, &flags,
4117                           0, 0, &flags2);
4118
4119         return smb1cli_req_send(state, state->ev, state->conn,
4120                                 SMBnegprot,
4121                                 flags, ~flags,
4122                                 flags2, ~flags2,
4123                                 state->timeout_msec,
4124                                 0xFFFE, 0, NULL, /* pid, tid, session */
4125                                 0, NULL, /* wct, vwv */
4126                                 bytes.length, bytes.data);
4127 }
4128
4129 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq)
4130 {
4131         struct tevent_req *req =
4132                 tevent_req_callback_data(subreq,
4133                 struct tevent_req);
4134         struct smbXcli_negprot_state *state =
4135                 tevent_req_data(req,
4136                 struct smbXcli_negprot_state);
4137         struct smbXcli_conn *conn = state->conn;
4138         struct iovec *recv_iov = NULL;
4139         uint8_t *inhdr;
4140         uint8_t wct;
4141         uint16_t *vwv;
4142         uint32_t num_bytes;
4143         uint8_t *bytes;
4144         NTSTATUS status;
4145         uint16_t protnum;
4146         size_t i;
4147         size_t num_prots = 0;
4148         uint8_t flags;
4149         uint32_t client_capabilities = conn->smb1.client.capabilities;
4150         uint32_t both_capabilities;
4151         uint32_t server_capabilities = 0;
4152         uint32_t capabilities;
4153         uint32_t client_max_xmit = conn->smb1.client.max_xmit;
4154         uint32_t server_max_xmit = 0;
4155         uint32_t max_xmit;
4156         uint32_t server_max_mux = 0;
4157         uint16_t server_security_mode = 0;
4158         uint32_t server_session_key = 0;
4159         bool server_readbraw = false;
4160         bool server_writebraw = false;
4161         bool server_lockread = false;
4162         bool server_writeunlock = false;
4163         struct GUID server_guid = GUID_zero();
4164         DATA_BLOB server_gss_blob = data_blob_null;
4165         uint8_t server_challenge[8];
4166         char *server_workgroup = NULL;
4167         char *server_name = NULL;
4168         int server_time_zone = 0;
4169         NTTIME server_system_time = 0;
4170         static const struct smb1cli_req_expected_response expected[] = {
4171         {
4172                 .status = NT_STATUS_OK,
4173                 .wct = 0x11, /* NT1 */
4174         },
4175         {
4176                 .status = NT_STATUS_OK,
4177                 .wct = 0x0D, /* LM */
4178         },
4179         {
4180                 .status = NT_STATUS_OK,
4181                 .wct = 0x01, /* CORE */
4182         }
4183         };
4184
4185         ZERO_STRUCT(server_challenge);
4186
4187         status = smb1cli_req_recv(subreq, state,
4188                                   &recv_iov,
4189                                   &inhdr,
4190                                   &wct,
4191                                   &vwv,
4192                                   NULL, /* pvwv_offset */
4193                                   &num_bytes,
4194                                   &bytes,
4195                                   NULL, /* pbytes_offset */
4196                                   NULL, /* pinbuf */
4197                                   expected, ARRAY_SIZE(expected));
4198         TALLOC_FREE(subreq);
4199         if (tevent_req_nterror(req, status)) {
4200                 return;
4201         }
4202
4203         flags = CVAL(inhdr, HDR_FLG);
4204
4205         protnum = SVAL(vwv, 0);
4206
4207         for (i=0; i < ARRAY_SIZE(smb1cli_prots); i++) {
4208                 if (smb1cli_prots[i].proto < state->conn->min_protocol) {
4209                         continue;
4210                 }
4211
4212                 if (smb1cli_prots[i].proto > state->conn->max_protocol) {
4213                         continue;
4214                 }
4215
4216                 if (protnum != num_prots) {
4217                         num_prots++;
4218                         continue;
4219                 }
4220
4221                 conn->protocol = smb1cli_prots[i].proto;
4222                 break;
4223         }
4224
4225         if (conn->protocol == PROTOCOL_NONE) {
4226                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4227                 return;
4228         }
4229
4230         if ((conn->protocol < PROTOCOL_NT1) && conn->mandatory_signing) {
4231                 DEBUG(0,("smbXcli_negprot: SMB signing is mandatory "
4232                          "and the selected protocol level doesn't support it.\n"));
4233                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4234                 return;
4235         }
4236
4237         if (flags & FLAG_SUPPORT_LOCKREAD) {
4238                 server_lockread = true;
4239                 server_writeunlock = true;
4240         }
4241
4242         if (conn->protocol >= PROTOCOL_NT1) {
4243                 const char *client_signing = NULL;
4244                 bool server_mandatory = false;
4245                 bool server_allowed = false;
4246                 const char *server_signing = NULL;
4247                 bool ok;
4248                 uint8_t key_len;
4249
4250                 if (wct != 0x11) {
4251                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4252                         return;
4253                 }
4254
4255                 /* NT protocol */
4256                 server_security_mode = CVAL(vwv + 1, 0);
4257                 server_max_mux = SVAL(vwv + 1, 1);
4258                 server_max_xmit = IVAL(vwv + 3, 1);
4259                 server_session_key = IVAL(vwv + 7, 1);
4260                 server_time_zone = SVALS(vwv + 15, 1);
4261                 server_time_zone *= 60;
4262                 /* this time arrives in real GMT */
4263                 server_system_time = BVAL(vwv + 11, 1);
4264                 server_capabilities = IVAL(vwv + 9, 1);
4265
4266                 key_len = CVAL(vwv + 16, 1);
4267
4268                 if (server_capabilities & CAP_RAW_MODE) {
4269                         server_readbraw = true;
4270                         server_writebraw = true;
4271                 }
4272                 if (server_capabilities & CAP_LOCK_AND_READ) {
4273                         server_lockread = true;
4274                 }
4275
4276                 if (server_capabilities & CAP_EXTENDED_SECURITY) {
4277                         DATA_BLOB blob1, blob2;
4278
4279                         if (num_bytes < 16) {
4280                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4281                                 return;
4282                         }
4283
4284                         blob1 = data_blob_const(bytes, 16);
4285                         status = GUID_from_data_blob(&blob1, &server_guid);
4286                         if (tevent_req_nterror(req, status)) {
4287                                 return;
4288                         }
4289
4290                         blob1 = data_blob_const(bytes+16, num_bytes-16);
4291                         blob2 = data_blob_dup_talloc(state, blob1);
4292                         if (blob1.length > 0 &&
4293                             tevent_req_nomem(blob2.data, req)) {
4294                                 return;
4295                         }
4296                         server_gss_blob = blob2;
4297                 } else {
4298                         DATA_BLOB blob1, blob2;
4299
4300                         if (num_bytes < key_len) {
4301                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4302                                 return;
4303                         }
4304
4305                         if (key_len != 0 && key_len != 8) {
4306                                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4307                                 return;
4308                         }
4309
4310                         if (key_len == 8) {
4311                                 memcpy(server_challenge, bytes, 8);
4312                         }
4313
4314                         blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4315                         blob2 = data_blob_const(bytes+key_len, num_bytes-key_len);
4316                         if (blob1.length > 0) {
4317                                 size_t len;
4318
4319                                 len = utf16_len_n(blob1.data,
4320                                                   blob1.length);
4321                                 blob1.length = len;
4322
4323                                 ok = convert_string_talloc(state,
4324                                                            CH_UTF16LE,
4325                                                            CH_UNIX,
4326                                                            blob1.data,
4327                                                            blob1.length,
4328                                                            &server_workgroup,
4329                                                            &len);
4330                                 if (!ok) {
4331                                         status = map_nt_error_from_unix_common(errno);
4332                                         tevent_req_nterror(req, status);
4333                                         return;
4334                                 }
4335                         }
4336
4337                         blob2.data += blob1.length;
4338                         blob2.length -= blob1.length;
4339                         if (blob2.length > 0) {
4340                                 size_t len;
4341
4342                                 len = utf16_len_n(blob1.data,
4343                                                   blob1.length);
4344                                 blob1.length = len;
4345
4346                                 ok = convert_string_talloc(state,
4347                                                            CH_UTF16LE,
4348                                                            CH_UNIX,
4349                                                            blob2.data,
4350                                                            blob2.length,
4351                                                            &server_name,
4352                                                            &len);
4353                                 if (!ok) {
4354                                         status = map_nt_error_from_unix_common(errno);
4355                                         tevent_req_nterror(req, status);
4356                                         return;
