2 Unix SMB/CIFS implementation.
4 User credentials handling (as regards on-disk files)
6 Copyright (C) Jelmer Vernooij 2005
7 Copyright (C) Tim Potter 2001
8 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "lib/ldb/include/ldb.h"
27 #include "librpc/gen_ndr/ndr_samr.h" /* for struct samrPassword */
28 #include "passdb/secrets.h"
29 #include "system/filesys.h"
32 * Read a file descriptor, and parse it for a password (eg from a file or stdin)
34 * @param credentials Credentials structure on which to set the password
35 * @param fd open file descriptor to read the password from
36 * @param obtained This enum describes how 'specified' this password is
39 BOOL
cli_credentials_parse_password_fd(struct cli_credentials
*credentials
,
40 int fd
, enum credentials_obtained obtained
)
45 for(p
= pass
, *p
= '\0'; /* ensure that pass is null-terminated */
46 p
&& p
- pass
< sizeof(pass
);) {
47 switch (read(fd
, p
, 1)) {
49 if (*p
!= '\n' && *p
!= '\0') {
50 *++p
= '\0'; /* advance p, and null-terminate pass */
55 *p
= '\0'; /* null-terminate it, just in case... */
56 p
= NULL
; /* then force the loop condition to become false */
59 fprintf(stderr
, "Error reading password from file descriptor %d: %s\n", fd
, "empty password\n");
64 fprintf(stderr
, "Error reading password from file descriptor %d: %s\n",
70 cli_credentials_set_password(credentials
, pass
, obtained
);
75 * Read a named file, and parse it for a password
77 * @param credentials Credentials structure on which to set the password
78 * @param file a named file to read the password from
79 * @param obtained This enum describes how 'specified' this password is
82 BOOL
cli_credentials_parse_password_file(struct cli_credentials
*credentials
, const char *file
, enum credentials_obtained obtained
)
84 int fd
= open(file
, O_RDONLY
, 0);
88 fprintf(stderr
, "Error opening PASSWD_FILE %s: %s\n",
89 file
, strerror(errno
));
93 ret
= cli_credentials_parse_password_fd(credentials
, fd
, obtained
);
101 * Read a named file, and parse it for username, domain, realm and password
103 * @param credentials Credentials structure on which to set the password
104 * @param file a named file to read the details from
105 * @param obtained This enum describes how 'specified' this password is
108 BOOL
cli_credentials_parse_file(struct cli_credentials
*cred
, const char *file
, enum credentials_obtained obtained
)
111 char *ptr
, *val
, *param
;
115 lines
= file_lines_load(file
, &numlines
, NULL
);
119 /* fail if we can't open the credentials file */
120 d_printf("ERROR: Unable to open credentials file!\n");
124 for (i
= 0; i
< numlines
; i
++) {
125 len
= strlen(lines
[i
]);
130 /* break up the line into parameter & value.
131 * will need to eat a little whitespace possibly */
133 if (!(ptr
= strchr_m (lines
[i
], '=')))
139 /* eat leading white space */
140 while ((*val
!='\0') && ((*val
==' ') || (*val
=='\t')))
143 if (strwicmp("password", param
) == 0) {
144 cli_credentials_set_password(cred
, val
, obtained
);
145 } else if (strwicmp("username", param
) == 0) {
146 cli_credentials_set_username(cred
, val
, obtained
);
147 } else if (strwicmp("domain", param
) == 0) {
148 cli_credentials_set_domain(cred
, val
, obtained
);
149 } else if (strwicmp("realm", param
) == 0) {
150 cli_credentials_set_realm(cred
, val
, obtained
);
152 memset(lines
[i
], 0, len
);
162 * Fill in credentials for the machine trust account, from the secrets database.
