2 Unix SMB/CIFS implementation.
4 Copyright (C) Jelmer Vernooij 2005
5 Copyright (C) Tim Potter 2001
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
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 2 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, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "system/filesys.h"
25 #include "include/secrets.h"
26 #include "lib/ldb/include/ldb.h"
27 #include "librpc/gen_ndr/ndr_samr.h" /* for struct samrPassword */
30 * Create a new credentials structure
31 * @param mem_ctx TALLOC_CTX parent for credentials structure
33 struct cli_credentials
*cli_credentials_init(TALLOC_CTX
*mem_ctx
)
35 struct cli_credentials
*cred
= talloc(mem_ctx
, struct cli_credentials
);
40 cred
->netlogon_creds
= NULL
;
41 cred
->machine_account_pending
= False
;
42 cred
->workstation_obtained
= CRED_UNINITIALISED
;
43 cred
->username_obtained
= CRED_UNINITIALISED
;
44 cred
->password_obtained
= CRED_UNINITIALISED
;
45 cred
->domain_obtained
= CRED_UNINITIALISED
;
46 cred
->realm_obtained
= CRED_UNINITIALISED
;
51 * Obtain the username for this credentials context.
52 * @param cred credentials context
53 * @retval The username set on this context.
54 * @note Return value will never be NULL except by programmer error.
56 const char *cli_credentials_get_username(struct cli_credentials
*cred
)
58 if (cred
->machine_account_pending
) {
59 cli_credentials_set_machine_account(cred
);
62 if (cred
->username_obtained
== CRED_CALLBACK
) {
63 cred
->username
= cred
->username_cb(cred
);
64 cred
->username_obtained
= CRED_SPECIFIED
;
67 return cred
->username
;
70 BOOL
cli_credentials_set_username(struct cli_credentials
*cred
, const char *val
, enum credentials_obtained obtained
)
72 if (obtained
>= cred
->username_obtained
) {
73 cred
->username
= talloc_strdup(cred
, val
);
74 cred
->username_obtained
= obtained
;
82 * Obtain the password for this credentials context.
83 * @param cred credentials context
84 * @retval If set, the cleartext password, otherwise NULL
86 const char *cli_credentials_get_password(struct cli_credentials
*cred
)
88 if (cred
->machine_account_pending
) {
89 cli_credentials_set_machine_account(cred
);
92 if (cred
->password_obtained
== CRED_CALLBACK
) {
93 cred
->password
= cred
->password_cb(cred
);
94 cred
->password_obtained
= CRED_SPECIFIED
;
97 return cred
->password
;
100 BOOL
cli_credentials_set_password(struct cli_credentials
*cred
, const char *val
, enum credentials_obtained obtained
)
102 if (obtained
>= cred
->password_obtained
) {
103 cred
->password
= talloc_strdup(cred
, val
);
104 cred
->password_obtained
= obtained
;
106 cred
->nt_hash
= NULL
;
114 * Obtain the password for this credentials context.
115 * @param cred credentials context
116 * @retval If set, the cleartext password, otherwise NULL
118 const struct samr_Password
*cli_credentials_get_nt_hash(struct cli_credentials
*cred
,
121 const char *password
= cli_credentials_get_password(cred
);
124 struct samr_Password
*nt_hash
= talloc(mem_ctx
, struct samr_Password
);
129 E_md4hash(password
, nt_hash
->hash
);
133 return cred
->nt_hash
;
137 BOOL
cli_credentials_set_nt_hash(struct cli_credentials
*cred
,
138 const struct samr_Password
*nt_hash
,
139 enum credentials_obtained obtained
)
141 if (obtained
>= cred
->password_obtained
) {
142 cli_credentials_set_password(cred
, NULL
, obtained
);
143 cred
->nt_hash
= talloc(cred
, struct samr_Password
);
144 *cred
->nt_hash
= *nt_hash
;
152 * Obtain the 'short' or 'NetBIOS' domain for this credentials context.
