source/nsswitch/libwbclient/wbc_pam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind client API
   5
   6    Copyright (C) Gerald (Jerry) Carter 2007
   7
   8    This library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Lesser General Public
  10    License as published by the Free Software Foundation; either
  11    version 3 of the License, or (at your option) any later version.
  12
  13    This library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    Library General Public License for more details.
  17
  18    You should have received a copy of the GNU Lesser General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /* Required Headers */
  23
  24 #include "libwbclient.h"
  25
  26 /** @brief Authenticate a username/password pair
  27  *
  28  * @param username     Name of user to authenticate
  29  * @param password     Clear text password os user
  30  *
  31  * @return #wbcErr
  32  **/
  33
  34 wbcErr wbcAuthenticateUser(const char *username,
  35                            const char *password)
  36 {
  37         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
  38         struct winbindd_request request;
  39         struct winbindd_response response;
  40
  41         if (!username) {
  42                 wbc_status = WBC_ERR_INVALID_PARAM;
  43                 BAIL_ON_WBC_ERROR(wbc_status);
  44         }
  45
  46         /* Initialize request */
  47
  48         ZERO_STRUCT(request);
  49         ZERO_STRUCT(response);
  50
  51         /* dst is already null terminated from the memset above */
  52
  53         strncpy(request.data.auth.user, username,
  54                 sizeof(request.data.auth.user)-1);
  55         strncpy(request.data.auth.pass, password,
  56                 sizeof(request.data.auth.user)-1);
  57
  58         wbc_status = wbcRequestResponse(WINBINDD_PAM_AUTH,
  59                                         &request,
  60                                         &response);
  61         BAIL_ON_WBC_ERROR(wbc_status);
  62
  63 done:
  64         return wbc_status;
  65 }
  66
  67 static wbcErr wbc_create_auth_info(TALLOC_CTX *mem_ctx,
  68                                    const struct winbindd_response *resp,
  69                                    struct wbcAuthUserInfo **_i)
  70 {
  71         wbcErr wbc_status = WBC_ERR_SUCCESS;
  72         struct wbcAuthUserInfo *i;
  73         struct wbcDomainSid domain_sid;
  74         char *p;
  75         uint32_t sn = 0;
  76         uint32_t j;
  77
  78         i = talloc(mem_ctx, struct wbcAuthUserInfo);
  79         BAIL_ON_PTR_ERROR(i, wbc_status);
  80
  81         i->user_flags   = resp->data.auth.info3.user_flgs;
  82
  83         i->account_name = talloc_strdup(i, resp->data.auth.info3.user_name);
  84         BAIL_ON_PTR_ERROR(i->account_name, wbc_status);
  85         i->user_principal= NULL;
  86         i->full_name    = talloc_strdup(i, resp->data.auth.info3.full_name);
  87         BAIL_ON_PTR_ERROR(i->full_name, wbc_status);
  88         i->domain_name  = talloc_strdup(i, resp->data.auth.info3.logon_dom);
  89         BAIL_ON_PTR_ERROR(i->domain_name, wbc_status);
  90         i->dns_domain_name= NULL;
  91
  92         i->acct_flags   = resp->data.auth.info3.acct_flags;
  93         memcpy(i->user_session_key,
  94                resp->data.auth.user_session_key,
  95                sizeof(i->user_session_key));
  96         memcpy(i->lm_session_key,
  97                resp->data.auth.first_8_lm_hash,
  98                sizeof(i->lm_session_key));
  99
 100         i->logon_count          = resp->data.auth.info3.logon_count;
 101         i->bad_password_count   = resp->data.auth.info3.bad_pw_count;
 102
 103         i->logon_time           = resp->data.auth.info3.logon_time;
 104         i->logoff_time          = resp->data.auth.info3.logoff_time;
 105         i->kickoff_time         = resp->data.auth.info3.kickoff_time;
 106         i->pass_last_set_time   = resp->data.auth.info3.pass_last_set_time;
