source: vendor/3.5.4/source3/auth/auth_ntlmssp.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 7.4 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 void auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state,
31 uint8_t chal[8])
32{
33 AUTH_NTLMSSP_STATE *auth_ntlmssp_state =
34 (AUTH_NTLMSSP_STATE *)ntlmssp_state->auth_context;
35 auth_ntlmssp_state->auth_context->get_ntlm_challenge(
36 auth_ntlmssp_state->auth_context, chal);
37}
38
39/**
40 * Some authentication methods 'fix' the challenge, so we may not be able to set it
41 *
42 * @return If the effective challenge used by the auth subsystem may be modified
43 */
44static bool auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
45{
46 AUTH_NTLMSSP_STATE *auth_ntlmssp_state =
47 (AUTH_NTLMSSP_STATE *)ntlmssp_state->auth_context;
48 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
49
50 return auth_context->challenge_may_be_modified;
51}
52
53/**
54 * NTLM2 authentication modifies the effective challenge,
55 * @param challenge The new challenge value
56 */
57static NTSTATUS auth_ntlmssp_set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
58{
59 AUTH_NTLMSSP_STATE *auth_ntlmssp_state =
60 (AUTH_NTLMSSP_STATE *)ntlmssp_state->auth_context;
61 struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
62
63 SMB_ASSERT(challenge->length == 8);
64
65 auth_context->challenge = data_blob_talloc(auth_context->mem_ctx,
66 challenge->data, challenge->length);
67
68 auth_context->challenge_set_by = "NTLMSSP callback (NTLM2)";
69
70 DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
71 DEBUG(5, ("challenge is: \n"));
72 dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
73 return NT_STATUS_OK;
74}
75
76/**
77 * Check the password on an NTLMSSP login.
78 *
79 * Return the session keys used on the connection.
80 */
81
82static NTSTATUS auth_ntlmssp_check_password(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *user_session_key, DATA_BLOB *lm_session_key)
83{
84 AUTH_NTLMSSP_STATE *auth_ntlmssp_state =
85 (AUTH_NTLMSSP_STATE *)ntlmssp_state->auth_context;
86 auth_usersupplied_info *user_info = NULL;
87 NTSTATUS nt_status;
88 bool username_was_mapped;
89
90 /* the client has given us its machine name (which we otherwise would not get on port 445).
91 we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
92
93 set_remote_machine_name(auth_ntlmssp_state->ntlmssp_state->workstation, True);
94
95 /* setup the string used by %U */
96 /* sub_set_smb_name checks for weird internally */
97 sub_set_smb_name(auth_ntlmssp_state->ntlmssp_state->user);
98
99 reload_services(True);
100
101 nt_status = make_user_info_map(&user_info,
102 auth_ntlmssp_state->ntlmssp_state->user,
103 auth_ntlmssp_state->ntlmssp_state->domain,
104 auth_ntlmssp_state->ntlmssp_state->workstation,
105 auth_ntlmssp_state->ntlmssp_state->lm_resp.data ? &auth_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
106 auth_ntlmssp_state->ntlmssp_state->nt_resp.data ? &auth_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
107 NULL, NULL, NULL,
108 True);
109
110 user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
111
112 if (!NT_STATUS_IS_OK(nt_status)) {
113 return nt_status;
114 }
115
116 nt_status = auth_ntlmssp_state->auth_context->check_ntlm_password(auth_ntlmssp_state->auth_context,
117 user_info, &auth_ntlmssp_state->server_info);
118
119 username_was_mapped = user_info->was_mapped;
120
