2 Unix SMB/CIFS implementation.
3 Authenticate against Samba4's auth subsystem
4 Copyright (C) Volker Lendecke 2008
5 Copyright (C) Andrew Bartlett 2010
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "source3/include/auth.h"
23 #include "source4/auth/auth.h"
24 #include "auth/auth_sam_reply.h"
25 #include "param/param.h"
26 #include "source4/lib/events/events.h"
27 #include "source4/lib/messaging/messaging.h"
28 #include "auth/gensec/gensec.h"
29 #include "auth/credentials/credentials.h"
32 #define DBGC_CLASS DBGC_AUTH
35 * This module is not an ordinary authentication module. It is really
36 * a way to redirect the whole authentication and authorization stack
37 * to use the source4 auth code, not a way to just handle NTLM
40 * See the comments above each function for how that hook changes the
45 * This hook is currently unused, as all NTLM logins go via the hooks
46 * provided by make_auth4_context_s4() below.
48 * This is only left in case we find a way that it might become useful
49 * in future. Importantly, this routine returns the information
50 * needed for a NETLOGON SamLogon, not what is needed to establish a
53 * We expect we may use this hook in the source3/ winbind when this
54 * services the AD DC. It is tested via pdbtest.
57 static NTSTATUS check_samba4_security(const struct auth_context *auth_context,
58 void *my_private_data,
60 const struct auth_usersupplied_info *user_info,
61 struct auth_serversupplied_info **server_info)
63 TALLOC_CTX *frame = talloc_stackframe();
64 struct netr_SamInfo3 *info3 = NULL;
66 struct auth_user_info_dc *user_info_dc;
67 struct auth4_context *auth4_context;
68 struct loadparm_context *lp_ctx;
70 lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers());
72 DEBUG(10, ("loadparm_init_s3 failed\n"));
74 return NT_STATUS_INVALID_SERVER_STATE;
77 /* We create a private tevent context here to avoid nested loops in
78 * the s3 one, as that may not be expected */
79 nt_status = auth_context_create(mem_ctx,
80 s4_event_context_init(frame), NULL,
83 NT_STATUS_NOT_OK_RETURN(nt_status);
85 nt_status = auth_context_set_challenge(auth4_context, auth_context->challenge.data, "auth_samba4");
86 NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
88 nt_status = auth_check_password(auth4_context, auth4_context, user_info, &user_info_dc);
89 NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
91 nt_status = auth_convert_user_info_dc_saminfo3(mem_ctx,
94 if (NT_STATUS_IS_OK(nt_status)) {
95 /* We need the strings from the server_info to be valid as long as the info3 is around */
96 talloc_steal(info3, user_info_dc);
98 talloc_free(auth4_context);
100 if (!NT_STATUS_IS_OK(nt_status)) {
104 nt_status = make_server_info_info3(mem_ctx, user_info->client.account_name,
105 user_info->mapped.domain_name, server_info,
107 if (!NT_STATUS_IS_OK(nt_status)) {
108 DEBUG(10, ("make_server_info_info3 failed: %s\n",
109 nt_errstr(nt_status)));
114 nt_status = NT_STATUS_OK;
122 * Hook to allow the source4 set of GENSEC modules to handle
123 * blob-based authentication mechanisms, without directly linking the
126 * This may eventually go away, when the GSSAPI acceptors are merged,
127 * when we will just rely on the make_auth4_context_s4 hook instead.
