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
);
130 if (user_sess_key
&& user_sess_key
->data
) {
131 talloc_steal(auth_context
, user_sess_key
->data
);
133 if (lm_sess_key
&& lm_sess_key
->data
) {
134 talloc_steal(auth_context
, lm_sess_key
->data
);
142 send a message to the drepl server telling it to initiate a
143 REPL_SECRET getncchanges extended op to fetch the users secrets
145 static void auth_sam_trigger_repl_secret(TALLOC_CTX
*mem_ctx
, struct auth4_context
*auth_context
,
146 struct ldb_dn
*user_dn
)
148 struct dcerpc_binding_handle
*irpc_handle
;
149 struct drepl_trigger_repl_secret r
;
150 struct tevent_req
*req
;
152 irpc_handle
= irpc_binding_handle_by_name(mem_ctx
, auth_context
->msg_ctx
,
155 if (irpc_handle
== NULL
) {
156 DEBUG(1,(__location__
": Unable to get binding handle for dreplsrv\n"));
160 r
.in
.user_dn
= ldb_dn_get_linearized(user_dn
);
162 req
= dcerpc_drepl_trigger_repl_secret_r_send(mem_ctx
,
163 auth_context
->event_ctx
,
167 /* we aren't interested in a reply */
169 talloc_free(irpc_handle
);
173 static NTSTATUS
authsam_authenticate(struct auth4_context
*auth_context
,
174 TALLOC_CTX
*mem_ctx
, struct ldb_context
*sam_ctx
,
175 struct ldb_dn
*domain_dn
,
176 struct ldb_message
*msg
,
177 const struct auth_usersupplied_info
*user_info
,
178 DATA_BLOB
*user_sess_key
, DATA_BLOB
*lm_sess_key
)
180 struct samr_Password
*lm_pwd
, *nt_pwd
;
183 uint16_t acct_flags
= samdb_result_acct_flags(auth_context
->sam_ctx
, mem_ctx
, msg
, domain_dn
);
185 /* Quit if the account was locked out. */
186 if (acct_flags
& ACB_AUTOLOCK
) {
187 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
188 user_info
->mapped
.account_name
));
189 return NT_STATUS_ACCOUNT_LOCKED_OUT
;
192 /* You can only do an interactive login to normal accounts */
193 if (user_info
->flags
& USER_INFO_INTERACTIVE_LOGON
) {
194 if (!(acct_flags
& ACB_NORMAL
)) {
195 return NT_STATUS_NO_SUCH_USER
;
199 nt_status
= samdb_result_passwords(mem_ctx
, auth_context
->lp_ctx
, msg
, &lm_pwd
, &nt_pwd
);
200 NT_STATUS_NOT_OK_RETURN(nt_status
);
202 if (lm_pwd
== NULL
&& nt_pwd
== NULL
) {
204 if (samdb_rodc(auth_context
->sam_ctx
, &am_rodc
) == LDB_SUCCESS
&& am_rodc
) {
205 /* we don't have passwords for this
206 * account. We are an RODC, and this account
207 * may be one for which we either are denied
208 * REPL_SECRET replication or we haven't yet
209 * done the replication. We return
210 * NT_STATUS_NOT_IMPLEMENTED which tells the
211 * auth code to try the next authentication
212 * mechanism. We also send a message to our
213 * drepl server to tell it to try and
214 * replicate the secrets for this account.
216 auth_sam_trigger_repl_secret(mem_ctx
, auth_context
, msg
->dn
);
217 return NT_STATUS_NOT_IMPLEMENTED
;
221 nt_status
= authsam_password_ok(auth_context
, mem_ctx
,
222 acct_flags
, lm_pwd
, nt_pwd
,
223 user_info
, user_sess_key
, lm_sess_key
);
224 NT_STATUS_NOT_OK_RETURN(nt_status
);
226 nt_status
= authsam_account_ok(mem_ctx
, auth_context
->sam_ctx
,
227 user_info
->logon_parameters
,
230 user_info
->workstation_name
,
231 user_info
->mapped
.account_name
,
239 static NTSTATUS
authsam_check_password_internals(struct auth_method_context
*ctx
,
241 const struct auth_usersupplied_info
*user_info
,
242 struct auth_user_info_dc
**user_info_dc
)
245 const char *account_name
= user_info
->mapped
.account_name
;
246 struct ldb_message
*msg
;
247 struct ldb_dn
*domain_dn
;
248 DATA_BLOB user_sess_key
, lm_sess_key
;
251 if (ctx
->auth_ctx
->sam_ctx
== NULL
) {
252 DEBUG(0, ("No SAM available, cannot log in users\n"));
253 return NT_STATUS_INVALID_SYSTEM_SERVICE
;
256 if (!account_name
|| !*account_name
) {
258 return NT_STATUS_NOT_IMPLEMENTED
;
261 tmp_ctx
= talloc_new(mem_ctx
);
263 return NT_STATUS_NO_MEMORY
;
266 domain_dn
= ldb_get_default_basedn(ctx
