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 "librpc/gen_ndr/ndr_winbind_c.h"
  29 #include "lib/messaging/irpc.h"
  30 #include "param/param.h"
  31 #include "nsswitch/libwbclient/wbclient.h"
  32 #include "libcli/security/security.h"
  33
  34 _PUBLIC_ NTSTATUS auth4_winbind_init(void);
  35
  36 static NTSTATUS get_info3_from_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
  37                                                struct wbcAuthUserInfo *info,
  38                                                struct netr_SamInfo3 *info3)
  39 {
  40         int i, j;
  41         struct samr_RidWithAttribute *rids = NULL;
  42         struct dom_sid *user_sid;
  43         struct dom_sid *group_sid;
  44
  45         user_sid = (struct dom_sid *)(void *)&info->sids[0].sid;
  46         group_sid = (struct dom_sid *)(void *)&info->sids[1].sid;
  47
  48         info3->base.last_logon = info->logon_time;
  49         info3->base.last_logoff = info->logoff_time;
  50         info3->base.acct_expiry = info->kickoff_time;
  51         info3->base.last_password_change = info->pass_last_set_time;
  52         info3->base.allow_password_change = info->pass_can_change_time;
  53         info3->base.force_password_change = info->pass_must_change_time;
  54
  55         info3->base.account_name.string = talloc_strdup(mem_ctx,
  56                                                         info->account_name);
  57         info3->base.full_name.string = talloc_strdup(mem_ctx,
  58                                                      info->full_name);
  59         info3->base.logon_script.string = talloc_strdup(mem_ctx,
  60                                                         info->logon_script);
  61         info3->base.profile_path.string = talloc_strdup(mem_ctx,
  62                                                         info->profile_path);
  63         info3->base.home_directory.string = talloc_strdup(mem_ctx,
  64                                                           info->home_directory);
  65         info3->base.home_drive.string = talloc_strdup(mem_ctx,
  66                                                       info->home_drive);
  67         info3->base.logon_server.string = talloc_strdup(mem_ctx,
  68                                                         info->logon_server);
  69         info3->base.domain.string = talloc_strdup(mem_ctx,
  70                                                   info->domain_name);
  71
  72         info3->base.logon_count = info->logon_count;
  73         info3->base.bad_password_count = info->bad_password_count;
  74         info3->base.user_flags = info->user_flags;
  75         memcpy(info3->base.key.key, info->user_session_key,
  76                sizeof(info3->base.key.key));
  77         memcpy(info3->base.LMSessKey.key, info->lm_session_key,
  78                sizeof(info3->base.LMSessKey.key));
  79         info3->base.acct_flags = info->acct_flags;
  80         memset(info3->base.unknown, 0, sizeof(info3->base.unknown));
  81
  82         if (info->num_sids < 2) {
  83                 return NT_STATUS_INVALID_PARAMETER;
  84         }
  85
  86         dom_sid_split_rid(mem_ctx, user_sid,
  87                           &info3->base.domain_sid,
  88                           &info3->base.rid);
  89         dom_sid_split_rid(mem_ctx, group_sid, NULL,
  90                           &info3->base.primary_gid);
  91
  92         /* We already handled the first two, now take care of the rest */
  93         info3->base.groups.count = info->num_sids - 2;
  94
  95         rids = talloc_array(mem_ctx, struct samr_RidWithAttribute,
  96                             info3->base.groups.count);
  97         NT_STATUS_HAVE_NO_MEMORY(rids);
  98
  99         for (i = 2, j = 0; i < info->num_sids; ++i, ++j) {
 100                 struct dom_sid *tmp_sid;
 101                 tmp_sid = (struct dom_sid *)(void *)&info->sids[1].sid;
 102
 103                 rids[j].attributes = info->sids[i].attributes;
 104                 dom_sid_split_rid(mem_ctx, tmp_sid,
 105                                   NULL, &rids[j].rid);
 106         }
 107         info3->base.groups.rids = rids;
 108
 109         return NT_STATUS_OK;
 110 }
 111
 112
 113 static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
 114                                    TALLOC_CTX *mem_ctx,
 115                                    const struct auth_usersupplied_info *user_info)
 116 {
 117         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
 118                 return NT_STATUS_NOT_IMPLEMENTED;
 119         }
 120
 121         /* TODO: maybe limit the user scope to remote users only */
 122         return NT_STATUS_OK;
 123 }
 124
 125 struct winbind_check_password_state {
 126         struct winbind_SamLogon req;
 127 };
 128
 129 /*
 130  Authenticate a user with a challenge/response
 131  using IRPC to the winbind task
 132 */
 133 static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
 134                                        TALLOC_CTX *mem_ctx,
