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"
35 context structure for operations on cldap packets
37 struct smb_krb5_socket {
38 struct socket_context *sock;
44 DATA_BLOB request, reply;
46 struct packet_context *packet;
53 static int smb_krb5_context_destroy_1(struct smb_krb5_context *ctx)
55 krb5_free_context(ctx->krb5_context);
59 static int smb_krb5_context_destroy_2(struct smb_krb5_context *ctx)
61 /* Otherwise krb5_free_context will try and close what we have already free()ed */
62 krb5_set_warn_dest(ctx->krb5_context, NULL);
63 krb5_closelog(ctx->krb5_context, ctx->logf);
64 smb_krb5_context_destroy_1(ctx);
68 /* We never close down the DEBUG system, and no need to unreference the use */
69 static void smb_krb5_debug_close(void *private) {
73 static void smb_krb5_debug_wrapper(const char *timestr, const char *msg, void *private)
75 DEBUG(2, ("Kerberos: %s\n", msg));
79 handle recv events on a smb_krb5 socket
81 static void smb_krb5_socket_recv(struct smb_krb5_socket *smb_krb5)
83 TALLOC_CTX *tmp_ctx = talloc_new(smb_krb5);
87 smb_krb5->status = socket_pending(smb_krb5->sock, &dsize);
88 if (!NT_STATUS_IS_OK(smb_krb5->status)) {
93 blob = data_blob_talloc(tmp_ctx, NULL, dsize);
94 if (blob.data == NULL && dsize != 0) {
95 smb_krb5->status = NT_STATUS_NO_MEMORY;
100 smb_krb5->status = socket_recv(smb_krb5->sock, blob.data, blob.length, &nread);
101 if (!NT_STATUS_IS_OK(smb_krb5->status)) {
102 talloc_free(tmp_ctx);
108 smb_krb5->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
109 talloc_free(tmp_ctx);
113 DEBUG(2,("Received smb_krb5 packet of length %d\n",
116 talloc_steal(smb_krb5, blob.data);
117 smb_krb5->reply = blob;
118 talloc_free(tmp_ctx);
121 static NTSTATUS smb_krb5_full_packet(void *private, DATA_BLOB data)
123 struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
124 talloc_steal(smb_krb5, data.data);
125 smb_krb5->reply = data;
126 smb_krb5->reply.length -= 4;
127 smb_krb5->reply.data += 4;
132 handle request timeouts
134 static void smb_krb5_request_timeout(struct event_context *event_ctx,
135 struct timed_event *te, struct timeval t,
138 struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
139 DEBUG(5,("Timed out smb_krb5 packet\n"));
140 smb_krb5->status = NT_STATUS_IO_TIMEOUT;
143 static void smb_krb5_error_handler(void *private, NTSTATUS status)
145 struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
146 smb_krb5->status = status;
150 handle send events on a smb_krb5 socket
152 static void smb_krb5_socket_send(struct smb_krb5_socket *smb_krb5)
158 len = smb_krb5->request.length;
159 status = socket_send(smb_krb5->sock, &smb_krb5->request, &len);
161 if (!NT_STATUS_IS_OK(status)) return;
163 EVENT_FD_READABLE(smb_krb5->fde);
165 EVENT_FD_NOT_WRITEABLE(smb_krb5->fde);
171 handle fd events on a smb_krb5_socket
173 static void smb_krb5_socket_handler(struct event_context *ev, struct fd_event *fde,
174 uint16_t flags, void *private)
176 struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
177 switch (smb_krb5->hi->proto) {
178 case KRB5_KRBHST_UDP:
179 if (flags & EVENT_FD_READ) {
180 smb_krb5_socket_recv(smb_krb5);
183 if (flags & EVENT_FD_WRITE) {
184 smb_krb5_socket_send(smb_krb5);
189 case KRB5_KRBHST_TCP:
190 if (flags & EVENT_FD_READ) {
191 packet_recv(smb_krb5->packet);
194 if (flags & EVENT_FD_WRITE) {
195 packet_queue_run(smb_krb5->packet);
200 case KRB5_KRBHST_HTTP:
207 krb5_error_code smb_krb5_send_and_recv_func(krb5_context context,
209 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 event_context *ev = talloc_get_type(data, struct event_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 if (lp_parm_bool(NULL, "krb5", "udp", true)) {
