source3/libsmb/ntlmssp.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    handle NLTMSSP, server side
   5
   6    Copyright (C) Andrew Tridgell      2001
   7    Copyright (C) Andrew Bartlett 2001-2003
   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 2 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, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
  27                                        DATA_BLOB reply, DATA_BLOB *next_request);
  28 static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
  29                                          const DATA_BLOB in, DATA_BLOB *out);
  30 static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
  31                                          const DATA_BLOB reply, DATA_BLOB *next_request);
  32 static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
  33                                     const DATA_BLOB request, DATA_BLOB *reply);
  34
  35 /**
  36  * Callbacks for NTLMSSP - for both client and server operating modes
  37  *
  38  */
  39
  40 static const struct ntlmssp_callbacks {
  41         enum NTLMSSP_ROLE role;
  42         enum NTLM_MESSAGE_TYPE ntlmssp_command;
  43         NTSTATUS (*fn)(struct ntlmssp_state *ntlmssp_state,
  44                        DATA_BLOB in, DATA_BLOB *out);
  45 } ntlmssp_callbacks[] = {
  46         {NTLMSSP_CLIENT, NTLMSSP_INITIAL, ntlmssp_client_initial},
  47         {NTLMSSP_SERVER, NTLMSSP_NEGOTIATE, ntlmssp_server_negotiate},
  48         {NTLMSSP_CLIENT, NTLMSSP_CHALLENGE, ntlmssp_client_challenge},
  49         {NTLMSSP_SERVER, NTLMSSP_AUTH, ntlmssp_server_auth},
  50         {NTLMSSP_CLIENT, NTLMSSP_UNKNOWN, NULL},
  51         {NTLMSSP_SERVER, NTLMSSP_UNKNOWN, NULL}
  52 };
  53
  54
  55 /**
  56  * Print out the NTLMSSP flags for debugging
  57  * @param neg_flags The flags from the packet
  58  */
  59
  60 void debug_ntlmssp_flags(uint32 neg_flags)
  61 {
  62         DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
  63
  64         if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE)
  65                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_UNICODE\n"));
  66         if (neg_flags & NTLMSSP_NEGOTIATE_OEM)
  67                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_OEM\n"));
  68         if (neg_flags & NTLMSSP_REQUEST_TARGET)
  69                 DEBUGADD(4, ("  NTLMSSP_REQUEST_TARGET\n"));
  70         if (neg_flags & NTLMSSP_NEGOTIATE_SIGN)
  71                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_SIGN\n"));
  72         if (neg_flags & NTLMSSP_NEGOTIATE_SEAL)
  73                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_SEAL\n"));
  74         if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
  75                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_LM_KEY\n"));
  76         if (neg_flags & NTLMSSP_NEGOTIATE_NETWARE)
  77                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NETWARE\n"));
  78         if (neg_flags & NTLMSSP_NEGOTIATE_NTLM)
  79                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NTLM\n"));
  80         if (neg_flags & NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED)
  81                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED\n"));
  82         if (neg_flags & NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED)
  83                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_WORKSTATION_SUPPLIED\n"));
  84         if (neg_flags & NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL)
  85                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL\n"));
  86         if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)
  87                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_ALWAYS_SIGN\n"));
  88         if (neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
  89                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NTLM2\n"));
  90         if (neg_flags & NTLMSSP_CHAL_TARGET_INFO)
  91                 DEBUGADD(4, ("  NTLMSSP_CHAL_TARGET_INFO\n"));
  92         if (neg_flags & NTLMSSP_NEGOTIATE_128)
  93                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_128\n"));
  94         if (neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)
  95                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_KEY_EXCH\n"));
  96 }
  97
  98 /**
  99  * Default challenge generation code.
 100  *
 101  */
 102
 103 static const uint8 *get_challenge(const struct ntlmssp_state *ntlmssp_state)
 104 {
 105         static uchar chal[8];
 106         generate_random_buffer(chal, sizeof(chal), False);
 107
 108         return chal;
 109 }
 110
 111 /**
 112  * Default 'we can set the challenge to anything we like' implementation
 113  *
 114  */
 115
 116 static BOOL may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
 117 {
 118         return True;
 119 }
 120
 121 /**
 122  * Default 'we can set the challenge to anything we like' implementation
 123  *
 124  * Does not actually do anything, as the value is always in the structure anyway.
