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 *auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state)
33 AUTH_NTLMSSP_STATE *auth_ntlmssp_state = ntlmssp_state->auth_context;
34 return auth_ntlmssp_state->auth_context->get_ntlm_challenge(auth_ntlmssp_state->auth_context);
38 * Some authentication methods 'fix' the challenge, so we may not be able to set it
40 * @return If the effective challenge used by the auth subsystem may be modified
42 static BOOL auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
44 AUTH_NTLMSSP_STATE *auth_ntlmssp_state = ntlmssp_state->auth_context;
45 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
47 return 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 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 AUTH_NTLMSSP_STATE *auth_ntlmssp_state = ntlmssp_state->auth_context;
81 auth_usersupplied_info *user_info = NULL;
84 /* the client has given us its machine name (which we otherwise would not get on port 445).
85 we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
87 set_remote_machine_name(auth_ntlmssp_state->ntlmssp_state->workstation, True);
89 /* setup the string used by %U */
90 /* sub_set_smb_name checks for weird internally */
91 sub_set_smb_name(auth_ntlmssp_state->ntlmssp_state->user);
93 reload_services(True);
95 nt_status = make_user_info_map(&user_info,
96 auth_ntlmssp_state->ntlmssp_state->user,
97 auth_ntlmssp_state->ntlmssp_state->domain,
98 auth_ntlmssp_state->ntlmssp_state->workstation,
99 auth_ntlmssp_state->ntlmssp_state->lm_resp.data ? &auth_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
100 auth_ntlmssp_state->ntlmssp_state->nt_resp.data ? &auth_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
104 if (!NT_STATUS_IS_OK(nt_status)) {
108 nt_status = auth_ntlmssp_state->auth_context->check_ntlm_password(auth_ntlmssp_state->auth_context,
109 user_info, &auth_ntlmssp_state->server_info);
111 free_user_info(&user_info);
113 if (!NT_STATUS_IS_OK(nt_status)) {
116 if (auth_ntlmssp_state->server_info->user_session_key.length) {
117 DEBUG(10, ("Got NT session key of length %u\n",
118 (unsigned int)auth_ntlmssp_state->server_info->user_session_key.length));
119 *user_session_key = data_blob_talloc(auth_ntlmssp_state->mem_ctx,
120 auth_ntlmssp_state->server_info->user_session_key.data,
121 auth_ntlmssp_state->server_info->user_session_key.length);
123 if (auth_ntlmssp_state->server_info->lm_session_key.length) {
124 DEBUG(10, ("Got LM session key of length %u\n",
125 (unsigned int)auth_ntlmssp_state->server_info->lm_session_key.length));
126 *lm_session_key = data_blob_talloc(auth_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(AUTH_NTLMSSP_STATE **auth_ntlmssp_state)
138 mem_ctx = talloc_init("AUTH NTLMSSP context");
140 *auth_ntlmssp_state = TALLOC_ZERO_P(mem_ctx, 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(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 ((*auth_ntlmssp_state)->auth_context->free)(&(*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;
186 NTSTATUS auth_ntlmssp_update(AUTH_NTLMSSP_STATE *auth_ntlmssp_state,
187 const DATA_BLOB request, DATA_BLOB *reply)
189 return ntlmssp_update(auth_ntlmssp_state->ntlmssp_state, request, reply);