153 * @param cred credentials context
154 * @retval The domain set on this context.
155 * @note Return value will never be NULL except by programmer error.
157 const char *cli_credentials_get_domain(struct cli_credentials
*cred
)
159 if (cred
->machine_account_pending
) {
160 cli_credentials_set_machine_account(cred
);
163 if (cred
->domain_obtained
== CRED_CALLBACK
) {
164 cred
->domain
= cred
->domain_cb(cred
);
165 cred
->domain_obtained
= CRED_SPECIFIED
;
172 BOOL
cli_credentials_set_domain(struct cli_credentials
*cred
, const char *val
, enum credentials_obtained obtained
)
174 if (obtained
>= cred
->domain_obtained
) {
175 cred
->domain
= talloc_strdup(cred
, val
);
176 cred
->domain_obtained
= obtained
;
184 * Obtain the Kerberos realm for this credentials context.
185 * @param cred credentials context
186 * @retval The realm set on this context.
187 * @note Return value will never be NULL except by programmer error.
189 const char *cli_credentials_get_realm(struct cli_credentials
*cred
)
191 if (cred
->machine_account_pending
) {
192 cli_credentials_set_machine_account(cred
);
195 if (cred
->realm_obtained
== CRED_CALLBACK
) {
196 cred
->realm
= cred
->realm_cb(cred
);
197 cred
->realm_obtained
= CRED_SPECIFIED
;
204 * Obtain the user's Kerberos principal for this credentials context.
205 * @param cred credentials context
206 * @param mem_ctx A talloc context to return the prinipal name on.
207 * @retval The user's Kerberos principal
208 * @note Return value may be NULL due to out-of memeory or invalid mem_ctx
210 char *cli_credentials_get_principal(struct cli_credentials
*cred
,
213 return talloc_asprintf(mem_ctx
, "%s@%s",
214 cli_credentials_get_username(cred
),
215 cli_credentials_get_realm(cred
));
219 * Set the realm for this credentials context, and force it to
220 * uppercase for the sainity of our local kerberos libraries
222 BOOL
cli_credentials_set_realm(struct cli_credentials
*cred
, const char *val
, enum credentials_obtained obtained
)
224 if (obtained
>= cred
->realm_obtained
) {
225 cred
->realm
= strupper_talloc(cred
, val
);
226 cred
->realm_obtained
= obtained
;
234 * Obtain the 'short' or 'NetBIOS' workstation name for this credentials context.
236 * @param cred credentials context
237 * @retval The workstation name set on this context.
238 * @note Return value will never be NULL except by programmer error.
240 const char *cli_credentials_get_workstation(struct cli_credentials
*cred
)
242 if (cred
->workstation_obtained
== CRED_CALLBACK
) {
243 cred
->workstation
= cred
->workstation_cb(cred
);
244 cred
->workstation_obtained
= CRED_SPECIFIED
;
247 return cred
->workstation
;
250 BOOL
cli_credentials_set_workstation(struct cli_credentials
*cred
, const char *val
, enum credentials_obtained obtained
)
252 if (obtained
>= cred
->workstation_obtained
) {
253 cred
->workstation
= talloc_strdup(cred
, val
);
254 cred
->workstation_obtained
= obtained
;
262 * Read a file descriptor, and parse it for a password (eg from a file or stdin)
264 * @param credentials Credentials structure on which to set the password
265 * @param fd open file descriptor to read the password from
266 * @param obtained This enum describes how 'specified' this password is
269 BOOL
cli_credentials_parse_password_fd(struct cli_credentials
*credentials
, int fd
, enum credentials_obtained obtained
)
274 for(p
= pass
, *p
= '\0'; /* ensure that pass is null-terminated */
275 p
&& p
- pass
< sizeof(pass
);) {
276 switch (read(fd
, p
, 1)) {
