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 "rpc_client/rpc_client.h"
  30 #include "../librpc/gen_ndr/ndr_netlogon.h"
  31 #include "../librpc/gen_ndr/ndr_netlogon_c.h"
  32 #include "../libcli/security/security.h"
  33 #include "messages.h"
  34
  35 /**
  36  * Fix up the delta, dealing with encryption issues so that the final
  37  * callback need only do the printing or application logic
  38  */
  39
  40 static NTSTATUS samsync_fix_delta_array(TALLOC_CTX *mem_ctx,
  41                                         struct netlogon_creds_CredentialState *creds,
  42                                         enum netr_SamDatabaseID database_id,
  43                                         struct netr_DELTA_ENUM_ARRAY *r)
  44 {
  45         NTSTATUS status;
  46         int i;
  47
  48         for (i = 0; i < r->num_deltas; i++) {
  49
  50                 status = samsync_fix_delta(mem_ctx,
  51                                            creds,
  52                                            database_id,
  53                                            &r->delta_enum[i]);
  54                 if (!NT_STATUS_IS_OK(status)) {
  55                         return status;
  56                 }
  57         }
  58
  59         return NT_STATUS_OK;
  60 }
  61
  62 /**
  63  * libnet_samsync_init_context
  64  */
  65
  66 NTSTATUS libnet_samsync_init_context(TALLOC_CTX *mem_ctx,
  67                                      const struct dom_sid *domain_sid,
  68                                      struct samsync_context **ctx_p)
  69 {
  70         struct samsync_context *ctx;
  71
  72         *ctx_p = NULL;
  73
  74         ctx = TALLOC_ZERO_P(mem_ctx, struct samsync_context);
  75         NT_STATUS_HAVE_NO_MEMORY(ctx);
  76
  77         if (domain_sid) {
  78                 ctx->domain_sid = dom_sid_dup(mem_ctx, domain_sid);
  79                 NT_STATUS_HAVE_NO_MEMORY(ctx->domain_sid);
  80
  81                 ctx->domain_sid_str = sid_string_talloc(mem_ctx, ctx->domain_sid);
  82                 NT_STATUS_HAVE_NO_MEMORY(ctx->domain_sid_str);
  83         }
  84
  85         ctx->msg_ctx = messaging_init(ctx, procid_self(),
  86                                       event_context_init(ctx));
  87         NT_STATUS_HAVE_NO_MEMORY(ctx->msg_ctx);
  88
  89         *ctx_p = ctx;
  90
  91         return NT_STATUS_OK;
  92 }
  93
  94 /**
  95  * samsync_database_str
  96  */
  97
  98 static const char *samsync_database_str(enum netr_SamDatabaseID database_id)
  99 {
 100
 101         switch (database_id) {
 102                 case SAM_DATABASE_DOMAIN:
 103                         return "DOMAIN";
 104                 case SAM_DATABASE_BUILTIN:
 105                         return "BUILTIN";
 106                 case SAM_DATABASE_PRIVS:
 107                         return "PRIVS";
 108                 default:
 109                         return "unknown";
 110         }
 111 }
 112
 113 /**
 114  * samsync_debug_str
 115  */
 116
 117 static const char *samsync_debug_str(TALLOC_CTX *mem_ctx,
 118                                      enum net_samsync_mode mode,
 119                                      enum netr_SamDatabaseID database_id)
 120 {
 121         const char *action = NULL;
 122
 123         switch (mode) {
 124                 case NET_SAMSYNC_MODE_DUMP:
 125                         action = "Dumping (to stdout)";
 126                         break;
 127                 case NET_SAMSYNC_MODE_FETCH_PASSDB:
 128                         action = "Fetching (to passdb)";
 129                         break;
 130                 case NET_SAMSYNC_MODE_FETCH_LDIF:
 131                         action = "Fetching (to ldif)";
 132                         break;
 133                 case NET_SAMSYNC_MODE_FETCH_KEYTAB:
 134                         action = "Fetching (to keytab)";
 135                         break;
 136                 default:
 137                         action = "Unknown";
 138                         break;
 139         }
 140
 141         return talloc_asprintf(mem_ctx, "%s %s database",
 142                                 action, samsync_database_str(database_id));
 143 }
 144
 145 /**
 146  * libnet_samsync
 147  */
 148
 149 static void libnet_init_netr_ChangeLogEntry(struct samsync_object *o,
 150                                             struct netr_ChangeLogEntry *e)
 151 {
 152         ZERO_STRUCTP(e);
 153
 154         e->db_index             = o->database_id;
 155         e->delta_type           = o->object_type;
 156
 157         switch (e->delta_type) {
 158                 case NETR_DELTA_DOMAIN:
 159                 case NETR_DELTA_DELETE_GROUP:
 160                 case NETR_DELTA_RENAME_GROUP:
 161                 case NETR_DELTA_DELETE_USER:
 162                 case NETR_DELTA_RENAME_USER:
 163                 case NETR_DELTA_DELETE_ALIAS:
 164                 case NETR_DELTA_RENAME_ALIAS:
 165                 case NETR_DELTA_DELETE_TRUST:
 166                 case NETR_DELTA_DELETE_ACCOUNT:
 167                 case NETR_DELTA_DELETE_SECRET:
 168                 case NETR_DELTA_DELETE_GROUP2:
 169                 case NETR_DELTA_DELETE_USER2:
 170                 case NETR_DELTA_MODIFY_COUNT:
 171                         break;
 172                 case NETR_DELTA_USER:
 173                 case NETR_DELTA_GROUP:
