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 3 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, see <http://www.gnu.org/licenses/>.
24 #include "../libcli/auth/ntlmssp.h"
26 struct auth_ntlmssp_state
{
28 struct auth_context
*auth_context
;
29 struct auth_serversupplied_info
*server_info
;
30 struct ntlmssp_state
*ntlmssp_state
;
33 NTSTATUS
auth_ntlmssp_sign_packet(struct auth_ntlmssp_state
*auth_ntlmssp_state
,
34 TALLOC_CTX
*sig_mem_ctx
,
35 const uint8_t *data
, size_t length
,
36 const uint8_t *whole_pdu
, size_t pdu_length
,
39 return ntlmssp_sign_packet(auth_ntlmssp_state
->ntlmssp_state
, sig_mem_ctx
, data
, length
, whole_pdu
, pdu_length
, sig
);
42 NTSTATUS
auth_ntlmssp_check_packet(struct auth_ntlmssp_state
*auth_ntlmssp_state
,
43 const uint8_t *data
, size_t length
,
44 const uint8_t *whole_pdu
, size_t pdu_length
,
47 return ntlmssp_check_packet(auth_ntlmssp_state
->ntlmssp_state
, data
, length
, whole_pdu
, pdu_length
, sig
);
50 NTSTATUS
auth_ntlmssp_seal_packet(struct auth_ntlmssp_state
*auth_ntlmssp_state
,
51 TALLOC_CTX
*sig_mem_ctx
,
52 uint8_t *data
, size_t length
,
53 const uint8_t *whole_pdu
, size_t pdu_length
,
56 return ntlmssp_seal_packet(auth_ntlmssp_state
->ntlmssp_state
, sig_mem_ctx
, data
, length
, whole_pdu
, pdu_length
, sig
);
59 NTSTATUS
auth_ntlmssp_unseal_packet(struct auth_ntlmssp_state
*auth_ntlmssp_state
,
60 uint8_t *data
, size_t length
,
61 const uint8_t *whole_pdu
, size_t pdu_length
,
64 return ntlmssp_unseal_packet(auth_ntlmssp_state
->ntlmssp_state
, data
, length
, whole_pdu
, pdu_length
, sig
);
67 bool auth_ntlmssp_negotiated_sign(struct auth_ntlmssp_state
*auth_ntlmssp_state
)
69 return auth_ntlmssp_state
->ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_SIGN
;
72 bool auth_ntlmssp_negotiated_seal(struct auth_ntlmssp_state
*auth_ntlmssp_state
)
74 return auth_ntlmssp_state
->ntlmssp_state
->neg_flags
& NTLMSSP_NEGOTIATE_SEAL
;
77 struct auth_serversupplied_info
*auth_ntlmssp_server_info(TALLOC_CTX
*mem_ctx
,
78 struct auth_ntlmssp_state
*auth_ntlmssp_state
)
80 struct auth_serversupplied_info
*server_info
= auth_ntlmssp_state
->server_info
;
81 data_blob_free(&server_info
->user_session_key
);
82 server_info
->user_session_key
=
85 auth_ntlmssp_state
->ntlmssp_state
->session_key
.data
,
86 auth_ntlmssp_state
->ntlmssp_state
->session_key
.length
);
87 if (auth_ntlmssp_state
->ntlmssp_state
->session_key
.length
&& !server_info
->user_session_key
.data
) {
90 auth_ntlmssp_state
->server_info
= NULL
;
91 return talloc_steal(mem_ctx
, server_info
);
94 struct ntlmssp_state
*auth_ntlmssp_get_ntlmssp_state(struct auth_ntlmssp_state
*auth_ntlmssp_state
)
96 return auth_ntlmssp_state
->ntlmssp_state
;
99 /* Needed for 'map to guest' and 'smb username' processing */
100 const char *auth_ntlmssp_get_username(struct auth_ntlmssp_state
*auth_ntlmssp_state
)
102 return auth_ntlmssp_state
->ntlmssp_state
->user
;
105 const char *auth_ntlmssp_get_domain(struct auth_ntlmssp_state
*auth_ntlmssp_state
)
107 return auth_ntlmssp_state
->ntlmssp_state
->domain
;
110 const char *auth_ntlmssp_get_client(struct auth_ntlmssp_state
*auth_ntlmssp_state
)
112 return auth_ntlmssp_state
->ntlmssp_state
->client
.netbios_name
;
116 * Return the challenge as determined by the authentication subsystem
117 * @return an 8 byte random challenge
120 static NTSTATUS
auth_ntlmssp_get_challenge(const struct ntlmssp_state
