2 Unix SMB/CIFS implementation.
3 kerberos authorization data (PAC) utility library
4 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Luke Howard 2002-2003
8 Copyright (C) Stefan Metzmacher 2004-2005
9 Copyright (C) Guenther Deschner 2005,2007,2008
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include "librpc/gen_ndr/ndr_krb5pac.h"
28 #include "libads/kerberos_proto.h"
29 #include "auth/common_auth.h"
30 #include "lib/param/param.h"
31 #include "librpc/crypto/gse.h"
32 #include "auth/gensec/gensec.h"
33 #include "auth/gensec/gensec_internal.h" /* TODO: remove this */
34 #include "../libcli/auth/spnego.h"
38 #include "auth/kerberos/pac_utils.h"
40 struct smb_krb5_context
;
43 * Given the username/password, do a kinit, store the ticket in
44 * cache_name if specified, and return the PAC_LOGON_INFO (the
45 * structure containing the important user information such as
48 NTSTATUS
kerberos_return_pac(TALLOC_CTX
*mem_ctx
,
53 time_t *renew_till_time
,
54 const char *cache_name
,
56 bool add_netbios_addr
,
57 time_t renewable_time
,
58 const char *impersonate_princ_s
,
59 const char *local_service
,
60 char **_canon_principal
,
62 struct PAC_DATA_CTR
**_pac_data_ctr
)
65 NTSTATUS status
= NT_STATUS_INVALID_PARAMETER
;
66 DATA_BLOB tkt
= data_blob_null
;
67 DATA_BLOB tkt_wrapped
= data_blob_null
;
68 DATA_BLOB ap_rep
= data_blob_null
;
69 DATA_BLOB sesskey1
= data_blob_null
;
70 const char *auth_princ
= NULL
;
71 const char *cc
= "MEMORY:kerberos_return_pac";
72 struct auth_session_info
*session_info
;
73 struct gensec_security
*gensec_server_context
;
74 const struct gensec_security_ops
**backends
;
75 struct gensec_settings
*gensec_settings
;
77 struct auth4_context
*auth_context
;
78 struct loadparm_context
*lp_ctx
;
79 struct PAC_DATA_CTR
*pac_data_ctr
= NULL
;
80 char *canon_principal
= NULL
;
81 char *canon_realm
= NULL
;
83 TALLOC_CTX
*tmp_ctx
= talloc_new(mem_ctx
);
84 NT_STATUS_HAVE_NO_MEMORY(tmp_ctx
);
88 ZERO_STRUCT(sesskey1
);
91 status
= NT_STATUS_INVALID_PARAMETER
;
95 if (_canon_principal
!= NULL
) {
96 *_canon_principal
= NULL
;
99 if (_canon_realm
!= NULL
) {
100 *_canon_realm
= NULL
;
107 if (!strchr_m(name
, '@')) {
108 auth_princ
= talloc_asprintf(mem_ctx
, "%s@%s", name
,
113 NT_STATUS_HAVE_NO_MEMORY(auth_princ
);
115 ret
= kerberos_kinit_password_ext(auth_princ
,
129 DEBUG(1,("kinit failed for '%s' with: %s (%d)\n",
130 auth_princ
, error_message(ret
), ret
));
131 /* status already set */
135 DEBUG(10,("got TGT for %s in %s\n", auth_princ
, cc
));
137 DEBUGADD(10,("\tvalid until: %s (%d)\n",
138 http_timestring(talloc_tos(), *expire_time
),
141 if (renew_till_time
) {
142 DEBUGADD(10,("\trenewable till: %s (%d)\n",
143 http_timestring(talloc_tos(), *renew_till_time
),
144 (int)*renew_till_time
));
147 /* we cannot continue with krb5 when UF_DONT_REQUIRE_PREAUTH is set,
148 * in that case fallback to NTLM - gd */
150 if (expire_time
&& renew_till_time
&&
151 (*expire_time
== 0) && (*renew_till_time
== 0)) {
152 status
= NT_STATUS_INVALID_LOGON_TYPE
;
156 ret
= ads_krb5_cli_get_ticket(mem_ctx
,
164 impersonate_princ_s
);
166 DEBUG(1,("failed to get ticket for %s: %s\n",
