2 Unix SMB/CIFS implementation.
3 Wrapper for krb5_init_context
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
6 Copyright (C) Andrew Tridgell 2005
7 Copyright (C) Stefan Metzmacher 2004
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 "system/kerberos.h"
26 #include "auth/kerberos/kerberos.h"
27 #include "lib/socket/socket.h"
28 #include "lib/stream/packet.h"
29 #include "system/network.h"
30 #include "param/param.h"
31 #include "libcli/resolve/resolve.h"
34 context structure for operations on cldap packets
36 struct smb_krb5_socket
{
37 struct socket_context
*sock
;
40 struct tevent_fd
*fde
;
43 DATA_BLOB request
, reply
;
45 struct packet_context
*packet
;
52 static krb5_error_code
smb_krb5_context_destroy(struct smb_krb5_context
*ctx
)
54 /* Otherwise krb5_free_context will try and close what we have already free()ed */
55 krb5_set_warn_dest(ctx
->krb5_context
, NULL
);
56 krb5_closelog(ctx
->krb5_context
, ctx
->logf
);
57 krb5_free_context(ctx
->krb5_context
);
61 /* We never close down the DEBUG system, and no need to unreference the use */
62 static void smb_krb5_debug_close(void *private_data
) {
66 static void smb_krb5_debug_wrapper(const char *timestr
, const char *msg
, void *private_data
)
68 DEBUG(3, ("Kerberos: %s\n", msg
));
72 handle recv events on a smb_krb5 socket
74 static void smb_krb5_socket_recv(struct smb_krb5_socket
*smb_krb5
)
76 TALLOC_CTX
*tmp_ctx
= talloc_new(smb_krb5
);
80 smb_krb5
->status
= socket_pending(smb_krb5
->sock
, &dsize
);
81 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
86 blob
= data_blob_talloc(tmp_ctx
, NULL
, dsize
);
87 if (blob
.data
== NULL
&& dsize
!= 0) {
88 smb_krb5
->status
= NT_STATUS_NO_MEMORY
;
93 smb_krb5
->status
= socket_recv(smb_krb5
->sock
, blob
.data
, blob
.length
, &nread
);
94 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
101 smb_krb5
->status
= NT_STATUS_UNEXPECTED_NETWORK_ERROR
;
102 talloc_free(tmp_ctx
);
106 DEBUG(2,("Received smb_krb5 packet of length %d\n",
109 talloc_steal(smb_krb5
, blob
.data
);
110 smb_krb5
->reply
= blob
;
111 talloc_free(tmp_ctx
);
114 static NTSTATUS
smb_krb5_full_packet(void *private_data
, DATA_BLOB data
)
116 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private_data
, struct smb_krb5_socket
);
117 talloc_steal(smb_krb5
, data
.data
);
118 smb_krb5
->reply
= data
;
119 smb_krb5
->reply
.length
-= 4;
120 smb_krb5
->reply
.data
+= 4;
125 handle request timeouts
127 static void smb_krb5_request_timeout(struct tevent_context
*event_ctx
,
128 struct tevent_timer
*te
, struct timeval t
,
131 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private_data
, struct smb_krb5_socket
);
132 DEBUG(5,("Timed out smb_krb5 packet\n"));
133 smb_krb5
->status
= NT_STATUS_IO_TIMEOUT
;
136 static void smb_krb5_error_handler(void *private_data
, NTSTATUS status
)
138 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private_data
, struct smb_krb5_socket
);
139 smb_krb5
->status
= status
;
143 handle send events on a smb_krb5 socket
145 static void smb_krb5_socket_send(struct smb_krb5_socket
*smb_krb5
)
151 len
= smb_krb5
->request
.length
;
152 status
= socket_send(smb_krb5
->sock
, &smb_krb5
->request
, &len
);
154 if (!NT_STATUS_IS_OK(status
)) return;
156 TEVENT_FD_READABLE(smb_krb5
->fde
);
158 TEVENT_FD_NOT_WRITEABLE(smb_krb5
->fde
);
164 handle fd events on a smb_krb5_socket
166 static void smb_krb5_socket_handler(struct tevent_context
*ev
, struct tevent_fd
*fde
,
167 uint16_t flags
, void *private_data
)
169 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private_data
, struct smb_krb5_socket
);
170 switch (smb_krb5
->hi
->proto
) {
171 case KRB5_KRBHST_UDP
:
172 if (flags
