source/rpc_client/cli_netlogon.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NT Domain Authentication SMB / MSRPC client
   4    Copyright (C) Andrew Tridgell 1992-2000
   5    Copyright (C) Jeremy Allison                    1998.
   6    Largely re-written by Jeremy Allison (C)        2005.
   7    Copyright (C) Guenther Deschner                 2008.
   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
  25 /****************************************************************************
  26  Wrapper function that uses the auth and auth2 calls to set up a NETLOGON
  27  credentials chain. Stores the credentials in the struct dcinfo in the
  28  netlogon pipe struct.
  29 ****************************************************************************/
  30
  31 NTSTATUS rpccli_netlogon_setup_creds(struct rpc_pipe_client *cli,
  32                                      const char *server_name,
  33                                      const char *domain,
  34                                      const char *clnt_name,
  35                                      const char *machine_account,
  36                                      const unsigned char machine_pwd[16],
  37                                      enum netr_SchannelType sec_chan_type,
  38                                      uint32_t *neg_flags_inout)
  39 {
  40         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
  41         struct netr_Credential clnt_chal_send;
  42         struct netr_Credential srv_chal_recv;
  43         struct dcinfo *dc;
  44         bool retried = false;
  45
  46         SMB_ASSERT(ndr_syntax_id_equal(&cli->abstract_syntax,
  47                                        &ndr_table_netlogon.syntax_id));
  48
  49         TALLOC_FREE(cli->dc);
  50         cli->dc = talloc_zero(cli, struct dcinfo);
  51         if (cli->dc == NULL) {
  52                 return NT_STATUS_NO_MEMORY;
  53         }
  54         dc = cli->dc;
  55
  56         /* Store the machine account password we're going to use. */
  57         memcpy(dc->mach_pw, machine_pwd, 16);
  58
  59         fstrcpy(dc->remote_machine, "\\\\");
  60         fstrcat(dc->remote_machine, server_name);
  61
  62         fstrcpy(dc->domain, domain);
  63
  64         fstr_sprintf( dc->mach_acct, "%s$", machine_account);
  65
  66  again:
  67         /* Create the client challenge. */
  68         generate_random_buffer(clnt_chal_send.data, 8);
  69
  70         /* Get the server challenge. */
  71         result = rpccli_netr_ServerReqChallenge(cli, talloc_tos(),
  72                                                 dc->remote_machine,
  73                                                 clnt_name,
  74                                                 &clnt_chal_send,
  75                                                 &srv_chal_recv);
  76         if (!NT_STATUS_IS_OK(result)) {
  77                 return result;
  78         }
  79
  80         /* Calculate the session key and client credentials */
  81         creds_client_init(*neg_flags_inout,
  82                         dc,
  83                         &clnt_chal_send,
  84                         &srv_chal_recv,
  85                         machine_pwd,
  86                         &clnt_chal_send);
  87
  88         /*
  89          * Send client auth-2 challenge and receive server repy.
  90          */
  91
  92         result = rpccli_netr_ServerAuthenticate2(cli, talloc_tos(),
  93                                                  dc->remote_machine,
  94                                                  dc->mach_acct,
  95                                                  sec_chan_type,
  96                                                  clnt_name,
  97                                                  &clnt_chal_send, /* input. */
  98                                                  &srv_chal_recv, /* output. */
  99                                                  neg_flags_inout);
 100
 101         /* we might be talking to NT4, so let's downgrade in that case and retry
 102          * with the returned neg_flags - gd */
 103
 104         if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) && !retried) {
 105                 retried = true;
 106                 goto again;
 107         }
 108
 109         if (!NT_STATUS_IS_OK(result)) {
 110                 return result;
 111         }
 112
 113         /*
 114          * Check the returned value using the initial
 115          * server received challenge.
 116          */
 117
 118         if (!netlogon_creds_client_check(dc, &srv_chal_recv)) {
 119                 /*
 120                  * Server replied with bad credential. Fail.