 107         i->pass_can_change_time = resp->data.auth.info3.pass_can_change_time;
 108         i->pass_must_change_time= resp->data.auth.info3.pass_must_change_time;
 109
 110         i->logon_server = talloc_strdup(i, resp->data.auth.info3.logon_srv);
 111         BAIL_ON_PTR_ERROR(i->logon_server, wbc_status);
 112         i->logon_script = talloc_strdup(i, resp->data.auth.info3.logon_script);
 113         BAIL_ON_PTR_ERROR(i->logon_script, wbc_status);
 114         i->profile_path = talloc_strdup(i, resp->data.auth.info3.profile_path);
 115         BAIL_ON_PTR_ERROR(i->profile_path, wbc_status);
 116         i->home_directory= talloc_strdup(i, resp->data.auth.info3.home_dir);
 117         BAIL_ON_PTR_ERROR(i->home_directory, wbc_status);
 118         i->home_drive   = talloc_strdup(i, resp->data.auth.info3.dir_drive);
 119         BAIL_ON_PTR_ERROR(i->home_drive, wbc_status);
 120
 121         i->num_sids     = 2;
 122         i->num_sids     += resp->data.auth.info3.num_groups;
 123         i->num_sids     += resp->data.auth.info3.num_other_sids;
 124
 125         i->sids = talloc_array(i, struct wbcSidWithAttr, i->num_sids);
 126         BAIL_ON_PTR_ERROR(i->sids, wbc_status);
 127
 128         wbc_status = wbcStringToSid(resp->data.auth.info3.dom_sid,
 129                                     &domain_sid);
 130         BAIL_ON_WBC_ERROR(wbc_status);
 131
 132 #define _SID_COMPOSE(s, d, r, a) { \
 133         (s).sid = d; \
 134         if ((s).sid.num_auths < MAXSUBAUTHS) { \
 135                 (s).sid.sub_auths[(s).sid.num_auths++] = r; \
 136         } else { \
 137                 wbc_status = WBC_ERR_INVALID_SID; \
 138                 BAIL_ON_WBC_ERROR(wbc_status); \
 139         } \
 140         (s).attributes = a; \
 141 } while (0)
 142
 143         sn = 0;
 144         _SID_COMPOSE(i->sids[sn], domain_sid,
 145                      resp->data.auth.info3.user_rid,
 146                      0);
 147         sn++;
 148         _SID_COMPOSE(i->sids[sn], domain_sid,
 149                      resp->data.auth.info3.group_rid,
 150                      0);
 151         sn++;
 152
 153         p = resp->extra_data.data;
 154         if (!p) {
 155                 wbc_status = WBC_INVALID_RESPONSE;
 156                 BAIL_ON_WBC_ERROR(wbc_status);
 157         }
 158
 159         for (j=0; j < resp->data.auth.info3.num_groups; j++) {
 160                 uint32_t rid;
 161                 uint32_t attrs;
 162                 int ret;
 163                 char *s = p;
 164                 char *e = strchr(p, '\n');
 165                 if (!e) {
 166                         wbc_status = WBC_INVALID_RESPONSE;
 167                         BAIL_ON_WBC_ERROR(wbc_status);
 168                 }
 169                 e[0] = '\0';
 170                 p = &e[1];
 171
 172                 ret = sscanf(s, "0x%08X:0x%08X", &rid, &attrs);
 173                 if (ret != 2) {
 174                         wbc_status = WBC_INVALID_RESPONSE;
 175                         BAIL_ON_WBC_ERROR(wbc_status);
 176                 }
 177
 178                 _SID_COMPOSE(i->sids[sn], domain_sid,
 179                              rid, attrs);
 180                 sn++;
 181         }
 182
 183         for (j=0; j < resp->data.auth.info3.num_other_sids; j++) {
 184                 uint32_t attrs;
 185                 int ret;
 186                 char *s = p;
 187                 char *a;
 188                 char *e = strchr(p, '\n');
 189                 if (!e) {
 190                         wbc_status = WBC_INVALID_RESPONSE;
 191                         BAIL_ON_WBC_ERROR(wbc_status);
 192                 }
 193                 e[0] = '\0';
 194                 p = &e[1];
 195
 196                 e = strchr(s, ':');
 197                 if (!e) {
 198                         wbc_status = WBC_INVALID_RESPONSE;
 199                         BAIL_ON_WBC_ERROR(wbc_status);
 200                 }
 201                 e[0] = '\0';
 202                 a = &e[1];
 203
 204                 ret = sscanf(a, "0x%08X",
