source4/auth/ntlm/auth_winbind.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind authentication mechnism
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Andrew Bartlett 2001 - 2002
   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 #include "includes.h"
  25 #include "auth/auth.h"
  26 #include "auth/ntlm/auth_proto.h"
  27 #include "auth/auth_sam_reply.h"
  28 #include "nsswitch/winbind_client.h"
  29 #include "librpc/gen_ndr/ndr_netlogon.h"
  30 #include "librpc/gen_ndr/ndr_winbind.h"
  31 #include "lib/messaging/irpc.h"
  32 #include "param/param.h"
  33 #include "nsswitch/libwbclient/wbclient.h"
  34 #include "libcli/security/dom_sid.h"
  35
  36 static NTSTATUS get_info3_from_ndr(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, struct winbindd_response *response, struct netr_SamInfo3 *info3)
  37 {
  38         size_t len = response->length - sizeof(struct winbindd_response);
  39         if (len > 4) {
  40                 enum ndr_err_code ndr_err;
  41                 DATA_BLOB blob;
  42                 blob.length = len - 4;
  43                 blob.data = (uint8_t *)(((char *)response->extra_data.data) + 4);
  44
  45                 ndr_err = ndr_pull_struct_blob(&blob, mem_ctx,
  46                                iconv_convenience, info3,
  47                               (ndr_pull_flags_fn_t)ndr_pull_netr_SamInfo3);
  48                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  49                         return ndr_map_error2ntstatus(ndr_err);
  50                 }
  51
  52                 return NT_STATUS_OK;
  53         } else {
  54                 DEBUG(2, ("get_info3_from_ndr: No info3 struct found!\n"));
  55                 return NT_STATUS_UNSUCCESSFUL;
  56         }
  57 }
  58
  59 static NTSTATUS get_info3_from_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
  60                                                struct smb_iconv_convenience *ic,
  61                                                struct wbcAuthUserInfo *info,
  62                                                struct netr_SamInfo3 *info3)
  63 {
  64         int i, j;
  65         struct samr_RidWithAttribute *rids = NULL;
  66
  67         info3->base.last_logon = info->logon_time;
  68         info3->base.last_logoff = info->logoff_time;
  69         info3->base.acct_expiry = info->kickoff_time;
  70         info3->base.last_password_change = info->pass_last_set_time;
  71         info3->base.allow_password_change = info->pass_can_change_time;
  72         info3->base.force_password_change = info->pass_must_change_time;
  73
  74         if (info->account_name != NULL) {
  75                 convert_string_talloc_convenience(mem_ctx, ic,
  76                                 CH_UNIX, CH_UTF16, info->account_name,
  77                                 strlen(info->account_name),
  78                                 discard_const(&info3->base.account_name.string),
  79                                 NULL, false);
  80         }
  81
  82         if (info->full_name != NULL) {
  83                 convert_string_talloc_convenience(mem_ctx, ic,
  84                                 CH_UNIX, CH_UTF16, info->full_name,
  85                                 strlen(info->full_name),
  86                                 discard_const(&info3->base.full_name.string),
  87                                 NULL, false);
  88         }
  89
  90         if (info->logon_script != NULL) {
  91                 convert_string_talloc_convenience(mem_ctx, ic,
  92                                 CH_UNIX, CH_UTF16, info->logon_script,
  93                                 strlen(info->logon_script),
  94                                 discard_const(&info3->base.logon_script.string),
  95                                 NULL, false);
  96         }
  97
  98         if (info->profile_path != NULL) {
  99                 convert_string_talloc_convenience(mem_ctx, ic,
 100                                 CH_UNIX, CH_UTF16, info->profile_path,
 101                                 strlen(info->profile_path),
 102                                 discard_const(&info3->base.profile_path.string),
 103                                 NULL, false);
 104         }
 105
 106         if (info->home_directory != NULL) {
 107                 convert_string_talloc_convenience(mem_ctx, ic,
 108                                 CH_UNIX, CH_UTF16, info->home_directory,
 109                                 strlen(info->home_directory),
 110                                 discard_const(&info3->base.home_directory.string),
