source3/smbd/smb2_sesssetup.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   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 "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "../libcli/smb/smb_common.h"
  26 #include "../libcli/auth/spnego.h"
  27 #include "../libcli/auth/ntlmssp.h"
  28 #include "ntlmssp_wrap.h"
  29 #include "../librpc/gen_ndr/krb5pac.h"
  30 #include "libads/kerberos_proto.h"
  31 #include "../lib/util/asn1.h"
  32 #include "auth.h"
  33 #include "../lib/tsocket/tsocket.h"
  34 #include "../libcli/security/security.h"
  35
  36 static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *smb2req,
  37                                         uint64_t in_session_id,
  38                                         uint8_t in_security_mode,
  39                                         DATA_BLOB in_security_buffer,
  40                                         uint16_t *out_session_flags,
  41                                         DATA_BLOB *out_security_buffer,
  42                                         uint64_t *out_session_id);
  43
  44 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *smb2req)
  45 {
  46         const uint8_t *inhdr;
  47         const uint8_t *inbody;
  48         int i = smb2req->current_idx;
  49         uint8_t *outhdr;
  50         DATA_BLOB outbody;
  51         DATA_BLOB outdyn;
  52         size_t expected_body_size = 0x19;
  53         size_t body_size;
  54         uint64_t in_session_id;
  55         uint8_t in_security_mode;
  56         uint16_t in_security_offset;
  57         uint16_t in_security_length;
  58         DATA_BLOB in_security_buffer;
  59         uint16_t out_session_flags;
  60         uint64_t out_session_id;
  61         uint16_t out_security_offset;
  62         DATA_BLOB out_security_buffer;
  63         NTSTATUS status;
  64
  65         inhdr = (const uint8_t *)smb2req->in.vector[i+0].iov_base;
  66
  67         if (smb2req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  68                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
  69         }
  70
  71         inbody = (const uint8_t *)smb2req->in.vector[i+1].iov_base;
  72
  73         body_size = SVAL(inbody, 0x00);
  74         if (body_size != expected_body_size) {
  75                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
  76         }
  77
  78         in_security_offset = SVAL(inbody, 0x0C);
  79         in_security_length = SVAL(inbody, 0x0E);
  80
  81         if (in_security_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  82                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
  83         }
  84
  85         if (in_security_length > smb2req->in.vector[i+2].iov_len) {
  86                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
  87         }
  88
  89         in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
  90         in_security_mode = CVAL(inbody, 0x03);
  91         in_security_buffer.data = (uint8_t *)smb2req->in.vector[i+2].iov_base;
  92         in_security_buffer.length = in_security_length;
  93
  94         status = smbd_smb2_session_setup(smb2req,
  95                                          in_session_id,
  96                                          in_security_mode,
  97                                          in_security_buffer,
  98                                          &out_session_flags,
  99                                          &out_security_buffer,
 100                                          &out_session_id);
 101         if (!NT_STATUS_IS_OK(status) &&
 102             !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 103                 status = nt_status_squash(status);
 104                 return smbd_smb2_request_error(smb2req, status);
 105         }
 106
 107         out_security_offset = SMB2_HDR_BODY + 0x08;
 108
 109         outhdr = (uint8_t *)smb2req->out.vector[i].iov_base;
 110
 111         outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x08);
 112         if (outbody.data == NULL) {
 113                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 114         }
 115
 116         SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);
 117
 118         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 119         SSVAL(outbody.data, 0x02,
 120               out_session_flags);               /* session flags */
 121         SSVAL(outbody.data, 0x04,
 122               out_security_offset);             /* security buffer offset */
 123         SSVAL(outbody.data, 0x06,
 124               out_security_buffer.length);      /* security buffer length */
 125
 126         outdyn = out_security_buffer;
 127
 128         return smbd_smb2_request_done_ex(smb2req, status, outbody, &outdyn,
 129                                          __location__);
 130 }
 131
 132 static int smbd_smb2_session_destructor(struct smbd_smb2_session *session)
 133 {
 134         if (session->sconn == NULL) {
 135                 return 0;
 136         }
 137
 138         /* first free all tcons */
