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"
25 #include "heimdal/lib/krb5/krb5_locl.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 "lib/events/events.h"
32 #include "param/param.h"
33 #include "libcli/resolve/resolve.h"
36 context structure for operations on cldap packets
38 struct smb_krb5_socket
{
39 struct socket_context
*sock
;
45 DATA_BLOB request
, reply
;
47 struct packet_context
*packet
;
54 static int smb_krb5_context_destroy_1(struct smb_krb5_context
*ctx
)
56 krb5_free_context(ctx
->krb5_context
);
60 static int smb_krb5_context_destroy_2(struct smb_krb5_context
*ctx
)
62 /* Otherwise krb5_free_context will try and close what we have already free()ed */
63 krb5_set_warn_dest(ctx
->krb5_context
, NULL
);
64 krb5_closelog(ctx
->krb5_context
, ctx
->logf
);
65 smb_krb5_context_destroy_1(ctx
);
69 /* We never close down the DEBUG system, and no need to unreference the use */
70 static void smb_krb5_debug_close(void *private) {
74 static void smb_krb5_debug_wrapper(const char *timestr
, const char *msg
, void *private)
76 DEBUG(2, ("Kerberos: %s\n", msg
));
80 handle recv events on a smb_krb5 socket
82 static void smb_krb5_socket_recv(struct smb_krb5_socket
*smb_krb5
)
84 TALLOC_CTX
*tmp_ctx
= talloc_new(smb_krb5
);
88 smb_krb5
->status
= socket_pending(smb_krb5
->sock
, &dsize
);
89 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
94 blob
= data_blob_talloc(tmp_ctx
, NULL
, dsize
);
95 if (blob
.data
== NULL
&& dsize
!= 0) {
96 smb_krb5
->status
= NT_STATUS_NO_MEMORY
;
101 smb_krb5
->status
= socket_recv(smb_krb5
->sock
, blob
.data
, blob
.length
, &nread
);
102 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
103 talloc_free(tmp_ctx
);
109 smb_krb5
->status
= NT_STATUS_UNEXPECTED_NETWORK_ERROR
;
110 talloc_free(tmp_ctx
);
114 DEBUG(2,("Received smb_krb5 packet of length %d\n",
117 talloc_steal(smb_krb5
, blob
.data
);
118 smb_krb5
->reply
= blob
;
119 talloc_free(tmp_ctx
);
122 static NTSTATUS
smb_krb5_full_packet(void *private, DATA_BLOB data
)
124 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private, struct smb_krb5_socket
);
125 talloc_steal(smb_krb5
, data
.data
);
126 smb_krb5
->reply
= data
;
127 smb_krb5
->reply
.length
-= 4;
128 smb_krb5
->reply
.data
+= 4;
133 handle request timeouts
135 static void smb_krb5_request_timeout(struct event_context
*event_ctx
,
136 struct timed_event
*te
, struct timeval t
,
139 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private, struct smb_krb5_socket
);
140 DEBUG(5,("Timed out smb_krb5 packet\n"));
141 smb_krb5
->status
= NT_STATUS_IO_TIMEOUT
;
144 static void smb_krb5_error_handler(void *private, NTSTATUS status
)
146 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private, struct smb_krb5_socket
);
147 smb_krb5
->status
= status
;
151 handle send events on a smb_krb5 socket
153 static void smb_krb5_socket_send(struct smb_krb5_socket
*smb_krb5
)
159 len
= smb_krb5
->request
.length
;
160 status
= socket_send(smb_krb5
->sock
, &smb_krb5
->request
, &len
);
162 if (!NT_STATUS_IS_OK(status
)) return;
164 EVENT_FD_READABLE(smb_krb5
->fde
);
166 EVENT_FD_NOT_WRITEABLE(smb_krb5
->fde
);
172 handle fd events on a smb_krb5_socket
174 static void smb_krb5_socket_handler(struct event_context
*ev
, struct fd_event
*fde
,
175 uint16_t flags
, void *private)
177 struct smb_krb5_socket
*smb_krb5
= talloc_get_type(private, struct smb_krb5_socket
);
178 switch (smb_krb5
->hi
->proto
) {
179 case KRB5_KRBHST_UDP
:
180 if (flags
& EVENT_FD_READ
) {
181 smb_krb5_socket_recv(smb_krb5
);
184 if (flags
& EVENT_FD_WRITE