167 local_service
, error_message(ret
)));
168 if (impersonate_princ_s
) {
169 DEBUGADD(1,("tried S4U2SELF impersonation as: %s\n",
170 impersonate_princ_s
));
172 status
= krb5_to_nt_status(ret
);
176 /* wrap that up in a nice GSS-API wrapping */
177 tkt_wrapped
= spnego_gen_krb5_wrap(tmp_ctx
, tkt
, TOK_ID_KRB_AP_REQ
);
178 if (tkt_wrapped
.data
== NULL
) {
179 status
= NT_STATUS_NO_MEMORY
;
183 auth_context
= auth4_context_for_PAC_DATA_CTR(tmp_ctx
);
184 if (auth_context
== NULL
) {
185 status
= NT_STATUS_NO_MEMORY
;
189 lp_ctx
= loadparm_init_s3(tmp_ctx
, loadparm_s3_helpers());
190 if (lp_ctx
== NULL
) {
191 status
= NT_STATUS_INVALID_SERVER_STATE
;
192 DEBUG(10, ("loadparm_init_s3 failed\n"));
196 gensec_settings
= lpcfg_gensec_settings(tmp_ctx
, lp_ctx
);
197 if (gensec_settings
== NULL
) {
198 status
= NT_STATUS_NO_MEMORY
;
199 DEBUG(10, ("lpcfg_gensec_settings failed\n"));
203 backends
= talloc_zero_array(gensec_settings
,
204 const struct gensec_security_ops
*, 2);
205 if (backends
== NULL
) {
206 status
= NT_STATUS_NO_MEMORY
;
209 gensec_settings
->backends
= backends
;
213 backends
[idx
++] = &gensec_gse_krb5_security_ops
;
215 status
= gensec_server_start(tmp_ctx
, gensec_settings
,
216 auth_context
, &gensec_server_context
);
218 if (!NT_STATUS_IS_OK(status
)) {
219 DEBUG(1, (__location__
"Failed to start server-side GENSEC to validate a Kerberos ticket: %s\n", nt_errstr(status
)));
223 talloc_unlink(tmp_ctx
, lp_ctx
);
224 talloc_unlink(tmp_ctx
, gensec_settings
);
225 talloc_unlink(tmp_ctx
, auth_context
);
227 /* Session info is not complete, do not pass to auth log */
228 gensec_want_feature(gensec_server_context
, GENSEC_FEATURE_NO_AUTHZ_LOG
);
230 status
= gensec_start_mech_by_oid(gensec_server_context
, GENSEC_OID_KERBEROS5
);
231 if (!NT_STATUS_IS_OK(status
)) {
232 DEBUG(1, (__location__
"Failed to start server-side GENSEC krb5 to validate a Kerberos ticket: %s\n", nt_errstr(status
)));
236 /* Do a client-server update dance */
237 status
= gensec_update(gensec_server_context
, tmp_ctx
, tkt_wrapped
, &ap_rep
);
238 if (!NT_STATUS_IS_OK(status
)) {
239 DEBUG(1, ("gensec_update() failed: %s\n", nt_errstr(status
)));
243 /* Now return the PAC information to the callers. We ingore
244 * the session_info and instead pick out the PAC via the
245 * private_data on the auth_context */
246 status
= gensec_session_info(gensec_server_context
, tmp_ctx
, &session_info
);
247 if (!NT_STATUS_IS_OK(status
)) {
248 DEBUG(1, ("Unable to obtain PAC via gensec_session_info\n"));
252 pac_data_ctr
= auth4_context_get_PAC_DATA_CTR(auth_context
, mem_ctx
);
253 if (pac_data_ctr
== NULL
) {
254 DEBUG(1,("no PAC\n"));
255 status
= NT_STATUS_INVALID_PARAMETER
;
259 *_pac_data_ctr
= talloc_move(mem_ctx
, &pac_data_ctr
);
260 if (_canon_principal
!= NULL
) {
261 *_canon_principal
= talloc_move(mem_ctx
, &canon_principal
);
263 if (_canon_realm
!= NULL
) {
264 *_canon_realm
= talloc_move(mem_ctx
, &canon_realm
);
268 talloc_free(tmp_ctx
);
269 if (cc
!= cache_name
) {
273 data_blob_free(&tkt
);
274 data_blob_free(&ap_rep
);
275 data_blob_free(&sesskey1
);