 125  *
 126  */
 127
 128 static NTSTATUS set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
 129 {
 130         SMB_ASSERT(challenge->length == 8);
 131         return NT_STATUS_OK;
 132 }
 133
 134 /**
 135  * Set a username on an NTLMSSP context - ensures it is talloc()ed
 136  *
 137  */
 138
 139 NTSTATUS ntlmssp_set_username(NTLMSSP_STATE *ntlmssp_state, const char *user)
 140 {
 141         ntlmssp_state->user = talloc_strdup(ntlmssp_state->mem_ctx, user);
 142         if (!ntlmssp_state->user) {
 143                 return NT_STATUS_NO_MEMORY;
 144         }
 145         return NT_STATUS_OK;
 146 }
 147
 148 /**
 149  * Set a password on an NTLMSSP context - ensures it is talloc()ed
 150  *
 151  */
 152 NTSTATUS ntlmssp_set_password(NTLMSSP_STATE *ntlmssp_state, const char *password)
 153 {
 154         if (!password) {
 155                 ntlmssp_state->password = NULL;
 156         } else {
 157                 ntlmssp_state->password = talloc_strdup(ntlmssp_state->mem_ctx, password);
 158                 if (!ntlmssp_state->password) {
 159                         return NT_STATUS_NO_MEMORY;
 160                 }
 161         }
 162         return NT_STATUS_OK;
 163 }
 164
 165 /**
 166  * Set a domain on an NTLMSSP context - ensures it is talloc()ed
 167  *
 168  */
 169 NTSTATUS ntlmssp_set_domain(NTLMSSP_STATE *ntlmssp_state, const char *domain)
 170 {
 171         /* Possibly make our NTLMv2 client more robust by always having
 172            an uppercase domain */
 173         ntlmssp_state->domain = talloc_strdup_upper(ntlmssp_state->mem_ctx, domain);
 174         if (!ntlmssp_state->domain) {
 175                 return NT_STATUS_NO_MEMORY;
 176         }
 177         return NT_STATUS_OK;
 178 }
 179
 180 /**
 181  * Set a workstation on an NTLMSSP context - ensures it is talloc()ed
 182  *
 183  */
 184 NTSTATUS ntlmssp_set_workstation(NTLMSSP_STATE *ntlmssp_state, const char *workstation)
 185 {
 186         ntlmssp_state->workstation = talloc_strdup(ntlmssp_state->mem_ctx, workstation);
 187         if (!ntlmssp_state->domain) {
 188                 return NT_STATUS_NO_MEMORY;
 189         }
 190         return NT_STATUS_OK;
 191 }
 192
 193 /**
 194  *  Store a DATA_BLOB containing an NTLMSSP response, for use later.
 195  *  This copies the data blob
 196  */
 197
 198 NTSTATUS ntlmssp_store_response(NTLMSSP_STATE *ntlmssp_state,
 199                                 DATA_BLOB response)
 200 {
 201         ntlmssp_state->stored_response = data_blob_talloc(ntlmssp_state->mem_ctx,
 202                                                           response.data, response.length);
 203         return NT_STATUS_OK;
 204 }
 205
 206 /**
 207  * Next state function for the NTLMSSP state machine
 208  *
 209  * @param ntlmssp_state NTLMSSP State
 210  * @param in The packet in from the NTLMSSP partner, as a DATA_BLOB
 211  * @param out The reply, as an allocated DATA_BLOB, caller to free.
 212  * @return Errors, NT_STATUS_MORE_PROCESSING_REQUIRED or NT_STATUS_OK.
 213  */
 214
 215 NTSTATUS ntlmssp_update(NTLMSSP_STATE *ntlmssp_state,
 216                         const DATA_BLOB in, DATA_BLOB *out)
 217 {
 218         DATA_BLOB input;
 219         uint32 ntlmssp_command;
 220         int i;
 221
 222         *out = data_blob(NULL, 0);
 223
 224         if (!in.length && ntlmssp_state->stored_response.length) {
 225                 input = ntlmssp_state->stored_response;
 226
 227                 /* we only want to read the stored response once - overwrite it */
 228                 ntlmssp_state->stored_response = data_blob(NULL, 0);
 229         } else {
 230                 input = in;
 231         }
 232
 233         if (!input.length) {
 234                 switch (ntlmssp_state->role) {
 235                 case NTLMSSP_CLIENT:
 236                         ntlmssp_command = NTLMSSP_INITIAL;
 237                         break;
 238                 case NTLMSSP_SERVER:
 239                         /* 'datagram' mode - no neg packet */
 240                         ntlmssp_command = NTLMSSP_NEGOTIATE;
 241                         break;
 242                 }
 243         } else {
 244                 if (!msrpc_parse(&input, "Cd",
 245                                  "NTLMSSP",
 246                                  &ntlmssp_command)) {
 247                         DEBUG(1, ("Failed to parse NTLMSSP packet, could not extract NTLMSSP command\n"));
 248                         dump_data(2, (const char *)input.data, input.length);
 249                         return NT_STATUS_INVALID_PARAMETER;
 250                 }
 251         }
 252
 253         if (ntlmssp_command != ntlmssp_state->expected_state) {
 254                 DEBUG(1, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command, ntlmssp_state->expected_state));
 255                 return NT_STATUS_INVALID_PARAMETER;
 256         }
 257
 258         for (i=0; ntlmssp_callbacks[i].fn; i++) {
 259                 if (ntlmssp_callbacks[i].role == ntlmssp_state->role
 260                     && ntlmssp_callbacks[i].ntlmssp_command == ntlmssp_command) {
 261                         return ntlmssp_callbacks[i].fn(ntlmssp_state, input, out);
 262                 }
 263         }
 264
 265         DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
 266                   ntlmssp_state->role, ntlmssp_command));
 267
 268         return NT_STATUS_INVALID_PARAMETER;
 269 }
 270
 271 /**
 272  * End an NTLMSSP state machine
 273  *
 274  * @param ntlmssp_state NTLMSSP State, free()ed by this function
 275  */
 276
 277 void ntlmssp_end(NTLMSSP_STATE **ntlmssp_state)
 278 {
 279         TALLOC_CTX *mem_ctx = (*ntlmssp_state)->mem_ctx;
 280
 281         (*ntlmssp_state)->ref_count--;
 282
 283         if ((*ntlmssp_state)->ref_count == 0) {
 284                 data_blob_free(&(*ntlmssp_state)->chal);
 285                 data_blob_free(&(*ntlmssp_state)->lm_resp);
 286                 data_blob_free(&(*ntlmssp_state)->nt_resp);
 287
 288                 talloc_destroy(mem_ctx);
 289         }
 290
 291         *ntlmssp_state = NULL;
 292         return;
 293 }
 294
 295 /**
 296  * Determine correct target name flags for reply, given server role
 297  * and negotiated flags
 298  *
 299  * @param ntlmssp_state NTLMSSP State
 300  * @param neg_flags The flags from the packet
 301  * @param chal_flags The flags to be set in the reply packet
 302  * @return The 'target name' string.
