2 Unix SMB/CIFS implementation.
3 Copyright (C) Andrew Tridgell 1992-2001
4 Copyright (C) Andrew Bartlett 2002
5 Copyright (C) Rafal Szczesniak 2002
6 Copyright (C) Tim Potter 2001
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 /* the Samba secrets database stores any generated, private information
23 such as the local SID and machine trust password */
26 #include "system/filesys.h"
27 #include "../libcli/auth/libcli_auth.h"
28 #include "librpc/gen_ndr/ndr_secrets.h"
31 #include "../libcli/security/security.h"
34 #define DBGC_CLASS DBGC_PASSDB
36 static struct db_context *db_ctx;
39 * Use a TDB to store an incrementing random seed.
41 * Initialised to the current pid, the very first time Samba starts,
42 * and incremented by one each time it is needed.
44 * @note Not called by systems with a working /dev/urandom.
46 static void get_rand_seed(void *userdata, int *new_seed)
48 *new_seed = sys_getpid();
50 dbwrap_trans_change_int32_atomic(db_ctx, "INFO/random_seed",
55 /* open up the secrets database */
56 bool secrets_init(void)
64 fname = talloc_asprintf(talloc_tos(), "%s/secrets.tdb",
70 db_ctx = db_open(NULL, fname, 0,
71 TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
74 DEBUG(0,("Failed to open %s\n", fname));
82 * Set a reseed function for the crypto random generator
84 * This avoids a problem where systems without /dev/urandom
85 * could send the same challenge to multiple clients
87 set_rand_reseed_callback(get_rand_seed, NULL);
89 /* Ensure that the reseed is done now, while we are root, etc */
90 generate_random_buffer(&dummy, sizeof(dummy));
95 struct db_context *secrets_db_ctx(void)
97 if (!secrets_init()) {
107 void secrets_shutdown(void)
112 /* read a entry from the secrets database - the caller must free the result
113 if size is non-null then the size of the entry is put in there
115 void *secrets_fetch(const char *key, size_t *size)
120 if (!secrets_init()) {
124 if (db_ctx->fetch(db_ctx, talloc_tos(), string_tdb_data(key),
129 result = memdup(dbuf.dptr, dbuf.dsize);
130 if (result == NULL) {
133 TALLOC_FREE(dbuf.dptr);
142 /* store a secrets entry
144 bool secrets_store(const char *key, const void *data, size_t size)
148 if (!secrets_init()) {
152 status = dbwrap_trans_store(db_ctx, string_tdb_data(key),
153 make_tdb_data((const uint8 *)data, size),
155 return NT_STATUS_IS_OK(status);
159 /* delete a secets database entry
161 bool secrets_delete(const char *key)
164 if (!secrets_init()) {
168 status = dbwrap_trans_delete(db_ctx, string_tdb_data(key));
170 return NT_STATUS_IS_OK(status);
174 * Form a key for fetching a trusted domain password
176 * @param domain trusted domain name
178 * @return stored password's key
180 static char *trustdom_keystr(const char *domain)
184 keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
185 SECRETS_DOMTRUST_ACCT_PASS,
187 SMB_ASSERT(keystr != NULL);
191 /************************************************************************
192 Routine to get account password to trusted domain
193 ************************************************************************/
195 bool secrets_fetch_trusted_domain_password(const char *domain, char** pwd,
196 struct dom_sid *sid, time_t *pass_last_set_time)
198 struct TRUSTED_DOM_PASS pass;
199 enum ndr_err_code ndr_err;
201 /* unpacking structures */
204 /* fetching trusted domain password structure */
205 if (!(blob.data = (uint8_t *)secrets_fetch(trustdom_keystr(domain),
207 DEBUG(5, ("secrets_fetch failed!\n"));
211 /* unpack trusted domain password */
212 ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
213 (ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
215 SAFE_FREE(blob.data);
217 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
222 /* the trust's password */
224 *pwd = SMB_STRDUP(pass.pass);
230 /* last change time */
231 if (pass_last_set_time) *pass_last_set_time = pass.mod_time;
234 if (sid != NULL) sid_copy(sid, &pass.domain_sid);
240 * Routine to store the password for trusted domain
