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"
25 #include "ntlmssp_wrap.h"
26 #include "../librpc/gen_ndr/netlogon.h"
28 NTSTATUS
auth_ntlmssp_steal_session_info(TALLOC_CTX
*mem_ctx
,
29 struct auth_ntlmssp_state
*auth_ntlmssp_state
,
30 struct auth_serversupplied_info
**session_info
)
32 /* Free the current server_info user_session_key and reset it from the
33 * current ntlmssp_state session_key */
34 data_blob_free(&auth_ntlmssp_state
->server_info
->user_session_key
);
35 /* Set up the final session key for the connection */
36 auth_ntlmssp_state
->server_info
->user_session_key
=
38 auth_ntlmssp_state
->server_info
,
39 auth_ntlmssp_state
->ntlmssp_state
->session_key
.data
,
40 auth_ntlmssp_state
->ntlmssp_state
->session_key
.length
);
41 if (auth_ntlmssp_state
->ntlmssp_state
->session_key
.length
&&
42 !auth_ntlmssp_state
->server_info
->user_session_key
.data
) {
44 return NT_STATUS_NO_MEMORY
;
46 /* Steal session_info away from auth_ntlmssp_state */
47 *session_info
= talloc_move(mem_ctx
, &auth_ntlmssp_state
->server_info
);
52 * Return the challenge as determined by the authentication subsystem
53 * @return an 8 byte random challenge
56 static NTSTATUS
auth_ntlmssp_get_challenge(const struct ntlmssp_state
*ntlmssp_state
,
59 struct auth_ntlmssp_state
*auth_ntlmssp_state
=
60 (struct auth_ntlmssp_state
*)ntlmssp_state
->callback_private
;
61 auth_ntlmssp_state
->auth_context
->get_ntlm_challenge(
62 auth_ntlmssp_state
->auth_context
, chal
);
67 * Some authentication methods 'fix' the challenge, so we may not be able to set it
69 * @return If the effective challenge used by the auth subsystem may be modified
71 static bool auth_ntlmssp_may_set_challenge(const struct ntlmssp_state
*ntlmssp_state
)
73 struct auth_ntlmssp_state
*auth_ntlmssp_state
=
74 (struct auth_ntlmssp_state
*)ntlmssp_state
->callback_private
;
75 struct auth_context
*auth_context
= auth_ntlmssp_state
->auth_context
;
77 return auth_context
->challenge_may_be_modified
;
81 * NTLM2 authentication modifies the effective challenge,
82 * @param challenge The new challenge value
84 static NTSTATUS
auth_ntlmssp_set_challenge(struct ntlmssp_state
*ntlmssp_state
, DATA_BLOB
*challenge
)
86 struct auth_ntlmssp_state
*auth_ntlmssp_state
=
87 (struct auth_ntlmssp_state
*)ntlmssp_state
->callback_private
;
88 struct auth_context
*auth_context
= auth_ntlmssp_state
->auth_context
;
90 SMB_ASSERT(challenge
->length
== 8);
92 auth_context
->challenge
= data_blob_talloc(auth_context
,
93 challenge
->data
, challenge
->length
);
95 auth_context
->challenge_set_by
= "NTLMSSP callback (NTLM2)";
97 DEBUG(5, ("auth_context challenge set by %s\n", auth_context
->challenge_set_by
));
98 DEBUG(5, ("challenge is: \n"));
99 dump_data(5, auth_context
->challenge
.data
, auth_context
->challenge
.length
);
104 * Check the password on an NTLMSSP login.
106 * Return the session keys used on the connection.
109 static NTSTATUS
auth_ntlmssp_check_password(struct ntlmssp_state
*ntlmssp_state
, TALLOC_CTX
*mem_ctx
,
110 DATA_BLOB
*user_session_key
, DATA_BLOB
*lm_session_key
)
112 struct auth_ntlmssp_state
*auth_ntlmssp_state
=
113 (struct auth_ntlmssp_state
*)ntlmssp_state
->callback_private
;
114 struct auth_usersupplied_info
*user_info
= NULL
;
116 bool username_was_mapped
;
118 /* the client has given us its machine name (which we otherwise would not get on port 445).