 139         while (session->tcons.list) {
 140                 talloc_free(session->tcons.list);
 141         }
 142
 143         idr_remove(session->sconn->smb2.sessions.idtree, session->vuid);
 144         DLIST_REMOVE(session->sconn->smb2.sessions.list, session);
 145         invalidate_vuid(session->sconn, session->vuid);
 146
 147         session->vuid = 0;
 148         session->status = NT_STATUS_USER_SESSION_DELETED;
 149         session->sconn = NULL;
 150
 151         return 0;
 152 }
 153
 154 #ifdef HAVE_KRB5
 155 static NTSTATUS smbd_smb2_session_setup_krb5(struct smbd_smb2_session *session,
 156                                         struct smbd_smb2_request *smb2req,
 157                                         uint8_t in_security_mode,
 158                                         const DATA_BLOB *secblob,
 159                                         const char *mechOID,
 160                                         uint16_t *out_session_flags,
 161                                         DATA_BLOB *out_security_buffer,
 162                                         uint64_t *out_session_id)
 163 {
 164         DATA_BLOB ap_rep = data_blob_null;
 165         DATA_BLOB ap_rep_wrapped = data_blob_null;
 166         DATA_BLOB ticket = data_blob_null;
 167         DATA_BLOB session_key = data_blob_null;
 168         DATA_BLOB secblob_out = data_blob_null;
 169         uint8 tok_id[2];
 170         struct PAC_LOGON_INFO *logon_info = NULL;
 171         char *principal = NULL;
 172         char *user = NULL;
 173         char *domain = NULL;
 174         struct passwd *pw = NULL;
 175         NTSTATUS status;
 176         char *real_username;
 177         fstring tmp;
 178         bool username_was_mapped = false;
 179         bool map_domainuser_to_guest = false;
 180
 181         if (!spnego_parse_krb5_wrap(talloc_tos(), *secblob, &ticket, tok_id)) {
 182                 status = NT_STATUS_LOGON_FAILURE;
 183                 goto fail;
 184         }
 185
 186         status = ads_verify_ticket(smb2req, lp_realm(), 0, &ticket,
 187                                    &principal, &logon_info, &ap_rep,
 188                                    &session_key, true);
 189
 190         if (!NT_STATUS_IS_OK(status)) {
 191                 DEBUG(1,("smb2: Failed to verify incoming ticket with error %s!\n",
 192                         nt_errstr(status)));
 193                 if (!NT_STATUS_EQUAL(status, NT_STATUS_TIME_DIFFERENCE_AT_DC)) {
 194                         status = NT_STATUS_LOGON_FAILURE;
 195                 }
 196                 goto fail;
 197         }
 198
 199         status = get_user_from_kerberos_info(talloc_tos(),
 200                                              session->sconn->remote_hostname,
 201                                              principal, logon_info,
 202                                              &username_was_mapped,
 203                                              &map_domainuser_to_guest,
 204                                              &user, &domain,
 205                                              &real_username, &pw);
 206         if (!NT_STATUS_IS_OK(status)) {
 207                 goto fail;
 208         }
 209
 210         /* save the PAC data if we have it */
 211         if (logon_info) {
 212                 netsamlogon_cache_store(user, &logon_info->info3);
 213         }
 214
 215         /* setup the string used by %U */
 216         sub_set_smb_name(real_username);
 217
 218         /* reload services so that the new %U is taken into account */
 219         reload_services(smb2req->sconn->msg_ctx, smb2req->sconn->sock, true);
 220
 221         status = make_session_info_krb5(session,
 222                                         user, domain, real_username, pw,
 223                                         logon_info, map_domainuser_to_guest,
 224                                         username_was_mapped,
 225                                         &session_key,
 226                                         &session->session_info);
 227         if (!NT_STATUS_IS_OK(status)) {
 228                 DEBUG(1, ("smb2: make_server_info_krb5 failed\n"));
 229                 goto fail;
 230         }
 231
 232         if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
 233              lp_server_signing() == Required) {
 234                 session->do_signing = true;
 235         }
 236
 237         if (security_session_user_level(session->session_info, NULL) < SECURITY_USER) {
 238                 /* we map anonymous to guest internally */
 239                 *out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
 240                 *out_session_flags |= SMB2_SESSION_FLAG_IS_NULL;
 241                 /* force no signing */
 242                 session->do_signing = false;
 243         }
 244
 245         session->session_key = session->session_info->session_key;
 246
 247         session->compat_vuser = talloc_zero(session, user_struct);
 248         if (session->compat_vuser == NULL) {