& TEVENT_FD_READ
) {
173 smb_krb5_socket_recv(smb_krb5
);
176 if (flags
& TEVENT_FD_WRITE
) {
177 smb_krb5_socket_send(smb_krb5
);
182 case KRB5_KRBHST_TCP
:
183 if (flags
& TEVENT_FD_READ
) {
184 packet_recv(smb_krb5
->packet
);
187 if (flags
& TEVENT_FD_WRITE
) {
188 packet_queue_run(smb_krb5
->packet
);
193 case KRB5_KRBHST_HTTP
:
200 krb5_error_code
smb_krb5_send_and_recv_func(krb5_context context
,
202 krb5_krbhst_info
*hi
,
204 const krb5_data
*send_buf
,
209 struct socket_address
*remote_addr
;
211 struct addrinfo
*ai
, *a
;
212 struct smb_krb5_socket
*smb_krb5
;
214 struct tevent_context
*ev
= talloc_get_type(data
, struct tevent_context
);
216 DATA_BLOB send_blob
= data_blob_const(send_buf
->data
, send_buf
->length
);
218 ret
= krb5_krbhst_get_addrinfo(context
, hi
, &ai
);
223 for (a
= ai
; a
; a
= ai
->ai_next
) {
224 smb_krb5
= talloc(NULL
, struct smb_krb5_socket
);
230 switch (a
->ai_family
) {
240 talloc_free(smb_krb5
);
244 status
= NT_STATUS_INVALID_PARAMETER
;
246 case KRB5_KRBHST_UDP
:
247 status
= socket_create(name
, SOCKET_TYPE_DGRAM
, &smb_krb5
->sock
, 0);
249 case KRB5_KRBHST_TCP
:
250 status
= socket_create(name
, SOCKET_TYPE_STREAM
, &smb_krb5
->sock
, 0);
252 case KRB5_KRBHST_HTTP
:
253 talloc_free(smb_krb5
);
256 if (!NT_STATUS_IS_OK(status
)) {
257 talloc_free(smb_krb5
);
261 talloc_steal(smb_krb5
, smb_krb5
->sock
);
263 remote_addr
= socket_address_from_sockaddr(smb_krb5
, a
->ai_addr
, a
->ai_addrlen
);
265 talloc_free(smb_krb5
);
269 status
= socket_connect_ev(smb_krb5
->sock
, NULL
, remote_addr
, 0, ev
);
270 if (!NT_STATUS_IS_OK(status
)) {
271 talloc_free(smb_krb5
);
274 talloc_free(remote_addr
);
276 /* Setup the FDE, start listening for read events
277 * from the start (otherwise we may miss a socket
278 * drop) and mark as AUTOCLOSE along with the fde */
280 /* Ths is equivilant to EVENT_FD_READABLE(smb_krb5->fde) */
281 smb_krb5
->fde
= tevent_add_fd(ev
, smb_krb5
->sock
,
282 socket_get_fd(smb_krb5
->sock
),
284 smb_krb5_socket_handler
, smb_krb5
);
285 /* its now the job of the event layer to close the socket */
286 tevent_fd_set_close_fn(smb_krb5
->fde
, socket_tevent_fd_close_fn
);
287 socket_set_flags(smb_krb5
->sock
, SOCKET_FLAG_NOCLOSE
);
289 tevent_add_timer(ev
, smb_krb5
,
290 timeval_current_ofs(timeout
, 0),
291 smb_krb5_request_timeout
, smb_krb5
);
293 smb_krb5
->status
= NT_STATUS_OK
;
294 smb_krb5
->reply
= data_blob(NULL
, 0);
297 case KRB5_KRBHST_UDP
:
298 TEVENT_FD_WRITEABLE(smb_krb5
->fde
);
299 smb_krb5
->request
= send_blob
;
301 case KRB5_KRBHST_TCP
:
303 smb_krb5
->packet
= packet_init(smb_krb5
);
304 if (smb_krb5
->packet
== NULL
) {
305 talloc_free(smb_krb5
);
308 packet_set_private(smb_krb5
->packet
, smb_krb5
);
309 packet_set_socket(smb_krb5
->packet
, smb_krb5
->sock
);
310 packet_set_callback(smb_krb5
->packet
, smb_krb5_full_packet
);
311 packet_set_full_request(smb_krb5
->packet
, packet_full_request_u32
);
312 packet_set_error_handler(smb_krb5
->packet
, smb_krb5_error_handler
);
313 packet_set_event_context(smb_krb5
->packet
, ev
);
314 packet_set_fde(smb_krb5
->packet
, smb_krb5
->fde
);
316 smb_krb5
->request
= data_blob_talloc(smb_krb5
, NULL
, send_blob
.length
+ 4);
317 RSIVAL(smb_krb5
->request
.data
, 0, send_blob
.length
);
318 memcpy(smb_krb5
->request
.data
+4, send_blob
.data
, send_blob
.length
);
319 packet_send(smb_krb5
->packet
, smb_krb5
->request
);
321 case KRB5_KRBHST_HTTP
:
322 talloc_free(smb_krb5
);
325 while ((NT_STATUS_IS_OK(smb_krb5
->status
)) && !smb_krb5
->reply
.length
) {
326 if (tevent_loop_once(ev
) != 0) {
327 talloc_free(smb_krb5
);
331 if (NT_STATUS_EQUAL(smb_krb5
->status