 303  */
 304
 305 static const char *ntlmssp_target_name(struct ntlmssp_state *ntlmssp_state,
 306                                        uint32 neg_flags, uint32 *chal_flags)
 307 {
 308         if (neg_flags & NTLMSSP_REQUEST_TARGET) {
 309                 *chal_flags |= NTLMSSP_CHAL_TARGET_INFO;
 310                 *chal_flags |= NTLMSSP_REQUEST_TARGET;
 311                 if (ntlmssp_state->server_role == ROLE_STANDALONE) {
 312                         *chal_flags |= NTLMSSP_TARGET_TYPE_SERVER;
 313                         return ntlmssp_state->get_global_myname();
 314                 } else {
 315                         *chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN;
 316                         return ntlmssp_state->get_domain();
 317                 };
 318         } else {
 319                 return "";
 320         }
 321 }
 322
 323 static void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
 324                                       uint32 neg_flags, BOOL allow_lm) {
 325         if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
 326                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
 327                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
 328                 ntlmssp_state->unicode = True;
 329         } else {
 330                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
 331                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
 332                 ntlmssp_state->unicode = False;
 333         }
 334
 335         if ((neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) && allow_lm) {
 336                 /* other end forcing us to use LM */
 337                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
 338                 ntlmssp_state->use_ntlmv2 = False;
 339         } else {
 340                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 341         }
 342
 343         if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN) {
 344                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
 345         }
 346
 347         if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
 348                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 349         }
 350
 351         if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) {
 352                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
 353         }
 354
 355         if (!(neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
 356                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
 357         }
 358
 359         if ((neg_flags & NTLMSSP_REQUEST_TARGET)) {
 360                 ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
 361         }
 362
 363 }
 364
 365
 366 /**
 367  * Next state function for the Negotiate packet
 368  *
 369  * @param ntlmssp_state NTLMSSP State
 370  * @param request The request, as a DATA_BLOB
 371  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 372  * @return Errors or MORE_PROCESSING_REQUIRED if a reply is sent.
 373  */
 374
 375 static NTSTATUS ntlmssp_server_negotiate(struct ntlmssp_state *ntlmssp_state,
 376                                          const DATA_BLOB request, DATA_BLOB *reply)
 377 {
 378         DATA_BLOB struct_blob;
 379         fstring dnsname, dnsdomname;
 380         uint32 neg_flags = 0;
 381         uint32 ntlmssp_command, chal_flags;
 382         char *cliname=NULL, *domname=NULL;
 383         const uint8 *cryptkey;
 384         const char *target_name;
 385
 386         /* parse the NTLMSSP packet */
 387 #if 0
 388         file_save("ntlmssp_negotiate.dat", request.data, request.length);
 389 #endif
 390
 391         if (request.length) {
 392                 if (!msrpc_parse(&request, "CddAA",
 393                                  "NTLMSSP",
 394                                  &ntlmssp_command,
 395                                  &neg_flags,
 396                                  &cliname,
 397                                  &domname)) {
 398                         DEBUG(1, ("ntlmssp_server_negotiate: failed to parse NTLMSSP:\n"));
 399                         dump_data(2, (const char *)request.data, request.length);
 400                         return NT_STATUS_INVALID_PARAMETER;
 401                 }
 402
 403                 SAFE_FREE(cliname);
 404                 SAFE_FREE(domname);
 405
 406                 debug_ntlmssp_flags(neg_flags);
 407         }
 408
 409         ntlmssp_handle_neg_flags(ntlmssp_state, neg_flags, lp_lanman_auth());
 410
 411         /* Ask our caller what challenge they would like in the packet */
 412         cryptkey = ntlmssp_state->get_challenge(ntlmssp_state);
 413
 414         /* Check if we may set the challenge */
 415         if (!ntlmssp_state->may_set_challenge(ntlmssp_state)) {
 416                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 417         }
 418
 419         /* The flags we send back are not just the negotiated flags,
 420          * they are also 'what is in this packet'.  Therfore, we
 421          * operate on 'chal_flags' from here on
 422          */
 423
 424         chal_flags = ntlmssp_state->neg_flags;
 425
 426         /* get the right name to fill in as 'target' */
 427         target_name = ntlmssp_target_name(ntlmssp_state,
 428                                           neg_flags, &chal_flags);
 429         if (target_name == NULL)
 430                 return NT_STATUS_INVALID_PARAMETER;
 431
 432         ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8);
 433         ntlmssp_state->internal_chal = data_blob_talloc(ntlmssp_state->mem_ctx, cryptkey, 8);
 434
 435
 436         /* This should be a 'netbios domain -> DNS domain' mapping */
 437         dnsdomname[0] = '\0';
 438         get_mydnsdomname(dnsdomname);
 439         strlower_m(dnsdomname);
 440
 441         dnsname[0] = '\0';
 442         get_mydnsfullname(dnsname);
 443
 444         /* This creates the 'blob' of names that appears at the end of the packet */
 445         if (chal_flags & NTLMSSP_CHAL_TARGET_INFO)
 446         {
 447                 const char *target_name_dns = "";
 448                 if (chal_flags |= NTLMSSP_TARGET_TYPE_DOMAIN) {
 449                         target_name_dns = dnsdomname;
 450                 } else if (chal_flags |= NTLMSSP_TARGET_TYPE_SERVER) {
 451                         target_name_dns = dnsname;
 452                 }
 453
 454                 msrpc_gen(&struct_blob, "aaaaa",
 455                           NTLMSSP_NAME_TYPE_DOMAIN, target_name,
 456                           NTLMSSP_NAME_TYPE_SERVER, ntlmssp_state->get_global_myname(),
 457                           NTLMSSP_NAME_TYPE_DOMAIN_DNS, dnsdomname,
 458                           NTLMSSP_NAME_TYPE_SERVER_DNS, dnsname,
 459                           0, "");
 460         } else {
 461                 struct_blob = data_blob(NULL, 0);
 462         }
 463
 464         {
 465                 /* Marshel the packet in the right format, be it unicode or ASCII */
 466                 const char *gen_string;
 467                 if (ntlmssp_state->unicode) {
 468                         gen_string = "CdUdbddB";
 469                 } else {
 470                         gen_string = "CdAdbddB";
 471                 }
 472
 473                 msrpc_gen(reply, gen_string,
 474                           "NTLMSSP",
 475                           NTLMSSP_CHALLENGE,
 476                           target_name,
 477                           chal_flags,
 478                           cryptkey, 8,
 479                           0, 0,
 480                           struct_blob.data, struct_blob.length);
 481         }
 482
 483         data_blob_free(&struct_blob);
 484
 485         ntlmssp_state->expected_state = NTLMSSP_AUTH;
 486
 487         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 488 }
 489
 490 /**
 491  * Next state function for the Authenticate packet
 492  *
 493  * @param ntlmssp_state NTLMSSP State
 494  * @param request The request, as a DATA_BLOB
 495  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 496  * @return Errors or NT_STATUS_OK.
