source3/rpc_client/cli_pipe.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client routines
   4  *  Largely rewritten by Jeremy Allison             2005.
   5  *  Heavily modified by Simo Sorce                  2010.
   6  *  Copyright Andrew Bartlett                       2011.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 3 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "includes.h"
  23 #include "../lib/util/tevent_ntstatus.h"
  24 #include "librpc/gen_ndr/ndr_epmapper_c.h"
  25 #include "../librpc/gen_ndr/ndr_schannel.h"
  26 #include "../librpc/gen_ndr/ndr_dssetup.h"
  27 #include "../libcli/auth/schannel.h"
  28 #include "../libcli/auth/spnego.h"
  29 #include "../auth/ntlmssp/ntlmssp.h"
  30 #include "auth_generic.h"
  31 #include "librpc/gen_ndr/ndr_dcerpc.h"
  32 #include "librpc/gen_ndr/ndr_netlogon_c.h"
  33 #include "librpc/rpc/dcerpc.h"
  34 #include "rpc_dce.h"
  35 #include "cli_pipe.h"
  36 #include "libsmb/libsmb.h"
  37 #include "auth/gensec/gensec.h"
  38 #include "auth/credentials/credentials.h"
  39 #include "../libcli/smb/smbXcli_base.h"
  40
  41 #undef DBGC_CLASS
  42 #define DBGC_CLASS DBGC_RPC_CLI
  43
  44 /********************************************************************
  45  Pipe description for a DEBUG
  46  ********************************************************************/
  47 static const char *rpccli_pipe_txt(TALLOC_CTX *mem_ctx,
  48                                    struct rpc_pipe_client *cli)
  49 {
  50         char *result = talloc_asprintf(mem_ctx, "host %s", cli->desthost);
  51         if (result == NULL) {
  52                 return "pipe";
  53         }
  54         return result;
  55 }
  56
  57 /********************************************************************
  58  Rpc pipe call id.
  59  ********************************************************************/
  60
  61 static uint32 get_rpc_call_id(void)
  62 {
  63         static uint32 call_id = 0;
  64         return ++call_id;
  65 }
  66
  67 /*******************************************************************
  68  Use SMBreadX to get rest of one fragment's worth of rpc data.
  69  Reads the whole size or give an error message
  70  ********************************************************************/
  71
  72 struct rpc_read_state {
  73         struct event_context *ev;
  74         struct rpc_cli_transport *transport;
  75         uint8_t *data;
  76         size_t size;
  77         size_t num_read;
  78 };
  79
  80 static void rpc_read_done(struct tevent_req *subreq);
  81
  82 static struct tevent_req *rpc_read_send(TALLOC_CTX *mem_ctx,
  83                                         struct event_context *ev,
  84                                         struct rpc_cli_transport *transport,
  85                                         uint8_t *data, size_t size)
  86 {
  87         struct tevent_req *req, *subreq;
  88         struct rpc_read_state *state;
  89
  90         req = tevent_req_create(mem_ctx, &state, struct rpc_read_state);
  91         if (req == NULL) {
  92                 return NULL;
  93         }
  94         state->ev = ev;
  95         state->transport = transport;
  96         state->data = data;
  97         state->size = size;
  98         state->num_read = 0;
  99
 100         DEBUG(5, ("rpc_read_send: data_to_read: %u\n", (unsigned int)size));
 101
 102         subreq = transport->read_send(state, ev, (uint8_t *)data, size,
 103                                       transport->priv);
 104         if (subreq == NULL) {
 105                 goto fail;
 106         }
 107         tevent_req_set_callback(subreq, rpc_read_done, req);
 108         return req;
 109
 110  fail:
 111         TALLOC_FREE(req);
 112         return NULL;
 113 }
 114
 115 static void rpc_read_done(struct tevent_req *subreq)
 116 {
 117         struct tevent_req *req = tevent_req_callback_data(
 118                 subreq, struct tevent_req);
 119         struct rpc_read_state *state = tevent_req_data(
 120                 req, struct rpc_read_state);
 121         NTSTATUS status;
 122         ssize_t received;
 123
 124         status = state->transport->read_recv(subreq, &received);
 125         TALLOC_FREE(subreq);
 126         if (!NT_STATUS_IS_OK(status)) {
 127                 tevent_req_nterror(req, status);
 128                 return;
 129         }
 130
 131         state->num_read += received;
 132         if (state->num_read == state->size) {
 133                 tevent_req_done(req);
 134                 return;
 135         }
 136
 137         subreq = state->transport->read_send(state, state->ev,
 138                                              state->data + state->num_read,
 139                                              state->size - state->num_read,
 140                                              state->transport->priv);
 141         if (tevent_req_nomem(subreq, req)) {
 142                 return;
 143         }
 144         tevent_req_set_callback(subreq, rpc_read_done, req);
 145 }
 146
 147 static NTSTATUS rpc_read_recv(struct tevent_req *req)
 148 {
 149         return tevent_req_simple_recv_ntstatus(req);
 150 }
 151
 152 struct rpc_write_state {
 153         struct event_context *ev;
 154         struct rpc_cli_transport *transport;
 155         const uint8_t *data;
 156         size_t size;
 157         size_t num_written;
 158 };
 159
 160 static void rpc_write_done(struct tevent_req *subreq);
 161
 162 static struct tevent_req *rpc_write_send(TALLOC_CTX *mem_ctx,
 163                                          struct event_context *ev,
 164                                          struct rpc_cli_transport *transport,
 165                                          const uint8_t *data, size_t size)
 166 {
 167         struct tevent_req *req, *subreq;
 168         struct rpc_write_state *state;
 169
 170         req = tevent_req_create(mem_ctx, &state, struct rpc_write_state);
 171         if (req == NULL) {
 172                 return NULL;
 173         }
 174         state->ev = ev;
 175         state->transport = transport;
 176         state->data = data;
 177         state->size = size;
 178         state->num_written = 0;
 179
 180         DEBUG(5, ("rpc_write_send: data_to_write: %u\n", (unsigned int)size));
 181
 182         subreq = transport->write_send(state, ev, data, size, transport->priv);
 183         if (subreq == NULL) {
 184                 goto fail;
 185         }
 186         tevent_req_set_callback(subreq, rpc_write_done, req);
 187         return req;
 188  fail:
 189         TALLOC_FREE(req);
 190         return NULL;
 191 }
 192
 193 static void rpc_write_done(struct tevent_req *subreq)
 194 {
 195         struct tevent_req *req = tevent_req_callback_data(
 196                 subreq, struct tevent_req);
 197         struct rpc_write_state *state = tevent_req_data(
 198                 req, struct rpc_write_state);
 199         NTSTATUS status;
 200         ssize_t written;
 201
 202         status = state->transport->write_recv(subreq, &written);
 203         TALLOC_FREE(subreq);
 204         if (!NT_STATUS_IS_OK(status)) {
 205                 tevent_req_nterror(req, status);
 206                 return;
 207         }
 208
 209         state->num_written += written;
 210
 211         if (state->num_written == state->size) {
 212                 tevent_req_done(req);
 213                 return;
 214         }
 215
 216         subreq = state->transport->write_send(state, state->ev,
 217                                               state->data + state->num_written,
 218                                               state->size - state->num_written,
 219                                               state->transport->priv);
 220         if (tevent_req_nomem(subreq, req)) {
 221                 return;
 222         }
 223         tevent_req_set_callback(subreq, rpc_write_done, req);
 224 }
 225
 226 static NTSTATUS rpc_write_recv(struct tevent_req *req)
 227 {
 228         return tevent_req_simple_recv_ntstatus(req);
 229 }
 230
 231
 232 /****************************************************************************
 233  Try and get a PDU's worth of data from current_pdu. If not, then read more
 234  from the wire.
 235  ****************************************************************************/
 236
 237 struct get_complete_frag_state {
 238         struct event_context *ev;
 239         struct rpc_pipe_client *cli;
 240         uint16_t frag_len;
 241         DATA_BLOB *pdu;
 242 };
 243
 244 static void get_complete_frag_got_header(struct tevent_req *subreq);
 245 static void get_complete_frag_got_rest(struct tevent_req *subreq);
 246
 247 static struct tevent_req *get_complete_frag_send(TALLOC_CTX *mem_ctx,
 248                                                  struct event_context *ev,
 249                                                  struct rpc_pipe_client *cli,
 250                                                  DATA_BLOB *pdu)
 251 {
 252         struct tevent_req *req, *subreq;
 253         struct get_complete_frag_state *state;
 254         size_t received;
 255         NTSTATUS status;
 256
 257         req = tevent_req_create(mem_ctx, &state,
 258                                 struct get_complete_frag_state);
 259         if (req == NULL) {
 260                 return NULL;
 261         }
 262         state->ev = ev;
 263         state->cli = cli;
 264         state->frag_len = RPC_HEADER_LEN;
 265         state->pdu = pdu;
 266
 267         received = pdu->length;
 268         if (received < RPC_HEADER_LEN) {
 269                 if (!data_blob_realloc(mem_ctx, pdu, RPC_HEADER_LEN)) {
 270                         status = NT_STATUS_NO_MEMORY;
 271                         goto post_status;
 272                 }
 273                 subreq = rpc_read_send(state, state->ev,
 274                                         state->cli->transport,
 275                                         pdu->data + received,
 276                                         RPC_HEADER_LEN - received);
 277                 if (subreq == NULL) {
 278                         status = NT_STATUS_NO_MEMORY;
 279                         goto post_status;
 280                 }
 281                 tevent_req_set_callback(subreq, get_complete_frag_got_header,
 282                                         req);
 283                 return req;
 284         }
 285
 286         state->frag_len = dcerpc_get_frag_length(pdu);
 287
 288         /*
 289          * Ensure we have frag_len bytes of data.
 290          */
 291         if (received < state->frag_len) {
 292                 if (!data_blob_realloc(NULL, pdu, state->frag_len)) {
 293                         status = NT_STATUS_NO_MEMORY;
 294                         goto post_status;
 295                 }
 296                 subreq = rpc_read_send(state, state->ev,
 297                                         state->cli->transport,
 298                                         pdu->data + received,
 299                                         state->frag_len - received);
 300                 if (subreq == NULL) {
 301                         status = NT_STATUS_NO_MEMORY;
 302                         goto post_status;
 303                 }
 304                 tevent_req_set_callback(subreq, get_complete_frag_got_rest,
 305                                         req);
 306                 return req;
 307         }
 308
 309         status = NT_STATUS_OK;
 310  post_status:
 311         if (NT_STATUS_IS_OK(status)) {
 312                 tevent_req_done(req);
 313         } else {
 314                 tevent_req_nterror(req, status);
 315         }
 316         return tevent_req_post(req, ev);
 317 }
 318
 319 static void get_complete_frag_got_header(struct tevent_req *subreq)
 320 {
 321         struct tevent_req *req = tevent_req_callback_data(
 322                 subreq, struct tevent_req);
 323         struct get_complete_frag_state *state = tevent_req_data(
 324                 req, struct get_complete_frag_state);
 325         NTSTATUS status;
 326
 327         status = rpc_read_recv(subreq);
 328         TALLOC_FREE(subreq);
 329         if (!NT_STATUS_IS_OK(status)) {
 330                 tevent_req_nterror(req, status);
 331                 return;
 332         }
 333
 334         state->frag_len = dcerpc_get_frag_length(state->pdu);
 335
 336         if (!data_blob_realloc(NULL, state->pdu, state->frag_len)) {
 337                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 338                 return;
 339         }
 340
 341         /*
 342          * We're here in this piece of code because we've read exactly
 343          * RPC_HEADER_LEN bytes into state->pdu.
 344          */
 345
 346         subreq = rpc_read_send(state, state->ev, state->cli->transport,
 347                                 state->pdu->data + RPC_HEADER_LEN,
 348                                 state->frag_len - RPC_HEADER_LEN);
 349         if (tevent_req_nomem(subreq, req)) {
 350                 return;
 351         }
 352         tevent_req_set_callback(subreq, get_complete_frag_got_rest, req);
 353 }
 354
 355 static void get_complete_frag_got_rest(struct tevent_req *subreq)
 356 {
 357         struct tevent_req *req = tevent_req_callback_data(
 358                 subreq, struct tevent_req);
 359         NTSTATUS status;
 360
 361         status = rpc_read_recv(subreq);
 362         TALLOC_FREE(subreq);
 363         if (!NT_STATUS_IS_OK(status)) {
 364                 tevent_req_nterror(req, status);
 365                 return;
 366         }
 367         tevent_req_done(req);
 368 }
 369
 370 static NTSTATUS get_complete_frag_recv(struct tevent_req *req)
 371 {
 372         return tevent_req_simple_recv_ntstatus(req);
 373 }
 374
 375 /****************************************************************************
 376  Do basic authentication checks on an incoming pdu.
 377  ****************************************************************************/
 378
 379 static NTSTATUS cli_pipe_validate_current_pdu(TALLOC_CTX *mem_ctx,
 380                                                 struct rpc_pipe_client *cli,
 381                                                 struct ncacn_packet *pkt,
 382                                                 DATA_BLOB *pdu,
 383                                                 uint8_t expected_pkt_type,
 384                                                 DATA_BLOB *rdata,
 385                                                 DATA_BLOB *reply_pdu)
 386 {
 387         struct dcerpc_response *r;
 388         NTSTATUS ret = NT_STATUS_OK;
 389         size_t pad_len = 0;
 390
 391         /*
 392          * Point the return values at the real data including the RPC
 393          * header. Just in case the caller wants it.
 394          */
 395         *rdata = *pdu;
 396
 397         /* Ensure we have the correct type. */
 398         switch (pkt->ptype) {
 399         case DCERPC_PKT_ALTER_RESP:
 400         case DCERPC_PKT_BIND_ACK:
 401
 402                 /* Client code never receives this kind of packets */
 403                 break;
 404
 405
 406         case DCERPC_PKT_RESPONSE:
 407
 408                 r = &pkt->u.response;
 409
 410                 /* Here's where we deal with incoming sign/seal. */
 411                 ret = dcerpc_check_auth(cli->auth, pkt,
 412                                         &r->stub_and_verifier,
 413                                         DCERPC_RESPONSE_LENGTH,
 414                                         pdu, &pad_len);
 415                 if (!NT_STATUS_IS_OK(ret)) {
 416                         return ret;
 417                 }
 418
 419                 if (pkt->frag_length < DCERPC_RESPONSE_LENGTH + pad_len) {
 420                         return NT_STATUS_BUFFER_TOO_SMALL;
 421                 }
 422
 423                 /* Point the return values at the NDR data. */
 424                 rdata->data = r->stub_and_verifier.data;
 425
 426                 if (pkt->auth_length) {
 427                         /* We've already done integer wrap tests in
 428                          * dcerpc_check_auth(). */
 429                         rdata->length = r->stub_and_verifier.length
 430                                          - pad_len
 431                                          - DCERPC_AUTH_TRAILER_LENGTH
 432                                          - pkt->auth_length;
 433                 } else {
 434                         rdata->length = r->stub_and_verifier.length;
 435                 }
 436
 437                 DEBUG(10, ("Got pdu len %lu, data_len %lu, ss_len %u\n",
 438                            (long unsigned int)pdu->length,
 439                            (long unsigned int)rdata->length,
 440                            (unsigned int)pad_len));
 441
 442                 /*
 443                  * If this is the first reply, and the allocation hint is
 444                  * reasonable, try and set up the reply_pdu DATA_BLOB to the
 445                  * correct size.