164 * @param cred Credentials structure to fill in
165 * @retval NTSTATUS error detailing any failure
167 NTSTATUS
cli_credentials_set_secrets(struct cli_credentials
*cred
,
173 struct ldb_context
*ldb
;
175 struct ldb_message
**msgs
;
176 const char *attrs
[] = {
184 "msDS-KeyVersionNumber",
191 const char *machine_account
;
192 const char *password
;
193 const char *old_password
;
196 enum netr_SchannelType sct
;
197 const char *salt_principal
;
200 /* ok, we are going to get it now, don't recurse back here */
201 cred
->machine_account_pending
= False
;
203 /* some other parts of the system will key off this */
204 cred
->machine_account
= True
;
206 mem_ctx
= talloc_named(cred
, 0, "cli_credentials fetch machine password");
208 /* Local secrets are stored in secrets.ldb */
209 ldb
= secrets_db_connect(mem_ctx
);
211 /* set anonymous as the fallback, if the machine account won't work */
212 cli_credentials_set_anonymous(cred
);
213 DEBUG(1, ("Could not open secrets.ldb\n"));
214 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
217 /* search for the secret record */
218 ldb_ret
= gendb_search(ldb
,
219 mem_ctx
, ldb_dn_explode(mem_ctx
, base
),
223 DEBUG(1, ("Could not find entry to match filter: %s\n",
225 /* set anonymous as the fallback, if the machine account won't work */
226 cli_credentials_set_anonymous(cred
);
227 talloc_free(mem_ctx
);
228 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
229 } else if (ldb_ret
!= 1) {
230 DEBUG(1, ("Found more than one (%d) entry to match filter: %s\n",
232 /* set anonymous as the fallback, if the machine account won't work */
233 cli_credentials_set_anonymous(cred
);
234 talloc_free(mem_ctx
);
235 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
238 password
= ldb_msg_find_string(msgs
[0], "secret", NULL
);
239 old_password
= ldb_msg_find_string(msgs
[0], "priorSecret", NULL
);
241 machine_account
= ldb_msg_find_string(msgs
[0], "samAccountName", NULL
);
243 if (!machine_account
) {
244 DEBUG(1, ("Could not find 'samAccountName' in join record to domain: %s\n",
245 cli_credentials_get_domain(cred
)));
246 /* set anonymous as the fallback, if the machine account won't work */
247 cli_credentials_set_anonymous(cred
);
248 talloc_free(mem_ctx
);
249 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
252 salt_principal
= ldb_msg_find_string(msgs
[0], "saltPrincipal", NULL
);
253 cli_credentials_set_salt_principal(cred
, salt_principal
);
255 sct
= ldb_msg_find_int(msgs
[0], "secureChannelType", 0);
257 cli_credentials_set_secure_channel_type(cred
, sct
);
261 const struct ldb_val
*nt_password_hash
= ldb_msg_find_ldb_val(msgs
[0], "ntPwdHash");
262 struct samr_Password hash
;
264 if (nt_password_hash
) {
265 memcpy(hash
.hash
, nt_password_hash
->data
,
266 MIN(nt_password_hash
->length
, sizeof(hash
.hash
)));
268 cli_credentials_set_nt_hash(cred
, &hash
, CRED_SPECIFIED
);
271 DEBUG(1, ("Could not find 'secret' in join record to domain: %s\n",
272 cli_credentials_get_domain(cred
)));
274 /* set anonymous as the fallback, if the machine account won't work */
275 cli_credentials_set_anonymous(cred
);
277 talloc_free(mem_ctx
);
278 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
282 domain
= ldb_msg_find_string(msgs
[0], "flatname", NULL
);
284 cli_credentials_set_domain(cred
, domain
, CRED_SPECIFIED
);
287 realm
= ldb_msg_find_string(msgs
[0], "realm", NULL
);
289 cli_credentials_set_realm(cred
, realm
, CRED_SPECIFIED
);
292 cli_credentials_set_username(cred
, machine_account
, CRED_SPECIFIED
);
294 cli_credentials_set_password(cred
, password
, CRED_SPECIFIED
);
297 cli_credentials_set_kvno(cred
, ldb_msg_find_int(msgs
[0], "msDS-KeyVersionNumber", 0));
299 /* If there was an external keytab specified by reference in
300 * the LDB, then use this. Otherwise we will make one up
301 * (chewing CPU time) from the password */
302 keytab
= ldb_msg_find_string(msgs
[0], "krb5Keytab", NULL
);
304 cli_credentials_set_keytab_name(cred
, keytab
, CRED_SPECIFIED
);
306 keytab
= ldb_msg_find_string(msgs
[0], "privateKeytab", NULL
);
308 keytab
= talloc_asprintf(mem_ctx
, "FILE:%s", private_path(mem_ctx
, keytab
));
310 cli_credentials_set_keytab_name(cred
, keytab
, CRED_SPECIFIED
);
314 talloc_free(mem_ctx
);
320 * Fill in credentials for the machine trust account, from the secrets database.
