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_1(struct smb_krb5_context
*ctx
)
54 krb5_free_context(ctx
->krb5_context
);
58 static krb5_error_code
smb_krb5_context_destroy_2(struct smb_krb5_context
*ctx
)
60 /* Otherwise krb5_free_context will try and close what we have already free()ed */
61 krb5_set_warn_dest(ctx
->krb5_context
, NULL
);
62 krb5_closelog(ctx
->krb5_context
, ctx
->logf
);
63 smb_krb5_context_destroy_1(ctx
);
67 /* We never close down the DEBUG system, and no need to unreference the use */
68 static void smb_krb5_debug_close(void *private_data
) {
72 static void smb_krb5_debug_wrapper(const char *timestr
, const char *msg
, void *private_data
)
74 DEBUG(2, ("Kerberos: %s\n", msg
));
78 handle recv events on a smb_krb5 socket
80 static void smb_krb5_socket_recv(struct smb_krb5_socket
*smb_krb5
)
82 TALLOC_CTX
*tmp_ctx
= talloc_new(smb_krb5
);
86 smb_krb5
->status
= socket_pending(smb_krb5
->sock
, &dsize
);
87 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
92 blob
= data_blob_talloc(tmp_ctx
, NULL
, dsize
);
93 if (blob
.data
== NULL
&& dsize
!= 0) {
94 smb_krb5
->status
= NT_STATUS_NO_MEMORY
;
99 smb_krb5
->status
= socket_recv(smb_krb5
->sock
, blob
.data
, blob
.length
, &nread
);
100 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
101 talloc_free(tmp_ctx
);
107 smb_krb5
->status
= NT_STATUS_UNEXPECTED_NETWORK_ERROR
;
108 talloc_free(tmp_ctx
);
112 DEBUG(2,("Received smb_krb5 packet of length %d\n",
115 talloc_steal(smb_krb5
, blob
.data
);
116 smb_krb5
->reply
= blob
;
117 talloc_free(tmp_ctx
);
120 static NTSTATUS
smb_krb5_full_packet(void *private_data
, DATA_BLOB data
)
122 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private_data
, struct smb_krb5_socket
);
123 talloc_steal(smb_krb5
, data
.data
);
124 smb_krb5
->reply
= data
;
125 smb_krb5
->reply
.length
-= 4;
126 smb_krb5
->reply
.data
+= 4;
131 handle request timeouts
133 static void smb_krb5_request_timeout(struct tevent_context
*event_ctx
,
134 struct tevent_timer
*te
, struct timeval t
,
137 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private_data
, struct smb_krb5_socket
);
138 DEBUG(5,("Timed out smb_krb5 packet\n"));
139 smb_krb5
->status
= NT_STATUS_IO_TIMEOUT
;
142 static void smb_krb5_error_handler(void *private_data
, NTSTATUS status
)
144 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private_data
, struct smb_krb5_socket
);
145 smb_krb5
->status
= status
;
149 handle send events on a smb_krb5 socket
151 static void smb_krb5_socket_send(struct smb_krb5_socket
*smb_krb5
)
157 len
= smb_krb5
->request
.length
;
158 status
= socket_send(smb_krb5
->sock
, &smb_krb5
->request
, &len
);
160 if (!NT_STATUS_IS_OK(status
)) return;
162 TEVENT_FD_READABLE(smb_krb5
->fde
);
164 TEVENT_FD_NOT_WRITEABLE(smb_krb5
->fde
);
170 handle fd events on a smb_krb5_socket
172 static void smb_krb5_socket_handler(struct tevent_context
*ev
, struct tevent_fd
*fde
,
173 uint16_t flags
, void *private_data
)
175 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private_data
, struct smb_krb5_socket
);
176 switch (smb_krb5
->hi
->proto
) {
177 case KRB5_KRBHST_UDP
:
178 if (flags
& TEVENT_FD_READ
) {
179 smb_krb5_socket_recv(smb_krb5
);
182 if (flags
& TEVENT_FD_WRITE
) {
183 smb_krb5_socket_send(smb_krb5
);
188 case KRB5_KRBHST_TCP
:
189 if (flags
& TEVENT_FD_READ
) {
190 packet_recv(smb_krb5
->packet
);
193 if (flags
& TEVENT_FD_WRITE
) {
