s4: ran minimal_includes.pl on source4/auth/ntlm
[ira/wip.git] / source4 / auth / ntlm / auth_sam.c
1 /* 
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
7    
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.
12    
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.
17    
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/>.
20 */
21
22 #include "includes.h"
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 "param/param.h"
32
33 extern const char *user_attrs[];
34 extern const char *domain_ref_attrs[];
35
36 /****************************************************************************
37  Look for the specified user in the sam, return ldb result structures
38 ****************************************************************************/
39
40 static NTSTATUS authsam_search_account(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
41                                        const char *account_name,
42                                        struct ldb_dn *domain_dn,
43                                        struct ldb_message **ret_msg)
44 {
45         int ret;
46
47         /* pull the user attributes */
48         ret = gendb_search_single_extended_dn(sam_ctx, mem_ctx, domain_dn, LDB_SCOPE_SUBTREE,
49                                               ret_msg, user_attrs,
50                                               "(&(sAMAccountName=%s)(objectclass=user))", 
51                                               ldb_binary_encode_string(mem_ctx, account_name));
52         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
53                 DEBUG(3,("sam_search_user: Couldn't find user [%s] in samdb, under %s\n", 
54                          account_name, ldb_dn_get_linearized(domain_dn)));
55                 return NT_STATUS_NO_SUCH_USER;          
56         }
57         if (ret != LDB_SUCCESS) {
58                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
59         }
60         
61         return NT_STATUS_OK;
62 }
63
64 /****************************************************************************
65  Do a specific test for an smb password being correct, given a smb_password and
66  the lanman and NT responses.
67 ****************************************************************************/
68 static NTSTATUS authsam_password_ok(struct auth_context *auth_context,
69                                     TALLOC_CTX *mem_ctx,
70                                     uint16_t acct_flags,
71                                     const struct samr_Password *lm_pwd, 
72                                     const struct samr_Password *nt_pwd,
73                                     const struct auth_usersupplied_info *user_info, 
74                                     DATA_BLOB *user_sess_key, 
75                                     DATA_BLOB *lm_sess_key)
76 {
77         NTSTATUS status;
78
79         switch (user_info->password_state) {
80         case AUTH_PASSWORD_PLAIN: 
81         {
82                 const struct auth_usersupplied_info *user_info_temp;    
83                 status = encrypt_user_info(mem_ctx, auth_context, 
84                                            AUTH_PASSWORD_HASH, 
85                                            user_info, &user_info_temp);
86                 if (!NT_STATUS_IS_OK(status)) {
87                         DEBUG(1, ("Failed to convert plaintext password to password HASH: %s\n", nt_errstr(status)));
88                         return status;
89                 }
90                 user_info = user_info_temp;
91
92                 /*fall through*/
93         }
94         case AUTH_PASSWORD_HASH:
95                 *lm_sess_key = data_blob(NULL, 0);
96                 *user_sess_key = data_blob(NULL, 0);
97                 status = hash_password_check(mem_ctx, 
98                                              lp_lanman_auth(auth_context->lp_ctx),
99                                              user_info->password.hash.lanman,
100                                              user_info->password.hash.nt,
101                                              user_info->mapped.account_name,
102                                              lm_pwd, nt_pwd);
103                 NT_STATUS_NOT_OK_RETURN(status);
104                 break;
105                 
106         case AUTH_PASSWORD_RESPONSE:
107                 status = ntlm_password_check(mem_ctx, 
108                                              lp_lanman_auth(auth_context->lp_ctx),
109                                                  lp_ntlm_auth(auth_context->lp_ctx),
110                                              user_info->logon_parameters, 
111                                              &auth_context->challenge.data, 
112                                              &user_info->password.response.lanman, 