) {
185 smb_krb5_socket_send(smb_krb5
);
190 case KRB5_KRBHST_TCP
:
191 if (flags
& EVENT_FD_READ
) {
192 packet_recv(smb_krb5
->packet
);
195 if (flags
& EVENT_FD_WRITE
) {
196 packet_queue_run(smb_krb5
->packet
);
201 case KRB5_KRBHST_HTTP
:
208 krb5_error_code
smb_krb5_send_and_recv_func(krb5_context context
,
210 krb5_krbhst_info
*hi
,
212 const krb5_data
*send_buf
,
217 struct socket_address
*remote_addr
;
219 struct addrinfo
*ai
, *a
;
220 struct smb_krb5_socket
*smb_krb5
;
222 struct event_context
*ev
= talloc_get_type(data
, struct event_context
);
224 DATA_BLOB send_blob
= data_blob_const(send_buf
->data
, send_buf
->length
);
226 ret
= krb5_krbhst_get_addrinfo(context
, hi
, &ai
);
231 for (a
= ai
; a
; a
= ai
->ai_next
) {
232 smb_krb5
= talloc(NULL
, struct smb_krb5_socket
);
238 switch (a
->ai_family
) {
248 talloc_free(smb_krb5
);
252 status
= NT_STATUS_INVALID_PARAMETER
;
254 case KRB5_KRBHST_UDP
:
255 if (lp_parm_bool(global_loadparm
, NULL
, "krb5", "udp", true)) {
256 status
= socket_create(name
, SOCKET_TYPE_DGRAM
, &smb_krb5
->sock
, 0);
259 case KRB5_KRBHST_TCP
:
260 if (lp_parm_bool(global_loadparm
, NULL
, "krb5", "tcp", true)) {
261 status
= socket_create(name
, SOCKET_TYPE_STREAM
, &smb_krb5
->sock
, 0);
264 case KRB5_KRBHST_HTTP
:
265 talloc_free(smb_krb5
);
268 if (!NT_STATUS_IS_OK(status
)) {
269 talloc_free(smb_krb5
);
273 talloc_steal(smb_krb5
, smb_krb5
->sock
);
275 remote_addr
= socket_address_from_sockaddr(smb_krb5
, a
->ai_addr
, a
->ai_addrlen
);
277 talloc_free(smb_krb5
);
281 status
= socket_connect_ev(smb_krb5
->sock
, NULL
, remote_addr
, 0,
283 if (!NT_STATUS_IS_OK(status
)) {
284 talloc_free(smb_krb5
);
287 talloc_free(remote_addr
);
289 /* Setup the FDE, start listening for read events
290 * from the start (otherwise we may miss a socket
291 * drop) and mark as AUTOCLOSE along with the fde */
293 /* Ths is equivilant to EVENT_FD_READABLE(smb_krb5->fde) */
294 smb_krb5
->fde
= event_add_fd(ev
, smb_krb5
->sock
,
295 socket_get_fd(smb_krb5
->sock
),
296 EVENT_FD_READ
|EVENT_FD_AUTOCLOSE
,
297 smb_krb5_socket_handler
, smb_krb5
);
298 /* its now the job of the event layer to close the socket */
299 socket_set_flags(smb_krb5
->sock
, SOCKET_FLAG_NOCLOSE
);
301 event_add_timed(ev
, smb_krb5
,
302 timeval_current_ofs(timeout
, 0),
303 smb_krb5_request_timeout
, smb_krb5
);
306 smb_krb5
->status
= NT_STATUS_OK
;
307 smb_krb5
->reply
= data_blob(NULL
, 0);
310 case KRB5_KRBHST_UDP
:
311 EVENT_FD_WRITEABLE(smb_krb5
->fde
);
312 smb_krb5
->request
= send_blob
;
314 case KRB5_KRBHST_TCP
:
316 smb_krb5
->packet
= packet_init(smb_krb5
);
317 if (smb_krb5
->packet
== NULL
) {
318 talloc_free(smb_krb5
);
321 packet_set_private(smb_krb5
->packet
, smb_krb5
);
322 packet_set_socket(smb_krb5
->packet
, smb_krb5
->sock
);
323 packet_set_callback(smb_krb5
->packet
, smb_krb5_full_packet
);
324 packet_set_full_request(smb_krb5
->packet
, packet_full_request_u32
);
325 packet_set_error_handler(smb_krb5
->packet
, smb_krb5_error_handler
);
326 packet_set_event_context(smb_krb5
->packet
, ev
);
327 packet_set_fde(smb_krb5
->packet
, smb_krb5
->fde
);
329 smb_krb5
->request
= data_blob_talloc(smb_krb5
, NULL
, send_blob
.length
+ 4);
330 RSIVAL(smb_krb5
->request
.data
, 0, send_blob
.length
);
331 memcpy(smb_krb5
->request
.data
+4, send_blob
.data
, send_blob
.length
);
332 packet_send(smb_krb5
->packet
, smb_krb5
->request
);
334 case KRB5_KRBHST_HTTP
:
335 talloc_free(smb_krb5
);
338 while ((NT_STATUS_IS_OK(smb_krb5
->status
)) && !smb_krb5
->reply
.length
) {
339 if (event_loop_once(ev