242 * @param domain remote domain name
243 * @param pwd plain text password of trust relationship
244 * @param sid remote domain sid
246 * @return true if succeeded
249 bool secrets_store_trusted_domain_password(const char* domain, const char* pwd,
250 const struct dom_sid *sid)
254 /* packing structures */
256 enum ndr_err_code ndr_err;
257 struct TRUSTED_DOM_PASS pass;
260 pass.uni_name = domain;
261 pass.uni_name_len = strlen(domain)+1;
263 /* last change time */
264 pass.mod_time = time(NULL);
266 /* password of the trust */
267 pass.pass_len = strlen(pwd);
271 sid_copy(&pass.domain_sid, sid);
273 ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), &pass,
274 (ndr_push_flags_fn_t)ndr_push_TRUSTED_DOM_PASS);
275 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
279 ret = secrets_store(trustdom_keystr(domain), blob.data, blob.length);
281 data_blob_free(&blob);
286 /************************************************************************
287 Routine to delete the password for trusted domain
288 ************************************************************************/
290 bool trusted_domain_password_delete(const char *domain)
292 return secrets_delete(trustdom_keystr(domain));
295 bool secrets_store_ldap_pw(const char* dn, char* pw)
300 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, dn) < 0) {
301 DEBUG(0, ("secrets_store_ldap_pw: asprintf failed!\n"));
305 ret = secrets_store(key, pw, strlen(pw)+1);
311 /*******************************************************************
312 Find the ldap password.
313 ******************************************************************/
315 bool fetch_ldap_pw(char **dn, char** pw)
320 *dn = smb_xstrdup(lp_ldap_admin_dn());
322 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
324 DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
328 *pw=(char *)secrets_fetch(key, &size);
332 /* Upgrade 2.2 style entry */
334 char* old_style_key = SMB_STRDUP(*dn);
336 fstring old_style_pw;
338 if (!old_style_key) {
339 DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
343 for (p=old_style_key; *p; p++)
344 if (*p == ',') *p = '/';
346 data=(char *)secrets_fetch(old_style_key, &size);
347 if ((data == NULL) || (size < sizeof(old_style_pw))) {
348 DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
349 SAFE_FREE(old_style_key);
355 size = MIN(size, sizeof(fstring)-1);
356 strncpy(old_style_pw, data, size);
357 old_style_pw[size] = 0;
361 if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
362 DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
363 SAFE_FREE(old_style_key);
367 if (!secrets_delete(old_style_key)) {
368 DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
371 SAFE_FREE(old_style_key);
373 *pw = smb_xstrdup(old_style_pw);
380 * Get trusted domains info from secrets.tdb.
383 struct list_trusted_domains_state {
385 struct trustdom_info **domains;
388 static int list_trusted_domain(struct db_record *rec, void *private_data)
390 const size_t prefix_len = strlen(SECRETS_DOMTRUST_ACCT_PASS);
391 struct TRUSTED_DOM_PASS pass;
392 enum ndr_err_code ndr_err;
394 struct trustdom_info *dom_info;
396 struct list_trusted_domains_state *state =
397 (struct list_trusted_domains_state *)private_data;
399 if ((rec->key.dsize < prefix_len)
400 || (strncmp((char *)rec->key.dptr, SECRETS_DOMTRUST_ACCT_PASS,
405 blob = data_blob_const(rec->value.dptr, rec->value.dsize);
407 ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
408 (ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
409 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
413 if (pass.domain_sid.num_auths != 4) {
414 DEBUG(0, ("SID %s is not a domain sid, has %d "
415 "auths instead of 4\n",
416 sid_string_dbg(&pass.domain_sid),
417 pass.domain_sid.num_auths));
421 if (!(dom_info = TALLOC_P(state->domains, struct trustdom_info))) {
422 DEBUG(0, ("talloc failed\n"));
426 dom_info->name = talloc_strdup(dom_info, pass.uni_name);
427 if (!dom_info->name) {
428 TALLOC_FREE(dom_info);
432 sid_copy(&dom_info->sid, &pass.domain_sid);