 249                 status = NT_STATUS_NO_MEMORY;
 250                 goto fail;
 251         }
 252         session->compat_vuser->auth_ntlmssp_state = NULL;
 253         session->compat_vuser->homes_snum = -1;
 254         session->compat_vuser->session_info = session->session_info;
 255         session->compat_vuser->session_keystr = NULL;
 256         session->compat_vuser->vuid = session->vuid;
 257         DLIST_ADD(session->sconn->smb1.sessions.validated_users, session->compat_vuser);
 258
 259         /* This is a potentially untrusted username */
 260         alpha_strcpy(tmp, user, ". _-$", sizeof(tmp));
 261         session->session_info->unix_info->sanitized_username =
 262                                 talloc_strdup(session->session_info, tmp);
 263
 264         if (security_session_user_level(session->session_info, NULL) >= SECURITY_USER) {
 265                 session->compat_vuser->homes_snum =
 266                         register_homes_share(session->session_info->unix_info->unix_name);
 267         }
 268
 269         if (!session_claim(session->sconn, session->compat_vuser)) {
 270                 DEBUG(1, ("smb2: Failed to claim session "
 271                         "for vuid=%d\n",
 272                         session->compat_vuser->vuid));
 273                 goto fail;
 274         }
 275
 276         session->status = NT_STATUS_OK;
 277
 278         /*
 279          * we attach the session to the request
 280          * so that the response can be signed
 281          */
 282         smb2req->session = session;
 283         if (session->do_signing) {
 284                 smb2req->do_signing = true;
 285         }
 286
 287         global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
 288         status = NT_STATUS_OK;
 289
 290         /* wrap that up in a nice GSS-API wrapping */
 291         ap_rep_wrapped = spnego_gen_krb5_wrap(talloc_tos(), ap_rep,
 292                                 TOK_ID_KRB_AP_REP);
 293
 294         secblob_out = spnego_gen_auth_response(
 295                                         talloc_tos(),
 296                                         &ap_rep_wrapped,
 297                                         status,
 298                                         mechOID);
 299
 300         *out_security_buffer = data_blob_talloc(smb2req,
 301                                                 secblob_out.data,
 302                                                 secblob_out.length);
 303         if (secblob_out.data && out_security_buffer->data == NULL) {
 304                 status = NT_STATUS_NO_MEMORY;
 305                 goto fail;
 306         }
 307
 308         data_blob_free(&ap_rep);
 309         data_blob_free(&ap_rep_wrapped);
 310         data_blob_free(&ticket);
 311         data_blob_free(&session_key);
 312         data_blob_free(&secblob_out);
 313
 314         *out_session_id = session->vuid;
 315
 316         return NT_STATUS_OK;
 317
 318   fail:
 319
 320         data_blob_free(&ap_rep);
 321         data_blob_free(&ap_rep_wrapped);
 322         data_blob_free(&ticket);
 323         data_blob_free(&session_key);
 324         data_blob_free(&secblob_out);
 325
 326         ap_rep_wrapped = data_blob_null;
 327         secblob_out = spnego_gen_auth_response(
 328                                         talloc_tos(),
 329                                         &ap_rep_wrapped,
 330                                         status,
 331                                         mechOID);
 332
 333         *out_security_buffer = data_blob_talloc(smb2req,
 334                                                 secblob_out.data,
 335                                                 secblob_out.length);
 336         data_blob_free(&secblob_out);
 337         return status;
 338 }
 339 #endif
 340
 341 static NTSTATUS smbd_smb2_spnego_negotiate(struct smbd_smb2_session *session,
 342                                         struct smbd_smb2_request *smb2req,
 343                                         uint8_t in_security_mode,
 344                                         DATA_BLOB in_security_buffer,
 345                                         uint16_t *out_session_flags,
 346                                         DATA_BLOB *out_security_buffer,
 347                                         uint64_t *out_session_id)
 348 {
 349         DATA_BLOB secblob_in = data_blob_null;
 350         DATA_BLOB chal_out = data_blob_null;
 351         char *kerb_mech = NULL;
 352         NTSTATUS status;
 353
 354         /* Ensure we have no old NTLM state around. */
 355         TALLOC_FREE(session->auth_ntlmssp_state);
 356
 357         status = parse_spnego_mechanisms(talloc_tos(), in_security_buffer,
 358                         &secblob_in, &kerb_mech);
 359         if (!NT_STATUS_IS_OK(status)) {
 360                 goto out;
 361         }
 362
 363 #ifdef HAVE_KRB5
 364         if (kerb_mech && ((lp_security()==SEC_ADS) ||
 365                                 USE_KERBEROS_KEYTAB) ) {
