auth/ntlmssp/ntlmssp_server.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    handle NTLMSSP, server side
   5
   6    Copyright (C) Andrew Tridgell      2001
   7    Copyright (C) Andrew Bartlett 2001-2010
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include <tevent.h>
  25 #include "lib/util/tevent_ntstatus.h"
  26 #include "lib/util/time_basic.h"
  27 #include "auth/ntlmssp/ntlmssp.h"
  28 #include "auth/ntlmssp/ntlmssp_private.h"
  29 #include "../librpc/gen_ndr/ndr_ntlmssp.h"
  30 #include "auth/ntlmssp/ntlmssp_ndr.h"
  31 #include "../libcli/auth/libcli_auth.h"
  32 #include "../lib/crypto/crypto.h"
  33 #include "auth/gensec/gensec.h"
  34 #include "auth/gensec/gensec_internal.h"
  35 #include "auth/common_auth.h"
  36 #include "param/param.h"
  37 #include "param/loadparm.h"
  38 #include "libcli/security/session.h"
  39
  40 /**
  41  * Determine correct target name flags for reply, given server role
  42  * and negotiated flags
  43  *
  44  * @param ntlmssp_state NTLMSSP State
  45  * @param neg_flags The flags from the packet
  46  * @param chal_flags The flags to be set in the reply packet
  47  * @return The 'target name' string.
  48  */
  49
  50 const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
  51                                 uint32_t neg_flags, uint32_t *chal_flags)
  52 {
  53         if (neg_flags & NTLMSSP_REQUEST_TARGET) {
  54                 *chal_flags |= NTLMSSP_NEGOTIATE_TARGET_INFO;
  55                 *chal_flags |= NTLMSSP_REQUEST_TARGET;
  56                 if (ntlmssp_state->server.is_standalone) {
  57                         *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
  58                         return ntlmssp_state->server.netbios_name;
  59                 } else {
  60                         *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
  61                         return ntlmssp_state->server.netbios_domain;
  62                 };
  63         } else {
  64                 return "";
  65         }
  66 }
  67
  68 /**
  69  * Next state function for the NTLMSSP Negotiate packet
  70  *
  71  * @param gensec_security GENSEC state
  72  * @param out_mem_ctx Memory context for *out
  73  * @param in The request, as a DATA_BLOB.  reply.data must be NULL
  74  * @param out The reply, as an allocated DATA_BLOB, caller to free.
  75  * @return Errors or MORE_PROCESSING_REQUIRED if (normal) a reply is required.
  76  */
  77
  78 NTSTATUS gensec_ntlmssp_server_negotiate(struct gensec_security *gensec_security,
  79                                          TALLOC_CTX *out_mem_ctx,
  80                                          const DATA_BLOB request, DATA_BLOB *reply)
  81 {
  82         struct gensec_ntlmssp_context *gensec_ntlmssp =
  83                 talloc_get_type_abort(gensec_security->private_data,
  84                                       struct gensec_ntlmssp_context);
  85         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
  86         struct auth4_context *auth_context = gensec_security->auth_context;
  87         DATA_BLOB struct_blob;
  88         uint32_t neg_flags = 0;
  89         uint32_t ntlmssp_command, chal_flags;
  90         uint8_t cryptkey[8];
  91         const char *target_name;
  92         NTSTATUS status;
  93         struct timeval tv_now = timeval_current();
  94         /*
  95          * See [MS-NLMP]
  96          *
  97          * Windows NT 4.0, windows_2000: use 30 minutes,
  98          * Windows XP, Windows Server 2003, Windows Vista,
  99          * Windows Server 2008, Windows 7, and Windows Server 2008 R2
 100          * use 36 hours.
 101          *
 102          * Newer systems doesn't check this, likely because the
 103          * connectionless NTLMSSP is no longer supported.
 104          *
 105          * As we expect the AUTHENTICATION_MESSAGE to arrive
 106          * directly after the NEGOTIATE_MESSAGE (typically less than
 107          * as 1 second later). We use a hard timeout of 30 Minutes.
 108          *
 109          * We don't look at AUTHENTICATE_MESSAGE.NtChallengeResponse.TimeStamp
 110          * instead we just remember our own time.