278 if (*p
!= '\n' && *p
!= '\0') {
279 *++p
= '\0'; /* advance p, and null-terminate pass */
284 *p
= '\0'; /* null-terminate it, just in case... */
285 p
= NULL
; /* then force the loop condition to become false */
288 fprintf(stderr
, "Error reading password from file descriptor %d: %s\n", fd
, "empty password\n");
293 fprintf(stderr
, "Error reading password from file descriptor %d: %s\n",
294 fd
, strerror(errno
));
299 cli_credentials_set_password(credentials
, pass
, obtained
);
304 * Read a named file, and parse it for a password
306 * @param credentials Credentials structure on which to set the password
307 * @param file a named file to read the password from
308 * @param obtained This enum describes how 'specified' this password is
311 BOOL
cli_credentials_parse_password_file(struct cli_credentials
*credentials
, const char *file
, enum credentials_obtained obtained
)
313 int fd
= open(file
, O_RDONLY
, 0);
317 fprintf(stderr
, "Error opening PASSWD_FILE %s: %s\n",
318 file
, strerror(errno
));
322 ret
= cli_credentials_parse_password_fd(credentials
, fd
, obtained
);
330 * Read a named file, and parse it for username, domain, realm and password
332 * @param credentials Credentials structure on which to set the password
333 * @param file a named file to read the details from
334 * @param obtained This enum describes how 'specified' this password is
337 BOOL
cli_credentials_parse_file(struct cli_credentials
*cred
, const char *file
, enum credentials_obtained obtained
)
342 char *ptr
, *val
, *param
;
344 if ((auth
=x_fopen(file
, O_RDONLY
, 0)) == NULL
)
346 /* fail if we can't open the credentials file */
347 d_printf("ERROR: Unable to open credentials file!\n");
351 while (!x_feof(auth
))
353 /* get a line from the file */
354 if (!x_fgets(buf
, sizeof(buf
), auth
))
358 if ((len
) && (buf
[len
-1]=='\n'))
366 /* break up the line into parameter & value.
367 * will need to eat a little whitespace possibly */
369 if (!(ptr
= strchr_m (buf
, '=')))
375 /* eat leading white space */
376 while ((*val
!='\0') && ((*val
==' ') || (*val
=='\t')))
379 if (strwicmp("password", param
) == 0) {
380 cli_credentials_set_password(cred
, val
, obtained
);
381 } else if (strwicmp("username", param
) == 0) {
382 cli_credentials_set_username(cred
, val
, obtained
);
383 } else if (strwicmp("domain", param
) == 0) {
384 cli_credentials_set_domain(cred
, val
, obtained
);
385 } else if (strwicmp("realm", param
) == 0) {
386 cli_credentials_set_realm(cred
, val
, obtained
);
388 memset(buf
, 0, sizeof(buf
));
397 * Given a string, typically obtained from a -U argument, parse it into domain, username, realm and password fields
399 * The format accepted is [domain\\]user[%password] or user[@realm][%password]
401 * @param credentials Credentials structure on which to set the password
402 * @param data the string containing the username, password etc
403 * @param obtained This enum describes how 'specified' this password is
406 void cli_credentials_parse_string(struct cli_credentials
*credentials
, const char *data
, enum credentials_obtained obtained
)
410 if (strcmp("%",data
) == 0) {
411 cli_credentials_set_anonymous(credentials
);
415 uname
= talloc_strdup(credentials
, data
);
416 if ((p
= strchr_m(uname
,'%'))) {
418 cli_credentials_set_password(credentials
, p
+1, obtained
);
421 if ((p
= strchr_m(uname
,'@'))) {
423 cli_credentials_set_realm(credentials
, p
+1, obtained
);
424 } else if ((p
= strchr_m(uname
,'\\')) || (p
= strchr_m(uname