 366                 status = smbd_smb2_session_setup_krb5(session,
 367                                 smb2req,
 368                                 in_security_mode,
 369                                 &secblob_in,
 370                                 kerb_mech,
 371                                 out_session_flags,
 372                                 out_security_buffer,
 373                                 out_session_id);
 374
 375                 goto out;
 376         }
 377 #endif
 378
 379         if (kerb_mech) {
 380                 /* The mechtoken is a krb5 ticket, but
 381                  * we need to fall back to NTLM. */
 382
 383                 DEBUG(3,("smb2: Got krb5 ticket in SPNEGO "
 384                         "but set to downgrade to NTLMSSP\n"));
 385
 386                 status = NT_STATUS_MORE_PROCESSING_REQUIRED;
 387         } else {
 388                 /* Fall back to NTLMSSP. */
 389                 status = auth_ntlmssp_start(session->sconn->remote_address,
 390                                             &session->auth_ntlmssp_state);
 391                 if (!NT_STATUS_IS_OK(status)) {
 392                         goto out;
 393                 }
 394
 395                 status = auth_ntlmssp_update(session->auth_ntlmssp_state,
 396                                              talloc_tos(),
 397                                              secblob_in,
 398                                              &chal_out);
 399         }
 400
 401         if (!NT_STATUS_IS_OK(status) &&
 402                         !NT_STATUS_EQUAL(status,
 403                                 NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 404                 goto out;
 405         }
 406
 407         *out_security_buffer = spnego_gen_auth_response(smb2req,
 408                                                 &chal_out,
 409                                                 status,
 410                                                 OID_NTLMSSP);
 411         if (out_security_buffer->data == NULL) {
 412                 status = NT_STATUS_NO_MEMORY;
 413                 goto out;
 414         }
 415         *out_session_id = session->vuid;
 416
 417   out:
 418
 419         data_blob_free(&secblob_in);
 420         data_blob_free(&chal_out);
 421         TALLOC_FREE(kerb_mech);
 422         if (!NT_STATUS_IS_OK(status) &&
 423                         !NT_STATUS_EQUAL(status,
 424                                 NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 425                 TALLOC_FREE(session->auth_ntlmssp_state);
 426                 TALLOC_FREE(session);
 427         }
 428         return status;
 429 }
 430
 431 static NTSTATUS smbd_smb2_common_ntlmssp_auth_return(struct smbd_smb2_session *session,
 432                                         struct smbd_smb2_request *smb2req,
 433                                         uint8_t in_security_mode,
 434                                         DATA_BLOB in_security_buffer,
 435                                         uint16_t *out_session_flags,
 436                                         uint64_t *out_session_id)
 437 {
 438         fstring tmp;
 439
 440         if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
 441             lp_server_signing() == Required) {
 442                 session->do_signing = true;
 443         }
 444
 445         if (security_session_user_level(session->session_info, NULL) < SECURITY_USER) {
 446                 /* we map anonymous to guest internally */
 447                 *out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
 448                 *out_session_flags |= SMB2_SESSION_FLAG_IS_NULL;
 449                 /* force no signing */
 450                 session->do_signing = false;
 451         }
 452
 453         session->session_key = session->session_info->session_key;
 454
 455         session->compat_vuser = talloc_zero(session, user_struct);
 456         if (session->compat_vuser == NULL) {
 457                 TALLOC_FREE(session->auth_ntlmssp_state);
 458                 TALLOC_FREE(session);
 459                 return NT_STATUS_NO_MEMORY;
 460         }
 461         session->compat_vuser->auth_ntlmssp_state = session->auth_ntlmssp_state;
 462         session->compat_vuser->homes_snum = -1;
 463         session->compat_vuser->session_info = session->session_info;
 464         session->compat_vuser->session_keystr = NULL;
 465         session->compat_vuser->vuid = session->vuid;
 466         DLIST_ADD(session->sconn->smb1.sessions.validated_users, session->compat_vuser);
 467
 468         /* This is a potentially untrusted username */
 469         alpha_strcpy(tmp,
 470                      auth_ntlmssp_get_username(session->auth_ntlmssp_state),
 471                      ". _-$",
 472                      sizeof(tmp));
 473         session->session_info->unix_info->sanitized_username = talloc_strdup(
 474                 session->session_info, tmp);
 475
 476         if (security_session_user_level(session->session_info, NULL) >= SECURITY_USER) {
