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 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                                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 wbcAuthUserInfo *info,
  61                                                struct netr_SamInfo3 *info3)
  62 {
  63         int i, j;
  64         struct samr_RidWithAttribute *rids = NULL;
  65
  66         info3->base.last_logon = info->logon_time;
  67         info3->base.last_logoff = info->logoff_time;
  68         info3->base.acct_expiry = info->kickoff_time;
  69         info3->base.last_password_change = info->pass_last_set_time;
  70         info3->base.allow_password_change = info->pass_can_change_time;
  71         info3->base.force_password_change = info->pass_must_change_time;
  72
  73         info3->base.account_name.string = talloc_strdup(mem_ctx,
  74                                                         info->account_name);
  75         info3->base.full_name.string = talloc_strdup(mem_ctx,
  76                                                      info->full_name);
  77         info3->base.logon_script.string = talloc_strdup(mem_ctx,
  78                                                         info->logon_script);
  79         info3->base.profile_path.string = talloc_strdup(mem_ctx,
  80                                                         info->profile_path);
  81         info3->base.home_directory.string = talloc_strdup(mem_ctx,
  82                                                           info->home_directory);
  83         info3->base.home_drive.string = talloc_strdup(mem_ctx,
  84                                                       info->home_drive);
  85         info3->base.logon_server.string = talloc_strdup(mem_ctx,
  86                                                         info->logon_server);
  87         info3->base.domain.string = talloc_strdup(mem_ctx,
  88                                                   info->domain_name);
  89
  90         info3->base.logon_count = info->logon_count;
  91         info3->base.bad_password_count = info->bad_password_count;
  92         info3->base.user_flags = info->user_flags;
  93         memcpy(info3->base.key.key, info->user_session_key,
  94                sizeof(info3->base.key.key));
  95         memcpy(info3->base.LMSessKey.key, info->lm_session_key,
  96                sizeof(info3->base.LMSessKey.key));
  97         info3->base.acct_flags = info->acct_flags;
  98         memset(info3->base.unknown, 0, sizeof(info3->base.unknown));
  99
 100         if (info->num_sids < 2) {
 101                 return NT_STATUS_INVALID_PARAMETER;
 102         }
 103
 104         dom_sid_split_rid(mem_ctx, (struct dom_sid2 *) &info->sids[0].sid,
 105                           &info3->base.domain_sid,
 106                           &info3->base.rid);
 107         dom_sid_split_rid(mem_ctx, (struct dom_sid2 *) &info->sids[1].sid, NULL,
 108                           &info3->base.primary_gid);
 109
 110         /* We already handled the first two, now take care of the rest */
 111         info3->base.groups.count = info->num_sids - 2;
 112
 113         rids = talloc_array(mem_ctx, struct samr_RidWithAttribute,
 114                             info3->base.groups.count);
 115         NT_STATUS_HAVE_NO_MEMORY(rids);
 116
 117         for (i = 2, j = 0; i < info->num_sids; ++i, ++j) {
 118                 rids[j].attributes = info->sids[i].attributes;
 119                 dom_sid_split_rid(mem_ctx,
 120                                   (struct dom_sid2 *) &info->sids[i].sid,
 121                                   NULL, &rids[j].rid);
 122         }
 123         info3->base.groups.rids = rids;
 124
 125         return NT_STATUS_OK;
 126 }
 127
 128
 129 static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
 130                                    TALLOC_CTX *mem_ctx,
 131                                    const struct auth_usersupplied_info *user_info)
 132 {
 133         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
 134                 return NT_STATUS_NOT_IMPLEMENTED;
 135         }
 136
 137         /* TODO: maybe limit the user scope to remote users only */
 138         return NT_STATUS_OK;
 139 }
 140
 141 /*
 142  Authenticate a user with a challenge/response
 143  using the samba3 winbind protocol
 144 */
 145 static NTSTATUS winbind_check_password_samba3(struct auth_method_context *ctx,
 146                                               TALLOC_CTX *mem_ctx,
 147                                               const struct auth_usersupplied_info *user_info,
 148                                               struct auth_serversupplied_info **server_info)
 149 {
