2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2009
5 Copyright (C) Gerald Carter 2003
6 Copyright (C) Stefan Metzmacher 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 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/>.
23 #include "system/time.h"
25 #include "libcli/ldap/ldap_ndr.h"
26 #include "libcli/security/security.h"
27 #include "auth/auth.h"
28 #include "../libcli/auth/ntlm_check.h"
29 #include "auth/ntlm/auth_proto.h"
30 #include "auth/auth_sam.h"
31 #include "dsdb/samdb/samdb.h"
32 #include "dsdb/common/util.h"
33 #include "param/param.h"
34 #include "librpc/gen_ndr/ndr_irpc_c.h"
35 #include "lib/messaging/irpc.h"
37 NTSTATUS
auth_sam_init(void);
39 extern const char *user_attrs
[];
40 extern const char *domain_ref_attrs
[];
42 /****************************************************************************
43 Look for the specified user in the sam, return ldb result structures
44 ****************************************************************************/
46 static NTSTATUS
authsam_search_account(TALLOC_CTX
*mem_ctx
, struct ldb_context
*sam_ctx
,
47 const char *account_name
,
48 struct ldb_dn
*domain_dn
,
49 struct ldb_message
**ret_msg
)
53 /* pull the user attributes */
54 ret
= dsdb_search_one(sam_ctx
, mem_ctx
, ret_msg
, domain_dn
, LDB_SCOPE_SUBTREE
,
56 DSDB_SEARCH_SHOW_EXTENDED_DN
,
57 "(&(sAMAccountName=%s)(objectclass=user))",
58 ldb_binary_encode_string(mem_ctx
, account_name
));
59 if (ret
== LDB_ERR_NO_SUCH_OBJECT
) {
60 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb, under %s\n",
61 account_name
, ldb_dn_get_linearized(domain_dn
)));
62 return NT_STATUS_NO_SUCH_USER
;
64 if (ret
!= LDB_SUCCESS
) {
65 return NT_STATUS_INTERNAL_DB_CORRUPTION
;
71 /****************************************************************************
72 Do a specific test for an smb password being correct, given a smb_password and
73 the lanman and NT responses.
74 ****************************************************************************/
75 static NTSTATUS
authsam_password_ok(struct auth4_context
*auth_context
,
78 const struct samr_Password
*lm_pwd
,
79 const struct samr_Password
*nt_pwd
,
80 const struct auth_usersupplied_info
*user_info
,
81 DATA_BLOB
*user_sess_key
,
82 DATA_BLOB
*lm_sess_key
)
86 switch (user_info
->password_state
) {
87 case AUTH_PASSWORD_PLAIN
:
89 const struct auth_usersupplied_info
*user_info_temp
;
90 status
= encrypt_user_info(mem_ctx
, auth_context
,
92 user_info
, &user_info_temp
);
93 if (!NT_STATUS_IS_OK(status
)) {
94 DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status
)));
97 user_info
= user_info_temp
;
101 case AUTH_PASSWORD_HASH
:
102 *lm_sess_key
= data_blob(NULL
, 0);
103 *user_sess_key
= data_blob(NULL
, 0);
104 status
= hash_password_check(mem_ctx
,
105 lpcfg_lanman_auth(auth_context
->lp_ctx
),
106 user_info
->password
.hash
.lanman
,
107 user_info
->password
.hash
.nt
,
108 user_info
->mapped
.account_name
,
110 NT_STATUS_NOT_OK_RETURN(status
);
113 case AUTH_PASSWORD_RESPONSE
:
114 status
= ntlm_password_check(mem_ctx
,
115 lpcfg_lanman_auth(auth_context
->lp_ctx
),
116 lpcfg_ntlm_auth(auth_context
->lp_ctx
),
117 user_info
->logon_parameters
,
118 &auth_context
->challenge
.data
,
119 &user_info
->password
.response
.lanman
,
120 &user_info
->password
.response
.nt
,
121 user_info
->mapped
.account_name
,
122 user_info
->client
.account_name
,
123 user_info
->client
.domain_name
,
125 user_sess_key
, lm_sess_key
);
126 NT_STATUS_NOT_OK_RETURN(status
);
135 send a message to the drepl server telling it to initiate a
136 REPL_SECRET getncchanges extended op to fetch the users secrets
138 static void auth_sam_trigger_repl_secret(struct auth4_context
*auth_context
,
139 struct ldb_dn
*user_dn
)
141 struct dcerpc_binding_handle
*irpc_handle
;
142 struct drepl_trigger_repl_secret r
;
143 struct tevent_req
*req
;
146 tmp_ctx
= talloc_new(auth_context
);
147 if (tmp_ctx
== NULL
) {
151 irpc_handle
= irpc_binding_handle_by_name(tmp_ctx
, auth_context
->msg_ctx
,
154 if (irpc_handle
== NULL
) {
155 DEBUG(1,(__location__
": Unable to get binding handle for dreplsrv\n"));
156 TALLOC_FREE(tmp_ctx
);
160 r
.in
.user_dn
= ldb_dn_get_linearized(user_dn
);
163 * This seem to rely on the current IRPC implementation,
164 * which delivers the message in the _send function.
