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_samsync.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/ndr_netlogon.h"
  30 #include "../librpc/gen_ndr/cli_netlogon.h"
  31 #include "../libcli/security/security.h"
  32
  33 /**
  34  * Fix up the delta, dealing with encryption issues so that the final
  35  * callback need only do the printing or application logic
  36  */
  37
  38 static NTSTATUS samsync_fix_delta_array(TALLOC_CTX *mem_ctx,
  39                                         struct netlogon_creds_CredentialState *creds,
  40                                         enum netr_SamDatabaseID database_id,
  41                                         struct netr_DELTA_ENUM_ARRAY *r)
  42 {
  43         NTSTATUS status;
  44         int i;
  45
  46         for (i = 0; i < r->num_deltas; i++) {
  47
  48                 status = samsync_fix_delta(mem_ctx,
  49                                            creds,
  50                                            database_id,
  51                                            &r->delta_enum[i]);
  52                 if (!NT_STATUS_IS_OK(status)) {
  53                         return status;
  54                 }
  55         }
  56
  57         return NT_STATUS_OK;
  58 }
  59
  60 /**
  61  * libnet_samsync_init_context
  62  */
  63
  64 NTSTATUS libnet_samsync_init_context(TALLOC_CTX *mem_ctx,
  65                                      const struct dom_sid *domain_sid,
  66                                      struct samsync_context **ctx_p)
  67 {
  68         struct samsync_context *ctx;
  69
  70         *ctx_p = NULL;
  71
  72         ctx = TALLOC_ZERO_P(mem_ctx, struct samsync_context);
  73         NT_STATUS_HAVE_NO_MEMORY(ctx);
  74
  75         if (domain_sid) {
  76                 ctx->domain_sid = dom_sid_dup(mem_ctx, domain_sid);
  77                 NT_STATUS_HAVE_NO_MEMORY(ctx->domain_sid);
  78
  79                 ctx->domain_sid_str = sid_string_talloc(mem_ctx, ctx->domain_sid);
  80                 NT_STATUS_HAVE_NO_MEMORY(ctx->domain_sid_str);
  81         }
  82
  83         ctx->msg_ctx = messaging_init(ctx, procid_self(),
  84                                       event_context_init(ctx));
  85         NT_STATUS_HAVE_NO_MEMORY(ctx->msg_ctx);
  86
  87         *ctx_p = ctx;
  88
  89         return NT_STATUS_OK;
  90 }
  91
  92 /**
  93  * samsync_database_str
  94  */
  95
  96 static const char *samsync_database_str(enum netr_SamDatabaseID database_id)
  97 {
  98
  99         switch (database_id) {
 100                 case SAM_DATABASE_DOMAIN:
 101                         return "DOMAIN";
 102                 case SAM_DATABASE_BUILTIN:
 103                         return "BUILTIN";
 104                 case SAM_DATABASE_PRIVS:
 105                         return "PRIVS";
 106                 default:
 107                         return "unknown";
 108         }
 109 }
 110
 111 /**
 112  * samsync_debug_str
 113  */
 114
 115 static const char *samsync_debug_str(TALLOC_CTX *mem_ctx,
 116                                      enum net_samsync_mode mode,
 117                                      enum netr_SamDatabaseID database_id)
 118 {
 119         const char *action = NULL;
 120
 121         switch (mode) {
 122                 case NET_SAMSYNC_MODE_DUMP:
 123                         action = "Dumping (to stdout)";
 124                         break;
 125                 case NET_SAMSYNC_MODE_FETCH_PASSDB:
 126                         action = "Fetching (to passdb)";
 127                         break;
 128                 case NET_SAMSYNC_MODE_FETCH_LDIF:
 129                         action = "Fetching (to ldif)";
 130                         break;
 131                 case NET_SAMSYNC_MODE_FETCH_KEYTAB:
 132                         action = "Fetching (to keytab)";
 133                         break;
 134                 default:
 135                         action = "Unknown";
 136                         break;
 137         }
 138
 139         return talloc_asprintf(mem_ctx, "%s %s database",
 140                                 action, samsync_database_str(database_id));
 141 }
 142
 143 /**
 144  * libnet_samsync
 145  */
 146
 147 static void libnet_init_netr_ChangeLogEntry(struct samsync_object *o,
 148                                             struct netr_ChangeLogEntry *e)
 149 {
 150         ZERO_STRUCTP(e);
 151
 152         e->db_index             = o->database_id;
 153         e->delta_type           = o->object_type;
 154
 155         switch (e->delta_type) {
 156                 case NETR_DELTA_DOMAIN:
 157                 case NETR_DELTA_DELETE_GROUP:
 158                 case NETR_DELTA_RENAME_GROUP:
 159                 case NETR_DELTA_DELETE_USER:
 160                 case NETR_DELTA_RENAME_USER:
 161                 case NETR_DELTA_DELETE_ALIAS:
 162                 case NETR_DELTA_RENAME_ALIAS:
 163                 case NETR_DELTA_DELETE_TRUST:
 164                 case NETR_DELTA_DELETE_ACCOUNT:
 165                 case NETR_DELTA_DELETE_SECRET:
 166                 case NETR_DELTA_DELETE_GROUP2:
 167                 case NETR_DELTA_DELETE_USER2:
 168                 case NETR_DELTA_MODIFY_COUNT:
