s4:librpc/dcerpc_smb2: make use of smbXcli_session_application_key()
[Samba/gebeck_regimport.git] / source3 / auth / auth.c
blobc3797cf6045cb7dc88c15000f8a0e5ad2f9d66ca
1 /*
2 Unix SMB/CIFS implementation.
3 Password and authentication handling
4 Copyright (C) Andrew Bartlett 2001-2002
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "includes.h"
21 #include "auth.h"
22 #include "../lib/tsocket/tsocket.h"
24 #undef DBGC_CLASS
25 #define DBGC_CLASS DBGC_AUTH
27 static_decl_auth;
29 static struct auth_init_function_entry *auth_backends = NULL;
31 static struct auth_init_function_entry *auth_find_backend_entry(const char *name);
33 NTSTATUS smb_register_auth(int version, const char *name, auth_init_function init)
35 struct auth_init_function_entry *entry = auth_backends;
37 if (version != AUTH_INTERFACE_VERSION) {
38 DEBUG(0,("Can't register auth_method!\n"
39 "You tried to register an auth module with AUTH_INTERFACE_VERSION %d, while this version of samba uses %d\n",
40 version,AUTH_INTERFACE_VERSION));
41 return NT_STATUS_OBJECT_TYPE_MISMATCH;
44 if (!name || !init) {
45 return NT_STATUS_INVALID_PARAMETER;
48 DEBUG(5,("Attempting to register auth backend %s\n", name));
50 if (auth_find_backend_entry(name)) {
51 DEBUG(0,("There already is an auth method registered with the name %s!\n", name));
52 return NT_STATUS_OBJECT_NAME_COLLISION;
55 entry = SMB_XMALLOC_P(struct auth_init_function_entry);
56 entry->name = smb_xstrdup(name);
57 entry->init = init;
59 DLIST_ADD(auth_backends, entry);
60 DEBUG(5,("Successfully added auth method '%s'\n", name));
61 return NT_STATUS_OK;
64 static struct auth_init_function_entry *auth_find_backend_entry(const char *name)
66 struct auth_init_function_entry *entry = auth_backends;
68 while(entry) {
69 if (strcmp(entry->name, name)==0) return entry;
70 entry = entry->next;
73 return NULL;
76 /****************************************************************************
77 Try to get a challenge out of the various authentication modules.
78 Returns a const char of length 8 bytes.
79 ****************************************************************************/
81 NTSTATUS auth_get_ntlm_challenge(struct auth_context *auth_context,
82 uint8_t chal[8])
84 uchar tmp[8];
87 if (auth_context->challenge.length) {
88 DEBUG(5, ("get_ntlm_challenge (auth subsystem): returning previous challenge by module %s (normal)\n",
89 auth_context->challenge_set_by));
90 memcpy(chal, auth_context->challenge.data, 8);
91 return NT_STATUS_OK;
94 generate_random_buffer(tmp, sizeof(tmp));
95 auth_context->challenge = data_blob_talloc(auth_context,
96 tmp, sizeof(tmp));
98 auth_context->challenge_set_by = "random";
100 memcpy(chal, auth_context->challenge.data, 8);
101 return NT_STATUS_OK;
106 * Check user is in correct domain (if required)
108 * @param user Only used to fill in the debug message
110 * @param domain The domain to be verified
112 * @return True if the user can connect with that domain,
113 * False otherwise.
116 static bool check_domain_match(const char *user, const char *domain)
119 * If we aren't serving to trusted domains, we must make sure that
120 * the validation request comes from an account in the same domain
121 * as the Samba server
124 if (!lp_allow_trusted_domains() &&
125 !(strequal("", domain) ||
126 strequal(lp_workgroup(), domain) ||
127 is_myname(domain))) {
128 DEBUG(1, ("check_domain_match: Attempt to connect as user %s from domain %s denied.\n", user, domain));
129 return False;
130 } else {
131 return True;
136 * Check a user's Plaintext, LM or NTLM password.
138 * Check a user's password, as given in the user_info struct and return various
139 * interesting details in the server_info struct.
141 * This function does NOT need to be in a become_root()/unbecome_root() pair
142 * as it makes the calls itself when needed.
144 * The return value takes precedence over the contents of the server_info
145 * struct. When the return is other than NT_STATUS_OK the contents
146 * of that structure is undefined.