 205                              &attrs);
 206                 if (ret != 1) {
 207                         wbc_status = WBC_INVALID_RESPONSE;
 208                         BAIL_ON_WBC_ERROR(wbc_status);
 209                 }
 210
 211                 wbc_status = wbcStringToSid(s, &i->sids[sn].sid);
 212                 BAIL_ON_WBC_ERROR(wbc_status);
 213
 214                 i->sids[sn].attributes = attrs;
 215                 sn++;
 216         }
 217
 218         i->num_sids = sn;
 219
 220         *_i = i;
 221         i = NULL;
 222 done:
 223         talloc_free(i);
 224         return wbc_status;
 225 }
 226
 227 static wbcErr wbc_create_error_info(TALLOC_CTX *mem_ctx,
 228                                   const struct winbindd_response *resp,
 229                                   struct wbcAuthErrorInfo **_e)
 230 {
 231         wbcErr wbc_status = WBC_ERR_SUCCESS;
 232         struct wbcAuthErrorInfo *e;
 233
 234         e = talloc(mem_ctx, struct wbcAuthErrorInfo);
 235         BAIL_ON_PTR_ERROR(e, wbc_status);
 236
 237         e->nt_status = resp->data.auth.nt_status;
 238         e->pam_error = resp->data.auth.pam_error;
 239         e->nt_string = talloc_strdup(e, resp->data.auth.nt_status_string);
 240         BAIL_ON_PTR_ERROR(e->nt_string, wbc_status);
 241
 242         e->display_string = talloc_strdup(e, resp->data.auth.error_string);
 243         BAIL_ON_PTR_ERROR(e->display_string, wbc_status);
 244
 245         *_e = e;
 246         e = NULL;
 247
 248 done:
 249         talloc_free(e);
 250         return wbc_status;
 251 }
 252
 253 /** @brief Authenticate with more detailed information
 254  *
 255  * @param params       Input parameters, only WBC_AUTH_USER_LEVEL_RESPONSE
 256  *                     is supported yet
 257  * @param info         Output details on WBC_ERR_SUCCESS
 258  * @param error        Output details on WBC_ERR_AUTH_ERROR
 259  *
 260  * @return #wbcErr
 261  **/
 262
 263 wbcErr wbcAuthenticateUserEx(const struct wbcAuthUserParams *params,
 264                              struct wbcAuthUserInfo **info,
 265                              struct wbcAuthErrorInfo **error)
 266 {
 267         wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
 268         int cmd = 0;
 269         struct winbindd_request request;
 270         struct winbindd_response response;
 271
 272         ZERO_STRUCT(request);
 273         ZERO_STRUCT(response);
 274
 275         if (error) {
 276                 *error = NULL;
 277         }
 278
 279         if (!params) {
 280                 wbc_status = WBC_ERR_INVALID_PARAM;
 281                 BAIL_ON_WBC_ERROR(wbc_status);
 282         }
 283
 284         if (!params->account_name) {
 285                 wbc_status = WBC_ERR_INVALID_PARAM;
 286                 BAIL_ON_WBC_ERROR(wbc_status);
 287         }
 288
 289         /* Initialize request */
 290
 291         switch (params->level) {
 292         case WBC_AUTH_USER_LEVEL_PLAIN:
 293                 wbc_status = WBC_ERR_NOT_IMPLEMENTED;
 294                 BAIL_ON_WBC_ERROR(wbc_status);
 295                 break;
 296
 297         case WBC_AUTH_USER_LEVEL_HASH:
 298                 wbc_status = WBC_ERR_NOT_IMPLEMENTED;
 299                 BAIL_ON_WBC_ERROR(wbc_status);
 300                 break;
 301
 302         case WBC_AUTH_USER_LEVEL_RESPONSE:
 303                 cmd = WINBINDD_PAM_AUTH_CRAP;
 304                 request.flags = WBFLAG_PAM_INFO3_TEXT |
 305                                 WBFLAG_PAM_USER_SESSION_KEY |
 306                                 WBFLAG_PAM_LMKEY;
 307
 308                 if (params->password.response.lm_length &&
 309                     params->password.response.lm_data) {
 310                         wbc_status = WBC_ERR_INVALID_PARAM;
 311                         BAIL_ON_WBC_ERROR(wbc_status);
 312                 }
 313                 if (params->password.response.lm_length == 0 &&
 314                     params->password.response.lm_data) {
 315                         wbc_status = WBC_ERR_INVALID_PARAM;
