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"
30 #include "dbwrap/dbwrap.h"
31 #include "dbwrap/dbwrap_open.h"
32 #include "../libcli/security/security.h"
36 #define DBGC_CLASS DBGC_PASSDB
38 static struct db_context *db_ctx;
41 * Use a TDB to store an incrementing random seed.
43 * Initialised to the current pid, the very first time Samba starts,
44 * and incremented by one each time it is needed.
46 * @note Not called by systems with a working /dev/urandom.
48 static void get_rand_seed(void *userdata, int *new_seed)
52 dbwrap_trans_change_int32_atomic_bystring(
53 db_ctx, "INFO/random_seed", new_seed, 1);
57 /* open up the secrets database with specified private_dir path */
58 bool secrets_init_path(const char *private_dir)
67 if (private_dir == NULL) {
71 fname = talloc_asprintf(talloc_tos(), "%s/secrets.tdb",
77 db_ctx = db_open(NULL, fname, 0,
78 TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
82 DEBUG(0,("Failed to open %s\n", fname));
89 * Set a reseed function for the crypto random generator
91 * This avoids a problem where systems without /dev/urandom
92 * could send the same challenge to multiple clients
94 set_rand_reseed_callback(get_rand_seed, NULL);
96 /* Ensure that the reseed is done now, while we are root, etc */
97 generate_random_buffer(&dummy, sizeof(dummy));
102 /* open up the secrets database */
103 bool secrets_init(void)
105 return secrets_init_path(lp_private_dir());
108 struct db_context *secrets_db_ctx(void)
110 if (!secrets_init()) {
120 void secrets_shutdown(void)
125 /* read a entry from the secrets database - the caller must free the result
126 if size is non-null then the size of the entry is put in there
128 void *secrets_fetch(const char *key, size_t *size)
134 if (!secrets_init()) {
138 status = dbwrap_fetch(db_ctx, talloc_tos(), string_tdb_data(key),
140 if (!NT_STATUS_IS_OK(status)) {
144 result = memdup(dbuf.dptr, dbuf.dsize);
145 if (result == NULL) {
148 TALLOC_FREE(dbuf.dptr);
157 /* store a secrets entry
159 bool secrets_store(const char *key, const void *data, size_t size)
163 if (!secrets_init()) {
167 status = dbwrap_trans_store(db_ctx, string_tdb_data(key),
168 make_tdb_data((const uint8 *)data, size),
170 return NT_STATUS_IS_OK(status);
174 /* delete a secets database entry
176 bool secrets_delete(const char *key)
179 if (!secrets_init()) {
183 status = dbwrap_trans_delete(db_ctx, string_tdb_data(key));
185 return NT_STATUS_IS_OK(status);
189 * Form a key for fetching a trusted domain password
191 * @param domain trusted domain name
193 * @return stored password's key
195 static char *trustdom_keystr(const char *domain)
199 keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
200 SECRETS_DOMTRUST_ACCT_PASS,
202 SMB_ASSERT(keystr != NULL);
206 /************************************************************************
207 Routine to get account password to trusted domain
208 ************************************************************************/
210 bool secrets_fetch_trusted_domain_password(const char *domain, char** pwd,
211 struct dom_sid *sid, time_t *pass_last_set_time)
213 struct TRUSTED_DOM_PASS pass;
214 enum ndr_err_code ndr_err;
216 /* unpacking structures */
219 /* fetching trusted domain password structure */
220 if (!(blob.data = (uint8_t *)secrets_fetch(trustdom_keystr(domain),
222 DEBUG(5, ("secrets_fetch failed!\n"));
226 /* unpack trusted domain password */
227 ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
228 (ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
230 SAFE_FREE(blob.data);
232 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
237 /* the trust's password */
239 *pwd = SMB_STRDUP(pass.pass);
245 /* last change time */
246 if (pass_last_set_time) *pass_last_set_time = pass.mod_time;
249 if (sid != NULL) sid_copy(sid, &pass.domain_sid);
255 * Routine to store the password for trusted domain
257 * @param domain remote domain name
258 * @param pwd plain text password of trust relationship
259 * @param sid remote domain sid
261 * @return true if succeeded
264 bool secrets_store_trusted_domain_password(const char* domain, const char* pwd,
265 const struct dom_sid *sid)
269 /* packing structures */
271 enum ndr_err_code ndr_err;
272 struct TRUSTED_DOM_PASS pass;
275 pass.uni_name = domain;
276 pass.uni_name_len = strlen(domain)+1;
278 /* last change time */
279 pass.mod_time = time(NULL);
281 /* password of the trust */
282 pass.pass_len = strlen(pwd);
286 sid_copy(&pass.domain_sid, sid);
288 ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), &pass,
289 (ndr_push_flags_fn_t)ndr_push_TRUSTED_DOM_PASS);
290 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
294 ret = secrets_store(trustdom_keystr(domain), blob.data, blob.length);
296 data_blob_free(&blob);
301 /************************************************************************
302 Routine to delete the password for trusted domain
303 ************************************************************************/
305 bool trusted_domain_password_delete(const char *domain)
307 return secrets_delete(trustdom_keystr(domain));
310 bool secrets_store_ldap_pw(const char* dn, char* pw)
315 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, dn) < 0) {
316 DEBUG(0, ("secrets_store_ldap_pw: asprintf failed!\n"));
320 ret = secrets_store(key, pw, strlen(pw)+1);