113                                              &user_info->password.response.nt,
114                                              user_info->mapped.account_name,
115                                              user_info->client.account_name, 
116                                              user_info->client.domain_name, 
117                                              lm_pwd, nt_pwd,
118                                              user_sess_key, lm_sess_key);
119                 NT_STATUS_NOT_OK_RETURN(status);
120                 break;
121         }
122
123         if (user_sess_key && user_sess_key->data) {
124                 talloc_steal(auth_context, user_sess_key->data);
125         }
126         if (lm_sess_key && lm_sess_key->data) {
127                 talloc_steal(auth_context, lm_sess_key->data);
128         }
129
130         return NT_STATUS_OK;
131 }
132
133
134
135 static NTSTATUS authsam_authenticate(struct auth_context *auth_context, 
136                                      TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx, 
137                                      struct ldb_dn *domain_dn,
138                                      struct ldb_message *msg,
139                                      const struct auth_usersupplied_info *user_info, 
140                                      DATA_BLOB *user_sess_key, DATA_BLOB *lm_sess_key) 
141 {
142         struct samr_Password *lm_pwd, *nt_pwd;
143         NTSTATUS nt_status;
144
145         uint16_t acct_flags = samdb_result_acct_flags(sam_ctx, mem_ctx, msg, domain_dn);
146         
147         /* Quit if the account was locked out. */
148         if (acct_flags & ACB_AUTOLOCK) {
149                 DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", 
150                          user_info->mapped.account_name));
151                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
152         }
153
154         /* You can only do an interactive login to normal accounts */
155         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
156                 if (!(acct_flags & ACB_NORMAL)) {
157                         return NT_STATUS_NO_SUCH_USER;
158                 }
159         }
160
161         nt_status = samdb_result_passwords(mem_ctx, auth_context->lp_ctx, msg, &lm_pwd, &nt_pwd);
162         NT_STATUS_NOT_OK_RETURN(nt_status);
163
164         nt_status = authsam_password_ok(auth_context, mem_ctx, 
165                                         acct_flags, lm_pwd, nt_pwd,
166                                         user_info, user_sess_key, lm_sess_key);
167         NT_STATUS_NOT_OK_RETURN(nt_status);
168
169         nt_status = authsam_account_ok(mem_ctx, sam_ctx, 
170                                        user_info->logon_parameters,
171                                        domain_dn,
172                                        msg,
173                                        user_info->workstation_name,
174                                        user_info->mapped.account_name,
175                                        false, false);
176
177         return nt_status;
178 }
179
180
181
182 static NTSTATUS authsam_check_password_internals(struct auth_method_context *ctx,
183                                                  TALLOC_CTX *mem_ctx,
184                                                  const struct auth_usersupplied_info *user_info, 
185                                                  struct auth_serversupplied_info **server_info)
186 {
187         NTSTATUS nt_status;
188         const char *account_name = user_info->mapped.account_name;
189         struct ldb_message *msg;
190         struct ldb_context *sam_ctx;
191         struct ldb_dn *domain_dn;
192         DATA_BLOB user_sess_key, lm_sess_key;
193         TALLOC_CTX *tmp_ctx;
194
195         if (!account_name || !*account_name) {
196                 /* 'not for me' */
197                 return NT_STATUS_NOT_IMPLEMENTED;
198         }
199
200         tmp_ctx = talloc_new(mem_ctx);
201         if (!tmp_ctx) {
202                 return NT_STATUS_NO_MEMORY;
203         }
204
205         sam_ctx = samdb_connect(tmp_ctx, ctx->auth_ctx->event_ctx, ctx->auth_ctx->lp_ctx, system_session(mem_ctx, ctx->auth_ctx->lp_ctx));
206         if (sam_ctx == NULL) {
207                 talloc_free(tmp_ctx);
208                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
209         }
210
211         domain_dn = ldb_get_default_basedn(sam_ctx);
212         if (domain_dn == NULL) {
213                 talloc_free(tmp_ctx);
214                 return NT_STATUS_NO_SUCH_DOMAIN;
215         }
216
217         nt_status = authsam_search_account(tmp_ctx, sam_ctx, account_name, domain_dn, &msg);
218         if (!NT_STATUS_IS_OK(nt_status)) {
219                 talloc_free(tmp_ctx);
220                 return nt_status;
221         }