148 * @param user_info Contains the user supplied components, including the passwords.
149 * Must be created with make_user_info() or one of its wrappers.
151 * @param auth_context Supplies the challenges and some other data.
152 * Must be created with make_auth_context(), and the challenges should be
153 * filled in, either at creation or by calling the challenge geneation
154 * function auth_get_challenge().
156 * @param server_info If successful, contains information about the authentication,
157 * including a struct samu struct describing the user.
159 * @return An NTSTATUS with NT_STATUS_OK or an appropriate error.
163 NTSTATUS auth_check_ntlm_password(const struct auth_context *auth_context,
164 const struct auth_usersupplied_info *user_info,
165 struct auth_serversupplied_info **server_info)
167 /* if all the modules say 'not for me' this is reasonable */
168 NTSTATUS nt_status = NT_STATUS_NO_SUCH_USER;
169 const char *unix_username;
170 auth_methods *auth_method;
171 TALLOC_CTX *mem_ctx;
173 if (!user_info || !auth_context || !server_info)
174 return NT_STATUS_LOGON_FAILURE;
176 DEBUG(3, ("check_ntlm_password: Checking password for unmapped user [%s]\\[%s]@[%s] with the new password interface\n",
177 user_info->client.domain_name, user_info->client.account_name, user_info->workstation_name));
179 DEBUG(3, ("check_ntlm_password: mapped user is: [%s]\\[%s]@[%s]\n",
180 user_info->mapped.domain_name, user_info->mapped.account_name, user_info->workstation_name));
182 if (auth_context->challenge.length != 8) {
183 DEBUG(0, ("check_ntlm_password: Invalid challenge stored for this auth context - cannot continue\n"));
184 return NT_STATUS_LOGON_FAILURE;
187 if (auth_context->challenge_set_by)
188 DEBUG(10, ("check_ntlm_password: auth_context challenge created by %s\n",
189 auth_context->challenge_set_by));
191 DEBUG(10, ("challenge is: \n"));
192 dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
194 #ifdef DEBUG_PASSWORD
195 DEBUG(100, ("user_info has passwords of length %d and %d\n",
196 (int)user_info->password.response.lanman.length, (int)user_info->password.response.nt.length));
197 DEBUG(100, ("lm:\n"));
198 dump_data(100, user_info->password.response.lanman.data, user_info->password.response.lanman.length);
199 DEBUG(100, ("nt:\n"));
200 dump_data(100, user_info->password.response.nt.data, user_info->password.response.nt.length);
201 #endif
203 /* This needs to be sorted: If it doesn't match, what should we do? */
204 if (!check_domain_match(user_info->client.account_name, user_info->mapped.domain_name))
205 return NT_STATUS_LOGON_FAILURE;
207 for (auth_method = auth_context->auth_method_list;auth_method; auth_method = auth_method->next) {
208 NTSTATUS result;
210 mem_ctx = talloc_init("%s authentication for user %s\\%s", auth_method->name,
211 user_info->mapped.domain_name, user_info->client.account_name);
213 result = auth_method->auth(auth_context, auth_method->private_data, mem_ctx, user_info, server_info);
215 /* check if the module did anything */
216 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_NOT_IMPLEMENTED) ) {
217 DEBUG(10,("check_ntlm_password: %s had nothing to say\n", auth_method->name));
218 talloc_destroy(mem_ctx);
219 continue;
222 nt_status = result;
224 if (NT_STATUS_IS_OK(nt_status)) {
225 DEBUG(3, ("check_ntlm_password: %s authentication for user [%s] succeeded\n",
226 auth_method->name, user_info->client.account_name));
227 } else {
228 DEBUG(5, ("check_ntlm_password: %s authentication for user [%s] FAILED with error %s\n",
229 auth_method->name, user_info->client.account_name, nt_errstr(nt_status)));
232 talloc_destroy(mem_ctx);
234 if ( NT_STATUS_IS_OK(nt_status))
236 break;
240 /* successful authentication */
242 if (NT_STATUS_IS_OK(nt_status)) {
243 unix_username = (*server_info)->unix_name;
244 if (!(*server_info)->guest) {
245 const char *rhost;
