auth/ntlmssp/ntlmssp_client.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    handle NLTMSSP, client server side parsing
   5
   6    Copyright (C) Andrew Tridgell      2001
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
   8    Copyright (C) Stefan Metzmacher 2005
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 struct auth_session_info;
  25
  26 #include "includes.h"
  27 #include "auth/ntlmssp/ntlmssp.h"
  28 #include "../lib/crypto/crypto.h"
  29 #include "../libcli/auth/libcli_auth.h"
  30 #include "auth/credentials/credentials.h"
  31 #include "auth/gensec/gensec.h"
  32 #include "auth/gensec/gensec_internal.h"
  33 #include "param/param.h"
  34 #include "auth/ntlmssp/ntlmssp_private.h"
  35 #include "../librpc/gen_ndr/ndr_ntlmssp.h"
  36 #include "../auth/ntlmssp/ntlmssp_ndr.h"
  37 #include "../nsswitch/libwbclient/wbclient.h"
  38
  39 /*********************************************************************
  40  Client side NTLMSSP
  41 *********************************************************************/
  42
  43 /**
  44  * Next state function for the Initial packet
  45  *
  46  * @param ntlmssp_state NTLMSSP State
  47  * @param out_mem_ctx The DATA_BLOB *out will be allocated on this context
  48  * @param in A NULL data blob (input ignored)
  49  * @param out The initial negotiate request to the server, as an talloc()ed DATA_BLOB, on out_mem_ctx
  50  * @return Errors or NT_STATUS_OK.
  51  */
  52
  53 NTSTATUS ntlmssp_client_initial(struct gensec_security *gensec_security,
  54                                 TALLOC_CTX *out_mem_ctx,
  55                                 DATA_BLOB in, DATA_BLOB *out)
  56 {
  57         struct gensec_ntlmssp_context *gensec_ntlmssp =
  58                 talloc_get_type_abort(gensec_security->private_data,
  59                                       struct gensec_ntlmssp_context);
  60         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
  61         NTSTATUS status;
  62         const DATA_BLOB version_blob = ntlmssp_version_blob();
  63
  64         /* generate the ntlmssp negotiate packet */
  65         status = msrpc_gen(out_mem_ctx,
  66                   out, "CddAAb",
  67                   "NTLMSSP",
  68                   NTLMSSP_NEGOTIATE,
  69                   ntlmssp_state->neg_flags,
  70                   "", /* domain */
  71                   "", /* workstation */
  72                   version_blob.data, version_blob.length);
  73         if (!NT_STATUS_IS_OK(status)) {
  74                 DEBUG(0, ("ntlmssp_client_initial: failed to generate "
  75                           "ntlmssp negotiate packet\n"));
  76                 return status;
  77         }
  78
  79         if (DEBUGLEVEL >= 10) {
  80                 struct NEGOTIATE_MESSAGE *negotiate = talloc(
  81                         ntlmssp_state, struct NEGOTIATE_MESSAGE);
  82                 if (negotiate != NULL) {
  83                         status = ntlmssp_pull_NEGOTIATE_MESSAGE(
  84                                 out, negotiate, negotiate);
  85                         if (NT_STATUS_IS_OK(status)) {
  86                                 NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
  87                                                 negotiate);
  88                         }
  89                         TALLOC_FREE(negotiate);
  90                 }
  91         }
  92
  93         ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
  94
  95         return NT_STATUS_MORE_PROCESSING_REQUIRED;
  96 }
  97
  98 NTSTATUS gensec_ntlmssp_resume_ccache(struct gensec_security *gensec_security,
  99                                 TALLOC_CTX *out_mem_ctx,
 100                                 DATA_BLOB in, DATA_BLOB *out)
 101 {
 102         struct gensec_ntlmssp_context *gensec_ntlmssp =
 103                 talloc_get_type_abort(gensec_security->private_data,
 104                                       struct gensec_ntlmssp_context);
 105         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
 106         uint32_t neg_flags = 0;
