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tests: also test v6 for async dns test by using dig
[Samba.git] / source3 / auth / auth_generic.c
blobe62585e919c8f5adce892b185b3ebe4e25b9b55c
1 /*
2 Unix SMB/Netbios implementation.
3 Version 3.0
4 handle GENSEC authentication, server side
5
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Andrew Bartlett 2001-2003,2011
8 Copyright (C) Simo Sorce 2010.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25 #include <tevent.h>
26 #include "../lib/util/tevent_ntstatus.h"
27 #include "auth.h"
28 #include "../lib/tsocket/tsocket.h"
29 #include "auth/gensec/gensec.h"
30 #include "lib/param/param.h"
31 #ifdef HAVE_KRB5
32 #include "auth/kerberos/pac_utils.h"
33 #include "nsswitch/libwbclient/wbclient.h"
34 #endif
35 #include "librpc/crypto/gse.h"
36 #include "auth/credentials/credentials.h"
37 #include "lib/param/loadparm.h"
38 #include "librpc/gen_ndr/dcerpc.h"
39
40 static NTSTATUS auth3_generate_session_info_pac(struct auth4_context *auth_ctx,
41 TALLOC_CTX *mem_ctx,
42 struct smb_krb5_context *smb_krb5_context,
43 DATA_BLOB *pac_blob,
44 const char *princ_name,
45 const struct tsocket_address *remote_address,
46 uint32_t session_info_flags,
47 struct auth_session_info **session_info)
48 {
49 TALLOC_CTX *tmp_ctx;
50 struct PAC_LOGON_INFO *logon_info = NULL;
51 struct netr_SamInfo3 *info3_copy = NULL;
52 bool is_mapped;
53 bool is_guest;
54 char *ntuser;
55 char *ntdomain;
56 char *username;
57 char *rhost;
58 struct passwd *pw;
59 NTSTATUS status;
60 int rc;
61
62 tmp_ctx = talloc_new(mem_ctx);
63 if (!tmp_ctx) {
64 return NT_STATUS_NO_MEMORY;
65 }
66
67 if (pac_blob) {
68 #ifdef HAVE_KRB5
69 struct wbcAuthUserParams params = { 0 };
70 struct wbcAuthUserInfo *info = NULL;
71 struct wbcAuthErrorInfo *err = NULL;
72 wbcErr wbc_err;
73
74 /*
75 * Let winbind decode the PAC.
76 * This will also store the user
77 * data in the netsamlogon cache.
78 *
79 * We need to do this *before* we
80 * call get_user_from_kerberos_info()
81 * as that does a user lookup that
82 * expects info in the netsamlogon cache.
83 *
84 * See BUG: https://bugzilla.samba.org/show_bug.cgi?id=11259
85 */
86 params.level = WBC_AUTH_USER_LEVEL_PAC;
87 params.password.pac.data = pac_blob->data;
88 params.password.pac.length = pac_blob->length;
89
90 become_root();
91 wbc_err = wbcAuthenticateUserEx(&params, &info, &err);
92 unbecome_root();
93
94 /*
95 * As this is merely a cache prime
96 * WBC_ERR_WINBIND_NOT_AVAILABLE
97 * is not a fatal error, treat it
98 * as success.
