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 "../libcli/auth/libcli_auth.h"
27 #include "librpc/gen_ndr/ndr_secrets.h"
30 #define DBGC_CLASS DBGC_PASSDB
32 static struct db_context *db_ctx;
35 * Use a TDB to store an incrementing random seed.
37 * Initialised to the current pid, the very first time Samba starts,
38 * and incremented by one each time it is needed.
40 * @note Not called by systems with a working /dev/urandom.
42 static void get_rand_seed(void *userdata, int *new_seed)
44 *new_seed = sys_getpid();
46 dbwrap_trans_change_int32_atomic(db_ctx, "INFO/random_seed",
51 /* open up the secrets database */
52 bool secrets_init(void)
60 fname = talloc_asprintf(talloc_tos(), "%s/secrets.tdb",
66 db_ctx = db_open(NULL, fname, 0,
67 TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
70 DEBUG(0,("Failed to open %s\n", fname));
78 * Set a reseed function for the crypto random generator
80 * This avoids a problem where systems without /dev/urandom
81 * could send the same challenge to multiple clients
83 set_rand_reseed_callback(get_rand_seed, NULL);
85 /* Ensure that the reseed is done now, while we are root, etc */
86 generate_random_buffer(&dummy, sizeof(dummy));
91 struct db_context *secrets_db_ctx(void)
93 if (!secrets_init()) {
103 void secrets_shutdown(void)
108 /* read a entry from the secrets database - the caller must free the result
109 if size is non-null then the size of the entry is put in there
111 void *secrets_fetch(const char *key, size_t *size)
116 if (!secrets_init()) {
120 if (db_ctx->fetch(db_ctx, talloc_tos(), string_tdb_data(key),
125 result = memdup(dbuf.dptr, dbuf.dsize);
126 if (result == NULL) {
129 TALLOC_FREE(dbuf.dptr);
138 /* store a secrets entry
140 bool secrets_store(const char *key, const void *data, size_t size)
144 if (!secrets_init()) {
148 status = dbwrap_trans_store(db_ctx, string_tdb_data(key),
149 make_tdb_data((const uint8 *)data, size),
151 return NT_STATUS_IS_OK(status);
155 /* delete a secets database entry
157 bool secrets_delete(const char *key)
160 if (!secrets_init()) {
164 status = dbwrap_trans_delete(db_ctx, string_tdb_data(key));
166 return NT_STATUS_IS_OK(status);
169 bool secrets_store_local_schannel_key(uint8_t schannel_key[16])
171 return secrets_store(SECRETS_LOCAL_SCHANNEL_KEY, schannel_key, 16);
174 bool secrets_fetch_local_schannel_key(uint8_t schannel_key[16])
179 key = (uint8_t *)secrets_fetch(SECRETS_LOCAL_SCHANNEL_KEY, &size);
189 memcpy(schannel_key, key, 16);
195 * Form a key for fetching a trusted domain password
197 * @param domain trusted domain name
199 * @return stored password's key
201 static char *trustdom_keystr(const char *domain)
205 keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
206 SECRETS_DOMTRUST_ACCT_PASS,
208 SMB_ASSERT(keystr != NULL);
212 /************************************************************************
213 Routine to get account password to trusted domain
214 ************************************************************************/
216 bool secrets_fetch_trusted_domain_password(const char *domain, char** pwd,
217 struct dom_sid *sid, time_t *pass_last_set_time)
219 struct TRUSTED_DOM_PASS pass;
220 enum ndr_err_code ndr_err;
222 /* unpacking structures */
225 /* fetching trusted domain password structure */
226 if (!(blob.data = (uint8_t *)secrets_fetch(trustdom_keystr(domain),
228 DEBUG(5, ("secrets_fetch failed!\n"));
232 /* unpack trusted domain password */
233 ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
234 (ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
235 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
239 SAFE_FREE(blob.data);
241 /* the trust's password */
243 *pwd = SMB_STRDUP(pass.pass);
249 /* last change time */
250 if (pass_last_set_time) *pass_last_set_time = pass.mod_time;
253 if (sid != NULL) sid_copy(sid, &pass.domain_sid);
259 * Routine to store the password for trusted domain
261 * @param domain remote domain name
262 * @param pwd plain text password of trust relationship