 169                         break;
 170                 case NETR_DELTA_USER:
 171                 case NETR_DELTA_GROUP:
 172                 case NETR_DELTA_GROUP_MEMBER:
 173                 case NETR_DELTA_ALIAS:
 174                 case NETR_DELTA_ALIAS_MEMBER:
 175                         e->object_rid = o->object_identifier.rid;
 176                         break;
 177                 case NETR_DELTA_SECRET:
 178                         e->object.object_name = o->object_identifier.name;
 179                         e->flags = NETR_CHANGELOG_NAME_INCLUDED;
 180                         break;
 181                 case NETR_DELTA_TRUSTED_DOMAIN:
 182                 case NETR_DELTA_ACCOUNT:
 183                 case NETR_DELTA_POLICY:
 184                         e->object.object_sid = o->object_identifier.sid;
 185                         e->flags = NETR_CHANGELOG_SID_INCLUDED;
 186                         break;
 187                 default:
 188                         break;
 189         }
 190 }
 191
 192 /**
 193  * libnet_samsync_delta
 194  */
 195
 196 static NTSTATUS libnet_samsync_delta(TALLOC_CTX *mem_ctx,
 197                                      enum netr_SamDatabaseID database_id,
 198                                      uint64_t *sequence_num,
 199                                      struct samsync_context *ctx,
 200                                      struct netr_ChangeLogEntry *e)
 201 {
 202         NTSTATUS result;
 203         NTSTATUS callback_status;
 204         const char *logon_server = ctx->cli->desthost;
 205         const char *computername = global_myname();
 206         struct netr_Authenticator credential;
 207         struct netr_Authenticator return_authenticator;
 208         uint16_t restart_state = 0;
 209         uint32_t sync_context = 0;
 210
 211         ZERO_STRUCT(return_authenticator);
 212
 213         do {
 214                 struct netr_DELTA_ENUM_ARRAY *delta_enum_array = NULL;
 215
 216                 netlogon_creds_client_authenticator(ctx->cli->dc, &credential);
 217
 218                 if (ctx->single_object_replication &&
 219                     !ctx->force_full_replication) {
 220                         result = rpccli_netr_DatabaseRedo(ctx->cli, mem_ctx,
 221                                                           logon_server,
 222                                                           computername,
 223                                                           &credential,
 224                                                           &return_authenticator,
 225                                                           *e,
 226                                                           0,
 227                                                           &delta_enum_array);
 228                 } else if (!ctx->force_full_replication &&
 229                            sequence_num && (*sequence_num > 0)) {
 230                         result = rpccli_netr_DatabaseDeltas(ctx->cli, mem_ctx,
 231                                                             logon_server,
 232                                                             computername,
 233                                                             &credential,
 234                                                             &return_authenticator,
 235                                                             database_id,
 236                                                             sequence_num,
 237                                                             &delta_enum_array,
 238                                                             0xffff);
 239                 } else {
 240                         result = rpccli_netr_DatabaseSync2(ctx->cli, mem_ctx,
 241                                                            logon_server,
 242                                                            computername,
 243                                                            &credential,
 244                                                            &return_authenticator,
 245                                                            database_id,
 246                                                            restart_state,
 247                                                            &sync_context,
 248                                                            &delta_enum_array,
 249                                                            0xffff);
 250                 }
 251
 252                 if (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) {
 253                         return result;
 254                 }
 255
 256                 /* Check returned credentials. */
 257                 if (!netlogon_creds_client_check(ctx->cli->dc,
 258                                                  &return_authenticator.cred)) {
 259                         DEBUG(0,("credentials chain check failed\n"));
 260                         return NT_STATUS_ACCESS_DENIED;
 261                 }
 262
 263                 if (NT_STATUS_IS_ERR(result)) {
 264                         break;
 265                 }
 266
 267                 samsync_fix_delta_array(mem_ctx,