 497  */
 498
 499 static NTSTATUS ntlmssp_server_auth(struct ntlmssp_state *ntlmssp_state,
 500                                     const DATA_BLOB request, DATA_BLOB *reply)
 501 {
 502         DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
 503         DATA_BLOB nt_session_key = data_blob(NULL, 0);
 504         DATA_BLOB lm_session_key = data_blob(NULL, 0);
 505         DATA_BLOB session_key = data_blob(NULL, 0);
 506         uint32 ntlmssp_command, auth_flags;
 507         NTSTATUS nt_status;
 508
 509         /* used by NTLM2 */
 510         BOOL doing_ntlm2 = False;
 511
 512         uchar session_nonce[16];
 513         uchar session_nonce_hash[16];
 514
 515         const char *parse_string;
 516         char *domain = NULL;
 517         char *user = NULL;
 518         char *workstation = NULL;
 519
 520         /* parse the NTLMSSP packet */
 521         *reply = data_blob(NULL, 0);
 522
 523 #if 0
 524         file_save("ntlmssp_auth.dat", request.data, request.length);
 525 #endif
 526
 527         if (ntlmssp_state->unicode) {
 528                 parse_string = "CdBBUUUBd";
 529         } else {
 530                 parse_string = "CdBBAAABd";
 531         }
 532
 533         data_blob_free(&ntlmssp_state->lm_resp);
 534         data_blob_free(&ntlmssp_state->nt_resp);
 535
 536         ntlmssp_state->user = NULL;
 537         ntlmssp_state->domain = NULL;
 538         ntlmssp_state->workstation = NULL;
 539
 540         /* now the NTLMSSP encoded auth hashes */
 541         if (!msrpc_parse(&request, parse_string,
 542                          "NTLMSSP",
 543                          &ntlmssp_command,
 544                          &ntlmssp_state->lm_resp,
 545                          &ntlmssp_state->nt_resp,
 546                          &domain,
 547                          &user,
 548                          &workstation,
 549                          &encrypted_session_key,
 550                          &auth_flags)) {
 551                 DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
 552                 dump_data(2, (const char *)request.data, request.length);
 553                 SAFE_FREE(domain);
 554                 SAFE_FREE(user);
 555                 SAFE_FREE(workstation);
 556                 data_blob_free(&encrypted_session_key);
 557                 auth_flags = 0;
 558
 559                 /* Try again with a shorter string (Win9X truncates this packet) */
 560                 if (ntlmssp_state->unicode) {
 561                         parse_string = "CdBBUUU";
 562                 } else {
 563                         parse_string = "CdBBAAA";
 564                 }
 565
 566                 /* now the NTLMSSP encoded auth hashes */
 567                 if (!msrpc_parse(&request, parse_string,
 568                                  "NTLMSSP",
 569                                  &ntlmssp_command,
 570                                  &ntlmssp_state->lm_resp,
 571                                  &ntlmssp_state->nt_resp,
 572                                  &domain,
 573                                  &user,
 574                                  &workstation)) {
 575                         DEBUG(1, ("ntlmssp_server_auth: failed to parse NTLMSSP:\n"));
 576                         dump_data(2, (const char *)request.data, request.length);
 577                         SAFE_FREE(domain);
 578                         SAFE_FREE(user);
 579                         SAFE_FREE(workstation);
 580
 581                         return NT_STATUS_INVALID_PARAMETER;
 582                 }
 583         }
 584
 585         if (auth_flags)
 586                 ntlmssp_handle_neg_flags(ntlmssp_state, auth_flags, lp_lanman_auth());
 587
 588         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_domain(ntlmssp_state, domain))) {
 589                 SAFE_FREE(domain);
 590                 SAFE_FREE(user);
 591                 SAFE_FREE(workstation);
 592                 data_blob_free(&encrypted_session_key);
 593                 return nt_status;
 594         }
 595
 596         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_username(ntlmssp_state, user))) {
 597                 SAFE_FREE(domain);
 598                 SAFE_FREE(user);
 599                 SAFE_FREE(workstation);
 600                 data_blob_free(&encrypted_session_key);
 601                 return nt_status;
 602         }
 603
 604         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_set_workstation(ntlmssp_state, workstation))) {
 605                 SAFE_FREE(domain);
 606                 SAFE_FREE(user);
 607                 SAFE_FREE(workstation);
 608                 data_blob_free(&encrypted_session_key);
 609                 return nt_status;
 610         }
 611
 612         SAFE_FREE(domain);
 613         SAFE_FREE(user);
 614         SAFE_FREE(workstation);
 615
 616         DEBUG(3,("Got user=[%s] domain=[%s] workstation=[%s] len1=%lu len2=%lu\n",
 617                  ntlmssp_state->user, ntlmssp_state->domain, ntlmssp_state->workstation, (unsigned long)ntlmssp_state->lm_resp.length, (unsigned long)ntlmssp_state->nt_resp.length));
 618
 619 #if 0
 620         file_save("nthash1.dat",  &ntlmssp_state->nt_resp.data,  &ntlmssp_state->nt_resp.length);
 621         file_save("lmhash1.dat",  &ntlmssp_state->lm_resp.data,  &ntlmssp_state->lm_resp.length);
 622 #endif
 623
 624         /* NTLM2 uses a 'challenge' that is made of up both the server challenge, and a
