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         info3->base.account_name.string = talloc_strdup(mem_ctx,
  75                                                         info->account_name);
  76         info3->base.full_name.string = talloc_strdup(mem_ctx,
  77                                                      info->full_name);
  78         info3->base.logon_script.string = talloc_strdup(mem_ctx,
  79                                                         info->logon_script);
  80         info3->base.profile_path.string = talloc_strdup(mem_ctx,
  81                                                         info->profile_path);
  82         info3->base.home_directory.string = talloc_strdup(mem_ctx,
  83                                                           info->home_directory);
  84         info3->base.home_drive.string = talloc_strdup(mem_ctx,
  85                                                       info->home_drive);
  86         info3->base.logon_server.string = talloc_strdup(mem_ctx,
  87                                                         info->logon_server);
  88         info3->base.domain.string = talloc_strdup(mem_ctx,
  89                                                   info->domain_name);
  90
  91         info3->base.logon_count = info->logon_count;
  92         info3->base.bad_password_count = info->bad_password_count;
  93         info3->base.user_flags = info->user_flags;
  94         memcpy(info3->base.key.key, info->user_session_key,
  95                sizeof(info3->base.key.key));
  96         memcpy(info3->base.LMSessKey.key, info->lm_session_key,
  97                sizeof(info3->base.LMSessKey.key));
  98         info3->base.acct_flags = info->acct_flags;
  99         memset(info3->base.unknown, 0, sizeof(info3->base.unknown));
 100
 101         if (info->num_sids < 2) {
 102                 return NT_STATUS_INVALID_PARAMETER;
 103         }
 104
 105         dom_sid_split_rid(mem_ctx, (struct dom_sid2 *) &info->sids[0].sid,
 106                           &info3->base.domain_sid,
 107                           &info3->base.rid);
 108         dom_sid_split_rid(mem_ctx, (struct dom_sid2 *) &info->sids[1].sid, NULL,
 109                           &info3->base.primary_gid);
 110
 111         /* We already handled the first two, now take care of the rest */
 112         info3->base.groups.count = info->num_sids - 2;
 113
 114         rids = talloc_array(mem_ctx, struct samr_RidWithAttribute,
 115                             info3->base.groups.count);
 116         NT_STATUS_HAVE_NO_MEMORY(rids);
 117
 118         for (i = 2, j = 0; i < info->num_sids; ++i, ++j) {
 119                 rids[j].attributes = info->sids[i].attributes;
 120                 dom_sid_split_rid(mem_ctx,
 121                                   (struct dom_sid2 *) &info->sids[i].sid,
 122                                   NULL, &rids[j].rid);
 123         }
 124         info3->base.groups.rids = rids;
 125
 126         return NT_STATUS_OK;
 127 }
 128
 129
 130 static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
 131                                    TALLOC_CTX *mem_ctx,
 132                                    const struct auth_usersupplied_info *user_info)
 133 {
 134         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
 135                 return NT_STATUS_NOT_IMPLEMENTED;
 136         }
 137
 138         /* TODO: maybe limit the user scope to remote users only */
 139         return NT_STATUS_OK;
 140 }
 141
 142 /*
 143  Authenticate a user with a challenge/response
 144  using the samba3 winbind protocol
 145 */
 146 static NTSTATUS winbind_check_password_samba3(struct auth_method_context *ctx,
 147                                               TALLOC_CTX *mem_ctx,
 148                                               const struct auth_usersupplied_info *user_info,
 149                                               struct auth_serversupplied_info **server_info)
 150 {
 151         struct winbindd_request request;
 152         struct winbindd_response response;
 153         NSS_STATUS result;
 154         NTSTATUS nt_status;
 155         struct netr_SamInfo3 info3;
 156
 157         /* Send off request */
 158         const struct auth_usersupplied_info *user_info_temp;
 159         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 160                                       AUTH_PASSWORD_RESPONSE,
 161                                       user_info, &user_info_temp);
 162         if (!NT_STATUS_IS_OK(nt_status)) {
 163                 return nt_status;
 164         }