 446                  */
 447
 448                 if ((reply_pdu->length == 0) &&
 449                     r->alloc_hint && (r->alloc_hint < 15*1024*1024)) {
 450                         if (!data_blob_realloc(mem_ctx, reply_pdu,
 451                                                         r->alloc_hint)) {
 452                                 DEBUG(0, ("reply alloc hint %d too "
 453                                           "large to allocate\n",
 454                                           (int)r->alloc_hint));
 455                                 return NT_STATUS_NO_MEMORY;
 456                         }
 457                 }
 458
 459                 break;
 460
 461         case DCERPC_PKT_BIND_NAK:
 462                 DEBUG(1, (__location__ ": Bind NACK received from %s!\n",
 463                           rpccli_pipe_txt(talloc_tos(), cli)));
 464                 /* Use this for now... */
 465                 return NT_STATUS_NETWORK_ACCESS_DENIED;
 466
 467         case DCERPC_PKT_FAULT:
 468
 469                 DEBUG(1, (__location__ ": RPC fault code %s received "
 470                           "from %s!\n",
 471                           dcerpc_errstr(talloc_tos(),
 472                           pkt->u.fault.status),
 473                           rpccli_pipe_txt(talloc_tos(), cli)));
 474
 475                 return dcerpc_fault_to_nt_status(pkt->u.fault.status);
 476
 477         default:
 478                 DEBUG(0, (__location__ "Unknown packet type %u received "
 479                           "from %s!\n",
 480                           (unsigned int)pkt->ptype,
 481                           rpccli_pipe_txt(talloc_tos(), cli)));
 482                 return NT_STATUS_INVALID_INFO_CLASS;
 483         }
 484
 485         if (pkt->ptype != expected_pkt_type) {
 486                 DEBUG(3, (__location__ ": Connection to %s got an unexpected "
 487                           "RPC packet type - %u, not %u\n",
 488                           rpccli_pipe_txt(talloc_tos(), cli),
 489                           pkt->ptype, expected_pkt_type));
 490                 return NT_STATUS_INVALID_INFO_CLASS;
 491         }
 492
 493         /* Do this just before return - we don't want to modify any rpc header
 494            data before now as we may have needed to do cryptographic actions on
 495            it before. */
 496
 497         if ((pkt->ptype == DCERPC_PKT_BIND_ACK) &&
 498             !(pkt->pfc_flags & DCERPC_PFC_FLAG_LAST)) {
 499                 DEBUG(5, (__location__ ": bug in server (AS/U?), setting "
 500                           "fragment first/last ON.\n"));
 501                 pkt->pfc_flags |= DCERPC_PFC_FLAG_FIRST | DCERPC_PFC_FLAG_LAST;
 502         }
 503
 504         return NT_STATUS_OK;
 505 }
 506
 507 /****************************************************************************
 508  Call a remote api on an arbitrary pipe.  takes param, data and setup buffers.
 509 ****************************************************************************/
 510
 511 struct cli_api_pipe_state {
 512         struct event_context *ev;
 513         struct rpc_cli_transport *transport;
 514         uint8_t *rdata;
 515         uint32_t rdata_len;
 516 };
 517
 518 static void cli_api_pipe_trans_done(struct tevent_req *subreq);
 519 static void cli_api_pipe_write_done(struct tevent_req *subreq);
 520 static void cli_api_pipe_read_done(struct tevent_req *subreq);
 521
 522 static struct tevent_req *cli_api_pipe_send(TALLOC_CTX *mem_ctx,
 523                                             struct event_context *ev,
 524                                             struct rpc_cli_transport *transport,
 525                                             uint8_t *data, size_t data_len,
 526                                             uint32_t max_rdata_len)
 527 {
 528         struct tevent_req *req, *subreq;
 529         struct cli_api_pipe_state *state;
 530         NTSTATUS status;
 531
 532         req = tevent_req_create(mem_ctx, &state, struct cli_api_pipe_state);
 533         if (req == NULL) {
 534                 return NULL;
 535         }
 536         state->ev = ev;
 537         state->transport = transport;
 538
 539         if (max_rdata_len < RPC_HEADER_LEN) {
 540                 /*
 541                  * For a RPC reply we always need at least RPC_HEADER_LEN
 542                  * bytes. We check this here because we will receive
 543                  * RPC_HEADER_LEN bytes in cli_trans_sock_send_done.
 544                  */
 545                 status = NT_STATUS_INVALID_PARAMETER;
 546                 goto post_status;
 547         }
 548
 549         if (transport->trans_send != NULL) {
 550                 subreq = transport->trans_send(state, ev, data, data_len,
 551                                                max_rdata_len, transport->priv);
 552                 if (subreq == NULL) {
 553                         goto fail;
 554                 }
 555                 tevent_req_set_callback(subreq, cli_api_pipe_trans_done, req);
 556                 return req;
 557         }
 558
 559         /*
 560          * If the transport does not provide a "trans" routine, i.e. for
 561          * example the ncacn_ip_tcp transport, do the write/read step here.
 562          */
 563
 564         subreq = rpc_write_send(state, ev, transport, data, data_len);
 565         if (subreq == NULL) {
 566                 goto fail;
 567         }
 568         tevent_req_set_callback(subreq, cli_api_pipe_write_done, req);
 569         return req;
 570
 571  post_status:
 572         tevent_req_nterror(req, status);
 573         return tevent_req_post(req, ev);
 574  fail:
 575         TALLOC_FREE(req);
 576         return NULL;
 577 }
 578
 579 static void cli_api_pipe_trans_done(struct tevent_req *subreq)
 580 {
 581         struct tevent_req *req = tevent_req_callback_data(
 582                 subreq, struct tevent_req);
 583         struct cli_api_pipe_state *state = tevent_req_data(
 584                 req, struct cli_api_pipe_state);
 585         NTSTATUS status;
 586
 587         status = state->transport->trans_recv(subreq, state, &state->rdata,
 588                                               &state->rdata_len);
 589         TALLOC_FREE(subreq);
 590         if (!NT_STATUS_IS_OK(status)) {
 591                 tevent_req_nterror(req, status);
 592                 return;
 593         }
 594         tevent_req_done(req);
 595 }
 596
 597 static void cli_api_pipe_write_done(struct tevent_req *subreq)
 598 {
 599         struct tevent_req *req = tevent_req_callback_data(
 600                 subreq, struct tevent_req);
 601         struct cli_api_pipe_state *state = tevent_req_data(
 602                 req, struct cli_api_pipe_state);
 603         NTSTATUS status;
 604
 605         status = rpc_write_recv(subreq);
 606         TALLOC_FREE(subreq);
 607         if (!NT_STATUS_IS_OK(status)) {
 608                 tevent_req_nterror(req, status);
 609                 return;
 610         }
 611
 612         state->rdata = talloc_array(state, uint8_t, RPC_HEADER_LEN);
 613         if (tevent_req_nomem(state->rdata, req)) {
 614                 return;
 615         }
 616
 617         /*
 618          * We don't need to use rpc_read_send here, the upper layer will cope
 619          * with a short read, transport->trans_send could also return less
 620          * than state->max_rdata_len.
 621          */
 622         subreq = state->transport->read_send(state, state->ev, state->rdata,
 623                                              RPC_HEADER_LEN,
 624                                              state->transport->priv);
 625         if (tevent_req_nomem(subreq, req)) {
 626                 return;
 627         }
 628         tevent_req_set_callback(subreq, cli_api_pipe_read_done, req);
 629 }
 630
 631 static void cli_api_pipe_read_done(struct tevent_req *subreq)
 632 {
 633         struct tevent_req *req = tevent_req_callback_data(
 634                 subreq, struct tevent_req);
 635         struct cli_api_pipe_state *state = tevent_req_data(
 636                 req, struct cli_api_pipe_state);
 637         NTSTATUS status;
 638         ssize_t received;
 639
 640         status = state->transport->read_recv(subreq, &received);
 641         TALLOC_FREE(subreq);
 642         if (!NT_STATUS_IS_OK(status)) {
 643                 tevent_req_nterror(req, status);
 644                 return;
 645         }
 646         state->rdata_len = received;
 647         tevent_req_done(req);
 648 }
 649
 650 static NTSTATUS cli_api_pipe_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 651                                   uint8_t **prdata, uint32_t *prdata_len)
 652 {
 653         struct cli_api_pipe_state *state = tevent_req_data(
 654                 req, struct cli_api_pipe_state);
 655         NTSTATUS status;
 656
 657         if (tevent_req_is_nterror(req, &status)) {
 658                 return status;
 659         }
 660
 661         *prdata = talloc_move(mem_ctx, &state->rdata);
 662         *prdata_len = state->rdata_len;
 663         return NT_STATUS_OK;
 664 }
 665
 666 /****************************************************************************
 667  Send data on an rpc pipe via trans. The data must be the last
 668  pdu fragment of an NDR data stream.
 669
 670  Receive response data from an rpc pipe, which may be large...
 671
 672  Read the first fragment: unfortunately have to use SMBtrans for the first
 673  bit, then SMBreadX for subsequent bits.
 674
 675  If first fragment received also wasn't the last fragment, continue
 676  getting fragments until we _do_ receive the last fragment.
 677
 678  Request/Response PDU's look like the following...
 679
 680  |<------------------PDU len----------------------------------------------->|
 681  |<-HDR_LEN-->|<--REQ LEN------>|.............|<-AUTH_HDRLEN->|<-AUTH_LEN-->|
 682
 683  +------------+-----------------+-------------+---------------+-------------+
 684  | RPC HEADER | REQ/RESP HEADER | DATA ...... | AUTH_HDR      | AUTH DATA   |
 685  +------------+-----------------+-------------+---------------+-------------+
 686
 687  Where the presence of the AUTH_HDR and AUTH DATA are dependent on the
 688  signing & sealing being negotiated.
 689
 690  ****************************************************************************/
 691
 692 struct rpc_api_pipe_state {
 693         struct event_context *ev;
 694         struct rpc_pipe_client *cli;
 695         uint8_t expected_pkt_type;
 696
 697         DATA_BLOB incoming_frag;
 698         struct ncacn_packet *pkt;
 699
 700         /* Incoming reply */
 701         DATA_BLOB reply_pdu;
 702         size_t reply_pdu_offset;
 703         uint8_t endianess;
 704 };
 705
 706 static void rpc_api_pipe_trans_done(struct tevent_req *subreq);
 707 static void rpc_api_pipe_got_pdu(struct tevent_req *subreq);
 708 static void rpc_api_pipe_auth3_done(struct tevent_req *subreq);
 709
 710 static struct tevent_req *rpc_api_pipe_send(TALLOC_CTX *mem_ctx,
 711                                             struct event_context *ev,
 712                                             struct rpc_pipe_client *cli,
 713                                             DATA_BLOB *data, /* Outgoing PDU */
 714                                             uint8_t expected_pkt_type)
 715 {
 716         struct tevent_req *req, *subreq;
 717         struct rpc_api_pipe_state *state;
 718         uint16_t max_recv_frag;
 719         NTSTATUS status;
 720
 721         req = tevent_req_create(mem_ctx, &state, struct rpc_api_pipe_state);
 722         if (req == NULL) {
 723                 return NULL;
 724         }
 725         state->ev = ev;
 726         state->cli = cli;
 727         state->expected_pkt_type = expected_pkt_type;
 728         state->incoming_frag = data_blob_null;
 729         state->reply_pdu = data_blob_null;
 730         state->reply_pdu_offset = 0;
 731         state->endianess = DCERPC_DREP_LE;
 732
 733         /*
 734          * Ensure we're not sending too much.
 735          */
 736         if (data->length > cli->max_xmit_frag) {
 737                 status = NT_STATUS_INVALID_PARAMETER;
 738                 goto post_status;
 739         }
 740
 741         DEBUG(5,("rpc_api_pipe: %s\n", rpccli_pipe_txt(talloc_tos(), cli)));
 742
 743         if (state->expected_pkt_type == DCERPC_PKT_AUTH3) {
 744                 subreq = rpc_write_send(state, ev, cli->transport,
 745                                         data->data, data->length);
 746                 if (subreq == NULL) {
 747                         goto fail;
 748                 }
 749                 tevent_req_set_callback(subreq, rpc_api_pipe_auth3_done, req);
 750                 return req;
 751         }
 752
 753         /* get the header first, then fetch the rest once we have
 754          * the frag_length available */
 755         max_recv_frag = RPC_HEADER_LEN;
 756
 757         subreq = cli_api_pipe_send(state, ev, cli->transport,
 758                                    data->data, data->length, max_recv_frag);
 759         if (subreq == NULL) {
 760                 goto fail;
 761         }
 762         tevent_req_set_callback(subreq, rpc_api_pipe_trans_done, req);
 763         return req;
 764
 765  post_status:
 766         tevent_req_nterror(req, status);
 767         return tevent_req_post(req, ev);
 768  fail:
 769         TALLOC_FREE(req);
 770         return NULL;
 771 }
 772
 773 static void rpc_api_pipe_auth3_done(struct tevent_req *subreq)
 774 {
 775         struct tevent_req *req =
 776                 tevent_req_callback_data(subreq,
 777                 struct tevent_req);
 778         NTSTATUS status;
 779
 780         status = rpc_write_recv(subreq);
 781         TALLOC_FREE(subreq);
 782         if (!NT_STATUS_IS_OK(status)) {
 783                 tevent_req_nterror(req, status);
 784                 return;
 785         }
 786
 787         tevent_req_done(req);
 788 }
 789
 790 static void rpc_api_pipe_trans_done(struct tevent_req *subreq)
 791 {
 792         struct tevent_req *req = tevent_req_callback_data(
 793                 subreq, struct tevent_req);
 794         struct rpc_api_pipe_state *state = tevent_req_data(
 795                 req, struct rpc_api_pipe_state);
 796         NTSTATUS status;
 797         uint8_t *rdata = NULL;
 798         uint32_t rdata_len = 0;
 799
 800         status = cli_api_pipe_recv(subreq, state, &rdata, &rdata_len);
 801         TALLOC_FREE(subreq);
 802         if (!NT_STATUS_IS_OK(status)) {
 803                 DEBUG(5, ("cli_api_pipe failed: %s\n", nt_errstr(status)));
 804                 tevent_req_nterror(req, status);
 805                 return;
 806         }
 807
 808         if (rdata == NULL) {
 809                 DEBUG(3,("rpc_api_pipe: %s failed to return data.\n",
 810                          rpccli_pipe_txt(talloc_tos(), state->cli)));
 811                 tevent_req_done(req);
 812                 return;
 813         }
 814
 815         /*
 816          * Move data on state->incoming_frag.