 625            client challenge
 626
 627            However, the NTLM2 flag may still be set for the real NTLMv2 logins, be careful.
 628         */
 629         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 630                 if (ntlmssp_state->nt_resp.length == 24 && ntlmssp_state->lm_resp.length == 24) {
 631                         struct MD5Context md5_session_nonce_ctx;
 632                         SMB_ASSERT(ntlmssp_state->internal_chal.data && ntlmssp_state->internal_chal.length == 8);
 633
 634                         doing_ntlm2 = True;
 635
 636                         memcpy(session_nonce, ntlmssp_state->internal_chal.data, 8);
 637                         memcpy(&session_nonce[8], ntlmssp_state->lm_resp.data, 8);
 638
 639                         MD5Init(&md5_session_nonce_ctx);
 640                         MD5Update(&md5_session_nonce_ctx, session_nonce, 16);
 641                         MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
 642
 643                         ntlmssp_state->chal = data_blob_talloc(ntlmssp_state->mem_ctx, session_nonce_hash, 8);
 644
 645                         /* LM response is no longer useful */
 646                         data_blob_free(&ntlmssp_state->lm_resp);
 647
 648                         /* We changed the effective challenge - set it */
 649                         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->set_challenge(ntlmssp_state, &ntlmssp_state->chal))) {
 650                                 data_blob_free(&encrypted_session_key);
 651                                 return nt_status;
 652                         }
 653                 }
 654         }
 655
 656         /*
 657          * Note we don't check here for NTLMv2 auth settings. If NTLMv2 auth
 658          * is required (by "ntlm auth = no" and "lm auth = no" being set in the
 659          * smb.conf file) and no NTLMv2 response was sent then the password check
 660          * will fail here. JRA.
 661          */
 662
 663         /* Finally, actually ask if the password is OK */
 664
 665         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_state->check_password(ntlmssp_state,
 666                                                                        &nt_session_key, &lm_session_key))) {
 667                 data_blob_free(&encrypted_session_key);
 668                 return nt_status;
 669         }
 670
 671         dump_data_pw("NT session key:\n", nt_session_key.data, nt_session_key.length);
 672         dump_data_pw("LM first-8:\n", lm_session_key.data, lm_session_key.length);
 673
 674         /* Handle the different session key derivation for NTLM2 */
 675         if (doing_ntlm2) {
 676                 if (nt_session_key.data && nt_session_key.length == 16) {
 677                         session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 678                         hmac_md5(nt_session_key.data, session_nonce,
 679                                  sizeof(session_nonce), session_key.data);
 680                         DEBUG(10,("ntlmssp_server_auth: Created NTLM2 session key.\n"));
 681                         dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
 682
 683                 } else {
 684                         DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM2 session key.\n"));
 685                         session_key = data_blob(NULL, 0);
 686                 }
 687         } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) {
 688                 if (lm_session_key.data && lm_session_key.length >= 8) {
 689                         if (ntlmssp_state->lm_resp.data && ntlmssp_state->lm_resp.length == 24) {
 690                                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 691                                 SMBsesskeygen_lm_sess_key(lm_session_key.data, ntlmssp_state->lm_resp.data,
 692                                                           session_key.data);
 693                                 DEBUG(10,("ntlmssp_server_auth: Created NTLM session key.\n"));
 694                                 dump_data_pw("LM session key:\n", session_key.data, session_key.length);
 695                         } else {
 696                                 /* use the key unmodified - it's
 697                                  * probably a NULL key from the guest
 698                                  * login */
 699                                 session_key = lm_session_key;
 700                         }
 701                 } else {
 702                         DEBUG(10,("ntlmssp_server_auth: Failed to create NTLM session key.\n"));
 703                         session_key = data_blob(NULL, 0);
 704                 }
 705         } else if (nt_session_key.data) {
 706                 session_key = nt_session_key;
 707                 DEBUG(10,("ntlmssp_server_auth: Using unmodified nt session key.\n"));
 708                 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
 709         } else if (lm_session_key.data) {
 710                 session_key = lm_session_key;
 711                 DEBUG(10,("ntlmssp_server_auth: Using unmodified lm session key.\n"));
 712                 dump_data_pw("unmodified session key:\n", session_key.data, session_key.length);
 713         } else {
 714                 DEBUG(10,("ntlmssp_server_auth: Failed to create unmodified session key.\n"));
 715                 session_key = data_blob(NULL, 0);
 716         }
 717
 718         /* With KEY_EXCH, the client supplies the proposed session key,
 719            but encrypts it with the long-term key */
