source3/libnet/libnet_samsync.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Extract the user/system database from a remote SamSync server
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   7    Copyright (C) Guenther Deschner <gd@samba.org> 2008
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23
  24 #include "includes.h"
  25 #include "libnet/libnet.h"
  26 #include "../lib/crypto/crypto.h"
  27 #include "../libcli/samsync/samsync.h"
  28 #include "../libcli/auth/libcli_auth.h"
  29 #include "../librpc/gen_ndr/cli_netlogon.h"
  30
  31 /**
  32  * Fix up the delta, dealing with encryption issues so that the final
  33  * callback need only do the printing or application logic
  34  */
  35
  36 static NTSTATUS samsync_fix_delta_array(TALLOC_CTX *mem_ctx,
  37                                         struct netlogon_creds_CredentialState *creds,
  38                                         enum netr_SamDatabaseID database_id,
  39                                         struct netr_DELTA_ENUM_ARRAY *r)
  40 {
  41         NTSTATUS status;
  42         int i;
  43
  44         for (i = 0; i < r->num_deltas; i++) {
  45
  46                 status = samsync_fix_delta(mem_ctx,
  47                                            creds,
  48                                            database_id,
  49                                            &r->delta_enum[i]);
  50                 if (!NT_STATUS_IS_OK(status)) {
  51                         return status;
  52                 }
  53         }
  54
  55         return NT_STATUS_OK;
  56 }
  57
  58 /**
  59  * libnet_samsync_init_context
  60  */
  61
  62 NTSTATUS libnet_samsync_init_context(TALLOC_CTX *mem_ctx,
  63                                      const struct dom_sid *domain_sid,
  64                                      struct samsync_context **ctx_p)
  65 {
  66         struct samsync_context *ctx;
  67
  68         *ctx_p = NULL;
  69
  70         ctx = TALLOC_ZERO_P(mem_ctx, struct samsync_context);
  71         NT_STATUS_HAVE_NO_MEMORY(ctx);
  72
  73         if (domain_sid) {
  74                 ctx->domain_sid = sid_dup_talloc(mem_ctx, domain_sid);
  75                 NT_STATUS_HAVE_NO_MEMORY(ctx->domain_sid);
  76
  77                 ctx->domain_sid_str = sid_string_talloc(mem_ctx, ctx->domain_sid);
  78                 NT_STATUS_HAVE_NO_MEMORY(ctx->domain_sid_str);
  79         }
  80
  81         *ctx_p = ctx;
  82
  83         return NT_STATUS_OK;
  84 }
  85
  86 /**
  87  * samsync_database_str
  88  */
  89
  90 static const char *samsync_database_str(enum netr_SamDatabaseID database_id)
  91 {
  92
  93         switch (database_id) {
  94                 case SAM_DATABASE_DOMAIN:
  95                         return "DOMAIN";
  96                 case SAM_DATABASE_BUILTIN:
  97                         return "BUILTIN";
  98                 case SAM_DATABASE_PRIVS:
  99                         return "PRIVS";
 100                 default:
 101                         return "unknown";
 102         }
 103 }
 104
 105 /**
 106  * samsync_debug_str
 107  */
 108
 109 static const char *samsync_debug_str(TALLOC_CTX *mem_ctx,
 110                                      enum net_samsync_mode mode,
 111                                      enum netr_SamDatabaseID database_id)
 112 {
 113         const char *action = NULL;
 114
 115         switch (mode) {
 116                 case NET_SAMSYNC_MODE_DUMP:
 117                         action = "Dumping (to stdout)";
 118                         break;
 119                 case NET_SAMSYNC_MODE_FETCH_PASSDB:
 120                         action = "Fetching (to passdb)";
 121                         break;
 122                 case NET_SAMSYNC_MODE_FETCH_LDIF:
 123                         action = "Fetching (to ldif)";
 124                         break;
 125                 case NET_SAMSYNC_MODE_FETCH_KEYTAB:
 126                         action = "Fetching (to keytab)";
 127                         break;
 128                 default:
 129                         action = "Unknown";
 130                         break;
 131         }
 132
 133         return talloc_asprintf(mem_ctx, "%s %s database",
 134                                 action, samsync_database_str(database_id));
 135 }
 136
 137 /**
 138  * libnet_samsync
 139  */
 140
 141 static void libnet_init_netr_ChangeLogEntry(struct samsync_object *o,
 142                                             struct netr_ChangeLogEntry *e)
 143 {
 144         ZERO_STRUCTP(e);
 145
 146         e->db_index             = o->database_id;
 147         e->delta_type           = o->object_type;
 148
 149         switch (e->delta_type) {
 150                 case NETR_DELTA_DOMAIN:
 151                 case NETR_DELTA_DELETE_GROUP:
 152                 case NETR_DELTA_RENAME_GROUP:
 153                 case NETR_DELTA_DELETE_USER:
 154                 case NETR_DELTA_RENAME_USER:
 155                 case NETR_DELTA_DELETE_ALIAS:
 156                 case NETR_DELTA_RENAME_ALIAS:
 157                 case NETR_DELTA_DELETE_TRUST:
 158                 case NETR_DELTA_DELETE_ACCOUNT:
 159                 case NETR_DELTA_DELETE_SECRET:
 160                 case NETR_DELTA_DELETE_GROUP2:
