2 Unix SMB/Netbios implementation.
4 handle GENSEC authentication, server side
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Andrew Bartlett 2001-2003,2011
8 Copyright (C) Simo Sorce 2010.
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.
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.
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/>.
26 #include "../lib/tsocket/tsocket.h"
27 #include "auth/gensec/gensec.h"
28 #include "lib/param/param.h"
30 #include "auth/kerberos/pac_utils.h"
32 #include "librpc/crypto/gse.h"
33 #include "auth/credentials/credentials.h"
35 static NTSTATUS auth3_generate_session_info_pac(struct auth4_context *auth_ctx,
37 struct smb_krb5_context *smb_krb5_context,
39 const char *princ_name,
40 const struct tsocket_address *remote_address,
41 uint32_t session_info_flags,
42 struct auth_session_info **session_info)
45 struct PAC_LOGON_INFO *logon_info = NULL;
56 tmp_ctx = talloc_new(mem_ctx);
58 return NT_STATUS_NO_MEMORY;
63 status = kerberos_pac_logon_info(tmp_ctx, *pac_blob, NULL, NULL,
64 NULL, NULL, 0, &logon_info);
66 status = NT_STATUS_ACCESS_DENIED;
68 if (!NT_STATUS_IS_OK(status)) {
73 rc = get_remote_hostname(remote_address,
77 status = NT_STATUS_NO_MEMORY;
80 if (strequal(rhost, "UNKNOWN")) {
81 rhost = tsocket_address_inet_addr_string(remote_address,
84 status = NT_STATUS_NO_MEMORY;
89 status = get_user_from_kerberos_info(tmp_ctx, rhost,
90 princ_name, logon_info,
91 &is_mapped, &is_guest,
94 if (!NT_STATUS_IS_OK(status)) {
95 DEBUG(1, ("Failed to map kerberos principal to system user "
96 "(%s)\n", nt_errstr(status)));
97 status = NT_STATUS_ACCESS_DENIED;
101 /* save the PAC data if we have it */
103 netsamlogon_cache_store(ntuser, &logon_info->info3);
106 /* setup the string used by %U */
107 sub_set_smb_name(username);
109 /* reload services so that the new %U is taken into account */
110 lp_load(get_dyn_CONFIGFILE(), false, false, true, true);
112 status = make_session_info_krb5(mem_ctx,
113 ntuser, ntdomain, username, pw,
114 logon_info, is_guest, is_mapped, NULL /* No session key for now, caller will sort it out */,
116 if (!NT_STATUS_IS_OK(status)) {
117 DEBUG(1, ("Failed to map kerberos pac to server info (%s)\n",
119 status = NT_STATUS_ACCESS_DENIED;
123 DEBUG(5, (__location__ "OK: user: %s domain: %s client: %s\n",
124 ntuser, ntdomain, rhost));
126 status = NT_STATUS_OK;
129 TALLOC_FREE(tmp_ctx);
133 static struct auth4_context *make_auth4_context_s3(TALLOC_CTX *mem_ctx, struct auth_context *auth_context)
135 struct auth4_context *auth4_context = talloc_zero(mem_ctx, struct auth4_context);
136 if (auth4_context == NULL) {
137 DEBUG(10, ("failed to allocate auth4_context failed\n"));
140 auth4_context->generate_session_info_pac = auth3_generate_session_info_pac;
141 auth4_context->generate_session_info = auth3_generate_session_info;
142 auth4_context->get_ntlm_challenge = auth3_get_challenge;
143 auth4_context->set_ntlm_challenge = auth3_set_challenge;
144 auth4_context->check_ntlm_password = auth3_check_password;
145 auth4_context->private_data = talloc_steal(auth4_context, auth_context);
146 return auth4_context;
149 NTSTATUS make_auth4_context(TALLOC_CTX *mem_ctx, struct auth4_context **auth4_context_out)
151 struct auth_context *auth_context;
154 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
155 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
157 nt_status = make_auth_context_subsystem(tmp_ctx, &auth_context);
158 if (!NT_STATUS_IS_OK(nt_status)) {
159 TALLOC_FREE(tmp_ctx);
163 if (auth_context->make_auth4_context) {
164 nt_status = auth_context->make_auth4_context(mem_ctx, auth4_context_out);
165 TALLOC_FREE(tmp_ctx);
169 struct auth4_context *auth4_context = make_auth4_context_s3(tmp_ctx, auth_context);
170 if (auth4_context == NULL) {
171 TALLOC_FREE(tmp_ctx);
172 return NT_STATUS_NO_MEMORY;
174 *auth4_context_out = talloc_steal(mem_ctx, auth4_context);
175 TALLOC_FREE(tmp_ctx);
180 NTSTATUS auth_generic_prepare(TALLOC_CTX *mem_ctx,
181 const struct tsocket_address *remote_address,
182 struct gensec_security **gensec_security_out)
184 struct gensec_security *gensec_security;
185 struct auth_context *auth_context;
188 TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
189 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
191 nt_status = make_auth_context_subsystem(tmp_ctx, &auth_context);
192 if (!NT_STATUS_IS_OK(nt_status)) {
193 TALLOC_FREE(tmp_ctx);
197 if (auth_context->prepare_gensec) {
198 nt_status = auth_context->prepare_gensec(tmp_ctx,
200 if (!NT_STATUS_IS_OK(nt_status)) {
201 TALLOC_FREE(tmp_ctx);
205 struct gensec_settings *gensec_settings;
206 struct loadparm_context *lp_ctx;
208 struct cli_credentials *server_credentials;
209 const char *dns_name;
210 const char *dns_domain;
211 struct auth4_context *auth4_context = make_auth4_context_s3(tmp_ctx, auth_context);
212 if (auth4_context == NULL) {
213 TALLOC_FREE(tmp_ctx);
214 return NT_STATUS_NO_MEMORY;
217 lp_ctx = loadparm_init_s3(tmp_ctx, loadparm_s3_helpers());
218 if (lp_ctx == NULL) {
219 DEBUG(10, ("loadparm_init_s3 failed\n"));
220 TALLOC_FREE(tmp_ctx);
221 return NT_STATUS_INVALID_SERVER_STATE;
224 gensec_settings = lpcfg_gensec_settings(tmp_ctx, lp_ctx);
225 if (lp_ctx == NULL) {
226 DEBUG(10, ("lpcfg_gensec_settings failed\n"));
227 TALLOC_FREE(tmp_ctx);
228 return NT_STATUS_NO_MEMORY;
232 * This should be a 'netbios domain -> DNS domain'
233 * mapping, and can currently validly return NULL on
234 * poorly configured systems.