263 * @param sid remote domain sid
265 * @return true if succeeded
268 bool secrets_store_trusted_domain_password(const char* domain, const char* pwd,
269 const struct dom_sid *sid)
273 /* packing structures */
275 enum ndr_err_code ndr_err;
276 struct TRUSTED_DOM_PASS pass;
279 pass.uni_name = domain;
280 pass.uni_name_len = strlen(domain)+1;
282 /* last change time */
283 pass.mod_time = time(NULL);
285 /* password of the trust */
286 pass.pass_len = strlen(pwd);
290 sid_copy(&pass.domain_sid, sid);
292 ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), &pass,
293 (ndr_push_flags_fn_t)ndr_push_TRUSTED_DOM_PASS);
294 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
298 ret = secrets_store(trustdom_keystr(domain), blob.data, blob.length);
300 data_blob_free(&blob);
305 /************************************************************************
306 Routine to delete the password for trusted domain
307 ************************************************************************/
309 bool trusted_domain_password_delete(const char *domain)
311 return secrets_delete(trustdom_keystr(domain));
314 bool secrets_store_ldap_pw(const char* dn, char* pw)
319 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, dn) < 0) {
320 DEBUG(0, ("secrets_store_ldap_pw: asprintf failed!\n"));
324 ret = secrets_store(key, pw, strlen(pw)+1);
330 /*******************************************************************
331 Find the ldap password.
332 ******************************************************************/
334 bool fetch_ldap_pw(char **dn, char** pw)
339 *dn = smb_xstrdup(lp_ldap_admin_dn());
341 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
343 DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
347 *pw=(char *)secrets_fetch(key, &size);
351 /* Upgrade 2.2 style entry */
353 char* old_style_key = SMB_STRDUP(*dn);
355 fstring old_style_pw;
357 if (!old_style_key) {
358 DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
362 for (p=old_style_key; *p; p++)
363 if (*p == ',') *p = '/';
365 data=(char *)secrets_fetch(old_style_key, &size);
366 if ((data == NULL) || (size < sizeof(old_style_pw))) {
367 DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
368 SAFE_FREE(old_style_key);
374 size = MIN(size, sizeof(fstring)-1);
375 strncpy(old_style_pw, data, size);
376 old_style_pw[size] = 0;
380 if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
381 DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
382 SAFE_FREE(old_style_key);
386 if (!secrets_delete(old_style_key)) {
387 DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
390 SAFE_FREE(old_style_key);
392 *pw = smb_xstrdup(old_style_pw);
399 * Get trusted domains info from secrets.tdb.
402 struct list_trusted_domains_state {
404 struct trustdom_info **domains;
407 static int list_trusted_domain(struct db_record *rec, void *private_data)
409 const size_t prefix_len = strlen(SECRETS_DOMTRUST_ACCT_PASS);
410 struct TRUSTED_DOM_PASS pass;
411 enum ndr_err_code ndr_err;
413 struct trustdom_info *dom_info;
415 struct list_trusted_domains_state *state =
416 (struct list_trusted_domains_state *)private_data;
418 if ((rec->key.dsize < prefix_len)
419 || (strncmp((char *)rec->key.dptr, SECRETS_DOMTRUST_ACCT_PASS,
424 blob = data_blob_const(rec->value.dptr, rec->value.dsize);
426 ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
427 (ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
428 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
432 if (pass.domain_sid.num_auths != 4) {
433 DEBUG(0, ("SID %s is not a domain sid, has %d "
434 "auths instead of 4\n",
435 sid_string_dbg(&pass.domain_sid),
436 pass.domain_sid.num_auths));
440 if (!(dom_info = TALLOC_P(state->domains, struct trustdom_info))) {
441 DEBUG(0, ("talloc failed\n"));
445 dom_info->name = talloc_strdup(dom_info, pass.uni_name);
446 if (!dom_info->name) {
447 TALLOC_FREE(dom_info);
451 sid_copy(&dom_info->sid, &pass.domain_sid);