 817          */
 818         state->incoming_frag.data = talloc_move(state, &rdata);
 819         state->incoming_frag.length = rdata_len;
 820         if (!state->incoming_frag.data) {
 821                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 822                 return;
 823         }
 824
 825         /* Ensure we have enough data for a pdu. */
 826         subreq = get_complete_frag_send(state, state->ev, state->cli,
 827                                         &state->incoming_frag);
 828         if (tevent_req_nomem(subreq, req)) {
 829                 return;
 830         }
 831         tevent_req_set_callback(subreq, rpc_api_pipe_got_pdu, req);
 832 }
 833
 834 static void rpc_api_pipe_got_pdu(struct tevent_req *subreq)
 835 {
 836         struct tevent_req *req = tevent_req_callback_data(
 837                 subreq, struct tevent_req);
 838         struct rpc_api_pipe_state *state = tevent_req_data(
 839                 req, struct rpc_api_pipe_state);
 840         NTSTATUS status;
 841         DATA_BLOB rdata = data_blob_null;
 842
 843         status = get_complete_frag_recv(subreq);
 844         TALLOC_FREE(subreq);
 845         if (!NT_STATUS_IS_OK(status)) {
 846                 DEBUG(5, ("get_complete_frag failed: %s\n",
 847                           nt_errstr(status)));
 848                 tevent_req_nterror(req, status);
 849                 return;
 850         }
 851
 852         state->pkt = talloc(state, struct ncacn_packet);
 853         if (!state->pkt) {
 854                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 855                 return;
 856         }
 857
 858         status = dcerpc_pull_ncacn_packet(state->pkt,
 859                                           &state->incoming_frag,
 860                                           state->pkt,
 861                                           !state->endianess);
 862         if (!NT_STATUS_IS_OK(status)) {
 863                 tevent_req_nterror(req, status);
 864                 return;
 865         }
 866
 867         if (state->incoming_frag.length != state->pkt->frag_length) {
 868                 DEBUG(5, ("Incorrect pdu length %u, expected %u\n",
 869                           (unsigned int)state->incoming_frag.length,
 870                           (unsigned int)state->pkt->frag_length));
 871                 tevent_req_nterror(req,  NT_STATUS_INVALID_PARAMETER);
 872                 return;
 873         }
 874
 875         status = cli_pipe_validate_current_pdu(state,
 876                                                 state->cli, state->pkt,
 877                                                 &state->incoming_frag,
 878                                                 state->expected_pkt_type,
 879                                                 &rdata,
 880                                                 &state->reply_pdu);
 881
 882         DEBUG(10,("rpc_api_pipe: got frag len of %u at offset %u: %s\n",
 883                   (unsigned)state->incoming_frag.length,
 884                   (unsigned)state->reply_pdu_offset,
 885                   nt_errstr(status)));
 886
 887         if (!NT_STATUS_IS_OK(status)) {
 888                 tevent_req_nterror(req, status);
 889                 return;
 890         }
 891
 892         if ((state->pkt->pfc_flags & DCERPC_PFC_FLAG_FIRST)
 893             && (state->pkt->drep[0] != DCERPC_DREP_LE)) {
 894                 /*
 895                  * Set the data type correctly for big-endian data on the
 896                  * first packet.
 897                  */
 898                 DEBUG(10,("rpc_api_pipe: On %s PDU data format is "
 899                           "big-endian.\n",
 900                           rpccli_pipe_txt(talloc_tos(), state->cli)));
 901                 state->endianess = 0x00; /* BIG ENDIAN */
 902         }
 903         /*
 904          * Check endianness on subsequent packets.
 905          */
 906         if (state->endianess != state->pkt->drep[0]) {
 907                 DEBUG(0,("rpc_api_pipe: Error : Endianness changed from %s to "
 908                          "%s\n",
 909                          state->endianess?"little":"big",
 910                          state->pkt->drep[0]?"little":"big"));
 911                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 912                 return;
 913         }
 914
 915         /* Now copy the data portion out of the pdu into rbuf. */
 916         if (state->reply_pdu.length < state->reply_pdu_offset + rdata.length) {
 917                 if (!data_blob_realloc(NULL, &state->reply_pdu,
 918                                 state->reply_pdu_offset + rdata.length)) {
 919                         tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 920                         return;
 921                 }
 922         }
 923
 924         memcpy(state->reply_pdu.data + state->reply_pdu_offset,
 925                 rdata.data, rdata.length);
 926         state->reply_pdu_offset += rdata.length;
 927
 928         /* reset state->incoming_frag, there is no need to free it,
 929          * it will be reallocated to the right size the next time
 930          * it is used */
 931         state->incoming_frag.length = 0;
 932
 933         if (state->pkt->pfc_flags & DCERPC_PFC_FLAG_LAST) {
 934                 /* make sure the pdu length is right now that we
 935                  * have all the data available (alloc hint may
 936                  * have allocated more than was actually used) */
 937                 state->reply_pdu.length = state->reply_pdu_offset;
 938                 DEBUG(10,("rpc_api_pipe: %s returned %u bytes.\n",
 939                           rpccli_pipe_txt(talloc_tos(), state->cli),
 940                           (unsigned)state->reply_pdu.length));
 941                 tevent_req_done(req);
 942                 return;
 943         }
 944
 945         subreq = get_complete_frag_send(state, state->ev, state->cli,
 946                                         &state->incoming_frag);
 947         if (tevent_req_nomem(subreq, req)) {
 948                 return;
 949         }
 950         tevent_req_set_callback(subreq, rpc_api_pipe_got_pdu, req);
 951 }
 952
 953 static NTSTATUS rpc_api_pipe_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 954                                   struct ncacn_packet **pkt,
 955                                   DATA_BLOB *reply_pdu)
 956 {
 957         struct rpc_api_pipe_state *state = tevent_req_data(
 958                 req, struct rpc_api_pipe_state);
 959         NTSTATUS status;
 960
 961         if (tevent_req_is_nterror(req, &status)) {
 962                 return status;
 963         }
 964
 965         /* return data to caller and assign it ownership of memory */
 966         if (reply_pdu) {
 967                 reply_pdu->data = talloc_move(mem_ctx, &state->reply_pdu.data);
 968                 reply_pdu->length = state->reply_pdu.length;
 969                 state->reply_pdu.length = 0;
 970         } else {
 971                 data_blob_free(&state->reply_pdu);
 972         }
 973
 974         if (pkt) {
 975                 *pkt = talloc_steal(mem_ctx, state->pkt);
 976         }
 977
 978         return NT_STATUS_OK;
 979 }
 980
 981 /*******************************************************************
 982  Creates NTLMSSP auth bind.
 983  ********************************************************************/
 984
 985 static NTSTATUS create_generic_auth_rpc_bind_req(struct rpc_pipe_client *cli,
 986                                                  TALLOC_CTX *mem_ctx,
 987                                                  DATA_BLOB *auth_token)
 988 {
 989         struct gensec_security *gensec_security;
 990         DATA_BLOB null_blob = data_blob_null;
 991
 992         gensec_security = talloc_get_type_abort(cli->auth->auth_ctx,
 993                                         struct gensec_security);
 994
 995         DEBUG(5, ("create_generic_auth_rpc_bind_req: generate first token\n"));
 996         return gensec_update(gensec_security, mem_ctx, NULL, null_blob, auth_token);
 997 }
 998
 999 /*******************************************************************
1000  Creates schannel auth bind.
1001  ********************************************************************/
1002
1003 static NTSTATUS create_schannel_auth_rpc_bind_req(struct rpc_pipe_client *cli,
1004                                                   DATA_BLOB *auth_token)
1005 {
1006         NTSTATUS status;
1007         struct NL_AUTH_MESSAGE r;
1008
1009         /* Use lp_workgroup() if domain not specified */
1010
1011         if (!cli->auth->domain || !cli->auth->domain[0]) {
1012                 cli->auth->domain = talloc_strdup(cli, lp_workgroup());
1013                 if (cli->auth->domain == NULL) {
1014                         return NT_STATUS_NO_MEMORY;
1015                 }
1016         }
1017
1018         /*
1019          * Now marshall the data into the auth parse_struct.
1020          */
1021
1022         r.MessageType                   = NL_NEGOTIATE_REQUEST;
1023         r.Flags                         = NL_FLAG_OEM_NETBIOS_DOMAIN_NAME |
1024                                           NL_FLAG_OEM_NETBIOS_COMPUTER_NAME;
1025         r.oem_netbios_domain.a          = cli->auth->domain;
1026         r.oem_netbios_computer.a        = lp_netbios_name();
1027
1028         status = dcerpc_push_schannel_bind(cli, &r, auth_token);
1029         if (!NT_STATUS_IS_OK(status)) {
1030                 return status;
1031         }
1032
1033         return NT_STATUS_OK;
1034 }
1035
1036 /*******************************************************************
1037  Creates the internals of a DCE/RPC bind request or alter context PDU.
1038  ********************************************************************/
1039
1040 static NTSTATUS create_bind_or_alt_ctx_internal(TALLOC_CTX *mem_ctx,
1041                                                 enum dcerpc_pkt_type ptype,
1042                                                 uint32 rpc_call_id,
1043                                                 const struct ndr_syntax_id *abstract,
1044                                                 const struct ndr_syntax_id *transfer,
1045                                                 const DATA_BLOB *auth_info,
1046                                                 DATA_BLOB *blob)
1047 {
1048         uint16 auth_len = auth_info->length;
1049         NTSTATUS status;
1050         union dcerpc_payload u;
1051         struct dcerpc_ctx_list ctx_list;
1052
1053         if (auth_len) {
1054                 auth_len -= DCERPC_AUTH_TRAILER_LENGTH;
1055         }
1056
1057         ctx_list.context_id = 0;
1058         ctx_list.num_transfer_syntaxes = 1;
1059         ctx_list.abstract_syntax = *abstract;
1060         ctx_list.transfer_syntaxes = (struct ndr_syntax_id *)discard_const(transfer);
1061
1062         u.bind.max_xmit_frag    = RPC_MAX_PDU_FRAG_LEN;
1063         u.bind.max_recv_frag    = RPC_MAX_PDU_FRAG_LEN;
1064         u.bind.assoc_group_id   = 0x0;
1065         u.bind.num_contexts     = 1;
1066         u.bind.ctx_list         = &ctx_list;
1067         u.bind.auth_info        = *auth_info;
1068
1069         status = dcerpc_push_ncacn_packet(mem_ctx,
1070                                           ptype,
1071                                           DCERPC_PFC_FLAG_FIRST |
1072                                           DCERPC_PFC_FLAG_LAST,
1073                                           auth_len,
1074                                           rpc_call_id,
1075                                           &u,
1076                                           blob);
1077         if (!NT_STATUS_IS_OK(status)) {
1078                 DEBUG(0, ("Failed to marshall bind/alter ncacn_packet.\n"));
1079                 return status;
1080         }
1081
1082         return NT_STATUS_OK;
1083 }
1084
1085 /*******************************************************************
1086  Creates a DCE/RPC bind request.
1087  ********************************************************************/
1088
1089 static NTSTATUS create_rpc_bind_req(TALLOC_CTX *mem_ctx,
1090                                     struct rpc_pipe_client *cli,
1091                                     struct pipe_auth_data *auth,
1092                                     uint32 rpc_call_id,
1093                                     const struct ndr_syntax_id *abstract,
1094                                     const struct ndr_syntax_id *transfer,
1095                                     DATA_BLOB *rpc_out)
1096 {
1097         DATA_BLOB auth_token = data_blob_null;
1098         DATA_BLOB auth_info = data_blob_null;
1099         NTSTATUS ret = NT_STATUS_OK;
1100
1101         switch (auth->auth_type) {
1102         case DCERPC_AUTH_TYPE_SCHANNEL:
1103                 ret = create_schannel_auth_rpc_bind_req(cli, &auth_token);
1104                 if (!NT_STATUS_IS_OK(ret)) {
1105                         return ret;
1106                 }
1107                 break;
1108
1109         case DCERPC_AUTH_TYPE_NTLMSSP:
1110         case DCERPC_AUTH_TYPE_KRB5:
1111         case DCERPC_AUTH_TYPE_SPNEGO:
1112                 ret = create_generic_auth_rpc_bind_req(cli, mem_ctx, &auth_token);
1113
1114                 if (!NT_STATUS_IS_OK(ret) &&
1115                     !NT_STATUS_EQUAL(ret, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1116                         return ret;
1117                 }
1118                 break;
1119
1120         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1121                 auth_token = data_blob_talloc(mem_ctx,
1122                                               "NCALRPC_AUTH_TOKEN",
1123                                               18);
1124                 break;
1125
1126         case DCERPC_AUTH_TYPE_NONE:
1127                 break;
1128
1129         default:
1130                 /* "Can't" happen. */
1131                 return NT_STATUS_INVALID_INFO_CLASS;
1132         }
1133
1134         if (auth_token.length != 0) {
1135                 ret = dcerpc_push_dcerpc_auth(cli,
1136                                                 auth->auth_type,
1137                                                 auth->auth_level,
1138                                                 0, /* auth_pad_length */
1139                                                 1, /* auth_context_id */
1140                                                 &auth_token,
1141                                                 &auth_info);
1142                 if (!NT_STATUS_IS_OK(ret)) {
1143                         return ret;
1144                 }
1145                 data_blob_free(&auth_token);
1146         }
1147
1148         ret = create_bind_or_alt_ctx_internal(mem_ctx,
1149                                               DCERPC_PKT_BIND,
1150                                               rpc_call_id,
1151                                               abstract,
1152                                               transfer,
1153                                               &auth_info,
1154                                               rpc_out);
1155         return ret;
1156 }
1157
1158 /*******************************************************************
1159  External interface.
1160  Does an rpc request on a pipe. Incoming data is NDR encoded in in_data.
1161  Reply is NDR encoded in out_data. Splits the data stream into RPC PDU's
1162  and deals with signing/sealing details.