 165         user_info = user_info_temp;
 166
 167         ZERO_STRUCT(request);
 168         ZERO_STRUCT(response);
 169         request.flags = WBFLAG_PAM_INFO3_NDR;
 170
 171         request.data.auth_crap.logon_parameters = user_info->logon_parameters;
 172
 173         safe_strcpy(request.data.auth_crap.user,
 174                        user_info->client.account_name, sizeof(fstring));
 175         safe_strcpy(request.data.auth_crap.domain,
 176                        user_info->client.domain_name, sizeof(fstring));
 177         safe_strcpy(request.data.auth_crap.workstation,
 178                        user_info->workstation_name, sizeof(fstring));
 179
 180         memcpy(request.data.auth_crap.chal, ctx->auth_ctx->challenge.data.data, sizeof(request.data.auth_crap.chal));
 181
 182         request.data.auth_crap.lm_resp_len = MIN(user_info->password.response.lanman.length,
 183                                                  sizeof(request.data.auth_crap.lm_resp));
 184         request.data.auth_crap.nt_resp_len = MIN(user_info->password.response.nt.length,
 185                                                  sizeof(request.data.auth_crap.nt_resp));
 186
 187         memcpy(request.data.auth_crap.lm_resp, user_info->password.response.lanman.data,
 188                request.data.auth_crap.lm_resp_len);
 189         memcpy(request.data.auth_crap.nt_resp, user_info->password.response.nt.data,
 190                request.data.auth_crap.nt_resp_len);
 191
 192         result = winbindd_request_response(WINBINDD_PAM_AUTH_CRAP, &request, &response);
 193
 194         nt_status = NT_STATUS(response.data.auth.nt_status);
 195         NT_STATUS_NOT_OK_RETURN(nt_status);
 196
 197         if (result == NSS_STATUS_SUCCESS && response.extra_data.data) {
 198                 union netr_Validation validation;
 199
 200                 nt_status = get_info3_from_ndr(mem_ctx, lp_iconv_convenience(ctx->auth_ctx->lp_ctx), &response, &info3);
 201                 SAFE_FREE(response.extra_data.data);
 202                 NT_STATUS_NOT_OK_RETURN(nt_status);
 203
 204                 validation.sam3 = &info3;
 205                 nt_status = make_server_info_netlogon_validation(mem_ctx,
 206                                                                  user_info->client.account_name,
 207                                                                  3, &validation,
 208                                                                  server_info);
 209                 return nt_status;
 210         } else if (result == NSS_STATUS_SUCCESS && !response.extra_data.data) {
 211                 DEBUG(0, ("Winbindd authenticated the user [%s]\\[%s], "
 212                           "but did not include the required info3 reply!\n",
 213                           user_info->client.domain_name, user_info->client.account_name));
 214                 return NT_STATUS_INSUFFICIENT_LOGON_INFO;
 215         } else if (NT_STATUS_IS_OK(nt_status)) {
 216                 DEBUG(1, ("Winbindd authentication for [%s]\\[%s] failed, "
 217                           "but no error code is available!\n",
 218                           user_info->client.domain_name, user_info->client.account_name));
 219                 return NT_STATUS_NO_LOGON_SERVERS;
 220         }
 221
 222         return nt_status;
 223 }
 224
 225 struct winbind_check_password_state {
 226         struct winbind_SamLogon req;
 227 };
 228
 229 /*
 230  Authenticate a user with a challenge/response
 231  using IRPC to the winbind task
 232 */
 233 static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
 234                                        TALLOC_CTX *mem_ctx,
 235                                        const struct auth_usersupplied_info *user_info,
 236                                        struct auth_serversupplied_info **server_info)
 237 {
 238         NTSTATUS status;
 239         struct server_id *winbind_servers;
 240         struct winbind_check_password_state *s;
 241         const struct auth_usersupplied_info *user_info_new;
 242         struct netr_IdentityInfo *identity_info;
 243
 244         s = talloc(mem_ctx, struct winbind_check_password_state);
 245         NT_STATUS_HAVE_NO_MEMORY(s);
 246
 247         winbind_servers = irpc_servers_byname(ctx->auth_ctx->msg_ctx, s, "winbind_server");
 248         if ((winbind_servers == NULL) || (winbind_servers[0].id == 0)) {
 249                 DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, "
 250                           "no winbind_server running!\n",