453 ADD_TO_ARRAY(state->domains, struct trustdom_info *, dom_info,
454 &state->domains, &state->num_domains);
456 if (state->domains == NULL) {
457 state->num_domains = 0;
463 NTSTATUS secrets_trusted_domains(TALLOC_CTX *mem_ctx, uint32 *num_domains,
464 struct trustdom_info ***domains)
466 struct list_trusted_domains_state state;
470 if (db_ctx == NULL) {
471 return NT_STATUS_ACCESS_DENIED;
474 state.num_domains = 0;
477 * Make sure that a talloc context for the trustdom_info structs
481 if (!(state.domains = TALLOC_ARRAY(
482 mem_ctx, struct trustdom_info *, 1))) {
483 return NT_STATUS_NO_MEMORY;
486 db_ctx->traverse_read(db_ctx, list_trusted_domain, (void *)&state);
488 *num_domains = state.num_domains;
489 *domains = state.domains;
493 /*******************************************************************************
494 Store a complete AFS keyfile into secrets.tdb.
495 *******************************************************************************/
497 bool secrets_store_afs_keyfile(const char *cell, const struct afs_keyfile *keyfile)
501 if ((cell == NULL) || (keyfile == NULL))
504 if (ntohl(keyfile->nkeys) > SECRETS_AFS_MAXKEYS)
507 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
508 return secrets_store(key, keyfile, sizeof(struct afs_keyfile));
511 /*******************************************************************************
512 Fetch the current (highest) AFS key from secrets.tdb
513 *******************************************************************************/
514 bool secrets_fetch_afs_key(const char *cell, struct afs_key *result)
517 struct afs_keyfile *keyfile;
521 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
523 keyfile = (struct afs_keyfile *)secrets_fetch(key, &size);
528 if (size != sizeof(struct afs_keyfile)) {
533 i = ntohl(keyfile->nkeys);
535 if (i > SECRETS_AFS_MAXKEYS) {
540 *result = keyfile->entry[i-1];
542 result->kvno = ntohl(result->kvno);
549 /******************************************************************************
550 When kerberos is not available, choose between anonymous or
551 authenticated connections.
553 We need to use an authenticated connection if DCs have the
554 RestrictAnonymous registry entry set > 0, or the "Additional
555 restrictions for anonymous connections" set in the win2k Local
558 Caller to free() result in domain, username, password
559 *******************************************************************************/
560 void secrets_fetch_ipc_userpass(char **username, char **domain, char **password)
562 *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
563 *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
564 *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
566 if (*username && **username) {
568 if (!*domain || !**domain)
569 *domain = smb_xstrdup(lp_workgroup());
571 if (!*password || !**password)
572 *password = smb_xstrdup("");
574 DEBUG(3, ("IPC$ connections done by user %s\\%s\n",
575 *domain, *username));
578 DEBUG(3, ("IPC$ connections done anonymously\n"));
579 *username = smb_xstrdup("");
580 *domain = smb_xstrdup("");
581 *password = smb_xstrdup("");
585 bool secrets_store_generic(const char *owner, const char *key, const char *secret)
590 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
591 DEBUG(0, ("asprintf failed!\n"));
595 ret = secrets_store(tdbkey, secret, strlen(secret)+1);
601 bool secrets_delete_generic(const char *owner, const char *key)
606 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
607 DEBUG(0, ("asprintf failed!\n"));
611 ret = secrets_delete(tdbkey);
617 /*******************************************************************
618 Find the ldap password.
619 ******************************************************************/
621 char *secrets_fetch_generic(const char *owner, const char *key)
626 if (( ! owner) || ( ! key)) {
627 DEBUG(1, ("Invalid Parameters"));
631 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
632 DEBUG(0, ("Out of memory!\n"));
636 secret = (char *)secrets_fetch(tdbkey, NULL);