 111                                 NULL, false);
 112         }
 113
 114         if (info->home_drive != NULL) {
 115                 convert_string_talloc_convenience(mem_ctx, ic,
 116                                 CH_UNIX, CH_UTF16, info->home_drive,
 117                                 strlen(info->home_drive),
 118                                 discard_const(&info3->base.home_drive.string),
 119                                 NULL, false);
 120         }
 121
 122         if (info->logon_server != NULL) {
 123                 convert_string_talloc_convenience(mem_ctx, ic,
 124                                 CH_UNIX, CH_UTF16, info->logon_server,
 125                                 strlen(info->logon_server),
 126                                 discard_const(&info3->base.logon_server.string),
 127                                 NULL, false);
 128         }
 129
 130         if (info->domain_name != NULL) {
 131                 convert_string_talloc_convenience(mem_ctx, ic,
 132                                 CH_UNIX, CH_UTF16, info->domain_name,
 133                                 strlen(info->domain_name),
 134                                 discard_const(&info3->base.domain.string),
 135                                 NULL, false);
 136         }
 137
 138         info3->base.logon_count = info->logon_count;
 139         info3->base.bad_password_count = info->bad_password_count;
 140         info3->base.user_flags = info->user_flags;
 141         memcpy(info3->base.key.key, info->user_session_key,
 142                sizeof(info3->base.key.key));
 143         memcpy(info3->base.LMSessKey.key, info->lm_session_key,
 144                sizeof(info3->base.LMSessKey.key));
 145         info3->base.acct_flags = info->acct_flags;
 146         memset(info3->base.unknown, 0, sizeof(info3->base.unknown));
 147
 148         if (info->num_sids < 2) {
 149                 return NT_STATUS_INVALID_PARAMETER;
 150         }
 151
 152         dom_sid_split_rid(mem_ctx, (struct dom_sid2 *) &info->sids[0].sid,
 153                           &info3->base.domain_sid,
 154                           &info3->base.rid);
 155         dom_sid_split_rid(mem_ctx, (struct dom_sid2 *) &info->sids[1].sid, NULL,
 156                           &info3->base.primary_gid);
 157
 158         /* We already handled the first two, now take care of the rest */
 159         info3->base.groups.count = info->num_sids - 2;
 160
 161         rids = talloc_array(mem_ctx, struct samr_RidWithAttribute,
 162                             info3->base.groups.count);
 163         NT_STATUS_HAVE_NO_MEMORY(rids);
 164
 165         for (i = 2, j = 0; i < info->num_sids; ++i, ++j) {
 166                 rids[j].attributes = info->sids[i].attributes;
 167                 dom_sid_split_rid(mem_ctx,
 168                                   (struct dom_sid2 *) &info->sids[i].sid,
 169                                   NULL, &rids[j].rid);
 170         }
 171         info3->base.groups.rids = rids;
 172
 173         return NT_STATUS_OK;
 174 }
 175
 176
 177 static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
 178                                    TALLOC_CTX *mem_ctx,
 179                                    const struct auth_usersupplied_info *user_info)
 180 {
 181         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
 182                 return NT_STATUS_NOT_IMPLEMENTED;
 183         }
 184
 185         /* TODO: maybe limit the user scope to remote users only */
 186         return NT_STATUS_OK;
 187 }
 188
 189 /*
 190  Authenticate a user with a challenge/response
 191  using the samba3 winbind protocol
 192 */
 193 static NTSTATUS winbind_check_password_samba3(struct auth_method_context *ctx,
 194                                               TALLOC_CTX *mem_ctx,
 195                                               const struct auth_usersupplied_info *user_info,
 196                                               struct auth_serversupplied_info **server_info)
 197 {
 198         struct winbindd_request request;
 199         struct winbindd_response response;
 200         NSS_STATUS result;
 201         NTSTATUS nt_status;
 202         struct netr_SamInfo3 info3;
 203
 204         /* Send off request */
 205         const struct auth_usersupplied_info *user_info_temp;
 206         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 207                                       AUTH_PASSWORD_RESPONSE,
 208                                       user_info, &user_info_temp);
 209         if (!NT_STATUS_IS_OK(nt_status)) {
 210                 return nt_status;