 174                 case NETR_DELTA_GROUP_MEMBER:
 175                 case NETR_DELTA_ALIAS:
 176                 case NETR_DELTA_ALIAS_MEMBER:
 177                         e->object_rid = o->object_identifier.rid;
 178                         break;
 179                 case NETR_DELTA_SECRET:
 180                         e->object.object_name = o->object_identifier.name;
 181                         e->flags = NETR_CHANGELOG_NAME_INCLUDED;
 182                         break;
 183                 case NETR_DELTA_TRUSTED_DOMAIN:
 184                 case NETR_DELTA_ACCOUNT:
 185                 case NETR_DELTA_POLICY:
 186                         e->object.object_sid = o->object_identifier.sid;
 187                         e->flags = NETR_CHANGELOG_SID_INCLUDED;
 188                         break;
 189                 default:
 190                         break;
 191         }
 192 }
 193
 194 /**
 195  * libnet_samsync_delta
 196  */
 197
 198 static NTSTATUS libnet_samsync_delta(TALLOC_CTX *mem_ctx,
 199                                      enum netr_SamDatabaseID database_id,
 200                                      uint64_t *sequence_num,
 201                                      struct samsync_context *ctx,
 202                                      struct netr_ChangeLogEntry *e)
 203 {
 204         NTSTATUS result, status;
 205         NTSTATUS callback_status;
 206         const char *logon_server = ctx->cli->desthost;
 207         const char *computername = global_myname();
 208         struct netr_Authenticator credential;
 209         struct netr_Authenticator return_authenticator;
 210         uint16_t restart_state = 0;
 211         uint32_t sync_context = 0;
 212         struct dcerpc_binding_handle *b = ctx->cli->binding_handle;
 213
 214         ZERO_STRUCT(return_authenticator);
 215
 216         do {
 217                 struct netr_DELTA_ENUM_ARRAY *delta_enum_array = NULL;
 218
 219                 netlogon_creds_client_authenticator(ctx->cli->dc, &credential);
 220
 221                 if (ctx->single_object_replication &&
 222                     !ctx->force_full_replication) {
 223                         status = dcerpc_netr_DatabaseRedo(b, mem_ctx,
 224                                                           logon_server,
 225                                                           computername,
 226                                                           &credential,
 227                                                           &return_authenticator,
 228                                                           *e,
 229                                                           0,
 230                                                           &delta_enum_array,
 231                                                           &result);
 232                 } else if (!ctx->force_full_replication &&
 233                            sequence_num && (*sequence_num > 0)) {
 234                         status = dcerpc_netr_DatabaseDeltas(b, mem_ctx,
 235                                                             logon_server,
 236                                                             computername,
 237                                                             &credential,
 238                                                             &return_authenticator,
 239                                                             database_id,
 240                                                             sequence_num,
 241                                                             &delta_enum_array,
 242                                                             0xffff,
 243                                                             &result);
 244                 } else {
 245                         status = dcerpc_netr_DatabaseSync2(b, mem_ctx,
 246                                                            logon_server,
 247                                                            computername,
 248                                                            &credential,
 249                                                            &return_authenticator,
 250                                                            database_id,
 251                                                            restart_state,
 252                                                            &sync_context,
 253                                                            &delta_enum_array,
 254                                                            0xffff,
 255                                                            &result);
 256                 }
 257
 258                 if (!NT_STATUS_IS_OK(status)) {
 259                         return status;
 260                 }
 261
 262                 /* Check returned credentials. */
 263                 if (!netlogon_creds_client_check(ctx->cli->dc,
 264                                                  &return_authenticator.cred)) {
 265                         DEBUG(0,("credentials chain check failed\n"));
 266                         return NT_STATUS_ACCESS_DENIED;
 267                 }
 268
 269                 if (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) {
 270                         return result;
 271                 }
 272
 273                 if (NT_STATUS_IS_ERR(result)) {
