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