194 packet_queue_run(smb_krb5
->packet
);
199 case KRB5_KRBHST_HTTP
:
206 krb5_error_code
smb_krb5_send_and_recv_func(krb5_context context
,
208 krb5_krbhst_info
*hi
,
210 const krb5_data
*send_buf
,
215 struct socket_address
*remote_addr
;
217 struct addrinfo
*ai
, *a
;
218 struct smb_krb5_socket
*smb_krb5
;
220 struct tevent_context
*ev
= talloc_get_type(data
, struct tevent_context
);
222 DATA_BLOB send_blob
= data_blob_const(send_buf
->data
, send_buf
->length
);
224 ret
= krb5_krbhst_get_addrinfo(context
, hi
, &ai
);
229 for (a
= ai
; a
; a
= ai
->ai_next
) {
230 smb_krb5
= talloc(NULL
, struct smb_krb5_socket
);
236 switch (a
->ai_family
) {
246 talloc_free(smb_krb5
);
250 status
= NT_STATUS_INVALID_PARAMETER
;
252 case KRB5_KRBHST_UDP
:
253 status
= socket_create(name
, SOCKET_TYPE_DGRAM
, &smb_krb5
->sock
, 0);
255 case KRB5_KRBHST_TCP
:
256 status
= socket_create(name
, SOCKET_TYPE_STREAM
, &smb_krb5
->sock
, 0);
258 case KRB5_KRBHST_HTTP
:
259 talloc_free(smb_krb5
);
262 if (!NT_STATUS_IS_OK(status
)) {
263 talloc_free(smb_krb5
);
267 talloc_steal(smb_krb5
, smb_krb5
->sock
);
269 remote_addr
= socket_address_from_sockaddr(smb_krb5
, a
->ai_addr
, a
->ai_addrlen
);
271 talloc_free(smb_krb5
);
275 status
= socket_connect_ev(smb_krb5
->sock
, NULL
, remote_addr
, 0, ev
);
276 if (!NT_STATUS_IS_OK(status
)) {
277 talloc_free(smb_krb5
);
280 talloc_free(remote_addr
);
282 /* Setup the FDE, start listening for read events
283 * from the start (otherwise we may miss a socket
284 * drop) and mark as AUTOCLOSE along with the fde */
286 /* Ths is equivilant to EVENT_FD_READABLE(smb_krb5->fde) */
287 smb_krb5
->fde
= tevent_add_fd(ev
, smb_krb5
->sock
,
288 socket_get_fd(smb_krb5
->sock
),
290 smb_krb5_socket_handler
, smb_krb5
);
291 /* its now the job of the event layer to close the socket */
292 tevent_fd_set_close_fn(smb_krb5
->fde
, socket_tevent_fd_close_fn
);
293 socket_set_flags(smb_krb5
->sock
, SOCKET_FLAG_NOCLOSE
);
295 tevent_add_timer(ev
, smb_krb5
,
296 timeval_current_ofs(timeout
, 0),
297 smb_krb5_request_timeout
, smb_krb5
);
299 smb_krb5
->status
= NT_STATUS_OK
;
300 smb_krb5
->reply
= data_blob(NULL
, 0);
303 case KRB5_KRBHST_UDP
:
304 TEVENT_FD_WRITEABLE(smb_krb5
->fde
);
305 smb_krb5
->request
= send_blob
;
307 case KRB5_KRBHST_TCP
:
309 smb_krb5
->packet
= packet_init(smb_krb5
);
310 if (smb_krb5
->packet
== NULL
) {
311 talloc_free(smb_krb5
);
314 packet_set_private(smb_krb5
->packet
, smb_krb5
);
315 packet_set_socket(smb_krb5
->packet
, smb_krb5
->sock
);
316 packet_set_callback(smb_krb5
->packet
, smb_krb5_full_packet
);
317 packet_set_full_request(smb_krb5
->packet
, packet_full_request_u32
);
318 packet_set_error_handler(smb_krb5
->packet
, smb_krb5_error_handler
);
319 packet_set_event_context(smb_krb5
->packet
, ev
);
320 packet_set_fde(smb_krb5
->packet
, smb_krb5
->fde
);
322 smb_krb5
->request
= data_blob_talloc(smb_krb5
, NULL
, send_blob
.length
+ 4);
323 RSIVAL(smb_krb5
->request
.data
, 0, send_blob
.length
);
324 memcpy(smb_krb5
->request
.data
+4, send_blob
.data
, send_blob
.length
);
325 packet_send(smb_krb5
->packet
, smb_krb5
->request
);
327 case KRB5_KRBHST_HTTP
:
328 talloc_free(smb_krb5
);
331 while ((NT_STATUS_IS_OK(smb_krb5
->status
)) && !smb_krb5
->reply
.length
) {
332 if (tevent_loop_once(ev
) != 0) {
333 talloc_free(smb_krb5
);
337 if (NT_STATUS_EQUAL(smb_krb5
->status
, NT_STATUS_IO_TIMEOUT
)) {