 150         struct winbindd_request request;
 151         struct winbindd_response response;
 152         NSS_STATUS result;
 153         NTSTATUS nt_status;
 154         struct netr_SamInfo3 info3;
 155
 156         /* Send off request */
 157         const struct auth_usersupplied_info *user_info_temp;
 158         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 159                                       AUTH_PASSWORD_RESPONSE,
 160                                       user_info, &user_info_temp);
 161         if (!NT_STATUS_IS_OK(nt_status)) {
 162                 return nt_status;
 163         }
 164         user_info = user_info_temp;
 165
 166         ZERO_STRUCT(request);
 167         ZERO_STRUCT(response);
 168         request.flags = WBFLAG_PAM_INFO3_NDR;
 169
 170         request.data.auth_crap.logon_parameters = user_info->logon_parameters;
 171
 172         safe_strcpy(request.data.auth_crap.user,
 173                        user_info->client.account_name, sizeof(fstring));
 174         safe_strcpy(request.data.auth_crap.domain,
 175                        user_info->client.domain_name, sizeof(fstring));
 176         safe_strcpy(request.data.auth_crap.workstation,
 177                        user_info->workstation_name, sizeof(fstring));
 178
 179         memcpy(request.data.auth_crap.chal, ctx->auth_ctx->challenge.data.data, sizeof(request.data.auth_crap.chal));
 180
 181         request.data.auth_crap.lm_resp_len = MIN(user_info->password.response.lanman.length,
 182                                                  sizeof(request.data.auth_crap.lm_resp));
 183         request.data.auth_crap.nt_resp_len = MIN(user_info->password.response.nt.length,
 184                                                  sizeof(request.data.auth_crap.nt_resp));
 185
 186         memcpy(request.data.auth_crap.lm_resp, user_info->password.response.lanman.data,
 187                request.data.auth_crap.lm_resp_len);
 188         memcpy(request.data.auth_crap.nt_resp, user_info->password.response.nt.data,
 189                request.data.auth_crap.nt_resp_len);
 190
 191         result = winbindd_request_response(WINBINDD_PAM_AUTH_CRAP, &request, &response);
 192
 193         nt_status = NT_STATUS(response.data.auth.nt_status);
 194         NT_STATUS_NOT_OK_RETURN(nt_status);
 195
 196         if (result == NSS_STATUS_SUCCESS && response.extra_data.data) {
 197                 union netr_Validation validation;
 198
 199                 nt_status = get_info3_from_ndr(mem_ctx, &response, &info3);
 200                 SAFE_FREE(response.extra_data.data);
 201                 NT_STATUS_NOT_OK_RETURN(nt_status);
 202
 203                 validation.sam3 = &info3;
 204                 nt_status = make_server_info_netlogon_validation(mem_ctx,
 205                                                                  user_info->client.account_name,
 206                                                                  3, &validation,
 207                                                                  server_info);
 208                 return nt_status;
 209         } else if (result == NSS_STATUS_SUCCESS && !response.extra_data.data) {
 210                 DEBUG(0, ("Winbindd authenticated the user [%s]\\[%s], "
 211                           "but did not include the required info3 reply!\n",
 212                           user_info->client.domain_name, user_info->client.account_name));
 213                 return NT_STATUS_INSUFFICIENT_LOGON_INFO;
 214         } else if (NT_STATUS_IS_OK(nt_status)) {
 215                 DEBUG(1, ("Winbindd authentication for [%s]\\[%s] failed, "
 216                           "but no error code is available!\n",
 217                           user_info->client.domain_name, user_info->client.account_name));
 218                 return NT_STATUS_NO_LOGON_SERVERS;
 219         }
 220
 221         return nt_status;
 222 }
 223
 224 struct winbind_check_password_state {
 225         struct winbind_SamLogon req;
 226 };
 227
 228 /*
 229  Authenticate a user with a challenge/response
 230  using IRPC to the winbind task
 231 */
 232 static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
 233                                        TALLOC_CTX *mem_ctx,
 234                                        const struct auth_usersupplied_info *user_info,
 235                                        struct auth_serversupplied_info **server_info)
 236 {
 237         NTSTATUS status;
 238         struct server_id *winbind_servers;
 239         struct winbind_check_password_state *s;
 240         const struct auth_usersupplied_info *user_info_new;
 241         struct netr_IdentityInfo *identity_info;
 242
 243         s = talloc(mem_ctx, struct winbind_check_password_state);