 251                           user_info->client.domain_name, user_info->client.account_name));
 252                 return NT_STATUS_NO_LOGON_SERVERS;
 253         }
 254
 255         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
 256                 struct netr_PasswordInfo *password_info;
 257
 258                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_HASH,
 259                                            user_info, &user_info_new);
 260                 NT_STATUS_NOT_OK_RETURN(status);
 261                 user_info = user_info_new;
 262
 263                 password_info = talloc(s, struct netr_PasswordInfo);
 264                 NT_STATUS_HAVE_NO_MEMORY(password_info);
 265
 266                 password_info->lmpassword = *user_info->password.hash.lanman;
 267                 password_info->ntpassword = *user_info->password.hash.nt;
 268
 269                 identity_info = &password_info->identity_info;
 270                 s->req.in.logon_level   = 1;
 271                 s->req.in.logon.password= password_info;
 272         } else {
 273                 struct netr_NetworkInfo *network_info;
 274                 const uint8_t *challenge;
 275
 276                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
 277                                            user_info, &user_info_new);
 278                 NT_STATUS_NOT_OK_RETURN(status);
 279                 user_info = user_info_new;
 280
 281                 network_info = talloc(s, struct netr_NetworkInfo);
 282                 NT_STATUS_HAVE_NO_MEMORY(network_info);
 283
 284                 status = auth_get_challenge(ctx->auth_ctx, &challenge);
 285                 NT_STATUS_NOT_OK_RETURN(status);
 286
 287                 memcpy(network_info->challenge, challenge, sizeof(network_info->challenge));
 288
 289                 network_info->nt.length = user_info->password.response.nt.length;
 290                 network_info->nt.data   = user_info->password.response.nt.data;
 291
 292                 network_info->lm.length = user_info->password.response.lanman.length;
 293                 network_info->lm.data   = user_info->password.response.lanman.data;
 294
 295                 identity_info = &network_info->identity_info;
 296                 s->req.in.logon_level   = 2;
 297                 s->req.in.logon.network = network_info;
 298         }
 299
 300         identity_info->domain_name.string       = user_info->client.domain_name;
 301         identity_info->parameter_control        = user_info->logon_parameters; /* see MSV1_0_* */
 302         identity_info->logon_id_low             = 0;
 303         identity_info->logon_id_high            = 0;
 304         identity_info->account_name.string      = user_info->client.account_name;
 305         identity_info->workstation.string       = user_info->workstation_name;
 306
 307         s->req.in.validation_level      = 3;
 308
 309         status = IRPC_CALL(ctx->auth_ctx->msg_ctx, winbind_servers[0],
 310                            winbind, WINBIND_SAMLOGON,
 311                            &s->req, s);
 312         NT_STATUS_NOT_OK_RETURN(status);
 313
 314         status = make_server_info_netlogon_validation(mem_ctx,
 315                                                       user_info->client.account_name,
 316                                                       s->req.in.validation_level,
 317                                                       &s->req.out.validation,
 318                                                       server_info);
 319         NT_STATUS_NOT_OK_RETURN(status);
 320
 321         return NT_STATUS_OK;
 322 }
 323
 324 /*
 325  Authenticate a user with a challenge/response
 326  using the samba3 winbind protocol via libwbclient
 327 */
 328 static NTSTATUS winbind_check_password_wbclient(struct auth_method_context *ctx,
 329                                                 TALLOC_CTX *mem_ctx,
 330                                                 const struct auth_usersupplied_info *user_info,
 331                                                 struct auth_serversupplied_info **server_info)
 332 {
 333         struct wbcAuthUserParams params;
 334         struct wbcAuthUserInfo *info = NULL;
 335         struct wbcAuthErrorInfo *err = NULL;
 336         wbcErr wbc_status;
 337         NTSTATUS nt_status;
 338         struct netr_SamInfo3 info3;
 339         union netr_Validation validation;
 340
 341
 342         /* Send off request */
 343         const struct auth_usersupplied_info *user_info_temp;