166 * TODO: we need a ONE_WAY IRPC handle and register
167 * a callback and wait for it to be triggered!
169 req
= dcerpc_drepl_trigger_repl_secret_r_send(tmp_ctx
,
170 auth_context
->event_ctx
,
174 /* we aren't interested in a reply */
176 TALLOC_FREE(tmp_ctx
);
180 static NTSTATUS
authsam_authenticate(struct auth4_context
*auth_context
,
181 TALLOC_CTX
*mem_ctx
, struct ldb_context
*sam_ctx
,
182 struct ldb_dn
*domain_dn
,
183 struct ldb_message
*msg
,
184 const struct auth_usersupplied_info
*user_info
,
185 DATA_BLOB
*user_sess_key
, DATA_BLOB
*lm_sess_key
)
187 struct samr_Password
*lm_pwd
, *nt_pwd
;
190 uint16_t acct_flags
= samdb_result_acct_flags(msg
, NULL
);
192 tmp_ctx
= talloc_new(mem_ctx
);
193 if (tmp_ctx
== NULL
) {
194 return NT_STATUS_NO_MEMORY
;
197 /* You can only do an interactive login to normal accounts */
198 if (user_info
->flags
& USER_INFO_INTERACTIVE_LOGON
) {
199 if (!(acct_flags
& ACB_NORMAL
)) {
200 TALLOC_FREE(tmp_ctx
);
201 return NT_STATUS_NO_SUCH_USER
;
205 nt_status
= samdb_result_passwords(tmp_ctx
, auth_context
->lp_ctx
, msg
, &lm_pwd
, &nt_pwd
);
206 if (!NT_STATUS_IS_OK(nt_status
)) {
207 TALLOC_FREE(tmp_ctx
);
211 if (lm_pwd
== NULL
&& nt_pwd
== NULL
) {
213 if (samdb_rodc(auth_context
->sam_ctx
, &am_rodc
) == LDB_SUCCESS
&& am_rodc
) {
214 /* we don't have passwords for this
215 * account. We are an RODC, and this account
216 * may be one for which we either are denied
217 * REPL_SECRET replication or we haven't yet
218 * done the replication. We return
219 * NT_STATUS_NOT_IMPLEMENTED which tells the
220 * auth code to try the next authentication
221 * mechanism. We also send a message to our
222 * drepl server to tell it to try and
223 * replicate the secrets for this account.
225 auth_sam_trigger_repl_secret(auth_context
, msg
->dn
);
226 TALLOC_FREE(tmp_ctx
);
227 return NT_STATUS_NOT_IMPLEMENTED
;
231 nt_status
= authsam_password_ok(auth_context
, tmp_ctx
,
232 acct_flags
, lm_pwd
, nt_pwd
,
233 user_info
, user_sess_key
, lm_sess_key
);
234 if (NT_STATUS_EQUAL(nt_status
, NT_STATUS_WRONG_PASSWORD
)) {
235 NTSTATUS update_bad_pwd_count_status
= authsam_update_bad_pwd_count(auth_context
->sam_ctx
, msg
, domain_dn
);
236 if (!NT_STATUS_IS_OK(update_bad_pwd_count_status
)) {
237 /* bo! (what can we do here? */
241 if (!NT_STATUS_IS_OK(nt_status
)) {
242 TALLOC_FREE(tmp_ctx
);
246 nt_status
= authsam_account_ok(tmp_ctx
, auth_context
->sam_ctx
,
247 user_info
->logon_parameters
,
250 user_info
->workstation_name
,
251 user_info
->mapped
.account_name
,
254 if (!NT_STATUS_IS_OK(nt_status
)) {
255 TALLOC_FREE(tmp_ctx
);
259 if (user_sess_key
&& user_sess_key
->data
) {
260 talloc_steal(mem_ctx
, user_sess_key
->data
);
262 if (lm_sess_key
&& lm_sess_key
->data
) {
263 talloc_steal(mem_ctx
, lm_sess_key
->data
);
266 TALLOC_FREE(tmp_ctx
);
272 static NTSTATUS
authsam_check_password_internals(struct auth_method_context
*ctx
,
274 const struct auth_usersupplied_info
*user_info
,
275 struct auth_user_info_dc
**user_info_dc
)
278 const char *account_name
= user_info
->mapped
.account_name
;
279 struct ldb_message
*msg
;
280 struct ldb_dn
*domain_dn
;
281 DATA_BLOB user_sess_key
, lm_sess_key
;
284 if (ctx
->auth_ctx
->sam_ctx
== NULL
) {
285 DEBUG(0, ("No SAM available, cannot log in users\n"));
286 return NT_STATUS_INVALID_SYSTEM_SERVICE
;
289 if (!account_name
|| !*account_name
) {
291 return NT_STATUS_NOT_IMPLEMENTED
;
294 tmp_ctx
= talloc_new(mem_ctx
);
296 return NT_STATUS_NO_MEMORY
;
299 domain_dn
= ldb_get_default_basedn(ctx
->auth_ctx
->sam_ctx
);
300 if (domain_dn
== NULL
) {
301 talloc_free(tmp_ctx
);
302 return NT_STATUS_NO_SUCH_DOMAIN
;
305 nt_status
= authsam_search_account(tmp_ctx