338 talloc_free(smb_krb5
);
342 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
343 DEBUG(2,("Error reading smb_krb5 reply packet: %s\n", nt_errstr(smb_krb5
->status
)));
344 talloc_free(smb_krb5
);
348 ret
= krb5_data_copy(recv_buf
, smb_krb5
->reply
.data
, smb_krb5
->reply
.length
);
350 talloc_free(smb_krb5
);
353 talloc_free(smb_krb5
);
360 return KRB5_KDC_UNREACH
;
363 krb5_error_code
smb_krb5_init_context(void *parent_ctx
,
364 struct tevent_context
*ev
,
365 struct loadparm_context
*lp_ctx
,
366 struct smb_krb5_context
**smb_krb5_context
)
371 const char *config_file
;
373 initialize_krb5_error_table();
375 tmp_ctx
= talloc_new(parent_ctx
);
376 *smb_krb5_context
= talloc(tmp_ctx
, struct smb_krb5_context
);
378 if (!*smb_krb5_context
|| !tmp_ctx
) {
379 talloc_free(tmp_ctx
);
383 ret
= krb5_init_context(&(*smb_krb5_context
)->krb5_context
);
385 DEBUG(1,("krb5_init_context failed (%s)\n",
386 error_message(ret
)));
387 talloc_free(tmp_ctx
);
391 talloc_set_destructor(*smb_krb5_context
, smb_krb5_context_destroy_1
);
393 config_file
= config_path(tmp_ctx
, lp_ctx
, "krb5.conf");
395 talloc_free(tmp_ctx
);
399 /* Use our local krb5.conf file by default */
400 ret
= krb5_prepend_config_files_default(config_file
== NULL
?"":config_file
, &config_files
);
402 DEBUG(1,("krb5_prepend_config_files_default failed (%s)\n",
403 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
404 talloc_free(tmp_ctx
);
408 ret
= krb5_set_config_files((*smb_krb5_context
)->krb5_context
,
410 krb5_free_config_files(config_files
);
412 DEBUG(1,("krb5_set_config_files failed (%s)\n",
413 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
414 talloc_free(tmp_ctx
);
418 if (lp_realm(lp_ctx
) && *lp_realm(lp_ctx
)) {
419 char *upper_realm
= strupper_talloc(tmp_ctx
, lp_realm(lp_ctx
));
421 DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm(lp_ctx
)));
422 talloc_free(tmp_ctx
);
425 ret
= krb5_set_default_realm((*smb_krb5_context
)->krb5_context
, upper_realm
);
427 DEBUG(1,("krb5_set_default_realm failed (%s)\n",
428 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
429 talloc_free(tmp_ctx
);
434 /* TODO: Should we have a different name here? */
435 ret
= krb5_initlog((*smb_krb5_context
)->krb5_context
, "Samba", &(*smb_krb5_context
)->logf
);
438 DEBUG(1,("krb5_initlog failed (%s)\n",
439 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
440 talloc_free(tmp_ctx
);
444 talloc_set_destructor(*smb_krb5_context
, smb_krb5_context_destroy_2
);
446 ret
= krb5_addlog_func((*smb_krb5_context
)->krb5_context
, (*smb_krb5_context
)->logf
, 0 /* min */, -1 /* max */,
447 smb_krb5_debug_wrapper
, smb_krb5_debug_close
, NULL
);
449 DEBUG(1,("krb5_addlog_func failed (%s)\n",
450 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
451 talloc_free(tmp_ctx
);
454 krb5_set_warn_dest((*smb_krb5_context
)->krb5_context
, (*smb_krb5_context
)->logf
);
456 /* Set use of our socket lib */
457 ret
= krb5_set_send_to_kdc_func((*smb_krb5_context
)->krb5_context
,
458 smb_krb5_send_and_recv_func
,
461 DEBUG(1,("krb5_set_send_recv_func failed (%s)\n",
462 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
463 talloc_free(tmp_ctx
);
467 talloc_steal(parent_ctx
, *smb_krb5_context
);
468 talloc_free(tmp_ctx
);
470 /* Set options in kerberos */
472 krb5_set_dns_canonicalize_hostname((*smb_krb5_context
)->krb5_context
,
473 lp_parm_bool(lp_ctx
, NULL
, "krb5", "set_dns_canonicalize", false));