99 */
100
101 switch (wbc_err) {
102 case WBC_ERR_WINBIND_NOT_AVAILABLE:
103 case WBC_ERR_SUCCESS:
104 break;
105 case WBC_ERR_AUTH_ERROR:
106 status = NT_STATUS(err->nt_status);
107 wbcFreeMemory(err);
108 goto done;
109 default:
110 status = NT_STATUS_LOGON_FAILURE;
111 goto done;
112 }
113
114 status = kerberos_pac_logon_info(tmp_ctx, *pac_blob, NULL, NULL,
115 NULL, NULL, 0, &logon_info);
116 #else
117 status = NT_STATUS_ACCESS_DENIED;
118 #endif
119 if (!NT_STATUS_IS_OK(status)) {
120 goto done;
121 }
122 }
123
124 rc = get_remote_hostname(remote_address,
125 &rhost,
126 tmp_ctx);
127 if (rc < 0) {
128 status = NT_STATUS_NO_MEMORY;
129 goto done;
130 }
131 if (strequal(rhost, "UNKNOWN")) {
132 rhost = tsocket_address_inet_addr_string(remote_address,
133 tmp_ctx);
134 if (rhost == NULL) {
135 status = NT_STATUS_NO_MEMORY;
136 goto done;
137 }
138 }
139
140 status = get_user_from_kerberos_info(tmp_ctx, rhost,
141 princ_name, logon_info,
142 &is_mapped, &is_guest,
143 &ntuser, &ntdomain,
144 &username, &pw);
145 if (!NT_STATUS_IS_OK(status)) {
146 DBG_NOTICE("Failed to map kerberos principal to system user "
147 "(%s)\n", nt_errstr(status));
148 status = NT_STATUS_ACCESS_DENIED;
149 goto done;
150 }
151
152 /* Get the info3 from the PAC data if we have it */
153 if (logon_info) {
154 status = create_info3_from_pac_logon_info(tmp_ctx,
155 logon_info,
156 &info3_copy);
157 if (!NT_STATUS_IS_OK(status)) {
158 goto done;
159 }
160 }
161
162 status = make_session_info_krb5(mem_ctx,
163 ntuser, ntdomain, username, pw,
164 info3_copy, is_guest, is_mapped, NULL /* No session key for now, caller will sort it out */,
165 session_info);
166 if (!NT_STATUS_IS_OK(status)) {
167 DEBUG(1, ("Failed to map kerberos pac to server info (%s)\n",
168 nt_errstr(status)));
169 status = NT_STATUS_ACCESS_DENIED;
170 goto done;
171 }
172
173 /* setup the string used by %U */
174 set_current_user_info((*session_info)->unix_info->sanitized_username,
175 (*session_info)->unix_info->unix_name,
176 (*session_info)->info->domain_name);
177
178 /* reload services so that the new %U is taken into account */
179 lp_load_with_shares(get_dyn_CONFIGFILE());
180
181 DEBUG(5, (__location__ "OK: user: %s domain: %s client: %s\n",
182 ntuser, ntdomain, rhost));
183
184 status = NT_STATUS_OK;
185
186 done:
187 TALLOC_FREE(tmp_ctx);
188 return status;
189 }
190
191 static struct auth4_context *make_auth4_context_s3(TALLOC_CTX *mem_ctx, struct auth_context *auth_context)
192 {
193 struct auth4_context *auth4_context = talloc_zero(mem_ctx, struct auth4_context);
194 if (auth4_context == NULL) {
195 DEBUG(10, ("failed to allocate auth4_context failed\n"));
196 return NULL;
197 }
198 auth4_context->generate_session_info_pac = auth3_generate_session_info_pac;
199 auth4_context->generate_session_info = auth3_generate_session_info;
200 auth4_context->get_ntlm_challenge = auth3_get_challenge;
201 auth4_context->set_ntlm_challenge = auth3_set_challenge;
202 auth4_context->check_ntlm_password_send = auth3_check_password_send;
203 auth4_context->check_ntlm_password_recv = auth3_check_password_recv;
204 auth4_context->private_data = talloc_steal(auth4_context, auth_context);
205 return auth4_context;
206 }
207
208 NTSTATUS make_auth4_context(TALLOC_CTX *mem_ctx, struct auth4_context **auth4_context_out)
209 {
210 struct auth_context *auth_context;
211 NTSTATUS nt_status;
212
213 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
214 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
215
216 nt_status = make_auth3_context_for_ntlm(tmp_ctx, &auth_context);
217 if (!NT_STATUS_IS_OK(nt_status)) {
218 TALLOC_FREE(tmp_ctx);
219 return nt_status;
220 }
221
222 if (auth_context->make_auth4_context) {
223 nt_status = auth_context->make_auth4_context(auth_context, mem_ctx, auth4_context_out);
224 TALLOC_FREE(tmp_ctx);
