source: branches/samba-3.2.x/source/auth/auth_ntlmssp.c

Last change on this file was 133, checked in by Paul Smedley, 17 years ago

Update trunk to 3.2.0pre3
File size: 7.3 KB
Line 
1/*
2 Unix SMB/Netbios implementation.
3 Version 3.0
4 handle NLTMSSP, server side
5
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Andrew Bartlett 2001-2003
8
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.
13
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.
18
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/>.
21*/
22
23#include "includes.h"
24
25/**
26 * Return the challenge as determined by the authentication subsystem
27 * @return an 8 byte random challenge
28 */
29
30static const uint8 *auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state)
31{
32 AUTH_NTLMSSP_STATE *auth_ntlmssp_state =
33 (AUTH_NTLMSSP_STATE *)ntlmssp_state->auth_context;
34 return auth_ntlmssp_state->auth_context->get_ntlm_challenge(auth_ntlmssp_state->auth_context);
35}
36
37/**
38 * Some authentication methods 'fix' the challenge, so we may not be able to set it
39 *
40 * @return If the effective challenge used by the auth subsystem may be modified
41 */
42static bool auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
43{
44 AUTH_NTLMSSP_STATE *auth_ntlmssp_state =
45 (AUTH_NTLMSSP_STATE *)ntlmssp_state->auth_context;
46 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
47
48 return auth_context->challenge_may_be_modified;
49}
50
51/**
52 * NTLM2 authentication modifies the effective challenge,
53 * @param challenge The new challenge value
54 */
55static NTSTATUS auth_ntlmssp_set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
56{
57 AUTH_NTLMSSP_STATE *auth_ntlmssp_state =
58 (AUTH_NTLMSSP_STATE *)ntlmssp_state->auth_context;
59 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
60
61 SMB_ASSERT(challenge->length == 8);
62
63 auth_context->challenge = data_blob_talloc(auth_context->mem_ctx,
64 challenge->data, challenge->length);
65
66 auth_context->challenge_set_by = "NTLMSSP callback (NTLM2)";
67
68 DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
69 DEBUG(5, ("challenge is: \n"));
70 dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
71 return NT_STATUS_OK;
72}
73
74/**
75 * Check the password on an NTLMSSP login.
76 *
77 * Return the session keys used on the connection.
78 */
79
80static NTSTATUS auth_ntlmssp_check_password(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
81{
82 AUTH_NTLMSSP_STATE *auth_ntlmssp_state =
83 (AUTH_NTLMSSP_STATE *)ntlmssp_state->auth_context;
84 auth_usersupplied_info *user_info = NULL;
85 NTSTATUS nt_status;
86 bool username_was_mapped;
87
88 /* the client has given us its machine name (which we otherwise would not get on port 445).
89 we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
90
91 set_remote_machine_name(auth_ntlmssp_state->ntlmssp_state->workstation, True);
92
93 /* setup the string used by %U */
94 /* sub_set_smb_name checks for weird internally */
95 sub_set_smb_name(auth_ntlmssp_state->ntlmssp_state->user);
96
97 reload_services(True);
98
99 nt_status = make_user_info_map(&user_info,
100 auth_ntlmssp_state->ntlmssp_state->user,
101 auth_ntlmssp_state->ntlmssp_state->domain,
102 auth_ntlmssp_state->ntlmssp_state->workstation,
103 auth_ntlmssp_state->ntlmssp_state->lm_resp.data ? &auth_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
104 auth_ntlmssp_state->ntlmssp_state->nt_resp.data ? &auth_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
105 NULL, NULL, NULL,
106 True);
107
108 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
109
110 if (!NT_STATUS_IS_OK(nt_status)) {
111 return nt_status;
112 }