 211         }
 212         user_info = user_info_temp;
 213
 214         ZERO_STRUCT(request);
 215         ZERO_STRUCT(response);
 216         request.flags = WBFLAG_PAM_INFO3_NDR;
 217
 218         request.data.auth_crap.logon_parameters = user_info->logon_parameters;
 219
 220         safe_strcpy(request.data.auth_crap.user,
 221                        user_info->client.account_name, sizeof(fstring));
 222         safe_strcpy(request.data.auth_crap.domain,
 223                        user_info->client.domain_name, sizeof(fstring));
 224         safe_strcpy(request.data.auth_crap.workstation,
 225                        user_info->workstation_name, sizeof(fstring));
 226
 227         memcpy(request.data.auth_crap.chal, ctx->auth_ctx->challenge.data.data, sizeof(request.data.auth_crap.chal));
 228
 229         request.data.auth_crap.lm_resp_len = MIN(user_info->password.response.lanman.length,
 230                                                  sizeof(request.data.auth_crap.lm_resp));
 231         request.data.auth_crap.nt_resp_len = MIN(user_info->password.response.nt.length,
 232                                                  sizeof(request.data.auth_crap.nt_resp));
 233
 234         memcpy(request.data.auth_crap.lm_resp, user_info->password.response.lanman.data,
 235                request.data.auth_crap.lm_resp_len);
 236         memcpy(request.data.auth_crap.nt_resp, user_info->password.response.nt.data,
 237                request.data.auth_crap.nt_resp_len);
 238
 239         result = winbindd_request_response(WINBINDD_PAM_AUTH_CRAP, &request, &response);
 240
 241         nt_status = NT_STATUS(response.data.auth.nt_status);
 242         NT_STATUS_NOT_OK_RETURN(nt_status);
 243
 244         if (result == NSS_STATUS_SUCCESS && response.extra_data.data) {
 245                 union netr_Validation validation;
 246
 247                 nt_status = get_info3_from_ndr(mem_ctx, lp_iconv_convenience(ctx->auth_ctx->lp_ctx), &response, &info3);
 248                 SAFE_FREE(response.extra_data.data);
 249                 NT_STATUS_NOT_OK_RETURN(nt_status);
 250
 251                 validation.sam3 = &info3;
 252                 nt_status = make_server_info_netlogon_validation(mem_ctx,
 253                                                                  user_info->client.account_name,
 254                                                                  3, &validation,
 255                                                                  server_info);
 256                 return nt_status;
 257         } else if (result == NSS_STATUS_SUCCESS && !response.extra_data.data) {
 258                 DEBUG(0, ("Winbindd authenticated the user [%s]\\[%s], "
 259                           "but did not include the required info3 reply!\n",
 260                           user_info->client.domain_name, user_info->client.account_name));
 261                 return NT_STATUS_INSUFFICIENT_LOGON_INFO;
 262         } else if (NT_STATUS_IS_OK(nt_status)) {
 263                 DEBUG(1, ("Winbindd authentication for [%s]\\[%s] failed, "
 264                           "but no error code is available!\n",
 265                           user_info->client.domain_name, user_info->client.account_name));
 266                 return NT_STATUS_NO_LOGON_SERVERS;
 267         }
 268
 269         return nt_status;
 270 }
 271
 272 struct winbind_check_password_state {
 273         struct winbind_SamLogon req;
 274 };
 275
 276 /*
 277  Authenticate a user with a challenge/response
 278  using IRPC to the winbind task
 279 */
 280 static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
 281                                        TALLOC_CTX *mem_ctx,
 282                                        const struct auth_usersupplied_info *user_info,
 283                                        struct auth_serversupplied_info **server_info)
 284 {
 285         NTSTATUS status;
 286         struct server_id *winbind_servers;
 287         struct winbind_check_password_state *s;
 288         const struct auth_usersupplied_info *user_info_new;
 289         struct netr_IdentityInfo *identity_info;
 290
 291         s = talloc(mem_ctx, struct winbind_check_password_state);
 292         NT_STATUS_HAVE_NO_MEMORY(s);
 293
 294         winbind_servers = irpc_servers_byname(ctx->auth_ctx->msg_ctx, s, "winbind_server");
 295         if ((winbind_servers == NULL) || (winbind_servers[0].id == 0)) {
 296                 DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, "
 297                           "no winbind_server running!\n",