, '/'))) {
426 cli_credentials_set_domain(credentials
, uname
, obtained
);
429 cli_credentials_set_username(credentials
, uname
, obtained
);
433 * Specifies default values for domain, workstation and realm
434 * from the smb.conf configuration file
436 * @param cred Credentials structure to fill in
438 void cli_credentials_set_conf(struct cli_credentials
*cred
)
440 cli_credentials_set_domain(cred
, lp_workgroup(), CRED_GUESSED
);
441 cli_credentials_set_workstation(cred
, lp_netbios_name(), CRED_GUESSED
);
442 cli_credentials_set_realm(cred
, lp_realm(), CRED_GUESSED
);
446 * Guess defaults for credentials from environment variables,
447 * and from the configuration file
449 * @param cred Credentials structure to fill in
451 void cli_credentials_guess(struct cli_credentials
*cred
)
455 cli_credentials_set_username(cred
, "", CRED_GUESSED
);
456 cli_credentials_set_conf(cred
);
458 if (getenv("LOGNAME")) {
459 cli_credentials_set_username(cred
, getenv("LOGNAME"), CRED_GUESSED
);
462 if (getenv("USER")) {
463 cli_credentials_parse_string(cred
, getenv("USER"), CRED_GUESSED
);
464 if ((p
= strchr_m(getenv("USER"),'%'))) {
465 memset(p
,0,strlen(cred
->password
));
469 if (getenv("DOMAIN")) {
470 cli_credentials_set_domain(cred
, getenv("DOMAIN"), CRED_GUESSED
);
473 if (getenv("PASSWD")) {
474 cli_credentials_set_password(cred
, getenv("PASSWD"), CRED_GUESSED
);
477 if (getenv("PASSWD_FD")) {
478 cli_credentials_parse_password_fd(cred
, atoi(getenv("PASSWD_FD")), CRED_GUESSED
);
481 if (getenv("PASSWD_FILE")) {
482 cli_credentials_parse_password_file(cred
, getenv("PASSWD_FILE"), CRED_GUESSED
);
487 * Fill in credentials for the machine trust account, from the secrets database.
489 * @param cred Credentials structure to fill in
490 * @retval NTSTATUS error detailing any failure
492 NTSTATUS
cli_credentials_set_machine_account(struct cli_credentials
*cred
)
496 struct ldb_context
*ldb
;
498 struct ldb_message
**msgs
;
499 const char *base_dn
= SECRETS_PRIMARY_DOMAIN_DN
;
500 const char *attrs
[] = {
507 "msDS-KeyVersionNumber",
511 const char *machine_account
;
512 const char *password
;
515 enum netr_SchannelType sct
;
517 /* ok, we are going to get it now, don't recurse back here */
518 cred
->machine_account_pending
= False
;
520 mem_ctx
= talloc_named(cred
, 0, "cli_credentials fetch machine password");
521 /* Local secrets are stored in secrets.ldb */
522 ldb
= secrets_db_connect(mem_ctx
);
524 DEBUG(1, ("Could not open secrets.ldb\n"));
525 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
528 /* search for the secret record */
529 ldb_ret
= gendb_search(ldb
,
530 mem_ctx
, base_dn
, &msgs
, attrs
,
531 SECRETS_PRIMARY_DOMAIN_FILTER
,
532 cli_credentials_get_domain(cred
));
534 DEBUG(1, ("Could not find join record to domain: %s\n",
535 cli_credentials_get_domain(cred
)));
536 talloc_free(mem_ctx
);
537 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
538 } else if (ldb_ret
!= 1) {
539 DEBUG(1, ("Found more than one (%d) join records to domain: %s\n",
540 ldb_ret
, cli_credentials_get_domain(cred
)));
541 talloc_free(mem_ctx
);
542 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
545 password
= ldb_msg_find_string(msgs
[0], "secret", NULL
);
547 machine_account
= ldb_msg_find_string(msgs
[0], "samAccountName", NULL
);
549 if (!machine_account
) {
550 DEBUG(1, ("Could not find 'samAccountName' in join record to domain: %s\n",
551 cli_credentials_get_domain(cred
)));
552 talloc_free(mem_ctx
);