 111          */
 112         uint32_t max_lifetime = 30 * 60;
 113         struct timeval tv_end = timeval_add(&tv_now, max_lifetime, 0);
 114
 115         /* parse the NTLMSSP packet */
 116 #if 0
 117         file_save("ntlmssp_negotiate.dat", request.data, request.length);
 118 #endif
 119
 120         if (request.length) {
 121                 if (request.length > UINT16_MAX) {
 122                         DEBUG(1, ("ntlmssp_server_negotiate: reject large request of length %u\n",
 123                                 (unsigned int)request.length));
 124                         return NT_STATUS_INVALID_PARAMETER;
 125                 }
 126
 127                 if ((request.length < 16) || !msrpc_parse(ntlmssp_state, &request, "Cdd",
 128                                                           "NTLMSSP",
 129                                                           &ntlmssp_command,
 130                                                           &neg_flags)) {
 131                         DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP Negotiate of length %u\n",
 132                                 (unsigned int)request.length));
 133                         dump_data(2, request.data, request.length);
 134                         return NT_STATUS_INVALID_PARAMETER;
 135                 }
 136                 debug_ntlmssp_flags(neg_flags);
 137
 138                 if (DEBUGLEVEL >= 10) {
 139                         struct NEGOTIATE_MESSAGE *negotiate = talloc(
 140                                 ntlmssp_state, struct NEGOTIATE_MESSAGE);
 141                         if (negotiate != NULL) {
 142                                 status = ntlmssp_pull_NEGOTIATE_MESSAGE(
 143                                         &request, negotiate, negotiate);
 144                                 if (NT_STATUS_IS_OK(status)) {
 145                                         NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
 146                                                         negotiate);
 147                                 }
 148                                 TALLOC_FREE(negotiate);
 149                         }
 150                 }
 151         }
 152
 153         status = ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, "negotiate");
 154         if (!NT_STATUS_IS_OK(status)){
 155                 return status;
 156         }
 157
 158         /* Ask our caller what challenge they would like in the packet */
 159         if (auth_context->get_ntlm_challenge) {
 160                 status = auth_context->get_ntlm_challenge(auth_context, cryptkey);
 161                 if (!NT_STATUS_IS_OK(status)) {
 162                         DEBUG(1, ("gensec_ntlmssp_server_negotiate: failed to get challenge: %s\n",
 163                                   nt_errstr(status)));
 164                         return status;
 165                 }
 166         } else {
 167                 DEBUG(1, ("gensec_ntlmssp_server_negotiate: backend doesn't give a challenge\n"));
 168                 return NT_STATUS_NOT_IMPLEMENTED;
 169         }
 170
 171         /* The flags we send back are not just the negotiated flags,
 172          * they are also 'what is in this packet'.  Therfore, we
 173          * operate on 'chal_flags' from here on
 174          */
 175
 176         chal_flags = ntlmssp_state->neg_flags;
 177         ntlmssp_state->server.challenge_endtime = timeval_to_nttime(&tv_end);
 178
 179         /* get the right name to fill in as 'target' */
 180         target_name = ntlmssp_target_name(ntlmssp_state,
 181                                           neg_flags, &chal_flags);
 182         if (target_name == NULL)
 183                 return NT_STATUS_INVALID_PARAMETER;
 184
 185         ntlmssp_state->chal = data_blob_talloc(ntlmssp_state, cryptkey, 8);
 186         ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state,
 187                                                         cryptkey, 8);
 188
 189         /* This creates the 'blob' of names that appears at the end of the packet */
 190         if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
 191                 enum ndr_err_code err;
 192                 struct AV_PAIR *pairs = NULL;
 193                 uint32_t count = 5;
 194
 195                 pairs = talloc_zero_array(ntlmssp_state, struct AV_PAIR, count + 1);
 196                 if (pairs == NULL) {
 197                         return NT_STATUS_NO_MEMORY;
 198                 }
 199
 200                 pairs[0].AvId                   = MsvAvNbDomainName;
 201                 pairs[0].Value.AvNbDomainName   = target_name;
 202
 203                 pairs[1].AvId                   = MsvAvNbComputerName;
 204                 pairs[1].Value.AvNbComputerName = ntlmssp_state->server.netbios_name;
 205
 206                 pairs[2].AvId                   = MsvAvDnsDomainName;
 207                 pairs[2].Value.AvDnsDomainName  = ntlmssp_state->server.dns_domain;
 208
 209                 pairs[3].AvId                   = MsvAvDnsComputerName;
 210                 pairs[3].Value.AvDnsComputerName= ntlmssp_state->server.dns_name;
 211
 212                 if (!ntlmssp_state->force_old_spnego) {
 213                         pairs[4].AvId                   = MsvAvTimestamp;
 214                         pairs[4].Value.AvTimestamp      =
 215                                                 timeval_to_nttime(&tv_now);
 216                         count += 1;
 217
 218                         pairs[5].AvId                   = MsvAvEOL;
 219                 } else {
 220                         pairs[4].AvId                   = MsvAvEOL;
 221                 }
 222
 223                 ntlmssp_state->server.av_pair_list.count = count;
 224                 ntlmssp_state->server.av_pair_list.pair = pairs;
 225
 226                 err = ndr_push_struct_blob(&struct_blob,
 227                                         ntlmssp_state,
 228                                         &ntlmssp_state->server.av_pair_list,
 229                                         (ndr_push_flags_fn_t)ndr_push_AV_PAIR_LIST);
 230                 if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
 231                         return NT_STATUS_NO_MEMORY;
 232                 }
 233         } else {
 234                 struct_blob = data_blob_null;
 235         }
 236
 237         {
 238                 /* Marshal the packet in the right format, be it unicode or ASCII */
 239                 const char *gen_string;
 240                 const DATA_BLOB version_blob = ntlmssp_version_blob();
 241
 242                 if (ntlmssp_state->unicode) {
 243                         gen_string = "CdUdbddBb";
 244                 } else {
 245                         gen_string = "CdAdbddBb";
 246                 }
 247
 248                 status = msrpc_gen(out_mem_ctx, reply, gen_string,
 249                         "NTLMSSP",
 250                         NTLMSSP_CHALLENGE,
 251                         target_name,
 252                         chal_flags,
 253                         cryptkey, 8,
 254                         0, 0,
 255                         struct_blob.data, struct_blob.length,
 256                         version_blob.data, version_blob.length);
