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"
28 #include "../libcli/auth/libcli_auth.h"
29 #include "librpc/gen_ndr/ndr_secrets.h"
32 #include "dbwrap/dbwrap_open.h"
33 #include "../libcli/security/security.h"
37 #define DBGC_CLASS DBGC_PASSDB
39 static struct db_context *db_ctx;
42 * Use a TDB to store an incrementing random seed.
44 * Initialised to the current pid, the very first time Samba starts,
45 * and incremented by one each time it is needed.
47 * @note Not called by systems with a working /dev/urandom.
49 static void get_rand_seed(void *userdata, int *new_seed)
51 *new_seed = sys_getpid();
53 dbwrap_trans_change_int32_atomic(db_ctx, "INFO/random_seed",
58 /* open up the secrets database */
59 bool secrets_init(void)
67 fname = talloc_asprintf(talloc_tos(), "%s/secrets.tdb",
73 db_ctx = db_open(NULL, fname, 0,
74 TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
77 DEBUG(0,("Failed to open %s\n", fname));
85 * Set a reseed function for the crypto random generator
87 * This avoids a problem where systems without /dev/urandom
88 * could send the same challenge to multiple clients
90 set_rand_reseed_callback(get_rand_seed, NULL);
92 /* Ensure that the reseed is done now, while we are root, etc */
93 generate_random_buffer(&dummy, sizeof(dummy));
98 struct db_context *secrets_db_ctx(void)
100 if (!secrets_init()) {
110 void secrets_shutdown(void)
115 /* read a entry from the secrets database - the caller must free the result
116 if size is non-null then the size of the entry is put in there
118 void *secrets_fetch(const char *key, size_t *size)
123 if (!secrets_init()) {
127 if (db_ctx->fetch(db_ctx, talloc_tos(), string_tdb_data(key),
132 result = memdup(dbuf.dptr, dbuf.dsize);
133 if (result == NULL) {
136 TALLOC_FREE(dbuf.dptr);
145 /* store a secrets entry
147 bool secrets_store(const char *key, const void *data, size_t size)
151 if (!secrets_init()) {
155 status = dbwrap_trans_store(db_ctx, string_tdb_data(key),
156 make_tdb_data((const uint8 *)data, size),
158 return NT_STATUS_IS_OK(status);
162 /* delete a secets database entry
164 bool secrets_delete(const char *key)
167 if (!secrets_init()) {
171 status = dbwrap_trans_delete(db_ctx, string_tdb_data(key));
173 return NT_STATUS_IS_OK(status);
177 * Form a key for fetching a trusted domain password
179 * @param domain trusted domain name
181 * @return stored password's key
183 static char *trustdom_keystr(const char *domain)
187 keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
188 SECRETS_DOMTRUST_ACCT_PASS,
190 SMB_ASSERT(keystr != NULL);
194 /************************************************************************
195 Routine to get account password to trusted domain
196 ************************************************************************/
198 bool secrets_fetch_trusted_domain_password(const char *domain, char** pwd,
199 struct dom_sid *sid, time_t *pass_last_set_time)
201 struct TRUSTED_DOM_PASS pass;
202 enum ndr_err_code ndr_err;
204 /* unpacking structures */
207 /* fetching trusted domain password structure */
208 if (!(blob.data = (uint8_t *)secrets_fetch(trustdom_keystr(domain),
210 DEBUG(5, ("secrets_fetch failed!\n"));
214 /* unpack trusted domain password */
215 ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
216 (ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
218 SAFE_FREE(blob.data);
220 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
225 /* the trust's password */
227 *pwd = SMB_STRDUP(pass.pass);
233 /* last change time */
234 if (pass_last_set_time) *pass_last_set_time = pass.mod_time;
237 if (sid != NULL) sid_copy(sid, &pass.domain_sid);
243 * Routine to store the password for trusted domain
245 * @param domain remote domain name
246 * @param pwd plain text password of trust relationship
247 * @param sid remote domain sid
249 * @return true if succeeded
252 bool secrets_store_trusted_domain_password(const char* domain, const char* pwd,
253 const struct dom_sid *sid)
257 /* packing structures */
259 enum ndr_err_code ndr_err;
260 struct TRUSTED_DOM_PASS pass;
263 pass.uni_name = domain;
264 pass.uni_name_len = strlen(domain)+1;
266 /* last change time */
267 pass.mod_time = time(NULL);
269 /* password of the trust */
270 pass.pass_len = strlen(pwd);