 107         uint32_t ntlmssp_command;
 108         NTSTATUS status;
 109         bool ok;
 110
 111         *out = data_blob_null;
 112
 113         if (in.length == 0) {
 114                 /*
 115                  * This is compat code for older callers
 116                  * which were missing the "initial_blob"
 117                  */
 118                 ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
 119                 ntlmssp_state->required_flags = 0;
 120                 ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
 121                 return NT_STATUS_MORE_PROCESSING_REQUIRED;
 122         }
 123
 124         /* parse the NTLMSSP packet */
 125
 126         if (in.length > UINT16_MAX) {
 127                 DEBUG(1, ("%s: reject large request of length %u\n",
 128                         __func__, (unsigned int)in.length));
 129                 return NT_STATUS_INVALID_PARAMETER;
 130         }
 131
 132         ok = msrpc_parse(ntlmssp_state, &in, "Cdd",
 133                          "NTLMSSP",
 134                          &ntlmssp_command,
 135                          &neg_flags);
 136         if (!ok) {
 137                 DEBUG(1, ("%s: failed to parse NTLMSSP Negotiate of length %u\n",
 138                         __func__, (unsigned int)in.length));
 139                 dump_data(2, in.data, in.length);
 140                 return NT_STATUS_INVALID_PARAMETER;
 141         }
 142
 143         if (ntlmssp_command != NTLMSSP_NEGOTIATE) {
 144                 DEBUG(1, ("%s: no NTLMSSP Negotiate message (length %u)\n",
 145                         __func__, (unsigned int)in.length));
 146                 dump_data(2, in.data, in.length);
 147                 return NT_STATUS_INVALID_PARAMETER;
 148         }
 149
 150         ntlmssp_state->neg_flags = neg_flags;
 151         DEBUG(3, ("Imported Negotiate flags:\n"));
 152         debug_ntlmssp_flags(neg_flags);
 153
 154         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
 155                 ntlmssp_state->unicode = true;
 156         } else {
 157                 ntlmssp_state->unicode = false;
 158         }
 159
 160         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
 161                 gensec_security->want_features |= GENSEC_FEATURE_SIGN;
 162
 163                 ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
 164         }
 165
 166         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
 167                 gensec_security->want_features |= GENSEC_FEATURE_SEAL;
 168
 169                 ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
 170                 ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SEAL;
 171         }
 172
 173         ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
 174         ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
 175
 176         if (DEBUGLEVEL >= 10) {
 177                 struct NEGOTIATE_MESSAGE *negotiate = talloc(
 178                         ntlmssp_state, struct NEGOTIATE_MESSAGE);
 179                 if (negotiate != NULL) {
 180                         status = ntlmssp_pull_NEGOTIATE_MESSAGE(
 181                                 &in, negotiate, negotiate);
 182                         if (NT_STATUS_IS_OK(status)) {
 183                                 NDR_PRINT_DEBUG(NEGOTIATE_MESSAGE,
 184                                                 negotiate);
 185                         }
 186                         TALLOC_FREE(negotiate);
 187                 }
 188         }
 189
 190         ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
 191
 192         return NT_STATUS_MORE_PROCESSING_REQUIRED;
 193 }
 194
 195 /**
 196  * Next state function for the Challenge Packet.  Generate an auth packet.
 197  *
 198  * @param gensec_security GENSEC state
 199  * @param out_mem_ctx Memory context for *out
 200  * @param in The server challnege, as a DATA_BLOB.  reply.data must be NULL
 201  * @param out The next request (auth packet) to the server, as an allocated DATA_BLOB, on the out_mem_ctx context
 202  * @return Errors or NT_STATUS_OK.