 257
 258                 if (!NT_STATUS_IS_OK(status)) {
 259                         data_blob_free(&struct_blob);
 260                         return status;
 261                 }
 262
 263                 if (DEBUGLEVEL >= 10) {
 264                         struct CHALLENGE_MESSAGE *challenge = talloc(
 265                                 ntlmssp_state, struct CHALLENGE_MESSAGE);
 266                         if (challenge != NULL) {
 267                                 challenge->NegotiateFlags = chal_flags;
 268                                 status = ntlmssp_pull_CHALLENGE_MESSAGE(
 269                                         reply, challenge, challenge);
 270                                 if (NT_STATUS_IS_OK(status)) {
 271                                         NDR_PRINT_DEBUG(CHALLENGE_MESSAGE,
 272                                                         challenge);
 273                                 }
 274                                 TALLOC_FREE(challenge);
 275                         }
 276                 }
 277         }
 278
 279         data_blob_free(&struct_blob);
 280
 281         ntlmssp_state->negotiate_blob = data_blob_dup_talloc(ntlmssp_state,
 282                                                              request);
 283         if (ntlmssp_state->negotiate_blob.length != request.length) {
 284                 return NT_STATUS_NO_MEMORY;
 285         }
 286
 287         ntlmssp_state->challenge_blob = data_blob_dup_talloc(ntlmssp_state,
 288                                                              *reply);
 289         if (ntlmssp_state->challenge_blob.length != reply->length) {
 290                 return NT_STATUS_NO_MEMORY;
 291         }
 292
 293         ntlmssp_state->expected_state = NTLMSSP_AUTH;
 294
 295         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 296 }
 297
 298 struct ntlmssp_server_auth_state {
 299         struct gensec_security *gensec_security;
 300         struct gensec_ntlmssp_context *gensec_ntlmssp;
 301         DATA_BLOB in;
 302         struct auth_usersupplied_info *user_info;
 303         DATA_BLOB user_session_key;
 304         DATA_BLOB lm_session_key;
 305         /* internal variables used by KEY_EXCH (client-supplied user session key */
 306         DATA_BLOB encrypted_session_key;
 307         bool doing_ntlm2;
 308         /* internal variables used by NTLM2 */
 309         uint8_t session_nonce[16];
 310 };
 311
 312 static NTSTATUS ntlmssp_server_preauth(struct gensec_security *gensec_security,
 313                                        struct gensec_ntlmssp_context *gensec_ntlmssp,
 314                                        struct ntlmssp_server_auth_state *state,
 315                                        const DATA_BLOB request);
 316 static void ntlmssp_server_auth_done(struct tevent_req *subreq);
 317 static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
 318                                         struct gensec_ntlmssp_context *gensec_ntlmssp,
 319                                         struct ntlmssp_server_auth_state *state,
 320                                         DATA_BLOB request);
 321
 322 struct tevent_req *ntlmssp_server_auth_send(TALLOC_CTX *mem_ctx,
 323                                             struct tevent_context *ev,
 324                                             struct gensec_security *gensec_security,
 325                                             const DATA_BLOB in)
 326 {
 327         struct gensec_ntlmssp_context *gensec_ntlmssp =
 328                 talloc_get_type_abort(gensec_security->private_data,
 329                                       struct gensec_ntlmssp_context);
 330         struct auth4_context *auth_context = gensec_security->auth_context;
 331         struct tevent_req *req = NULL;
 332         struct ntlmssp_server_auth_state *state = NULL;
 333         uint8_t authoritative = 0;
 334         NTSTATUS status;
 335
 336         req = tevent_req_create(mem_ctx, &state,
 337                                 struct ntlmssp_server_auth_state);
 338         if (req == NULL) {
 339                 return NULL;
 340         }
 341         state->gensec_security = gensec_security;
 342         state->gensec_ntlmssp = gensec_ntlmssp;
 343         state->in = in;
 344
 345         status = ntlmssp_server_preauth(gensec_security,
 346                                         gensec_ntlmssp,
 347                                         state, in);
 348         if (tevent_req_nterror(req, status)) {
 349                 return tevent_req_post(req, ev);
 350         }
 351
 352         if (auth_context->check_ntlm_password_send != NULL) {
 353                 struct tevent_req *subreq = NULL;
 354
 355                 subreq = auth_context->check_ntlm_password_send(state, ev,
 356                                                 auth_context,
 357                                                 state->user_info);
 358                 if (tevent_req_nomem(subreq, req)) {
 359                         return tevent_req_post(req, ev);
 360                 }
 361                 tevent_req_set_callback(subreq,
 362                                         ntlmssp_server_auth_done,
 363                                         req);
 364                 return req;
 365         }
 366
 367         if (auth_context->check_ntlm_password == NULL) {
 368                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 369                 return tevent_req_post(req, ev);
 370         }
 371
 372         status = auth_context->check_ntlm_password(auth_context,
 373                                                    gensec_ntlmssp,
 374                                                    state->user_info,
 375                                                    &authoritative,
 376                                                    &gensec_ntlmssp->server_returned_info,
 377                                                    &state->user_session_key,
 378                                                    &state->lm_session_key);
 379         if (!NT_STATUS_IS_OK(status)) {
 380                 DBG_INFO("Checking NTLMSSP password for %s\\%s failed: %s\n",
 381                          state->user_info->client.domain_name,
 382                          state->user_info->client.account_name,
 383                          nt_errstr(status));
 384         }
 385         if (tevent_req_nterror(req, status)) {
 386                 return tevent_req_post(req, ev);
 387         }
 388         talloc_steal(state, state->user_session_key.data);
 389         talloc_steal(state, state->lm_session_key.data);
 390
 391         status = ntlmssp_server_postauth(gensec_security,
 392                                          gensec_ntlmssp,
 393                                          state, in);
 394         if (tevent_req_nterror(req, status)) {
 395                 return tevent_req_post(req, ev);
 396         }
 397
 398         tevent_req_done(req);
 399         return tevent_req_post(req, ev);
 400 }
 401
 402 /**
 403  * Next state function for the Authenticate packet
 404  *
 405  * @param ntlmssp_state NTLMSSP State
 406  * @param request The request, as a DATA_BLOB
 407  * @return Errors or NT_STATUS_OK.
