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 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
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",
120 (unsigned int)auth_ntlmssp_state->server_info->user_session_key.length));
121 *user_session_key = data_blob_talloc(auth_ntlmssp_state->mem_ctx,
122 auth_ntlmssp_state->server_info->user_session_key.data,
123 auth_ntlmssp_state->server_info->user_session_key.length);
125 if (auth_ntlmssp_state->server_info->lm_session_key.length) {
126 DEBUG(10, ("Got LM session key of length %u\n",
127 (unsigned int)auth_ntlmssp_state->server_info->lm_session_key.length));
128 *lm_session_key = data_blob_talloc(auth_ntlmssp_state->mem_ctx,
129 auth_ntlmssp_state->server_info->lm_session_key.data,
130 auth_ntlmssp_state->server_info->lm_session_key.length);
135 NTSTATUS auth_ntlmssp_start(AUTH_NTLMSSP_STATE **auth_ntlmssp_state)
140 mem_ctx = talloc_init("AUTH NTLMSSP context");
142 *auth_ntlmssp_state = TALLOC_ZERO_P(mem_ctx, AUTH_NTLMSSP_STATE);
143 if (!*auth_ntlmssp_state) {
144 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
145 talloc_destroy(mem_ctx);
146 return NT_STATUS_NO_MEMORY;
149 ZERO_STRUCTP(*auth_ntlmssp_state);
151 (*auth_ntlmssp_state)->mem_ctx = mem_ctx;
153 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_start(&(*auth_ntlmssp_state)->ntlmssp_state))) {
157 if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&(*auth_ntlmssp_state)->auth_context))) {
161 (*auth_ntlmssp_state)->ntlmssp_state->auth_context = (*auth_ntlmssp_state);
162 (*auth_ntlmssp_state)->ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
163 (*auth_ntlmssp_state)->ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
164 (*auth_ntlmssp_state)->ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
165 (*auth_ntlmssp_state)->ntlmssp_state->check_password = auth_ntlmssp_check_password;
166 (*auth_ntlmssp_state)->ntlmssp_state->server_role = lp_server_role();
171 void auth_ntlmssp_end(AUTH_NTLMSSP_STATE **auth_ntlmssp_state)
173 TALLOC_CTX *mem_ctx = (*auth_ntlmssp_state)->mem_ctx;
175 if ((*auth_ntlmssp_state)->ntlmssp_state) {
176 ntlmssp_end(&(*auth_ntlmssp_state)->ntlmssp_state);
178 if ((*auth_ntlmssp_state)->auth_context) {
179 ((*auth_ntlmssp_state)->auth_context->free)(&(*auth_ntlmssp_state)->auth_context);
181 if ((*auth_ntlmssp_state)->server_info) {
182 free_server_info(&(*auth_ntlmssp_state)->server_info);
184 talloc_destroy(mem_ctx);
185 *auth_ntlmssp_state = NULL;
188 NTSTATUS auth_ntlmssp_update(AUTH_NTLMSSP_STATE *auth_ntlmssp_state,
189 const DATA_BLOB request, DATA_BLOB *reply)
191 return ntlmssp_update(auth_ntlmssp_state->ntlmssp_state, request, reply);