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"
31 #include "dbwrap/dbwrap.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
);