4357                                 }
4358                         }
4359                 }
4360
4361                 client_signing = "disabled";
4362                 if (conn->allow_signing) {
4363                         client_signing = "allowed";
4364                 }
4365                 if (conn->mandatory_signing) {
4366                         client_signing = "required";
4367                 }
4368
4369                 server_signing = "not supported";
4370                 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_ENABLED) {
4371                         server_signing = "supported";
4372                         server_allowed = true;
4373                 } else if (conn->mandatory_signing) {
4374                         /*
4375                          * We have mandatory signing as client
4376                          * lets assume the server will look at our
4377                          * FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED
4378                          * flag in the session setup
4379                          */
4380                         server_signing = "not announced";
4381                         server_allowed = true;
4382                 }
4383                 if (server_security_mode & NEGOTIATE_SECURITY_SIGNATURES_REQUIRED) {
4384                         server_signing = "required";
4385                         server_mandatory = true;
4386                 }
4387
4388                 ok = smb_signing_set_negotiated(conn->smb1.signing,
4389                                                 server_allowed,
4390                                                 server_mandatory);
4391                 if (!ok) {
4392                         DEBUG(1,("cli_negprot: SMB signing is required, "
4393                                  "but client[%s] and server[%s] mismatch\n",
4394                                  client_signing, server_signing));
4395                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
4396                         return;
4397                 }
4398
4399         } else if (conn->protocol >= PROTOCOL_LANMAN1) {
4400                 DATA_BLOB blob1;
4401                 uint8_t key_len;
4402                 time_t t;
4403
4404                 if (wct != 0x0D) {
4405                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4406                         return;
4407                 }
4408
4409                 server_security_mode = SVAL(vwv + 1, 0);
4410                 server_max_xmit = SVAL(vwv + 2, 0);
4411                 server_max_mux = SVAL(vwv + 3, 0);
4412                 server_readbraw = ((SVAL(vwv + 5, 0) & 0x1) != 0);
4413                 server_writebraw = ((SVAL(vwv + 5, 0) & 0x2) != 0);
4414                 server_session_key = IVAL(vwv + 6, 0);
4415                 server_time_zone = SVALS(vwv + 10, 0);
4416                 server_time_zone *= 60;
4417                 /* this time is converted to GMT by make_unix_date */
4418                 t = pull_dos_date((const uint8_t *)(vwv + 8), server_time_zone);
4419                 unix_to_nt_time(&server_system_time, t);
4420                 key_len = SVAL(vwv + 11, 0);
4421
4422                 if (num_bytes < key_len) {
4423                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4424                         return;
4425                 }
4426
4427                 if (key_len != 0 && key_len != 8) {
4428                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4429                         return;
4430                 }
4431
4432                 if (key_len == 8) {
4433                         memcpy(server_challenge, bytes, 8);
4434                 }
4435
4436                 blob1 = data_blob_const(bytes+key_len, num_bytes-key_len);
4437                 if (blob1.length > 0) {
4438                         size_t len;
4439                         bool ok;
4440
4441                         len = utf16_len_n(blob1.data,
4442                                           blob1.length);
4443                         blob1.length = len;
4444
4445                         ok = convert_string_talloc(state,
4446                                                    CH_DOS,
4447                                                    CH_UNIX,
4448                                                    blob1.data,
4449                                                    blob1.length,
4450                                                    &server_workgroup,
4451                                                    &len);
4452                         if (!ok) {
4453                                 status = map_nt_error_from_unix_common(errno);
4454                                 tevent_req_nterror(req, status);
4455                                 return;
4456                         }
4457                 }
4458
4459         } else {
4460                 /* the old core protocol */
4461                 server_time_zone = get_time_zone(time(NULL));
4462                 server_max_xmit = 1024;
4463                 server_max_mux = 1;
4464         }
4465
4466         if (server_max_xmit < 1024) {
4467                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4468                 return;
4469         }
4470
4471         if (server_max_mux < 1) {
4472                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4473                 return;
4474         }
4475
4476         /*
4477          * Now calculate the negotiated capabilities
4478          * based on the mask for:
4479          * - client only flags
4480          * - flags used in both directions
4481          * - server only flags
4482          */
4483         both_capabilities = client_capabilities & server_capabilities;
4484         capabilities = client_capabilities & SMB_CAP_CLIENT_MASK;
4485         capabilities |= both_capabilities & SMB_CAP_BOTH_MASK;
4486         capabilities |= server_capabilities & SMB_CAP_SERVER_MASK;
4487
4488         max_xmit = MIN(client_max_xmit, server_max_xmit);
4489
4490         conn->smb1.server.capabilities = server_capabilities;
4491         conn->smb1.capabilities = capabilities;
4492
4493         conn->smb1.server.max_xmit = server_max_xmit;
4494         conn->smb1.max_xmit = max_xmit;
4495
4496         conn->smb1.server.max_mux = server_max_mux;
4497
4498         conn->smb1.server.security_mode = server_security_mode;
4499
4500         conn->smb1.server.readbraw = server_readbraw;
4501         conn->smb1.server.writebraw = server_writebraw;
4502         conn->smb1.server.lockread = server_lockread;
4503         conn->smb1.server.writeunlock = server_writeunlock;
4504
4505         conn->smb1.server.session_key = server_session_key;
4506
4507         talloc_steal(conn, server_gss_blob.data);
4508         conn->smb1.server.gss_blob = server_gss_blob;
4509         conn->smb1.server.guid = server_guid;
4510         memcpy(conn->smb1.server.challenge, server_challenge, 8);
4511         conn->smb1.server.workgroup = talloc_move(conn, &server_workgroup);
4512         conn->smb1.server.name = talloc_move(conn, &server_name);
4513
4514         conn->smb1.server.time_zone = server_time_zone;
4515         conn->smb1.server.system_time = server_system_time;
4516
4517         tevent_req_done(req);
4518 }
4519
4520 static size_t smbXcli_padding_helper(uint32_t offset, size_t n)
4521 {
4522         if ((offset & (n-1)) == 0) return 0;
4523         return n - (offset & (n-1));
4524 }
4525
4526 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state)
4527 {
4528         size_t i;
4529         uint8_t *buf;
4530         uint16_t dialect_count = 0;
4531         DATA_BLOB dyn = data_blob_null;
4532
4533         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4534                 bool ok;
4535                 uint8_t val[2];
4536
4537                 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4538                         continue;
4539                 }
4540
4541                 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4542                         continue;
4543                 }
4544
4545                 SSVAL(val, 0, smb2cli_prots[i].smb2_dialect);
4546
4547                 ok = data_blob_append(state, &dyn, val, sizeof(val));
4548                 if (!ok) {
4549                         return NULL;
4550                 }
4551
4552                 dialect_count++;
4553         }
4554
4555         buf = state->smb2.fixed;
4556         SSVAL(buf, 0, 36);
4557         SSVAL(buf, 2, dialect_count);
4558         SSVAL(buf, 4, state->conn->smb2.client.security_mode);
4559         SSVAL(buf, 6, 0);       /* Reserved */
4560         if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
4561                 SIVAL(buf, 8, state->conn->smb2.client.capabilities);
4562         } else {
4563                 SIVAL(buf, 8, 0);       /* Capabilities */
4564         }
4565         if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
4566                 NTSTATUS status;
4567                 DATA_BLOB blob;
4568
4569                 status = GUID_to_ndr_blob(&state->conn->smb2.client.guid,
4570                                           state, &blob);
4571                 if (!NT_STATUS_IS_OK(status)) {
4572                         return NULL;
4573                 }
4574                 memcpy(buf+12, blob.data, 16); /* ClientGuid */
4575         } else {
4576                 memset(buf+12, 0, 16);  /* ClientGuid */
4577         }
4578
4579         if (state->conn->max_protocol >= PROTOCOL_SMB3_10) {
4580                 NTSTATUS status;
4581                 struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4582                 uint32_t offset;
4583                 DATA_BLOB b;
4584                 uint8_t p[38];
4585                 const uint8_t zeros[8] = {0, };
4586                 size_t pad;
4587                 bool ok;
4588
4589                 SSVAL(p, 0,  1); /* HashAlgorithmCount */
4590                 SSVAL(p, 2, 32); /* SaltLength */
4591                 SSVAL(p, 4, SMB2_PREAUTH_INTEGRITY_SHA512);
4592                 generate_random_buffer(p + 6, 32);
4593
4594                 b = data_blob_const(p, 38);
4595                 status = smb2_negotiate_context_add(state, &c,
4596                                         SMB2_PREAUTH_INTEGRITY_CAPABILITIES, b);
4597                 if (!NT_STATUS_IS_OK(status)) {
4598                         return NULL;
4599                 }
4600
4601                 SSVAL(p, 0, 2); /* ChiperCount */
4602                 /*
4603                  * For now we preferr CCM because our implementation
4604                  * is faster than GCM, see bug #11451.