1163  ********************************************************************/
1164
1165 struct rpc_api_pipe_req_state {
1166         struct event_context *ev;
1167         struct rpc_pipe_client *cli;
1168         uint8_t op_num;
1169         uint32_t call_id;
1170         DATA_BLOB *req_data;
1171         uint32_t req_data_sent;
1172         DATA_BLOB rpc_out;
1173         DATA_BLOB reply_pdu;
1174 };
1175
1176 static void rpc_api_pipe_req_write_done(struct tevent_req *subreq);
1177 static void rpc_api_pipe_req_done(struct tevent_req *subreq);
1178 static NTSTATUS prepare_next_frag(struct rpc_api_pipe_req_state *state,
1179                                   bool *is_last_frag);
1180
1181 struct tevent_req *rpc_api_pipe_req_send(TALLOC_CTX *mem_ctx,
1182                                          struct event_context *ev,
1183                                          struct rpc_pipe_client *cli,
1184                                          uint8_t op_num,
1185                                          DATA_BLOB *req_data)
1186 {
1187         struct tevent_req *req, *subreq;
1188         struct rpc_api_pipe_req_state *state;
1189         NTSTATUS status;
1190         bool is_last_frag;
1191
1192         req = tevent_req_create(mem_ctx, &state,
1193                                 struct rpc_api_pipe_req_state);
1194         if (req == NULL) {
1195                 return NULL;
1196         }
1197         state->ev = ev;
1198         state->cli = cli;
1199         state->op_num = op_num;
1200         state->req_data = req_data;
1201         state->req_data_sent = 0;
1202         state->call_id = get_rpc_call_id();
1203         state->reply_pdu = data_blob_null;
1204         state->rpc_out = data_blob_null;
1205
1206         if (cli->max_xmit_frag < DCERPC_REQUEST_LENGTH
1207                                         + RPC_MAX_SIGN_SIZE) {
1208                 /* Server is screwed up ! */
1209                 status = NT_STATUS_INVALID_PARAMETER;
1210                 goto post_status;
1211         }
1212
1213         status = prepare_next_frag(state, &is_last_frag);
1214         if (!NT_STATUS_IS_OK(status)) {
1215                 goto post_status;
1216         }
1217
1218         if (is_last_frag) {
1219                 subreq = rpc_api_pipe_send(state, ev, state->cli,
1220                                            &state->rpc_out,
1221                                            DCERPC_PKT_RESPONSE);
1222                 if (subreq == NULL) {
1223                         goto fail;
1224                 }
1225                 tevent_req_set_callback(subreq, rpc_api_pipe_req_done, req);
1226         } else {
1227                 subreq = rpc_write_send(state, ev, cli->transport,
1228                                         state->rpc_out.data,
1229                                         state->rpc_out.length);
1230                 if (subreq == NULL) {
1231                         goto fail;
1232                 }
1233                 tevent_req_set_callback(subreq, rpc_api_pipe_req_write_done,
1234                                         req);
1235         }
1236         return req;
1237
1238  post_status:
1239         tevent_req_nterror(req, status);
1240         return tevent_req_post(req, ev);
1241  fail:
1242         TALLOC_FREE(req);
1243         return NULL;
1244 }
1245
1246 static NTSTATUS prepare_next_frag(struct rpc_api_pipe_req_state *state,
1247                                   bool *is_last_frag)
1248 {
1249         size_t data_sent_thistime;
1250         size_t auth_len;
1251         size_t frag_len;
1252         uint8_t flags = 0;
1253         size_t pad_len;
1254         size_t data_left;
1255         NTSTATUS status;
1256         union dcerpc_payload u;
1257
1258         data_left = state->req_data->length - state->req_data_sent;
1259
1260         status = dcerpc_guess_sizes(state->cli->auth,
1261                                     DCERPC_REQUEST_LENGTH, data_left,
1262                                     state->cli->max_xmit_frag,
1263                                     CLIENT_NDR_PADDING_SIZE,
1264                                     &data_sent_thistime,
1265                                     &frag_len, &auth_len, &pad_len);
1266         if (!NT_STATUS_IS_OK(status)) {
1267                 return status;
1268         }
1269
1270         if (state->req_data_sent == 0) {
1271                 flags = DCERPC_PFC_FLAG_FIRST;
1272         }
1273
1274         if (data_sent_thistime == data_left) {
1275                 flags |= DCERPC_PFC_FLAG_LAST;
1276         }
1277
1278         data_blob_free(&state->rpc_out);
1279
1280         ZERO_STRUCT(u.request);
1281
1282         u.request.alloc_hint    = state->req_data->length;
1283         u.request.context_id    = 0;
1284         u.request.opnum         = state->op_num;
1285
1286         status = dcerpc_push_ncacn_packet(state,
1287                                           DCERPC_PKT_REQUEST,
1288                                           flags,
1289                                           auth_len,
1290                                           state->call_id,
1291                                           &u,
1292                                           &state->rpc_out);
1293         if (!NT_STATUS_IS_OK(status)) {
1294                 return status;
1295         }
1296
1297         /* explicitly set frag_len here as dcerpc_push_ncacn_packet() can't
1298          * compute it right for requests because the auth trailer is missing
1299          * at this stage */
1300         dcerpc_set_frag_length(&state->rpc_out, frag_len);
1301
1302         /* Copy in the data. */
1303         if (!data_blob_append(NULL, &state->rpc_out,
1304                                 state->req_data->data + state->req_data_sent,
1305                                 data_sent_thistime)) {
1306                 return NT_STATUS_NO_MEMORY;
1307         }
1308
1309         switch (state->cli->auth->auth_level) {
1310         case DCERPC_AUTH_LEVEL_NONE:
1311         case DCERPC_AUTH_LEVEL_CONNECT:
1312         case DCERPC_AUTH_LEVEL_PACKET:
1313                 break;
1314         case DCERPC_AUTH_LEVEL_INTEGRITY:
1315         case DCERPC_AUTH_LEVEL_PRIVACY:
1316                 status = dcerpc_add_auth_footer(state->cli->auth, pad_len,
1317                                                 &state->rpc_out);
1318                 if (!NT_STATUS_IS_OK(status)) {
1319                         return status;
1320                 }
1321                 break;
1322         default:
1323                 return NT_STATUS_INVALID_PARAMETER;
1324         }
1325
1326         state->req_data_sent += data_sent_thistime;
1327         *is_last_frag = ((flags & DCERPC_PFC_FLAG_LAST) != 0);
1328
1329         return status;
1330 }
1331
1332 static void rpc_api_pipe_req_write_done(struct tevent_req *subreq)
1333 {
1334         struct tevent_req *req = tevent_req_callback_data(
1335                 subreq, struct tevent_req);
1336         struct rpc_api_pipe_req_state *state = tevent_req_data(
1337                 req, struct rpc_api_pipe_req_state);
1338         NTSTATUS status;
1339         bool is_last_frag;
1340
1341         status = rpc_write_recv(subreq);
1342         TALLOC_FREE(subreq);
1343         if (!NT_STATUS_IS_OK(status)) {
1344                 tevent_req_nterror(req, status);
1345                 return;
1346         }
1347
1348         status = prepare_next_frag(state, &is_last_frag);
1349         if (!NT_STATUS_IS_OK(status)) {
1350                 tevent_req_nterror(req, status);
1351                 return;
1352         }
1353
1354         if (is_last_frag) {
1355                 subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1356                                            &state->rpc_out,
1357                                            DCERPC_PKT_RESPONSE);
1358                 if (tevent_req_nomem(subreq, req)) {
1359                         return;
1360                 }
1361                 tevent_req_set_callback(subreq, rpc_api_pipe_req_done, req);
1362         } else {
1363                 subreq = rpc_write_send(state, state->ev,
1364                                         state->cli->transport,
1365                                         state->rpc_out.data,
1366                                         state->rpc_out.length);
1367                 if (tevent_req_nomem(subreq, req)) {
1368                         return;
1369                 }
1370                 tevent_req_set_callback(subreq, rpc_api_pipe_req_write_done,
1371                                         req);
1372         }
1373 }
1374
1375 static void rpc_api_pipe_req_done(struct tevent_req *subreq)
1376 {
1377         struct tevent_req *req = tevent_req_callback_data(
1378                 subreq, struct tevent_req);
1379         struct rpc_api_pipe_req_state *state = tevent_req_data(
1380                 req, struct rpc_api_pipe_req_state);
1381         NTSTATUS status;
1382
1383         status = rpc_api_pipe_recv(subreq, state, NULL, &state->reply_pdu);
1384         TALLOC_FREE(subreq);
1385         if (!NT_STATUS_IS_OK(status)) {
1386                 tevent_req_nterror(req, status);
1387                 return;
1388         }
1389         tevent_req_done(req);
1390 }
1391
1392 NTSTATUS rpc_api_pipe_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
1393                                DATA_BLOB *reply_pdu)
1394 {
1395         struct rpc_api_pipe_req_state *state = tevent_req_data(
1396                 req, struct rpc_api_pipe_req_state);
1397         NTSTATUS status;
1398
1399         if (tevent_req_is_nterror(req, &status)) {
1400                 /*
1401                  * We always have to initialize to reply pdu, even if there is
1402                  * none. The rpccli_* caller routines expect this.
1403                  */
1404                 *reply_pdu = data_blob_null;
1405                 return status;
1406         }
1407
1408         /* return data to caller and assign it ownership of memory */
1409         reply_pdu->data = talloc_move(mem_ctx, &state->reply_pdu.data);
1410         reply_pdu->length = state->reply_pdu.length;
1411         state->reply_pdu.length = 0;
1412
1413         return NT_STATUS_OK;
1414 }
1415
1416 /****************************************************************************
1417  Check the rpc bind acknowledge response.
1418 ****************************************************************************/
1419
1420 static bool check_bind_response(const struct dcerpc_bind_ack *r,
1421                                 const struct ndr_syntax_id *transfer)
1422 {
1423         struct dcerpc_ack_ctx ctx;
1424
1425         if (r->secondary_address_size == 0) {
1426                 DEBUG(4,("Ignoring length check -- ASU bug (server didn't fill in the pipe name correctly)"));
1427         }
1428
1429         if (r->num_results < 1 || !r->ctx_list) {
1430                 return false;
1431         }
1432
1433         ctx = r->ctx_list[0];
1434
1435         /* check the transfer syntax */
1436         if ((ctx.syntax.if_version != transfer->if_version) ||
1437              (memcmp(&ctx.syntax.uuid, &transfer->uuid, sizeof(transfer->uuid)) !=0)) {
1438                 DEBUG(2,("bind_rpc_pipe: transfer syntax differs\n"));
1439                 return False;
1440         }
1441
1442         if (r->num_results != 0x1 || ctx.result != 0) {
1443                 DEBUG(2,("bind_rpc_pipe: bind denied results: %d reason: %x\n",
1444                           r->num_results, ctx.reason));
1445         }
1446
1447         DEBUG(5,("check_bind_response: accepted!\n"));
1448         return True;
1449 }
1450
1451 /*******************************************************************
1452  Creates a DCE/RPC bind authentication response.
1453  This is the packet that is sent back to the server once we
1454  have received a BIND-ACK, to finish the third leg of
1455  the authentication handshake.
1456  ********************************************************************/
1457
1458 static NTSTATUS create_rpc_bind_auth3(TALLOC_CTX *mem_ctx,
1459                                 struct rpc_pipe_client *cli,
1460                                 uint32 rpc_call_id,
1461                                 enum dcerpc_AuthType auth_type,
1462                                 enum dcerpc_AuthLevel auth_level,
1463                                 DATA_BLOB *pauth_blob,
1464                                 DATA_BLOB *rpc_out)
1465 {
1466         NTSTATUS status;
1467         union dcerpc_payload u;
1468
1469         u.auth3._pad = 0;
1470
1471         status = dcerpc_push_dcerpc_auth(mem_ctx,
1472                                          auth_type,
1473                                          auth_level,
1474                                          0, /* auth_pad_length */
1475                                          1, /* auth_context_id */
1476                                          pauth_blob,
1477                                          &u.auth3.auth_info);
1478         if (!NT_STATUS_IS_OK(status)) {
1479                 return status;
1480         }
1481
1482         status = dcerpc_push_ncacn_packet(mem_ctx,
1483                                           DCERPC_PKT_AUTH3,
1484                                           DCERPC_PFC_FLAG_FIRST |
1485                                           DCERPC_PFC_FLAG_LAST,
1486                                           pauth_blob->length,
1487                                           rpc_call_id,
1488                                           &u,
1489                                           rpc_out);
1490         data_blob_free(&u.auth3.auth_info);
1491         if (!NT_STATUS_IS_OK(status)) {
1492                 DEBUG(0,("create_bind_or_alt_ctx_internal: failed to marshall RPC_HDR_RB.\n"));
1493                 return status;
1494         }
1495
1496         return NT_STATUS_OK;
1497 }
1498
1499 /*******************************************************************
1500  Creates a DCE/RPC bind alter context authentication request which
1501  may contain a spnego auth blobl
1502  ********************************************************************/
1503
1504 static NTSTATUS create_rpc_alter_context(TALLOC_CTX *mem_ctx,
1505                                         enum dcerpc_AuthType auth_type,
1506                                         enum dcerpc_AuthLevel auth_level,
1507                                         uint32 rpc_call_id,
1508                                         const struct ndr_syntax_id *abstract,
1509                                         const struct ndr_syntax_id *transfer,
1510                                         const DATA_BLOB *pauth_blob, /* spnego auth blob already created. */
1511                                         DATA_BLOB *rpc_out)
1512 {
1513         DATA_BLOB auth_info;
1514         NTSTATUS status;
1515
1516         status = dcerpc_push_dcerpc_auth(mem_ctx,
1517                                          auth_type,
1518                                          auth_level,
1519                                          0, /* auth_pad_length */
1520                                          1, /* auth_context_id */
1521                                          pauth_blob,
1522                                          &auth_info);
1523         if (!NT_STATUS_IS_OK(status)) {
1524                 return status;
1525         }
1526
1527         status = create_bind_or_alt_ctx_internal(mem_ctx,
1528                                                  DCERPC_PKT_ALTER,
1529                                                  rpc_call_id,
1530                                                  abstract,
1531                                                  transfer,
1532                                                  &auth_info,
1533                                                  rpc_out);
1534         data_blob_free(&auth_info);
1535         return status;
1536 }
1537
1538 /****************************************************************************