 203  */
 204
 205 NTSTATUS ntlmssp_client_challenge(struct gensec_security *gensec_security,
 206                                   TALLOC_CTX *out_mem_ctx,
 207                                   const DATA_BLOB in, DATA_BLOB *out)
 208 {
 209         struct gensec_ntlmssp_context *gensec_ntlmssp =
 210                 talloc_get_type_abort(gensec_security->private_data,
 211                                       struct gensec_ntlmssp_context);
 212         struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
 213         uint32_t chal_flags, ntlmssp_command, unkn1 = 0, unkn2 = 0;
 214         DATA_BLOB server_domain_blob;
 215         DATA_BLOB challenge_blob;
 216         DATA_BLOB target_info = data_blob(NULL, 0);
 217         char *server_domain;
 218         const char *chal_parse_string;
 219         const char *chal_parse_string_short = NULL;
 220         const char *auth_gen_string;
 221         DATA_BLOB lm_response = data_blob(NULL, 0);
 222         DATA_BLOB nt_response = data_blob(NULL, 0);
 223         DATA_BLOB session_key = data_blob(NULL, 0);
 224         DATA_BLOB lm_session_key = data_blob(NULL, 0);
 225         DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
 226         NTSTATUS nt_status;
 227         int flags = 0;
 228         const char *user = NULL, *domain = NULL, *workstation = NULL;
 229         bool is_anonymous = false;
 230         const DATA_BLOB version_blob = ntlmssp_version_blob();
 231         const NTTIME *server_timestamp = NULL;
 232
 233         TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
 234         if (!mem_ctx) {
 235                 return NT_STATUS_NO_MEMORY;
 236         }
 237
 238         if (!msrpc_parse(mem_ctx,
 239                          &in, "CdBd",
 240                          "NTLMSSP",
 241                          &ntlmssp_command,
 242                          &server_domain_blob,
 243                          &chal_flags)) {
 244                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
 245                 dump_data(2, in.data, in.length);
 246                 talloc_free(mem_ctx);
 247
 248                 return NT_STATUS_INVALID_PARAMETER;
 249         }
 250
 251         data_blob_free(&server_domain_blob);
 252
 253         DEBUG(3, ("Got challenge flags:\n"));
 254         debug_ntlmssp_flags(chal_flags);
 255
 256         nt_status = ntlmssp_handle_neg_flags(ntlmssp_state,
 257                                              chal_flags, "challenge");
 258         if (!NT_STATUS_IS_OK(nt_status)) {
 259                 return nt_status;
 260         }
 261
 262         if (ntlmssp_state->unicode) {
 263                 if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
 264                         chal_parse_string = "CdUdbddB";
 265                 } else {
 266                         chal_parse_string = "CdUdbdd";
 267                         chal_parse_string_short = "CdUdb";
 268                 }
 269                 auth_gen_string = "CdBBUUUBdb";
 270         } else {
 271                 if (chal_flags & NTLMSSP_NEGOTIATE_TARGET_INFO) {
 272                         chal_parse_string = "CdAdbddB";
 273                 } else {
 274                         chal_parse_string = "CdAdbdd";
 275                         chal_parse_string_short = "CdAdb";
 276                 }
 277
 278                 auth_gen_string = "CdBBAAABdb";
 279         }
 280
 281         if (!msrpc_parse(mem_ctx,
 282                          &in, chal_parse_string,
 283                          "NTLMSSP",
 284                          &ntlmssp_command,
 285                          &server_domain,
 286                          &chal_flags,
 287                          &challenge_blob, 8,
 288                          &unkn1, &unkn2,
 289                          &target_info)) {
 290
 291                 bool ok = false;
 292
 293                 DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
 294
 295                 if (chal_parse_string_short != NULL) {
 296                         /*
 297                          * In the case where NTLMSSP_NEGOTIATE_TARGET_INFO
 298                          * is not used, some NTLMSSP servers don't return
 299                          * the unused unkn1 and unkn2 fields.
 300                          * See bug:
 301                          * https://bugzilla.samba.org/show_bug.cgi?id=10016
 302                          * for packet traces.
 303                          * Try and parse again without them.
