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 "librpc/gen_ndr/ndr_winbind_c.h"
  28 #include "lib/messaging/irpc.h"
  29 #include "param/param.h"
  30 #include "nsswitch/libwbclient/wbclient.h"
  31 #include "auth/auth_sam_reply.h"
  32 #include "libcli/security/security.h"
  33 #include "dsdb/samdb/samdb.h"
  34
  35 _PUBLIC_ NTSTATUS auth4_winbind_init(void);
  36
  37 static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
  38                                    TALLOC_CTX *mem_ctx,
  39                                    const struct auth_usersupplied_info *user_info)
  40 {
  41         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
  42                 return NT_STATUS_NOT_IMPLEMENTED;
  43         }
  44
  45         /* TODO: maybe limit the user scope to remote users only */
  46         return NT_STATUS_OK;
  47 }
  48
  49 static NTSTATUS winbind_rodc_want_check(struct auth_method_context *ctx,
  50                                         TALLOC_CTX *mem_ctx,
  51                                         const struct auth_usersupplied_info *user_info)
  52 {
  53         int ret;
  54         bool am_rodc;
  55
  56         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
  57                 return NT_STATUS_NOT_IMPLEMENTED;
  58         }
  59
  60         if (ctx->auth_ctx->sam_ctx == NULL) {
  61                 DBG_ERR("ctx->auth_ctx->sam_ctx == NULL, don't check.\n");
  62                 return NT_STATUS_NOT_IMPLEMENTED;
  63         }
  64
  65         ret = samdb_rodc(ctx->auth_ctx->sam_ctx, &am_rodc);
  66         if (ret != LDB_SUCCESS) {
  67                 DBG_ERR("samdb_rodc() failed %d %s, don't check.\n",
  68                         ret, ldb_errstring(ctx->auth_ctx->sam_ctx));
  69                 return NT_STATUS_NOT_IMPLEMENTED;
  70         }
  71
  72         if (!am_rodc) {
  73                 /*
  74                  * We don't support trusts yet and we
  75                  * don't want to add them using the
  76                  * semi-async irpc call that uses
  77                  * a nested event loop.
  78                  */
  79                 return NT_STATUS_NOT_IMPLEMENTED;
  80         }
  81
  82         /*
  83          * We're a RODC, so we forward the request to our winbind.
  84          * As the RODC is not yet production ready anyway, we keep
  85          * the semi-async behavior with nested event loops in order
  86          * to keep autobuild happy.
  87          */
  88         return NT_STATUS_OK;
  89 }
  90
  91 struct winbind_check_password_state {
  92         struct winbind_SamLogon req;
  93 };
  94
  95 /*
  96  Authenticate a user with a challenge/response
  97  using IRPC to the winbind task
  98 */
  99 static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
 100                                        TALLOC_CTX *mem_ctx,
 101                                        const struct auth_usersupplied_info *user_info,
 102                                        struct auth_user_info_dc **user_info_dc)
 103 {
 104         NTSTATUS status;
 105         struct dcerpc_binding_handle *irpc_handle;
 106         struct winbind_check_password_state *s;
 107         const struct auth_usersupplied_info *user_info_new;
 108         struct netr_IdentityInfo *identity_info;
 109
 110         if (!ctx->auth_ctx->msg_ctx) {
 111                 DEBUG(0,("winbind_check_password: auth_context_create was called with out messaging context\n"));
 112                 return NT_STATUS_INTERNAL_ERROR;
 113         }
 114
 115         s = talloc(mem_ctx, struct winbind_check_password_state);
 116         NT_STATUS_HAVE_NO_MEMORY(s);
 117
 118         irpc_handle = irpc_binding_handle_by_name(s, ctx->auth_ctx->msg_ctx,
 119                                                   "winbind_server",
 120                                                   &ndr_table_winbind);
 121         if (irpc_handle == NULL) {
 122                 DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, "
 123                           "no winbind_server running!\n",
 124                           user_info->client.domain_name, user_info->client.account_name));
 125                 return NT_STATUS_NO_LOGON_SERVERS;
 126         }
 127
 128         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
 129                 struct netr_PasswordInfo *password_info;
 130
 131                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_HASH,
 132                                            user_info, &user_info_new);
 133                 NT_STATUS_NOT_OK_RETURN(status);
 134                 user_info = user_info_new;
 135
 136                 password_info = talloc(s, struct netr_PasswordInfo);