326 /*******************************************************************
327 Find the ldap password.
328 ******************************************************************/
330 bool fetch_ldap_pw(char **dn, char** pw)
335 *dn = smb_xstrdup(lp_ldap_admin_dn(talloc_tos()));
337 if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
339 DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
343 *pw=(char *)secrets_fetch(key, &size);
347 /* Upgrade 2.2 style entry */
349 char* old_style_key = SMB_STRDUP(*dn);
351 fstring old_style_pw;
353 if (!old_style_key) {
354 DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
358 for (p=old_style_key; *p; p++)
359 if (*p == ',') *p = '/';
361 data=(char *)secrets_fetch(old_style_key, &size);
362 if ((data == NULL) || (size < sizeof(old_style_pw))) {
363 DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
364 SAFE_FREE(old_style_key);
370 size = MIN(size, sizeof(fstring)-1);
371 strncpy(old_style_pw, data, size);
372 old_style_pw[size] = 0;
376 if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
377 DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
378 SAFE_FREE(old_style_key);
382 if (!secrets_delete(old_style_key)) {
383 DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
386 SAFE_FREE(old_style_key);
388 *pw = smb_xstrdup(old_style_pw);
394 /*******************************************************************************
395 Store a complete AFS keyfile into secrets.tdb.
396 *******************************************************************************/
398 bool secrets_store_afs_keyfile(const char *cell, const struct afs_keyfile *keyfile)
402 if ((cell == NULL) || (keyfile == NULL))
405 if (ntohl(keyfile->nkeys) > SECRETS_AFS_MAXKEYS)
408 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
409 return secrets_store(key, keyfile, sizeof(struct afs_keyfile));
412 /*******************************************************************************
413 Fetch the current (highest) AFS key from secrets.tdb
414 *******************************************************************************/
415 bool secrets_fetch_afs_key(const char *cell, struct afs_key *result)
418 struct afs_keyfile *keyfile;
422 slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
424 keyfile = (struct afs_keyfile *)secrets_fetch(key, &size);
429 if (size != sizeof(struct afs_keyfile)) {
434 i = ntohl(keyfile->nkeys);
436 if (i > SECRETS_AFS_MAXKEYS) {
441 *result = keyfile->entry[i-1];
443 result->kvno = ntohl(result->kvno);
450 /******************************************************************************
451 When kerberos is not available, choose between anonymous or
452 authenticated connections.
454 We need to use an authenticated connection if DCs have the
455 RestrictAnonymous registry entry set > 0, or the "Additional
456 restrictions for anonymous connections" set in the win2k Local
459 Caller to free() result in domain, username, password
460 *******************************************************************************/
461 void secrets_fetch_ipc_userpass(char **username, char **domain, char **password)
463 *username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
464 *domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
465 *password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
467 if (*username && **username) {
469 if (!*domain || !**domain)
470 *domain = smb_xstrdup(lp_workgroup());
472 if (!*password || !**password)
473 *password = smb_xstrdup("");
475 DEBUG(3, ("IPC$ connections done by user %s\\%s\n",
476 *domain, *username));
479 DEBUG(3, ("IPC$ connections done anonymously\n"));
480 *username = smb_xstrdup("");
481 *domain = smb_xstrdup("");
482 *password = smb_xstrdup("");
486 bool secrets_store_generic(const char *owner, const char *key, const char *secret)
491 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
492 DEBUG(0, ("asprintf failed!\n"));
496 ret = secrets_store(tdbkey, secret, strlen(secret)+1);
502 /*******************************************************************
503 Find the ldap password.
504 ******************************************************************/
506 char *secrets_fetch_generic(const char *owner, const char *key)
511 if (( ! owner) || ( ! key)) {
512 DEBUG(1, ("Invalid Parameters"));
516 if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
517 DEBUG(0, ("Out of memory!\n"));
521 secret = (char *)secrets_fetch(tdbkey, NULL);