129 * Even for NTLMSSP, which has a common module, significant parts of
130 * the behaviour are overridden here, because it uses the source4 NTLM
131 * stack and the source4 mapping between the PAC/SamLogon response and
134 * It is important to override all this to ensure that the exact same
135 * token is generated and used in the SMB and LDAP servers, for NTLM
138 static NTSTATUS prepare_gensec(TALLOC_CTX *mem_ctx,
139 struct gensec_security **gensec_context)
142 struct loadparm_context *lp_ctx;
143 struct tevent_context *event_ctx;
144 TALLOC_CTX *frame = talloc_stackframe();
145 struct gensec_security *gensec_ctx;
146 struct imessaging_context *msg_ctx;
147 struct cli_credentials *server_credentials;
148 struct server_id *server_id;
150 lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers());
151 if (lp_ctx == NULL) {
152 DEBUG(1, ("loadparm_init_s3 failed\n"));
154 return NT_STATUS_INVALID_SERVER_STATE;
156 event_ctx = s4_event_context_init(frame);
157 if (event_ctx == NULL) {
158 DEBUG(1, ("s4_event_context_init failed\n"));
160 return NT_STATUS_INVALID_SERVER_STATE;
163 server_id = new_server_id_task(frame);
164 if (server_id == NULL) {
165 DEBUG(1, ("new_server_id_task failed\n"));
167 return NT_STATUS_INVALID_SERVER_STATE;
170 msg_ctx = imessaging_init(frame,
174 if (msg_ctx == NULL) {
175 DEBUG(1, ("imessaging_init failed\n"));
177 return NT_STATUS_INVALID_SERVER_STATE;
180 talloc_reparent(frame, msg_ctx, server_id);
183 = cli_credentials_init(frame);
184 if (!server_credentials) {
185 DEBUG(1, ("Failed to init server credentials"));
187 return NT_STATUS_INVALID_SERVER_STATE;
190 cli_credentials_set_conf(server_credentials, lp_ctx);
191 status = cli_credentials_set_machine_account(server_credentials, lp_ctx);
192 if (!NT_STATUS_IS_OK(status)) {
193 DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
194 talloc_free(server_credentials);
195 server_credentials = NULL;
198 status = samba_server_gensec_start(mem_ctx,
200 lp_ctx, server_credentials, "cifs",
202 if (!NT_STATUS_IS_OK(status)) {
203 DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
208 talloc_reparent(frame, gensec_ctx, msg_ctx);
209 talloc_reparent(frame, gensec_ctx, event_ctx);
210 talloc_reparent(frame, gensec_ctx, lp_ctx);
211 talloc_reparent(frame, gensec_ctx, server_credentials);
213 gensec_want_feature(gensec_ctx, GENSEC_FEATURE_SESSION_KEY);
214 gensec_want_feature(gensec_ctx, GENSEC_FEATURE_UNIX_TOKEN);
216 *gensec_context = gensec_ctx;
222 * Hook to allow handling of NTLM authentication for AD operation
223 * without directly linking the s4 auth stack
225 * This ensures we use the source4 authentication stack, as well as
226 * the authorization stack to create the user's token. This ensures
227 * consistency between NTLM logins and NTLMSSP logins, as NTLMSSP is
228 * handled by the hook above.
230 static NTSTATUS make_auth4_context_s4(TALLOC_CTX *mem_ctx,
231 struct auth4_context **auth4_context)
234 struct loadparm_context *lp_ctx;
235 struct tevent_context *event_ctx;
236 TALLOC_CTX *frame = talloc_stackframe();
237 struct imessaging_context *msg_ctx;
238 struct server_id *server_id;
240 lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers());
241 if (lp_ctx == NULL) {
242 DEBUG(1, ("loadparm_init_s3 failed\n"));
244 return NT_STATUS_INVALID_SERVER_STATE;
246 event_ctx = s4_event_context_init(frame);
247 if (event_ctx == NULL) {
248 DEBUG(1, ("s4_event_context_init failed\n"));
250 return NT_STATUS_INVALID_SERVER_STATE;
253 server_id = new_server_id_task(frame);
254 if (server_id == NULL) {
255 DEBUG(1, ("new_server_id_task failed\n"));
257 return NT_STATUS_INVALID_SERVER_STATE;
260 msg_ctx = imessaging_init(frame,
264 if (msg_ctx == NULL) {
265 DEBUG(1, ("imessaging_init failed\n"));
267 return NT_STATUS_INVALID_SERVER_STATE;
269 talloc_reparent(frame, msg_ctx, server_id);
271 status = auth_context_create(mem_ctx,
277 if (!NT_STATUS_IS_OK(status)) {
278 DEBUG(1, ("Failed to start auth server code: %s\n", nt_errstr(status)));
283 talloc_reparent(frame, *auth4_context, msg_ctx);
284 talloc_reparent(frame, *auth4_context, event_ctx);
285 talloc_reparent(frame, *auth4_context, lp_ctx);
291 /* module initialisation */
292 static NTSTATUS auth_init_samba4(struct auth_context *auth_context,
294 auth_methods **auth_method)
296 struct auth_methods *result;
300 result = talloc_zero(auth_context, struct auth_methods);
301 if (result == NULL) {
302 return NT_STATUS_NO_MEMORY;
304 result->name = "samba4";
305 result->auth = check_samba4_security;
306 result->prepare_gensec = prepare_gensec;
307 result->make_auth4_context = make_auth4_context_s4;
309 *auth_method = result;
313 NTSTATUS auth_samba4_init(void)
315 smb_register_auth(AUTH_INTERFACE_VERSION, "samba4",