4605                  */
4606                 SSVAL(p, 2, SMB2_ENCRYPTION_AES128_CCM);
4607                 SSVAL(p, 4, SMB2_ENCRYPTION_AES128_GCM);
4608
4609                 b = data_blob_const(p, 6);
4610                 status = smb2_negotiate_context_add(state, &c,
4611                                         SMB2_ENCRYPTION_CAPABILITIES, b);
4612                 if (!NT_STATUS_IS_OK(status)) {
4613                         return NULL;
4614                 }
4615
4616                 status = smb2_negotiate_context_push(state, &b, c);
4617                 if (!NT_STATUS_IS_OK(status)) {
4618                         return NULL;
4619                 }
4620
4621                 offset = SMB2_HDR_BODY + sizeof(state->smb2.fixed) + dyn.length;
4622                 pad = smbXcli_padding_helper(offset, 8);
4623
4624                 ok = data_blob_append(state, &dyn, zeros, pad);
4625                 if (!ok) {
4626                         return NULL;
4627                 }
4628                 offset += pad;
4629
4630                 ok = data_blob_append(state, &dyn, b.data, b.length);
4631                 if (!ok) {
4632                         return NULL;
4633                 }
4634
4635                 SIVAL(buf, 28, offset);   /* NegotiateContextOffset */
4636                 SSVAL(buf, 32, c.num_contexts); /* NegotiateContextCount */
4637                 SSVAL(buf, 34, 0);        /* Reserved */
4638         } else {
4639                 SBVAL(buf, 28, 0);      /* Reserved/ClientStartTime */
4640         }
4641
4642         return smb2cli_req_send(state, state->ev,
4643                                 state->conn, SMB2_OP_NEGPROT,
4644                                 0, 0, /* flags */
4645                                 state->timeout_msec,
4646                                 NULL, NULL, /* tcon, session */
4647                                 state->smb2.fixed, sizeof(state->smb2.fixed),
4648                                 dyn.data, dyn.length,
4649                                 UINT16_MAX); /* max_dyn_len */
4650 }
4651
4652 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq)
4653 {
4654         struct tevent_req *req =
4655                 tevent_req_callback_data(subreq,
4656                 struct tevent_req);
4657         struct smbXcli_negprot_state *state =
4658                 tevent_req_data(req,
4659                 struct smbXcli_negprot_state);
4660         struct smbXcli_conn *conn = state->conn;
4661         size_t security_offset, security_length;
4662         DATA_BLOB blob;
4663         NTSTATUS status;
4664         struct iovec *iov;
4665         uint8_t *body;
4666         size_t i;
4667         uint16_t dialect_revision;
4668         struct smb2_negotiate_contexts c = { .num_contexts = 0, };
4669         uint32_t negotiate_context_offset = 0;
4670         uint16_t negotiate_context_count = 0;
4671         DATA_BLOB negotiate_context_blob = data_blob_null;
4672         size_t avail;
4673         size_t ctx_ofs;
4674         size_t needed;
4675         struct smb2_negotiate_context *preauth = NULL;
4676         uint16_t hash_count;
4677         uint16_t salt_length;
4678         uint16_t hash_selected;
4679         struct hc_sha512state sctx;
4680         struct smb2_negotiate_context *cipher = NULL;
4681         struct iovec sent_iov[3];
4682         static const struct smb2cli_req_expected_response expected[] = {
4683         {
4684                 .status = NT_STATUS_OK,
4685                 .body_size = 0x41
4686         }
4687         };
4688
4689         status = smb2cli_req_recv(subreq, state, &iov,
4690                                   expected, ARRAY_SIZE(expected));
4691         if (tevent_req_nterror(req, status)) {
4692                 return;
4693         }
4694
4695         body = (uint8_t *)iov[1].iov_base;
4696
4697         dialect_revision = SVAL(body, 4);
4698
4699         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
4700                 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
4701                         continue;
4702                 }
4703
4704                 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
4705                         continue;
4706                 }
4707
4708                 if (smb2cli_prots[i].smb2_dialect != dialect_revision) {
4709                         continue;
4710                 }
4711
4712                 conn->protocol = smb2cli_prots[i].proto;
4713                 break;
4714         }
4715
4716         if (conn->protocol == PROTOCOL_NONE) {
4717                 TALLOC_FREE(subreq);
4718
4719                 if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
4720                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4721                         return;
4722                 }
4723
4724                 if (dialect_revision != SMB2_DIALECT_REVISION_2FF) {
4725                         tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4726                         return;
4727                 }
4728
4729                 /* make sure we do not loop forever */
4730                 state->conn->min_protocol = PROTOCOL_SMB2_02;
4731
4732                 /*
4733                  * send a SMB2 negprot, in order to negotiate
4734                  * the SMB2 dialect.
4735                  */
4736                 subreq = smbXcli_negprot_smb2_subreq(state);
4737                 if (tevent_req_nomem(subreq, req)) {
4738                         return;
4739                 }
4740                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4741                 return;
4742         }
4743
4744         conn->smb2.server.security_mode = SVAL(body, 2);
4745         if (conn->protocol >= PROTOCOL_SMB3_10) {
4746                 negotiate_context_count = SVAL(body, 6);
4747         }
4748
4749         blob = data_blob_const(body + 8, 16);
4750         status = GUID_from_data_blob(&blob, &conn->smb2.server.guid);
4751         if (tevent_req_nterror(req, status)) {
4752                 return;
4753         }
4754
4755         conn->smb2.server.capabilities  = IVAL(body, 24);
4756         conn->smb2.server.max_trans_size= IVAL(body, 28);
4757         conn->smb2.server.max_read_size = IVAL(body, 32);
4758         conn->smb2.server.max_write_size= IVAL(body, 36);
4759         conn->smb2.server.system_time   = BVAL(body, 40);
4760         conn->smb2.server.start_time    = BVAL(body, 48);
4761
4762         security_offset = SVAL(body, 56);
4763         security_length = SVAL(body, 58);
4764
4765         if (security_offset != SMB2_HDR_BODY + iov[1].iov_len) {
4766                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4767                 return;
4768         }
4769
4770         if (security_length > iov[2].iov_len) {
4771                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4772                 return;
4773         }
4774
4775         conn->smb2.server.gss_blob = data_blob_talloc(conn,
4776                                                 iov[2].iov_base,
4777                                                 security_length);
4778         if (tevent_req_nomem(conn->smb2.server.gss_blob.data, req)) {
4779                 return;
4780         }
4781
4782         if (conn->protocol < PROTOCOL_SMB3_10) {
4783                 TALLOC_FREE(subreq);
4784
4785                 if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4786                         conn->smb2.server.cipher = SMB2_ENCRYPTION_AES128_CCM;
4787                 }
4788                 tevent_req_done(req);
4789                 return;
4790         }
4791
4792         if (conn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION) {
4793                 tevent_req_nterror(req,
4794                                 NT_STATUS_INVALID_NETWORK_RESPONSE);
4795                 return;
4796         }
4797
4798         negotiate_context_offset = IVAL(body, 60);
4799         if (negotiate_context_offset < security_offset) {
4800                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4801                 return;
4802         }
4803
4804         ctx_ofs = negotiate_context_offset - security_offset;
4805         if (ctx_ofs > iov[2].iov_len) {
4806                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4807                 return;
4808         }
4809         avail = iov[2].iov_len - security_length;
4810         needed = iov[2].iov_len - ctx_ofs;
4811         if (needed > avail) {
4812                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4813                 return;
4814         }
4815
4816         negotiate_context_blob.data = (uint8_t *)iov[2].iov_base;
4817         negotiate_context_blob.length = iov[2].iov_len;
4818
4819         negotiate_context_blob.data += ctx_ofs;
4820         negotiate_context_blob.length -= ctx_ofs;
4821
4822         status = smb2_negotiate_context_parse(state, negotiate_context_blob, &c);
4823         if (tevent_req_nterror(req, status)) {
4824                 return;
4825         }
4826
4827         if (negotiate_context_count != c.num_contexts) {
4828                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4829                 return;
4830         }
4831
4832         preauth = smb2_negotiate_context_find(&c,
4833                                         SMB2_PREAUTH_INTEGRITY_CAPABILITIES);
4834         if (preauth == NULL) {
4835                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4836                 return;
4837         }
4838
4839         if (preauth->data.length < 6) {