225 return nt_status;
226
227 } else {
228 struct auth4_context *auth4_context = make_auth4_context_s3(tmp_ctx, auth_context);
229 if (auth4_context == NULL) {
230 TALLOC_FREE(tmp_ctx);
231 return NT_STATUS_NO_MEMORY;
232 }
233 *auth4_context_out = talloc_steal(mem_ctx, auth4_context);
234 TALLOC_FREE(tmp_ctx);
235 return NT_STATUS_OK;
236 }
237 }
238
239 NTSTATUS auth_generic_prepare(TALLOC_CTX *mem_ctx,
240 const struct tsocket_address *remote_address,
241 const struct tsocket_address *local_address,
242 const char *service_description,
243 struct gensec_security **gensec_security_out)
244 {
245 struct gensec_security *gensec_security;
246 struct auth_context *auth_context;
247 NTSTATUS nt_status;
248
249 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
250 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
251
252 nt_status = make_auth3_context_for_ntlm(tmp_ctx, &auth_context);
253 if (!NT_STATUS_IS_OK(nt_status)) {
254 TALLOC_FREE(tmp_ctx);
255 return nt_status;
256 }
257
258 if (auth_context->prepare_gensec) {
259 nt_status = auth_context->prepare_gensec(auth_context, tmp_ctx,
260 &gensec_security);
261 if (!NT_STATUS_IS_OK(nt_status)) {
262 TALLOC_FREE(tmp_ctx);
263 return nt_status;
264 }
265 } else {
266 const struct gensec_security_ops **backends = NULL;
267 struct gensec_settings *gensec_settings;
268 struct loadparm_context *lp_ctx;
269 size_t idx = 0;
270 struct cli_credentials *server_credentials;
271 const char *dns_name;
272 const char *dns_domain;
273 struct auth4_context *auth4_context = make_auth4_context_s3(tmp_ctx, auth_context);
274 if (auth4_context == NULL) {
275 TALLOC_FREE(tmp_ctx);
276 return NT_STATUS_NO_MEMORY;
277 }
278
279 lp_ctx = loadparm_init_s3(tmp_ctx, loadparm_s3_helpers());
280 if (lp_ctx == NULL) {
281 DEBUG(10, ("loadparm_init_s3 failed\n"));
282 TALLOC_FREE(tmp_ctx);
283 return NT_STATUS_INVALID_SERVER_STATE;
284 }
285
286 gensec_settings = lpcfg_gensec_settings(tmp_ctx, lp_ctx);
287 if (lp_ctx == NULL) {
288 DEBUG(10, ("lpcfg_gensec_settings failed\n"));
289 TALLOC_FREE(tmp_ctx);
290 return NT_STATUS_NO_MEMORY;
291 }
292
293 /*
294 * This should be a 'netbios domain -> DNS domain'
295 * mapping, and can currently validly return NULL on
296 * poorly configured systems.
297 *
298 * This is used for the NTLMSSP server
299 *
300 */
301 dns_name = get_mydnsfullname();
302 if (dns_name == NULL) {
303 dns_name = "";
304 }
305
306 dns_domain = get_mydnsdomname(tmp_ctx);
307 if (dns_domain == NULL) {
308 dns_domain = "";
309 }
310
311 gensec_settings->server_dns_name = strlower_talloc(gensec_settings, dns_name);
312 if (gensec_settings->server_dns_name == NULL) {
313 TALLOC_FREE(tmp_ctx);
314 return NT_STATUS_NO_MEMORY;
315 }
316
317 gensec_settings->server_dns_domain = strlower_talloc(gensec_settings, dns_domain);
318 if (gensec_settings->server_dns_domain == NULL) {
319 TALLOC_FREE(tmp_ctx);
320 return NT_STATUS_NO_MEMORY;
321 }
322
323 backends = talloc_zero_array(gensec_settings,
324 const struct gensec_security_ops *, 6);
325 if (backends == NULL) {
326 TALLOC_FREE(tmp_ctx);
327 return NT_STATUS_NO_MEMORY;
328 }
329 gensec_settings->backends = backends;
330
331 gensec_init();
332
333 /* These need to be in priority order, krb5 before NTLMSSP */
334 #if defined(HAVE_KRB5)
335 backends[idx++] = &gensec_gse_krb5_security_ops;
336 #endif
337
338 backends[idx++] = gensec_security_by_oid(NULL, GENSEC_OID_NTLMSSP);
339
340 backends[idx++] = gensec_security_by_oid(NULL, GENSEC_OID_SPNEGO);
341
342 backends[idx++] = gensec_security_by_auth_type(NULL, DCERPC_AUTH_TYPE_SCHANNEL);
343
344 backends[idx++] = gensec_security_by_auth_type(NULL, DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM);
345
346 /*
347 * This is anonymous for now, because we just use it
348 * to set the kerberos state at the moment
349 */