 304                          */
 305                         ok = msrpc_parse(mem_ctx,
 306                                 &in, chal_parse_string_short,
 307                                 "NTLMSSP",
 308                                 &ntlmssp_command,
 309                                 &server_domain,
 310                                 &chal_flags,
 311                                 &challenge_blob, 8);
 312                         if (!ok) {
 313                                 DEBUG(1, ("Failed to short parse "
 314                                         "the NTLMSSP Challenge: (#2)\n"));
 315                         }
 316                 }
 317
 318                 if (!ok) {
 319                         dump_data(2, in.data, in.length);
 320                         talloc_free(mem_ctx);
 321                         return NT_STATUS_INVALID_PARAMETER;
 322                 }
 323         }
 324
 325         if (chal_flags & NTLMSSP_TARGET_TYPE_SERVER) {
 326                 ntlmssp_state->server.is_standalone = true;
 327         } else {
 328                 ntlmssp_state->server.is_standalone = false;
 329         }
 330         /* TODO: parse struct_blob and fill in the rest */
 331         ntlmssp_state->server.netbios_name = "";
 332         ntlmssp_state->server.netbios_domain = talloc_move(ntlmssp_state, &server_domain);
 333         ntlmssp_state->server.dns_name = "";
 334         ntlmssp_state->server.dns_domain = "";
 335
 336         if (challenge_blob.length != 8) {
 337                 talloc_free(mem_ctx);
 338                 return NT_STATUS_INVALID_PARAMETER;
 339         }
 340
 341         is_anonymous = cli_credentials_is_anonymous(gensec_security->credentials);
 342         cli_credentials_get_ntlm_username_domain(gensec_security->credentials, mem_ctx,
 343                                                  &user, &domain);
 344
 345         workstation = cli_credentials_get_workstation(gensec_security->credentials);
 346
 347         if (user == NULL) {
 348                 DEBUG(10, ("User is NULL, returning INVALID_PARAMETER\n"));
 349                 return NT_STATUS_INVALID_PARAMETER;
 350         }
 351
 352         if (domain == NULL) {
 353                 DEBUG(10, ("Domain is NULL, returning INVALID_PARAMETER\n"));
 354                 return NT_STATUS_INVALID_PARAMETER;
 355         }
 356
 357         if (workstation == NULL) {
 358                 DEBUG(10, ("Workstation is NULL, returning INVALID_PARAMETER\n"));
 359                 return NT_STATUS_INVALID_PARAMETER;
 360         }
 361
 362         if (is_anonymous) {
 363                 ntlmssp_state->neg_flags |= NTLMSSP_ANONYMOUS;
 364                 /*
 365                  * don't use the ccache for anonymous auth
 366                  */
 367                 ntlmssp_state->use_ccache = false;
 368         }
 369         if (ntlmssp_state->use_ccache) {
 370                 struct samr_Password *nt_hash = NULL;
 371
 372                 /*
 373                  * If we have a password given we don't
 374                  * use the ccache
 375                  */
 376                 nt_hash = cli_credentials_get_nt_hash(gensec_security->credentials,
 377                                                       mem_ctx);
 378                 if (nt_hash != NULL) {
 379                         ZERO_STRUCTP(nt_hash);
 380                         TALLOC_FREE(nt_hash);
 381                         ntlmssp_state->use_ccache = false;
 382                 }
 383         }
 384
 385         if (ntlmssp_state->use_ccache) {
 386                 struct wbcCredentialCacheParams params;
 387                 struct wbcCredentialCacheInfo *info = NULL;
 388                 struct wbcAuthErrorInfo *error = NULL;
 389                 struct wbcNamedBlob auth_blobs[1];
 390                 const struct wbcBlob *wbc_auth_blob = NULL;
 391                 const struct wbcBlob *wbc_session_key = NULL;
 392                 wbcErr wbc_status;
 393                 int i;
 394
 395                 params.account_name = user;
 396                 params.domain_name = domain;
 397                 params.level = WBC_CREDENTIAL_CACHE_LEVEL_NTLMSSP;
 398
 399                 auth_blobs[0].name = "challenge_blob";
 400                 auth_blobs[0].flags = 0;
 401                 auth_blobs[0].blob.data = in.data;
 402                 auth_blobs[0].blob.length = in.length;
 403                 params.num_blobs = ARRAY_SIZE(auth_blobs);
 404                 params.blobs = auth_blobs;
 405
 406                 wbc_status = wbcCredentialCache(&params, &info, &error);
 407                 wbcFreeMemory(error);
 408                 if (!WBC_ERROR_IS_OK(wbc_status)) {
 409                         return NT_STATUS_WRONG_CREDENTIAL_HANDLE;