 121                  */
 122                 DEBUG(0,("rpccli_netlogon_setup_creds: server %s "
 123                         "replied with bad credential\n",
 124                         cli->desthost ));
 125                 return NT_STATUS_ACCESS_DENIED;
 126         }
 127
 128         DEBUG(5,("rpccli_netlogon_setup_creds: server %s credential "
 129                 "chain established.\n",
 130                 cli->desthost ));
 131
 132         return NT_STATUS_OK;
 133 }
 134
 135 /* Logon domain user */
 136
 137 NTSTATUS rpccli_netlogon_sam_logon(struct rpc_pipe_client *cli,
 138                                    TALLOC_CTX *mem_ctx,
 139                                    uint32 logon_parameters,
 140                                    const char *domain,
 141                                    const char *username,
 142                                    const char *password,
 143                                    const char *workstation,
 144                                    int logon_type)
 145 {
 146         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 147         struct netr_Authenticator clnt_creds;
 148         struct netr_Authenticator ret_creds;
 149         union netr_LogonInfo *logon;
 150         union netr_Validation validation;
 151         uint8_t authoritative;
 152         int validation_level = 3;
 153         fstring clnt_name_slash;
 154         uint8 zeros[16];
 155
 156         ZERO_STRUCT(ret_creds);
 157         ZERO_STRUCT(zeros);
 158
 159         logon = TALLOC_ZERO_P(mem_ctx, union netr_LogonInfo);
 160         if (!logon) {
 161                 return NT_STATUS_NO_MEMORY;
 162         }
 163
 164         if (workstation) {
 165                 fstr_sprintf( clnt_name_slash, "\\\\%s", workstation );
 166         } else {
 167                 fstr_sprintf( clnt_name_slash, "\\\\%s", global_myname() );
 168         }
 169
 170         /* Initialise input parameters */
 171
 172         netlogon_creds_client_step(cli->dc, &clnt_creds);
 173
 174         switch (logon_type) {
 175         case INTERACTIVE_LOGON_TYPE: {
 176
 177                 struct netr_PasswordInfo *password_info;
 178
 179                 struct samr_Password lmpassword;
 180                 struct samr_Password ntpassword;
 181
 182                 unsigned char lm_owf_user_pwd[16], nt_owf_user_pwd[16];
 183
 184                 unsigned char lm_owf[16];
 185                 unsigned char nt_owf[16];
 186                 unsigned char key[16];
 187
 188                 password_info = TALLOC_ZERO_P(mem_ctx, struct netr_PasswordInfo);
 189                 if (!password_info) {
 190                         return NT_STATUS_NO_MEMORY;
 191                 }
 192
 193                 nt_lm_owf_gen(password, nt_owf_user_pwd, lm_owf_user_pwd);
 194
 195 #ifdef DEBUG_PASSWORD
 196                 DEBUG(100,("lm cypher:"));
 197                 dump_data(100, lm_owf_user_pwd, 16);
 198
 199                 DEBUG(100,("nt cypher:"));
 200                 dump_data(100, nt_owf_user_pwd, 16);
 201 #endif
 202                 memset(key, 0, 16);
 203                 memcpy(key, cli->dc->sess_key, 8);
 204
 205                 memcpy(lm_owf, lm_owf_user_pwd, 16);
 206                 SamOEMhash(lm_owf, key, 16);
 207                 memcpy(nt_owf, nt_owf_user_pwd, 16);
 208                 SamOEMhash(nt_owf, key, 16);
 209
 210 #ifdef DEBUG_PASSWORD
 211                 DEBUG(100,("encrypt of lm owf password:"));
 212                 dump_data(100, lm_owf, 16);
 213
 214                 DEBUG(100,("encrypt of nt owf password:"));
 215                 dump_data(100, nt_owf, 16);
 216 #endif
 217                 memcpy(lmpassword.hash, lm_owf, 16);
 218                 memcpy(ntpassword.hash, nt_owf, 16);