322 * @param cred Credentials structure to fill in
323 * @retval NTSTATUS error detailing any failure
325 NTSTATUS
cli_credentials_set_machine_account(struct cli_credentials
*cred
)
328 /* Bleh, nasty recursion issues: We are setting a machine
329 * account here, so we don't want the 'pending' flag around
331 cred
->machine_account_pending
= False
;
332 filter
= talloc_asprintf(cred
, SECRETS_PRIMARY_DOMAIN_FILTER
,
333 cli_credentials_get_domain(cred
));
334 return cli_credentials_set_secrets(cred
, SECRETS_PRIMARY_DOMAIN_DN
,
339 * Fill in credentials for the machine trust account, from the secrets database.
341 * @param cred Credentials structure to fill in
342 * @retval NTSTATUS error detailing any failure
344 NTSTATUS
cli_credentials_set_krbtgt(struct cli_credentials
*cred
)
347 /* Bleh, nasty recursion issues: We are setting a machine
348 * account here, so we don't want the 'pending' flag around
350 cred
->machine_account_pending
= False
;
351 filter
= talloc_asprintf(cred
, SECRETS_KRBTGT_SEARCH
,
352 cli_credentials_get_realm(cred
),
353 cli_credentials_get_domain(cred
));
354 return cli_credentials_set_secrets(cred
, SECRETS_PRINCIPALS_DN
,
359 * Fill in credentials for the machine trust account, from the secrets database.
361 * @param cred Credentials structure to fill in
362 * @retval NTSTATUS error detailing any failure
364 NTSTATUS
cli_credentials_set_stored_principal(struct cli_credentials
*cred
,
365 const char *serviceprincipal
)
368 /* Bleh, nasty recursion issues: We are setting a machine
369 * account here, so we don't want the 'pending' flag around
371 cred
->machine_account_pending
= False
;
372 filter
= talloc_asprintf(cred
, SECRETS_PRINCIPAL_SEARCH
,
373 cli_credentials_get_realm(cred
),
374 cli_credentials_get_domain(cred
),
376 return cli_credentials_set_secrets(cred
, SECRETS_PRINCIPALS_DN
,
381 * Ask that when required, the credentials system will be filled with
382 * machine trust account, from the secrets database.
384 * @param cred Credentials structure to fill in
385 * @note This function is used to call the above function after, rather
386 * than during, popt processing.
389 void cli_credentials_set_machine_account_pending(struct cli_credentials
*cred
)
391 cred
->machine_account_pending
= True
;
395 NTSTATUS
cli_credentials_update_all_keytabs(TALLOC_CTX
*parent_ctx
)
399 struct ldb_context
*ldb
;
400 struct ldb_message
**msgs
;
401 const char *attrs
[] = { NULL
};
402 struct cli_credentials
*creds
;
407 mem_ctx
= talloc_new(parent_ctx
);
409 return NT_STATUS_NO_MEMORY
;
412 /* Local secrets are stored in secrets.ldb */
413 ldb
= secrets_db_connect(mem_ctx
);
415 DEBUG(1, ("Could not open secrets.ldb\n"));
416 talloc_free(mem_ctx
);
417 return NT_STATUS_ACCESS_DENIED
;
420 /* search for the secret record */
421 ldb_ret
= gendb_search(ldb
,
424 "objectClass=kerberosSecret");
426 DEBUG(1, ("Error looking for kerberos type secrets to push into a keytab"));
427 talloc_free(mem_ctx
);
428 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
431 for (i
=0; i
< ldb_ret
; i
++) {
432 /* Make a credentials structure from it */
433 creds
= cli_credentials_init(mem_ctx
);
435 DEBUG(1, ("cli_credentials_init failed!"));
436 talloc_free(mem_ctx
);
437 return NT_STATUS_NO_MEMORY
;
439 cli_credentials_set_conf(creds
);
440 filter
= talloc_asprintf(mem_ctx
, "dn=%s", ldb_dn_linearize(mem_ctx
, msgs
[i
]->dn
));
441 status
= cli_credentials_set_secrets(creds
, NULL
, filter
);
442 if (!NT_STATUS_IS_OK(status
)) {
443 DEBUG(1, ("Failed to read secrets for keytab update for %s\n",
445 talloc_free(mem_ctx
);
448 ret
= cli_credentials_update_keytab(creds
);
450 DEBUG(1, ("Failed to update keytab for %s\n",
452 talloc_free(mem_ctx
);
453 return NT_STATUS_UNSUCCESSFUL
;