121 free_user_info(&user_info);
122
123 if (!NT_STATUS_IS_OK(nt_status)) {
124 return nt_status;
125 }
126
127 auth_ntlmssp_state->server_info->nss_token |= username_was_mapped;
128
129 nt_status = create_local_token(auth_ntlmssp_state->server_info);
130
131 if (!NT_STATUS_IS_OK(nt_status)) {
132 DEBUG(10, ("create_local_token failed: %s\n",
133 nt_errstr(nt_status)));
134 return nt_status;
135 }
136
137 if (auth_ntlmssp_state->server_info->user_session_key.length) {
138 DEBUG(10, ("Got NT session key of length %u\n",
139 (unsigned int)auth_ntlmssp_state->server_info->user_session_key.length));
140 *user_session_key = data_blob_talloc(auth_ntlmssp_state->mem_ctx,
141 auth_ntlmssp_state->server_info->user_session_key.data,
142 auth_ntlmssp_state->server_info->user_session_key.length);
143 }
144 if (auth_ntlmssp_state->server_info->lm_session_key.length) {
145 DEBUG(10, ("Got LM session key of length %u\n",
146 (unsigned int)auth_ntlmssp_state->server_info->lm_session_key.length));
147 *lm_session_key = data_blob_talloc(auth_ntlmssp_state->mem_ctx,
148 auth_ntlmssp_state->server_info->lm_session_key.data,
149 auth_ntlmssp_state->server_info->lm_session_key.length);
150 }
151 return nt_status;
152}
153
154NTSTATUS auth_ntlmssp_start(AUTH_NTLMSSP_STATE **auth_ntlmssp_state)
155{
156 NTSTATUS nt_status;
157 TALLOC_CTX *mem_ctx;
158
159 mem_ctx = talloc_init("AUTH NTLMSSP context");
160
161 *auth_ntlmssp_state = TALLOC_ZERO_P(mem_ctx, AUTH_NTLMSSP_STATE);
162 if (!*auth_ntlmssp_state) {
163 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
164 talloc_destroy(mem_ctx);
165 return NT_STATUS_NO_MEMORY;
166 }
167
168 ZERO_STRUCTP(*auth_ntlmssp_state);
169
170 (*auth_ntlmssp_state)->mem_ctx = mem_ctx;
171
172 if (!NT_STATUS_IS_OK(nt_status = ntlmssp_server_start(&(*auth_ntlmssp_state)->ntlmssp_state))) {
173 return nt_status;
174 }
175
176 if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&(*auth_ntlmssp_state)->auth_context))) {
177 return nt_status;
178 }
179
180 (*auth_ntlmssp_state)->ntlmssp_state->auth_context = (*auth_ntlmssp_state);
181 (*auth_ntlmssp_state)->ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
182 (*auth_ntlmssp_state)->ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
183 (*auth_ntlmssp_state)->ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
184 (*auth_ntlmssp_state)->ntlmssp_state->check_password = auth_ntlmssp_check_password;
185 (*auth_ntlmssp_state)->ntlmssp_state->server_role = (enum server_types)lp_server_role();
186
187 return NT_STATUS_OK;
188}
189
190void auth_ntlmssp_end(AUTH_NTLMSSP_STATE **auth_ntlmssp_state)
191{
192 TALLOC_CTX *mem_ctx;
193
194 if (*auth_ntlmssp_state == NULL) {
195 return;
196 }
197
198 mem_ctx = (*auth_ntlmssp_state)->mem_ctx;
199 if ((*auth_ntlmssp_state)->ntlmssp_state) {
200 ntlmssp_end(&(*auth_ntlmssp_state)->ntlmssp_state);
201 }
202 if ((*auth_ntlmssp_state)->auth_context) {
203 ((*auth_ntlmssp_state)->auth_context->free)(&(*auth_ntlmssp_state)->auth_context);
204 }
205 if ((*auth_ntlmssp_state)->server_info) {
206 TALLOC_FREE((*auth_ntlmssp_state)->server_info);
207 }
208 talloc_destroy(mem_ctx);
209 *auth_ntlmssp_state = NULL;
210}
211
212NTSTATUS auth_ntlmssp_update(AUTH_NTLMSSP_STATE *auth_ntlmssp_state,
213 const DATA_BLOB request, DATA_BLOB *reply)
214{
215 return ntlmssp_update(auth_ntlmssp_state->ntlmssp_state, request, reply);
216}
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