274 sid_copy(&pass.domain_sid, sid);
276 ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), &pass,
277 (ndr_push_flags_fn_t)ndr_push_TRUSTED_DOM_PASS);
278 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
282 ret = secrets_store(trustdom_keystr(domain), blob.data, blob.length);
284 data_blob_free(&blob);
289 /************************************************************************
290 Routine to delete the password for trusted domain
291 ************************************************************************/
293 bool trusted_domain_password_delete(const char *domain)
295 return secrets_delete(trustdom_keystr(domain));
298 bool secrets_store_ldap_pw(const char* dn, char* pw)
303 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, dn) < 0) {
304 DEBUG(0, ("secrets_store_ldap_pw: asprintf failed!\n"));
308 ret = secrets_store(key, pw, strlen(pw)+1);
314 /*******************************************************************
315 Find the ldap password.
316 ******************************************************************/
318 bool fetch_ldap_pw(char **dn, char** pw)
323 *dn = smb_xstrdup(lp_ldap_admin_dn());
325 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
327 DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
331 *pw=(char *)secrets_fetch(key, &size);
335 /* Upgrade 2.2 style entry */
337 char* old_style_key = SMB_STRDUP(*dn);
339 fstring old_style_pw;
341 if (!old_style_key) {
342 DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
346 for (p=old_style_key; *p; p++)
347 if (*p == ',') *p = '/';
349 data=(char *)secrets_fetch(old_style_key, &size);
350 if ((data == NULL) || (size < sizeof(old_style_pw))) {
351 DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
352 SAFE_FREE(old_style_key);
358 size = MIN(size, sizeof(fstring)-1);
359 strncpy(old_style_pw, data, size);
360 old_style_pw[size] = 0;
364 if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
365 DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
366 SAFE_FREE(old_style_key);
370 if (!secrets_delete(old_style_key)) {
371 DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
374 SAFE_FREE(old_style_key);
376 *pw = smb_xstrdup(old_style_pw);
383 * Get trusted domains info from secrets.tdb.
386 struct list_trusted_domains_state {
388 struct trustdom_info **domains;
391 static int list_trusted_domain(struct db_record *rec, void *private_data)
393 const size_t prefix_len = strlen(SECRETS_DOMTRUST_ACCT_PASS);
394 struct TRUSTED_DOM_PASS pass;
395 enum ndr_err_code ndr_err;
397 struct trustdom_info *dom_info;
399 struct list_trusted_domains_state *state =
400 (struct list_trusted_domains_state *)private_data;
402 if ((rec->key.dsize < prefix_len)
403 || (strncmp((char *)rec->key.dptr, SECRETS_DOMTRUST_ACCT_PASS,
408 blob = data_blob_const(rec->value.dptr, rec->value.dsize);
410 ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
411 (ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
412 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
416 if (pass.domain_sid.num_auths != 4) {
417 DEBUG(0, ("SID %s is not a domain sid, has %d "
418 "auths instead of 4\n",
419 sid_string_dbg(&pass.domain_sid),
420 pass.domain_sid.num_auths));
424 if (!(dom_info = talloc(state->domains, struct trustdom_info))) {
425 DEBUG(0, ("talloc failed\n"));
429 dom_info->name = talloc_strdup(dom_info, pass.uni_name);
430 if (!dom_info->name) {
431 TALLOC_FREE(dom_info);
435 sid_copy(&dom_info->sid, &pass.domain_sid);
437 ADD_TO_ARRAY(state->domains, struct trustdom_info *, dom_info,
438 &state->domains, &state->num_domains);
440 if (state->domains == NULL) {
441 state->num_domains = 0;
447 NTSTATUS secrets_trusted_domains(TALLOC_CTX *mem_ctx, uint32 *num_domains,
448 struct trustdom_info ***domains)
450 struct list_trusted_domains_state state;
452 if (!secrets_init()) {
453 return NT_STATUS_ACCESS_DENIED;
456 state.num_domains = 0;
459 * Make sure that a talloc context for the trustdom_info structs
463 if (!(state.domains = talloc_array(
464 mem_ctx, struct trustdom_info *, 1))) {
465 return NT_STATUS_NO_MEMORY;
468 db_ctx->traverse_read(db_ctx, list_trusted_domain, (void *)&state);
470 *num_domains = state.num_domains;
471 *domains = state.domains;
475 /*******************************************************************************