, ctx
->auth_ctx
->sam_ctx
, account_name
, domain_dn
, &msg
);
306 if (!NT_STATUS_IS_OK(nt_status
)) {
307 talloc_free(tmp_ctx
);
311 nt_status
= authsam_authenticate(ctx
->auth_ctx
, tmp_ctx
, ctx
->auth_ctx
->sam_ctx
, domain_dn
, msg
, user_info
,
312 &user_sess_key
, &lm_sess_key
);
313 if (!NT_STATUS_IS_OK(nt_status
)) {
314 talloc_free(tmp_ctx
);
318 nt_status
= authsam_make_user_info_dc(tmp_ctx
, ctx
->auth_ctx
->sam_ctx
, lpcfg_netbios_name(ctx
->auth_ctx
->lp_ctx
),
319 lpcfg_sam_name(ctx
->auth_ctx
->lp_ctx
),
322 user_sess_key
, lm_sess_key
,
324 if (!NT_STATUS_IS_OK(nt_status
)) {
325 talloc_free(tmp_ctx
);
329 talloc_steal(mem_ctx
, *user_info_dc
);
330 talloc_free(tmp_ctx
);
335 static NTSTATUS
authsam_ignoredomain_want_check(struct auth_method_context
*ctx
,
337 const struct auth_usersupplied_info
*user_info
)
339 if (!user_info
->mapped
.account_name
|| !*user_info
->mapped
.account_name
) {
340 return NT_STATUS_NOT_IMPLEMENTED
;
346 /****************************************************************************
347 Check SAM security (above) but with a few extra checks.
348 ****************************************************************************/
349 static NTSTATUS
authsam_want_check(struct auth_method_context
*ctx
,
351 const struct auth_usersupplied_info
*user_info
)
353 bool is_local_name
, is_my_domain
;
355 if (!user_info
->mapped
.account_name
|| !*user_info
->mapped
.account_name
) {
356 return NT_STATUS_NOT_IMPLEMENTED
;
359 is_local_name
= lpcfg_is_myname(ctx
->auth_ctx
->lp_ctx
,
360 user_info
->mapped
.domain_name
);
361 is_my_domain
= lpcfg_is_mydomain(ctx
->auth_ctx
->lp_ctx
,
362 user_info
->mapped
.domain_name
);
364 /* check whether or not we service this domain/workgroup name */
365 switch (lpcfg_server_role(ctx
->auth_ctx
->lp_ctx
)) {
366 case ROLE_STANDALONE
:
369 case ROLE_DOMAIN_MEMBER
:
370 if (!is_local_name
) {
371 DEBUG(6,("authsam_check_password: %s is not one of my local names (DOMAIN_MEMBER)\n",
372 user_info
->mapped
.domain_name
));
373 return NT_STATUS_NOT_IMPLEMENTED
;
377 case ROLE_ACTIVE_DIRECTORY_DC
:
378 if (!is_local_name
&& !is_my_domain
) {
379 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
380 user_info
->mapped
.domain_name
));
381 return NT_STATUS_NOT_IMPLEMENTED
;
386 DEBUG(6,("authsam_check_password: lpcfg_server_role() has an undefined value\n"));
387 return NT_STATUS_NOT_IMPLEMENTED
;
391 /* Wrapper for the auth subsystem pointer */
392 static NTSTATUS
authsam_get_user_info_dc_principal_wrapper(TALLOC_CTX
*mem_ctx
,
393 struct auth4_context
*auth_context
,
394 const char *principal
,
395 struct ldb_dn
*user_dn
,
396 struct auth_user_info_dc
**user_info_dc
)
398 return authsam_get_user_info_dc_principal(mem_ctx
, auth_context
->lp_ctx
, auth_context
->sam_ctx
,
399 principal
, user_dn
, user_info_dc
);
401 static const struct auth_operations sam_ignoredomain_ops
= {
402 .name
= "sam_ignoredomain",
403 .want_check
= authsam_ignoredomain_want_check
,
404 .check_password
= authsam_check_password_internals
,
405 .get_user_info_dc_principal
= authsam_get_user_info_dc_principal_wrapper
408 static const struct auth_operations sam_ops
= {
410 .want_check
= authsam_want_check
,
411 .check_password
= authsam_check_password_internals
,
412 .get_user_info_dc_principal
= authsam_get_user_info_dc_principal_wrapper
415 _PUBLIC_ NTSTATUS
auth4_sam_init(void);
416 _PUBLIC_ NTSTATUS
auth4_sam_init(void)
420 ret
= auth_register(&sam_ops
);
421 if (!NT_STATUS_IS_OK(ret
)) {
422 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
426 ret
= auth_register(&sam_ignoredomain_ops
);
427 if (!NT_STATUS_IS_OK(ret
)) {
428 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));