 720         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
 721                 if (!encrypted_session_key.data || encrypted_session_key.length != 16) {
 722                         data_blob_free(&encrypted_session_key);
 723                         DEBUG(1, ("Client-supplied KEY_EXCH session key was of invalid length (%u)!\n",
 724                                   encrypted_session_key.length));
 725                         return NT_STATUS_INVALID_PARAMETER;
 726                 } else if (!session_key.data || session_key.length != 16) {
 727                         DEBUG(5, ("server session key is invalid (len == %u), cannot do KEY_EXCH!\n",
 728                                   session_key.length));
 729                         ntlmssp_state->session_key = session_key;
 730                 } else {
 731                         dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
 732                         SamOEMhash(encrypted_session_key.data,
 733                                    session_key.data,
 734                                    encrypted_session_key.length);
 735                         ntlmssp_state->session_key = data_blob_talloc(ntlmssp_state->mem_ctx,
 736                                                                       encrypted_session_key.data,
 737                                                                       encrypted_session_key.length);
 738                         dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data,
 739                                      encrypted_session_key.length);
 740                 }
 741         } else {
 742                 ntlmssp_state->session_key = session_key;
 743         }
 744
 745         if (!NT_STATUS_IS_OK(nt_status)) {
 746                 ntlmssp_state->session_key = data_blob(NULL, 0);
 747         } else if (ntlmssp_state->session_key.length) {
 748                 nt_status = ntlmssp_sign_init(ntlmssp_state);
 749         }
 750
 751         data_blob_free(&encrypted_session_key);
 752
 753         /* allow arbitarily many authentications */
 754         ntlmssp_state->expected_state = NTLMSSP_AUTH;
 755
 756         return nt_status;
 757 }
 758
 759 /**
 760  * Create an NTLMSSP state machine
 761  *
 762  * @param ntlmssp_state NTLMSSP State, allocated by this function
 763  */
 764
 765 NTSTATUS ntlmssp_server_start(NTLMSSP_STATE **ntlmssp_state)
 766 {
 767         TALLOC_CTX *mem_ctx;
 768
 769         mem_ctx = talloc_init("NTLMSSP context");
 770
 771         *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state));
 772         if (!*ntlmssp_state) {
 773                 DEBUG(0,("ntlmssp_server_start: talloc failed!\n"));
 774                 talloc_destroy(mem_ctx);
 775                 return NT_STATUS_NO_MEMORY;
 776         }
 777
 778         (*ntlmssp_state)->role = NTLMSSP_SERVER;
 779
 780         (*ntlmssp_state)->mem_ctx = mem_ctx;
 781         (*ntlmssp_state)->get_challenge = get_challenge;
 782         (*ntlmssp_state)->set_challenge = set_challenge;
 783         (*ntlmssp_state)->may_set_challenge = may_set_challenge;
 784
 785         (*ntlmssp_state)->get_global_myname = global_myname;
 786         (*ntlmssp_state)->get_domain = lp_workgroup;
 787         (*ntlmssp_state)->server_role = ROLE_DOMAIN_MEMBER; /* a good default */
 788
 789         (*ntlmssp_state)->expected_state = NTLMSSP_NEGOTIATE;
 790
 791         (*ntlmssp_state)->ref_count = 1;
 792
 793         (*ntlmssp_state)->neg_flags =
 794                 NTLMSSP_NEGOTIATE_128 |
 795                 NTLMSSP_NEGOTIATE_NTLM |
 796                 NTLMSSP_NEGOTIATE_NTLM2 |
 797                 NTLMSSP_NEGOTIATE_KEY_EXCH |
 798                 NTLMSSP_NEGOTIATE_SIGN;
 799
 800         return NT_STATUS_OK;
 801 }
 802
 803 /*********************************************************************
 804  Client side NTLMSSP
 805 *********************************************************************/
 806
 807 /**
 808  * Next state function for the Initial packet
 809  *
 810  * @param ntlmssp_state NTLMSSP State
 811  * @param request The request, as a DATA_BLOB.  reply.data must be NULL
 812  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 813  * @return Errors or NT_STATUS_OK.
 814  */
 815
 816 static NTSTATUS ntlmssp_client_initial(struct ntlmssp_state *ntlmssp_state,
 817                                   DATA_BLOB reply, DATA_BLOB *next_request)
 818 {
 819         if (ntlmssp_state->unicode) {
 820                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
 821         } else {
 822                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
 823         }
 824
 825         if (ntlmssp_state->use_ntlmv2) {
 826                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
 827         }
 828
 829         /* generate the ntlmssp negotiate packet */
 830         msrpc_gen(next_request, "CddAA",
 831                   "NTLMSSP",
 832                   NTLMSSP_NEGOTIATE,
 833                   ntlmssp_state->neg_flags,
 834                   ntlmssp_state->get_domain(),
 835                   ntlmssp_state->get_global_myname());
 836
 837         ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
 838
 839         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 840 }
 841
 842 /**
 843  * Next state function for the Challenge Packet.  Generate an auth packet.
 844  *
 845  * @param ntlmssp_state NTLMSSP State
 846  * @param request The request, as a DATA_BLOB.  reply.data must be NULL
 847  * @param request The reply, as an allocated DATA_BLOB, caller to free.
 848  * @return Errors or NT_STATUS_OK.