222
223         nt_status = authsam_authenticate(ctx->auth_ctx, tmp_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);
227                 return nt_status;
228         }
229
230         nt_status = authsam_make_server_info(tmp_ctx, sam_ctx, lp_netbios_name(ctx->auth_ctx->lp_ctx), 
231                                              lp_sam_name(ctx->auth_ctx->lp_ctx),
232                                              domain_dn,
233                                              msg,
234                                              user_sess_key, lm_sess_key,
235                                              server_info);
236         if (!NT_STATUS_IS_OK(nt_status)) {
237                 talloc_free(tmp_ctx);
238                 return nt_status;
239         }
240
241         talloc_steal(mem_ctx, *server_info);
242         talloc_free(tmp_ctx);
243
244         return NT_STATUS_OK;
245 }
246
247 static NTSTATUS authsam_ignoredomain_want_check(struct auth_method_context *ctx,
248                                                 TALLOC_CTX *mem_ctx,
249                                                 const struct auth_usersupplied_info *user_info)
250 {
251         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
252                 return NT_STATUS_NOT_IMPLEMENTED;
253         }
254
255         return NT_STATUS_OK;
256 }
257
258 /****************************************************************************
259 Check SAM security (above) but with a few extra checks.
260 ****************************************************************************/
261 static NTSTATUS authsam_want_check(struct auth_method_context *ctx,
262                                    TALLOC_CTX *mem_ctx,
263                                    const struct auth_usersupplied_info *user_info)
264 {
265         bool is_local_name, is_my_domain;
266
267         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
268                 return NT_STATUS_NOT_IMPLEMENTED;
269         }
270
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); 
275
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:
279                         return NT_STATUS_OK;
280
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;
286                         }
287                         return NT_STATUS_OK;
288
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;
294                         }
295                         return NT_STATUS_OK;
296         }
297
298         DEBUG(6,("authsam_check_password: lp_server_role() has an undefined value\n"));
299         return NT_STATUS_NOT_IMPLEMENTED;
300 }
301
302                                    
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)
308 {
309         NTSTATUS nt_status;
310         DATA_BLOB user_sess_key = data_blob(NULL, 0);
311         DATA_BLOB lm_sess_key = data_blob(NULL, 0);
312
313         struct ldb_message *msg;
314         struct ldb_context *sam_ctx;
315         struct ldb_dn *domain_dn;
316         
317         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
318         if (!tmp_ctx) {
319                 return NT_STATUS_NO_MEMORY;
320         }
321
322         sam_ctx = samdb_connect(tmp_ctx, auth_context->event_ctx, auth_context->lp_ctx, 
323                                 system_session(tmp_ctx, auth_context->lp_ctx));
324         if (sam_ctx == NULL) {
325                 talloc_free(tmp_ctx);
326                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
327         }
328
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);
333                 return nt_status;
334         }
335
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),
339                                              domain_dn, 
340                                              msg,
341                                              user_sess_key, lm_sess_key,
342                                              server_info);
343         if (!NT_STATUS_IS_OK(nt_status)) {
344                 talloc_free(tmp_ctx);
345                 return nt_status;
346         }
347
348         talloc_steal(mem_ctx, *server_info);
349         talloc_free(tmp_ctx);
350
351         return NT_STATUS_OK;
352 }
353
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
360 };
361
362 static const struct auth_operations sam_ops = {
363         .name                      = "sam",
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
368 };
369
370 _PUBLIC_ NTSTATUS auth_sam_init(void)
371 {
372         NTSTATUS ret;
373
374         ret = auth_register(&sam_ops);
375         if (!NT_STATUS_IS_OK(ret)) {
376                 DEBUG(0,("Failed to register 'sam' auth backend!\n"));
377                 return ret;
378         }
379
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"));
383                 return ret;
384         }
385
386         return ret;
387 }