 268                                         ctx->cli->dc,
 269                                         database_id,
 270                                         delta_enum_array);
 271
 272                 /* Process results */
 273                 callback_status = ctx->ops->process_objects(mem_ctx, database_id,
 274                                                             delta_enum_array,
 275                                                             sequence_num,
 276                                                             ctx);
 277                 if (!NT_STATUS_IS_OK(callback_status)) {
 278                         result = callback_status;
 279                         goto out;
 280                 }
 281
 282                 TALLOC_FREE(delta_enum_array);
 283
 284         } while (NT_STATUS_EQUAL(result, STATUS_MORE_ENTRIES));
 285
 286  out:
 287
 288         return result;
 289 }
 290
 291 /**
 292  * libnet_samsync
 293  */
 294
 295 NTSTATUS libnet_samsync(enum netr_SamDatabaseID database_id,
 296                         struct samsync_context *ctx)
 297 {
 298         NTSTATUS status = NT_STATUS_OK;
 299         NTSTATUS callback_status;
 300         TALLOC_CTX *mem_ctx;
 301         const char *debug_str;
 302         uint64_t sequence_num = 0;
 303         int i = 0;
 304
 305         if (!(mem_ctx = talloc_new(ctx))) {
 306                 return NT_STATUS_NO_MEMORY;
 307         }
 308
 309         if (!ctx->ops) {
 310                 return NT_STATUS_INVALID_PARAMETER;
 311         }
 312
 313         if (ctx->ops->startup) {
 314                 status = ctx->ops->startup(mem_ctx, ctx,
 315                                            database_id, &sequence_num);
 316                 if (!NT_STATUS_IS_OK(status)) {
 317                         goto done;
 318                 }
 319         }
 320
 321         debug_str = samsync_debug_str(mem_ctx, ctx->mode, database_id);
 322         if (debug_str) {
 323                 d_fprintf(stderr, "%s\n", debug_str);
 324         }
 325
 326         if (!ctx->single_object_replication) {
 327                 status = libnet_samsync_delta(mem_ctx, database_id,
 328                                               &sequence_num, ctx, NULL);
 329                 goto done;
 330         }
 331
 332         for (i=0; i<ctx->num_objects; i++) {
 333
 334                 struct netr_ChangeLogEntry e;
 335
 336                 if (ctx->objects[i].database_id != database_id) {
 337                         continue;
 338                 }
 339
 340                 libnet_init_netr_ChangeLogEntry(&ctx->objects[i], &e);
 341
 342                 status = libnet_samsync_delta(mem_ctx, database_id,
 343                                               &sequence_num, ctx, &e);
 344                 if (!NT_STATUS_IS_OK(status)) {
 345                         goto done;
 346                 }
 347         }
 348
 349  done:
 350
 351         if (NT_STATUS_IS_OK(status) && ctx->ops->finish) {
 352                 callback_status = ctx->ops->finish(mem_ctx, ctx,
 353                                                    database_id, sequence_num);
 354                 if (!NT_STATUS_IS_OK(callback_status)) {
 355                         status = callback_status;
 356                 }
 357         }
 358
 359         if (NT_STATUS_IS_ERR(status) && !ctx->error_message) {
 360
 361                 ctx->error_message = talloc_asprintf(ctx,
 362                         "Failed to fetch %s database: %s",
 363                         samsync_database_str(database_id),
 364                         nt_errstr(status));
 365
 366                 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
 367
 368                         ctx->error_message =
 369                                 talloc_asprintf_append(ctx->error_message,
 370                                         "\nPerhaps %s is a Windows native mode domain?",
 371                                         ctx->domain_name);
 372                 }
 373         }
 374
 375         talloc_destroy(mem_ctx);
 376
 377         return status;
 378 }
 379
 380 /**
 381  * pull_netr_AcctLockStr
 382  */
 383
 384 NTSTATUS pull_netr_AcctLockStr(TALLOC_CTX *mem_ctx,
 385                                struct lsa_BinaryString *r,
 386                                struct netr_AcctLockStr **str_p)
 387 {
 388         struct netr_AcctLockStr *str;
 389         enum ndr_err_code ndr_err;
 390         DATA_BLOB blob;
 391
 392         if (!mem_ctx || !r || !str_p) {
 393                 return NT_STATUS_INVALID_PARAMETER;
 394         }
 395
 396         *str_p = NULL;
 397
 398         str = TALLOC_ZERO_P(mem_ctx, struct netr_AcctLockStr);
 399         if (!str) {
 400                 return NT_STATUS_NO_MEMORY;
 401         }
 402
 403         blob = data_blob_const(r->array, r->length);
 404
 405         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, str,
 406                        (ndr_pull_flags_fn_t)ndr_pull_netr_AcctLockStr);
 407
 408         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 409                 return ndr_map_error2ntstatus(ndr_err);
 410         }
 411
 412         *str_p = str;
 413
 414         return NT_STATUS_OK;
 415 }
 416