2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2004
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 "librpc/gen_ndr/ndr_netlogon.h"
24 #include "system/time.h"
25 #include "lib/ldb/include/ldb.h"
26 #include "util/util_ldb.h"
27 #include "auth/auth.h"
28 #include "auth/auth_sam.h"
29 #include "dsdb/samdb/samdb.h"
30 #include "libcli/security/security.h"
31 #include "libcli/ldap/ldap_ndr.h"
32 #include "param/param.h"
34 extern const char *user_attrs[];
35 extern const char *domain_ref_attrs[];
37 /****************************************************************************
38 Look for the specified user in the sam, return ldb result structures
39 ****************************************************************************/
41 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
42 const char *account_name,
43 const char *domain_name,
44 struct ldb_message ***ret_msgs,
45 struct ldb_message ***ret_msgs_domain_ref)
47 struct ldb_message **msgs_tmp;
48 struct ldb_message **msgs;
49 struct ldb_message **msgs_domain_ref;
50 struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
55 struct ldb_dn *domain_dn = NULL;
58 domain_dn = samdb_domain_to_dn(sam_ctx, mem_ctx, domain_name);
60 return NT_STATUS_INTERNAL_DB_CORRUPTION;
64 /* pull the user attributes */
65 ret = gendb_search(sam_ctx, mem_ctx, domain_dn, &msgs, user_attrs,
66 "(&(sAMAccountName=%s)(objectclass=user))",
67 ldb_binary_encode_string(mem_ctx, account_name));
69 return NT_STATUS_INTERNAL_DB_CORRUPTION;
73 DEBUG(3,("sam_search_user: Couldn't find user [%s\\%s] in samdb, under %s\n",
74 domain_name, account_name, ldb_dn_get_linearized(domain_dn)));
75 return NT_STATUS_NO_SUCH_USER;
79 DEBUG(0,("Found %d records matching user [%s]\n", ret, account_name));
80 return NT_STATUS_INTERNAL_DB_CORRUPTION;
84 struct dom_sid *domain_sid;
86 domain_sid = samdb_result_sid_prefix(mem_ctx, msgs[0], "objectSid");
88 return NT_STATUS_INTERNAL_DB_CORRUPTION;
91 /* find the domain's DN */
92 ret = gendb_search(sam_ctx, mem_ctx, NULL, &msgs_tmp, NULL,
93 "(&(objectSid=%s)(objectClass=domain))",
94 ldap_encode_ndr_dom_sid(mem_ctx, domain_sid));
96 return NT_STATUS_INTERNAL_DB_CORRUPTION;
100 DEBUG(3,("check_sam_security: Couldn't find domain_sid [%s] in passdb file.\n",
101 dom_sid_string(mem_ctx, domain_sid)));
102 return NT_STATUS_NO_SUCH_USER;
106 DEBUG(0,("Found %d records matching domain_sid [%s]\n",
107 ret, dom_sid_string(mem_ctx, domain_sid)));
108 return NT_STATUS_INTERNAL_DB_CORRUPTION;
111 domain_dn = msgs_tmp[0]->dn;
114 ret_domain = gendb_search(sam_ctx, mem_ctx, partitions_basedn, &msgs_domain_ref, domain_ref_attrs,
115 "(nCName=%s)", ldb_dn_get_linearized(domain_dn));
116 if (ret_domain == -1) {
117 return NT_STATUS_INTERNAL_DB_CORRUPTION;
120 if (ret_domain == 0) {
121 DEBUG(3,("check_sam_security: Couldn't find domain [%s] in passdb file.\n",
122 ldb_dn_get_linearized(msgs_tmp[0]->dn)));
123 return NT_STATUS_NO_SUCH_USER;
126 if (ret_domain > 1) {
127 DEBUG(0,("Found %d records matching domain [%s]\n",
128 ret_domain, ldb_dn_get_linearized(msgs_tmp[0]->dn)));
129 return NT_STATUS_INTERNAL_DB_CORRUPTION;
133 *ret_msgs_domain_ref = msgs_domain_ref;
138 /****************************************************************************
139 Do a specific test for an smb password being correct, given a smb_password and
140 the lanman and NT responses.