119 we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
121 set_remote_machine_name(auth_ntlmssp_state
->ntlmssp_state
->client
.netbios_name
, True
);
123 /* setup the string used by %U */
124 /* sub_set_smb_name checks for weird internally */
125 sub_set_smb_name(auth_ntlmssp_state
->ntlmssp_state
->user
);
127 reload_services(smbd_messaging_context(), -1, True
);
129 nt_status
= make_user_info_map(&user_info
,
130 auth_ntlmssp_state
->ntlmssp_state
->user
,
131 auth_ntlmssp_state
->ntlmssp_state
->domain
,
132 auth_ntlmssp_state
->ntlmssp_state
->client
.netbios_name
,
133 auth_ntlmssp_state
->ntlmssp_state
->lm_resp
.data
? &auth_ntlmssp_state
->ntlmssp_state
->lm_resp
: NULL
,
134 auth_ntlmssp_state
->ntlmssp_state
->nt_resp
.data
? &auth_ntlmssp_state
->ntlmssp_state
->nt_resp
: NULL
,
136 AUTH_PASSWORD_RESPONSE
);
138 if (!NT_STATUS_IS_OK(nt_status
)) {
142 user_info
->logon_parameters
= MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT
| MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT
;
144 nt_status
= auth_ntlmssp_state
->auth_context
->check_ntlm_password(auth_ntlmssp_state
->auth_context
,
145 user_info
, &auth_ntlmssp_state
->server_info
);
147 username_was_mapped
= user_info
->was_mapped
;
149 free_user_info(&user_info
);
151 if (!NT_STATUS_IS_OK(nt_status
)) {
155 auth_ntlmssp_state
->server_info
->nss_token
|= username_was_mapped
;
157 nt_status
= create_local_token(auth_ntlmssp_state
->server_info
);
159 if (!NT_STATUS_IS_OK(nt_status
)) {
160 DEBUG(10, ("create_local_token failed: %s\n",
161 nt_errstr(nt_status
)));
165 /* Clear out the session keys, and pass them to the caller.
166 * They will not be used in this form again - instead the
167 * NTLMSSP code will decide on the final correct session key,
168 * and put it back here at the end of
169 * auth_ntlmssp_steal_server_info */
170 if (auth_ntlmssp_state
->server_info
->user_session_key
.length
) {
171 DEBUG(10, ("Got NT session key of length %u\n",
172 (unsigned int)auth_ntlmssp_state
->server_info
->user_session_key
.length
));
173 *user_session_key
= auth_ntlmssp_state
->server_info
->user_session_key
;
174 talloc_steal(mem_ctx
, auth_ntlmssp_state
->server_info
->user_session_key
.data
);
175 auth_ntlmssp_state
->server_info
->user_session_key
= data_blob_null
;
177 if (auth_ntlmssp_state
->server_info
->lm_session_key
.length
) {
178 DEBUG(10, ("Got LM session key of length %u\n",
179 (unsigned int)auth_ntlmssp_state
->server_info
->lm_session_key
.length
));
180 *lm_session_key
= auth_ntlmssp_state
->server_info
->lm_session_key
;
181 talloc_steal(mem_ctx
, auth_ntlmssp_state
->server_info
->lm_session_key
.data
);
182 auth_ntlmssp_state
->server_info
->lm_session_key
= data_blob_null
;
187 static int auth_ntlmssp_state_destructor(void *ptr
);
189 NTSTATUS
auth_ntlmssp_start(struct auth_ntlmssp_state
**auth_ntlmssp_state
)
193 const char *netbios_name
;
194 const char *netbios_domain
;
195 const char *dns_name
;
197 struct auth_ntlmssp_state
*ans
;
198 struct auth_context
*auth_context
;
200 if ((enum server_types
)lp_server_role() == ROLE_STANDALONE
) {
201 is_standalone
= true;
203 is_standalone
= false;
206 netbios_name
= global_myname();
207 netbios_domain
= lp_workgroup();
208 /* This should be a 'netbios domain -> DNS domain' mapping */
209 dns_domain
= get_mydnsdomname(talloc_tos());
211 strlower_m(dns_domain
);
213 dns_name
= get_mydnsfullname();
215 ans
= talloc_zero(NULL
, struct auth_ntlmssp_state
);
217 DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
218 return NT_STATUS_NO_MEMORY
;
221 nt_status
= ntlmssp_server_start(ans
,
227 &ans
->ntlmssp_state
);
228 if (!NT_STATUS_IS_OK(nt_status
)) {
232 nt_status
= make_auth_context_subsystem(talloc_tos(), &auth_context
);
233 if (!NT_STATUS_IS_OK(nt_status
)) {
236 ans
->auth_context
= talloc_steal(ans
, auth_context
);
238 ans
->ntlmssp_state
->callback_private
= ans
;
239 ans
->ntlmssp_state
->get_challenge
= auth_ntlmssp_get_challenge
;
240 ans
->ntlmssp_state
->may_set_challenge
= auth_ntlmssp_may_set_challenge
;
241 ans
->ntlmssp_state
->set_challenge
= auth_ntlmssp_set_challenge
;
242 ans
->ntlmssp_state
->check_password
= auth_ntlmssp_check_password
;
244 talloc_set_destructor((TALLOC_CTX
*)ans
, auth_ntlmssp_state_destructor
);
246 *auth_ntlmssp_state
= ans
;
250 static int auth_ntlmssp_state_destructor(void *ptr
)
252 struct auth_ntlmssp_state
*ans
;
254 ans
= talloc_get_type(ptr
, struct auth_ntlmssp_state
);
256 TALLOC_FREE(ans
->server_info
);
257 TALLOC_FREE(ans
->ntlmssp_state
);