 161                 case NETR_DELTA_DELETE_USER2:
 162                 case NETR_DELTA_MODIFY_COUNT:
 163                         break;
 164                 case NETR_DELTA_USER:
 165                 case NETR_DELTA_GROUP:
 166                 case NETR_DELTA_GROUP_MEMBER:
 167                 case NETR_DELTA_ALIAS:
 168                 case NETR_DELTA_ALIAS_MEMBER:
 169                         e->object_rid = o->object_identifier.rid;
 170                         break;
 171                 case NETR_DELTA_SECRET:
 172                         e->object.object_name = o->object_identifier.name;
 173                         e->flags = NETR_CHANGELOG_NAME_INCLUDED;
 174                         break;
 175                 case NETR_DELTA_TRUSTED_DOMAIN:
 176                 case NETR_DELTA_ACCOUNT:
 177                 case NETR_DELTA_POLICY:
 178                         e->object.object_sid = o->object_identifier.sid;
 179                         e->flags = NETR_CHANGELOG_SID_INCLUDED;
 180                         break;
 181                 default:
 182                         break;
 183         }
 184 }
 185
 186 /**
 187  * libnet_samsync_delta
 188  */
 189
 190 static NTSTATUS libnet_samsync_delta(TALLOC_CTX *mem_ctx,
 191                                      enum netr_SamDatabaseID database_id,
 192                                      uint64_t *sequence_num,
 193                                      struct samsync_context *ctx,
 194                                      struct netr_ChangeLogEntry *e)
 195 {
 196         NTSTATUS result;
 197         NTSTATUS callback_status;
 198         const char *logon_server = ctx->cli->desthost;
 199         const char *computername = global_myname();
 200         struct netr_Authenticator credential;
 201         struct netr_Authenticator return_authenticator;
 202         uint16_t restart_state = 0;
 203         uint32_t sync_context = 0;
 204
 205         ZERO_STRUCT(return_authenticator);
 206
 207         do {
 208                 struct netr_DELTA_ENUM_ARRAY *delta_enum_array = NULL;
 209
 210                 netlogon_creds_client_authenticator(ctx->cli->dc, &credential);
 211
 212                 if (ctx->single_object_replication &&
 213                     !ctx->force_full_replication) {
 214                         result = rpccli_netr_DatabaseRedo(ctx->cli, mem_ctx,
 215                                                           logon_server,
 216                                                           computername,
 217                                                           &credential,
 218                                                           &return_authenticator,
 219                                                           *e,
 220                                                           0,
 221                                                           &delta_enum_array);
 222                 } else if (!ctx->force_full_replication &&
 223                            sequence_num && (*sequence_num > 0)) {
 224                         result = rpccli_netr_DatabaseDeltas(ctx->cli, mem_ctx,
 225                                                             logon_server,
 226                                                             computername,
 227                                                             &credential,
 228                                                             &return_authenticator,
 229                                                             database_id,
 230                                                             sequence_num,
 231                                                             &delta_enum_array,
 232                                                             0xffff);
 233                 } else {
 234                         result = rpccli_netr_DatabaseSync2(ctx->cli, mem_ctx,
 235                                                            logon_server,
 236                                                            computername,
 237                                                            &credential,
 238                                                            &return_authenticator,
 239                                                            database_id,
 240                                                            restart_state,
 241                                                            &sync_context,
 242                                                            &delta_enum_array,
 243                                                            0xffff);
 244                 }
 245
 246                 if (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) {
 247                         return result;
 248                 }
 249
 250                 /* Check returned credentials. */
 251                 if (!netlogon_creds_client_check(ctx->cli->dc,
 252                                                  &return_authenticator.cred)) {
 253                         DEBUG(0,("credentials chain check failed\n"));
 254                         return NT_STATUS_ACCESS_DENIED;
 255                 }
 256
 257                 if (NT_STATUS_IS_ERR(result)) {
 258                         break;
 259                 }
 260
 261                 samsync_fix_delta_array(mem_ctx,