476 Store a complete AFS keyfile into secrets.tdb.
477 *******************************************************************************/
479 bool secrets_store_afs_keyfile(const char *cell, const struct afs_keyfile *keyfile)
483 if ((cell == NULL) || (keyfile == NULL))
486 if (ntohl(keyfile->nkeys) > SECRETS_AFS_MAXKEYS)
489 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
490 return secrets_store(key, keyfile, sizeof(struct afs_keyfile));
493 /*******************************************************************************
494 Fetch the current (highest) AFS key from secrets.tdb
495 *******************************************************************************/
496 bool secrets_fetch_afs_key(const char *cell, struct afs_key *result)
499 struct afs_keyfile *keyfile;
503 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
505 keyfile = (struct afs_keyfile *)secrets_fetch(key, &size);
510 if (size != sizeof(struct afs_keyfile)) {
515 i = ntohl(keyfile->nkeys);
517 if (i > SECRETS_AFS_MAXKEYS) {
522 *result = keyfile->entry[i-1];
524 result->kvno = ntohl(result->kvno);
531 /******************************************************************************
532 When kerberos is not available, choose between anonymous or
533 authenticated connections.
535 We need to use an authenticated connection if DCs have the
536 RestrictAnonymous registry entry set > 0, or the "Additional
537 restrictions for anonymous connections" set in the win2k Local
540 Caller to free() result in domain, username, password
541 *******************************************************************************/
542 void secrets_fetch_ipc_userpass(char **username, char **domain, char **password)
544 *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
545 *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
546 *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
548 if (*username && **username) {
550 if (!*domain || !**domain)
551 *domain = smb_xstrdup(lp_workgroup());
553 if (!*password || !**password)
554 *password = smb_xstrdup("");
556 DEBUG(3, ("IPC$ connections done by user %s\\%s\n",
557 *domain, *username));
560 DEBUG(3, ("IPC$ connections done anonymously\n"));
561 *username = smb_xstrdup("");
562 *domain = smb_xstrdup("");
563 *password = smb_xstrdup("");
567 bool secrets_store_generic(const char *owner, const char *key, const char *secret)
572 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
573 DEBUG(0, ("asprintf failed!\n"));
577 ret = secrets_store(tdbkey, secret, strlen(secret)+1);
583 bool secrets_delete_generic(const char *owner, const char *key)
588 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
589 DEBUG(0, ("asprintf failed!\n"));
593 ret = secrets_delete(tdbkey);
599 /*******************************************************************
600 Find the ldap password.
601 ******************************************************************/
603 char *secrets_fetch_generic(const char *owner, const char *key)
608 if (( ! owner) || ( ! key)) {
609 DEBUG(1, ("Invalid Parameters"));
613 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
614 DEBUG(0, ("Out of memory!\n"));
618 secret = (char *)secrets_fetch(tdbkey, NULL);