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_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,
47 auth_ntlmssp_state->ntlmssp_state->user,
50 if (!NT_STATUS_IS_OK(nt_status)) {
51 DEBUG(10, ("create_local_token failed: %s\n",
52 nt_errstr(nt_status)));
58 * Return the challenge as determined by the authentication subsystem
59 * @return an 8 byte random challenge
62 static NTSTATUS auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state,
65 struct auth_ntlmssp_state *auth_ntlmssp_state =
66 (struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
67 auth_ntlmssp_state->auth_context->get_ntlm_challenge(
68 auth_ntlmssp_state->auth_context, chal);
73 * Some authentication methods 'fix' the challenge, so we may not be able to set it
75 * @return If the effective challenge used by the auth subsystem may be modified
77 static bool auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
79 struct auth_ntlmssp_state *auth_ntlmssp_state =
80 (struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
81 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
83 return auth_context->challenge_may_be_modified;
87 * NTLM2 authentication modifies the effective challenge,
88 * @param challenge The new challenge value
90 static NTSTATUS auth_ntlmssp_set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
92 struct auth_ntlmssp_state *auth_ntlmssp_state =
93 (struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
94 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
96 SMB_ASSERT(challenge->length == 8);
98 auth_context->challenge = data_blob_talloc(auth_context,
99 challenge->data, challenge->length);
101 auth_context->challenge_set_by = "NTLMSSP callback (NTLM2)";
103 DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
104 DEBUG(5, ("challenge is: \n"));
105 dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
110 * Check the password on an NTLMSSP login.
112 * Return the session keys used on the connection.
115 static NTSTATUS auth_ntlmssp_check_password(struct ntlmssp_state *ntlmssp_state, TALLOC_CTX *mem_ctx,
116 DATA_BLOB *session_key, DATA_BLOB *lm_session_key)
118 struct auth_ntlmssp_state *auth_ntlmssp_state =
119 (struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
120 struct auth_usersupplied_info *user_info = NULL;
122 bool username_was_mapped;
124 /* the client has given us its machine name (which we otherwise would not get on port 445).
125 we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
127 set_remote_machine_name(auth_ntlmssp_state->ntlmssp_state->client.netbios_name, True);
129 /* setup the string used by %U */
130 /* sub_set_smb_name checks for weird internally */
131 sub_set_smb_name(auth_ntlmssp_state->ntlmssp_state->user);
133 lp_load(get_dyn_CONFIGFILE(), false, false, true, true);
135 nt_status = make_user_info_map(&user_info,
136 auth_ntlmssp_state->ntlmssp_state->user,
137 auth_ntlmssp_state->ntlmssp_state->domain,
138 auth_ntlmssp_state->ntlmssp_state->client.netbios_name,
139 auth_ntlmssp_state->remote_address,
140 auth_ntlmssp_state->ntlmssp_state->lm_resp.data ? &auth_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
141 auth_ntlmssp_state->ntlmssp_state->nt_resp.data ? &auth_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
143 AUTH_PASSWORD_RESPONSE);
145 if (!NT_STATUS_IS_OK(nt_status)) {
149 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
151 nt_status = auth_ntlmssp_state->auth_context->check_ntlm_password(auth_ntlmssp_state->auth_context,
152 user_info, &auth_ntlmssp_state->server_info);
154 username_was_mapped = user_info->was_mapped;
156 free_user_info(&user_info);
158 if (!NT_STATUS_IS_OK(nt_status)) {
159 nt_status = do_map_to_guest_server_info(nt_status,
160 &auth_ntlmssp_state->server_info,
161 auth_ntlmssp_state->ntlmssp_state->user,
162 auth_ntlmssp_state->ntlmssp_state->domain);
165 if (!NT_STATUS_IS_OK(nt_status)) {
169 talloc_steal(auth_ntlmssp_state, auth_ntlmssp_state->server_info);
171 auth_ntlmssp_state->server_info->nss_token |= username_was_mapped;
173 /* Clear out the session keys, and pass them to the caller.