 137                 NT_STATUS_HAVE_NO_MEMORY(password_info);
 138
 139                 password_info->lmpassword = *user_info->password.hash.lanman;
 140                 password_info->ntpassword = *user_info->password.hash.nt;
 141
 142                 identity_info = &password_info->identity_info;
 143                 s->req.in.logon_level   = 1;
 144                 s->req.in.logon.password= password_info;
 145         } else {
 146                 struct netr_NetworkInfo *network_info;
 147                 uint8_t chal[8];
 148
 149                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
 150                                            user_info, &user_info_new);
 151                 NT_STATUS_NOT_OK_RETURN(status);
 152                 user_info = user_info_new;
 153
 154                 network_info = talloc(s, struct netr_NetworkInfo);
 155                 NT_STATUS_HAVE_NO_MEMORY(network_info);
 156
 157                 status = auth_get_challenge(ctx->auth_ctx, chal);
 158                 NT_STATUS_NOT_OK_RETURN(status);
 159
 160                 memcpy(network_info->challenge, chal, sizeof(network_info->challenge));
 161
 162                 network_info->nt.length = user_info->password.response.nt.length;
 163                 network_info->nt.data   = user_info->password.response.nt.data;
 164
 165                 network_info->lm.length = user_info->password.response.lanman.length;
 166                 network_info->lm.data   = user_info->password.response.lanman.data;
 167
 168                 identity_info = &network_info->identity_info;
 169                 s->req.in.logon_level   = 2;
 170                 s->req.in.logon.network = network_info;
 171         }
 172
 173         identity_info->domain_name.string       = user_info->client.domain_name;
 174         identity_info->parameter_control        = user_info->logon_parameters; /* see MSV1_0_* */
 175         identity_info->logon_id_low             = 0;
 176         identity_info->logon_id_high            = 0;
 177         identity_info->account_name.string      = user_info->client.account_name;
 178         identity_info->workstation.string       = user_info->workstation_name;
 179
 180         s->req.in.validation_level      = 3;
 181
 182         /* Note: this makes use of nested event loops... */
 183         dcerpc_binding_handle_set_sync_ev(irpc_handle, ctx->auth_ctx->event_ctx);
 184         status = dcerpc_winbind_SamLogon_r(irpc_handle, s, &s->req);
 185         NT_STATUS_NOT_OK_RETURN(status);
 186
 187         if (NT_STATUS_EQUAL(s->req.out.result, NT_STATUS_NO_SUCH_USER) &&
 188             !s->req.out.authoritative) {
 189                 return NT_STATUS_NOT_IMPLEMENTED;
 190         }
 191
 192         status = make_user_info_dc_netlogon_validation(mem_ctx,
 193                                                       user_info->client.account_name,
 194                                                       s->req.in.validation_level,
 195                                                       &s->req.out.validation,
 196                                                        true, /* This user was authenticated */
 197                                                       user_info_dc);
 198         NT_STATUS_NOT_OK_RETURN(status);
 199
 200         return NT_STATUS_OK;
 201 }
 202
 203 /*
 204  Authenticate a user with a challenge/response
 205  using the samba3 winbind protocol via libwbclient
 206 */
 207 static NTSTATUS winbind_check_password_wbclient(struct auth_method_context *ctx,
 208                                                 TALLOC_CTX *mem_ctx,
 209                                                 const struct auth_usersupplied_info *user_info,
 210                                                 struct auth_user_info_dc **user_info_dc)
 211 {
 212         struct wbcAuthUserParams params;
 213         struct wbcAuthUserInfo *info = NULL;
 214         struct wbcAuthErrorInfo *err = NULL;
 215         wbcErr wbc_status;
 216         NTSTATUS nt_status;
 217         struct netr_SamInfo6 *info6 = NULL;
 218         union netr_Validation validation;
 219
 220         /* Send off request */
 221         const struct auth_usersupplied_info *user_info_temp;
 222         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 223                                       AUTH_PASSWORD_RESPONSE,
 224                                       user_info, &user_info_temp);
 225         if (!NT_STATUS_IS_OK(nt_status)) {
 226                 return nt_status;
 227         }
 228         user_info = user_info_temp;
 229
 230         ZERO_STRUCT(params);
 231         ZERO_STRUCT(validation);
 232         /*params.flags = WBFLAG_PAM_INFO3_NDR;*/
 233
 234         params.parameter_control = user_info->logon_parameters;