->auth_ctx
->sam_ctx
);
267 if (domain_dn
== NULL
) {
268 talloc_free(tmp_ctx
);
269 return NT_STATUS_NO_SUCH_DOMAIN
;
272 nt_status
= authsam_search_account(tmp_ctx
, ctx
->auth_ctx
->sam_ctx
, account_name
, domain_dn
, &msg
);
273 if (!NT_STATUS_IS_OK(nt_status
)) {
274 talloc_free(tmp_ctx
);
278 nt_status
= authsam_authenticate(ctx
->auth_ctx
, tmp_ctx
, ctx
->auth_ctx
->sam_ctx
, domain_dn
, msg
, user_info
,
279 &user_sess_key
, &lm_sess_key
);
280 if (!NT_STATUS_IS_OK(nt_status
)) {
281 talloc_free(tmp_ctx
);
285 nt_status
= authsam_make_user_info_dc(tmp_ctx
, ctx
->auth_ctx
->sam_ctx
, lpcfg_netbios_name(ctx
->auth_ctx
->lp_ctx
),
286 lpcfg_sam_name(ctx
->auth_ctx
->lp_ctx
),
289 user_sess_key
, lm_sess_key
,
291 if (!NT_STATUS_IS_OK(nt_status
)) {
292 talloc_free(tmp_ctx
);
296 talloc_steal(mem_ctx
, *user_info_dc
);
297 talloc_free(tmp_ctx
);
302 static NTSTATUS
authsam_ignoredomain_want_check(struct auth_method_context
*ctx
,
304 const struct auth_usersupplied_info
*user_info
)
306 if (!user_info
->mapped
.account_name
|| !*user_info
->mapped
.account_name
) {
307 return NT_STATUS_NOT_IMPLEMENTED
;
313 /****************************************************************************
314 Check SAM security (above) but with a few extra checks.
315 ****************************************************************************/
316 static NTSTATUS
authsam_want_check(struct auth_method_context
*ctx
,
318 const struct auth_usersupplied_info
*user_info
)
320 bool is_local_name
, is_my_domain
;
322 if (!user_info
->mapped
.account_name
|| !*user_info
->mapped
.account_name
) {
323 return NT_STATUS_NOT_IMPLEMENTED
;
326 is_local_name
= lpcfg_is_myname(ctx
->auth_ctx
->lp_ctx
,
327 user_info
->mapped
.domain_name
);
328 is_my_domain
= lpcfg_is_mydomain(ctx
->auth_ctx
->lp_ctx
,
329 user_info
->mapped
.domain_name
);
331 /* check whether or not we service this domain/workgroup name */
332 switch (lpcfg_server_role(ctx
->auth_ctx
->lp_ctx
)) {
333 case ROLE_STANDALONE
:
336 case ROLE_DOMAIN_MEMBER
:
337 if (!is_local_name
) {
338 DEBUG(6,("authsam_check_password: %s is not one of my local names (DOMAIN_MEMBER)\n",
339 user_info
->mapped
.domain_name
));
340 return NT_STATUS_NOT_IMPLEMENTED
;
344 case ROLE_ACTIVE_DIRECTORY_DC
:
345 if (!is_local_name
&& !is_my_domain
) {
346 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
347 user_info
->mapped
.domain_name
));
348 return NT_STATUS_NOT_IMPLEMENTED
;
353 DEBUG(6,("authsam_check_password: lpcfg_server_role() has an undefined value\n"));
354 return NT_STATUS_NOT_IMPLEMENTED
;
358 /* Wrapper for the auth subsystem pointer */
359 static NTSTATUS
authsam_get_user_info_dc_principal_wrapper(TALLOC_CTX
*mem_ctx
,
360 struct auth4_context
*auth_context
,
361 const char *principal
,
362 struct ldb_dn
*user_dn
,
363 struct auth_user_info_dc
**user_info_dc
)
365 return authsam_get_user_info_dc_principal(mem_ctx
, auth_context
->lp_ctx
, auth_context
->sam_ctx
,
366 principal
, user_dn
, user_info_dc
);
368 static const struct auth_operations sam_ignoredomain_ops
= {
369 .name
= "sam_ignoredomain",
370 .want_check
= authsam_ignoredomain_want_check
,
371 .check_password
= authsam_check_password_internals
,
372 .get_user_info_dc_principal
= authsam_get_user_info_dc_principal_wrapper
375 static const struct auth_operations sam_ops
= {
377 .want_check
= authsam_want_check
,
378 .check_password
= authsam_check_password_internals
,
379 .get_user_info_dc_principal
= authsam_get_user_info_dc_principal_wrapper
382 _PUBLIC_ NTSTATUS
auth4_sam_init(void)
386 ret
= auth_register(&sam_ops
);
387 if (!NT_STATUS_IS_OK(ret
)) {
388 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
392 ret
= auth_register(&sam_ignoredomain_ops
);
393 if (!NT_STATUS_IS_OK(ret
)) {
394 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));