174 * They will not be used in this form again - instead the
175 * NTLMSSP code will decide on the final correct session key,
176 * and put it back here at the end of
177 * auth_ntlmssp_steal_server_info */
178 if (auth_ntlmssp_state->server_info->session_key.length) {
179 DEBUG(10, ("Got NT session key of length %u\n",
180 (unsigned int)auth_ntlmssp_state->server_info->session_key.length));
181 *session_key = auth_ntlmssp_state->server_info->session_key;
182 talloc_steal(mem_ctx, auth_ntlmssp_state->server_info->session_key.data);
183 auth_ntlmssp_state->server_info->session_key = data_blob_null;
185 if (auth_ntlmssp_state->server_info->lm_session_key.length) {
186 DEBUG(10, ("Got LM session key of length %u\n",
187 (unsigned int)auth_ntlmssp_state->server_info->lm_session_key.length));
188 *lm_session_key = auth_ntlmssp_state->server_info->lm_session_key;
189 talloc_steal(mem_ctx, auth_ntlmssp_state->server_info->lm_session_key.data);
190 auth_ntlmssp_state->server_info->lm_session_key = data_blob_null;
195 NTSTATUS auth_ntlmssp_prepare(const struct tsocket_address *remote_address,
196 struct auth_ntlmssp_state **auth_ntlmssp_state)
200 const char *netbios_name;
201 const char *netbios_domain;
202 const char *dns_name;
204 struct auth_ntlmssp_state *ans;
205 struct auth_context *auth_context;
207 ans = talloc_zero(NULL, struct auth_ntlmssp_state);
209 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
210 return NT_STATUS_NO_MEMORY;
213 nt_status = make_auth_context_subsystem(talloc_tos(), &auth_context);
214 if (!NT_STATUS_IS_OK(nt_status)) {
219 ans->auth_context = talloc_steal(ans, auth_context);
221 if (auth_context->prepare_gensec) {
222 nt_status = auth_context->prepare_gensec(ans, &ans->gensec_security);
223 if (!NT_STATUS_IS_OK(nt_status)) {
227 *auth_ntlmssp_state = ans;
232 if ((enum server_role)lp_server_role() == ROLE_STANDALONE) {
233 is_standalone = true;
235 is_standalone = false;
238 netbios_name = lp_netbios_name();
239 netbios_domain = lp_workgroup();
240 /* This should be a 'netbios domain -> DNS domain' mapping */
241 dns_domain = get_mydnsdomname(talloc_tos());
243 strlower_m(dns_domain);
245 dns_name = get_mydnsfullname();
247 ans->remote_address = tsocket_address_copy(remote_address, ans);
248 if (ans->remote_address == NULL) {
249 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
250 return NT_STATUS_NO_MEMORY;
253 nt_status = ntlmssp_server_start(ans,
259 &ans->ntlmssp_state);
260 if (!NT_STATUS_IS_OK(nt_status)) {
264 ans->ntlmssp_state->callback_private = ans;
265 ans->ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
266 ans->ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
267 ans->ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
268 ans->ntlmssp_state->check_password = auth_ntlmssp_check_password;
270 *auth_ntlmssp_state = ans;
274 NTSTATUS auth_generic_start(struct auth_ntlmssp_state *auth_ntlmssp_state, const char *oid)
276 if (auth_ntlmssp_state->auth_context->gensec_start_mech_by_oid) {
277 return auth_ntlmssp_state->auth_context->gensec_start_mech_by_oid(auth_ntlmssp_state->gensec_security, oid);
280 if (strcmp(oid, GENSEC_OID_NTLMSSP) != 0) {
281 /* The caller will then free the auth_ntlmssp_state,
282 * undoing what was done in auth_ntlmssp_prepare().
284 * We can't do that logic here, as
285 * auth_ntlmssp_want_feature() may have been called in
288 return NT_STATUS_NOT_IMPLEMENTED;
294 NTSTATUS auth_ntlmssp_start(struct auth_ntlmssp_state *auth_ntlmssp_state)
296 return auth_generic_start(auth_ntlmssp_state, GENSEC_OID_NTLMSSP);