diff options
Diffstat (limited to 'source3/libnet/libnet_samsync.c')
| -rw-r--r-- | source3/libnet/libnet_samsync.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/source3/libnet/libnet_samsync.c b/source3/libnet/libnet_samsync.c new file mode 100644 index 0000000000..daf27ffb51 --- /dev/null +++ b/source3/libnet/libnet_samsync.c @@ -0,0 +1,411 @@ +/* + Unix SMB/CIFS implementation. + + Extract the user/system database from a remote SamSync server + + Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005 + Copyright (C) Guenther Deschner <gd@samba.org> 2008 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + + +#include "includes.h" +#include "libnet/libnet.h" + +/** + * Decrypt and extract the user's passwords. + * + * The writes decrypted (no longer 'RID encrypted' or arcfour encrypted) + * passwords back into the structure + */ + +static NTSTATUS fix_user(TALLOC_CTX *mem_ctx, + DATA_BLOB *session_key, + bool rid_crypt, + enum netr_SamDatabaseID database_id, + struct netr_DELTA_ENUM *delta) +{ + + uint32_t rid = delta->delta_id_union.rid; + struct netr_DELTA_USER *user = delta->delta_union.user; + struct samr_Password lm_hash; + struct samr_Password nt_hash; + + if (rid_crypt) { + if (user->lm_password_present) { + sam_pwd_hash(rid, user->lmpassword.hash, lm_hash.hash, 0); + user->lmpassword = lm_hash; + } + + if (user->nt_password_present) { + sam_pwd_hash(rid, user->ntpassword.hash, nt_hash.hash, 0); + user->ntpassword = nt_hash; + } + } + + if (user->user_private_info.SensitiveData) { + DATA_BLOB data; + struct netr_USER_KEYS keys; + enum ndr_err_code ndr_err; + data.data = user->user_private_info.SensitiveData; + data.length = user->user_private_info.DataLength; + SamOEMhashBlob(data.data, data.length, session_key); + user->user_private_info.SensitiveData = data.data; + user->user_private_info.DataLength = data.length; + + ndr_err = ndr_pull_struct_blob(&data, mem_ctx, &keys, + (ndr_pull_flags_fn_t)ndr_pull_netr_USER_KEYS); + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + dump_data(10, data.data, data.length); + return ndr_map_error2ntstatus(ndr_err); + } + + if (keys.keys.keys2.lmpassword.length == 16) { + if (rid_crypt) { + sam_pwd_hash(rid, + keys.keys.keys2.lmpassword.pwd.hash, + lm_hash.hash, 0); + user->lmpassword = lm_hash; + } else { + user->lmpassword = keys.keys.keys2.lmpassword.pwd; + } + user->lm_password_present = true; + } + if (keys.keys.keys2.ntpassword.length == 16) { + if (rid_crypt) { + sam_pwd_hash(rid, + keys.keys.keys2.ntpassword.pwd.hash, + nt_hash.hash, 0); + user->ntpassword = nt_hash; + } else { + user->ntpassword = keys.keys.keys2.ntpassword.pwd; + } + user->nt_password_present = true; + } + /* TODO: rid decrypt history fields */ + } + return NT_STATUS_OK; +} + +/** + * Decrypt and extract the secrets + * + * The writes decrypted secrets back into the structure + */ +static NTSTATUS fix_secret(TALLOC_CTX *mem_ctx, + DATA_BLOB *session_key, + enum netr_SamDatabaseID database_id, + struct netr_DELTA_ENUM *delta) +{ + struct netr_DELTA_SECRET *secret = delta->delta_union.secret; + + SamOEMhashBlob(secret->current_cipher.cipher_data, + secret->current_cipher.maxlen, + session_key); + + SamOEMhashBlob(secret->old_cipher.cipher_data, + secret->old_cipher.maxlen, + session_key); + + return NT_STATUS_OK; +} + +/** + * Fix up the delta, dealing with encryption issues so that the final + * callback need only do the printing or application logic + */ + +static NTSTATUS samsync_fix_delta(TALLOC_CTX *mem_ctx, + DATA_BLOB *session_key, + bool rid_crypt, + enum netr_SamDatabaseID database_id, + struct netr_DELTA_ENUM *delta) +{ + NTSTATUS status = NT_STATUS_OK; + + switch (delta->delta_type) { + case NETR_DELTA_USER: + + status = fix_user(mem_ctx, + session_key, + rid_crypt, + database_id, + delta); + break; + case NETR_DELTA_SECRET: + + status = fix_secret(mem_ctx, + session_key, + database_id, + delta); + break; + default: + break; + } + + return status; +} + +/** + * Fix up the delta, dealing with encryption issues so that the final + * callback need only do the printing or application logic + */ + +static NTSTATUS samsync_fix_delta_array(TALLOC_CTX *mem_ctx, + DATA_BLOB *session_key, + bool rid_crypt, + enum netr_SamDatabaseID database_id, + struct netr_DELTA_ENUM_ARRAY *r) +{ + NTSTATUS status; + int i; + + for (i = 0; i < r->num_deltas; i++) { + + status = samsync_fix_delta(mem_ctx, + session_key, + rid_crypt, + database_id, + &r->delta_enum[i]); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + } + + return NT_STATUS_OK; +} + +/** + * libnet_samsync_init_context + */ + +NTSTATUS libnet_samsync_init_context(TALLOC_CTX *mem_ctx, + const struct dom_sid *domain_sid, + struct samsync_context **ctx_p) +{ + struct samsync_context *ctx; + + *ctx_p = NULL; + + ctx = TALLOC_ZERO_P(mem_ctx, struct samsync_context); + NT_STATUS_HAVE_NO_MEMORY(ctx); + + if (domain_sid) { + ctx->domain_sid = sid_dup_talloc(mem_ctx, domain_sid); + NT_STATUS_HAVE_NO_MEMORY(ctx->domain_sid); + + ctx->domain_sid_str = sid_string_talloc(mem_ctx, ctx->domain_sid); + NT_STATUS_HAVE_NO_MEMORY(ctx->domain_sid_str); + } + + *ctx_p = ctx; + + return NT_STATUS_OK; +} + +/** + * samsync_database_str + */ + +static const char *samsync_database_str(enum netr_SamDatabaseID database_id) +{ + + switch (database_id) { + case SAM_DATABASE_DOMAIN: + return "DOMAIN"; + case SAM_DATABASE_BUILTIN: + return "BUILTIN"; + case SAM_DATABASE_PRIVS: + return "PRIVS"; + default: + return "unknown"; + } +} + +/** + * samsync_debug_str + */ + +static const char *samsync_debug_str(TALLOC_CTX *mem_ctx, + enum net_samsync_mode mode, + enum netr_SamDatabaseID database_id) +{ + const char *action = NULL; + + switch (mode) { + case NET_SAMSYNC_MODE_DUMP: + action = "Dumping (to stdout)"; + break; + case NET_SAMSYNC_MODE_FETCH_PASSDB: + action = "Fetching (to passdb)"; + break; + case NET_SAMSYNC_MODE_FETCH_LDIF: + action = "Fetching (to ldif)"; + break; + case NET_SAMSYNC_MODE_FETCH_KEYTAB: + action = "Fetching (to keytab)"; + break; + default: + action = "Unknown"; + break; + } + + return talloc_asprintf(mem_ctx, "%s %s database", + action, samsync_database_str(database_id)); +} + +/** + * libnet_samsync + */ + +NTSTATUS libnet_samsync(enum netr_SamDatabaseID database_id, + struct samsync_context *ctx) +{ + NTSTATUS result; + TALLOC_CTX *mem_ctx; + const char *logon_server = ctx->cli->desthost; + const char *computername = global_myname(); + struct netr_Authenticator credential; + struct netr_Authenticator return_authenticator; + uint16_t restart_state = 0; + uint32_t sync_context = 0; + const char *debug_str; + DATA_BLOB session_key; + + ZERO_STRUCT(return_authenticator); + + if (!(mem_ctx = talloc_init("libnet_samsync"))) { + return NT_STATUS_NO_MEMORY; + } + + debug_str = samsync_debug_str(mem_ctx, ctx->mode, database_id); + if (debug_str) { + d_fprintf(stderr, "%s\n", debug_str); + } + + do { + struct netr_DELTA_ENUM_ARRAY *delta_enum_array = NULL; + NTSTATUS callback_status; + + netlogon_creds_client_step(ctx->cli->dc, &credential); + + result = rpccli_netr_DatabaseSync2(ctx->cli, mem_ctx, + logon_server, + computername, + &credential, + &return_authenticator, + database_id, + restart_state, + &sync_context, + &delta_enum_array, + 0xffff); + if (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) { + return result; + } + + /* Check returned credentials. */ + if (!netlogon_creds_client_check(ctx->cli->dc, + &return_authenticator.cred)) { + DEBUG(0,("credentials chain check failed\n")); + return NT_STATUS_ACCESS_DENIED; + } + + if (NT_STATUS_IS_ERR(result)) { + break; + } + + session_key = data_blob_const(ctx->cli->dc->sess_key, 16); + + samsync_fix_delta_array(mem_ctx, + &session_key, + false, + database_id, + delta_enum_array); + + /* Process results */ + callback_status = ctx->delta_fn(mem_ctx, database_id, + delta_enum_array, + NT_STATUS_IS_OK(result), ctx); + if (!NT_STATUS_IS_OK(callback_status)) { + result = callback_status; + goto out; + } + + TALLOC_FREE(delta_enum_array); + + /* Increment sync_context */ + sync_context += 1; + + } while (NT_STATUS_EQUAL(result, STATUS_MORE_ENTRIES)); + + out: + if (NT_STATUS_IS_ERR(result) && !ctx->error_message) { + + ctx->error_message = talloc_asprintf(ctx, + "Failed to fetch %s database: %s", + samsync_database_str(database_id), + nt_errstr(result)); + + if (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) { + + ctx->error_message = + talloc_asprintf_append(ctx->error_message, + "\nPerhaps %s is a Windows native mode domain?", + ctx->domain_name); + } + } + + talloc_destroy(mem_ctx); + + return result; +} + +/** + * pull_netr_AcctLockStr + */ + +NTSTATUS pull_netr_AcctLockStr(TALLOC_CTX *mem_ctx, + struct lsa_BinaryString *r, + struct netr_AcctLockStr **str_p) +{ + struct netr_AcctLockStr *str; + enum ndr_err_code ndr_err; + DATA_BLOB blob; + + if (!mem_ctx || !r || !str_p) { + return NT_STATUS_INVALID_PARAMETER; + } + + *str_p = NULL; + + str = TALLOC_ZERO_P(mem_ctx, struct netr_AcctLockStr); + if (!str) { + return NT_STATUS_NO_MEMORY; + } + + blob = data_blob_const(r->array, r->length); + + ndr_err = ndr_pull_struct_blob(&blob, mem_ctx, str, + (ndr_pull_flags_fn_t)ndr_pull_netr_AcctLockStr); + + if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) { + return ndr_map_error2ntstatus(ndr_err); + } + + *str_p = str; + + return NT_STATUS_OK; +} + |