 219
 220                 init_netr_PasswordInfo(password_info,
 221                                        domain,
 222                                        logon_parameters,
 223                                        0xdead,
 224                                        0xbeef,
 225                                        username,
 226                                        clnt_name_slash,
 227                                        lmpassword,
 228                                        ntpassword);
 229
 230                 logon->password = password_info;
 231
 232                 break;
 233         }
 234         case NET_LOGON_TYPE: {
 235                 struct netr_NetworkInfo *network_info;
 236                 uint8 chal[8];
 237                 unsigned char local_lm_response[24];
 238                 unsigned char local_nt_response[24];
 239                 struct netr_ChallengeResponse lm;
 240                 struct netr_ChallengeResponse nt;
 241
 242                 ZERO_STRUCT(lm);
 243                 ZERO_STRUCT(nt);
 244
 245                 network_info = TALLOC_ZERO_P(mem_ctx, struct netr_NetworkInfo);
 246                 if (!network_info) {
 247                         return NT_STATUS_NO_MEMORY;
 248                 }
 249
 250                 generate_random_buffer(chal, 8);
 251
 252                 SMBencrypt(password, chal, local_lm_response);
 253                 SMBNTencrypt(password, chal, local_nt_response);
 254
 255                 lm.length = 24;
 256                 lm.data = local_lm_response;
 257
 258                 nt.length = 24;
 259                 nt.data = local_nt_response;
 260
 261                 init_netr_NetworkInfo(network_info,
 262                                       domain,
 263                                       logon_parameters,
 264                                       0xdead,
 265                                       0xbeef,
 266                                       username,
 267                                       clnt_name_slash,
 268                                       chal,
 269                                       nt,
 270                                       lm);
 271
 272                 logon->network = network_info;
 273
 274                 break;
 275         }
 276         default:
 277                 DEBUG(0, ("switch value %d not supported\n",
 278                         logon_type));
 279                 return NT_STATUS_INVALID_INFO_CLASS;
 280         }
 281
 282         result = rpccli_netr_LogonSamLogon(cli, mem_ctx,
 283                                            cli->dc->remote_machine,
 284                                            global_myname(),
 285                                            &clnt_creds,
 286                                            &ret_creds,
 287                                            logon_type,
 288                                            logon,
 289                                            validation_level,
 290                                            &validation,
 291                                            &authoritative);
 292
 293         if (memcmp(zeros, &ret_creds.cred.data, sizeof(ret_creds.cred.data)) != 0) {
 294                 /* Check returned credentials if present. */
 295                 if (!netlogon_creds_client_check(cli->dc, &ret_creds.cred)) {
 296                         DEBUG(0,("rpccli_netlogon_sam_logon: credentials chain check failed\n"));
 297                         return NT_STATUS_ACCESS_DENIED;
 298                 }
 299         }
 300
 301         return result;
 302 }
 303
 304
 305 /**
 306  * Logon domain user with an 'network' SAM logon
 307  *
 308  * @param info3 Pointer to a NET_USER_INFO_3 already allocated by the caller.