, NT_STATUS_IO_TIMEOUT
)) {
332 talloc_free(smb_krb5
);
336 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
337 DEBUG(2,("Error reading smb_krb5 reply packet: %s\n", nt_errstr(smb_krb5
->status
)));
338 talloc_free(smb_krb5
);
342 ret
= krb5_data_copy(recv_buf
, smb_krb5
->reply
.data
, smb_krb5
->reply
.length
);
344 talloc_free(smb_krb5
);
347 talloc_free(smb_krb5
);
354 return KRB5_KDC_UNREACH
;
358 smb_krb5_init_context_basic(TALLOC_CTX
*tmp_ctx
,
359 struct tevent_context
*ev
,
360 struct loadparm_context
*lp_ctx
,
361 krb5_context
*_krb5_context
)
365 const char *config_file
, *realm
;
366 krb5_context krb5_ctx
;
368 initialize_krb5_error_table();
370 ret
= krb5_init_context(&krb5_ctx
);
372 DEBUG(1,("krb5_init_context failed (%s)\n",
373 error_message(ret
)));
377 config_file
= config_path(tmp_ctx
, lp_ctx
, "krb5.conf");
379 krb5_free_context(krb5_ctx
);
383 /* Use our local krb5.conf file by default */
384 ret
= krb5_prepend_config_files_default(config_file
== NULL
?"":config_file
, &config_files
);
386 DEBUG(1,("krb5_prepend_config_files_default failed (%s)\n",
387 smb_get_krb5_error_message(krb5_ctx
, ret
, tmp_ctx
)));
388 krb5_free_context(krb5_ctx
);
392 ret
= krb5_set_config_files(krb5_ctx
, config_files
);
393 krb5_free_config_files(config_files
);
395 DEBUG(1,("krb5_set_config_files failed (%s)\n",
396 smb_get_krb5_error_message(krb5_ctx
, ret
, tmp_ctx
)));
397 krb5_free_context(krb5_ctx
);
401 realm
= lp_realm(lp_ctx
);
403 ret
= krb5_set_default_realm(krb5_ctx
, realm
);
405 DEBUG(1,("krb5_set_default_realm failed (%s)\n",
406 smb_get_krb5_error_message(krb5_ctx
, ret
, tmp_ctx
)));
407 krb5_free_context(krb5_ctx
);
412 *_krb5_context
= krb5_ctx
;
416 krb5_error_code
smb_krb5_init_context(void *parent_ctx
,
417 struct tevent_context
*ev
,
418 struct loadparm_context
*lp_ctx
,
419 struct smb_krb5_context
**smb_krb5_context
)
424 initialize_krb5_error_table();
426 tmp_ctx
= talloc_new(parent_ctx
);
427 *smb_krb5_context
= talloc(tmp_ctx
, struct smb_krb5_context
);
429 if (!*smb_krb5_context
|| !tmp_ctx
) {
430 talloc_free(tmp_ctx
);
434 ret
= smb_krb5_init_context_basic(tmp_ctx
, ev
, lp_ctx
,
435 &(*smb_krb5_context
)->krb5_context
);
437 DEBUG(1,("smb_krb5_context_init_basic failed (%s)\n",
438 error_message(ret
)));
439 talloc_free(tmp_ctx
);
443 /* TODO: Should we have a different name here? */
444 ret
= krb5_initlog((*smb_krb5_context
)->krb5_context
, "Samba", &(*smb_krb5_context
)->logf
);
447 DEBUG(1,("krb5_initlog failed (%s)\n",
448 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
449 krb5_free_context((*smb_krb5_context
)->krb5_context
);
450 talloc_free(tmp_ctx
);
454 talloc_set_destructor(*smb_krb5_context
, smb_krb5_context_destroy
);
456 ret
= krb5_addlog_func((*smb_krb5_context
)->krb5_context
, (*smb_krb5_context
)->logf
, 0 /* min */, -1 /* max */,
457 smb_krb5_debug_wrapper
, smb_krb5_debug_close
, NULL
);
459 DEBUG(1,("krb5_addlog_func failed (%s)\n",
460 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
461 talloc_free(tmp_ctx
);
464 krb5_set_warn_dest((*smb_krb5_context
)->krb5_context
, (*smb_krb5_context
)->logf
);
466 /* Set use of our socket lib */
467 ret
= krb5_set_send_to_kdc_func((*smb_krb5_context
)->krb5_context
,
468 smb_krb5_send_and_recv_func
,
471 DEBUG(1,("krb5_set_send_recv_func failed (%s)\n",
472 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
473 talloc_free(tmp_ctx
);
477 talloc_steal(parent_ctx
, *smb_krb5_context
);
478 talloc_free(tmp_ctx
);
480 /* Set options in kerberos */
482 krb5_set_dns_canonicalize_hostname((*smb_krb5_context
)->krb5_context
,
483 lp_parm_bool(lp_ctx
, NULL
, "krb5", "set_dns_canonicalize", false));