 316                         BAIL_ON_WBC_ERROR(wbc_status);
 317                 }
 318
 319                 if (params->password.response.nt_length &&
 320                     !params->password.response.nt_data) {
 321                         wbc_status = WBC_ERR_INVALID_PARAM;
 322                         BAIL_ON_WBC_ERROR(wbc_status);
 323                 }
 324                 if (params->password.response.nt_length == 0&&
 325                     params->password.response.nt_data) {
 326                         wbc_status = WBC_ERR_INVALID_PARAM;
 327                         BAIL_ON_WBC_ERROR(wbc_status);
 328                 }
 329
 330                 strncpy(request.data.auth_crap.user,
 331                         params->account_name,
 332                         sizeof(request.data.auth_crap.user)-1);
 333                 if (params->domain_name) {
 334                         strncpy(request.data.auth_crap.domain,
 335                                 params->domain_name,
 336                                 sizeof(request.data.auth_crap.domain)-1);
 337                 }
 338                 if (params->workstation_name) {
 339                         strncpy(request.data.auth_crap.workstation,
 340                                 params->workstation_name,
 341                                 sizeof(request.data.auth_crap.workstation)-1);
 342                 }
 343
 344                 request.data.auth_crap.logon_parameters =
 345                                 params->parameter_control;
 346
 347                 memcpy(request.data.auth_crap.chal,
 348                        params->password.response.challenge,
 349                        sizeof(request.data.auth_crap.chal));
 350
 351                 request.data.auth_crap.lm_resp_len =
 352                                 MIN(params->password.response.lm_length,
 353                                     sizeof(request.data.auth_crap.lm_resp));
 354                 request.data.auth_crap.nt_resp_len =
 355                                 MIN(params->password.response.nt_length,
 356                                     sizeof(request.data.auth_crap.nt_resp));
 357                 if (params->password.response.lm_data) {
 358                         memcpy(request.data.auth_crap.lm_resp,
 359                                params->password.response.lm_data,
 360                                request.data.auth_crap.lm_resp_len);
 361                 }
 362                 if (params->password.response.nt_data) {
 363                         memcpy(request.data.auth_crap.nt_resp,
 364                                params->password.response.nt_data,
 365                                request.data.auth_crap.nt_resp_len);
 366                 }
 367                 break;
 368         }
 369
 370         if (cmd == 0) {
 371                 wbc_status = WBC_ERR_INVALID_PARAM;
 372                 BAIL_ON_WBC_ERROR(wbc_status);
 373         }
 374
 375         wbc_status = wbcRequestResponse(cmd,
 376                                         &request,
 377                                         &response);
 378         if (response.data.auth.nt_status != 0) {
 379                 if (error) {
 380                         wbc_status = wbc_create_error_info(NULL,
 381                                                            &response,
 382                                                            error);
 383                         BAIL_ON_WBC_ERROR(wbc_status);
 384                 }
 385
 386                 wbc_status = WBC_ERR_AUTH_ERROR;
 387                 BAIL_ON_WBC_ERROR(wbc_status);
 388         }
 389         BAIL_ON_WBC_ERROR(wbc_status);
 390
 391         if (info) {
 392                 wbc_status = wbc_create_auth_info(NULL,
 393                                                   &response,
 394                                                   info);
 395                 BAIL_ON_WBC_ERROR(wbc_status);
 396         }
 397
 398 done:
 399
 400         return wbc_status;
 401 }