1539  Do an rpc bind.
1540 ****************************************************************************/
1541
1542 struct rpc_pipe_bind_state {
1543         struct event_context *ev;
1544         struct rpc_pipe_client *cli;
1545         DATA_BLOB rpc_out;
1546         bool auth3;
1547         uint32_t rpc_call_id;
1548         struct netr_Authenticator auth;
1549         struct netr_Authenticator return_auth;
1550         struct netlogon_creds_CredentialState *creds;
1551         union netr_Capabilities capabilities;
1552         struct netr_LogonGetCapabilities r;
1553 };
1554
1555 static void rpc_pipe_bind_step_one_done(struct tevent_req *subreq);
1556 static void rpc_pipe_bind_step_two_trigger(struct tevent_req *req);
1557 static NTSTATUS rpc_bind_next_send(struct tevent_req *req,
1558                                    struct rpc_pipe_bind_state *state,
1559                                    DATA_BLOB *credentials);
1560 static NTSTATUS rpc_bind_finish_send(struct tevent_req *req,
1561                                      struct rpc_pipe_bind_state *state,
1562                                      DATA_BLOB *credentials);
1563
1564 struct tevent_req *rpc_pipe_bind_send(TALLOC_CTX *mem_ctx,
1565                                       struct event_context *ev,
1566                                       struct rpc_pipe_client *cli,
1567                                       struct pipe_auth_data *auth)
1568 {
1569         struct tevent_req *req, *subreq;
1570         struct rpc_pipe_bind_state *state;
1571         NTSTATUS status;
1572
1573         req = tevent_req_create(mem_ctx, &state, struct rpc_pipe_bind_state);
1574         if (req == NULL) {
1575                 return NULL;
1576         }
1577
1578         DEBUG(5,("Bind RPC Pipe: %s auth_type %u, auth_level %u\n",
1579                 rpccli_pipe_txt(talloc_tos(), cli),
1580                 (unsigned int)auth->auth_type,
1581                 (unsigned int)auth->auth_level ));
1582
1583         state->ev = ev;
1584         state->cli = cli;
1585         state->rpc_call_id = get_rpc_call_id();
1586
1587         cli->auth = talloc_move(cli, &auth);
1588
1589         /* Marshall the outgoing data. */
1590         status = create_rpc_bind_req(state, cli,
1591                                      cli->auth,
1592                                      state->rpc_call_id,
1593                                      &cli->abstract_syntax,
1594                                      &cli->transfer_syntax,
1595                                      &state->rpc_out);
1596
1597         if (!NT_STATUS_IS_OK(status) &&
1598             !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1599                 goto post_status;
1600         }
1601
1602         subreq = rpc_api_pipe_send(state, ev, cli, &state->rpc_out,
1603                                    DCERPC_PKT_BIND_ACK);
1604         if (subreq == NULL) {
1605                 goto fail;
1606         }
1607         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1608         return req;
1609
1610  post_status:
1611         tevent_req_nterror(req, status);
1612         return tevent_req_post(req, ev);
1613  fail:
1614         TALLOC_FREE(req);
1615         return NULL;
1616 }
1617
1618 static void rpc_pipe_bind_step_one_done(struct tevent_req *subreq)
1619 {
1620         struct tevent_req *req = tevent_req_callback_data(
1621                 subreq, struct tevent_req);
1622         struct rpc_pipe_bind_state *state = tevent_req_data(
1623                 req, struct rpc_pipe_bind_state);
1624         struct pipe_auth_data *pauth = state->cli->auth;
1625         struct gensec_security *gensec_security;
1626         struct ncacn_packet *pkt = NULL;
1627         struct dcerpc_auth auth;
1628         DATA_BLOB auth_token = data_blob_null;
1629         NTSTATUS status;
1630
1631         status = rpc_api_pipe_recv(subreq, talloc_tos(), &pkt, NULL);
1632         TALLOC_FREE(subreq);
1633         if (!NT_STATUS_IS_OK(status)) {
1634                 DEBUG(3, ("rpc_pipe_bind: %s bind request returned %s\n",
1635                           rpccli_pipe_txt(talloc_tos(), state->cli),
1636                           nt_errstr(status)));
1637                 tevent_req_nterror(req, status);
1638                 return;
1639         }
1640
1641         if (state->auth3) {
1642                 tevent_req_done(req);
1643                 return;
1644         }
1645
1646         if (!check_bind_response(&pkt->u.bind_ack, &state->cli->transfer_syntax)) {
1647                 DEBUG(2, ("rpc_pipe_bind: check_bind_response failed.\n"));
1648                 tevent_req_nterror(req, NT_STATUS_BUFFER_TOO_SMALL);
1649                 return;
1650         }
1651
1652         state->cli->max_xmit_frag = pkt->u.bind_ack.max_xmit_frag;
1653         state->cli->max_recv_frag = pkt->u.bind_ack.max_recv_frag;
1654
1655         switch(pauth->auth_type) {
1656
1657         case DCERPC_AUTH_TYPE_NONE:
1658         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1659                 /* Bind complete. */
1660                 tevent_req_done(req);
1661                 return;
1662
1663         case DCERPC_AUTH_TYPE_SCHANNEL:
1664                 rpc_pipe_bind_step_two_trigger(req);
1665                 return;
1666
1667         case DCERPC_AUTH_TYPE_NTLMSSP:
1668         case DCERPC_AUTH_TYPE_SPNEGO:
1669         case DCERPC_AUTH_TYPE_KRB5:
1670                 /* Paranoid lenght checks */
1671                 if (pkt->frag_length < DCERPC_AUTH_TRAILER_LENGTH
1672                                                 + pkt->auth_length) {
1673                         tevent_req_nterror(req,
1674                                         NT_STATUS_INFO_LENGTH_MISMATCH);
1675                         return;
1676                 }
1677                 /* get auth credentials */
1678                 status = dcerpc_pull_dcerpc_auth(talloc_tos(),
1679                                                  &pkt->u.bind_ack.auth_info,
1680                                                  &auth, false);
1681                 if (!NT_STATUS_IS_OK(status)) {
1682                         DEBUG(0, ("Failed to pull dcerpc auth: %s.\n",
1683                                   nt_errstr(status)));
1684                         tevent_req_nterror(req, status);
1685                         return;
1686                 }
1687                 break;
1688
1689         default:
1690                 goto err_out;
1691         }
1692
1693         /*
1694          * For authenticated binds we may need to do 3 or 4 leg binds.
1695          */
1696
1697         switch(pauth->auth_type) {
1698
1699         case DCERPC_AUTH_TYPE_NONE:
1700         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
1701         case DCERPC_AUTH_TYPE_SCHANNEL:
1702                 /* Bind complete. */
1703                 tevent_req_done(req);
1704                 return;
1705
1706         case DCERPC_AUTH_TYPE_NTLMSSP:
1707         case DCERPC_AUTH_TYPE_KRB5:
1708         case DCERPC_AUTH_TYPE_SPNEGO:
1709                 gensec_security = talloc_get_type_abort(pauth->auth_ctx,
1710                                                 struct gensec_security);
1711                 status = gensec_update(gensec_security, state, NULL,
1712                                        auth.credentials, &auth_token);
1713                 if (NT_STATUS_EQUAL(status,
1714                                     NT_STATUS_MORE_PROCESSING_REQUIRED)) {
1715                         status = rpc_bind_next_send(req, state,
1716                                                         &auth_token);
1717                 } else if (NT_STATUS_IS_OK(status)) {
1718                         if (auth_token.length == 0) {
1719                                 /* Bind complete. */
1720                                 tevent_req_done(req);
1721                                 return;
1722                         }
1723                         status = rpc_bind_finish_send(req, state,
1724                                                         &auth_token);
1725                 }
1726                 break;
1727
1728         default:
1729                 goto err_out;
1730         }
1731
1732         if (!NT_STATUS_IS_OK(status)) {
1733                 tevent_req_nterror(req, status);
1734         }
1735         return;
1736
1737 err_out:
1738         DEBUG(0,("cli_finish_bind_auth: unknown auth type %u\n",
1739                  (unsigned int)state->cli->auth->auth_type));
1740         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
1741 }
1742
1743 static void rpc_pipe_bind_step_two_done(struct tevent_req *subreq);
1744
1745 static void rpc_pipe_bind_step_two_trigger(struct tevent_req *req)
1746 {
1747         struct rpc_pipe_bind_state *state =
1748                 tevent_req_data(req,
1749                                 struct rpc_pipe_bind_state);
1750         struct dcerpc_binding_handle *b = state->cli->binding_handle;
1751         struct schannel_state *schannel_auth =
1752                 talloc_get_type_abort(state->cli->auth->auth_ctx,
1753                                       struct schannel_state);
1754         struct tevent_req *subreq;
1755
1756         if (schannel_auth == NULL ||
1757             !ndr_syntax_id_equal(&state->cli->abstract_syntax,
1758                                  &ndr_table_netlogon.syntax_id)) {
1759                 tevent_req_done(req);
1760                 return;
1761         }
1762
1763         ZERO_STRUCT(state->return_auth);
1764
1765         state->creds = netlogon_creds_copy(state, schannel_auth->creds);
1766         if (state->creds == NULL) {
1767                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1768                 return;
1769         }
1770
1771         netlogon_creds_client_authenticator(state->creds, &state->auth);
1772
1773         state->r.in.server_name = state->cli->srv_name_slash;
1774         state->r.in.computer_name = state->creds->computer_name;
1775         state->r.in.credential = &state->auth;
1776         state->r.in.query_level = 1;
1777         state->r.in.return_authenticator = &state->return_auth;
1778
1779         state->r.out.capabilities = &state->capabilities;
1780         state->r.out.return_authenticator = &state->return_auth;
1781
1782         subreq = dcerpc_netr_LogonGetCapabilities_r_send(talloc_tos(),
1783                                                          state->ev,
1784                                                          b,
1785                                                          &state->r);
1786         if (subreq == NULL) {
1787                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1788                 return;
1789         }
1790
1791         tevent_req_set_callback(subreq, rpc_pipe_bind_step_two_done, req);
1792         return;
1793 }
1794
1795 static void rpc_pipe_bind_step_two_done(struct tevent_req *subreq)
1796 {
1797         struct tevent_req *req =
1798                 tevent_req_callback_data(subreq,
1799                                          struct tevent_req);
1800         struct rpc_pipe_bind_state *state =
1801                 tevent_req_data(req,
1802                                 struct rpc_pipe_bind_state);
1803         struct schannel_state *schannel_auth =
1804                 talloc_get_type_abort(state->cli->auth->auth_ctx,
1805                                       struct schannel_state);
1806         NTSTATUS status;
1807
1808         status = dcerpc_netr_LogonGetCapabilities_r_recv(subreq, talloc_tos());
1809         TALLOC_FREE(subreq);
1810         if (NT_STATUS_EQUAL(status, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE)) {
1811                 if (state->cli->dc->negotiate_flags &
1812                     NETLOGON_NEG_SUPPORTS_AES) {
1813                         DEBUG(5, ("AES is not supported and the error was %s\n",
1814                                   nt_errstr(status)));
1815                         tevent_req_nterror(req,
1816                                            NT_STATUS_INVALID_NETWORK_RESPONSE);
1817                         return;
1818                 }
1819
1820                 /* This is probably NT */
1821                 DEBUG(5, ("We are checking against an NT - %s\n",
1822                           nt_errstr(status)));
1823                 tevent_req_done(req);
1824                 return;
1825         } else if (!NT_STATUS_IS_OK(status)) {
1826                 DEBUG(0, ("dcerpc_netr_LogonGetCapabilities_r_recv failed with %s\n",
1827                           nt_errstr(status)));
1828                 tevent_req_nterror(req, status);
1829                 return;
1830         }
1831
1832         if (NT_STATUS_EQUAL(state->r.out.result, NT_STATUS_NOT_IMPLEMENTED)) {
1833                 if (state->creds->negotiate_flags & NETLOGON_NEG_SUPPORTS_AES) {
1834                         /* This means AES isn't supported. */
1835                         DEBUG(5, ("AES is not supported and the error was %s\n",
1836                                   nt_errstr(state->r.out.result)));
1837                         tevent_req_nterror(req,
1838                                            NT_STATUS_INVALID_NETWORK_RESPONSE);
1839                         return;
1840                 }
1841
1842                 /* This is probably an old Samba version */
1843                 DEBUG(5, ("We are checking against an old Samba version - %s\n",
1844                           nt_errstr(state->r.out.result)));
1845                 tevent_req_done(req);
1846                 return;
1847         }
1848
1849         /* We need to check the credential state here, cause win2k3 and earlier
1850          * returns NT_STATUS_NOT_IMPLEMENTED */
1851         if (!netlogon_creds_client_check(state->creds,
1852                                          &state->r.out.return_authenticator->cred)) {
1853                 /*
1854                  * Server replied with bad credential. Fail.