 408  */
 409
 410 static NTSTATUS ntlmssp_server_preauth(struct gensec_security *gensec_security,
 411                                        struct gensec_ntlmssp_context *gensec_ntlmssp,
 412                                        struct ntlmssp_server_auth_state *state,
 413                                        const DATA_BLOB request)
 414 {
 415         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
 416         struct auth4_context *auth_context = gensec_security->auth_context;
 417         struct auth_usersupplied_info *user_info = NULL;
 418         uint32_t ntlmssp_command, auth_flags;
 419         NTSTATUS nt_status;
 420         const unsigned int version_len = 8;
 421         DATA_BLOB version_blob = data_blob_null;
 422         const unsigned int mic_len = NTLMSSP_MIC_SIZE;
 423         DATA_BLOB mic_blob = data_blob_null;
 424         uint8_t session_nonce_hash[16];
 425         const char *parse_string;
 426         bool ok;
 427         struct timeval endtime;
 428         bool expired = false;
 429
 430 #if 0
 431         file_save("ntlmssp_auth.dat", request.data, request.length);
 432 #endif
 433
 434         if (ntlmssp_state->unicode) {
 435                 parse_string = "CdBBUUUBdbb";
 436         } else {
 437                 parse_string = "CdBBAAABdbb";
 438         }
 439
 440         /* zero these out */
 441         data_blob_free(&ntlmssp_state->session_key);
 442         data_blob_free(&ntlmssp_state->lm_resp);
 443         data_blob_free(&ntlmssp_state->nt_resp);
 444
 445         ntlmssp_state->user = NULL;
 446         ntlmssp_state->domain = NULL;
 447         ntlmssp_state->client.netbios_name = NULL;
 448
 449         /* now the NTLMSSP encoded auth hashes */
 450         ok = msrpc_parse(ntlmssp_state, &request, parse_string,
 451                          "NTLMSSP",
 452                          &ntlmssp_command,
 453                          &ntlmssp_state->lm_resp,
 454                          &ntlmssp_state->nt_resp,
 455                          &ntlmssp_state->domain,
 456                          &ntlmssp_state->user,
 457                          &ntlmssp_state->client.netbios_name,
 458                          &state->encrypted_session_key,
 459                          &auth_flags,
 460                          &version_blob, version_len,
 461                          &mic_blob, mic_len);
 462         if (!ok) {
 463                 DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
 464                 dump_data(10, request.data, request.length);
 465
 466                 data_blob_free(&version_blob);
 467                 data_blob_free(&mic_blob);
 468
 469                 if (ntlmssp_state->unicode) {
 470                         parse_string = "CdBBUUUBd";
 471                 } else {
 472                         parse_string = "CdBBAAABd";
 473                 }
 474
 475                 ok = msrpc_parse(ntlmssp_state, &request, parse_string,
 476                                  "NTLMSSP",
 477                                  &ntlmssp_command,
 478                                  &ntlmssp_state->lm_resp,
 479                                  &ntlmssp_state->nt_resp,
 480                                  &ntlmssp_state->domain,
 481                                  &ntlmssp_state->user,
 482                                  &ntlmssp_state->client.netbios_name,
 483                                  &state->encrypted_session_key,
 484                                  &auth_flags);
 485         }
 486
 487         if (!ok) {
 488                 DEBUG(10, ("ntlmssp_server_auth: failed to parse NTLMSSP (nonfatal):\n"));
 489                 dump_data(10, request.data, request.length);
 490
 491                 /* zero this out */
 492                 data_blob_free(&state->encrypted_session_key);
 493                 auth_flags = 0;
 494
 495                 /* Try again with a shorter string (Win9X truncates this packet) */
 496                 if (ntlmssp_state->unicode) {
 497                         parse_string = "CdBBUUU";
 498                 } else {
 499                         parse_string = "CdBBAAA";
 500                 }
 501
 502                 /* now the NTLMSSP encoded auth hashes */
 503                 if (!msrpc_parse(ntlmssp_state, &request, parse_string,
 504                                  "NTLMSSP",
 505                                  &ntlmssp_command,
 506                                  &ntlmssp_state->lm_resp,
 507                                  &ntlmssp_state->nt_resp,
 508                                  &ntlmssp_state->domain,
 509                                  &ntlmssp_state->user,
 510                                  &ntlmssp_state->client.netbios_name)) {
 511                         DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP (tried both formats):\n"));
 512                         dump_data(2, request.data, request.length);
 513
 514                         return NT_STATUS_INVALID_PARAMETER;
 515                 }
 516         }
 517
 518         talloc_steal(state, state->encrypted_session_key.data);
 519
 520         if (auth_flags != 0) {
 521                 nt_status = ntlmssp_handle_neg_flags(ntlmssp_state,
 522                                                      auth_flags,
 523                                                      "authenticate");
 524                 if (!NT_STATUS_IS_OK(nt_status)){
 525                         return nt_status;
 526                 }
 527         }
 528
 529         if (DEBUGLEVEL >= 10) {
 530                 struct AUTHENTICATE_MESSAGE *authenticate = talloc(
 531                         ntlmssp_state, struct AUTHENTICATE_MESSAGE);
 532                 if (authenticate != NULL) {
 533                         NTSTATUS status;
 534                         authenticate->NegotiateFlags = auth_flags;
 535                         status = ntlmssp_pull_AUTHENTICATE_MESSAGE(
 536                                 &request, authenticate, authenticate);
 537                         if (NT_STATUS_IS_OK(status)) {
 538                                 NDR_PRINT_DEBUG(AUTHENTICATE_MESSAGE,
 539                                                 authenticate);
 540                         }
 541                         TALLOC_FREE(authenticate);
 542                 }
 543         }
 544
 545         DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
 546                  ntlmssp_state->user, ntlmssp_state->domain,
 547                  ntlmssp_state->client.netbios_name,
 548                  (unsigned long)ntlmssp_state->lm_resp.length,
 549                  (unsigned long)ntlmssp_state->nt_resp.length));
 550
 551 #if 0
 552         file_save("nthash1.dat",  &ntlmssp_state->nt_resp.data,  &ntlmssp_state->nt_resp.length);
 553         file_save("lmhash1.dat",  &ntlmssp_state->lm_resp.data,  &ntlmssp_state->lm_resp.length);
 554 #endif
 555
 556         if (ntlmssp_state->nt_resp.length > 24) {
 557                 struct NTLMv2_RESPONSE v2_resp;
 558                 enum ndr_err_code err;
 559                 uint32_t i = 0;
 560                 uint32_t count = 0;
 561                 const struct AV_PAIR *flags = NULL;
 562                 const struct AV_PAIR *eol = NULL;
 563                 uint32_t av_flags = 0;