236 * This is used for the NTLMSSP server
239 dns_name = get_mydnsfullname();
240 if (dns_name == NULL) {
244 dns_domain = get_mydnsdomname(tmp_ctx);
245 if (dns_domain == NULL) {
249 gensec_settings->server_dns_name = strlower_talloc(gensec_settings, dns_name);
250 if (gensec_settings->server_dns_name == NULL) {
251 TALLOC_FREE(tmp_ctx);
252 return NT_STATUS_NO_MEMORY;
255 gensec_settings->server_dns_domain = strlower_talloc(gensec_settings, dns_domain);
256 if (gensec_settings->server_dns_domain == NULL) {
257 TALLOC_FREE(tmp_ctx);
258 return NT_STATUS_NO_MEMORY;
261 gensec_settings->backends = talloc_zero_array(gensec_settings,
262 struct gensec_security_ops *, 4);
263 if (gensec_settings->backends == NULL) {
264 TALLOC_FREE(tmp_ctx);
265 return NT_STATUS_NO_MEMORY;
270 /* These need to be in priority order, krb5 before NTLMSSP */
271 #if defined(HAVE_KRB5)
272 gensec_settings->backends[idx++] = &gensec_gse_krb5_security_ops;
275 gensec_settings->backends[idx++] = gensec_security_by_oid(NULL, GENSEC_OID_NTLMSSP);
277 gensec_settings->backends[idx++] = gensec_security_by_oid(NULL,
281 * This is anonymous for now, because we just use it
282 * to set the kerberos state at the moment
284 server_credentials = cli_credentials_init_anon(tmp_ctx);
285 if (!server_credentials) {
286 DEBUG(0, ("auth_generic_prepare: Failed to init server credentials\n"));
287 return NT_STATUS_NO_MEMORY;
290 cli_credentials_set_conf(server_credentials, lp_ctx);
292 if (lp_security() == SEC_ADS || USE_KERBEROS_KEYTAB) {
293 cli_credentials_set_kerberos_state(server_credentials, CRED_AUTO_USE_KERBEROS);
295 cli_credentials_set_kerberos_state(server_credentials, CRED_DONT_USE_KERBEROS);
298 nt_status = gensec_server_start(tmp_ctx, gensec_settings,
299 auth4_context, &gensec_security);
301 if (!NT_STATUS_IS_OK(nt_status)) {
302 TALLOC_FREE(tmp_ctx);
306 gensec_set_credentials(gensec_security, server_credentials);
308 talloc_unlink(tmp_ctx, lp_ctx);
309 talloc_unlink(tmp_ctx, server_credentials);
310 talloc_unlink(tmp_ctx, gensec_settings);
311 talloc_unlink(tmp_ctx, auth4_context);
314 nt_status = gensec_set_remote_address(gensec_security,
316 if (!NT_STATUS_IS_OK(nt_status)) {
317 TALLOC_FREE(tmp_ctx);
321 *gensec_security_out = talloc_steal(mem_ctx, gensec_security);
322 TALLOC_FREE(tmp_ctx);
326 NTSTATUS auth_check_password_session_info(struct auth4_context *auth_context,
328 struct auth_usersupplied_info *user_info,
329 struct auth_session_info **session_info)
334 nt_status = auth_context->check_ntlm_password(auth_context,
337 &server_info, NULL, NULL);
339 if (NT_STATUS_IS_OK(nt_status)) {
340 nt_status = auth_context->generate_session_info(auth_context,
343 user_info->client.account_name,
344 AUTH_SESSION_INFO_UNIX_TOKEN |
345 AUTH_SESSION_INFO_DEFAULT_GROUPS,
347 TALLOC_FREE(server_info);