1855                  */
1856                 DEBUG(0,("rpc_pipe_bind_step_two_done: server %s "
1857                          "replied with bad credential\n",
1858                          state->cli->desthost));
1859                 tevent_req_nterror(req, NT_STATUS_UNSUCCESSFUL);
1860                 return;
1861         }
1862
1863         TALLOC_FREE(schannel_auth->creds);
1864         schannel_auth->creds = talloc_steal(state->cli, state->creds);
1865
1866         if (!NT_STATUS_IS_OK(state->r.out.result)) {
1867                 DEBUG(0, ("dcerpc_netr_LogonGetCapabilities_r_recv failed with %s\n",
1868                           nt_errstr(state->r.out.result)));
1869                 tevent_req_nterror(req, state->r.out.result);
1870                 return;
1871         }
1872
1873         if (state->creds->negotiate_flags !=
1874             state->r.out.capabilities->server_capabilities) {
1875                 DEBUG(0, ("The client capabilities don't match the server "
1876                           "capabilities: local[0x%08X] remote[0x%08X]\n",
1877                           state->creds->negotiate_flags,
1878                           state->capabilities.server_capabilities));
1879                 tevent_req_nterror(req,
1880                                    NT_STATUS_INVALID_NETWORK_RESPONSE);
1881                 return;
1882         }
1883
1884         /* TODO: Add downgrade dectection. */
1885
1886         tevent_req_done(req);
1887         return;
1888 }
1889
1890 static NTSTATUS rpc_bind_next_send(struct tevent_req *req,
1891                                    struct rpc_pipe_bind_state *state,
1892                                    DATA_BLOB *auth_token)
1893 {
1894         struct pipe_auth_data *auth = state->cli->auth;
1895         struct tevent_req *subreq;
1896         NTSTATUS status;
1897
1898         /* Now prepare the alter context pdu. */
1899         data_blob_free(&state->rpc_out);
1900
1901         status = create_rpc_alter_context(state,
1902                                           auth->auth_type,
1903                                           auth->auth_level,
1904                                           state->rpc_call_id,
1905                                           &state->cli->abstract_syntax,
1906                                           &state->cli->transfer_syntax,
1907                                           auth_token,
1908                                           &state->rpc_out);
1909         if (!NT_STATUS_IS_OK(status)) {
1910                 return status;
1911         }
1912
1913         subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1914                                    &state->rpc_out, DCERPC_PKT_ALTER_RESP);
1915         if (subreq == NULL) {
1916                 return NT_STATUS_NO_MEMORY;
1917         }
1918         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1919         return NT_STATUS_OK;
1920 }
1921
1922 static NTSTATUS rpc_bind_finish_send(struct tevent_req *req,
1923                                      struct rpc_pipe_bind_state *state,
1924                                      DATA_BLOB *auth_token)
1925 {
1926         struct pipe_auth_data *auth = state->cli->auth;
1927         struct tevent_req *subreq;
1928         NTSTATUS status;
1929
1930         state->auth3 = true;
1931
1932         /* Now prepare the auth3 context pdu. */
1933         data_blob_free(&state->rpc_out);
1934
1935         status = create_rpc_bind_auth3(state, state->cli,
1936                                         state->rpc_call_id,
1937                                         auth->auth_type,
1938                                         auth->auth_level,
1939                                         auth_token,
1940                                         &state->rpc_out);
1941         if (!NT_STATUS_IS_OK(status)) {
1942                 return status;
1943         }
1944
1945         subreq = rpc_api_pipe_send(state, state->ev, state->cli,
1946                                    &state->rpc_out, DCERPC_PKT_AUTH3);
1947         if (subreq == NULL) {
1948                 return NT_STATUS_NO_MEMORY;
1949         }
1950         tevent_req_set_callback(subreq, rpc_pipe_bind_step_one_done, req);
1951         return NT_STATUS_OK;
1952 }
1953
1954 NTSTATUS rpc_pipe_bind_recv(struct tevent_req *req)
1955 {
1956         return tevent_req_simple_recv_ntstatus(req);
1957 }
1958
1959 NTSTATUS rpc_pipe_bind(struct rpc_pipe_client *cli,
1960                        struct pipe_auth_data *auth)
1961 {
1962         TALLOC_CTX *frame = talloc_stackframe();
1963         struct event_context *ev;
1964         struct tevent_req *req;
1965         NTSTATUS status = NT_STATUS_OK;
1966
1967         ev = event_context_init(frame);
1968         if (ev == NULL) {
1969                 status = NT_STATUS_NO_MEMORY;
1970                 goto fail;
1971         }
1972
1973         req = rpc_pipe_bind_send(frame, ev, cli, auth);
1974         if (req == NULL) {
1975                 status = NT_STATUS_NO_MEMORY;
1976                 goto fail;
1977         }
1978
1979         if (!tevent_req_poll(req, ev)) {
1980                 status = map_nt_error_from_unix(errno);
1981                 goto fail;
1982         }
1983
1984         status = rpc_pipe_bind_recv(req);
1985  fail:
1986         TALLOC_FREE(frame);
1987         return status;
1988 }
1989
1990 #define RPCCLI_DEFAULT_TIMEOUT 10000 /* 10 seconds. */
1991
1992 unsigned int rpccli_set_timeout(struct rpc_pipe_client *rpc_cli,
1993                                 unsigned int timeout)
1994 {
1995         unsigned int old;
1996
1997         if (rpc_cli->transport == NULL) {
1998                 return RPCCLI_DEFAULT_TIMEOUT;
1999         }
2000
2001         if (rpc_cli->transport->set_timeout == NULL) {
2002                 return RPCCLI_DEFAULT_TIMEOUT;
2003         }
2004
2005         old = rpc_cli->transport->set_timeout(rpc_cli->transport->priv, timeout);
2006         if (old == 0) {
2007                 return RPCCLI_DEFAULT_TIMEOUT;
2008         }
2009
2010         return old;
2011 }
2012
2013 bool rpccli_is_connected(struct rpc_pipe_client *rpc_cli)
2014 {
2015         if (rpc_cli == NULL) {
2016                 return false;
2017         }
2018
2019         if (rpc_cli->transport == NULL) {
2020                 return false;
2021         }
2022
2023         return rpc_cli->transport->is_connected(rpc_cli->transport->priv);
2024 }
2025
2026 struct rpccli_bh_state {
2027         struct rpc_pipe_client *rpc_cli;
2028 };
2029
2030 static bool rpccli_bh_is_connected(struct dcerpc_binding_handle *h)
2031 {
2032         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
2033                                      struct rpccli_bh_state);
2034
2035         return rpccli_is_connected(hs->rpc_cli);
2036 }
2037
2038 static uint32_t rpccli_bh_set_timeout(struct dcerpc_binding_handle *h,
2039                                       uint32_t timeout)
2040 {
2041         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
2042                                      struct rpccli_bh_state);
2043
2044         return rpccli_set_timeout(hs->rpc_cli, timeout);
2045 }
2046
2047 struct rpccli_bh_raw_call_state {
2048         DATA_BLOB in_data;
2049         DATA_BLOB out_data;
2050         uint32_t out_flags;
2051 };
2052
2053 static void rpccli_bh_raw_call_done(struct tevent_req *subreq);
2054
2055 static struct tevent_req *rpccli_bh_raw_call_send(TALLOC_CTX *mem_ctx,
2056                                                   struct tevent_context *ev,
2057                                                   struct dcerpc_binding_handle *h,
2058                                                   const struct GUID *object,
2059                                                   uint32_t opnum,
2060                                                   uint32_t in_flags,
2061                                                   const uint8_t *in_data,
2062                                                   size_t in_length)
2063 {
2064         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
2065                                      struct rpccli_bh_state);
2066         struct tevent_req *req;
2067         struct rpccli_bh_raw_call_state *state;
2068         bool ok;
2069         struct tevent_req *subreq;
2070
2071         req = tevent_req_create(mem_ctx, &state,
2072                                 struct rpccli_bh_raw_call_state);
2073         if (req == NULL) {
2074                 return NULL;
2075         }
2076         state->in_data.data = discard_const_p(uint8_t, in_data);
2077         state->in_data.length = in_length;
2078
2079         ok = rpccli_bh_is_connected(h);
2080         if (!ok) {
2081                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
2082                 return tevent_req_post(req, ev);
2083         }
2084
2085         subreq = rpc_api_pipe_req_send(state, ev, hs->rpc_cli,
2086                                        opnum, &state->in_data);
2087         if (tevent_req_nomem(subreq, req)) {
2088                 return tevent_req_post(req, ev);
2089         }
2090         tevent_req_set_callback(subreq, rpccli_bh_raw_call_done, req);
2091
2092         return req;
2093 }
2094
2095 static void rpccli_bh_raw_call_done(struct tevent_req *subreq)
2096 {
2097         struct tevent_req *req =
2098                 tevent_req_callback_data(subreq,
2099                 struct tevent_req);
2100         struct rpccli_bh_raw_call_state *state =
2101                 tevent_req_data(req,
2102                 struct rpccli_bh_raw_call_state);
2103         NTSTATUS status;
2104
2105         state->out_flags = 0;
2106
2107         /* TODO: support bigendian responses */
2108
2109         status = rpc_api_pipe_req_recv(subreq, state, &state->out_data);
2110         TALLOC_FREE(subreq);
2111         if (!NT_STATUS_IS_OK(status)) {
2112                 tevent_req_nterror(req, status);
2113                 return;
2114         }
2115
2116         tevent_req_done(req);
2117 }
2118
2119 static NTSTATUS rpccli_bh_raw_call_recv(struct tevent_req *req,
2120                                         TALLOC_CTX *mem_ctx,
2121                                         uint8_t **out_data,
2122                                         size_t *out_length,
2123                                         uint32_t *out_flags)
2124 {
2125         struct rpccli_bh_raw_call_state *state =
2126                 tevent_req_data(req,
2127                 struct rpccli_bh_raw_call_state);
2128         NTSTATUS status;
2129
2130         if (tevent_req_is_nterror(req, &status)) {
2131                 tevent_req_received(req);
2132                 return status;
2133         }
2134
2135         *out_data = talloc_move(mem_ctx, &state->out_data.data);
2136         *out_length = state->out_data.length;
2137         *out_flags = state->out_flags;
2138         tevent_req_received(req);
2139         return NT_STATUS_OK;
2140 }
2141
2142 struct rpccli_bh_disconnect_state {
2143         uint8_t _dummy;
2144 };
2145
2146 static struct tevent_req *rpccli_bh_disconnect_send(TALLOC_CTX *mem_ctx,
2147                                                 struct tevent_context *ev,
2148                                                 struct dcerpc_binding_handle *h)
2149 {
2150         struct rpccli_bh_state *hs = dcerpc_binding_handle_data(h,
2151                                      struct rpccli_bh_state);
2152         struct tevent_req *req;
2153         struct rpccli_bh_disconnect_state *state;
2154         bool ok;
2155
2156         req = tevent_req_create(mem_ctx, &state,
2157                                 struct rpccli_bh_disconnect_state);
2158         if (req == NULL) {
2159                 return NULL;
2160         }
2161
2162         ok = rpccli_bh_is_connected(h);
2163         if (!ok) {
2164                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
2165                 return tevent_req_post(req, ev);
2166         }
2167
2168         /*
2169          * TODO: do a real async disconnect ...
2170          *
2171          * For now the caller needs to free rpc_cli
2172          */
2173         hs->rpc_cli = NULL;
2174
2175         tevent_req_done(req);
2176         return tevent_req_post(req, ev);
2177 }
2178
2179 static NTSTATUS rpccli_bh_disconnect_recv(struct tevent_req *req)
2180 {
2181         NTSTATUS status;
2182
2183         if (tevent_req_is_nterror(req, &status)) {
2184                 tevent_req_received(req);
2185                 return status;
2186         }
2187
2188         tevent_req_received(req);
2189         return NT_STATUS_OK;
2190 }
2191
2192 static bool rpccli_bh_ref_alloc(struct dcerpc_binding_handle *h)
2193 {
2194         return true;
2195 }
2196
2197 static void rpccli_bh_do_ndr_print(struct dcerpc_binding_handle *h,
2198                                    int ndr_flags,
2199                                    const void *_struct_ptr,
2200                                    const struct ndr_interface_call *call)
2201 {
2202         void *struct_ptr = discard_const(_struct_ptr);
2203
2204         if (DEBUGLEVEL < 10) {
2205                 return;
2206         }
2207
2208         if (ndr_flags & NDR_IN) {
2209                 ndr_print_function_debug(call->ndr_print,
2210                                          call->name,
2211                                          ndr_flags,
2212                                          struct_ptr);
2213         }
2214         if (ndr_flags & NDR_OUT) {
2215                 ndr_print_function_debug(call->ndr_print,
2216                                          call->name,
2217                                          ndr_flags,
2218                                          struct_ptr);
2219         }
2220 }
2221
2222 static const struct dcerpc_binding_handle_ops rpccli_bh_ops = {
2223         .name                   = "rpccli",
2224         .is_connected           = rpccli_bh_is_connected,
2225         .set_timeout            = rpccli_bh_set_timeout,
2226         .raw_call_send          = rpccli_bh_raw_call_send,
2227         .raw_call_recv          = rpccli_bh_raw_call_recv,
2228         .disconnect_send        = rpccli_bh_disconnect_send,
2229         .disconnect_recv        = rpccli_bh_disconnect_recv,
2230
2231         .ref_alloc              = rpccli_bh_ref_alloc,
2232         .do_ndr_print           = rpccli_bh_do_ndr_print,
2233 };
2234
2235 /* initialise a rpc_pipe_client binding handle */
2236 struct dcerpc_binding_handle *rpccli_bh_create(struct rpc_pipe_client *c)
2237 {
2238         struct dcerpc_binding_handle *h;
2239         struct rpccli_bh_state *hs;
2240
2241         h = dcerpc_binding_handle_create(c,
2242                                          &rpccli_bh_ops,
2243                                          NULL,
2244                                          NULL, /* TODO */
2245                                          &hs,
2246                                          struct rpccli_bh_state,
2247                                          __location__);
2248         if (h == NULL) {
2249                 return NULL;
2250         }
2251         hs->rpc_cli = c;
2252
2253         return h;
2254 }
2255
2256 NTSTATUS rpccli_ncalrpc_bind_data(TALLOC_CTX *mem_ctx,
2257                                   struct pipe_auth_data **presult)
2258 {
2259         struct pipe_auth_data *result;
2260
2261         result = talloc(mem_ctx, struct pipe_auth_data);
2262         if (result == NULL) {
2263                 return NT_STATUS_NO_MEMORY;
2264         }
2265
2266         result->auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM;
2267         result->auth_level = DCERPC_AUTH_LEVEL_CONNECT;
2268
2269         result->user_name = talloc_strdup(result, "");
2270         result->domain = talloc_strdup(result, "");
2271         if ((result->user_name == NULL) || (result->domain == NULL)) {
2272                 TALLOC_FREE(result);
2273                 return NT_STATUS_NO_MEMORY;
2274         }
2275
2276         *presult = result;
2277         return NT_STATUS_OK;
2278 }
2279
2280 NTSTATUS rpccli_anon_bind_data(TALLOC_CTX *mem_ctx,
2281                                struct pipe_auth_data **presult)
2282 {
2283         struct pipe_auth_data *result;
2284
2285         result = talloc(mem_ctx, struct pipe_auth_data);
2286         if (result == NULL) {
2287                 return NT_STATUS_NO_MEMORY;
2288         }
2289
2290         result->auth_type = DCERPC_AUTH_TYPE_NONE;
2291         result->auth_level = DCERPC_AUTH_LEVEL_NONE;
2292
2293         result->user_name = talloc_strdup(result, "");
2294         result->domain = talloc_strdup(result, "");
2295         if ((result->user_name == NULL) || (result->domain == NULL)) {
2296                 TALLOC_FREE(result);
2297                 return NT_STATUS_NO_MEMORY;
2298         }
2299
2300         *presult = result;
2301         return NT_STATUS_OK;
2302 }
2303
2304 static NTSTATUS rpccli_generic_bind_data(TALLOC_CTX *mem_ctx,
2305                                          enum dcerpc_AuthType auth_type,
2306                                          enum dcerpc_AuthLevel auth_level,
2307                                          const char *server,
2308                                          const char *target_service,
2309                                          const char *domain,
2310                                          const char *username,
2311                                          const char *password,
2312                                          enum credentials_use_kerberos use_kerberos,
2313                                          struct pipe_auth_data **presult)
2314 {
2315         struct auth_generic_state *auth_generic_ctx;
2316         struct pipe_auth_data *result;
2317         NTSTATUS status;
2318
2319         result = talloc(mem_ctx, struct pipe_auth_data);
2320         if (result == NULL) {
2321                 return NT_STATUS_NO_MEMORY;
2322         }
2323
2324         result->auth_type = auth_type;
2325         result->auth_level = auth_level;
2326
2327         result->user_name = talloc_strdup(result, username);
2328         result->domain = talloc_strdup(result, domain);
2329         if ((result->user_name == NULL) || (result->domain == NULL)) {
2330                 status = NT_STATUS_NO_MEMORY;
2331                 goto fail;
2332         }
2333
2334         status = auth_generic_client_prepare(result,
2335                                              &auth_generic_ctx);
2336         if (!NT_STATUS_IS_OK(status)) {
2337                 goto fail;
2338         }
2339
2340         status = auth_generic_set_username(auth_generic_ctx, username);
2341         if (!NT_STATUS_IS_OK(status)) {
2342                 goto fail;
2343         }
2344
2345         status = auth_generic_set_domain(auth_generic_ctx, domain);
2346         if (!NT_STATUS_IS_OK(status)) {
2347                 goto fail;
2348         }
2349
2350         status = auth_generic_set_password(auth_generic_ctx, password);
2351         if (!NT_STATUS_IS_OK(status)) {
2352                 goto fail;
2353         }
2354
2355         status = gensec_set_target_service(auth_generic_ctx->gensec_security, target_service);
2356         if (!NT_STATUS_IS_OK(status)) {
2357                 goto fail;
2358         }
2359
2360         status = gensec_set_target_hostname(auth_generic_ctx->gensec_security, server);
2361         if (!NT_STATUS_IS_OK(status)) {
2362                 goto fail;
2363         }
2364
2365         cli_credentials_set_kerberos_state(auth_generic_ctx->credentials, use_kerberos);
2366
2367         status = auth_generic_client_start_by_authtype(auth_generic_ctx, auth_type, auth_level);
2368         if (!NT_STATUS_IS_OK(status)) {
2369                 goto fail;
2370         }
2371
2372         result->auth_ctx = talloc_move(result, &auth_generic_ctx->gensec_security);
2373         talloc_free(auth_generic_ctx);
2374         *presult = result;
2375         return NT_STATUS_OK;
2376
2377  fail:
2378         TALLOC_FREE(result);
2379         return status;
2380 }
2381
2382 NTSTATUS rpccli_schannel_bind_data(TALLOC_CTX *mem_ctx, const char *domain,
2383                                    enum dcerpc_AuthLevel auth_level,
2384                                    struct netlogon_creds_CredentialState *creds,
2385                                    struct pipe_auth_data **presult)
2386 {
2387         struct schannel_state *schannel_auth;
2388         struct pipe_auth_data *result;
2389
2390         result = talloc(mem_ctx, struct pipe_auth_data);
2391         if (result == NULL) {
2392                 return NT_STATUS_NO_MEMORY;
2393         }
2394
2395         result->auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
2396         result->auth_level = auth_level;
2397
2398         result->user_name = talloc_strdup(result, "");
2399         result->domain = talloc_strdup(result, domain);
2400         if ((result->user_name == NULL) || (result->domain == NULL)) {
2401                 goto fail;
2402         }
2403
2404         schannel_auth = talloc_zero(result, struct schannel_state);
2405         if (schannel_auth == NULL) {
2406                 goto fail;
2407         }
2408
2409         schannel_auth->state = SCHANNEL_STATE_START;
2410         schannel_auth->initiator = true;
2411         schannel_auth->creds = netlogon_creds_copy(result, creds);
2412
2413         result->auth_ctx = schannel_auth;
2414         *presult = result;
2415         return NT_STATUS_OK;
2416
2417  fail:
2418         TALLOC_FREE(result);
2419         return NT_STATUS_NO_MEMORY;
2420 }
2421
2422 /**
2423  * Create an rpc pipe client struct, connecting to a tcp port.
2424  */
2425 static NTSTATUS rpc_pipe_open_tcp_port(TALLOC_CTX *mem_ctx, const char *host,
2426                                        uint16_t port,
2427                                        const struct ndr_syntax_id *abstract_syntax,
2428                                        struct rpc_pipe_client **presult)
2429 {
2430         struct rpc_pipe_client *result;
2431         struct sockaddr_storage addr;
2432         NTSTATUS status;
2433         int fd;
2434
2435         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
2436         if (result == NULL) {
2437                 return NT_STATUS_NO_MEMORY;
2438         }
2439
2440         result->abstract_syntax = *abstract_syntax;
2441         result->transfer_syntax = ndr_transfer_syntax_ndr;
2442
2443         result->desthost = talloc_strdup(result, host);
2444         result->srv_name_slash = talloc_asprintf_strupper_m(
2445                 result, "\\\\%s", result->desthost);
2446         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2447                 status = NT_STATUS_NO_MEMORY;
2448                 goto fail;
2449         }
2450
2451         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2452         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2453
2454         if (!resolve_name(host, &addr, 0, false)) {
2455                 status = NT_STATUS_NOT_FOUND;
2456                 goto fail;
2457         }
2458
2459         status = open_socket_out(&addr, port, 60*1000, &fd);
2460         if (!NT_STATUS_IS_OK(status)) {
2461                 goto fail;
2462         }
2463         set_socket_options(fd, lp_socket_options());
2464
2465         status = rpc_transport_sock_init(result, fd, &result->transport);
2466         if (!NT_STATUS_IS_OK(status)) {
2467                 close(fd);
2468                 goto fail;
2469         }
2470
2471         result->transport->transport = NCACN_IP_TCP;
2472
2473         result->binding_handle = rpccli_bh_create(result);
2474         if (result->binding_handle == NULL) {
2475                 TALLOC_FREE(result);
2476                 return NT_STATUS_NO_MEMORY;
2477         }
2478
2479         *presult = result;
2480         return NT_STATUS_OK;
2481
2482  fail:
2483         TALLOC_FREE(result);
2484         return status;
2485 }
2486
2487 /**
2488  * Determine the tcp port on which a dcerpc interface is listening
2489  * for the ncacn_ip_tcp transport via the endpoint mapper of the
2490  * target host.
2491  */
2492 static NTSTATUS rpc_pipe_get_tcp_port(const char *host,
2493                                       const struct ndr_syntax_id *abstract_syntax,
2494                                       uint16_t *pport)
2495 {
2496         NTSTATUS status;
2497         struct rpc_pipe_client *epm_pipe = NULL;
2498         struct dcerpc_binding_handle *epm_handle = NULL;
2499         struct pipe_auth_data *auth = NULL;
2500         struct dcerpc_binding *map_binding = NULL;
2501         struct dcerpc_binding *res_binding = NULL;
2502         struct epm_twr_t *map_tower = NULL;
2503         struct epm_twr_t *res_towers = NULL;
2504         struct policy_handle *entry_handle = NULL;
2505         uint32_t num_towers = 0;
2506         uint32_t max_towers = 1;
2507         struct epm_twr_p_t towers;
2508         TALLOC_CTX *tmp_ctx = talloc_stackframe();
2509         uint32_t result = 0;
2510
2511         if (pport == NULL) {
2512                 status = NT_STATUS_INVALID_PARAMETER;
2513                 goto done;
2514         }
2515
2516         if (ndr_syntax_id_equal(abstract_syntax,
2517                                 &ndr_table_epmapper.syntax_id)) {
2518                 *pport = 135;
2519                 return NT_STATUS_OK;
2520         }
2521
2522         /* open the connection to the endpoint mapper */
2523         status = rpc_pipe_open_tcp_port(tmp_ctx, host, 135,
2524                                         &ndr_table_epmapper.syntax_id,
2525                                         &epm_pipe);
2526
2527         if (!NT_STATUS_IS_OK(status)) {
2528                 goto done;
2529         }
2530         epm_handle = epm_pipe->binding_handle;
2531
2532         status = rpccli_anon_bind_data(tmp_ctx, &auth);
2533         if (!NT_STATUS_IS_OK(status)) {
2534                 goto done;
2535         }
2536
2537         status = rpc_pipe_bind(epm_pipe, auth);
2538         if (!NT_STATUS_IS_OK(status)) {
2539                 goto done;
2540         }
2541
2542         /* create tower for asking the epmapper */
2543
2544         map_binding = talloc_zero(tmp_ctx, struct dcerpc_binding);
2545         if (map_binding == NULL) {
2546                 status = NT_STATUS_NO_MEMORY;
2547                 goto done;
2548         }
2549
2550         map_binding->transport = NCACN_IP_TCP;
2551         map_binding->object = *abstract_syntax;
2552         map_binding->host = host; /* needed? */
2553         map_binding->endpoint = "0"; /* correct? needed? */
2554
2555         map_tower = talloc_zero(tmp_ctx, struct epm_twr_t);
2556         if (map_tower == NULL) {
2557                 status = NT_STATUS_NO_MEMORY;
2558                 goto done;
2559         }
2560
2561         status = dcerpc_binding_build_tower(tmp_ctx, map_binding,
2562                                             &(map_tower->tower));
2563         if (!NT_STATUS_IS_OK(status)) {
2564                 goto done;
2565         }
2566
2567         /* allocate further parameters for the epm_Map call */
2568
2569         res_towers = talloc_array(tmp_ctx, struct epm_twr_t, max_towers);
2570         if (res_towers == NULL) {
2571                 status = NT_STATUS_NO_MEMORY;
2572                 goto done;
2573         }
2574         towers.twr = res_towers;
2575
2576         entry_handle = talloc_zero(tmp_ctx, struct policy_handle);
2577         if (entry_handle == NULL) {
2578                 status = NT_STATUS_NO_MEMORY;
2579                 goto done;
2580         }
2581
2582         /* ask the endpoint mapper for the port */
2583
2584         status = dcerpc_epm_Map(epm_handle,
2585                                 tmp_ctx,
2586                                 discard_const_p(struct GUID,
2587                                               &(abstract_syntax->uuid)),
2588                                 map_tower,
2589                                 entry_handle,
2590                                 max_towers,
2591                                 &num_towers,
2592                                 &towers,
2593                                 &result);
2594
2595         if (!NT_STATUS_IS_OK(status)) {
2596                 goto done;
2597         }
2598
2599         if (result != EPMAPPER_STATUS_OK) {
2600                 status = NT_STATUS_UNSUCCESSFUL;
2601                 goto done;
2602         }
2603
2604         if (num_towers != 1) {
2605                 status = NT_STATUS_UNSUCCESSFUL;
2606                 goto done;
2607         }
2608
2609         /* extract the port from the answer */
2610
2611         status = dcerpc_binding_from_tower(tmp_ctx,
2612                                            &(towers.twr->tower),
2613                                            &res_binding);
2614         if (!NT_STATUS_IS_OK(status)) {
2615                 goto done;
2616         }
2617
2618         /* are further checks here necessary? */
2619         if (res_binding->transport != NCACN_IP_TCP) {
2620                 status = NT_STATUS_UNSUCCESSFUL;
2621                 goto done;
2622         }
2623
2624         *pport = (uint16_t)atoi(res_binding->endpoint);
2625
2626 done:
2627         TALLOC_FREE(tmp_ctx);
2628         return status;
2629 }
2630
2631 /**
2632  * Create a rpc pipe client struct, connecting to a host via tcp.
2633  * The port is determined by asking the endpoint mapper on the given
2634  * host.
2635  */
2636 NTSTATUS rpc_pipe_open_tcp(TALLOC_CTX *mem_ctx, const char *host,
2637                            const struct ndr_syntax_id *abstract_syntax,
2638                            struct rpc_pipe_client **presult)
2639 {
2640         NTSTATUS status;
2641         uint16_t port = 0;
2642
2643         status = rpc_pipe_get_tcp_port(host, abstract_syntax, &port);
2644         if (!NT_STATUS_IS_OK(status)) {
2645                 return status;
2646         }
2647
2648         return rpc_pipe_open_tcp_port(mem_ctx, host, port,
2649                                         abstract_syntax, presult);
2650 }
2651
2652 /********************************************************************
2653  Create a rpc pipe client struct, connecting to a unix domain socket
2654  ********************************************************************/
2655 NTSTATUS rpc_pipe_open_ncalrpc(TALLOC_CTX *mem_ctx, const char *socket_path,
2656                                const struct ndr_syntax_id *abstract_syntax,
2657                                struct rpc_pipe_client **presult)
2658 {
2659         struct rpc_pipe_client *result;
2660         struct sockaddr_un addr;
2661         NTSTATUS status;
2662         int fd;
2663         socklen_t salen;
2664
2665         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
2666         if (result == NULL) {
2667                 return NT_STATUS_NO_MEMORY;
2668         }
2669
2670         result->abstract_syntax = *abstract_syntax;
2671         result->transfer_syntax = ndr_transfer_syntax_ndr;
2672
2673         result->desthost = get_myname(result);
2674         result->srv_name_slash = talloc_asprintf_strupper_m(
2675                 result, "\\\\%s", result->desthost);
2676         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2677                 status = NT_STATUS_NO_MEMORY;
2678                 goto fail;
2679         }
2680
2681         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2682         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2683
2684         fd = socket(AF_UNIX, SOCK_STREAM, 0);
2685         if (fd == -1) {
2686                 status = map_nt_error_from_unix(errno);
2687                 goto fail;
2688         }
2689
2690         ZERO_STRUCT(addr);
2691         addr.sun_family = AF_UNIX;
2692         strlcpy(addr.sun_path, socket_path, sizeof(addr.sun_path));
2693         salen = sizeof(struct sockaddr_un);
2694
2695         if (connect(fd, (struct sockaddr *)(void *)&addr, salen) == -1) {
2696                 DEBUG(0, ("connect(%s) failed: %s\n", socket_path,
2697                           strerror(errno)));
2698                 close(fd);
2699                 return map_nt_error_from_unix(errno);
2700         }
2701
2702         status = rpc_transport_sock_init(result, fd, &result->transport);
2703         if (!NT_STATUS_IS_OK(status)) {
2704                 close(fd);
2705                 goto fail;
2706         }
2707
2708         result->transport->transport = NCALRPC;
2709
2710         result->binding_handle = rpccli_bh_create(result);
2711         if (result->binding_handle == NULL) {
2712                 TALLOC_FREE(result);
2713                 return NT_STATUS_NO_MEMORY;
2714         }
2715
2716         *presult = result;
2717         return NT_STATUS_OK;
2718
2719  fail:
2720         TALLOC_FREE(result);
2721         return status;
2722 }
2723
2724 struct rpc_pipe_client_np_ref {
2725         struct cli_state *cli;
2726         struct rpc_pipe_client *pipe;
2727 };
2728
2729 static int rpc_pipe_client_np_ref_destructor(struct rpc_pipe_client_np_ref *np_ref)
2730 {
2731         DLIST_REMOVE(np_ref->cli->pipe_list, np_ref->pipe);
2732         return 0;
2733 }
2734
2735 /****************************************************************************
2736  Open a named pipe over SMB to a remote server.
2737  *
2738  * CAVEAT CALLER OF THIS FUNCTION:
2739  *    The returned rpc_pipe_client saves a copy of the cli_state cli pointer,
2740  *    so be sure that this function is called AFTER any structure (vs pointer)
2741  *    assignment of the cli.  In particular, libsmbclient does structure
2742  *    assignments of cli, which invalidates the data in the returned
2743  *    rpc_pipe_client if this function is called before the structure assignment
2744  *    of cli.