 564
 565                 err = ndr_pull_struct_blob(&ntlmssp_state->nt_resp,
 566                                         ntlmssp_state,
 567                                         &v2_resp,
 568                                         (ndr_pull_flags_fn_t)ndr_pull_NTLMv2_RESPONSE);
 569                 if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
 570                         nt_status = ndr_map_error2ntstatus(err);
 571                         DEBUG(1,("%s: failed to parse NTLMv2_RESPONSE of length %zu for "
 572                                  "user=[%s] domain=[%s] workstation=[%s] - %s %s\n",
 573                                  __func__, ntlmssp_state->nt_resp.length,
 574                                  ntlmssp_state->user, ntlmssp_state->domain,
 575                                  ntlmssp_state->client.netbios_name,
 576                                  ndr_errstr(err), nt_errstr(nt_status)));
 577                         return nt_status;
 578                 }
 579
 580                 if (DEBUGLVL(10)) {
 581                         NDR_PRINT_DEBUG(NTLMv2_RESPONSE, &v2_resp);
 582                 }
 583
 584                 eol = ndr_ntlmssp_find_av(&v2_resp.Challenge.AvPairs,
 585                                           MsvAvEOL);
 586                 if (eol == NULL) {
 587                         DEBUG(1,("%s: missing MsvAvEOL for "
 588                                  "user=[%s] domain=[%s] workstation=[%s]\n",
 589                                  __func__, ntlmssp_state->user, ntlmssp_state->domain,
 590                                  ntlmssp_state->client.netbios_name));
 591                         return NT_STATUS_INVALID_PARAMETER;
 592                 }
 593
 594                 flags = ndr_ntlmssp_find_av(&v2_resp.Challenge.AvPairs,
 595                                             MsvAvFlags);
 596                 if (flags != NULL) {
 597                         av_flags = flags->Value.AvFlags;
 598                 }
 599
 600                 if (av_flags & NTLMSSP_AVFLAG_MIC_IN_AUTHENTICATE_MESSAGE) {
 601                         if (mic_blob.length != NTLMSSP_MIC_SIZE) {
 602                                 DEBUG(1,("%s: mic_blob.length[%u] for "
 603                                          "user=[%s] domain=[%s] workstation=[%s]\n",
 604                                          __func__,
 605                                          (unsigned)mic_blob.length,
 606                                          ntlmssp_state->user,
 607                                          ntlmssp_state->domain,
 608                                          ntlmssp_state->client.netbios_name));
 609                                 return NT_STATUS_INVALID_PARAMETER;
 610                         }
 611
 612                         if (request.length <
 613                             (NTLMSSP_MIC_OFFSET + NTLMSSP_MIC_SIZE))
 614                         {
 615                                 DEBUG(1,("%s: missing MIC "
 616                                          "request.length[%u] for "
 617                                          "user=[%s] domain=[%s] workstation=[%s]\n",
 618                                          __func__,
 619                                          (unsigned)request.length,
 620                                          ntlmssp_state->user,
 621                                          ntlmssp_state->domain,
 622                                          ntlmssp_state->client.netbios_name));
 623                                 return NT_STATUS_INVALID_PARAMETER;
 624                         }
 625
 626                         ntlmssp_state->new_spnego = true;
 627                 }
 628
 629                 count = ntlmssp_state->server.av_pair_list.count;
 630                 if (v2_resp.Challenge.AvPairs.count < count) {
 631                         return NT_STATUS_INVALID_PARAMETER;
 632                 }
 633
 634                 for (i = 0; i < count; i++) {
 635                         const struct AV_PAIR *sp =
 636                                 &ntlmssp_state->server.av_pair_list.pair[i];
 637                         const struct AV_PAIR *cp = NULL;
 638
 639                         if (sp->AvId == MsvAvEOL) {
 640                                 continue;
 641                         }
 642
 643                         cp = ndr_ntlmssp_find_av(&v2_resp.Challenge.AvPairs,
 644                                                  sp->AvId);
 645                         if (cp == NULL) {
 646                                 DEBUG(1,("%s: AvId 0x%x missing for"
 647                                          "user=[%s] domain=[%s] "
 648                                          "workstation=[%s]\n",
 649                                          __func__,
 650                                          (unsigned)sp->AvId,
 651                                          ntlmssp_state->user,
 652                                          ntlmssp_state->domain,
 653                                          ntlmssp_state->client.netbios_name));
 654                                 return NT_STATUS_INVALID_PARAMETER;
 655                         }
 656
 657                         switch (cp->AvId) {
 658 #define CASE_STRING(v) case Msv ## v: do { \
 659         int cmp; \
 660         if (sp->Value.v == NULL) { \
 661                 return NT_STATUS_INTERNAL_ERROR; \
 662         } \
 663         if (cp->Value.v == NULL) { \
 664                 DEBUG(1,("%s: invalid %s " \
 665                          "got[%s] expect[%s] for " \
 666                          "user=[%s] domain=[%s] workstation=[%s]\n", \
 667                          __func__, #v, \
 668                          cp->Value.v, \
 669                          sp->Value.v, \
 670                          ntlmssp_state->user, \
 671                          ntlmssp_state->domain, \
 672                          ntlmssp_state->client.netbios_name)); \
 673                 return NT_STATUS_INVALID_PARAMETER; \
 674         } \
 675         cmp = strcmp(cp->Value.v, sp->Value.v); \
 676         if (cmp != 0) { \
 677                 DEBUG(1,("%s: invalid %s " \
 678                          "got[%s] expect[%s] for " \
 679                          "user=[%s] domain=[%s] workstation=[%s]\n", \
 680                          __func__, #v, \
 681                          cp->Value.v, \
 682                          sp->Value.v, \
 683                          ntlmssp_state->user, \
 684                          ntlmssp_state->domain, \
 685                          ntlmssp_state->client.netbios_name)); \
 686                 return NT_STATUS_INVALID_PARAMETER; \
 687         } \
 688 } while(0); break
 689                         CASE_STRING(AvNbComputerName);
 690                         CASE_STRING(AvNbDomainName);
 691                         CASE_STRING(AvDnsComputerName);
 692                         CASE_STRING(AvDnsDomainName);
 693                         CASE_STRING(AvDnsTreeName);
 694                         case MsvAvTimestamp:
 695                                 if (cp->Value.AvTimestamp != sp->Value.AvTimestamp) {
 696                                         struct timeval ct;
 697                                         struct timeval st;
