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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 * Return the challenge as determined by the authentication subsystem
28 * @return an 8 byte random challenge
31 static const uint8_t *auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state)
33 struct auth_ntlmssp_state *auth_ntlmssp_state = ntlmssp_state->auth_context;
35 return auth_ntlmssp_state->auth_context->get_ntlm_challenge(auth_ntlmssp_state->auth_context);
39 * Some authentication methods 'fix' the challenge, so we may not be able to set it
41 * @return If the effective challenge used by the auth subsystem may be modified
43 static BOOL auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
45 struct auth_ntlmssp_state *auth_ntlmssp_state = ntlmssp_state->auth_context;
47 return auth_ntlmssp_state->auth_context->challenge_may_be_modified;
51 * NTLM2 authentication modifies the effective challenge,
52 * @param challenge The new challenge value
54 static NTSTATUS auth_ntlmssp_set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
56 struct auth_ntlmssp_state *auth_ntlmssp_state = ntlmssp_state->auth_context;
57 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
59 SMB_ASSERT(challenge->length == 8);
61 auth_context->challenge = data_blob_talloc(auth_context->mem_ctx,
62 challenge->data, challenge->length);
64 auth_context->challenge_set_by = "NTLMSSP callback (NTLM2)";
66 DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
67 DEBUG(5, ("challenge is: \n"));
68 dump_data(5, (const char *)auth_context->challenge.data, auth_context->challenge.length);
73 * Check the password on an NTLMSSP login.
75 * Return the session keys used on the connection.
78 static NTSTATUS auth_ntlmssp_check_password(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
80 struct auth_ntlmssp_state *auth_ntlmssp_state = ntlmssp_state->auth_context;
81 struct auth_usersupplied_info *user_info = NULL;
85 /* the client has given us its machine name (which we otherwise would not get on port 445).
86 we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
88 set_remote_machine_name(auth_ntlmssp_state->ntlmssp_state->workstation, True);
90 /* setup the string used by %U */
91 /* sub_set_smb_name checks for weird internally */
92 sub_set_smb_name(auth_ntlmssp_state->ntlmssp_state->user);
94 reload_services(True);
97 nt_status = make_user_info_map(&user_info,
98 auth_ntlmssp_state->ntlmssp_state->user,
99 auth_ntlmssp_state->ntlmssp_state->domain,
100 auth_ntlmssp_state->ntlmssp_state->workstation,
101 auth_ntlmssp_state->ntlmssp_state->lm_resp.data ? &auth_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
102 auth_ntlmssp_state->ntlmssp_state->nt_resp.data ? &auth_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
106 if (!NT_STATUS_IS_OK(nt_status)) {
110 nt_status = auth_ntlmssp_state->auth_context->check_ntlm_password(auth_ntlmssp_state->auth_context,
111 user_info, &auth_ntlmssp_state->server_info);
113 free_user_info(&user_info);
115 if (!NT_STATUS_IS_OK(nt_status)) {
118 if (auth_ntlmssp_state->server_info->user_session_key.length) {
119 DEBUG(10, ("Got NT session key of length %u\n", auth_ntlmssp_state->server_info->user_session_key.length));
120 *user_session_key = data_blob_talloc(ntlmssp_state->mem_ctx,
121 auth_ntlmssp_state->server_info->user_session_key.data,
122 auth_ntlmssp_state->server_info->user_session_key.length);
124 if (auth_ntlmssp_state->server_info->lm_session_key.length) {
125 DEBUG(10, ("Got LM session key of length %u\n", auth_ntlmssp_state->server_info->lm_session_key.length));
126 *lm_session_key = data_blob_talloc(ntlmssp_state->mem_ctx,
127 auth_ntlmssp_state->server_info->lm_session_key.data,
128 auth_ntlmssp_state->server_info->lm_session_key.length);
133 NTSTATUS auth_ntlmssp_start(struct auth_ntlmssp_state **auth_ntlmssp_state)
138 mem_ctx = talloc_init("AUTH NTLMSSP context");
140 *auth_ntlmssp_state = talloc_zero(mem_ctx, sizeof(**auth_ntlmssp_state));
141 if (!*auth_ntlmssp_state) {
142 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
143 talloc_destroy(mem_ctx);
144 return NT_STATUS_NO_MEMORY;
147 ZERO_STRUCTP(*auth_ntlmssp_state);
149 (*auth_ntlmssp_state)->mem_ctx = mem_ctx;
151 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_start(&(*auth_ntlmssp_state)->ntlmssp_state))) {
155 if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&(*auth_ntlmssp_state)->auth_context))) {
159 (*auth_ntlmssp_state)->ntlmssp_state->auth_context = (*auth_ntlmssp_state);
160 (*auth_ntlmssp_state)->ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
161 (*auth_ntlmssp_state)->ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
162 (*auth_ntlmssp_state)->ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
163 (*auth_ntlmssp_state)->ntlmssp_state->check_password = auth_ntlmssp_check_password;
164 (*auth_ntlmssp_state)->ntlmssp_state->server_role = lp_server_role();
169 void auth_ntlmssp_end(struct auth_ntlmssp_state **auth_ntlmssp_state)
171 TALLOC_CTX *mem_ctx = (*auth_ntlmssp_state)->mem_ctx;
173 if ((*auth_ntlmssp_state)->ntlmssp_state) {
174 ntlmssp_end(&(*auth_ntlmssp_state)->ntlmssp_state);
176 if ((*auth_ntlmssp_state)->auth_context) {
177 free_auth_context(&(*auth_ntlmssp_state)->auth_context);
179 if ((*auth_ntlmssp_state)->server_info) {
180 free_server_info(&(*auth_ntlmssp_state)->server_info);
182 talloc_destroy(mem_ctx);
183 *auth_ntlmssp_state = NULL;
188 * Next state function for the wrapped NTLMSSP state machine
190 * @param auth_ntlmssp_state NTLMSSP State
191 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
192 * @param in The request, as a DATA_BLOB
193 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
194 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
195 * or NT_STATUS_OK if the user is authenticated.
198 NTSTATUS auth_ntlmssp_update(struct auth_ntlmssp_state *auth_ntlmssp_state,
199 TALLOC_CTX *out_mem_ctx,
200 const DATA_BLOB in, DATA_BLOB *out)
202 return ntlmssp_update(auth_ntlmssp_state->ntlmssp_state,
208 * Return the credentials of a logged on user, including session keys
211 * Only valid after a successful authentication
213 * May only be called once per authentication.
217 NTSTATUS auth_ntlmssp_get_session_info(struct auth_ntlmssp_state *auth_ntlmssp_state,
218 struct auth_session_info **session_info)
221 nt_status = make_session_info(auth_ntlmssp_state->server_info, session_info);
223 if (!NT_STATUS_IS_OK(nt_status)) {
227 /* the session_info owns this now */
228 auth_ntlmssp_state->server_info = NULL;
230 (*session_info)->session_key = data_blob_talloc((*session_info)->mem_ctx,
231 auth_ntlmssp_state->ntlmssp_state->session_key.data,
232 auth_ntlmssp_state->ntlmssp_state->session_key.length);