 244         NT_STATUS_HAVE_NO_MEMORY(s);
 245
 246         winbind_servers = irpc_servers_byname(ctx->auth_ctx->msg_ctx, s, "winbind_server");
 247         if ((winbind_servers == NULL) || (winbind_servers[0].id == 0)) {
 248                 DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, "
 249                           "no winbind_server running!\n",
 250                           user_info->client.domain_name, user_info->client.account_name));
 251                 return NT_STATUS_NO_LOGON_SERVERS;
 252         }
 253
 254         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
 255                 struct netr_PasswordInfo *password_info;
 256
 257                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_HASH,
 258                                            user_info, &user_info_new);
 259                 NT_STATUS_NOT_OK_RETURN(status);
 260                 user_info = user_info_new;
 261
 262                 password_info = talloc(s, struct netr_PasswordInfo);
 263                 NT_STATUS_HAVE_NO_MEMORY(password_info);
 264
 265                 password_info->lmpassword = *user_info->password.hash.lanman;
 266                 password_info->ntpassword = *user_info->password.hash.nt;
 267
 268                 identity_info = &password_info->identity_info;
 269                 s->req.in.logon_level   = 1;
 270                 s->req.in.logon.password= password_info;
 271         } else {
 272                 struct netr_NetworkInfo *network_info;
 273                 uint8_t chal[8];
 274
 275                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
 276                                            user_info, &user_info_new);
 277                 NT_STATUS_NOT_OK_RETURN(status);
 278                 user_info = user_info_new;
 279
 280                 network_info = talloc(s, struct netr_NetworkInfo);
 281                 NT_STATUS_HAVE_NO_MEMORY(network_info);
 282
 283                 status = auth_get_challenge(ctx->auth_ctx, chal);
 284                 NT_STATUS_NOT_OK_RETURN(status);
 285
 286                 memcpy(network_info->challenge, chal, sizeof(network_info->challenge));
 287
 288                 network_info->nt.length = user_info->password.response.nt.length;
 289                 network_info->nt.data   = user_info->password.response.nt.data;
 290
 291                 network_info->lm.length = user_info->password.response.lanman.length;
 292                 network_info->lm.data   = user_info->password.response.lanman.data;
 293
 294                 identity_info = &network_info->identity_info;
 295                 s->req.in.logon_level   = 2;
 296                 s->req.in.logon.network = network_info;
 297         }
 298
 299         identity_info->domain_name.string       = user_info->client.domain_name;
 300         identity_info->parameter_control        = user_info->logon_parameters; /* see MSV1_0_* */
 301         identity_info->logon_id_low             = 0;
 302         identity_info->logon_id_high            = 0;
 303         identity_info->account_name.string      = user_info->client.account_name;
 304         identity_info->workstation.string       = user_info->workstation_name;
 305
 306         s->req.in.validation_level      = 3;
 307
 308         status = IRPC_CALL(ctx->auth_ctx->msg_ctx, winbind_servers[0],
 309                            winbind, WINBIND_SAMLOGON,
 310                            &s->req, s);
 311         NT_STATUS_NOT_OK_RETURN(status);
 312
 313         status = make_server_info_netlogon_validation(mem_ctx,
 314                                                       user_info->client.account_name,
 315                                                       s->req.in.validation_level,
 316                                                       &s->req.out.validation,
 317                                                       server_info);
 318         NT_STATUS_NOT_OK_RETURN(status);
 319
 320         return NT_STATUS_OK;
 321 }
 322
 323 /*
 324  Authenticate a user with a challenge/response
 325  using the samba3 winbind protocol via libwbclient
 326 */
 327 static NTSTATUS winbind_check_password_wbclient(struct auth_method_context *ctx,
 328                                                 TALLOC_CTX *mem_ctx,
 329                                                 const struct auth_usersupplied_info *user_info,
 330                                                 struct auth_serversupplied_info **server_info)
 331 {
 332         struct wbcAuthUserParams params;
 333         struct wbcAuthUserInfo *info = NULL;
 334         struct wbcAuthErrorInfo *err = NULL;
 335         wbcErr wbc_status;
 336         NTSTATUS nt_status;
