2 Unix SMB/Netbios implementation.
4 handle NLTMSSP, server side
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Andrew Bartlett 2001-2003
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "../libcli/auth/ntlmssp.h"
26 #include "ntlmssp_wrap.h"
27 #include "../librpc/gen_ndr/netlogon.h"
28 #include "../lib/tsocket/tsocket.h"
29 #include "auth/gensec/gensec.h"
31 NTSTATUS auth_ntlmssp_steal_session_info(TALLOC_CTX *mem_ctx,
32 struct auth_ntlmssp_state *auth_ntlmssp_state,
33 struct auth_session_info **session_info)
36 if (auth_ntlmssp_state->gensec_security) {
38 nt_status = gensec_session_info(auth_ntlmssp_state->gensec_security,
44 nt_status = create_local_token(mem_ctx,
45 auth_ntlmssp_state->server_info,
46 &auth_ntlmssp_state->ntlmssp_state->session_key,
49 if (!NT_STATUS_IS_OK(nt_status)) {
50 DEBUG(10, ("create_local_token failed: %s\n",
51 nt_errstr(nt_status)));
57 * Return the challenge as determined by the authentication subsystem
58 * @return an 8 byte random challenge
61 static NTSTATUS auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state,
64 struct auth_ntlmssp_state *auth_ntlmssp_state =
65 (struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
66 auth_ntlmssp_state->auth_context->get_ntlm_challenge(
67 auth_ntlmssp_state->auth_context, chal);
72 * Some authentication methods 'fix' the challenge, so we may not be able to set it
74 * @return If the effective challenge used by the auth subsystem may be modified
76 static bool auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
78 struct auth_ntlmssp_state *auth_ntlmssp_state =
79 (struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
80 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
82 return auth_context->challenge_may_be_modified;
86 * NTLM2 authentication modifies the effective challenge,
87 * @param challenge The new challenge value
89 static NTSTATUS auth_ntlmssp_set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
91 struct auth_ntlmssp_state *auth_ntlmssp_state =
92 (struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
93 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
95 SMB_ASSERT(challenge->length == 8);
97 auth_context->challenge = data_blob_talloc(auth_context,
98 challenge->data, challenge->length);
100 auth_context->challenge_set_by = "NTLMSSP callback (NTLM2)";
102 DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
103 DEBUG(5, ("challenge is: \n"));
104 dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
109 * Check the password on an NTLMSSP login.
111 * Return the session keys used on the connection.
114 static NTSTATUS auth_ntlmssp_check_password(struct ntlmssp_state *ntlmssp_state, TALLOC_CTX *mem_ctx,
115 DATA_BLOB *session_key, DATA_BLOB *lm_session_key)
117 struct auth_ntlmssp_state *auth_ntlmssp_state =
118 (struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
119 struct auth_usersupplied_info *user_info = NULL;
121 bool username_was_mapped;
123 /* the client has given us its machine name (which we otherwise would not get on port 445).
124 we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
126 set_remote_machine_name(auth_ntlmssp_state->ntlmssp_state->client.netbios_name, True);
128 /* setup the string used by %U */
129 /* sub_set_smb_name checks for weird internally */
130 sub_set_smb_name(auth_ntlmssp_state->ntlmssp_state->user);
132 lp_load(get_dyn_CONFIGFILE(), false, false, true, true);
134 nt_status = make_user_info_map(&user_info,
135 auth_ntlmssp_state->ntlmssp_state->user,
136 auth_ntlmssp_state->ntlmssp_state->domain,
137 auth_ntlmssp_state->ntlmssp_state->client.netbios_name,
138 auth_ntlmssp_state->remote_address,
139 auth_ntlmssp_state->ntlmssp_state->lm_resp.data ? &auth_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
140 auth_ntlmssp_state->ntlmssp_state->nt_resp.data ? &auth_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
142 AUTH_PASSWORD_RESPONSE);
144 if (!NT_STATUS_IS_OK(nt_status)) {
148 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
150 nt_status = auth_ntlmssp_state->auth_context->check_ntlm_password(auth_ntlmssp_state->auth_context,
151 user_info, &auth_ntlmssp_state->server_info);
153 username_was_mapped = user_info->was_mapped;
155 free_user_info(&user_info);
157 if (!NT_STATUS_IS_OK(nt_status)) {
158 nt_status = do_map_to_guest_server_info(nt_status,
159 &auth_ntlmssp_state->server_info,
160 auth_ntlmssp_state->ntlmssp_state->user,
161 auth_ntlmssp_state->ntlmssp_state->domain);
165 auth_ntlmssp_state->server_info->nss_token |= username_was_mapped;
167 /* Clear out the session keys, and pass them to the caller.