113
114 nt_status = auth_ntlmssp_state->auth_context->check_ntlm_password(auth_ntlmssp_state->auth_context,
115 user_info, &auth_ntlmssp_state->server_info);
116
117 username_was_mapped = user_info->was_mapped;
118
119 free_user_info(&user_info);
120
121 if (!NT_STATUS_IS_OK(nt_status)) {
122 return nt_status;
123 }
124
125 auth_ntlmssp_state->server_info->was_mapped |= username_was_mapped;
126
127 nt_status = create_local_token(auth_ntlmssp_state->server_info);
128
129 if (!NT_STATUS_IS_OK(nt_status)) {
130 DEBUG(10, ("create_local_token failed: %s\n",
131 nt_errstr(nt_status)));
132 return nt_status;
133 }
134
135 if (auth_ntlmssp_state->server_info->user_session_key.length) {
136 DEBUG(10, ("Got NT session key of length %u\n",
137 (unsigned int)auth_ntlmssp_state->server_info->user_session_key.length));
138 *user_session_key = data_blob_talloc(auth_ntlmssp_state->mem_ctx,
139 auth_ntlmssp_state->server_info->user_session_key.data,
140 auth_ntlmssp_state->server_info->user_session_key.length);
141 }
142 if (auth_ntlmssp_state->server_info->lm_session_key.length) {
143 DEBUG(10, ("Got LM session key of length %u\n",
144 (unsigned int)auth_ntlmssp_state->server_info->lm_session_key.length));
145 *lm_session_key = data_blob_talloc(auth_ntlmssp_state->mem_ctx,
146 auth_ntlmssp_state->server_info->lm_session_key.data,
147 auth_ntlmssp_state->server_info->lm_session_key.length);
148 }
149 return nt_status;
150}
151
152NTSTATUS auth_ntlmssp_start(AUTH_NTLMSSP_STATE **auth_ntlmssp_state)
153{
154 NTSTATUS nt_status;
155 TALLOC_CTX *mem_ctx;
156
157 mem_ctx = talloc_init("AUTH NTLMSSP context");
158
159 *auth_ntlmssp_state = TALLOC_ZERO_P(mem_ctx, AUTH_NTLMSSP_STATE);
160 if (!*auth_ntlmssp_state) {
161 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
162 talloc_destroy(mem_ctx);
163 return NT_STATUS_NO_MEMORY;
164 }
165
166 ZERO_STRUCTP(*auth_ntlmssp_state);
167
168 (*auth_ntlmssp_state)->mem_ctx = mem_ctx;
169
170 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_start(&(*auth_ntlmssp_state)->ntlmssp_state))) {
171 return nt_status;
172 }
173
174 if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&(*auth_ntlmssp_state)->auth_context))) {
175 return nt_status;
176 }
177
178 (*auth_ntlmssp_state)->ntlmssp_state->auth_context = (*auth_ntlmssp_state);
179 (*auth_ntlmssp_state)->ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
180 (*auth_ntlmssp_state)->ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
181 (*auth_ntlmssp_state)->ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
182 (*auth_ntlmssp_state)->ntlmssp_state->check_password = auth_ntlmssp_check_password;
183 (*auth_ntlmssp_state)->ntlmssp_state->server_role = (enum server_types)lp_server_role();
184
185 return NT_STATUS_OK;
186}
187
188void auth_ntlmssp_end(AUTH_NTLMSSP_STATE **auth_ntlmssp_state)
189{
190 TALLOC_CTX *mem_ctx;
191
192 if (*auth_ntlmssp_state == NULL) {
193 return;
194 }
195
196 mem_ctx = (*auth_ntlmssp_state)->mem_ctx;
197 if ((*auth_ntlmssp_state)->ntlmssp_state) {
198 ntlmssp_end(&(*auth_ntlmssp_state)->ntlmssp_state);
199 }
200 if ((*auth_ntlmssp_state)->auth_context) {
201 ((*auth_ntlmssp_state)->auth_context->free)(&(*auth_ntlmssp_state)->auth_context);
202 }
203 if ((*auth_ntlmssp_state)->server_info) {
204 TALLOC_FREE((*auth_ntlmssp_state)->server_info);
205 }
206 talloc_destroy(mem_ctx);
207 *auth_ntlmssp_state = NULL;
208}
209
210NTSTATUS auth_ntlmssp_update(AUTH_NTLMSSP_STATE *auth_ntlmssp_state,
211 const DATA_BLOB request, DATA_BLOB *reply)
212{
213 return ntlmssp_update(auth_ntlmssp_state->ntlmssp_state, request, reply);
214}
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