553 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
556 sct
= ldb_msg_find_int(msgs
[0], "secureChannelType", 0);
558 DEBUG(1, ("Domain join for acocunt %s did not have a secureChannelType set!\n",
560 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
564 const struct ldb_val
*nt_password_hash
= ldb_msg_find_ldb_val(msgs
[0], "ntPwdHash");
565 struct samr_Password hash
;
567 if (nt_password_hash
) {
568 memcpy(hash
.hash
, nt_password_hash
->data
,
569 MIN(nt_password_hash
->length
, sizeof(hash
.hash
)));
571 cli_credentials_set_nt_hash(cred
, &hash
, CRED_SPECIFIED
);
574 DEBUG(1, ("Could not find 'secret' in join record to domain: %s\n",
575 cli_credentials_get_domain(cred
)));
576 talloc_free(mem_ctx
);
577 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO
;
581 cli_credentials_set_secure_channel_type(cred
, sct
);
583 domain
= ldb_msg_find_string(msgs
[0], "flatname", NULL
);
585 cli_credentials_set_domain(cred
, domain
, CRED_SPECIFIED
);
588 realm
= ldb_msg_find_string(msgs
[0], "realm", NULL
);
590 cli_credentials_set_realm(cred
, realm
, CRED_SPECIFIED
);
593 cli_credentials_set_username(cred
, machine_account
, CRED_SPECIFIED
);
595 cli_credentials_set_password(cred
, password
, CRED_SPECIFIED
);
598 cli_credentials_set_kvno(cred
, ldb_msg_find_int(msgs
[0], "msDS-KeyVersionNumber", 0));
600 talloc_free(mem_ctx
);
606 * Ask that when required, the credentials system will be filled with
607 * machine trust account, from the secrets database.
609 * @param cred Credentials structure to fill in
610 * @note This function is used to call the above function after, rather
611 * than during, popt processing.
614 void cli_credentials_set_machine_account_pending(struct cli_credentials
*cred
)
616 cred
->machine_account_pending
= True
;
620 * Attach NETLOGON credentials for use with SCHANNEL
623 void cli_credentials_set_netlogon_creds(struct cli_credentials
*cred
,
624 struct creds_CredentialState
*netlogon_creds
)
626 cred
->netlogon_creds
= talloc_reference(cred
, netlogon_creds
);
630 * Return attached NETLOGON credentials
633 struct creds_CredentialState
*cli_credentials_get_netlogon_creds(struct cli_credentials
*cred
)
635 return cred
->netlogon_creds
;
639 * Set NETLOGON secure channel type
642 void cli_credentials_set_secure_channel_type(struct cli_credentials
*cred
,
643 enum netr_SchannelType secure_channel_type
)
645 cred
->secure_channel_type
= secure_channel_type
;
649 * Return NETLOGON secure chanel type
652 enum netr_SchannelType
cli_credentials_get_secure_channel_type(struct cli_credentials
*cred
)
654 return cred
->secure_channel_type
;
661 void cli_credentials_set_kvno(struct cli_credentials
*cred
,
668 * Return Kerberos KVNO
671 int cli_credentials_get_kvno(struct cli_credentials
*cred
)
677 * Fill in a credentials structure as the anonymous user
679 void cli_credentials_set_anonymous(struct cli_credentials
*cred
)
681 cli_credentials_set_username(cred
, "", CRED_SPECIFIED
);
682 cli_credentials_set_domain(cred
, "", CRED_SPECIFIED
);
683 cli_credentials_set_password(cred
, NULL
, CRED_SPECIFIED
);
687 * Describe a credentials context as anonymous or authenticated
688 * @retval True if anonymous, False if a username is specified
691 BOOL
cli_credentials_is_anonymous(struct cli_credentials
*cred
)
693 const char *username
= cli_credentials_get_username(cred
);
695 /* Yes, it is deliberate that we die if we have a NULL pointer
696 * here - anonymous is "", not NULL, which is 'never specified,
697 * never guessed', ie programmer bug */