434 ADD_TO_ARRAY(state->domains, struct trustdom_info *, dom_info,
435 &state->domains, &state->num_domains);
437 if (state->domains == NULL) {
438 state->num_domains = 0;
444 NTSTATUS secrets_trusted_domains(TALLOC_CTX *mem_ctx, uint32 *num_domains,
445 struct trustdom_info ***domains)
447 struct list_trusted_domains_state state;
449 if (!secrets_init()) {
450 return NT_STATUS_ACCESS_DENIED;
453 state.num_domains = 0;
456 * Make sure that a talloc context for the trustdom_info structs
460 if (!(state.domains = TALLOC_ARRAY(
461 mem_ctx, struct trustdom_info *, 1))) {
462 return NT_STATUS_NO_MEMORY;
465 db_ctx->traverse_read(db_ctx, list_trusted_domain, (void *)&state);
467 *num_domains = state.num_domains;
468 *domains = state.domains;
472 /*******************************************************************************
473 Store a complete AFS keyfile into secrets.tdb.
474 *******************************************************************************/
476 bool secrets_store_afs_keyfile(const char *cell, const struct afs_keyfile *keyfile)
480 if ((cell == NULL) || (keyfile == NULL))
483 if (ntohl(keyfile->nkeys) > SECRETS_AFS_MAXKEYS)
486 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
487 return secrets_store(key, keyfile, sizeof(struct afs_keyfile));
490 /*******************************************************************************
491 Fetch the current (highest) AFS key from secrets.tdb
492 *******************************************************************************/
493 bool secrets_fetch_afs_key(const char *cell, struct afs_key *result)
496 struct afs_keyfile *keyfile;
500 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
502 keyfile = (struct afs_keyfile *)secrets_fetch(key, &size);
507 if (size != sizeof(struct afs_keyfile)) {
512 i = ntohl(keyfile->nkeys);
514 if (i > SECRETS_AFS_MAXKEYS) {
519 *result = keyfile->entry[i-1];
521 result->kvno = ntohl(result->kvno);
528 /******************************************************************************
529 When kerberos is not available, choose between anonymous or
530 authenticated connections.
532 We need to use an authenticated connection if DCs have the
533 RestrictAnonymous registry entry set > 0, or the "Additional
534 restrictions for anonymous connections" set in the win2k Local
537 Caller to free() result in domain, username, password
538 *******************************************************************************/
539 void secrets_fetch_ipc_userpass(char **username, char **domain, char **password)
541 *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
542 *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
543 *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
545 if (*username && **username) {
547 if (!*domain || !**domain)
548 *domain = smb_xstrdup(lp_workgroup());
550 if (!*password || !**password)
551 *password = smb_xstrdup("");
553 DEBUG(3, ("IPC$ connections done by user %s\\%s\n",
554 *domain, *username));
557 DEBUG(3, ("IPC$ connections done anonymously\n"));
558 *username = smb_xstrdup("");
559 *domain = smb_xstrdup("");
560 *password = smb_xstrdup("");
564 bool secrets_store_generic(const char *owner, const char *key, const char *secret)
569 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
570 DEBUG(0, ("asprintf failed!\n"));
574 ret = secrets_store(tdbkey, secret, strlen(secret)+1);
580 bool secrets_delete_generic(const char *owner, const char *key)
585 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
586 DEBUG(0, ("asprintf failed!\n"));
590 ret = secrets_delete(tdbkey);
596 /*******************************************************************
597 Find the ldap password.
598 ******************************************************************/
600 char *secrets_fetch_generic(const char *owner, const char *key)
605 if (( ! owner) || ( ! key)) {
606 DEBUG(1, ("Invalid Parameters"));
610 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
611 DEBUG(0, ("Out of memory!\n"));
615 secret = (char *)secrets_fetch(tdbkey, NULL);