 477                 session->compat_vuser->homes_snum =
 478                         register_homes_share(session->session_info->unix_info->unix_name);
 479         }
 480
 481         if (!session_claim(session->sconn, session->compat_vuser)) {
 482                 DEBUG(1, ("smb2: Failed to claim session "
 483                         "for vuid=%d\n",
 484                         session->compat_vuser->vuid));
 485                 TALLOC_FREE(session->auth_ntlmssp_state);
 486                 TALLOC_FREE(session);
 487                 return NT_STATUS_LOGON_FAILURE;
 488         }
 489
 490
 491         session->status = NT_STATUS_OK;
 492
 493         /*
 494          * we attach the session to the request
 495          * so that the response can be signed
 496          */
 497         smb2req->session = session;
 498         if (session->do_signing) {
 499                 smb2req->do_signing = true;
 500         }
 501
 502         global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
 503
 504         *out_session_id = session->vuid;
 505
 506         return NT_STATUS_OK;
 507 }
 508
 509 static NTSTATUS smbd_smb2_spnego_auth(struct smbd_smb2_session *session,
 510                                         struct smbd_smb2_request *smb2req,
 511                                         uint8_t in_security_mode,
 512                                         DATA_BLOB in_security_buffer,
 513                                         uint16_t *out_session_flags,
 514                                         DATA_BLOB *out_security_buffer,
 515                                         uint64_t *out_session_id)
 516 {
 517         DATA_BLOB auth = data_blob_null;
 518         DATA_BLOB auth_out = data_blob_null;
 519         NTSTATUS status;
 520
 521         if (!spnego_parse_auth(talloc_tos(), in_security_buffer, &auth)) {
 522                 TALLOC_FREE(session);
 523                 return NT_STATUS_LOGON_FAILURE;
 524         }
 525
 526         if (auth.data[0] == ASN1_APPLICATION(0)) {
 527                 /* Might be a second negTokenTarg packet */
 528                 DATA_BLOB secblob_in = data_blob_null;
 529                 char *kerb_mech = NULL;
 530
 531                 status = parse_spnego_mechanisms(talloc_tos(),
 532                                 in_security_buffer,
 533                                 &secblob_in, &kerb_mech);
 534                 if (!NT_STATUS_IS_OK(status)) {
 535                         TALLOC_FREE(session);
 536                         return status;
 537                 }
 538
 539 #ifdef HAVE_KRB5
 540                 if (kerb_mech && ((lp_security()==SEC_ADS) ||
 541                                         USE_KERBEROS_KEYTAB) ) {
 542                         status = smbd_smb2_session_setup_krb5(session,
 543                                         smb2req,
 544                                         in_security_mode,
 545                                         &secblob_in,
 546                                         kerb_mech,
 547                                         out_session_flags,
 548                                         out_security_buffer,
 549                                         out_session_id);
 550
 551                         data_blob_free(&secblob_in);
 552                         TALLOC_FREE(kerb_mech);
 553                         if (!NT_STATUS_IS_OK(status)) {
 554                                 TALLOC_FREE(session);
 555                         }
 556                         return status;
 557                 }
 558 #endif
 559
 560                 /* Can't blunder into NTLMSSP auth if we have
 561                  * a krb5 ticket. */
 562
 563                 if (kerb_mech) {
 564                         DEBUG(3,("smb2: network "
 565                                 "misconfiguration, client sent us a "
 566                                 "krb5 ticket and kerberos security "
 567                                 "not enabled\n"));
 568                         TALLOC_FREE(session);
 569                         data_blob_free(&secblob_in);
 570                         TALLOC_FREE(kerb_mech);
 571                         return NT_STATUS_LOGON_FAILURE;
 572                 }
 573
 574                 data_blob_free(&secblob_in);
 575         }
 576
 577         if (session->auth_ntlmssp_state == NULL) {
 578                 status = auth_ntlmssp_start(session->sconn->remote_address,
 579                                             &session->auth_ntlmssp_state);
 580                 if (!NT_STATUS_IS_OK(status)) {
 581                         data_blob_free(&auth);
 582                         TALLOC_FREE(session);
 583                         return status;
 584                 }
 585         }
 586
 587         status = auth_ntlmssp_update(session->auth_ntlmssp_state,
 588                                      talloc_tos(), auth,
 589                                      &auth_out);
 590         /* If status is NT_STATUS_OK then we need to get the token.