*ntlmssp_state
,
123 struct auth_ntlmssp_state
*auth_ntlmssp_state
=
124 (struct auth_ntlmssp_state
*)ntlmssp_state
->callback_private
;
125 auth_ntlmssp_state
->auth_context
->get_ntlm_challenge(
126 auth_ntlmssp_state
->auth_context
, chal
);
131 * Some authentication methods 'fix' the challenge, so we may not be able to set it
133 * @return If the effective challenge used by the auth subsystem may be modified
135 static bool auth_ntlmssp_may_set_challenge(const struct ntlmssp_state
*ntlmssp_state
)
137 struct auth_ntlmssp_state
*auth_ntlmssp_state
=
138 (struct auth_ntlmssp_state
*)ntlmssp_state
->callback_private
;
139 struct auth_context
*auth_context
= auth_ntlmssp_state
->auth_context
;
141 return auth_context
->challenge_may_be_modified
;
145 * NTLM2 authentication modifies the effective challenge,
146 * @param challenge The new challenge value
148 static NTSTATUS
auth_ntlmssp_set_challenge(struct ntlmssp_state
*ntlmssp_state
, DATA_BLOB
*challenge
)
150 struct auth_ntlmssp_state
*auth_ntlmssp_state
=
151 (struct auth_ntlmssp_state
*)ntlmssp_state
->callback_private
;
152 struct auth_context
*auth_context
= auth_ntlmssp_state
->auth_context
;
154 SMB_ASSERT(challenge
->length
== 8);
156 auth_context
->challenge
= data_blob_talloc(auth_context
,
157 challenge
->data
, challenge
->length
);
159 auth_context
->challenge_set_by
= "NTLMSSP callback (NTLM2)";
161 DEBUG(5, ("auth_context challenge set by %s\n", auth_context
->challenge_set_by
));
162 DEBUG(5, ("challenge is: \n"));
163 dump_data(5, auth_context
->challenge
.data
, auth_context
->challenge
.length
);
168 * Check the password on an NTLMSSP login.
170 * Return the session keys used on the connection.
173 static NTSTATUS
auth_ntlmssp_check_password(struct ntlmssp_state
*ntlmssp_state
, DATA_BLOB
*user_session_key
, DATA_BLOB
*lm_session_key
)
175 struct auth_ntlmssp_state
*auth_ntlmssp_state
=
176 (struct auth_ntlmssp_state
*)ntlmssp_state
->callback_private
;
177 struct auth_usersupplied_info
*user_info
= NULL
;
179 bool username_was_mapped
;
181 /* the client has given us its machine name (which we otherwise would not get on port 445).
182 we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
184 set_remote_machine_name(auth_ntlmssp_state
->ntlmssp_state
->client
.netbios_name
, True
);
186 /* setup the string used by %U */
187 /* sub_set_smb_name checks for weird internally */
188 sub_set_smb_name(auth_ntlmssp_state
->ntlmssp_state
->user
);
190 reload_services(True
);
192 nt_status
= make_user_info_map(&user_info
,
193 auth_ntlmssp_state
->ntlmssp_state
->user
,
194 auth_ntlmssp_state
->ntlmssp_state
->domain
,
195 auth_ntlmssp_state
->ntlmssp_state
->client
.netbios_name
,
196 auth_ntlmssp_state
->ntlmssp_state
->lm_resp
.data
? &auth_ntlmssp_state
->ntlmssp_state
->lm_resp
: NULL
,
197 auth_ntlmssp_state
->ntlmssp_state
->nt_resp
.data
? &auth_ntlmssp_state
->ntlmssp_state
->nt_resp
: NULL
,
201 user_info
->logon_parameters
= MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT
| MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT
;
203 if (!NT_STATUS_IS_OK(nt_status
)) {
207 nt_status
= auth_ntlmssp_state
->auth_context
->check_ntlm_password(auth_ntlmssp_state
->auth_context
,
208 user_info
, &auth_ntlmssp_state
->server_info
);
210 username_was_mapped
= user_info
->was_mapped
;
212 free_user_info(&user_info
);
214 if (!NT_STATUS_IS_OK(nt_status
)) {
218 auth_ntlmssp_state
->server_info