4840                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4841                 return;
4842         }
4843
4844         hash_count = SVAL(preauth->data.data, 0);
4845         salt_length = SVAL(preauth->data.data, 2);
4846         hash_selected = SVAL(preauth->data.data, 4);
4847
4848         if (hash_count != 1) {
4849                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4850                 return;
4851         }
4852
4853         if (preauth->data.length != (6 + salt_length)) {
4854                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4855                 return;
4856         }
4857
4858         if (hash_selected != SMB2_PREAUTH_INTEGRITY_SHA512) {
4859                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
4860                 return;
4861         }
4862
4863         cipher = smb2_negotiate_context_find(&c, SMB2_ENCRYPTION_CAPABILITIES);
4864         if (cipher != NULL) {
4865                 uint16_t cipher_count;
4866
4867                 if (cipher->data.length < 2) {
4868                         tevent_req_nterror(req,
4869                                         NT_STATUS_INVALID_NETWORK_RESPONSE);
4870                         return;
4871                 }
4872
4873                 cipher_count = SVAL(cipher->data.data, 0);
4874
4875                 if (cipher_count > 1) {
4876                         tevent_req_nterror(req,
4877                                         NT_STATUS_INVALID_NETWORK_RESPONSE);
4878                         return;
4879                 }
4880
4881                 if (cipher->data.length != (2 + 2 * cipher_count)) {
4882                         tevent_req_nterror(req,
4883                                         NT_STATUS_INVALID_NETWORK_RESPONSE);
4884                         return;
4885                 }
4886
4887                 if (cipher_count == 1) {
4888                         uint16_t cipher_selected;
4889
4890                         cipher_selected = SVAL(cipher->data.data, 2);
4891
4892                         switch (cipher_selected) {
4893                         case SMB2_ENCRYPTION_AES128_GCM:
4894                         case SMB2_ENCRYPTION_AES128_CCM:
4895                                 conn->smb2.server.cipher = cipher_selected;
4896                                 break;
4897                         }
4898                 }
4899         }
4900
4901         /* First we hash the request */
4902         smb2cli_req_get_sent_iov(subreq, sent_iov);
4903         samba_SHA512_Init(&sctx);
4904         samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
4905                       sizeof(conn->smb2.preauth_sha512));
4906         for (i = 0; i < 3; i++) {
4907                 samba_SHA512_Update(&sctx, sent_iov[i].iov_base, sent_iov[i].iov_len);
4908         }
4909         samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
4910         TALLOC_FREE(subreq);
4911
4912         /* And now we hash the response */
4913         samba_SHA512_Init(&sctx);
4914         samba_SHA512_Update(&sctx, conn->smb2.preauth_sha512,
4915                       sizeof(conn->smb2.preauth_sha512));
4916         for (i = 0; i < 3; i++) {
4917                 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
4918         }
4919         samba_SHA512_Final(conn->smb2.preauth_sha512, &sctx);
4920
4921         tevent_req_done(req);
4922 }
4923
4924 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
4925                                                   TALLOC_CTX *tmp_mem,
4926                                                   uint8_t *inbuf)
4927 {
4928         size_t num_pending = talloc_array_length(conn->pending);
4929         struct tevent_req *subreq;
4930         struct smbXcli_req_state *substate;
4931         struct tevent_req *req;
4932         uint32_t protocol_magic;
4933         size_t inbuf_len = smb_len_nbt(inbuf);
4934
4935         if (num_pending != 1) {
4936                 return NT_STATUS_INTERNAL_ERROR;
4937         }
4938
4939         if (inbuf_len < 4) {
4940                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
4941         }
4942
4943         subreq = conn->pending[0];
4944         substate = tevent_req_data(subreq, struct smbXcli_req_state);
4945         req = tevent_req_callback_data(subreq, struct tevent_req);
4946
4947         protocol_magic = IVAL(inbuf, 4);
4948
4949         switch (protocol_magic) {
4950         case SMB_MAGIC:
4951                 tevent_req_set_callback(subreq, smbXcli_negprot_smb1_done, req);
4952                 conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
4953                 return smb1cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4954
4955         case SMB2_MAGIC:
4956                 if (substate->smb2.recv_iov == NULL) {
4957                         /*
4958                          * For the SMB1 negprot we have move it.
4959                          */
4960                         substate->smb2.recv_iov = substate->smb1.recv_iov;
4961                         substate->smb1.recv_iov = NULL;
4962                 }
4963
4964                 /*
4965                  * we got an SMB2 answer, which consumed sequence number 0
4966                  * so we need to use 1 as the next one.
4967                  *
4968                  * we also need to set the current credits to 0
4969                  * as we consumed the initial one. The SMB2 answer
4970                  * hopefully grant us a new credit.
4971                  */
4972                 conn->smb2.mid = 1;
4973                 conn->smb2.cur_credits = 0;
4974                 tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
4975                 conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
4976                 return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
4977         }
4978
4979         DEBUG(10, ("Got non-SMB PDU\n"));
4980         return NT_STATUS_INVALID_NETWORK_RESPONSE;
4981 }
4982
4983 NTSTATUS smbXcli_negprot_recv(struct tevent_req *req)
4984 {
4985         return tevent_req_simple_recv_ntstatus(req);
4986 }
4987
4988 NTSTATUS smbXcli_negprot(struct smbXcli_conn *conn,
4989                          uint32_t timeout_msec,
4990                          enum protocol_types min_protocol,
4991                          enum protocol_types max_protocol)
4992 {
4993         TALLOC_CTX *frame = talloc_stackframe();
4994         struct tevent_context *ev;
4995         struct tevent_req *req;
4996         NTSTATUS status = NT_STATUS_NO_MEMORY;
4997         bool ok;
4998
4999         if (smbXcli_conn_has_async_calls(conn)) {
5000                 /*
5001                  * Can't use sync call while an async call is in flight
5002                  */
5003                 status = NT_STATUS_INVALID_PARAMETER_MIX;
5004                 goto fail;
5005         }
5006         ev = samba_tevent_context_init(frame);
5007         if (ev == NULL) {
5008                 goto fail;
5009         }
5010         req = smbXcli_negprot_send(frame, ev, conn, timeout_msec,
5011                                    min_protocol, max_protocol);
5012         if (req == NULL) {
5013                 goto fail;
5014         }
5015         ok = tevent_req_poll_ntstatus(req, ev, &status);
5016         if (!ok) {
5017                 goto fail;
5018         }
5019         status = smbXcli_negprot_recv(req);
5020  fail:
5021         TALLOC_FREE(frame);
5022         return status;
5023 }
5024
5025 struct smb2cli_validate_negotiate_info_state {
5026         struct smbXcli_conn *conn;
5027         DATA_BLOB in_input_buffer;
5028         DATA_BLOB in_output_buffer;
5029         DATA_BLOB out_input_buffer;
5030         DATA_BLOB out_output_buffer;
5031         uint16_t dialect;
5032 };
5033
5034 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq);
5035
5036 struct tevent_req *smb2cli_validate_negotiate_info_send(TALLOC_CTX *mem_ctx,
5037                                                 struct tevent_context *ev,
5038                                                 struct smbXcli_conn *conn,
5039                                                 uint32_t timeout_msec,
5040                                                 struct smbXcli_session *session,
5041                                                 struct smbXcli_tcon *tcon)
5042 {
5043         struct tevent_req *req;
5044         struct smb2cli_validate_negotiate_info_state *state;
5045         uint8_t *buf;
5046         uint16_t dialect_count = 0;
5047         struct tevent_req *subreq;
5048         bool _save_should_sign;
5049         size_t i;
5050
5051         req = tevent_req_create(mem_ctx, &state,
5052                                 struct smb2cli_validate_negotiate_info_state);
5053         if (req == NULL) {
5054                 return NULL;
5055         }
5056         state->conn = conn;
5057
5058         state->in_input_buffer = data_blob_talloc_zero(state,
5059                                         4 + 16 + 1 + 1 + 2);
5060         if (tevent_req_nomem(state->in_input_buffer.data, req)) {
5061                 return tevent_req_post(req, ev);
5062         }
5063         buf = state->in_input_buffer.data;
5064
5065         if (state->conn->max_protocol >= PROTOCOL_SMB2_22) {
5066                 SIVAL(buf, 0, conn->smb2.client.capabilities);
5067         } else {
5068                 SIVAL(buf, 0, 0); /* Capabilities */
5069         }
5070         if (state->conn->max_protocol >= PROTOCOL_SMB2_10) {
5071                 NTSTATUS status;
5072                 DATA_BLOB blob;
5073