 698                                         struct timeval_buf tmp1;
 699                                         struct timeval_buf tmp2;
 700
 701                                         nttime_to_timeval(&ct,
 702                                                           cp->Value.AvTimestamp);
 703                                         nttime_to_timeval(&st,
 704                                                           sp->Value.AvTimestamp);
 705
 706                                         DEBUG(1,("%s: invalid AvTimestamp "
 707                                                  "got[%s] expect[%s] for "
 708                                                  "user=[%s] domain=[%s] "
 709                                                  "workstation=[%s]\n",
 710                                                  __func__,
 711                                                  timeval_str_buf(&ct, false,
 712                                                                  true, &tmp1),
 713                                                  timeval_str_buf(&st, false,
 714                                                                  true, &tmp2),
 715                                                  ntlmssp_state->user,
 716                                                  ntlmssp_state->domain,
 717                                                  ntlmssp_state->client.netbios_name));
 718                                         return NT_STATUS_INVALID_PARAMETER;
 719                                 }
 720                                 break;
 721                         default:
 722                                 /*
 723                                  * This can't happen as we control
 724                                  * ntlmssp_state->server.av_pair_list
 725                                  */
 726                                 return NT_STATUS_INTERNAL_ERROR;
 727                         }
 728                 }
 729         }
 730
 731         nttime_to_timeval(&endtime, ntlmssp_state->server.challenge_endtime);
 732         expired = timeval_expired(&endtime);
 733         if (expired) {
 734                 struct timeval_buf tmp;
 735                 DEBUG(1,("%s: challenge invalid (expired %s) for "
 736                          "user=[%s] domain=[%s] workstation=[%s]\n",
 737                          __func__,
 738                          timeval_str_buf(&endtime, false, true, &tmp),
 739                          ntlmssp_state->user, ntlmssp_state->domain,
 740                          ntlmssp_state->client.netbios_name));
 741                 return NT_STATUS_INVALID_PARAMETER;
 742         }
 743
 744         /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
 745            client challenge
 746
 747            However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
 748         */
 749         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 750                 if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
 751                         MD5_CTX md5_session_nonce_ctx;
 752                         state->doing_ntlm2 = true;
 753
 754                         memcpy(state->session_nonce, ntlmssp_state->internal_chal.data, 8);
 755                         memcpy(&state->session_nonce[8], ntlmssp_state->lm_resp.data, 8);
 756
 757                         SMB_ASSERT(ntlmssp_state->internal_chal.data && ntlmssp_state->internal_chal.length == 8);
 758
 759                         MD5Init(&md5_session_nonce_ctx);
 760                         MD5Update(&md5_session_nonce_ctx, state->session_nonce, 16);
 761                         MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
 762
 763                         /* LM response is no longer useful */
 764                         data_blob_free(&ntlmssp_state->lm_resp);
 765
 766                         /* We changed the effective challenge - set it */
 767                         if (auth_context->set_ntlm_challenge) {
 768                                 nt_status = auth_context->set_ntlm_challenge(auth_context,
 769                                                                              session_nonce_hash,
 770                                                                              "NTLMSSP callback (NTLM2)");
 771                                 if (!NT_STATUS_IS_OK(nt_status)) {
 772                                         DEBUG(1, ("gensec_ntlmssp_server_negotiate: failed to get challenge: %s\n",
 773                                                   nt_errstr(nt_status)));
 774                                         return nt_status;
 775                                 }
 776                         } else {
 777                                 DEBUG(1, ("gensec_ntlmssp_server_negotiate: backend doesn't have facility for challenge to be set\n"));
 778
 779                                 return NT_STATUS_NOT_IMPLEMENTED;
 780                         }
 781
 782                         /* LM Key is incompatible. */
 783                         ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 784                 }
 785         }
 786
 787         user_info = talloc_zero(state, struct auth_usersupplied_info);
 788         if (!user_info) {
 789                 return NT_STATUS_NO_MEMORY;
 790         }
 791
 792         user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
 793         user_info->flags = 0;
 794         user_info->mapped_state = false;
 795         user_info->client.account_name = ntlmssp_state->user;
 796         user_info->client.domain_name = ntlmssp_state->domain;
 797         user_info->workstation_name = ntlmssp_state->client.netbios_name;
 798         user_info->remote_host = gensec_get_remote_address(gensec_security);
 799         user_info->local_host = gensec_get_local_address(gensec_security);
 800         user_info->service_description
 801                 = gensec_get_target_service_description(gensec_security);
 802
 803         /*
 804          * This will just be the string "NTLMSSP" from
 805          * gensec_ntlmssp_final_auth_type, but ensures it stays in sync
 806          * with the same use in the authorization logging triggered by
 807          * gensec_session_info() later
 808          */
 809         user_info->auth_description = gensec_final_auth_type(gensec_security);
 810
 811         user_info->password_state = AUTH_PASSWORD_RESPONSE;
 812         user_info->password.response.lanman = ntlmssp_state->lm_resp;
 813         user_info->password.response.nt = ntlmssp_state->nt_resp;
 814
 815         state->user_info = user_info;
 816         return NT_STATUS_OK;
 817 }
 818
 819 static void ntlmssp_server_auth_done(struct tevent_req *subreq)
 820 {
 821         struct tevent_req *req =
 822                 tevent_req_callback_data(subreq,
 823                 struct tevent_req);
 824         struct ntlmssp_server_auth_state *state =
 825                 tevent_req_data(req,
 826                 struct ntlmssp_server_auth_state);
 827         struct gensec_security *gensec_security = state->gensec_security;
 828         struct gensec_ntlmssp_context *gensec_ntlmssp = state->gensec_ntlmssp;
 829         struct auth4_context *auth_context = gensec_security->auth_context;
 830         uint8_t authoritative = 0;
 831         NTSTATUS status;