141 ****************************************************************************/
142 static NTSTATUS authsam_password_ok(struct auth_context *auth_context,
145 const struct samr_Password *lm_pwd,
146 const struct samr_Password *nt_pwd,
147 const struct auth_usersupplied_info *user_info,
148 DATA_BLOB *user_sess_key,
149 DATA_BLOB *lm_sess_key)
153 if (acct_flags & ACB_PWNOTREQ) {
154 if (lp_null_passwords(auth_context->lp_ctx)) {
155 DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n",
156 user_info->mapped.account_name));
159 DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n",
160 user_info->mapped.account_name));
161 return NT_STATUS_LOGON_FAILURE;
165 switch (user_info->password_state) {
166 case AUTH_PASSWORD_PLAIN:
168 const struct auth_usersupplied_info *user_info_temp;
169 status = encrypt_user_info(mem_ctx, auth_context,
171 user_info, &user_info_temp);
172 if (!NT_STATUS_IS_OK(status)) {
173 DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status)));
176 user_info = user_info_temp;
180 case AUTH_PASSWORD_HASH:
181 *lm_sess_key = data_blob(NULL, 0);
182 *user_sess_key = data_blob(NULL, 0);
183 status = hash_password_check(mem_ctx,
184 auth_context->lp_ctx,
185 user_info->password.hash.lanman,
186 user_info->password.hash.nt,
187 user_info->mapped.account_name,
189 NT_STATUS_NOT_OK_RETURN(status);
192 case AUTH_PASSWORD_RESPONSE:
193 status = ntlm_password_check(mem_ctx,
194 auth_context->lp_ctx,
195 user_info->logon_parameters,
196 &auth_context->challenge.data,
197 &user_info->password.response.lanman,
198 &user_info->password.response.nt,
199 user_info->mapped.account_name,
200 user_info->client.account_name,
201 user_info->client.domain_name,
203 user_sess_key, lm_sess_key);
204 NT_STATUS_NOT_OK_RETURN(status);
208 if (user_sess_key && user_sess_key->data) {
209 talloc_steal(auth_context, user_sess_key->data);
211 if (lm_sess_key && lm_sess_key->data) {
212 talloc_steal(auth_context, lm_sess_key->data);
220 static NTSTATUS authsam_authenticate(struct auth_context *auth_context,
221 TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
222 struct ldb_message **msgs,
223 struct ldb_message **msgs_domain_ref,
224 const struct auth_usersupplied_info *user_info,
225 DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
227 struct samr_Password *lm_pwd, *nt_pwd;
229 uint16_t acct_flags = samdb_result_acct_flags(msgs[0], "userAccountControl");
231 /* Quit if the account was locked out. */
232 if (acct_flags & ACB_AUTOLOCK) {
233 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
234 user_info->mapped.account_name));
235 return NT_STATUS_ACCOUNT_LOCKED_OUT;
238 /* You can only do an interactive login to normal accounts */
239 if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
240 if (!(acct_flags & ACB_NORMAL)) {
241 return NT_STATUS_NO_SUCH_USER;
245 nt_status = samdb_result_passwords(mem_ctx, msgs[0], &lm_pwd, &nt_pwd);
246 NT_STATUS_NOT_OK_RETURN(nt_status);
248 nt_status = authsam_password_ok(auth_context, mem_ctx,
249 acct_flags, lm_pwd, nt_pwd,
250 user_info, user_sess_key, lm_sess_key);
251 NT_STATUS_NOT_OK_RETURN(nt_status);
253 nt_status = authsam_account_ok(mem_ctx, sam_ctx,
254 user_info->logon_parameters,
257 user_info->workstation_name,
258 user_info->mapped.account_name);
265 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
268 const struct auth_usersupplied_info *user_info,
269 struct auth_serversupplied_info **server_info)
272 const char *account_name = user_info->mapped.account_name;
273 struct ldb_message **msgs;
274 struct ldb_message **domain_ref_msgs;
275 struct ldb_context *sam_ctx;
276 DATA_BLOB user_sess_key, lm_sess_key;
279 if (!account_name || !*account_name) {
281 return NT_STATUS_NOT_IMPLEMENTED;
284 tmp_ctx = talloc_new(mem_ctx);
286 return NT_STATUS_NO_MEMORY;
289 sam_ctx = samdb_connect(tmp_ctx, ctx->auth_ctx->lp_ctx, system_session(mem_ctx, ctx->auth_ctx->lp_ctx));
290 if (sam_ctx == NULL) {
291 talloc_free(tmp_ctx);
292 return NT_STATUS_INVALID_SYSTEM_SERVICE;
295 nt_status = authsam_search_account(tmp_ctx, sam_ctx, account_name, domain, &msgs, &domain_ref_msgs);
296 if (!NT_STATUS_IS_OK(nt_status)) {
297 talloc_free(tmp_ctx);
301 nt_status = authsam_authenticate(ctx->auth_ctx, tmp_ctx, sam_ctx, msgs, domain_ref_msgs, user_info,
302 &user_sess_key, &lm_sess_key);
303 if (!NT_STATUS_IS_OK(nt_status)) {
304 talloc_free(tmp_ctx);
308 nt_status = authsam_make_server_info(tmp_ctx, sam_ctx, lp_netbios_name(ctx->auth_ctx->lp_ctx),
309 msgs[0], domain_ref_msgs[0],
310 user_sess_key, lm_sess_key,
312 if (!NT_STATUS_IS_OK(nt_status)) {
313 talloc_free(tmp_ctx);
317 talloc_steal(mem_ctx, *server_info);
318 talloc_free(tmp_ctx);
323 static NTSTATUS authsam_ignoredomain_want_check(struct auth_method_context *ctx,
325 const struct auth_usersupplied_info *user_info)
327 if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
328 return NT_STATUS_NOT_IMPLEMENTED;
334 static NTSTATUS authsam_ignoredomain_check_password(struct auth_method_context *ctx,
336 const struct auth_usersupplied_info *user_info,
337 struct auth_serversupplied_info **server_info)
339 return authsam_check_password_internals(ctx, mem_ctx, NULL, user_info, server_info);
342 /****************************************************************************
343 Check SAM security (above) but with a few extra checks.
344 ****************************************************************************/
345 static NTSTATUS authsam_want_check(struct auth_method_context *ctx,
347 const struct auth_usersupplied_info *user_info)
349 bool is_local_name, is_my_domain;
351 if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
352 return NT_STATUS_NOT_IMPLEMENTED;
355 is_local_name = lp_is_myname(ctx->auth_ctx->lp_ctx,
356 user_info->mapped.domain_name);
357 is_my_domain = lp_is_mydomain(ctx->auth_ctx->lp_ctx,
358 user_info->mapped.domain_name);
360 /* check whether or not we service this domain/workgroup name */
361 switch (lp_server_role(ctx->auth_ctx->lp_ctx)) {
362 case ROLE_STANDALONE:
365 case ROLE_DOMAIN_MEMBER:
366 if (!is_local_name) {
367 DEBUG(6,("authsam_check_password: %s is not one of my local names (DOMAIN_MEMBER)\n",
368 user_info->mapped.domain_name));
369 return NT_STATUS_NOT_IMPLEMENTED;
373 case ROLE_DOMAIN_CONTROLLER:
374 if (!is_local_name && !is_my_domain) {
375 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
376 user_info->mapped.domain_name));
377 return NT_STATUS_NOT_IMPLEMENTED;
382 DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
383 return NT_STATUS_NOT_IMPLEMENTED;
386 /****************************************************************************
387 Check SAM security (above) but with a few extra checks.
388 ****************************************************************************/
389 static NTSTATUS authsam_check_password(struct auth_method_context *ctx,
391 const struct auth_usersupplied_info *user_info,
392 struct auth_serversupplied_info **server_info)
396 /* check whether or not we service this domain/workgroup name */
397 switch (lp_server_role(ctx->auth_ctx->lp_ctx)) {
398 case ROLE_STANDALONE:
399 case ROLE_DOMAIN_MEMBER:
400 domain = lp_netbios_name(ctx->auth_ctx->lp_ctx);
403 case ROLE_DOMAIN_CONTROLLER:
404 domain = lp_workgroup(ctx->auth_ctx->lp_ctx);
408 return NT_STATUS_NO_SUCH_USER;
411 return authsam_check_password_internals(ctx, mem_ctx, domain, user_info, server_info);
414 static const struct auth_operations sam_ignoredomain_ops = {
415 .name = "sam_ignoredomain",
416 .get_challenge = auth_get_challenge_not_implemented,
417 .want_check = authsam_ignoredomain_want_check,
418 .check_password = authsam_ignoredomain_check_password
421 static const struct auth_operations sam_ops = {
423 .get_challenge = auth_get_challenge_not_implemented,
424 .want_check = authsam_want_check,
425 .check_password = authsam_check_password
428 NTSTATUS auth_sam_init(void)
432 ret = auth_register(&sam_ops);
433 if (!NT_STATUS_IS_OK(ret)) {
434 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
438 ret = auth_register(&sam_ignoredomain_ops);
439 if (!NT_STATUS_IS_OK(ret)) {
440 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));