350 server_credentials = cli_credentials_init_anon(tmp_ctx);
351 if (!server_credentials) {
352 DEBUG(0, ("auth_generic_prepare: Failed to init server credentials\n"));
353 return NT_STATUS_NO_MEMORY;
354 }
355
356 cli_credentials_set_conf(server_credentials, lp_ctx);
357
358 if (lp_security() == SEC_ADS || USE_KERBEROS_KEYTAB) {
359 cli_credentials_set_kerberos_state(server_credentials, CRED_USE_KERBEROS_DESIRED);
360 } else {
361 cli_credentials_set_kerberos_state(server_credentials, CRED_USE_KERBEROS_DISABLED);
362 }
363
364 nt_status = gensec_server_start(tmp_ctx, gensec_settings,
365 auth4_context, &gensec_security);
366
367 if (!NT_STATUS_IS_OK(nt_status)) {
368 TALLOC_FREE(tmp_ctx);
369 return nt_status;
370 }
371
372 gensec_set_credentials(gensec_security, server_credentials);
373
374 talloc_unlink(tmp_ctx, lp_ctx);
375 talloc_unlink(tmp_ctx, server_credentials);
376 talloc_unlink(tmp_ctx, gensec_settings);
377 talloc_unlink(tmp_ctx, auth4_context);
378 }
379
380 nt_status = gensec_set_remote_address(gensec_security,
381 remote_address);
382 if (!NT_STATUS_IS_OK(nt_status)) {
383 TALLOC_FREE(tmp_ctx);
384 return nt_status;
385 }
386
387 nt_status = gensec_set_local_address(gensec_security,
388 local_address);
389 if (!NT_STATUS_IS_OK(nt_status)) {
390 TALLOC_FREE(tmp_ctx);
391 return nt_status;
392 }
393
394 nt_status = gensec_set_target_service_description(gensec_security,
395 service_description);
396
397 if (!NT_STATUS_IS_OK(nt_status)) {
398 TALLOC_FREE(tmp_ctx);
399 return nt_status;
400 }
401
402 *gensec_security_out = talloc_steal(mem_ctx, gensec_security);
403 TALLOC_FREE(tmp_ctx);
404 return NT_STATUS_OK;
405 }
406
407 /*
408 * Check a username and password, and return the final session_info.
409 * We also log the authorization of the session here, just as
410 * gensec_session_info() does.
411 */
412 NTSTATUS auth_check_password_session_info(struct auth4_context *auth_context,
413 TALLOC_CTX *mem_ctx,
414 struct auth_usersupplied_info *user_info,
415 struct auth_session_info **session_info)
416 {
417 NTSTATUS nt_status;
418 void *server_info;
419 uint8_t authoritative = 0;
420 struct tevent_context *ev = NULL;
421 struct tevent_req *subreq = NULL;
422 bool ok;
423
424 ev = samba_tevent_context_init(talloc_tos());
425 if (ev == NULL) {
426 return NT_STATUS_NO_MEMORY;
427 }
428
429 subreq = auth_context->check_ntlm_password_send(ev, ev,
430 auth_context,
431 user_info);
432 if (subreq == NULL) {
433 TALLOC_FREE(ev);
434 return NT_STATUS_NO_MEMORY;
435 }
436 ok = tevent_req_poll_ntstatus(subreq, ev, &nt_status);
437 if (!ok) {
438 TALLOC_FREE(ev);
439 return nt_status;
440 }
441 nt_status = auth_context->check_ntlm_password_recv(subreq,
442 talloc_tos(),
443 &authoritative,
444 &server_info,
445 NULL, NULL);
446 TALLOC_FREE(ev);
447 if (!NT_STATUS_IS_OK(nt_status)) {
448 return nt_status;
449 }
450
451 nt_status = auth_context->generate_session_info(auth_context,
452 mem_ctx,
453 server_info,
454 user_info->client.account_name,
455 AUTH_SESSION_INFO_UNIX_TOKEN |
456 AUTH_SESSION_INFO_DEFAULT_GROUPS |
457 AUTH_SESSION_INFO_NTLM,
458 session_info);
459 TALLOC_FREE(server_info);
460
461 if (!NT_STATUS_IS_OK(nt_status)) {
462 return nt_status;
463 }
464
465 /*
466 * This is rather redundant (the authentication has just been
467 * logged, with much the same details), but because we want to
468 * log all authorizations consistently (be they NLTM, NTLMSSP
469 * or krb5) we log this info again as an authorization.
470 */
471 log_successful_authz_event(auth_context->msg_ctx,
472 auth_context->lp_ctx,
473 user_info->remote_host,
474 user_info->local_host,
475 user_info->service_description,
476 user_info->auth_description,
477 AUTHZ_TRANSPORT_PROTECTION_SMB,
478 *session_info);
479
480 return nt_status;
481 }
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