 832
 833         status = auth_context->check_ntlm_password_recv(subreq,
 834                                                 gensec_ntlmssp,
 835                                                 &authoritative,
 836                                                 &gensec_ntlmssp->server_returned_info,
 837                                                 &state->user_session_key,
 838                                                 &state->lm_session_key);
 839         TALLOC_FREE(subreq);
 840         if (!NT_STATUS_IS_OK(status)) {
 841                 DBG_INFO("Checking NTLMSSP password for %s\\%s failed: %s\n",
 842                          state->user_info->client.domain_name,
 843                          state->user_info->client.account_name,
 844                          nt_errstr(status));
 845         }
 846         if (tevent_req_nterror(req, status)) {
 847                 return;
 848         }
 849         talloc_steal(state, state->user_session_key.data);
 850         talloc_steal(state, state->lm_session_key.data);
 851
 852         status = ntlmssp_server_postauth(state->gensec_security,
 853                                          state->gensec_ntlmssp,
 854                                          state, state->in);
 855         if (tevent_req_nterror(req, status)) {
 856                 return;
 857         }
 858
 859         tevent_req_done(req);
 860 }
 861
 862 /**
 863  * Next state function for the Authenticate packet
 864  * (after authentication - figures out the session keys etc)
 865  *
 866  * @param ntlmssp_state NTLMSSP State
 867  * @return Errors or NT_STATUS_OK.
 868  */
 869
 870 static NTSTATUS ntlmssp_server_postauth(struct gensec_security *gensec_security,
 871                                         struct gensec_ntlmssp_context *gensec_ntlmssp,
 872                                         struct ntlmssp_server_auth_state *state,
 873                                         DATA_BLOB request)
 874 {
 875         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
 876         struct auth4_context *auth_context = gensec_security->auth_context;
 877         DATA_BLOB user_session_key = state->user_session_key;
 878         DATA_BLOB lm_session_key = state->lm_session_key;
 879         NTSTATUS nt_status = NT_STATUS_OK;
 880         DATA_BLOB session_key = data_blob(NULL, 0);
 881         struct auth_session_info *session_info = NULL;
 882
 883         TALLOC_FREE(state->user_info);
 884
 885         if (lpcfg_map_to_guest(gensec_security->settings->lp_ctx) != NEVER_MAP_TO_GUEST
 886             && auth_context->generate_session_info != NULL)
 887         {
 888                 NTSTATUS tmp_status;
 889
 890                 /*
 891                  * We need to check if the auth is anonymous or mapped to guest
 892                  */
 893                 tmp_status = auth_context->generate_session_info(auth_context, state,
 894                                                                  gensec_ntlmssp->server_returned_info,
 895                                                                  gensec_ntlmssp->ntlmssp_state->user,
 896                                                                  AUTH_SESSION_INFO_SIMPLE_PRIVILEGES,
 897                                                                  &session_info);
 898                 if (!NT_STATUS_IS_OK(tmp_status)) {
 899                         /*
 900                          * We don't care about failures,
 901                          * the worst result is that we try MIC checking
 902                          * for a map to guest authentication.
 903                          */
 904                         TALLOC_FREE(session_info);
 905                 }
 906         }
 907
 908         if (session_info != NULL) {
 909                 if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
 910                         /*
 911                          * Anonymous and GUEST are not secure anyway.
 912                          * avoid new_spnego and MIC checking.
 913                          */
 914                         ntlmssp_state->new_spnego = false;
 915                         ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SIGN;
 916                         ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SEAL;
 917                 }
 918                 TALLOC_FREE(session_info);
 919         }
 920
 921         dump_data_pw("NT session key:\n", user_session_key.data, user_session_key.length);
 922         dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length);
 923
 924         /* Handle the different session key derivation for NTLM2 */
 925         if (state->doing_ntlm2) {
 926                 if (user_session_key.data && user_session_key.length == 16) {
 927                         session_key = data_blob_talloc(ntlmssp_state,
 928                                                        NULL, 16);
 929                         hmac_md5(user_session_key.data, state->session_nonce,
 930                                  sizeof(state->session_nonce), session_key.data);
 931                         DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
 932                         dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
 933
 934                 } else {
 935                         DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
 936                         session_key = data_blob_null;
 937                 }
 938         } else if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
 939                 /* Ensure we can never get here on NTLMv2 */
 940                 && (ntlmssp_state->nt_resp.length == 0 || ntlmssp_state->nt_resp.length == 24)) {
 941
 942                 if (lm_session_key.data && lm_session_key.length >= 8) {
 943                         if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
 944                                 session_key = data_blob_talloc(ntlmssp_state,
 945                                                                NULL, 16);
 946                                 if (session_key.data == NULL) {
 947                                         return NT_STATUS_NO_MEMORY;
 948                                 }
 949                                 SMBsesskeygen_lm_sess_key(lm_session_key.data, ntlmssp_state->lm_resp.data,
 950                                                           session_key.data);
 951                                 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
 952                         } else {
 953                                 static const uint8_t zeros[24] = {0, };
 954                                 session_key = data_blob_talloc(
 955                                         ntlmssp_state, NULL, 16);
 956                                 if (session_key.data == NULL) {
 957                                         return NT_STATUS_NO_MEMORY;
 958                                 }
 959                                 SMBsesskeygen_lm_sess_key(zeros, zeros,
 960                                                           session_key.data);
 961                                 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
 962                         }
 963                         dump_data_pw("LM session key:\n", session_key.data,