) != 0) {
340 talloc_free(smb_krb5
);
344 if (NT_STATUS_EQUAL(smb_krb5
->status
, NT_STATUS_IO_TIMEOUT
)) {
345 talloc_free(smb_krb5
);
349 if (!NT_STATUS_IS_OK(smb_krb5
->status
)) {
350 DEBUG(2,("Error reading smb_krb5 reply packet: %s\n", nt_errstr(smb_krb5
->status
)));
351 talloc_free(smb_krb5
);
355 ret
= krb5_data_copy(recv_buf
, smb_krb5
->reply
.data
, smb_krb5
->reply
.length
);
357 talloc_free(smb_krb5
);
360 talloc_free(smb_krb5
);
367 return KRB5_KDC_UNREACH
;
370 krb5_error_code
smb_krb5_init_context(void *parent_ctx
,
371 struct event_context
*ev
,
372 struct loadparm_context
*lp_ctx
,
373 struct smb_krb5_context
**smb_krb5_context
)
378 const char *config_file
;
380 initialize_krb5_error_table();
382 tmp_ctx
= talloc_new(parent_ctx
);
383 *smb_krb5_context
= talloc(tmp_ctx
, struct smb_krb5_context
);
385 if (!*smb_krb5_context
|| !tmp_ctx
) {
386 talloc_free(tmp_ctx
);
390 ret
= krb5_init_context(&(*smb_krb5_context
)->krb5_context
);
392 DEBUG(1,("krb5_init_context failed (%s)\n",
393 error_message(ret
)));
394 talloc_free(tmp_ctx
);
398 talloc_set_destructor(*smb_krb5_context
, smb_krb5_context_destroy_1
);
400 config_file
= config_path(tmp_ctx
, lp_ctx
, "krb5.conf");
402 talloc_free(tmp_ctx
);
406 /* Use our local krb5.conf file by default */
407 ret
= krb5_prepend_config_files_default(config_file
== NULL
?"":config_file
, &config_files
);
409 DEBUG(1,("krb5_prepend_config_files_default failed (%s)\n",
410 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
411 talloc_free(tmp_ctx
);
415 ret
= krb5_set_config_files((*smb_krb5_context
)->krb5_context
,
417 krb5_free_config_files(config_files
);
419 DEBUG(1,("krb5_set_config_files failed (%s)\n",
420 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
421 talloc_free(tmp_ctx
);
425 if (lp_realm(lp_ctx
) && *lp_realm(lp_ctx
)) {
426 char *upper_realm
= strupper_talloc(tmp_ctx
, lp_realm(lp_ctx
));
428 DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm(lp_ctx
)));
429 talloc_free(tmp_ctx
);
432 ret
= krb5_set_default_realm((*smb_krb5_context
)->krb5_context
, upper_realm
);
434 DEBUG(1,("krb5_set_default_realm failed (%s)\n",
435 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
436 talloc_free(tmp_ctx
);
441 /* TODO: Should we have a different name here? */
442 ret
= krb5_initlog((*smb_krb5_context
)->krb5_context
, "Samba", &(*smb_krb5_context
)->logf
);
445 DEBUG(1,("krb5_initlog failed (%s)\n",
446 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
447 talloc_free(tmp_ctx
);
451 talloc_set_destructor(*smb_krb5_context
, smb_krb5_context_destroy_2
);
453 ret
= krb5_addlog_func((*smb_krb5_context
)->krb5_context
, (*smb_krb5_context
)->logf
, 0 /* min */, -1 /* max */,
454 smb_krb5_debug_wrapper
, smb_krb5_debug_close
, NULL
);
456 DEBUG(1,("krb5_addlog_func failed (%s)\n",
457 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
458 talloc_free(tmp_ctx
);
461 krb5_set_warn_dest((*smb_krb5_context
)->krb5_context
, (*smb_krb5_context
)->logf
);
463 /* Set use of our socket lib */
464 ret
= krb5_set_send_to_kdc_func((*smb_krb5_context
)->krb5_context
,
465 smb_krb5_send_and_recv_func
,
468 DEBUG(1,("krb5_set_send_recv_func failed (%s)\n",
469 smb_get_krb5_error_message((*smb_krb5_context
)->krb5_context
, ret
, tmp_ctx
)));
470 talloc_free(tmp_ctx
);
474 talloc_steal(parent_ctx
, *smb_krb5_context
);
475 talloc_free(tmp_ctx
);
477 /* Set options in kerberos */
479 krb5_set_dns_canonicalize_hostname((*smb_krb5_context
)->krb5_context
,
480 lp_parm_bool(lp_ctx
, NULL
, "krb5", "set_dns_canonicalize", false));