 591          * Map to guest is now internal to auth_ntlmssp */
 592         if (NT_STATUS_IS_OK(status)) {
 593                 status = auth_ntlmssp_steal_session_info(session,
 594                                 session->auth_ntlmssp_state,
 595                                 &session->session_info);
 596         }
 597
 598         if (!NT_STATUS_IS_OK(status) &&
 599                         !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 600                 TALLOC_FREE(session->auth_ntlmssp_state);
 601                 data_blob_free(&auth);
 602                 TALLOC_FREE(session);
 603                 return status;
 604         }
 605
 606         data_blob_free(&auth);
 607
 608         *out_security_buffer = spnego_gen_auth_response(smb2req,
 609                                 &auth_out, status, NULL);
 610
 611         if (out_security_buffer->data == NULL) {
 612                 TALLOC_FREE(session->auth_ntlmssp_state);
 613                 TALLOC_FREE(session);
 614                 return NT_STATUS_NO_MEMORY;
 615         }
 616
 617         *out_session_id = session->vuid;
 618
 619         if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 620                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 621         }
 622
 623         /* We're done - claim the session. */
 624         return smbd_smb2_common_ntlmssp_auth_return(session,
 625                                                 smb2req,
 626                                                 in_security_mode,
 627                                                 in_security_buffer,
 628                                                 out_session_flags,
 629                                                 out_session_id);
 630 }
 631
 632 static NTSTATUS smbd_smb2_raw_ntlmssp_auth(struct smbd_smb2_session *session,
 633                                         struct smbd_smb2_request *smb2req,
 634                                         uint8_t in_security_mode,
 635                                         DATA_BLOB in_security_buffer,
 636                                         uint16_t *out_session_flags,
 637                                         DATA_BLOB *out_security_buffer,
 638                                         uint64_t *out_session_id)
 639 {
 640         NTSTATUS status;
 641
 642         if (session->auth_ntlmssp_state == NULL) {
 643                 status = auth_ntlmssp_start(session->sconn->remote_address,
 644                                             &session->auth_ntlmssp_state);
 645                 if (!NT_STATUS_IS_OK(status)) {
 646                         TALLOC_FREE(session);
 647                         return status;
 648                 }
 649         }
 650
 651         /* RAW NTLMSSP */
 652         status = auth_ntlmssp_update(session->auth_ntlmssp_state,
 653                                      smb2req,
 654                                      in_security_buffer,
 655                                      out_security_buffer);
 656
 657         if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 658                 *out_session_id = session->vuid;
 659                 return status;
 660         }
 661
 662         status = auth_ntlmssp_steal_session_info(session,
 663                                                  session->auth_ntlmssp_state,
 664                                                  &session->session_info);
 665
 666         if (!NT_STATUS_IS_OK(status)) {
 667                 TALLOC_FREE(session->auth_ntlmssp_state);
 668                 TALLOC_FREE(session);
 669                 return status;
 670         }
 671         *out_session_id = session->vuid;
 672
 673         return smbd_smb2_common_ntlmssp_auth_return(session,
 674                                                 smb2req,
 675                                                 in_security_mode,
 676                                                 in_security_buffer,
 677                                                 out_session_flags,
 678                                                 out_session_id);
 679 }
 680
 681 static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *smb2req,
 682                                         uint64_t in_session_id,
 683                                         uint8_t in_security_mode,
 684                                         DATA_BLOB in_security_buffer,
 685                                         uint16_t *out_session_flags,
 686                                         DATA_BLOB *out_security_buffer,
 687                                         uint64_t *out_session_id)
 688 {
 689         struct smbd_smb2_session *session;
 690
 691         *out_session_flags = 0;
 692         *out_session_id = 0;
 693
 694         if (in_session_id == 0) {
 695                 int id;
 696
 697                 /* create a new session */
 698                 session = talloc_zero(smb2req->sconn, struct smbd_smb2_session);
 699                 if (session == NULL) {
 700                         return NT_STATUS_NO_MEMORY;
 701                 }
 702                 session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