 309  **/
 310
 311 NTSTATUS rpccli_netlogon_sam_network_logon(struct rpc_pipe_client *cli,
 312                                            TALLOC_CTX *mem_ctx,
 313                                            uint32 logon_parameters,
 314                                            const char *server,
 315                                            const char *username,
 316                                            const char *domain,
 317                                            const char *workstation,
 318                                            const uint8 chal[8],
 319                                            DATA_BLOB lm_response,
 320                                            DATA_BLOB nt_response,
 321                                            struct netr_SamInfo3 **info3)
 322 {
 323         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 324         int validation_level = 3;
 325         const char *workstation_name_slash;
 326         const char *server_name_slash;
 327         uint8 zeros[16];
 328         struct netr_Authenticator clnt_creds;
 329         struct netr_Authenticator ret_creds;
 330         union netr_LogonInfo *logon = NULL;
 331         struct netr_NetworkInfo *network_info;
 332         uint8_t authoritative;
 333         union netr_Validation validation;
 334         struct netr_ChallengeResponse lm;
 335         struct netr_ChallengeResponse nt;
 336
 337         *info3 = NULL;
 338
 339         ZERO_STRUCT(zeros);
 340         ZERO_STRUCT(ret_creds);
 341
 342         ZERO_STRUCT(lm);
 343         ZERO_STRUCT(nt);
 344
 345         logon = TALLOC_ZERO_P(mem_ctx, union netr_LogonInfo);
 346         if (!logon) {
 347                 return NT_STATUS_NO_MEMORY;
 348         }
 349
 350         network_info = TALLOC_ZERO_P(mem_ctx, struct netr_NetworkInfo);
 351         if (!network_info) {
 352                 return NT_STATUS_NO_MEMORY;
 353         }
 354
 355         netlogon_creds_client_step(cli->dc, &clnt_creds);
 356
 357         if (server[0] != '\\' && server[1] != '\\') {
 358                 server_name_slash = talloc_asprintf(mem_ctx, "\\\\%s", server);
 359         } else {
 360                 server_name_slash = server;
 361         }
 362
 363         if (workstation[0] != '\\' && workstation[1] != '\\') {
 364                 workstation_name_slash = talloc_asprintf(mem_ctx, "\\\\%s", workstation);
 365         } else {
 366                 workstation_name_slash = workstation;
 367         }
 368
 369         if (!workstation_name_slash || !server_name_slash) {
 370                 DEBUG(0, ("talloc_asprintf failed!\n"));
 371                 return NT_STATUS_NO_MEMORY;
 372         }
 373
 374         /* Initialise input parameters */
 375
 376         lm.data = lm_response.data;
 377         lm.length = lm_response.length;
 378         nt.data = nt_response.data;
 379         nt.length = nt_response.length;
 380
 381         init_netr_NetworkInfo(network_info,
 382                               domain,
 383                               logon_parameters,
 384                               0xdead,
 385                               0xbeef,
 386                               username,
 387                               workstation_name_slash,
 388                               (uint8_t *) chal,
 389                               nt,
 390                               lm);
 391
 392         logon->network = network_info;
 393
 394         /* Marshall data and send request */
 395
 396         result = rpccli_netr_LogonSamLogon(cli, mem_ctx,
 397                                            server_name_slash,
 398                                            global_myname(),
 399                                            &clnt_creds,
 400                                            &ret_creds,
 401                                            NET_LOGON_TYPE,
 402                                            logon,
 403                                            validation_level,
 404                                            &validation,
 405                                            &authoritative);
 406         if (!NT_STATUS_IS_OK(result)) {
 407                 return result;
 408         }
 409
 410         if (memcmp(zeros, validation.sam3->base.key.key, 16) != 0) {
 411                 SamOEMhash(validation.sam3->base.key.key,
 412                            cli->dc->sess_key, 16);
 413         }
 414
 415         if (memcmp(zeros, validation.sam3->base.LMSessKey.key, 8) != 0) {
 416                 SamOEMhash(validation.sam3->base.LMSessKey.key,
 417                            cli->dc->sess_key, 8);
 418         }
 419
 420         if (memcmp(zeros, ret_creds.cred.data, sizeof(ret_creds.cred.data)) != 0) {
 421                 /* Check returned credentials if present. */
 422                 if (!netlogon_creds_client_check(cli->dc, &ret_creds.cred)) {