2745  *
2746  ****************************************************************************/
2747
2748 static NTSTATUS rpc_pipe_open_np(struct cli_state *cli,
2749                                  const struct ndr_syntax_id *abstract_syntax,
2750                                  struct rpc_pipe_client **presult)
2751 {
2752         struct rpc_pipe_client *result;
2753         NTSTATUS status;
2754         struct rpc_pipe_client_np_ref *np_ref;
2755
2756         /* sanity check to protect against crashes */
2757
2758         if ( !cli ) {
2759                 return NT_STATUS_INVALID_HANDLE;
2760         }
2761
2762         result = talloc_zero(NULL, struct rpc_pipe_client);
2763         if (result == NULL) {
2764                 return NT_STATUS_NO_MEMORY;
2765         }
2766
2767         result->abstract_syntax = *abstract_syntax;
2768         result->transfer_syntax = ndr_transfer_syntax_ndr;
2769         result->desthost = talloc_strdup(result, smbXcli_conn_remote_name(cli->conn));
2770         result->srv_name_slash = talloc_asprintf_strupper_m(
2771                 result, "\\\\%s", result->desthost);
2772
2773         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
2774         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
2775
2776         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
2777                 TALLOC_FREE(result);
2778                 return NT_STATUS_NO_MEMORY;
2779         }
2780
2781         status = rpc_transport_np_init(result, cli, abstract_syntax,
2782                                        &result->transport);
2783         if (!NT_STATUS_IS_OK(status)) {
2784                 TALLOC_FREE(result);
2785                 return status;
2786         }
2787
2788         result->transport->transport = NCACN_NP;
2789
2790         np_ref = talloc(result->transport, struct rpc_pipe_client_np_ref);
2791         if (np_ref == NULL) {
2792                 TALLOC_FREE(result);
2793                 return NT_STATUS_NO_MEMORY;
2794         }
2795         np_ref->cli = cli;
2796         np_ref->pipe = result;
2797
2798         DLIST_ADD(np_ref->cli->pipe_list, np_ref->pipe);
2799         talloc_set_destructor(np_ref, rpc_pipe_client_np_ref_destructor);
2800
2801         result->binding_handle = rpccli_bh_create(result);
2802         if (result->binding_handle == NULL) {
2803                 TALLOC_FREE(result);
2804                 return NT_STATUS_NO_MEMORY;
2805         }
2806
2807         *presult = result;
2808         return NT_STATUS_OK;
2809 }
2810
2811 /****************************************************************************
2812  Open a pipe to a remote server.
2813  ****************************************************************************/
2814
2815 static NTSTATUS cli_rpc_pipe_open(struct cli_state *cli,
2816                                   enum dcerpc_transport_t transport,
2817                                   const struct ndr_syntax_id *interface,
2818                                   struct rpc_pipe_client **presult)
2819 {
2820         switch (transport) {
2821         case NCACN_IP_TCP:
2822                 return rpc_pipe_open_tcp(NULL, smbXcli_conn_remote_name(cli->conn),
2823                                          interface, presult);
2824         case NCACN_NP:
2825                 return rpc_pipe_open_np(cli, interface, presult);
2826         default:
2827                 return NT_STATUS_NOT_IMPLEMENTED;
2828         }
2829 }
2830
2831 /****************************************************************************
2832  Open a named pipe to an SMB server and bind anonymously.
2833  ****************************************************************************/
2834
2835 NTSTATUS cli_rpc_pipe_open_noauth_transport(struct cli_state *cli,
2836                                             enum dcerpc_transport_t transport,
2837                                             const struct ndr_syntax_id *interface,
2838                                             struct rpc_pipe_client **presult)
2839 {
2840         struct rpc_pipe_client *result;
2841         struct pipe_auth_data *auth;
2842         NTSTATUS status;
2843
2844         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2845         if (!NT_STATUS_IS_OK(status)) {
2846                 return status;
2847         }
2848
2849         status = rpccli_anon_bind_data(result, &auth);
2850         if (!NT_STATUS_IS_OK(status)) {
2851                 DEBUG(0, ("rpccli_anon_bind_data returned %s\n",
2852                           nt_errstr(status)));
2853                 TALLOC_FREE(result);
2854                 return status;
2855         }
2856
2857         /*
2858          * This is a bit of an abstraction violation due to the fact that an
2859          * anonymous bind on an authenticated SMB inherits the user/domain
2860          * from the enclosing SMB creds
2861          */
2862
2863         TALLOC_FREE(auth->user_name);
2864         TALLOC_FREE(auth->domain);
2865
2866         auth->user_name = talloc_strdup(auth, cli->user_name);
2867         auth->domain = talloc_strdup(auth, cli->domain);
2868         auth->user_session_key = data_blob_talloc(auth,
2869                 cli->user_session_key.data,
2870                 cli->user_session_key.length);
2871
2872         if ((auth->user_name == NULL) || (auth->domain == NULL)) {
2873                 TALLOC_FREE(result);
2874                 return NT_STATUS_NO_MEMORY;
2875         }
2876
2877         status = rpc_pipe_bind(result, auth);
2878         if (!NT_STATUS_IS_OK(status)) {
2879                 int lvl = 0;
2880                 if (ndr_syntax_id_equal(interface,
2881                                         &ndr_table_dssetup.syntax_id)) {
2882                         /* non AD domains just don't have this pipe, avoid
2883                          * level 0 statement in that case - gd */
2884                         lvl = 3;
2885                 }
2886                 DEBUG(lvl, ("cli_rpc_pipe_open_noauth: rpc_pipe_bind for pipe "
2887                             "%s failed with error %s\n",
2888                             get_pipe_name_from_syntax(talloc_tos(), interface),
2889                             nt_errstr(status) ));
2890                 TALLOC_FREE(result);
2891                 return status;
2892         }
2893
2894         DEBUG(10,("cli_rpc_pipe_open_noauth: opened pipe %s to machine "
2895                   "%s and bound anonymously.\n",
2896                   get_pipe_name_from_syntax(talloc_tos(), interface),
2897                   result->desthost));
2898
2899         *presult = result;
2900         return NT_STATUS_OK;
2901 }
2902
2903 /****************************************************************************
2904  ****************************************************************************/
2905
2906 NTSTATUS cli_rpc_pipe_open_noauth(struct cli_state *cli,
2907                                   const struct ndr_syntax_id *interface,
2908                                   struct rpc_pipe_client **presult)
2909 {
2910         return cli_rpc_pipe_open_noauth_transport(cli, NCACN_NP,
2911                                                   interface, presult);
2912 }
2913
2914 /****************************************************************************
2915  Open a named pipe to an SMB server and bind using the mech specified
2916  ****************************************************************************/
2917
2918 NTSTATUS cli_rpc_pipe_open_generic_auth(struct cli_state *cli,
2919                                         const struct ndr_interface_table *table,
2920                                         enum dcerpc_transport_t transport,
2921                                         enum dcerpc_AuthType auth_type,
2922                                         enum dcerpc_AuthLevel auth_level,
2923                                         const char *server,
2924                                         const char *domain,
2925                                         const char *username,
2926                                         const char *password,
2927                                         struct rpc_pipe_client **presult)
2928 {
2929         struct rpc_pipe_client *result;
2930         struct pipe_auth_data *auth = NULL;
2931         const char *target_service = table->authservices->names[0];
2932
2933         NTSTATUS status;
2934
2935         status = cli_rpc_pipe_open(cli, transport, &table->syntax_id, &result);
2936         if (!NT_STATUS_IS_OK(status)) {
2937                 return status;
2938         }
2939
2940         status = rpccli_generic_bind_data(result,
2941                                           auth_type, auth_level,
2942                                           server, target_service,
2943                                           domain, username, password,
2944                                           CRED_AUTO_USE_KERBEROS,
2945                                           &auth);
2946         if (!NT_STATUS_IS_OK(status)) {
2947                 DEBUG(0, ("rpccli_generic_bind_data returned %s\n",
2948                           nt_errstr(status)));
2949                 goto err;
2950         }
2951
2952         status = rpc_pipe_bind(result, auth);
2953         if (!NT_STATUS_IS_OK(status)) {
2954                 DEBUG(0, ("cli_rpc_pipe_open_generic_auth: cli_rpc_pipe_bind failed with error %s\n",
2955                         nt_errstr(status) ));
2956                 goto err;
2957         }
2958
2959         DEBUG(10,("cli_rpc_pipe_open_generic_auth: opened pipe %s to "
2960                 "machine %s and bound as user %s\\%s.\n", table->name,
2961                   result->desthost, domain, username));
2962
2963         *presult = result;
2964         return NT_STATUS_OK;
2965
2966   err:
2967
2968         TALLOC_FREE(result);
2969         return status;
2970 }
2971
2972 /****************************************************************************
2973  External interface.
2974  Open a named pipe to an SMB server and bind using schannel (bind type 68)
2975  using session_key. sign and seal.
2976
2977  The *pdc will be stolen onto this new pipe
2978  ****************************************************************************/
2979
2980 NTSTATUS cli_rpc_pipe_open_schannel_with_key(struct cli_state *cli,
2981                                              const struct ndr_syntax_id *interface,
2982                                              enum dcerpc_transport_t transport,
2983                                              enum dcerpc_AuthLevel auth_level,
2984                                              const char *domain,
2985                                              struct netlogon_creds_CredentialState **pdc,
2986                                              struct rpc_pipe_client **presult)
2987 {
2988         struct rpc_pipe_client *result;
2989         struct pipe_auth_data *auth;
2990         NTSTATUS status;
2991
2992         status = cli_rpc_pipe_open(cli, transport, interface, &result);
2993         if (!NT_STATUS_IS_OK(status)) {
2994                 return status;
2995         }
2996
2997         status = rpccli_schannel_bind_data(result, domain, auth_level,
2998                                            *pdc, &auth);
2999         if (!NT_STATUS_IS_OK(status)) {
3000                 DEBUG(0, ("rpccli_schannel_bind_data returned %s\n",
3001                           nt_errstr(status)));
3002                 TALLOC_FREE(result);
3003                 return status;
3004         }
3005
3006         status = rpc_pipe_bind(result, auth);
3007         if (!NT_STATUS_IS_OK(status)) {
3008                 DEBUG(0, ("cli_rpc_pipe_open_schannel_with_key: "
3009                           "cli_rpc_pipe_bind failed with error %s\n",
3010                           nt_errstr(status) ));
3011                 TALLOC_FREE(result);
3012                 return status;
3013         }
3014
3015         /*
3016          * The credentials on a new netlogon pipe are the ones we are passed
3017          * in - copy them over
3018          */
3019         result->dc = netlogon_creds_copy(result, *pdc);
3020         if (result->dc == NULL) {
3021                 TALLOC_FREE(result);
3022                 return NT_STATUS_NO_MEMORY;
3023         }
3024
3025         DEBUG(10,("cli_rpc_pipe_open_schannel_with_key: opened pipe %s to machine %s "
3026                   "for domain %s and bound using schannel.\n",
3027                   get_pipe_name_from_syntax(talloc_tos(), interface),
3028                   result->desthost, domain));
3029
3030         *presult = result;
3031         return NT_STATUS_OK;
3032 }
3033
3034 NTSTATUS cli_rpc_pipe_open_spnego(struct cli_state *cli,
3035                                   const struct ndr_interface_table *table,
3036                                   enum dcerpc_transport_t transport,
3037                                   const char *oid,
3038                                   enum dcerpc_AuthLevel auth_level,
3039                                   const char *server,
3040                                   const char *domain,
3041                                   const char *username,
3042                                   const char *password,
3043                                   struct rpc_pipe_client **presult)
3044 {
3045         struct rpc_pipe_client *result;
3046         struct pipe_auth_data *auth = NULL;
3047         const char *target_service = table->authservices->names[0];
3048
3049         NTSTATUS status;
3050         enum credentials_use_kerberos use_kerberos;
3051
3052         if (strcmp(oid, GENSEC_OID_KERBEROS5) == 0) {
3053                 use_kerberos = CRED_MUST_USE_KERBEROS;
3054         } else if (strcmp(oid, GENSEC_OID_NTLMSSP) == 0) {
3055                 use_kerberos = CRED_DONT_USE_KERBEROS;
3056         } else {
3057                 return NT_STATUS_INVALID_PARAMETER;
3058         }
3059
3060         status = cli_rpc_pipe_open(cli, transport, &table->syntax_id, &result);
3061         if (!NT_STATUS_IS_OK(status)) {
3062                 return status;
3063         }
3064
3065         status = rpccli_generic_bind_data(result,
3066                                           DCERPC_AUTH_TYPE_SPNEGO, auth_level,
3067                                           server, target_service,
3068                                           domain, username, password,
3069                                           use_kerberos,
3070                                           &auth);
3071         if (!NT_STATUS_IS_OK(status)) {
3072                 DEBUG(0, ("rpccli_generic_bind_data returned %s\n",
3073                           nt_errstr(status)));
3074                 goto err;
3075         }
3076
3077         status = rpc_pipe_bind(result, auth);
3078         if (!NT_STATUS_IS_OK(status)) {
3079                 DEBUG(0, ("cli_rpc_pipe_open_spnego: cli_rpc_pipe_bind failed with error %s\n",
3080                         nt_errstr(status) ));
3081                 goto err;
3082         }
3083
3084         DEBUG(10,("cli_rpc_pipe_open_spnego: opened pipe %s to "
3085                   "machine %s.\n", table->name,
3086                   result->desthost));
3087
3088         *presult = result;
3089         return NT_STATUS_OK;
3090
3091   err:
3092
3093         TALLOC_FREE(result);
3094         return status;
3095 }
3096
3097 NTSTATUS cli_get_session_key(TALLOC_CTX *mem_ctx,
3098                              struct rpc_pipe_client *cli,
3099                              DATA_BLOB *session_key)
3100 {
3101         NTSTATUS status;
3102         struct pipe_auth_data *a;
3103         struct schannel_state *schannel_auth;
3104         struct gensec_security *gensec_security;
3105         DATA_BLOB sk = data_blob_null;
3106         bool make_dup = false;
3107
3108         if (!session_key || !cli) {
3109                 return NT_STATUS_INVALID_PARAMETER;
3110         }
3111
3112         a = cli->auth;
3113
3114         if (a == NULL) {
3115                 return NT_STATUS_INVALID_PARAMETER;
3116         }
3117
3118         switch (cli->auth->auth_type) {
3119         case DCERPC_AUTH_TYPE_SCHANNEL:
3120                 schannel_auth = talloc_get_type_abort(a->auth_ctx,
3121                                                       struct schannel_state);
3122                 sk = data_blob_const(schannel_auth->creds->session_key, 16);
3123                 make_dup = true;
3124                 break;
3125         case DCERPC_AUTH_TYPE_SPNEGO:
3126         case DCERPC_AUTH_TYPE_NTLMSSP:
3127         case DCERPC_AUTH_TYPE_KRB5:
3128                 gensec_security = talloc_get_type_abort(a->auth_ctx,
3129                                                 struct gensec_security);
3130                 status = gensec_session_key(gensec_security, mem_ctx, &sk);
3131                 if (!NT_STATUS_IS_OK(status)) {
3132                         return status;
3133                 }
3134                 make_dup = false;
3135                 break;
3136         case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
3137         case DCERPC_AUTH_TYPE_NONE:
3138                 sk = data_blob_const(a->user_session_key.data,
3139                                      a->user_session_key.length);
3140                 make_dup = true;
3141                 break;
3142         default:
3143                 break;
3144         }
3145
3146         if (!sk.data) {
3147                 return NT_STATUS_NO_USER_SESSION_KEY;
3148         }
3149
3150         if (make_dup) {
3151                 *session_key = data_blob_dup_talloc(mem_ctx, sk);
3152         } else {
3153                 *session_key = sk;
3154         }
3155
3156         return NT_STATUS_OK;
3157 }