5074                 status = GUID_to_ndr_blob(&conn->smb2.client.guid,
5075                                           state, &blob);
5076                 if (!NT_STATUS_IS_OK(status)) {
5077                         return NULL;
5078                 }
5079                 memcpy(buf+4, blob.data, 16); /* ClientGuid */
5080         } else {
5081                 memset(buf+4, 0, 16);   /* ClientGuid */
5082         }
5083         if (state->conn->min_protocol >= PROTOCOL_SMB2_02) {
5084                 SCVAL(buf, 20, conn->smb2.client.security_mode);
5085         } else {
5086                 SCVAL(buf, 20, 0);
5087         }
5088         SCVAL(buf, 21, 0); /* reserved */
5089
5090         for (i=0; i < ARRAY_SIZE(smb2cli_prots); i++) {
5091                 bool ok;
5092                 size_t ofs;
5093
5094                 if (smb2cli_prots[i].proto < state->conn->min_protocol) {
5095                         continue;
5096                 }
5097
5098                 if (smb2cli_prots[i].proto > state->conn->max_protocol) {
5099                         continue;
5100                 }
5101
5102                 if (smb2cli_prots[i].proto == state->conn->protocol) {
5103                         state->dialect = smb2cli_prots[i].smb2_dialect;
5104                 }
5105
5106                 ofs = state->in_input_buffer.length;
5107                 ok = data_blob_realloc(state, &state->in_input_buffer,
5108                                        ofs + 2);
5109                 if (!ok) {
5110                         tevent_req_oom(req);
5111                         return tevent_req_post(req, ev);
5112                 }
5113
5114                 buf = state->in_input_buffer.data;
5115                 SSVAL(buf, ofs, smb2cli_prots[i].smb2_dialect);
5116
5117                 dialect_count++;
5118         }
5119         buf = state->in_input_buffer.data;
5120         SSVAL(buf, 22, dialect_count);
5121
5122         _save_should_sign = smb2cli_tcon_is_signing_on(tcon);
5123         smb2cli_tcon_should_sign(tcon, true);
5124         subreq = smb2cli_ioctl_send(state, ev, conn,
5125                                     timeout_msec, session, tcon,
5126                                     UINT64_MAX, /* in_fid_persistent */
5127                                     UINT64_MAX, /* in_fid_volatile */
5128                                     FSCTL_VALIDATE_NEGOTIATE_INFO,
5129                                     0, /* in_max_input_length */
5130                                     &state->in_input_buffer,
5131                                     24, /* in_max_output_length */
5132                                     &state->in_output_buffer,
5133                                     SMB2_IOCTL_FLAG_IS_FSCTL);
5134         smb2cli_tcon_should_sign(tcon, _save_should_sign);
5135         if (tevent_req_nomem(subreq, req)) {
5136                 return tevent_req_post(req, ev);
5137         }
5138         tevent_req_set_callback(subreq,
5139                                 smb2cli_validate_negotiate_info_done,
5140                                 req);
5141
5142         return req;
5143 }
5144
5145 static void smb2cli_validate_negotiate_info_done(struct tevent_req *subreq)
5146 {
5147         struct tevent_req *req =
5148                 tevent_req_callback_data(subreq,
5149                 struct tevent_req);
5150         struct smb2cli_validate_negotiate_info_state *state =
5151                 tevent_req_data(req,
5152                 struct smb2cli_validate_negotiate_info_state);
5153         NTSTATUS status;
5154         const uint8_t *buf;
5155         uint32_t capabilities;
5156         DATA_BLOB guid_blob;
5157         struct GUID server_guid;
5158         uint16_t security_mode;
5159         uint16_t dialect;
5160
5161         status = smb2cli_ioctl_recv(subreq, state,
5162                                     &state->out_input_buffer,
5163                                     &state->out_output_buffer);
5164         TALLOC_FREE(subreq);
5165         if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED)) {
5166                 /*
5167                  * The response was signed, but not supported
5168                  *
5169                  * Older Windows and Samba releases return
5170                  * NT_STATUS_FILE_CLOSED.
5171                  */
5172                 tevent_req_done(req);
5173                 return;
5174         }
5175         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_DEVICE_REQUEST)) {
5176                 /*
5177                  * The response was signed, but not supported
5178                  *
5179                  * This is returned by the NTVFS based Samba 4.x file server
5180                  * for file shares.
5181                  */
5182                 tevent_req_done(req);
5183                 return;
5184         }
5185         if (NT_STATUS_EQUAL(status, NT_STATUS_FS_DRIVER_REQUIRED)) {
5186                 /*
5187                  * The response was signed, but not supported
5188                  *
5189                  * This is returned by the NTVFS based Samba 4.x file server
5190                  * for ipc shares.
5191                  */
5192                 tevent_req_done(req);
5193                 return;
5194         }
5195         if (tevent_req_nterror(req, status)) {
5196                 return;
5197         }
5198
5199         if (state->out_output_buffer.length != 24) {
5200                 tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
5201                 return;
5202         }
5203
5204         buf = state->out_output_buffer.data;
5205
5206         capabilities = IVAL(buf, 0);
5207         guid_blob = data_blob_const(buf + 4, 16);
5208         status = GUID_from_data_blob(&guid_blob, &server_guid);
5209         if (tevent_req_nterror(req, status)) {
5210                 return;
5211         }
5212         security_mode = CVAL(buf, 20);
5213         dialect = SVAL(buf, 22);
5214
5215         if (capabilities != state->conn->smb2.server.capabilities) {
5216                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5217                 return;
5218         }
5219
5220         if (!GUID_equal(&server_guid, &state->conn->smb2.server.guid)) {
5221                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5222                 return;
5223         }
5224
5225         if (security_mode != state->conn->smb2.server.security_mode) {
5226                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5227                 return;
5228         }
5229
5230         if (dialect != state->dialect) {
5231                 tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
5232                 return;
5233         }
5234
5235         tevent_req_done(req);
5236 }
5237
5238 NTSTATUS smb2cli_validate_negotiate_info_recv(struct tevent_req *req)
5239 {
5240         return tevent_req_simple_recv_ntstatus(req);
5241 }
5242
5243 static int smbXcli_session_destructor(struct smbXcli_session *session)
5244 {
5245         if (session->conn == NULL) {
5246                 return 0;
5247         }
5248
5249         DLIST_REMOVE(session->conn->sessions, session);
5250         return 0;
5251 }
5252
5253 struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
5254                                                struct smbXcli_conn *conn)
5255 {
5256         struct smbXcli_session *session;
5257
5258         session = talloc_zero(mem_ctx, struct smbXcli_session);
5259         if (session == NULL) {
5260                 return NULL;
5261         }
5262         session->smb2 = talloc_zero(session, struct smb2cli_session);
5263         if (session->smb2 == NULL) {
5264                 talloc_free(session);
5265                 return NULL;
5266         }
5267         talloc_set_destructor(session, smbXcli_session_destructor);
5268
5269         DLIST_ADD_END(conn->sessions, session);
5270         session->conn = conn;
5271
5272         memcpy(session->smb2_channel.preauth_sha512,
5273                conn->smb2.preauth_sha512,
5274                sizeof(session->smb2_channel.preauth_sha512));
5275
5276         return session;
5277 }
5278
5279 struct smbXcli_session *smbXcli_session_copy(TALLOC_CTX *mem_ctx,
5280                                                 struct smbXcli_session *src)
5281 {
5282         struct smbXcli_session *session;
5283
5284         session = talloc_zero(mem_ctx, struct smbXcli_session);
5285         if (session == NULL) {
5286                 return NULL;
5287         }
5288         session->smb2 = talloc_zero(session, struct smb2cli_session);
5289         if (session->smb2 == NULL) {
5290                 talloc_free(session);
5291                 return NULL;
5292         }
5293
5294         session->conn = src->conn;
5295         *session->smb2 = *src->smb2;
5296         session->smb2_channel = src->smb2_channel;
5297         session->disconnect_expired = src->disconnect_expired;
5298
5299         DLIST_ADD_END(src->conn->sessions, session);
5300         talloc_set_destructor(session, smbXcli_session_destructor);
5301
5302         return session;
5303 }
5304
5305 bool smbXcli_session_is_authenticated(struct smbXcli_session *session)
5306 {
5307         const DATA_BLOB *application_key;
5308
5309         if (session == NULL) {
5310                 return false;
5311         }
5312
5313         if (session->conn == NULL) {
5314                 return false;
5315         }
5316
5317         /*
5318          * If we have an application key we had a session key negotiated
5319          * at auth time.