168 * They will not be used in this form again - instead the
169 * NTLMSSP code will decide on the final correct session key,
170 * and put it back here at the end of
171 * auth_ntlmssp_steal_server_info */
172 if (auth_ntlmssp_state->server_info->session_key.length) {
173 DEBUG(10, ("Got NT session key of length %u\n",
174 (unsigned int)auth_ntlmssp_state->server_info->session_key.length));
175 *session_key = auth_ntlmssp_state->server_info->session_key;
176 talloc_steal(mem_ctx, auth_ntlmssp_state->server_info->session_key.data);
177 auth_ntlmssp_state->server_info->session_key = data_blob_null;
179 if (auth_ntlmssp_state->server_info->lm_session_key.length) {
180 DEBUG(10, ("Got LM session key of length %u\n",
181 (unsigned int)auth_ntlmssp_state->server_info->lm_session_key.length));
182 *lm_session_key = auth_ntlmssp_state->server_info->lm_session_key;
183 talloc_steal(mem_ctx, auth_ntlmssp_state->server_info->lm_session_key.data);
184 auth_ntlmssp_state->server_info->lm_session_key = data_blob_null;
189 static int auth_ntlmssp_state_destructor(void *ptr);
191 NTSTATUS auth_ntlmssp_prepare(const struct tsocket_address *remote_address,
192 struct auth_ntlmssp_state **auth_ntlmssp_state)
196 const char *netbios_name;
197 const char *netbios_domain;
198 const char *dns_name;
200 struct auth_ntlmssp_state *ans;
201 struct auth_context *auth_context;
203 ans = talloc_zero(NULL, struct auth_ntlmssp_state);
205 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
206 return NT_STATUS_NO_MEMORY;
209 nt_status = make_auth_context_subsystem(talloc_tos(), &auth_context);
210 if (!NT_STATUS_IS_OK(nt_status)) {
215 ans->auth_context = talloc_steal(ans, auth_context);
217 if (auth_context->prepare_gensec) {
218 nt_status = auth_context->prepare_gensec(ans, &ans->gensec_security);
219 if (!NT_STATUS_IS_OK(nt_status)) {
223 *auth_ntlmssp_state = ans;
228 if ((enum server_role)lp_server_role() == ROLE_STANDALONE) {
229 is_standalone = true;
231 is_standalone = false;
234 netbios_name = lp_netbios_name();
235 netbios_domain = lp_workgroup();
236 /* This should be a 'netbios domain -> DNS domain' mapping */
237 dns_domain = get_mydnsdomname(talloc_tos());
239 strlower_m(dns_domain);
241 dns_name = get_mydnsfullname();
243 ans->remote_address = tsocket_address_copy(remote_address, ans);
244 if (ans->remote_address == NULL) {
245 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
246 return NT_STATUS_NO_MEMORY;
249 nt_status = ntlmssp_server_start(ans,
255 &ans->ntlmssp_state);
256 if (!NT_STATUS_IS_OK(nt_status)) {
260 ans->ntlmssp_state->callback_private = ans;
261 ans->ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
262 ans->ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
263 ans->ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
264 ans->ntlmssp_state->check_password = auth_ntlmssp_check_password;
266 talloc_set_destructor((TALLOC_CTX *)ans, auth_ntlmssp_state_destructor);
268 *auth_ntlmssp_state = ans;
272 static int auth_ntlmssp_state_destructor(void *ptr)
274 struct auth_ntlmssp_state *ans;
276 ans = talloc_get_type(ptr, struct auth_ntlmssp_state);
278 TALLOC_FREE(ans->remote_address);
279 TALLOC_FREE(ans->server_info);
280 TALLOC_FREE(ans->ntlmssp_state);
284 NTSTATUS auth_ntlmssp_start(struct auth_ntlmssp_state *auth_ntlmssp_state)
286 if (auth_ntlmssp_state->auth_context->gensec_start_mech_by_oid) {
287 return auth_ntlmssp_state->auth_context->gensec_start_mech_by_oid(auth_ntlmssp_state->gensec_security, GENSEC_OID_NTLMSSP);