 298                           user_info->client.domain_name, user_info->client.account_name));
 299                 return NT_STATUS_NO_LOGON_SERVERS;
 300         }
 301
 302         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
 303                 struct netr_PasswordInfo *password_info;
 304
 305                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_HASH,
 306                                            user_info, &user_info_new);
 307                 NT_STATUS_NOT_OK_RETURN(status);
 308                 user_info = user_info_new;
 309
 310                 password_info = talloc(s, struct netr_PasswordInfo);
 311                 NT_STATUS_HAVE_NO_MEMORY(password_info);
 312
 313                 password_info->lmpassword = *user_info->password.hash.lanman;
 314                 password_info->ntpassword = *user_info->password.hash.nt;
 315
 316                 identity_info = &password_info->identity_info;
 317                 s->req.in.logon_level   = 1;
 318                 s->req.in.logon.password= password_info;
 319         } else {
 320                 struct netr_NetworkInfo *network_info;
 321                 const uint8_t *challenge;
 322
 323                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
 324                                            user_info, &user_info_new);
 325                 NT_STATUS_NOT_OK_RETURN(status);
 326                 user_info = user_info_new;
 327
 328                 network_info = talloc(s, struct netr_NetworkInfo);
 329                 NT_STATUS_HAVE_NO_MEMORY(network_info);
 330
 331                 status = auth_get_challenge(ctx->auth_ctx, &challenge);
 332                 NT_STATUS_NOT_OK_RETURN(status);
 333
 334                 memcpy(network_info->challenge, challenge, sizeof(network_info->challenge));
 335
 336                 network_info->nt.length = user_info->password.response.nt.length;
 337                 network_info->nt.data   = user_info->password.response.nt.data;
 338
 339                 network_info->lm.length = user_info->password.response.lanman.length;
 340                 network_info->lm.data   = user_info->password.response.lanman.data;
 341
 342                 identity_info = &network_info->identity_info;
 343                 s->req.in.logon_level   = 2;
 344                 s->req.in.logon.network = network_info;
 345         }
 346
 347         identity_info->domain_name.string       = user_info->client.domain_name;
 348         identity_info->parameter_control        = user_info->logon_parameters; /* see MSV1_0_* */
 349         identity_info->logon_id_low             = 0;
 350         identity_info->logon_id_high            = 0;
 351         identity_info->account_name.string      = user_info->client.account_name;
 352         identity_info->workstation.string       = user_info->workstation_name;
 353
 354         s->req.in.validation_level      = 3;
 355
 356         status = IRPC_CALL(ctx->auth_ctx->msg_ctx, winbind_servers[0],
 357                            winbind, WINBIND_SAMLOGON,
 358                            &s->req, s);
 359         NT_STATUS_NOT_OK_RETURN(status);
 360
 361         status = make_server_info_netlogon_validation(mem_ctx,
 362                                                       user_info->client.account_name,
 363                                                       s->req.in.validation_level,
 364                                                       &s->req.out.validation,
 365                                                       server_info);
 366         NT_STATUS_NOT_OK_RETURN(status);
 367
 368         return NT_STATUS_OK;
 369 }
 370
 371 /*
 372  Authenticate a user with a challenge/response
 373  using the samba3 winbind protocol via libwbclient
 374 */
 375 static NTSTATUS winbind_check_password_wbclient(struct auth_method_context *ctx,
 376                                                 TALLOC_CTX *mem_ctx,
 377                                                 const struct auth_usersupplied_info *user_info,
 378                                                 struct auth_serversupplied_info **server_info)
 379 {
 380         struct wbcAuthUserParams params;
 381         struct wbcAuthUserInfo *info = NULL;
 382         struct wbcAuthErrorInfo *err = NULL;
 383         wbcErr wbc_status;
 384         NTSTATUS nt_status;
 385         struct netr_SamInfo3 info3;
 386         union netr_Validation validation;
 387
 388
 389         /* Send off request */
 390         const struct auth_usersupplied_info *user_info_temp;