 410                 }
 411
 412                 for (i=0; i<info->num_blobs; i++) {
 413                         if (strequal(info->blobs[i].name, "auth_blob")) {
 414                                 wbc_auth_blob = &info->blobs[i].blob;
 415                         }
 416                         if (strequal(info->blobs[i].name, "session_key")) {
 417                                 wbc_session_key = &info->blobs[i].blob;
 418                         }
 419                 }
 420                 if ((wbc_auth_blob == NULL) || (wbc_session_key == NULL)) {
 421                         wbcFreeMemory(info);
 422                         return NT_STATUS_WRONG_CREDENTIAL_HANDLE;
 423                 }
 424
 425                 session_key = data_blob_talloc(mem_ctx,
 426                                                wbc_session_key->data,
 427                                                wbc_session_key->length);
 428                 if (session_key.length != wbc_session_key->length) {
 429                         wbcFreeMemory(info);
 430                         return NT_STATUS_NO_MEMORY;
 431                 }
 432                 *out = data_blob_talloc(mem_ctx,
 433                                         wbc_auth_blob->data,
 434                                         wbc_auth_blob->length);
 435                 if (out->length != wbc_auth_blob->length) {
 436                         wbcFreeMemory(info);
 437                         return NT_STATUS_NO_MEMORY;
 438                 }
 439
 440                 wbcFreeMemory(info);
 441                 goto done;
 442         }
 443
 444         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
 445                 flags |= CLI_CRED_NTLM2;
 446         }
 447         if (ntlmssp_state->use_ntlmv2) {
 448                 flags |= CLI_CRED_NTLMv2_AUTH;
 449         }
 450         if (ntlmssp_state->use_nt_response) {
 451                 flags |= CLI_CRED_NTLM_AUTH;
 452         }
 453         if (ntlmssp_state->allow_lm_response) {
 454                 flags |= CLI_CRED_LANMAN_AUTH;
 455         }
 456
 457         nt_status = cli_credentials_get_ntlm_response(gensec_security->credentials, mem_ctx,
 458                                                       &flags, challenge_blob,
 459                                                       server_timestamp, target_info,
 460                                                       &lm_response, &nt_response,
 461                                                       &lm_session_key, &session_key);
 462         if (!NT_STATUS_IS_OK(nt_status)) {
 463                 return nt_status;
 464         }
 465
 466         if (!(flags & CLI_CRED_LANMAN_AUTH)) {
 467                 /* LM Key is still possible, just silly, so we do not
 468                  * allow it. Fortunetly all LM crypto is off by
 469                  * default and we require command line options to end
 470                  * up here */
 471                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
 472         }
 473
 474         if (!(flags & CLI_CRED_NTLM2)) {
 475                 /* NTLM2 is incompatible... */
 476                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 477         }
 478
 479         if ((ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
 480             && ntlmssp_state->allow_lm_key && lm_session_key.length == 16) {
 481                 DATA_BLOB new_session_key = data_blob_talloc(mem_ctx, NULL, 16);
 482                 if (lm_response.length == 24) {
 483                         SMBsesskeygen_lm_sess_key(lm_session_key.data, lm_response.data,
 484                                                   new_session_key.data);
 485                 } else {
 486                         static const uint8_t zeros[24];
 487                         SMBsesskeygen_lm_sess_key(lm_session_key.data, zeros,
 488                                                   new_session_key.data);
 489                 }
 490                 session_key = new_session_key;
 491                 dump_data_pw("LM session key\n", session_key.data, session_key.length);
 492         }
 493
 494
 495         /* Key exchange encryptes a new client-generated session key with
 496            the password-derived key */
 497         if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
 498                 /* Make up a new session key */
 499                 uint8_t client_session_key[16];
 500                 generate_secret_buffer(client_session_key, sizeof(client_session_key));
 501
 502                 /* Encrypt the new session key with the old one */
 503                 encrypted_session_key = data_blob_talloc(ntlmssp_state,
 504                                                          client_session_key, sizeof(client_session_key));