 337         struct netr_SamInfo3 info3;
 338         union netr_Validation validation;
 339
 340
 341         /* Send off request */
 342         const struct auth_usersupplied_info *user_info_temp;
 343         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 344                                       AUTH_PASSWORD_RESPONSE,
 345                                       user_info, &user_info_temp);
 346         if (!NT_STATUS_IS_OK(nt_status)) {
 347                 return nt_status;
 348         }
 349         user_info = user_info_temp;
 350
 351         ZERO_STRUCT(params);
 352         ZERO_STRUCT(info3);
 353         /*params.flags = WBFLAG_PAM_INFO3_NDR;*/
 354
 355         params.parameter_control = user_info->logon_parameters;
 356         params.parameter_control |= WBC_MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT |
 357                                     WBC_MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT;
 358         params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
 359
 360         params.account_name     = user_info->client.account_name;
 361         params.domain_name      = user_info->client.domain_name;
 362         params.workstation_name = user_info->workstation_name;
 363
 364         d_fprintf(stderr, "looking up %s@%s logging in from %s\n",
 365                   params.account_name, params.domain_name,
 366                   params.workstation_name);
 367
 368         memcpy(params.password.response.challenge,
 369                ctx->auth_ctx->challenge.data.data,
 370                sizeof(params.password.response.challenge));
 371
 372         params.password.response.lm_length =
 373                 user_info->password.response.lanman.length;
 374         params.password.response.nt_length =
 375                 user_info->password.response.nt.length;
 376
 377         params.password.response.lm_data =
 378                 user_info->password.response.lanman.data;
 379         params.password.response.nt_data =
 380                 user_info->password.response.nt.data;
 381
 382         wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
 383         if (!WBC_ERROR_IS_OK(wbc_status)) {
 384                 DEBUG(1, ("error was %s (0x%08x)\nerror message was '%s'\n",
 385                       err->nt_string, err->nt_status, err->display_string));
 386
 387                 nt_status = NT_STATUS(err->nt_status);
 388                 wbcFreeMemory(err);
 389                 NT_STATUS_NOT_OK_RETURN(nt_status);
 390         }
 391         nt_status = get_info3_from_wbcAuthUserInfo(mem_ctx, info, &info3);
 392         wbcFreeMemory(info);
 393         NT_STATUS_NOT_OK_RETURN(nt_status);
 394
 395         validation.sam3 = &info3;
 396         nt_status = make_server_info_netlogon_validation(mem_ctx,
 397                                         user_info->client.account_name,
 398                                         3, &validation, server_info);
 399         return nt_status;
 400
 401 }
 402
 403 static const struct auth_operations winbind_samba3_ops = {
 404         .name           = "winbind_samba3",
 405         .get_challenge  = auth_get_challenge_not_implemented,
 406         .want_check     = winbind_want_check,
 407         .check_password = winbind_check_password_samba3
 408 };
 409
 410 static const struct auth_operations winbind_ops = {
 411         .name           = "winbind",
 412         .get_challenge  = auth_get_challenge_not_implemented,
 413         .want_check     = winbind_want_check,
 414         .check_password = winbind_check_password
 415 };
 416
 417 static const struct auth_operations winbind_wbclient_ops = {
 418         .name           = "winbind_wbclient",
 419         .get_challenge  = auth_get_challenge_not_implemented,
 420         .want_check     = winbind_want_check,
 421         .check_password = winbind_check_password_wbclient
 422 };
 423
 424 _PUBLIC_ NTSTATUS auth_winbind_init(void)
 425 {
 426         NTSTATUS ret;
 427
 428         ret = auth_register(&winbind_samba3_ops);
 429         if (!NT_STATUS_IS_OK(ret)) {
 430                 DEBUG(0,("Failed to register 'winbind_samba3' auth backend!\n"));
 431                 return ret;
 432         }
 433
 434         ret = auth_register(&winbind_ops);
 435         if (!NT_STATUS_IS_OK(ret)) {
 436                 DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
 437                 return ret;
 438         }
 439
 440         ret = auth_register(&winbind_wbclient_ops);
 441         if (!NT_STATUS_IS_OK(ret)) {
 442                 DEBUG(0,("Failed to register 'winbind_wbclient' auth backend!\n"));
 443                 return ret;
 444         }
 445
 446         return NT_STATUS_OK;
 447 }