->nss_token
|= username_was_mapped
;
220 nt_status
= create_local_token(auth_ntlmssp_state
->server_info
);
222 if (!NT_STATUS_IS_OK(nt_status
)) {
223 DEBUG(10, ("create_local_token failed: %s\n",
224 nt_errstr(nt_status
)));
228 if (auth_ntlmssp_state
->server_info
->user_session_key
.length
) {
229 DEBUG(10, ("Got NT session key of length %u\n",
230 (unsigned int)auth_ntlmssp_state
->server_info
->user_session_key
.length
));
231 *user_session_key
= data_blob_talloc(auth_ntlmssp_state
->mem_ctx
,
232 auth_ntlmssp_state
->server_info
->user_session_key
.data
,
233 auth_ntlmssp_state
->server_info
->user_session_key
.length
);
235 if (auth_ntlmssp_state
->server_info
->lm_session_key
.length
) {
236 DEBUG(10, ("Got LM session key of length %u\n",
237 (unsigned int)auth_ntlmssp_state
->server_info
->lm_session_key
.length
));
238 *lm_session_key
= data_blob_talloc(auth_ntlmssp_state
->mem_ctx
,
239 auth_ntlmssp_state
->server_info
->lm_session_key
.data
,
240 auth_ntlmssp_state
->server_info
->lm_session_key
.length
);
245 NTSTATUS
auth_ntlmssp_start(struct auth_ntlmssp_state
**auth_ntlmssp_state
)
250 const char *netbios_name
;
251 const char *netbios_domain
;
252 const char *dns_name
;
255 if ((enum server_types
)lp_server_role() == ROLE_STANDALONE
) {
256 is_standalone
= true;
258 is_standalone
= false;
261 netbios_name
= global_myname();
262 netbios_domain
= lp_workgroup();
263 /* This should be a 'netbios domain -> DNS domain' mapping */
264 dns_domain
= get_mydnsdomname(talloc_tos());
266 strlower_m(dns_domain
);
268 dns_name
= get_mydnsfullname();
270 mem_ctx
= talloc_init("AUTH NTLMSSP context");
272 *auth_ntlmssp_state
= TALLOC_ZERO_P(mem_ctx
, struct auth_ntlmssp_state
);
273 if (!*auth_ntlmssp_state
) {
274 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
275 talloc_destroy(mem_ctx
);
276 return NT_STATUS_NO_MEMORY
;
279 ZERO_STRUCTP(*auth_ntlmssp_state
);
281 (*auth_ntlmssp_state
)->mem_ctx
= mem_ctx
;
283 nt_status
= ntlmssp_server_start(NULL
,
289 &(*auth_ntlmssp_state
)->ntlmssp_state
);
290 if (!NT_STATUS_IS_OK(nt_status
)) {
294 if (!NT_STATUS_IS_OK(nt_status
= make_auth_context_subsystem(&(*auth_ntlmssp_state
)->auth_context
))) {
298 (*auth_ntlmssp_state
)->ntlmssp_state
->callback_private
= (*auth_ntlmssp_state
);
299 (*auth_ntlmssp_state
)->ntlmssp_state
->get_challenge
= auth_ntlmssp_get_challenge
;
300 (*auth_ntlmssp_state
)->ntlmssp_state
->may_set_challenge
= auth_ntlmssp_may_set_challenge
;
301 (*auth_ntlmssp_state
)->ntlmssp_state
->set_challenge
= auth_ntlmssp_set_challenge
;
302 (*auth_ntlmssp_state
)->ntlmssp_state
->check_password
= auth_ntlmssp_check_password
;
307 void auth_ntlmssp_end(struct auth_ntlmssp_state
**auth_ntlmssp_state
)
311 if (*auth_ntlmssp_state
== NULL
) {
315 mem_ctx
= (*auth_ntlmssp_state
)->mem_ctx
;
316 if ((*auth_ntlmssp_state
)->ntlmssp_state
) {
317 ntlmssp_end(&(*auth_ntlmssp_state
)->ntlmssp_state
);
319 if ((*auth_ntlmssp_state
)->auth_context
) {
320 ((*auth_ntlmssp_state
)->auth_context
->free
)(&(*auth_ntlmssp_state
)->auth_context
);
322 if ((*auth_ntlmssp_state
)->server_info
) {
323 TALLOC_FREE((*auth_ntlmssp_state
)->server_info
);
325 talloc_destroy(mem_ctx
);
326 *auth_ntlmssp_state
= NULL
;
329 NTSTATUS
auth_ntlmssp_update(struct auth_ntlmssp_state
*auth_ntlmssp_state
,
330 const DATA_BLOB request
, DATA_BLOB
*reply
)
332 return ntlmssp_update(auth_ntlmssp_state
->ntlmssp_state
, request
, reply
);