 391         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 392                                       AUTH_PASSWORD_RESPONSE,
 393                                       user_info, &user_info_temp);
 394         if (!NT_STATUS_IS_OK(nt_status)) {
 395                 return nt_status;
 396         }
 397         user_info = user_info_temp;
 398
 399         ZERO_STRUCT(params);
 400         ZERO_STRUCT(info3);
 401         /*params.flags = WBFLAG_PAM_INFO3_NDR;*/
 402
 403         params.parameter_control = user_info->logon_parameters;
 404         params.parameter_control |= WBC_MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT |
 405                                     WBC_MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT;
 406         params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
 407
 408         params.account_name     = user_info->client.account_name;
 409         params.domain_name      = user_info->client.domain_name;
 410         params.workstation_name = user_info->workstation_name;
 411
 412         d_fprintf(stderr, "looking up %s@%s logging in from %s\n",
 413                   params.account_name, params.domain_name,
 414                   params.workstation_name);
 415
 416         memcpy(params.password.response.challenge,
 417                ctx->auth_ctx->challenge.data.data,
 418                sizeof(params.password.response.challenge));
 419
 420         params.password.response.lm_length =
 421                 user_info->password.response.lanman.length;
 422         params.password.response.nt_length =
 423                 user_info->password.response.nt.length;
 424
 425         params.password.response.lm_data =
 426                 user_info->password.response.lanman.data;
 427         params.password.response.nt_data =
 428                 user_info->password.response.nt.data;
 429
 430         wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
 431         if (!WBC_ERROR_IS_OK(wbc_status)) {
 432                 DEBUG(1, ("error was %s (0x%08x)\nerror message was '%s'\n",
 433                       err->nt_string, err->nt_status, err->display_string));
 434
 435                 nt_status = NT_STATUS(err->nt_status);
 436                 wbcFreeMemory(err);
 437                 NT_STATUS_NOT_OK_RETURN(nt_status);
 438         }
 439         nt_status = get_info3_from_wbcAuthUserInfo(mem_ctx,
 440                                 lp_iconv_convenience(ctx->auth_ctx->lp_ctx),
 441                                 info, &info3);
 442         wbcFreeMemory(info);
 443         NT_STATUS_NOT_OK_RETURN(nt_status);
 444
 445         validation.sam3 = &info3;
 446         nt_status = make_server_info_netlogon_validation(mem_ctx,
 447                                         user_info->client.account_name,
 448                                         3, &validation, server_info);
 449         return nt_status;
 450
 451 }
 452
 453 static const struct auth_operations winbind_samba3_ops = {
 454         .name           = "winbind_samba3",
 455         .get_challenge  = auth_get_challenge_not_implemented,
 456         .want_check     = winbind_want_check,
 457         .check_password = winbind_check_password_samba3
 458 };
 459
 460 static const struct auth_operations winbind_ops = {
 461         .name           = "winbind",
 462         .get_challenge  = auth_get_challenge_not_implemented,
 463         .want_check     = winbind_want_check,
 464         .check_password = winbind_check_password
 465 };
 466
 467 static const struct auth_operations winbind_wbclient_ops = {
 468         .name           = "winbind_wbclient",
 469         .get_challenge  = auth_get_challenge_not_implemented,
 470         .want_check     = winbind_want_check,
 471         .check_password = winbind_check_password_wbclient
 472 };
 473
 474 _PUBLIC_ NTSTATUS auth_winbind_init(void)
 475 {
 476         NTSTATUS ret;
 477
 478         ret = auth_register(&winbind_samba3_ops);
 479         if (!NT_STATUS_IS_OK(ret)) {
 480                 DEBUG(0,("Failed to register 'winbind_samba3' auth backend!\n"));
 481                 return ret;
 482         }
 483
 484         ret = auth_register(&winbind_ops);
 485         if (!NT_STATUS_IS_OK(ret)) {
 486                 DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
 487                 return ret;
 488         }
 489
 490         ret = auth_register(&winbind_wbclient_ops);
 491         if (!NT_STATUS_IS_OK(ret)) {
 492                 DEBUG(0,("Failed to register 'winbind_wbclient' auth backend!\n"));
 493                 return ret;
 494         }
 495
 496         return NT_STATUS_OK;
 497 }