 274                         break;
 275                 }
 276
 277                 samsync_fix_delta_array(mem_ctx,
 278                                         ctx->cli->dc,
 279                                         database_id,
 280                                         delta_enum_array);
 281
 282                 /* Process results */
 283                 callback_status = ctx->ops->process_objects(mem_ctx, database_id,
 284                                                             delta_enum_array,
 285                                                             sequence_num,
 286                                                             ctx);
 287                 if (!NT_STATUS_IS_OK(callback_status)) {
 288                         result = callback_status;
 289                         goto out;
 290                 }
 291
 292                 TALLOC_FREE(delta_enum_array);
 293
 294         } while (NT_STATUS_EQUAL(result, STATUS_MORE_ENTRIES));
 295
 296  out:
 297
 298         return result;
 299 }
 300
 301 /**
 302  * libnet_samsync
 303  */
 304
 305 NTSTATUS libnet_samsync(enum netr_SamDatabaseID database_id,
 306                         struct samsync_context *ctx)
 307 {
 308         NTSTATUS status = NT_STATUS_OK;
 309         NTSTATUS callback_status;
 310         TALLOC_CTX *mem_ctx;
 311         const char *debug_str;
 312         uint64_t sequence_num = 0;
 313         int i = 0;
 314
 315         if (!(mem_ctx = talloc_new(ctx))) {
 316                 return NT_STATUS_NO_MEMORY;
 317         }
 318
 319         if (!ctx->ops) {
 320                 return NT_STATUS_INVALID_PARAMETER;
 321         }
 322
 323         if (ctx->ops->startup) {
 324                 status = ctx->ops->startup(mem_ctx, ctx,
 325                                            database_id, &sequence_num);
 326                 if (!NT_STATUS_IS_OK(status)) {
 327                         goto done;
 328                 }
 329         }
 330
 331         debug_str = samsync_debug_str(mem_ctx, ctx->mode, database_id);
 332         if (debug_str) {
 333                 d_fprintf(stderr, "%s\n", debug_str);
 334         }
 335
 336         if (!ctx->single_object_replication) {
 337                 status = libnet_samsync_delta(mem_ctx, database_id,
 338                                               &sequence_num, ctx, NULL);
 339                 goto done;
 340         }
 341
 342         for (i=0; i<ctx->num_objects; i++) {
 343
 344                 struct netr_ChangeLogEntry e;
 345
 346                 if (ctx->objects[i].database_id != database_id) {
 347                         continue;
 348                 }
 349
 350                 libnet_init_netr_ChangeLogEntry(&ctx->objects[i], &e);
 351
 352                 status = libnet_samsync_delta(mem_ctx, database_id,
 353                                               &sequence_num, ctx, &e);
 354                 if (!NT_STATUS_IS_OK(status)) {
 355                         goto done;
 356                 }
 357         }
 358
 359  done:
 360
 361         if (NT_STATUS_IS_OK(status) && ctx->ops->finish) {
 362                 callback_status = ctx->ops->finish(mem_ctx, ctx,
 363                                                    database_id, sequence_num);
 364                 if (!NT_STATUS_IS_OK(callback_status)) {
 365                         status = callback_status;
 366                 }
 367         }
 368
 369         if (NT_STATUS_IS_ERR(status) && !ctx->error_message) {
 370
 371                 ctx->error_message = talloc_asprintf(ctx,
 372                         "Failed to fetch %s database: %s",
 373                         samsync_database_str(database_id),
 374                         nt_errstr(status));
 375
 376                 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
 377
 378                         ctx->error_message =
 379                                 talloc_asprintf_append(ctx->error_message,
 380                                         "\nPerhaps %s is a Windows native mode domain?",
 381                                         ctx->domain_name);
 382                 }
 383         }
 384
 385         talloc_destroy(mem_ctx);
 386
 387         return status;
 388 }
 389
 390 /**
 391  * pull_netr_AcctLockStr
 392  */
 393
 394 NTSTATUS pull_netr_AcctLockStr(TALLOC_CTX *mem_ctx,
 395                                struct lsa_BinaryString *r,
 396                                struct netr_AcctLockStr **str_p)
 397 {
 398         struct netr_AcctLockStr *str;
 399         enum ndr_err_code ndr_err;
 400         DATA_BLOB blob;
 401
 402         if (!mem_ctx || !r || !str_p) {
 403                 return NT_STATUS_INVALID_PARAMETER;
 404         }
 405
 406         *str_p = NULL;
 407
 408         str = TALLOC_ZERO_P(mem_ctx, struct netr_AcctLockStr);
 409         if (!str) {
 410                 return NT_STATUS_NO_MEMORY;
 411         }
 412
 413         blob = data_blob_const(r->array, r->length);
 414
 415         ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, str,
 416                        (ndr_pull_flags_fn_t)ndr_pull_netr_AcctLockStr);
 417
 418         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 419                 return ndr_map_error2ntstatus(ndr_err);
 420         }
 421
 422         *str_p = str;
 423
 424         return NT_STATUS_OK;
 425 }
 426