 344         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 345                                       AUTH_PASSWORD_RESPONSE,
 346                                       user_info, &user_info_temp);
 347         if (!NT_STATUS_IS_OK(nt_status)) {
 348                 return nt_status;
 349         }
 350         user_info = user_info_temp;
 351
 352         ZERO_STRUCT(params);
 353         ZERO_STRUCT(info3);
 354         /*params.flags = WBFLAG_PAM_INFO3_NDR;*/
 355
 356         params.parameter_control = user_info->logon_parameters;
 357         params.parameter_control |= WBC_MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT |
 358                                     WBC_MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT;
 359         params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
 360
 361         params.account_name     = user_info->client.account_name;
 362         params.domain_name      = user_info->client.domain_name;
 363         params.workstation_name = user_info->workstation_name;
 364
 365         d_fprintf(stderr, "looking up %s@%s logging in from %s\n",
 366                   params.account_name, params.domain_name,
 367                   params.workstation_name);
 368
 369         memcpy(params.password.response.challenge,
 370                ctx->auth_ctx->challenge.data.data,
 371                sizeof(params.password.response.challenge));
 372
 373         params.password.response.lm_length =
 374                 user_info->password.response.lanman.length;
 375         params.password.response.nt_length =
 376                 user_info->password.response.nt.length;
 377
 378         params.password.response.lm_data =
 379                 user_info->password.response.lanman.data;
 380         params.password.response.nt_data =
 381                 user_info->password.response.nt.data;
 382
 383         wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
 384         if (!WBC_ERROR_IS_OK(wbc_status)) {
 385                 DEBUG(1, ("error was %s (0x%08x)\nerror message was '%s'\n",
 386                       err->nt_string, err->nt_status, err->display_string));
 387
 388                 nt_status = NT_STATUS(err->nt_status);
 389                 wbcFreeMemory(err);
 390                 NT_STATUS_NOT_OK_RETURN(nt_status);
 391         }
 392         nt_status = get_info3_from_wbcAuthUserInfo(mem_ctx,
 393                                 lp_iconv_convenience(ctx->auth_ctx->lp_ctx),
 394                                 info, &info3);
 395         wbcFreeMemory(info);
 396         NT_STATUS_NOT_OK_RETURN(nt_status);
 397
 398         validation.sam3 = &info3;
 399         nt_status = make_server_info_netlogon_validation(mem_ctx,
 400                                         user_info->client.account_name,
 401                                         3, &validation, server_info);
 402         return nt_status;
 403
 404 }
 405
 406 static const struct auth_operations winbind_samba3_ops = {
 407         .name           = "winbind_samba3",
 408         .get_challenge  = auth_get_challenge_not_implemented,
 409         .want_check     = winbind_want_check,
 410         .check_password = winbind_check_password_samba3
 411 };
 412
 413 static const struct auth_operations winbind_ops = {
 414         .name           = "winbind",
 415         .get_challenge  = auth_get_challenge_not_implemented,
 416         .want_check     = winbind_want_check,
 417         .check_password = winbind_check_password
 418 };
 419
 420 static const struct auth_operations winbind_wbclient_ops = {
 421         .name           = "winbind_wbclient",
 422         .get_challenge  = auth_get_challenge_not_implemented,
 423         .want_check     = winbind_want_check,
 424         .check_password = winbind_check_password_wbclient
 425 };
 426
 427 _PUBLIC_ NTSTATUS auth_winbind_init(void)
 428 {
 429         NTSTATUS ret;
 430
 431         ret = auth_register(&winbind_samba3_ops);
 432         if (!NT_STATUS_IS_OK(ret)) {
 433                 DEBUG(0,("Failed to register 'winbind_samba3' auth backend!\n"));
 434                 return ret;
 435         }
 436
 437         ret = auth_register(&winbind_ops);
 438         if (!NT_STATUS_IS_OK(ret)) {
 439                 DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
 440                 return ret;
 441         }
 442
 443         ret = auth_register(&winbind_wbclient_ops);
 444         if (!NT_STATUS_IS_OK(ret)) {
 445                 DEBUG(0,("Failed to register 'winbind_wbclient' auth backend!\n"));
 446                 return ret;
 447         }
 448
 449         return NT_STATUS_OK;
 450 }