 135                                        const struct auth_usersupplied_info *user_info,
 136                                        struct auth_user_info_dc **user_info_dc)
 137 {
 138         NTSTATUS status;
 139         struct dcerpc_binding_handle *irpc_handle;
 140         struct winbind_check_password_state *s;
 141         const struct auth_usersupplied_info *user_info_new;
 142         struct netr_IdentityInfo *identity_info;
 143
 144         if (!ctx->auth_ctx->msg_ctx) {
 145                 DEBUG(0,("winbind_check_password: auth_context_create was called with out messaging context\n"));
 146                 return NT_STATUS_INTERNAL_ERROR;
 147         }
 148
 149         s = talloc(mem_ctx, struct winbind_check_password_state);
 150         NT_STATUS_HAVE_NO_MEMORY(s);
 151
 152         irpc_handle = irpc_binding_handle_by_name(s, ctx->auth_ctx->msg_ctx,
 153                                                   "winbind_server",
 154                                                   &ndr_table_winbind);
 155         if (irpc_handle == NULL) {
 156                 DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, "
 157                           "no winbind_server running!\n",
 158                           user_info->client.domain_name, user_info->client.account_name));
 159                 return NT_STATUS_NO_LOGON_SERVERS;
 160         }
 161
 162         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
 163                 struct netr_PasswordInfo *password_info;
 164
 165                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_HASH,
 166                                            user_info, &user_info_new);
 167                 NT_STATUS_NOT_OK_RETURN(status);
 168                 user_info = user_info_new;
 169
 170                 password_info = talloc(s, struct netr_PasswordInfo);
 171                 NT_STATUS_HAVE_NO_MEMORY(password_info);
 172
 173                 password_info->lmpassword = *user_info->password.hash.lanman;
 174                 password_info->ntpassword = *user_info->password.hash.nt;
 175
 176                 identity_info = &password_info->identity_info;
 177                 s->req.in.logon_level   = 1;
 178                 s->req.in.logon.password= password_info;
 179         } else {
 180                 struct netr_NetworkInfo *network_info;
 181                 uint8_t chal[8];
 182
 183                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
 184                                            user_info, &user_info_new);
 185                 NT_STATUS_NOT_OK_RETURN(status);
 186                 user_info = user_info_new;
 187
 188                 network_info = talloc(s, struct netr_NetworkInfo);
 189                 NT_STATUS_HAVE_NO_MEMORY(network_info);
 190
 191                 status = auth_get_challenge(ctx->auth_ctx, chal);
 192                 NT_STATUS_NOT_OK_RETURN(status);
 193
 194                 memcpy(network_info->challenge, chal, sizeof(network_info->challenge));
 195
 196                 network_info->nt.length = user_info->password.response.nt.length;
 197                 network_info->nt.data   = user_info->password.response.nt.data;
 198
 199                 network_info->lm.length = user_info->password.response.lanman.length;
 200                 network_info->lm.data   = user_info->password.response.lanman.data;
 201
 202                 identity_info = &network_info->identity_info;
 203                 s->req.in.logon_level   = 2;
 204                 s->req.in.logon.network = network_info;
 205         }
 206
 207         identity_info->domain_name.string       = user_info->client.domain_name;
 208         identity_info->parameter_control        = user_info->logon_parameters; /* see MSV1_0_* */
 209         identity_info->logon_id_low             = 0;
 210         identity_info->logon_id_high            = 0;
 211         identity_info->account_name.string      = user_info->client.account_name;
 212         identity_info->workstation.string       = user_info->workstation_name;
 213
 214         s->req.in.validation_level      = 3;
 215
 216         status = dcerpc_winbind_SamLogon_r(irpc_handle, s, &s->req);
 217         NT_STATUS_NOT_OK_RETURN(status);
 218
 219         status = make_user_info_dc_netlogon_validation(mem_ctx,
 220                                                       user_info->client.account_name,
 221                                                       s->req.in.validation_level,
 222                                                       &s->req.out.validation,
 223                                                        true, /* This user was authenticated */
 224                                                       user_info_dc);
 225         NT_STATUS_NOT_OK_RETURN(status);
 226
 227         return NT_STATUS_OK;
 228 }
 229
 230 /*
 231  Authenticate a user with a challenge/response
 232  using the samba3 winbind protocol via libwbclient
 233 */
 234 static NTSTATUS winbind_check_password_wbclient(struct auth_method_context *ctx,
 235                                                 TALLOC_CTX *mem_ctx,