 964                                      session_key.length);
 965                 } else {
 966                         /* LM Key not selected */
 967                         ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 968
 969                         DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
 970                         session_key = data_blob_null;
 971                 }
 972
 973         } else if (user_session_key.data) {
 974                 session_key = user_session_key;
 975                 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
 976                 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
 977
 978                 /* LM Key not selected */
 979                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 980
 981         } else if (lm_session_key.data) {
 982                 /* Very weird to have LM key, but no user session key, but anyway.. */
 983                 session_key = lm_session_key;
 984                 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
 985                 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
 986
 987                 /* LM Key not selected */
 988                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 989
 990         } else {
 991                 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
 992                 session_key = data_blob_null;
 993
 994                 /* LM Key not selected */
 995                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 996         }
 997
 998         /* With KEY_EXCH, the client supplies the proposed session key,
 999            but encrypts it with the long-term key */
1000         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
1001                 if (!state->encrypted_session_key.data
1002                     || state->encrypted_session_key.length != 16) {
1003                         DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
1004                                   (unsigned)state->encrypted_session_key.length));
1005                         return NT_STATUS_INVALID_PARAMETER;
1006                 } else if (!session_key.data || session_key.length != 16) {
1007                         DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
1008                                   (unsigned int)session_key.length));
1009                         ntlmssp_state->session_key = session_key;
1010                         talloc_steal(ntlmssp_state, session_key.data);
1011                 } else {
1012                         dump_data_pw("KEY_EXCH session key (enc):\n",
1013                                      state->encrypted_session_key.data,
1014                                      state->encrypted_session_key.length);
1015                         arcfour_crypt(state->encrypted_session_key.data,
1016                                       session_key.data,
1017                                       state->encrypted_session_key.length);
1018                         ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state,
1019                                                                       state->encrypted_session_key.data,
1020                                                                       state->encrypted_session_key.length);
1021                         dump_data_pw("KEY_EXCH session key:\n",
1022                                      state->encrypted_session_key.data,
1023                                      state->encrypted_session_key.length);
1024                 }
1025         } else {
1026                 ntlmssp_state->session_key = session_key;
1027                 talloc_steal(ntlmssp_state, session_key.data);
1028         }
1029
1030         if (ntlmssp_state->new_spnego) {
1031                 HMACMD5Context ctx;
1032                 uint8_t mic_buffer[NTLMSSP_MIC_SIZE] = { 0, };
1033                 int cmp;
1034
1035                 hmac_md5_init_limK_to_64(ntlmssp_state->session_key.data,
1036                                          ntlmssp_state->session_key.length,
1037                                          &ctx);
1038
1039                 hmac_md5_update(ntlmssp_state->negotiate_blob.data,
1040                                 ntlmssp_state->negotiate_blob.length,
1041                                 &ctx);
1042                 hmac_md5_update(ntlmssp_state->challenge_blob.data,
1043                                 ntlmssp_state->challenge_blob.length,
1044                                 &ctx);
1045
1046                 /* checked were we set ntlmssp_state->new_spnego */
1047                 SMB_ASSERT(request.length >
1048                            (NTLMSSP_MIC_OFFSET + NTLMSSP_MIC_SIZE));
1049
1050                 hmac_md5_update(request.data, NTLMSSP_MIC_OFFSET, &ctx);
1051                 hmac_md5_update(mic_buffer, NTLMSSP_MIC_SIZE, &ctx);
1052                 hmac_md5_update(request.data +
1053                                 (NTLMSSP_MIC_OFFSET + NTLMSSP_MIC_SIZE),
1054                                 request.length -
1055                                 (NTLMSSP_MIC_OFFSET + NTLMSSP_MIC_SIZE),
1056                                 &ctx);
1057                 hmac_md5_final(mic_buffer, &ctx);
1058
1059                 cmp = memcmp(request.data + NTLMSSP_MIC_OFFSET,
1060                              mic_buffer, NTLMSSP_MIC_SIZE);
1061                 if (cmp != 0) {
1062                         DEBUG(1,("%s: invalid NTLMSSP_MIC for "
1063                                  "user=[%s] domain=[%s] workstation=[%s]\n",
1064                                  __func__,
1065                                  ntlmssp_state->user,
1066                                  ntlmssp_state->domain,
1067                                  ntlmssp_state->client.netbios_name));
1068                         dump_data(1, request.data + NTLMSSP_MIC_OFFSET,
1069                                   NTLMSSP_MIC_SIZE);
1070                         dump_data(1, mic_buffer,
1071                                   NTLMSSP_MIC_SIZE);
1072                         return NT_STATUS_INVALID_PARAMETER;
1073                 }
1074         }
1075
1076         data_blob_free(&ntlmssp_state->negotiate_blob);
1077         data_blob_free(&ntlmssp_state->challenge_blob);
1078
1079         if (gensec_ntlmssp_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
1080                 nt_status = ntlmssp_sign_init(ntlmssp_state);
1081         }
1082
1083         data_blob_clear_free(&ntlmssp_state->internal_chal);
1084         data_blob_clear_free(&ntlmssp_state->chal);
1085         data_blob_clear_free(&ntlmssp_state->lm_resp);
1086         data_blob_clear_free(&ntlmssp_state->nt_resp);
1087
1088         ntlmssp_state->expected_state = NTLMSSP_DONE;
1089
1090         return nt_status;
1091 }
1092
1093 NTSTATUS ntlmssp_server_auth_recv(struct tevent_req *req,
1094                                   TALLOC_CTX *out_mem_ctx,
1095                                   DATA_BLOB *out)
1096 {
1097         NTSTATUS status;
1098
1099         *out = data_blob_null;
1100
1101         if (tevent_req_is_nterror(req, &status)) {
1102                 tevent_req_received(req);
1103                 return status;
1104         }
1105
1106         tevent_req_received(req);
1107         return NT_STATUS_OK;
1108 }