 703                 id = idr_get_new_random(smb2req->sconn->smb2.sessions.idtree,
 704                                         session,
 705                                         smb2req->sconn->smb2.sessions.limit);
 706                 if (id == -1) {
 707                         return NT_STATUS_INSUFFICIENT_RESOURCES;
 708                 }
 709                 session->vuid = id;
 710
 711                 session->tcons.idtree = idr_init(session);
 712                 if (session->tcons.idtree == NULL) {
 713                         return NT_STATUS_NO_MEMORY;
 714                 }
 715                 session->tcons.limit = 0x0000FFFE;
 716                 session->tcons.list = NULL;
 717
 718                 DLIST_ADD_END(smb2req->sconn->smb2.sessions.list, session,
 719                               struct smbd_smb2_session *);
 720                 session->sconn = smb2req->sconn;
 721                 talloc_set_destructor(session, smbd_smb2_session_destructor);
 722         } else {
 723                 void *p;
 724
 725                 /* lookup an existing session */
 726                 p = idr_find(smb2req->sconn->smb2.sessions.idtree, in_session_id);
 727                 if (p == NULL) {
 728                         return NT_STATUS_USER_SESSION_DELETED;
 729                 }
 730                 session = talloc_get_type_abort(p, struct smbd_smb2_session);
 731         }
 732
 733         if (NT_STATUS_IS_OK(session->status)) {
 734                 return NT_STATUS_REQUEST_NOT_ACCEPTED;
 735         }
 736
 737         if (in_security_buffer.data[0] == ASN1_APPLICATION(0)) {
 738                 return smbd_smb2_spnego_negotiate(session,
 739                                                 smb2req,
 740                                                 in_security_mode,
 741                                                 in_security_buffer,
 742                                                 out_session_flags,
 743                                                 out_security_buffer,
 744                                                 out_session_id);
 745         } else if (in_security_buffer.data[0] == ASN1_CONTEXT(1)) {
 746                 return smbd_smb2_spnego_auth(session,
 747                                                 smb2req,
 748                                                 in_security_mode,
 749                                                 in_security_buffer,
 750                                                 out_session_flags,
 751                                                 out_security_buffer,
 752                                                 out_session_id);
 753         } else if (strncmp((char *)(in_security_buffer.data), "NTLMSSP", 7) == 0) {
 754                 return smbd_smb2_raw_ntlmssp_auth(session,
 755                                                 smb2req,
 756                                                 in_security_mode,
 757                                                 in_security_buffer,
 758                                                 out_session_flags,
 759                                                 out_security_buffer,
 760                                                 out_session_id);
 761         }
 762
 763         /* Unknown packet type. */
 764         DEBUG(1,("Unknown packet type %u in smb2 sessionsetup\n",
 765                 (unsigned int)in_security_buffer.data[0] ));
 766         TALLOC_FREE(session->auth_ntlmssp_state);
 767         TALLOC_FREE(session);
 768         return NT_STATUS_LOGON_FAILURE;
 769 }
 770
 771 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
 772 {
 773         const uint8_t *inbody;
 774         int i = req->current_idx;
 775         DATA_BLOB outbody;
 776         size_t expected_body_size = 0x04;
 777         size_t body_size;
 778
 779         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
 780                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 781         }
 782
 783         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
 784
 785         body_size = SVAL(inbody, 0x00);
 786         if (body_size != expected_body_size) {
 787                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 788         }
 789
 790         /*
 791          * TODO: cancel all outstanding requests on the session
 792          *       and delete all tree connections.
 793          */
 794         smbd_smb2_session_destructor(req->session);
 795         /*
 796          * we may need to sign the response, so we need to keep
 797          * the session until the response is sent to the wire.
 798          */
 799         talloc_steal(req, req->session);
 800
 801         outbody = data_blob_talloc(req->out.vector, NULL, 0x04);
 802         if (outbody.data == NULL) {
 803                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 804         }
 805
 806         SSVAL(outbody.data, 0x00, 0x04);        /* struct size */
 807         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 808
 809         return smbd_smb2_request_done(req, outbody, NULL);
 810 }