5320          */
5321         if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5322                 application_key = &session->smb2->application_key;
5323         } else {
5324                 application_key = &session->smb1.application_key;
5325         }
5326
5327         if (application_key->length == 0) {
5328                 return false;
5329         }
5330
5331         return true;
5332 }
5333
5334 NTSTATUS smbXcli_session_application_key(struct smbXcli_session *session,
5335                                          TALLOC_CTX *mem_ctx,
5336                                          DATA_BLOB *key)
5337 {
5338         const DATA_BLOB *application_key;
5339
5340         *key = data_blob_null;
5341
5342         if (session->conn == NULL) {
5343                 return NT_STATUS_NO_USER_SESSION_KEY;
5344         }
5345
5346         if (session->conn->protocol >= PROTOCOL_SMB2_02) {
5347                 application_key = &session->smb2->application_key;
5348         } else {
5349                 application_key = &session->smb1.application_key;
5350         }
5351
5352         if (application_key->length == 0) {
5353                 return NT_STATUS_NO_USER_SESSION_KEY;
5354         }
5355
5356         *key = data_blob_dup_talloc(mem_ctx, *application_key);
5357         if (key->data == NULL) {
5358                 return NT_STATUS_NO_MEMORY;
5359         }
5360
5361         return NT_STATUS_OK;
5362 }
5363
5364 void smbXcli_session_set_disconnect_expired(struct smbXcli_session *session)
5365 {
5366         session->disconnect_expired = true;
5367 }
5368
5369 uint16_t smb1cli_session_current_id(struct smbXcli_session *session)
5370 {
5371         return session->smb1.session_id;
5372 }
5373
5374 void smb1cli_session_set_id(struct smbXcli_session *session,
5375                             uint16_t session_id)
5376 {
5377         session->smb1.session_id = session_id;
5378 }
5379
5380 void smb1cli_session_set_action(struct smbXcli_session *session,
5381                                 uint16_t action)
5382 {
5383         session->smb1.action = action;
5384 }
5385
5386 NTSTATUS smb1cli_session_set_session_key(struct smbXcli_session *session,
5387                                          const DATA_BLOB _session_key)
5388 {
5389         struct smbXcli_conn *conn = session->conn;
5390         uint8_t session_key[16];
5391
5392         if (conn == NULL) {
5393                 return NT_STATUS_INVALID_PARAMETER_MIX;
5394         }
5395
5396         if (session->smb1.application_key.length != 0) {
5397                 /*
5398                  * TODO: do not allow this...
5399                  *
5400                  * return NT_STATUS_INVALID_PARAMETER_MIX;
5401                  */
5402                 data_blob_clear_free(&session->smb1.application_key);
5403                 session->smb1.protected_key = false;
5404         }
5405
5406         if (_session_key.length == 0) {
5407                 return NT_STATUS_OK;
5408         }
5409
5410         ZERO_STRUCT(session_key);
5411         memcpy(session_key, _session_key.data,
5412                MIN(_session_key.length, sizeof(session_key)));
5413
5414         session->smb1.application_key = data_blob_talloc(session,
5415                                                          session_key,
5416                                                          sizeof(session_key));
5417         ZERO_STRUCT(session_key);
5418         if (session->smb1.application_key.data == NULL) {
5419                 return NT_STATUS_NO_MEMORY;
5420         }
5421
5422         session->smb1.protected_key = false;
5423
5424         return NT_STATUS_OK;
5425 }
5426
5427 NTSTATUS smb1cli_session_protect_session_key(struct smbXcli_session *session)
5428 {
5429         if (session->smb1.protected_key) {
5430                 /* already protected */
5431                 return NT_STATUS_OK;
5432         }
5433
5434         if (session->smb1.application_key.length != 16) {
5435                 return NT_STATUS_INVALID_PARAMETER_MIX;
5436         }
5437
5438         smb_key_derivation(session->smb1.application_key.data,
5439                            session->smb1.application_key.length,
5440                            session->smb1.application_key.data);
5441
5442         session->smb1.protected_key = true;
5443
5444         return NT_STATUS_OK;
5445 }
5446
5447 uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
5448 {
5449         struct smbXcli_conn *conn = session->conn;
5450         uint8_t security_mode = 0;
5451
5452         if (conn == NULL) {
5453                 return security_mode;
5454         }
5455
5456         security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
5457         if (conn->mandatory_signing) {
5458                 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5459         }
5460         if (session->smb2->should_sign) {
5461                 security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
5462         }
5463
5464         return security_mode;
5465 }
5466
5467 uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
5468 {
5469         return session->smb2->session_id;
5470 }
5471
5472 uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
5473 {
5474         return session->smb2->session_flags;
5475 }
5476
5477 void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
5478                                       uint64_t session_id,
5479                                       uint16_t session_flags)
5480 {
5481         session->smb2->session_id = session_id;
5482         session->smb2->session_flags = session_flags;
5483 }
5484
5485 void smb2cli_session_increment_channel_sequence(struct smbXcli_session *session)
5486 {
5487         session->smb2->channel_sequence += 1;
5488 }
5489
5490 uint16_t smb2cli_session_reset_channel_sequence(struct smbXcli_session *session,
5491                                                 uint16_t channel_sequence)
5492 {
5493         uint16_t prev_cs;
5494
5495         prev_cs = session->smb2->channel_sequence;
5496         session->smb2->channel_sequence = channel_sequence;
5497
5498         return prev_cs;
5499 }
5500
5501 uint16_t smb2cli_session_current_channel_sequence(struct smbXcli_session *session)
5502 {
5503         return session->smb2->channel_sequence;
5504 }
5505
5506 void smb2cli_session_start_replay(struct smbXcli_session *session)
5507 {
5508         session->smb2->replay_active = true;
5509 }
5510
5511 void smb2cli_session_stop_replay(struct smbXcli_session *session)
5512 {
5513         session->smb2->replay_active = false;
5514 }
5515
5516 NTSTATUS smb2cli_session_update_preauth(struct smbXcli_session *session,
5517                                         const struct iovec *iov)
5518 {
5519         struct hc_sha512state sctx;
5520         size_t i;
5521
5522         if (session->conn == NULL) {
5523                 return NT_STATUS_INTERNAL_ERROR;
5524         }
5525
5526         if (session->conn->protocol < PROTOCOL_SMB3_10) {
5527                 return NT_STATUS_OK;
5528         }
5529
5530         if (session->smb2_channel.signing_key.length != 0) {
5531                 return NT_STATUS_OK;
5532         }
5533
5534         samba_SHA512_Init(&sctx);
5535         samba_SHA512_Update(&sctx, session->smb2_channel.preauth_sha512,
5536                       sizeof(session->smb2_channel.preauth_sha512));
5537         for (i = 0; i < 3; i++) {
5538                 samba_SHA512_Update(&sctx, iov[i].iov_base, iov[i].iov_len);
5539         }
5540         samba_SHA512_Final(session->smb2_channel.preauth_sha512, &sctx);
5541
5542         return NT_STATUS_OK;
5543 }
5544
5545 NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
5546                                          const DATA_BLOB _session_key,
5547                                          const struct iovec *recv_iov)
5548 {
5549         struct smbXcli_conn *conn = session->conn;
5550         uint16_t no_sign_flags;
5551         uint8_t session_key[16];
5552         bool check_signature = true;
5553         uint32_t hdr_flags;
5554         NTSTATUS status;
5555         struct _derivation {
5556                 DATA_BLOB label;
5557                 DATA_BLOB context;
5558         };
5559         struct {
5560                 struct _derivation signing;
5561                 struct _derivation encryption;
5562                 struct _derivation decryption;
5563                 struct _derivation application;
5564         } derivation = { };
5565         size_t nonce_size = 0;
5566
5567         if (conn == NULL) {
5568                 return NT_STATUS_INVALID_PARAMETER_MIX;
5569         }
5570
5571         if (recv_iov[0].iov_len != SMB2_HDR_BODY) {
5572                 return NT_STATUS_INVALID_PARAMETER_MIX;
5573         }
5574
5575         no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
5576
5577         if (session->smb2->session_flags & no_sign_flags) {
5578                 session->smb2->should_sign = false;
5579                 return NT_STATUS_OK;
5580         }
5581
5582         if (session->smb2->signing_key.length != 0) {
5583                 return NT_STATUS_INVALID_PARAMETER_MIX;
5584         }
5585
5586         if (conn->protocol >= PROTOCOL_SMB3_10) {
5587                 struct _derivation *d;
5588                 DATA_BLOB p;
5589
5590                 p = data_blob_const(session->smb2_channel.preauth_sha512,
5591                                 sizeof(session->smb2_channel.preauth_sha512));
5592
5593                 d = &derivation.signing;
5594                 d->label = data_blob_string_const_null("SMBSigningKey");
5595                 d->context = p;
5596
5597                 d = &derivation.encryption;
5598                 d->label = data_blob_string_const_null("SMBC2SCipherKey");
5599                 d->context = p;
5600
5601                 d = &derivation.decryption;
5602                 d->label = data_blob_string_const_null("SMBS2CCipherKey");
5603                 d->context = p;
5604
5605                 d = &derivation.application;
5606                 d->label = data_blob_string_const_null("SMBAppKey");
5607                 d->context = p;
5608
5609         } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5610                 struct _derivation *d;
5611
5612                 d = &derivation.signing;
5613                 d->label = data_blob_string_const_null("SMB2AESCMAC");
5614                 d->context = data_blob_string_const_null("SmbSign");
5615
5616                 d = &derivation.encryption;
5617                 d->label = data_blob_string_const_null("SMB2AESCCM");
5618                 d->context = data_blob_string_const_null("ServerIn ");
5619
5620                 d = &derivation.decryption;
5621                 d->label = data_blob_string_const_null("SMB2AESCCM");
5622                 d->context = data_blob_string_const_null("ServerOut");
5623
5624                 d = &derivation.application;
5625                 d->label = data_blob_string_const_null("SMB2APP");
5626                 d->context = data_blob_string_const_null("SmbRpc");
5627         }
5628
5629         ZERO_STRUCT(session_key);
5630         memcpy(session_key, _session_key.data,
5631                MIN(_session_key.length, sizeof(session_key)));
5632
5633         session->smb2->signing_key = data_blob_talloc(session,
5634                                                      session_key,