 505                 dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
 506                 arcfour_crypt(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
 507                 dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
 508
 509                 /* Mark the new session key as the 'real' session key */
 510                 session_key = data_blob_talloc(mem_ctx, client_session_key, sizeof(client_session_key));
 511         }
 512
 513         /* this generates the actual auth packet */
 514         nt_status = msrpc_gen(mem_ctx,
 515                        out, auth_gen_string,
 516                        "NTLMSSP",
 517                        NTLMSSP_AUTH,
 518                        lm_response.data, lm_response.length,
 519                        nt_response.data, nt_response.length,
 520                        domain,
 521                        user,
 522                        workstation,
 523                        encrypted_session_key.data, encrypted_session_key.length,
 524                        ntlmssp_state->neg_flags,
 525                        version_blob.data, version_blob.length);
 526         if (!NT_STATUS_IS_OK(nt_status)) {
 527                 talloc_free(mem_ctx);
 528                 return nt_status;
 529         }
 530
 531 done:
 532         ntlmssp_state->session_key = session_key;
 533         talloc_steal(ntlmssp_state, session_key.data);
 534
 535         DEBUG(3, ("NTLMSSP: Set final flags:\n"));
 536         debug_ntlmssp_flags(ntlmssp_state->neg_flags);
 537
 538         talloc_steal(out_mem_ctx, out->data);
 539
 540         ntlmssp_state->expected_state = NTLMSSP_DONE;
 541
 542         if (gensec_ntlmssp_have_feature(gensec_security, GENSEC_FEATURE_SIGN)) {
 543                 nt_status = ntlmssp_sign_init(ntlmssp_state);
 544                 if (!NT_STATUS_IS_OK(nt_status)) {
 545                         DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n",
 546                                   nt_errstr(nt_status)));
 547                         talloc_free(mem_ctx);
 548                         return nt_status;
 549                 }
 550         }
 551
 552         talloc_free(mem_ctx);
 553         return NT_STATUS_OK;
 554 }
 555
 556 NTSTATUS gensec_ntlmssp_client_start(struct gensec_security *gensec_security)
 557 {
 558         struct gensec_ntlmssp_context *gensec_ntlmssp;
 559         struct ntlmssp_state *ntlmssp_state;
 560         NTSTATUS nt_status;
 561
 562         nt_status = gensec_ntlmssp_start(gensec_security);
 563         NT_STATUS_NOT_OK_RETURN(nt_status);
 564
 565         gensec_ntlmssp =
 566                 talloc_get_type_abort(gensec_security->private_data,
 567                                       struct gensec_ntlmssp_context);
 568
 569         ntlmssp_state = talloc_zero(gensec_ntlmssp,
 570                                     struct ntlmssp_state);
 571         if (!ntlmssp_state) {
 572                 return NT_STATUS_NO_MEMORY;
 573         }
 574
 575         gensec_ntlmssp->ntlmssp_state = ntlmssp_state;
 576
 577         ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
 578
 579         ntlmssp_state->role = NTLMSSP_CLIENT;
 580
 581         ntlmssp_state->client.netbios_domain = lpcfg_workgroup(gensec_security->settings->lp_ctx);
 582         ntlmssp_state->client.netbios_name = cli_credentials_get_workstation(gensec_security->credentials);
 583
 584         ntlmssp_state->unicode = gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "unicode", true);
 585
 586         ntlmssp_state->use_nt_response = gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "send_nt_reponse", true);
 587
 588         ntlmssp_state->allow_lm_response = lpcfg_client_lanman_auth(gensec_security->settings->lp_ctx);
 589
 590         ntlmssp_state->allow_lm_key = (ntlmssp_state->allow_lm_response
 591                                               && (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "allow_lm_key", false)
 592                                                   || gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "lm_key", false)));
 593
 594         ntlmssp_state->use_ntlmv2 = lpcfg_client_ntlmv2_auth(gensec_security->settings->lp_ctx);
 595
 596         ntlmssp_state->expected_state = NTLMSSP_INITIAL;
 597
 598         ntlmssp_state->neg_flags =
 599                 NTLMSSP_NEGOTIATE_NTLM |
 600                 NTLMSSP_NEGOTIATE_VERSION |
 601                 NTLMSSP_REQUEST_TARGET;
 602
 603         if (ntlmssp_state->unicode) {
 604                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
 605         } else {
 606                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
 607         }
 608
 609         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "128bit", true)) {