 262                                         ctx->cli->dc,
 263                                         database_id,
 264                                         delta_enum_array);
 265
 266                 /* Process results */
 267                 callback_status = ctx->ops->process_objects(mem_ctx, database_id,
 268                                                             delta_enum_array,
 269                                                             sequence_num,
 270                                                             ctx);
 271                 if (!NT_STATUS_IS_OK(callback_status)) {
 272                         result = callback_status;
 273                         goto out;
 274                 }
 275
 276                 TALLOC_FREE(delta_enum_array);
 277
 278         } while (NT_STATUS_EQUAL(result, STATUS_MORE_ENTRIES));
 279
 280  out:
 281
 282         return result;
 283 }
 284
 285 /**
 286  * libnet_samsync
 287  */
 288
 289 NTSTATUS libnet_samsync(enum netr_SamDatabaseID database_id,
 290                         struct samsync_context *ctx)
 291 {
 292         NTSTATUS status = NT_STATUS_OK;
 293         NTSTATUS callback_status;
 294         TALLOC_CTX *mem_ctx;
 295         const char *debug_str;
 296         uint64_t sequence_num = 0;
 297         int i = 0;
 298
 299         if (!(mem_ctx = talloc_new(ctx))) {
 300                 return NT_STATUS_NO_MEMORY;
 301         }
 302
 303         if (!ctx->ops) {
 304                 return NT_STATUS_INVALID_PARAMETER;
 305         }
 306
 307         if (ctx->ops->startup) {
 308                 status = ctx->ops->startup(mem_ctx, ctx,
 309                                            database_id, &sequence_num);
 310                 if (!NT_STATUS_IS_OK(status)) {
 311                         goto done;
 312                 }
 313         }
 314
 315         debug_str = samsync_debug_str(mem_ctx, ctx->mode, database_id);
 316         if (debug_str) {
 317                 d_fprintf(stderr, "%s\n", debug_str);
 318         }
 319
 320         if (!ctx->single_object_replication) {
 321                 status = libnet_samsync_delta(mem_ctx, database_id,
 322                                               &sequence_num, ctx, NULL);
 323                 goto done;
 324         }
 325
 326         for (i=0; i<ctx->num_objects; i++) {
 327
 328                 struct netr_ChangeLogEntry e;
 329
 330                 if (ctx->objects[i].database_id != database_id) {
 331                         continue;
 332                 }
 333
 334                 libnet_init_netr_ChangeLogEntry(&ctx->objects[i], &e);
 335
 336                 status = libnet_samsync_delta(mem_ctx, database_id,
 337                                               &sequence_num, ctx, &e);
 338                 if (!NT_STATUS_IS_OK(status)) {
 339                         goto done;
 340                 }
 341         }
 342
 343  done:
 344
 345         if (NT_STATUS_IS_OK(status) && ctx->ops->finish) {
 346                 callback_status = ctx->ops->finish(mem_ctx, ctx,
 347                                                    database_id, sequence_num);
 348                 if (!NT_STATUS_IS_OK(callback_status)) {
 349                         status = callback_status;
 350                 }
 351         }
 352
 353         if (NT_STATUS_IS_ERR(status) && !ctx->error_message) {
 354
 355                 ctx->error_message = talloc_asprintf(ctx,
 356                         "Failed to fetch %s database: %s",
 357                         samsync_database_str(database_id),
 358                         nt_errstr(status));
 359
 360                 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
 361
 362                         ctx->error_message =
 363                                 talloc_asprintf_append(ctx->error_message,
 364                                         "\nPerhaps %s is a Windows native mode domain?",
 365                                         ctx->domain_name);
 366                 }
 367         }
 368
 369         talloc_destroy(mem_ctx);
 370
 371         return status;
 372 }
 373
 374 /**
 375  * pull_netr_AcctLockStr
 376  */
 377
 378 NTSTATUS pull_netr_AcctLockStr(TALLOC_CTX *mem_ctx,
 379                                struct lsa_BinaryString *r,
 380                                struct netr_AcctLockStr **str_p)
 381 {
 382         struct netr_AcctLockStr *str;
 383         enum ndr_err_code ndr_err;
 384         DATA_BLOB blob;
 385
 386         if (!mem_ctx || !r || !str_p) {
 387                 return NT_STATUS_INVALID_PARAMETER;
 388         }
 389
 390         *str_p = NULL;
 391
 392         str = TALLOC_ZERO_P(mem_ctx, struct netr_AcctLockStr);
 393         if (!str) {
 394                 return NT_STATUS_NO_MEMORY;
 395         }
 396
 397         blob = data_blob_const(r->array, r->length);
 398
 399         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, str,
 400                        (ndr_pull_flags_fn_t)ndr_pull_netr_AcctLockStr);
 401
 402         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 403                 return ndr_map_error2ntstatus(ndr_err);
 404         }
 405
 406         *str_p = str;
 407
 408         return NT_STATUS_OK;
 409 }
 410