2 Unix SMB/CIFS implementation.
3 Copyright (C) Andrew Tridgell 1992-2001
4 Copyright (C) Andrew Bartlett 2002
5 Copyright (C) Rafal Szczesniak 2002
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 /* the Samba secrets database stores any generated, private information
22 such as the local SID and machine trust password */
26 #include "param/param.h"
27 #include "system/filesys.h"
29 #include "lib/ldb/include/ldb.h"
30 #include "lib/tdb/include/tdb.h"
31 #include "lib/util/util_tdb.h"
32 #include "lib/util/util_ldb.h"
33 #include "librpc/gen_ndr/ndr_security.h"
36 * Use a TDB to store an incrementing random seed.
38 * Initialised to the current pid, the very first time Samba starts,
39 * and incremented by one each time it is needed.
41 * @note Not called by systems with a working /dev/urandom.
43 static void get_rand_seed(struct tdb_wrap *secretsdb, int *new_seed)
46 if (secretsdb != NULL) {
47 tdb_change_int32_atomic(secretsdb->tdb, "INFO/random_seed", new_seed, 1);
52 * open up the secrets database
54 struct tdb_wrap *secrets_init(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
60 fname = private_path(mem_ctx, lp_ctx, "secrets.tdb");
62 tdb = tdb_wrap_open(mem_ctx, fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
65 DEBUG(0,("Failed to open %s\n", fname));
72 * Set a reseed function for the crypto random generator
74 * This avoids a problem where systems without /dev/urandom
75 * could send the same challenge to multiple clients
77 set_rand_reseed_callback((void (*) (void *, int *))get_rand_seed, tdb);
79 /* Ensure that the reseed is done now, while we are root, etc */
80 generate_random_buffer(&dummy, sizeof(dummy));
86 connect to the secrets ldb
88 struct ldb_context *secrets_db_connect(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
92 struct ldb_context *ldb;
94 url = lp_secrets_url(lp_ctx);
95 if (!url || !url[0]) {
99 path = private_path(mem_ctx, lp_ctx, url);
104 /* Secrets.ldb *must* always be local. If we call for a
105 * system_session() we will recurse */
106 ldb = ldb_init(mem_ctx);
112 ldb_set_modules_dir(ldb,
113 talloc_asprintf(ldb, "%s/ldb", lp_modulesdir(lp_ctx)));
115 if (ldb_connect(ldb, path, 0, NULL) != 0) {
126 * Retrieve the domain SID from the secrets database.
127 * @return pointer to a SID object if the SID could be obtained, NULL otherwise
129 struct dom_sid *secrets_get_domain_sid(TALLOC_CTX *mem_ctx,
130 struct loadparm_context *lp_ctx,
133 struct ldb_context *ldb;
134 struct ldb_message **msgs;
136 const char *attrs[] = { "objectSid", NULL };
137 struct dom_sid *result = NULL;
138 const struct ldb_val *v;
139 enum ndr_err_code ndr_err;
141 ldb = secrets_db_connect(mem_ctx, lp_ctx);
143 DEBUG(5, ("secrets_db_connect failed\n"));
147 ldb_ret = gendb_search(ldb, ldb,
148 ldb_dn_new(mem_ctx, ldb, SECRETS_PRIMARY_DOMAIN_DN),
150 SECRETS_PRIMARY_DOMAIN_FILTER, domain);
153 DEBUG(5, ("Error searching for domain SID for %s: %s",
154 domain, ldb_errstring(ldb)));
160 DEBUG(5, ("Did not find domain record for %s\n", domain));
166 DEBUG(5, ("Found more than one (%d) domain records for %s\n",
172 v = ldb_msg_find_ldb_val(msgs[0], "objectSid");
174 DEBUG(0, ("Domain object for %s does not contain a SID!\n",
178 result = talloc(mem_ctx, struct dom_sid);
179 if (result == NULL) {
184 ndr_err = ndr_pull_struct_blob(v, result, NULL, result,
185 (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
186 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {