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"
24 #include "lib/ldb/include/ldb.h"
25 #include "../lib/util/util_ldb.h"
26 #include "auth/auth.h"
27 #include "../libcli/auth/ntlm_check.h"
28 #include "auth/ntlm/auth_proto.h"
29 #include "auth/auth_sam.h"
30 #include "dsdb/samdb/samdb.h"
31 #include "dsdb/common/util.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 struct ldb_dn *domain_dn,
44 struct ldb_message **ret_msg)
48 /* pull the user attributes */
49 ret = dsdb_search_one(sam_ctx, mem_ctx, ret_msg, domain_dn, LDB_SCOPE_SUBTREE,
51 DSDB_SEARCH_SHOW_EXTENDED_DN,
52 "(&(sAMAccountName=%s)(objectclass=user))",
53 ldb_binary_encode_string(mem_ctx, account_name));
54 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
55 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb, under %s\n",
56 account_name, ldb_dn_get_linearized(domain_dn)));
57 return NT_STATUS_NO_SUCH_USER;
59 if (ret != LDB_SUCCESS) {
60 return NT_STATUS_INTERNAL_DB_CORRUPTION;
66 /****************************************************************************
67 Do a specific test for an smb password being correct, given a smb_password and
68 the lanman and NT responses.
69 ****************************************************************************/
70 static NTSTATUS authsam_password_ok(struct auth_context *auth_context,
73 const struct samr_Password *lm_pwd,
74 const struct samr_Password *nt_pwd,
75 const struct auth_usersupplied_info *user_info,
76 DATA_BLOB *user_sess_key,
77 DATA_BLOB *lm_sess_key)
81 switch (user_info->password_state) {
82 case AUTH_PASSWORD_PLAIN:
84 const struct auth_usersupplied_info *user_info_temp;
85 status = encrypt_user_info(mem_ctx, auth_context,
87 user_info, &user_info_temp);
88 if (!NT_STATUS_IS_OK(status)) {
89 DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status)));
92 user_info = user_info_temp;
96 case AUTH_PASSWORD_HASH:
97 *lm_sess_key = data_blob(NULL, 0);
98 *user_sess_key = data_blob(NULL, 0);
99 status = hash_password_check(mem_ctx,
100 lp_lanman_auth(auth_context->lp_ctx),
101 user_info->password.hash.lanman,
102 user_info->password.hash.nt,
103 user_info->mapped.account_name,
105 NT_STATUS_NOT_OK_RETURN(status);
108 case AUTH_PASSWORD_RESPONSE:
109 status = ntlm_password_check(mem_ctx,
110 lp_lanman_auth(auth_context->lp_ctx),
111 lp_ntlm_auth(auth_context->lp_ctx),
112 user_info->logon_parameters,
113 &auth_context->challenge.data,
114 &user_info->password.response.lanman,
115 &user_info->password.response.nt,
116 user_info->mapped.account_name,
117 user_info->client.account_name,
118 user_info->client.domain_name,
120 user_sess_key, lm_sess_key);
121 NT_STATUS_NOT_OK_RETURN(status);
125 if (user_sess_key && user_sess_key->data) {
126 talloc_steal(auth_context, user_sess_key->data);
128 if (lm_sess_key && lm_sess_key->data) {
129 talloc_steal(auth_context, lm_sess_key->data);
137 static NTSTATUS authsam_authenticate(struct auth_context *auth_context,
138 TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
139 struct ldb_dn *domain_dn,
140 struct ldb_message *msg,
141 const struct auth_usersupplied_info *user_info,
142 DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key)
144 struct samr_Password *lm_pwd, *nt_pwd;
147 uint16_t acct_flags = samdb_result_acct_flags(auth_context->sam_ctx, mem_ctx, msg, domain_dn);
149 /* Quit if the account was locked out. */
150 if (acct_flags & ACB_AUTOLOCK) {
151 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n",
152 user_info->mapped.account_name));
153 return NT_STATUS_ACCOUNT_LOCKED_OUT;
156 /* You can only do an interactive login to normal accounts */
157 if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
158 if (!(acct_flags & ACB_NORMAL)) {
159 return NT_STATUS_NO_SUCH_USER;
163 nt_status = samdb_result_passwords(mem_ctx, auth_context->lp_ctx, msg, &lm_pwd, &nt_pwd);
164 NT_STATUS_NOT_OK_RETURN(nt_status);
166 nt_status = authsam_password_ok(auth_context, mem_ctx,
167 acct_flags, lm_pwd, nt_pwd,
168 user_info, user_sess_key, lm_sess_key);
169 NT_STATUS_NOT_OK_RETURN(nt_status);
171 nt_status = authsam_account_ok(mem_ctx, auth_context->sam_ctx,
172 user_info->logon_parameters,
175 user_info->workstation_name,
176 user_info->mapped.account_name,
184 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
186 const struct auth_usersupplied_info *user_info,
187 struct auth_serversupplied_info **server_info)
190 const char *account_name = user_info->mapped.account_name;
191 struct ldb_message *msg;
192 struct ldb_dn *domain_dn;
193 DATA_BLOB user_sess_key, lm_sess_key;
196 if (ctx->auth_ctx->sam_ctx == NULL) {
197 DEBUG(0, ("No SAM available, cannot log in users\n"));
198 return NT_STATUS_INVALID_SYSTEM_SERVICE;
201 if (!account_name || !*account_name) {
203 return NT_STATUS_NOT_IMPLEMENTED;
206 tmp_ctx = talloc_new(mem_ctx);
208 return NT_STATUS_NO_MEMORY;
211 domain_dn = ldb_get_default_basedn(ctx->auth_ctx->sam_ctx);
212 if (domain_dn == NULL) {
213 talloc_free(tmp_ctx);
214 return NT_STATUS_NO_SUCH_DOMAIN;
217 nt_status = authsam_search_account(tmp_ctx, ctx->auth_ctx->sam_ctx, account_name, domain_dn, &msg);
218 if (!NT_STATUS_IS_OK(nt_status)) {
219 talloc_free(tmp_ctx);
223 nt_status = authsam_authenticate(ctx->auth_ctx, tmp_ctx, ctx->auth_ctx->sam_ctx, domain_dn, msg, user_info,
224 &user_sess_key, &lm_sess_key);
225 if (!NT_STATUS_IS_OK(nt_status)) {
226 talloc_free(tmp_ctx);
230 nt_status = authsam_make_server_info(tmp_ctx, ctx->auth_ctx->sam_ctx, lp_netbios_name(ctx->auth_ctx->lp_ctx),
231 lp_sam_name(ctx->auth_ctx->lp_ctx),
234 user_sess_key, lm_sess_key,
236 if (!NT_STATUS_IS_OK(nt_status)) {
237 talloc_free(tmp_ctx);
241 talloc_steal(mem_ctx, *server_info);
242 talloc_free(tmp_ctx);
247 static NTSTATUS authsam_ignoredomain_want_check(struct auth_method_context *ctx,
249 const struct auth_usersupplied_info *user_info)
251 if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
252 return NT_STATUS_NOT_IMPLEMENTED;
258 /****************************************************************************
259 Check SAM security (above) but with a few extra checks.
260 ****************************************************************************/
261 static NTSTATUS authsam_want_check(struct auth_method_context *ctx,
263 const struct auth_usersupplied_info *user_info)
265 bool is_local_name, is_my_domain;
267 if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
268 return NT_STATUS_NOT_IMPLEMENTED;
271 is_local_name = lp_is_myname(ctx->auth_ctx->lp_ctx,
272 user_info->mapped.domain_name);
273 is_my_domain = lp_is_mydomain(ctx->auth_ctx->lp_ctx,
274 user_info->mapped.domain_name);
276 /* check whether or not we service this domain/workgroup name */
277 switch (lp_server_role(ctx->auth_ctx->lp_ctx)) {
278 case ROLE_STANDALONE:
281 case ROLE_DOMAIN_MEMBER:
282 if (!is_local_name) {
283 DEBUG(6,("authsam_check_password: %s is not one of my local names (DOMAIN_MEMBER)\n",
284 user_info->mapped.domain_name));
285 return NT_STATUS_NOT_IMPLEMENTED;
289 case ROLE_DOMAIN_CONTROLLER:
290 if (!is_local_name && !is_my_domain) {
291 DEBUG(6,("authsam_check_password: %s is not one of my local names or domain name (DC)\n",
292 user_info->mapped.domain_name));
293 return NT_STATUS_NOT_IMPLEMENTED;
298 DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
299 return NT_STATUS_NOT_IMPLEMENTED;
303 /* Used in the gensec_gssapi and gensec_krb5 server-side code, where the PAC isn't available */
304 NTSTATUS authsam_get_server_info_principal(TALLOC_CTX *mem_ctx,
305 struct auth_context *auth_context,
306 const char *principal,
307 struct auth_serversupplied_info **server_info)
310 DATA_BLOB user_sess_key = data_blob(NULL, 0);
311 DATA_BLOB lm_sess_key = data_blob(NULL, 0);
313 struct ldb_message *msg;
314 struct ldb_context *sam_ctx;
315 struct ldb_dn *domain_dn;
317 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
319 return NT_STATUS_NO_MEMORY;
322 sam_ctx = samdb_connect(tmp_ctx, auth_context->event_ctx, auth_context->lp_ctx,
323 system_session(auth_context->lp_ctx));
324 if (sam_ctx == NULL) {
325 talloc_free(tmp_ctx);
326 return NT_STATUS_INVALID_SYSTEM_SERVICE;
329 nt_status = sam_get_results_principal(sam_ctx, tmp_ctx, principal,
330 user_attrs, &domain_dn, &msg);
331 if (!NT_STATUS_IS_OK(nt_status)) {
332 talloc_free(tmp_ctx);
336 nt_status = authsam_make_server_info(tmp_ctx, sam_ctx,
337 lp_netbios_name(auth_context->lp_ctx),
338 lp_workgroup(auth_context->lp_ctx),
341 user_sess_key, lm_sess_key,
343 if (!NT_STATUS_IS_OK(nt_status)) {
344 talloc_free(tmp_ctx);
348 talloc_steal(mem_ctx, *server_info);
349 talloc_free(tmp_ctx);
354 static const struct auth_operations sam_ignoredomain_ops = {
355 .name = "sam_ignoredomain",
356 .get_challenge = auth_get_challenge_not_implemented,
357 .want_check = authsam_ignoredomain_want_check,
358 .check_password = authsam_check_password_internals,
359 .get_server_info_principal = authsam_get_server_info_principal
362 static const struct auth_operations sam_ops = {
364 .get_challenge = auth_get_challenge_not_implemented,
365 .want_check = authsam_want_check,
366 .check_password = authsam_check_password_internals,
367 .get_server_info_principal = authsam_get_server_info_principal
370 _PUBLIC_ NTSTATUS auth_sam_init(void)
374 ret = auth_register(&sam_ops);
375 if (!NT_STATUS_IS_OK(ret)) {
376 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
380 ret = auth_register(&sam_ignoredomain_ops);
381 if (!NT_STATUS_IS_OK(ret)) {
382 DEBUG(0,("Failed to register 'sam_ignoredomain' auth backend!\n"));