5635                                                      sizeof(session_key));
5636         if (session->smb2->signing_key.data == NULL) {
5637                 ZERO_STRUCT(session_key);
5638                 return NT_STATUS_NO_MEMORY;
5639         }
5640
5641         if (conn->protocol >= PROTOCOL_SMB2_24) {
5642                 struct _derivation *d = &derivation.signing;
5643
5644                 smb2_key_derivation(session_key, sizeof(session_key),
5645                                     d->label.data, d->label.length,
5646                                     d->context.data, d->context.length,
5647                                     session->smb2->signing_key.data);
5648         }
5649
5650         session->smb2->encryption_key = data_blob_dup_talloc(session,
5651                                                 session->smb2->signing_key);
5652         if (session->smb2->encryption_key.data == NULL) {
5653                 ZERO_STRUCT(session_key);
5654                 return NT_STATUS_NO_MEMORY;
5655         }
5656
5657         if (conn->protocol >= PROTOCOL_SMB2_24) {
5658                 struct _derivation *d = &derivation.encryption;
5659
5660                 smb2_key_derivation(session_key, sizeof(session_key),
5661                                     d->label.data, d->label.length,
5662                                     d->context.data, d->context.length,
5663                                     session->smb2->encryption_key.data);
5664         }
5665
5666         session->smb2->decryption_key = data_blob_dup_talloc(session,
5667                                                 session->smb2->signing_key);
5668         if (session->smb2->decryption_key.data == NULL) {
5669                 ZERO_STRUCT(session_key);
5670                 return NT_STATUS_NO_MEMORY;
5671         }
5672
5673         if (conn->protocol >= PROTOCOL_SMB2_24) {
5674                 struct _derivation *d = &derivation.decryption;
5675
5676                 smb2_key_derivation(session_key, sizeof(session_key),
5677                                     d->label.data, d->label.length,
5678                                     d->context.data, d->context.length,
5679                                     session->smb2->decryption_key.data);
5680         }
5681
5682         session->smb2->application_key = data_blob_dup_talloc(session,
5683                                                 session->smb2->signing_key);
5684         if (session->smb2->application_key.data == NULL) {
5685                 ZERO_STRUCT(session_key);
5686                 return NT_STATUS_NO_MEMORY;
5687         }
5688
5689         if (conn->protocol >= PROTOCOL_SMB2_24) {
5690                 struct _derivation *d = &derivation.application;
5691
5692                 smb2_key_derivation(session_key, sizeof(session_key),
5693                                     d->label.data, d->label.length,
5694                                     d->context.data, d->context.length,
5695                                     session->smb2->application_key.data);
5696         }
5697         ZERO_STRUCT(session_key);
5698
5699         session->smb2_channel.signing_key = data_blob_dup_talloc(session,
5700                                                 session->smb2->signing_key);
5701         if (session->smb2_channel.signing_key.data == NULL) {
5702                 return NT_STATUS_NO_MEMORY;
5703         }
5704
5705         check_signature = conn->mandatory_signing;
5706
5707         hdr_flags = IVAL(recv_iov[0].iov_base, SMB2_HDR_FLAGS);
5708         if (hdr_flags & SMB2_HDR_FLAG_SIGNED) {
5709                 /*
5710                  * Sadly some vendors don't sign the
5711                  * final SMB2 session setup response
5712                  *
5713                  * At least Windows and Samba are always doing this
5714                  * if there's a session key available.
5715                  *
5716                  * We only check the signature if it's mandatory
5717                  * or SMB2_HDR_FLAG_SIGNED is provided.
5718                  */
5719                 check_signature = true;
5720         }
5721
5722         if (conn->protocol >= PROTOCOL_SMB3_10) {
5723                 check_signature = true;
5724         }
5725
5726         if (check_signature) {
5727                 status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5728                                                 session->conn->protocol,
5729                                                 recv_iov, 3);
5730                 if (!NT_STATUS_IS_OK(status)) {
5731                         return status;
5732                 }
5733         }
5734
5735         session->smb2->should_sign = false;
5736         session->smb2->should_encrypt = false;
5737
5738         if (conn->desire_signing) {
5739                 session->smb2->should_sign = true;
5740         }
5741
5742         if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
5743                 session->smb2->should_sign = true;
5744         }
5745
5746         if (session->smb2->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) {
5747                 session->smb2->should_encrypt = true;
5748         }
5749
5750         if (conn->protocol < PROTOCOL_SMB2_24) {
5751                 session->smb2->should_encrypt = false;
5752         }
5753
5754         if (conn->smb2.server.cipher == 0) {
5755                 session->smb2->should_encrypt = false;
5756         }
5757
5758         /*
5759          * CCM and GCM algorithms must never have their
5760          * nonce wrap, or the security of the whole
5761          * communication and the keys is destroyed.
5762          * We must drop the connection once we have
5763          * transfered too much data.
5764          *
5765          * NOTE: We assume nonces greater than 8 bytes.
5766          */
5767         generate_random_buffer((uint8_t *)&session->smb2->nonce_high_random,
5768                                sizeof(session->smb2->nonce_high_random));
5769         switch (conn->smb2.server.cipher) {
5770         case SMB2_ENCRYPTION_AES128_CCM:
5771                 nonce_size = AES_CCM_128_NONCE_SIZE;
5772                 break;
5773         case SMB2_ENCRYPTION_AES128_GCM:
5774                 nonce_size = AES_GCM_128_IV_SIZE;
5775                 break;
5776         default:
5777                 nonce_size = 0;
5778                 break;
5779         }
5780         session->smb2->nonce_high_max = SMB2_NONCE_HIGH_MAX(nonce_size);
5781         session->smb2->nonce_high = 0;
5782         session->smb2->nonce_low = 0;
5783
5784         return NT_STATUS_OK;
5785 }
5786
5787 NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
5788                                         struct smbXcli_session *session1,
5789                                         struct smbXcli_conn *conn,
5790                                         struct smbXcli_session **_session2)
5791 {
5792         struct smbXcli_session *session2;
5793
5794         if (session1->smb2->signing_key.length == 0) {
5795                 return NT_STATUS_INVALID_PARAMETER_MIX;
5796         }
5797
5798         if (conn == NULL) {
5799                 return NT_STATUS_INVALID_PARAMETER_MIX;
5800         }
5801
5802         session2 = talloc_zero(mem_ctx, struct smbXcli_session);
5803         if (session2 == NULL) {
5804                 return NT_STATUS_NO_MEMORY;
5805         }
5806         session2->smb2 = talloc_reference(session2, session1->smb2);
5807         if (session2->smb2 == NULL) {
5808                 talloc_free(session2);
5809                 return NT_STATUS_NO_MEMORY;
5810         }
5811
5812         talloc_set_destructor(session2, smbXcli_session_destructor);
5813         DLIST_ADD_END(conn->sessions, session2);
5814         session2->conn = conn;
5815
5816         memcpy(session2->smb2_channel.preauth_sha512,
5817                conn->smb2.preauth_sha512,
5818                sizeof(session2->smb2_channel.preauth_sha512));
5819
5820         *_session2 = session2;
5821         return NT_STATUS_OK;
5822 }
5823
5824 NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
5825                                          const DATA_BLOB _channel_key,
5826                                          const struct iovec *recv_iov)
5827 {
5828         struct smbXcli_conn *conn = session->conn;
5829         uint8_t channel_key[16];
5830         NTSTATUS status;
5831         struct _derivation {
5832                 DATA_BLOB label;
5833                 DATA_BLOB context;
5834         };
5835         struct {
5836                 struct _derivation signing;
5837         } derivation = { };
5838
5839         if (conn == NULL) {
5840                 return NT_STATUS_INVALID_PARAMETER_MIX;
5841         }
5842
5843         if (session->smb2_channel.signing_key.length != 0) {
5844                 return NT_STATUS_INVALID_PARAMETER_MIX;
5845         }
5846
5847         if (conn->protocol >= PROTOCOL_SMB3_10) {
5848                 struct _derivation *d;
5849                 DATA_BLOB p;
5850
5851                 p = data_blob_const(session->smb2_channel.preauth_sha512,
5852                                 sizeof(session->smb2_channel.preauth_sha512));
5853
5854                 d = &derivation.signing;
5855                 d->label = data_blob_string_const_null("SMBSigningKey");
5856                 d->context = p;
5857         } else if (conn->protocol >= PROTOCOL_SMB2_24) {
5858                 struct _derivation *d;
5859
5860                 d = &derivation.signing;
5861                 d->label = data_blob_string_const_null("SMB2AESCMAC");
5862                 d->context = data_blob_string_const_null("SmbSign");
5863         }
5864
5865         ZERO_STRUCT(channel_key);
5866         memcpy(channel_key, _channel_key.data,
5867                MIN(_channel_key.length, sizeof(channel_key)));
5868
5869         session->smb2_channel.signing_key = data_blob_talloc(session,
5870                                                 channel_key,
5871                                                 sizeof(channel_key));
5872         if (session->smb2_channel.signing_key.data == NULL) {
5873                 ZERO_STRUCT(channel_key);
5874                 return NT_STATUS_NO_MEMORY;
5875         }
5876
5877         if (conn->protocol >= PROTOCOL_SMB2_24) {
5878                 struct _derivation *d = &derivation.signing;
5879
5880                 smb2_key_derivation(channel_key, sizeof(channel_key),
5881                                     d->label.data, d->label.length,
5882                                     d->context.data, d->context.length,
5883                                     session->smb2_channel.signing_key.data);
5884         }
5885         ZERO_STRUCT(channel_key);
5886
5887         status = smb2_signing_check_pdu(session->smb2_channel.signing_key,
5888                                         session->conn->protocol,
5889                                         recv_iov, 3);
5890         if (!NT_STATUS_IS_OK(status)) {
5891                 return status;
5892         }
5893
5894         return NT_STATUS_OK;
5895 }
5896
5897 NTSTATUS smb2cli_session_encryption_on(struct smbXcli_session *session)
5898 {
5899         if (!session->smb2->should_sign) {
5900                 /*
5901                  * We need required signing on the session
5902                  * in order to prevent man in the middle attacks.