 610                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
 611         }
 612
 613         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "56bit", false)) {
 614                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
 615         }
 616
 617         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "lm_key", false)) {
 618                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
 619         }
 620
 621         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "keyexchange", true)) {
 622                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
 623         }
 624
 625         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "alwayssign", true)) {
 626                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
 627         }
 628
 629         if (gensec_setting_bool(gensec_security->settings, "ntlmssp_client", "ntlm2", true)) {
 630                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
 631         } else {
 632                 /* apparently we can't do ntlmv2 if we don't do ntlm2 */
 633                 ntlmssp_state->use_ntlmv2 = false;
 634         }
 635
 636         if (ntlmssp_state->use_ntlmv2) {
 637                 ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_NTLM2;
 638                 ntlmssp_state->allow_lm_response = false;
 639                 ntlmssp_state->allow_lm_key = false;
 640         }
 641
 642         if (ntlmssp_state->allow_lm_key) {
 643                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
 644         }
 645
 646         if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
 647                 /*
 648                  * We need to set this to allow a later SetPassword
 649                  * via the SAMR pipe to succeed. Strange.... We could
 650                  * also add  NTLMSSP_NEGOTIATE_SEAL here. JRA.
 651                  *
 652                  * Without this, Windows will not create the master key
 653                  * that it thinks is only used for NTLMSSP signing and
 654                  * sealing.  (It is actually pulled out and used directly)
 655                  */
 656                 ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
 657         }
 658         if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
 659                 ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
 660
 661                 if (gensec_security->want_features & GENSEC_FEATURE_LDAP_STYLE) {
 662                         /*
 663                          * We need to handle NTLMSSP_NEGOTIATE_SIGN as
 664                          * NTLMSSP_NEGOTIATE_SEAL if GENSEC_FEATURE_LDAP_STYLE
 665                          * is requested.
 666                          */
 667                         ntlmssp_state->force_wrap_seal = true;
 668                         /*
 669                          * We want also work against old Samba servers
 670                          * which didn't had GENSEC_FEATURE_LDAP_STYLE
 671                          * we negotiate SEAL too. We may remove this
 672                          * in a few years. As all servers should have
 673                          * GENSEC_FEATURE_LDAP_STYLE by then.
 674                          */
 675                         ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SEAL;
 676                 }
 677         }
 678         if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
 679                 ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SIGN;
 680                 ntlmssp_state->required_flags |= NTLMSSP_NEGOTIATE_SEAL;
 681         }
 682         if (gensec_security->want_features & GENSEC_FEATURE_NTLM_CCACHE) {
 683                 ntlmssp_state->use_ccache = true;
 684         }
 685
 686         ntlmssp_state->neg_flags |= ntlmssp_state->required_flags;
 687         ntlmssp_state->conf_flags = ntlmssp_state->neg_flags;
 688
 689         return NT_STATUS_OK;
 690 }
 691
 692 NTSTATUS gensec_ntlmssp_resume_ccache_start(struct gensec_security *gensec_security)
 693 {
 694         struct gensec_ntlmssp_context *gensec_ntlmssp = NULL;
 695         NTSTATUS status;
 696
 697         status = gensec_ntlmssp_client_start(gensec_security);
 698         if (!NT_STATUS_IS_OK(status)) {
 699                 return status;
 700         }
 701
 702         gensec_ntlmssp = talloc_get_type_abort(gensec_security->private_data,
 703                                                struct gensec_ntlmssp_context);
 704         gensec_ntlmssp->ntlmssp_state->use_ccache = false;
 705         gensec_ntlmssp->ntlmssp_state->resume_ccache = true;
 706         gensec_ntlmssp->ntlmssp_state->expected_state = NTLMSSP_NEGOTIATE;
 707
 708         return NT_STATUS_OK;
 709 }