 849  */
 850
 851 static NTSTATUS ntlmssp_client_challenge(struct ntlmssp_state *ntlmssp_state,
 852                                          const DATA_BLOB reply, DATA_BLOB *next_request)
 853 {
 854         uint32 chal_flags, ntlmssp_command, unkn1, unkn2;
 855         DATA_BLOB server_domain_blob;
 856         DATA_BLOB challenge_blob;
 857         DATA_BLOB struct_blob = data_blob(NULL, 0);
 858         char *server_domain;
 859         const char *chal_parse_string;
 860         const char *auth_gen_string;
 861         DATA_BLOB lm_response = data_blob(NULL, 0);
 862         DATA_BLOB nt_response = data_blob(NULL, 0);
 863         DATA_BLOB session_key = data_blob(NULL, 0);
 864         DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
 865         NTSTATUS nt_status;
 866
 867         if (!msrpc_parse(&reply, "CdBd",
 868                          "NTLMSSP",
 869                          &ntlmssp_command,
 870                          &server_domain_blob,
 871                          &chal_flags)) {
 872                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
 873                 dump_data(2, (const char *)reply.data, reply.length);
 874
 875                 return NT_STATUS_INVALID_PARAMETER;
 876         }
 877
 878         data_blob_free(&server_domain_blob);
 879
 880         DEBUG(3, ("Got challenge flags:\n"));
 881         debug_ntlmssp_flags(chal_flags);
 882
 883         ntlmssp_handle_neg_flags(ntlmssp_state, chal_flags, lp_client_lanman_auth());
 884
 885         if (ntlmssp_state->unicode) {
 886                 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
 887                         chal_parse_string = "CdUdbddB";
 888                 } else {
 889                         chal_parse_string = "CdUdbdd";
 890                 }
 891                 auth_gen_string = "CdBBUUUBd";
 892         } else {
 893                 if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
 894                         chal_parse_string = "CdAdbddB";
 895                 } else {
 896                         chal_parse_string = "CdAdbdd";
 897                 }
 898
 899                 auth_gen_string = "CdBBAAABd";
 900         }
 901
 902         DEBUG(3, ("NTLMSSP: Set final flags:\n"));
 903         debug_ntlmssp_flags(ntlmssp_state->neg_flags);
 904
 905         if (!msrpc_parse(&reply, chal_parse_string,
 906                          "NTLMSSP",
 907                          &ntlmssp_command,
 908                          &server_domain,
 909                          &chal_flags,
 910                          &challenge_blob, 8,
 911                          &unkn1, &unkn2,
 912                          &struct_blob)) {
 913                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
 914                 dump_data(2, (const char *)reply.data, reply.length);
 915                 return NT_STATUS_INVALID_PARAMETER;
 916         }
 917
 918         ntlmssp_state->server_domain = talloc_strdup(ntlmssp_state->mem_ctx,
 919                                                      server_domain);
 920
 921         SAFE_FREE(server_domain);
 922         if (challenge_blob.length != 8) {
 923                 data_blob_free(&struct_blob);
 924                 return NT_STATUS_INVALID_PARAMETER;
 925         }
 926
 927         if (!ntlmssp_state->password) {
 928                 static const uchar zeros[16];
 929                 /* do nothing - blobs are zero length */
 930
 931                 /* session key is all zeros */
 932                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, zeros, 16);
 933
 934                 /* not doing NLTM2 without a password */
 935                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 936         } else if (ntlmssp_state->use_ntlmv2) {
 937
 938                 if (!struct_blob.length) {
 939                         /* be lazy, match win2k - we can't do NTLMv2 without it */
 940                         DEBUG(1, ("Server did not provide 'target information', required for NTLMv2\n"));
 941                         return NT_STATUS_INVALID_PARAMETER;
 942                 }
 943
 944                 /* TODO: if the remote server is standalone, then we should replace 'domain'
 945                    with the server name as supplied above */
 946
 947                 if (!SMBNTLMv2encrypt(ntlmssp_state->user,
 948                                       ntlmssp_state->domain,
 949                                       ntlmssp_state->password, &challenge_blob,
 950                                       &struct_blob,
 951                                       &lm_response, &nt_response, &session_key)) {
 952                         data_blob_free(&challenge_blob);
 953                         data_blob_free(&struct_blob);
 954                         return NT_STATUS_NO_MEMORY;
 955                 }
 956         } else if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 957                 struct MD5Context md5_session_nonce_ctx;
 958                 uchar nt_hash[16];
 959                 uchar session_nonce[16];
 960                 uchar session_nonce_hash[16];
 961                 uchar nt_session_key[16];
 962                 E_md4hash(ntlmssp_state->password, nt_hash);
 963
 964                 lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
 965                 generate_random_buffer(lm_response.data, 8, False);
 966                 memset(lm_response.data+8, 0, 16);
 967
 968                 memcpy(session_nonce, challenge_blob.data, 8);
 969                 memcpy(&session_nonce[8], lm_response.data, 8);
 970
 971                 MD5Init(&md5_session_nonce_ctx);
 972                 MD5Update(&md5_session_nonce_ctx, challenge_blob.data, 8);
 973                 MD5Update(&md5_session_nonce_ctx, lm_response.data, 8);
 974                 MD5Final(session_nonce_hash, &md5_session_nonce_ctx);
 975
 976                 DEBUG(5, ("NTLMSSP challenge set by NTLM2\n"));
 977                 DEBUG(5, ("challenge is: \n"));
 978                 dump_data(5, (const char *)session_nonce_hash, 8);
 979
 980                 nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
 981                 SMBNTencrypt(ntlmssp_state->password,