5903                  */
5904                 return NT_STATUS_INVALID_PARAMETER_MIX;
5905         }
5906
5907         if (session->smb2->should_encrypt) {
5908                 return NT_STATUS_OK;
5909         }
5910
5911         if (session->conn->protocol < PROTOCOL_SMB2_24) {
5912                 return NT_STATUS_NOT_SUPPORTED;
5913         }
5914
5915         if (session->conn->smb2.server.cipher == 0) {
5916                 return NT_STATUS_NOT_SUPPORTED;
5917         }
5918
5919         if (session->smb2->signing_key.data == NULL) {
5920                 return NT_STATUS_NOT_SUPPORTED;
5921         }
5922         session->smb2->should_encrypt = true;
5923         return NT_STATUS_OK;
5924 }
5925
5926 struct smbXcli_tcon *smbXcli_tcon_create(TALLOC_CTX *mem_ctx)
5927 {
5928         struct smbXcli_tcon *tcon;
5929
5930         tcon = talloc_zero(mem_ctx, struct smbXcli_tcon);
5931         if (tcon == NULL) {
5932                 return NULL;
5933         }
5934
5935         return tcon;
5936 }
5937
5938 void smbXcli_tcon_set_fs_attributes(struct smbXcli_tcon *tcon,
5939                                     uint32_t fs_attributes)
5940 {
5941         tcon->fs_attributes = fs_attributes;
5942 }
5943
5944 uint32_t smbXcli_tcon_get_fs_attributes(struct smbXcli_tcon *tcon)
5945 {
5946         return tcon->fs_attributes;
5947 }
5948
5949 bool smbXcli_tcon_is_dfs_share(struct smbXcli_tcon *tcon)
5950 {
5951         if (tcon == NULL) {
5952                 return false;
5953         }
5954
5955         if (tcon->is_smb1) {
5956                 if (tcon->smb1.optional_support & SMB_SHARE_IN_DFS) {
5957                         return true;
5958                 }
5959
5960                 return false;
5961         }
5962
5963         if (tcon->smb2.capabilities & SMB2_SHARE_CAP_DFS) {
5964                 return true;
5965         }
5966
5967         return false;
5968 }
5969
5970 uint16_t smb1cli_tcon_current_id(struct smbXcli_tcon *tcon)
5971 {
5972         return tcon->smb1.tcon_id;
5973 }
5974
5975 void smb1cli_tcon_set_id(struct smbXcli_tcon *tcon, uint16_t tcon_id)
5976 {
5977         tcon->is_smb1 = true;
5978         tcon->smb1.tcon_id = tcon_id;
5979 }
5980
5981 bool smb1cli_tcon_set_values(struct smbXcli_tcon *tcon,
5982                              uint16_t tcon_id,
5983                              uint16_t optional_support,
5984                              uint32_t maximal_access,
5985                              uint32_t guest_maximal_access,
5986                              const char *service,
5987                              const char *fs_type)
5988 {
5989         tcon->is_smb1 = true;
5990         tcon->fs_attributes = 0;
5991         tcon->smb1.tcon_id = tcon_id;
5992         tcon->smb1.optional_support = optional_support;
5993         tcon->smb1.maximal_access = maximal_access;
5994         tcon->smb1.guest_maximal_access = guest_maximal_access;
5995
5996         TALLOC_FREE(tcon->smb1.service);
5997         tcon->smb1.service = talloc_strdup(tcon, service);
5998         if (service != NULL && tcon->smb1.service == NULL) {
5999                 return false;
6000         }
6001
6002         TALLOC_FREE(tcon->smb1.fs_type);
6003         tcon->smb1.fs_type = talloc_strdup(tcon, fs_type);
6004         if (fs_type != NULL && tcon->smb1.fs_type == NULL) {
6005                 return false;
6006         }
6007
6008         return true;
6009 }
6010
6011 uint32_t smb2cli_tcon_current_id(struct smbXcli_tcon *tcon)
6012 {
6013         return tcon->smb2.tcon_id;
6014 }
6015
6016 uint32_t smb2cli_tcon_capabilities(struct smbXcli_tcon *tcon)
6017 {
6018         return tcon->smb2.capabilities;
6019 }
6020
6021 uint32_t smb2cli_tcon_flags(struct smbXcli_tcon *tcon)
6022 {
6023         return tcon->smb2.flags;
6024 }
6025
6026 void smb2cli_tcon_set_values(struct smbXcli_tcon *tcon,
6027                              struct smbXcli_session *session,
6028                              uint32_t tcon_id,
6029                              uint8_t type,
6030                              uint32_t flags,
6031                              uint32_t capabilities,
6032                              uint32_t maximal_access)
6033 {
6034         tcon->is_smb1 = false;
6035         tcon->fs_attributes = 0;
6036         tcon->smb2.tcon_id = tcon_id;
6037         tcon->smb2.type = type;
6038         tcon->smb2.flags = flags;
6039         tcon->smb2.capabilities = capabilities;
6040         tcon->smb2.maximal_access = maximal_access;
6041
6042         tcon->smb2.should_sign = false;
6043         tcon->smb2.should_encrypt = false;
6044
6045         if (session == NULL) {
6046                 return;
6047         }
6048
6049         tcon->smb2.should_sign = session->smb2->should_sign;
6050         tcon->smb2.should_encrypt = session->smb2->should_encrypt;
6051
6052         if (flags & SMB2_SHAREFLAG_ENCRYPT_DATA) {
6053                 tcon->smb2.should_encrypt = true;
6054         }
6055 }
6056
6057 void smb2cli_tcon_should_sign(struct smbXcli_tcon *tcon,
6058                               bool should_sign)
6059 {
6060         tcon->smb2.should_sign = should_sign;
6061 }
6062
6063 bool smb2cli_tcon_is_signing_on(struct smbXcli_tcon *tcon)
6064 {
6065         if (tcon->smb2.should_encrypt) {
6066                 return true;
6067         }
6068
6069         return tcon->smb2.should_sign;
6070 }
6071
6072 void smb2cli_tcon_should_encrypt(struct smbXcli_tcon *tcon,
6073                                  bool should_encrypt)
6074 {
6075         tcon->smb2.should_encrypt = should_encrypt;
6076 }
6077
6078 bool smb2cli_tcon_is_encryption_on(struct smbXcli_tcon *tcon)
6079 {
6080         return tcon->smb2.should_encrypt;
6081 }