247 if (tsocket_address_is_inet(user_info->remote_host, "ip")) {
248 rhost = tsocket_address_inet_addr_string(user_info->remote_host,
249 talloc_tos());
250 if (rhost == NULL) {
251 return NT_STATUS_NO_MEMORY;
253 } else {
254 rhost = "127.0.0.1";
257 /* We might not be root if we are an RPC call */
258 become_root();
259 nt_status = smb_pam_accountcheck(unix_username,
260 rhost);
261 unbecome_root();
263 if (NT_STATUS_IS_OK(nt_status)) {
264 DEBUG(5, ("check_ntlm_password: PAM Account for user [%s] succeeded\n",
265 unix_username));
266 } else {
267 DEBUG(3, ("check_ntlm_password: PAM Account for user [%s] FAILED with error %s\n",
268 unix_username, nt_errstr(nt_status)));
272 if (NT_STATUS_IS_OK(nt_status)) {
273 DEBUG((*server_info)->guest ? 5 : 2,
274 ("check_ntlm_password: %sauthentication for user [%s] -> [%s] -> [%s] succeeded\n",
275 (*server_info)->guest ? "guest " : "",
276 user_info->client.account_name,
277 user_info->mapped.account_name,
278 unix_username));
281 return nt_status;
284 /* failed authentication; check for guest lapping */
286 DEBUG(2, ("check_ntlm_password: Authentication for user [%s] -> [%s] FAILED with error %s\n",
287 user_info->client.account_name, user_info->mapped.account_name,
288 nt_errstr(nt_status)));
289 ZERO_STRUCTP(server_info);
291 return nt_status;
294 /***************************************************************************
295 Clear out a auth_context, and destroy the attached TALLOC_CTX
296 ***************************************************************************/
298 static int auth_context_destructor(void *ptr)
300 struct auth_context *ctx = talloc_get_type(ptr, struct auth_context);
301 struct auth_methods *am;
304 /* Free private data of context's authentication methods */
305 for (am = ctx->auth_method_list; am; am = am->next) {
306 TALLOC_FREE(am->private_data);
309 return 0;
312 /***************************************************************************
313 Make a auth_info struct
314 ***************************************************************************/
316 static NTSTATUS make_auth_context(TALLOC_CTX *mem_ctx,
317 struct auth_context **auth_context)
319 struct auth_context *ctx;
321 ctx = talloc_zero(mem_ctx, struct auth_context);
322 if (!ctx) {
323 DEBUG(0,("make_auth_context: talloc failed!\n"));
324 return NT_STATUS_NO_MEMORY;
327 talloc_set_destructor((TALLOC_CTX *)ctx, auth_context_destructor);
329 *auth_context = ctx;
330 return NT_STATUS_OK;
333 bool load_auth_module(struct auth_context *auth_context,
334 const char *module, auth_methods **ret)
336 static bool initialised_static_modules = False;
338 struct auth_init_function_entry *entry;
339 char *module_name = smb_xstrdup(module);
340 char *module_params = NULL;
341 char *p;
342 bool good = False;
344 /* Initialise static modules if not done so yet */
345 if(!initialised_static_modules) {
346 static_init_auth;
347 initialised_static_modules = True;
350 DEBUG(5,("load_auth_module: Attempting to find an auth method to match %s\n",
351 module));
353 p = strchr(module_name, ':');
354 if (p) {
355 *p = 0;
356 module_params = p+1;
357 trim_char(module_params, ' ', ' ');
360 trim_char(module_name, ' ', ' ');
362 entry = auth_find_backend_entry(module_name);
364 if (entry == NULL) {
365 if (NT_STATUS_IS_OK(smb_probe_module("auth", module_name))) {
366 entry = auth_find_backend_entry(module_name);
370 if (entry != NULL) {
371 if (!NT_STATUS_IS_OK(entry->init(auth_context, module_params, ret))) {
372 DEBUG(0,("load_auth_module: auth method %s did not correctly init\n",
373 module_name));
374 } else {
375 DEBUG(5,("load_auth_module: auth method %s has a valid init\n",
376 module_name));
377 good = True;
379 } else {
380 DEBUG(0,("load_auth_module: can't find auth method %s!\n", module_name));
383 SAFE_FREE(module_name);
384 return good;
387 /***************************************************************************