 982                              session_nonce_hash,
 983                              nt_response.data);
 984
 985                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
 986
 987                 SMBsesskeygen_ntv1(nt_hash, NULL, nt_session_key);
 988                 hmac_md5(nt_session_key, session_nonce, sizeof(session_nonce), session_key.data);
 989                 dump_data_pw("NTLM2 session key:\n", session_key.data, session_key.length);
 990         } else {
 991
 992
 993                 uchar lm_hash[16];
 994                 uchar nt_hash[16];
 995                 E_deshash(ntlmssp_state->password, lm_hash);
 996                 E_md4hash(ntlmssp_state->password, nt_hash);
 997
 998                 /* lanman auth is insecure, it may be disabled */
 999                 if (lp_client_lanman_auth()) {
1000                         lm_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
1001                         SMBencrypt(ntlmssp_state->password,challenge_blob.data,
1002                                    lm_response.data);
1003                 }
1004
1005                 nt_response = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 24);
1006                 SMBNTencrypt(ntlmssp_state->password,challenge_blob.data,
1007                              nt_response.data);
1008
1009                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, NULL, 16);
1010                 if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
1011                     && lp_client_lanman_auth()) {
1012                         SMBsesskeygen_lmv1(lm_hash, lm_response.data,
1013                                            session_key.data);
1014                         dump_data_pw("LM session key\n", session_key.data, session_key.length);
1015                 } else {
1016                         SMBsesskeygen_ntv1(nt_hash, NULL, session_key.data);
1017                         dump_data_pw("NT session key:\n", session_key.data, session_key.length);
1018                 }
1019         }
1020         data_blob_free(&struct_blob);
1021
1022         /* Key exchange encryptes a new client-generated session key with
1023            the password-derived key */
1024         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
1025                 /* Make up a new session key */
1026                 uint8 client_session_key[16];
1027                 generate_random_buffer(client_session_key, sizeof(client_session_key), False);
1028
1029                 /* Encrypt the new session key with the old one */
1030                 encrypted_session_key = data_blob(client_session_key, sizeof(client_session_key));
1031                 dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
1032                 SamOEMhash(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
1033                 dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
1034
1035                 /* Mark the new session key as the 'real' session key */
1036                 data_blob_free(&session_key);
1037                 session_key = data_blob_talloc(ntlmssp_state->mem_ctx, client_session_key, sizeof(client_session_key));
1038         }
1039
1040         /* this generates the actual auth packet */
1041         if (!msrpc_gen(next_request, auth_gen_string,
1042                        "NTLMSSP",
1043                        NTLMSSP_AUTH,
1044                        lm_response.data, lm_response.length,
1045                        nt_response.data, nt_response.length,
1046                        ntlmssp_state->domain,
1047                        ntlmssp_state->user,
1048                        ntlmssp_state->get_global_myname(),
1049                        encrypted_session_key.data, encrypted_session_key.length,
1050                        ntlmssp_state->neg_flags)) {
1051
1052                 return NT_STATUS_NO_MEMORY;
1053         }
1054
1055         data_blob_free(&encrypted_session_key);
1056
1057         data_blob_free(&ntlmssp_state->chal);
1058
1059         ntlmssp_state->chal = challenge_blob;
1060         ntlmssp_state->lm_resp = lm_response;
1061         ntlmssp_state->nt_resp = nt_response;
1062         ntlmssp_state->session_key = session_key;
1063
1064         ntlmssp_state->expected_state = NTLMSSP_UNKNOWN;
1065
1066         if (!NT_STATUS_IS_OK(nt_status = ntlmssp_sign_init(ntlmssp_state))) {
1067                 DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n", nt_errstr(nt_status)));
1068                 return nt_status;
1069         }
1070
1071         return NT_STATUS_MORE_PROCESSING_REQUIRED;
1072 }
1073
1074 NTSTATUS ntlmssp_client_start(NTLMSSP_STATE **ntlmssp_state)
1075 {
1076         TALLOC_CTX *mem_ctx;
1077
1078         mem_ctx = talloc_init("NTLMSSP Client context");
1079
1080         *ntlmssp_state = talloc_zero(mem_ctx, sizeof(**ntlmssp_state));
1081         if (!*ntlmssp_state) {
1082                 DEBUG(0,("ntlmssp_client_start: talloc failed!\n"));
1083                 talloc_destroy(mem_ctx);
1084                 return NT_STATUS_NO_MEMORY;
1085         }
1086
1087         (*ntlmssp_state)->role = NTLMSSP_CLIENT;
1088
1089         (*ntlmssp_state)->mem_ctx = mem_ctx;
1090
1091         (*ntlmssp_state)->get_global_myname = global_myname;
1092         (*ntlmssp_state)->get_domain = lp_workgroup;
1093
1094         (*ntlmssp_state)->unicode = True;
1095
1096         (*ntlmssp_state)->use_ntlmv2 = lp_client_ntlmv2_auth();
1097
1098         (*ntlmssp_state)->expected_state = NTLMSSP_INITIAL;
1099
1100         (*ntlmssp_state)->ref_count = 1;
1101
1102         (*ntlmssp_state)->neg_flags =
1103                 NTLMSSP_NEGOTIATE_128 |
1104                 NTLMSSP_NEGOTIATE_NTLM |
1105                 NTLMSSP_NEGOTIATE_NTLM2 |
1106                 NTLMSSP_NEGOTIATE_KEY_EXCH |
1107                 /*
1108                  * We need to set this to allow a later SetPassword
1109                  * via the SAMR pipe to succeed. Strange.... We could
1110                  * also add  NTLMSSP_NEGOTIATE_SEAL here. JRA.
1111                  * */
1112                 NTLMSSP_NEGOTIATE_SIGN |
1113                 NTLMSSP_REQUEST_TARGET;
1114
1115         return NT_STATUS_OK;
1116 }
1117