 423                         DEBUG(0,("rpccli_netlogon_sam_network_logon: credentials chain check failed\n"));
 424                         return NT_STATUS_ACCESS_DENIED;
 425                 }
 426         }
 427
 428         *info3 = validation.sam3;
 429
 430         return result;
 431 }
 432
 433 NTSTATUS rpccli_netlogon_sam_network_logon_ex(struct rpc_pipe_client *cli,
 434                                               TALLOC_CTX *mem_ctx,
 435                                               uint32 logon_parameters,
 436                                               const char *server,
 437                                               const char *username,
 438                                               const char *domain,
 439                                               const char *workstation,
 440                                               const uint8 chal[8],
 441                                               DATA_BLOB lm_response,
 442                                               DATA_BLOB nt_response,
 443                                               struct netr_SamInfo3 **info3)
 444 {
 445         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 446         int validation_level = 3;
 447         const char *workstation_name_slash;
 448         const char *server_name_slash;
 449         uint8 zeros[16];
 450         union netr_LogonInfo *logon = NULL;
 451         struct netr_NetworkInfo *network_info;
 452         uint8_t authoritative;
 453         union netr_Validation validation;
 454         struct netr_ChallengeResponse lm;
 455         struct netr_ChallengeResponse nt;
 456         uint32_t flags = 0;
 457
 458         *info3 = NULL;
 459
 460         ZERO_STRUCT(zeros);
 461
 462         ZERO_STRUCT(lm);
 463         ZERO_STRUCT(nt);
 464
 465         logon = TALLOC_ZERO_P(mem_ctx, union netr_LogonInfo);
 466         if (!logon) {
 467                 return NT_STATUS_NO_MEMORY;
 468         }
 469
 470         network_info = TALLOC_ZERO_P(mem_ctx, struct netr_NetworkInfo);
 471         if (!network_info) {
 472                 return NT_STATUS_NO_MEMORY;
 473         }
 474
 475         if (server[0] != '\\' && server[1] != '\\') {
 476                 server_name_slash = talloc_asprintf(mem_ctx, "\\\\%s", server);
 477         } else {
 478                 server_name_slash = server;
 479         }
 480
 481         if (workstation[0] != '\\' && workstation[1] != '\\') {
 482                 workstation_name_slash = talloc_asprintf(mem_ctx, "\\\\%s", workstation);
 483         } else {
 484                 workstation_name_slash = workstation;
 485         }
 486
 487         if (!workstation_name_slash || !server_name_slash) {
 488                 DEBUG(0, ("talloc_asprintf failed!\n"));
 489                 return NT_STATUS_NO_MEMORY;
 490         }
 491
 492         /* Initialise input parameters */
 493
 494         lm.data = lm_response.data;
 495         lm.length = lm_response.length;
 496         nt.data = nt_response.data;
 497         nt.length = nt_response.length;
 498
 499         init_netr_NetworkInfo(network_info,
 500                               domain,
 501                               logon_parameters,
 502                               0xdead,
 503                               0xbeef,
 504                               username,
 505                               workstation_name_slash,
 506                               (uint8_t *) chal,
 507                               nt,
 508                               lm);
 509
 510         logon->network = network_info;
 511
 512         /* Marshall data and send request */
 513
 514         result = rpccli_netr_LogonSamLogonEx(cli, mem_ctx,
 515                                              server_name_slash,
 516                                              global_myname(),
 517                                              NET_LOGON_TYPE,
 518                                              logon,
 519                                              validation_level,
 520                                              &validation,
 521                                              &authoritative,
 522                                              &flags);
 523         if (!NT_STATUS_IS_OK(result)) {
 524                 return result;
 525         }
 526
 527         if (memcmp(zeros, validation.sam3->base.key.key, 16) != 0) {
 528                 SamOEMhash(validation.sam3->base.key.key,
 529                            cli->dc->sess_key, 16);
 530         }
 531
 532         if (memcmp(zeros, validation.sam3->base.LMSessKey.key, 8) != 0) {
 533                 SamOEMhash(validation.sam3->base.LMSessKey.key,
 534                            cli->dc->sess_key, 8);
 535         }
 536
 537         *info3 = validation.sam3;
 538
 539         return result;
 540 }