388 Make a auth_info struct for the auth subsystem
389 ***************************************************************************/
391 static NTSTATUS make_auth_context_text_list(TALLOC_CTX *mem_ctx,
392 struct auth_context **auth_context,
393 char **text_list)
395 auth_methods *list = NULL;
396 auth_methods *t, *method = NULL;
397 NTSTATUS nt_status;
399 if (!text_list) {
400 DEBUG(2,("make_auth_context_text_list: No auth method list!?\n"));
401 return NT_STATUS_UNSUCCESSFUL;
404 nt_status = make_auth_context(mem_ctx, auth_context);
406 if (!NT_STATUS_IS_OK(nt_status)) {
407 return nt_status;
410 for (;*text_list; text_list++) {
411 if (load_auth_module(*auth_context, *text_list, &t)) {
412 DLIST_ADD_END(list, t, auth_methods *);
416 (*auth_context)->auth_method_list = list;
418 /* Look for the first module to provide a prepare_gensec and
419 * make_auth4_context hook, and set that if provided */
420 for (method = (*auth_context)->auth_method_list; method; method = method->next) {
421 if (method->prepare_gensec && method->make_auth4_context) {
422 (*auth_context)->prepare_gensec = method->prepare_gensec;
423 (*auth_context)->make_auth4_context = method->make_auth4_context;
424 break;
427 return NT_STATUS_OK;
430 /***************************************************************************
431 Make a auth_context struct for the auth subsystem
432 ***************************************************************************/
434 NTSTATUS make_auth_context_subsystem(TALLOC_CTX *mem_ctx,
435 struct auth_context **auth_context)
437 char **auth_method_list = NULL;
438 NTSTATUS nt_status;
440 if (lp_auth_methods()
441 && !(auth_method_list = str_list_copy(talloc_tos(),
442 lp_auth_methods()))) {
443 return NT_STATUS_NO_MEMORY;
446 if (auth_method_list == NULL) {
447 switch (lp_server_role())
449 case ROLE_DOMAIN_MEMBER:
450 DEBUG(5,("Making default auth method list for server role = 'domain member'\n"));
451 auth_method_list = str_list_make_v3(
452 talloc_tos(), "guest sam winbind:ntdomain",
453 NULL);
454 break;
455 case ROLE_DOMAIN_BDC:
456 case ROLE_DOMAIN_PDC:
457 DEBUG(5,("Making default auth method list for DC\n"));
458 auth_method_list = str_list_make_v3(
459 talloc_tos(),
460 "guest sam winbind:trustdomain",
461 NULL);
462 break;
463 case ROLE_STANDALONE:
464 DEBUG(5,("Making default auth method list for server role = 'standalone server', encrypt passwords = yes\n"));
465 if (lp_encrypted_passwords()) {
466 auth_method_list = str_list_make_v3(
467 talloc_tos(), "guest sam",
468 NULL);
469 } else {
470 DEBUG(5,("Making default auth method list for server role = 'standalone server', encrypt passwords = no\n"));
471 auth_method_list = str_list_make_v3(
472 talloc_tos(), "guest unix", NULL);
474 break;
475 case ROLE_ACTIVE_DIRECTORY_DC:
476 DEBUG(5,("Making default auth method list for server role = 'active directory domain controller'\n"));
477 auth_method_list = str_list_make_v3(
478 talloc_tos(),
479 "samba4",
480 NULL);
481 break;
482 default:
483 DEBUG(5,("Unknown auth method!\n"));
484 return NT_STATUS_UNSUCCESSFUL;
486 } else {
487 DEBUG(5,("Using specified auth order\n"));
490 nt_status = make_auth_context_text_list(mem_ctx, auth_context,
491 auth_method_list);
493 TALLOC_FREE(auth_method_list);
494 return nt_status;
497 /***************************************************************************
498 Make a auth_info struct with a fixed challenge
499 ***************************************************************************/
501 NTSTATUS make_auth_context_fixed(TALLOC_CTX *mem_ctx,
502 struct auth_context **auth_context,
503 uchar chal[8])
505 NTSTATUS nt_status;
506 nt_status = make_auth_context_subsystem(mem_ctx, auth_context);
507 if (!NT_STATUS_IS_OK(nt_status)) {
508 return nt_status;
511 (*auth_context)->challenge = data_blob_talloc(*auth_context, chal, 8);
512 (*auth_context)->challenge_set_by = "fixed";
513 return nt_status;