 236                                                 const struct auth_usersupplied_info *user_info,
 237                                                 struct auth_user_info_dc **user_info_dc)
 238 {
 239         struct wbcAuthUserParams params;
 240         struct wbcAuthUserInfo *info = NULL;
 241         struct wbcAuthErrorInfo *err = NULL;
 242         wbcErr wbc_status;
 243         NTSTATUS nt_status;
 244         struct netr_SamInfo3 info3;
 245         union netr_Validation validation;
 246
 247
 248         /* Send off request */
 249         const struct auth_usersupplied_info *user_info_temp;
 250         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 251                                       AUTH_PASSWORD_RESPONSE,
 252                                       user_info, &user_info_temp);
 253         if (!NT_STATUS_IS_OK(nt_status)) {
 254                 return nt_status;
 255         }
 256         user_info = user_info_temp;
 257
 258         ZERO_STRUCT(params);
 259         ZERO_STRUCT(info3);
 260         /*params.flags = WBFLAG_PAM_INFO3_NDR;*/
 261
 262         params.parameter_control = user_info->logon_parameters;
 263         params.parameter_control |= WBC_MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT |
 264                                     WBC_MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT;
 265         params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
 266
 267         params.account_name     = user_info->client.account_name;
 268         params.domain_name      = user_info->client.domain_name;
 269         params.workstation_name = user_info->workstation_name;
 270
 271         d_fprintf(stderr, "looking up %s@%s logging in from %s\n",
 272                   params.account_name, params.domain_name,
 273                   params.workstation_name);
 274
 275         memcpy(params.password.response.challenge,
 276                ctx->auth_ctx->challenge.data.data,
 277                sizeof(params.password.response.challenge));
 278
 279         params.password.response.lm_length =
 280                 user_info->password.response.lanman.length;
 281         params.password.response.nt_length =
 282                 user_info->password.response.nt.length;
 283
 284         params.password.response.lm_data =
 285                 user_info->password.response.lanman.data;
 286         params.password.response.nt_data =
 287                 user_info->password.response.nt.data;
 288
 289         wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
 290         if (wbc_status == WBC_ERR_AUTH_ERROR) {
 291                 DEBUG(1, ("error was %s (0x%08x)\nerror message was '%s'\n",
 292                       err->nt_string, err->nt_status, err->display_string));
 293
 294                 nt_status = NT_STATUS(err->nt_status);
 295                 wbcFreeMemory(err);
 296                 NT_STATUS_NOT_OK_RETURN(nt_status);
 297         } else if (!WBC_ERROR_IS_OK(wbc_status)) {
 298                 DEBUG(1, ("wbcAuthenticateUserEx: failed with %u - %s\n",
 299                         wbc_status, wbcErrorString(wbc_status)));
 300                 return NT_STATUS_LOGON_FAILURE;
 301         }
 302         nt_status = get_info3_from_wbcAuthUserInfo(mem_ctx, info, &info3);
 303         wbcFreeMemory(info);
 304         NT_STATUS_NOT_OK_RETURN(nt_status);
 305
 306         validation.sam3 = &info3;
 307         nt_status = make_user_info_dc_netlogon_validation(mem_ctx,
 308                                                           user_info->client.account_name,
 309                                                           3, &validation,
 310                                                           true, /* This user was authenticated */
 311                                                           user_info_dc);
 312         return nt_status;
 313
 314 }
 315
 316 static const struct auth_operations winbind_ops = {
 317         .name           = "winbind",
 318         .get_challenge  = auth_get_challenge_not_implemented,
 319         .want_check     = winbind_want_check,
 320         .check_password = winbind_check_password
 321 };
 322
 323 static const struct auth_operations winbind_wbclient_ops = {
 324         .name           = "winbind_wbclient",
 325         .get_challenge  = auth_get_challenge_not_implemented,
 326         .want_check     = winbind_want_check,
 327         .check_password = winbind_check_password_wbclient
 328 };
 329
 330 _PUBLIC_ NTSTATUS auth4_winbind_init(void)
 331 {
 332         NTSTATUS ret;
 333
 334         ret = auth_register(&winbind_ops);
 335         if (!NT_STATUS_IS_OK(ret)) {
 336                 DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
 337                 return ret;
 338         }
 339
 340         ret = auth_register(&winbind_wbclient_ops);
 341         if (!NT_STATUS_IS_OK(ret)) {
 342                 DEBUG(0,("Failed to register 'winbind_wbclient' auth backend!\n"));
 343                 return ret;
 344         }
 345
 346         return NT_STATUS_OK;
 347 }