 235         params.parameter_control |= WBC_MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT |
 236                                     WBC_MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT;
 237         params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
 238
 239         params.account_name     = user_info->client.account_name;
 240         params.domain_name      = user_info->client.domain_name;
 241         params.workstation_name = user_info->workstation_name;
 242
 243         DEBUG(5,("looking up %s@%s logging in from %s\n",
 244                   params.account_name, params.domain_name,
 245                   params.workstation_name));
 246
 247         memcpy(params.password.response.challenge,
 248                ctx->auth_ctx->challenge.data.data,
 249                sizeof(params.password.response.challenge));
 250
 251         params.password.response.lm_length =
 252                 user_info->password.response.lanman.length;
 253         params.password.response.nt_length =
 254                 user_info->password.response.nt.length;
 255
 256         params.password.response.lm_data =
 257                 user_info->password.response.lanman.data;
 258         params.password.response.nt_data =
 259                 user_info->password.response.nt.data;
 260
 261         wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
 262         if (wbc_status == WBC_ERR_AUTH_ERROR) {
 263                 if (err) {
 264                         DEBUG(1, ("error was %s (0x%08x)\nerror message was '%s'\n",
 265                               err->nt_string, err->nt_status, err->display_string));
 266                         nt_status = NT_STATUS(err->nt_status);
 267                         wbcFreeMemory(err);
 268                 } else {
 269                         nt_status = NT_STATUS_LOGON_FAILURE;
 270                 }
 271                 NT_STATUS_NOT_OK_RETURN(nt_status);
 272         } else if (!WBC_ERROR_IS_OK(wbc_status)) {
 273                 DEBUG(1, ("wbcAuthenticateUserEx: failed with %u - %s\n",
 274                         wbc_status, wbcErrorString(wbc_status)));
 275                 if (err) {
 276                         DEBUG(1, ("error was %s (0x%08x)\nerror message was '%s'\n",
 277                               err->nt_string, err->nt_status, err->display_string));
 278                 }
 279                 return NT_STATUS_LOGON_FAILURE;
 280         }
 281         info6 = wbcAuthUserInfo_to_netr_SamInfo6(mem_ctx, info);
 282         wbcFreeMemory(info);
 283         if (!info6) {
 284                 DEBUG(1, ("wbcAuthUserInfo_to_netr_SamInfo6 failed\n"));
 285                 return NT_STATUS_NO_MEMORY;
 286         }
 287
 288         validation.sam6 = info6;
 289         nt_status = make_user_info_dc_netlogon_validation(mem_ctx,
 290                                                           user_info->client.account_name,
 291                                                           6, &validation,
 292                                                           true, /* This user was authenticated */
 293                                                           user_info_dc);
 294         return nt_status;
 295
 296 }
 297
 298 static const struct auth_operations winbind_ops = {
 299         .name           = "winbind",
 300         .want_check     = winbind_want_check,
 301         .check_password = winbind_check_password
 302 };
 303
 304 static const struct auth_operations winbind_rodc_ops = {
 305         .name           = "winbind_rodc",
 306         .want_check     = winbind_rodc_want_check,
 307         .check_password = winbind_check_password
 308 };
 309
 310 static const struct auth_operations winbind_wbclient_ops = {
 311         .name           = "winbind_wbclient",
 312         .want_check     = winbind_want_check,
 313         .check_password = winbind_check_password_wbclient
 314 };
 315
 316 _PUBLIC_ NTSTATUS auth4_winbind_init(void)
 317 {
 318         NTSTATUS ret;
 319
 320         ret = auth_register(&winbind_ops);
 321         if (!NT_STATUS_IS_OK(ret)) {
 322                 DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
 323                 return ret;
 324         }
 325
 326         ret = auth_register(&winbind_rodc_ops);
 327         if (!NT_STATUS_IS_OK(ret)) {
 328                 DEBUG(0,("Failed to register 'winbind_rodc' auth backend!\n"));
 329                 return ret;
 330         }
 331
 332         ret = auth_register(&winbind_wbclient_ops);
 333         if (!NT_STATUS_IS_OK(ret)) {
 334                 DEBUG(0,("Failed to register 'winbind_wbclient' auth backend!\n"));
 335                 return ret;
 336         }
 337
 338         return NT_STATUS_OK;
 339 }