254 status = socket_create(name, SOCKET_TYPE_DGRAM, &smb_krb5->sock, 0);
257 case KRB5_KRBHST_TCP:
258 if (lp_parm_bool(NULL, "krb5", "tcp", true)) {
259 status = socket_create(name, SOCKET_TYPE_STREAM, &smb_krb5->sock, 0);
262 case KRB5_KRBHST_HTTP:
263 talloc_free(smb_krb5);
266 if (!NT_STATUS_IS_OK(status)) {
267 talloc_free(smb_krb5);
271 talloc_steal(smb_krb5, smb_krb5->sock);
273 remote_addr = socket_address_from_sockaddr(smb_krb5, a->ai_addr, a->ai_addrlen);
275 talloc_free(smb_krb5);
279 status = socket_connect_ev(smb_krb5->sock, NULL, remote_addr, 0, ev);
280 if (!NT_STATUS_IS_OK(status)) {
281 talloc_free(smb_krb5);
284 talloc_free(remote_addr);
286 /* Setup the FDE, start listening for read events
287 * from the start (otherwise we may miss a socket
288 * drop) and mark as AUTOCLOSE along with the fde */
290 /* Ths is equivilant to EVENT_FD_READABLE(smb_krb5->fde) */
291 smb_krb5->fde = event_add_fd(ev, smb_krb5->sock,
292 socket_get_fd(smb_krb5->sock),
293 EVENT_FD_READ|EVENT_FD_AUTOCLOSE,
294 smb_krb5_socket_handler, smb_krb5);
295 /* its now the job of the event layer to close the socket */
296 socket_set_flags(smb_krb5->sock, SOCKET_FLAG_NOCLOSE);
298 event_add_timed(ev, smb_krb5,
299 timeval_current_ofs(context->kdc_timeout, 0),
300 smb_krb5_request_timeout, smb_krb5);
303 smb_krb5->status = NT_STATUS_OK;
304 smb_krb5->reply = data_blob(NULL, 0);
307 case KRB5_KRBHST_UDP:
308 EVENT_FD_WRITEABLE(smb_krb5->fde);
309 smb_krb5->request = send_blob;
311 case KRB5_KRBHST_TCP:
313 smb_krb5->packet = packet_init(smb_krb5);
314 if (smb_krb5->packet == NULL) {
315 talloc_free(smb_krb5);
318 packet_set_private(smb_krb5->packet, smb_krb5);
319 packet_set_socket(smb_krb5->packet, smb_krb5->sock);
320 packet_set_callback(smb_krb5->packet, smb_krb5_full_packet);
321 packet_set_full_request(smb_krb5->packet, packet_full_request_u32);
322 packet_set_error_handler(smb_krb5->packet, smb_krb5_error_handler);
323 packet_set_event_context(smb_krb5->packet, ev);
324 packet_set_fde(smb_krb5->packet, smb_krb5->fde);
326 smb_krb5->request = data_blob_talloc(smb_krb5, NULL, send_blob.length + 4);
327 RSIVAL(smb_krb5->request.data, 0, send_blob.length);
328 memcpy(smb_krb5->request.data+4, send_blob.data, send_blob.length);
329 packet_send(smb_krb5->packet, smb_krb5->request);
331 case KRB5_KRBHST_HTTP:
332 talloc_free(smb_krb5);
335 while ((NT_STATUS_IS_OK(smb_krb5->status)) && !smb_krb5->reply.length) {
336 if (event_loop_once(ev) != 0) {
337 talloc_free(smb_krb5);
341 if (NT_STATUS_EQUAL(smb_krb5->status, NT_STATUS_IO_TIMEOUT)) {
342 talloc_free(smb_krb5);
346 if (!NT_STATUS_IS_OK(smb_krb5->status)) {
347 DEBUG(2,("Error reading smb_krb5 reply packet: %s\n", nt_errstr(smb_krb5->status)));
348 talloc_free(smb_krb5);
352 ret = krb5_data_copy(recv_buf, smb_krb5->reply.data, smb_krb5->reply.length);
354 talloc_free(smb_krb5);
357 talloc_free(smb_krb5);
364 return KRB5_KDC_UNREACH;
367 krb5_error_code smb_krb5_init_context(void *parent_ctx,
368 struct event_context *ev,
369 struct smb_krb5_context **smb_krb5_context)
374 const char *config_file;
376 initialize_krb5_error_table();
378 tmp_ctx = talloc_new(parent_ctx);
379 *smb_krb5_context = talloc(tmp_ctx, struct smb_krb5_context);
381 if (!*smb_krb5_context || !tmp_ctx) {
382 talloc_free(tmp_ctx);
386 ret = krb5_init_context(&(*smb_krb5_context)->krb5_context);
388 DEBUG(1,("krb5_init_context failed (%s)\n",
389 error_message(ret)));
390 talloc_free(tmp_ctx);
394 talloc_set_destructor(*smb_krb5_context, smb_krb5_context_destroy_1);
396 config_file = config_path(tmp_ctx, "krb5.conf");
398 talloc_free(tmp_ctx);
402 /* Use our local krb5.conf file by default */
403 ret = krb5_prepend_config_files_default(config_file, &config_files);
405 DEBUG(1,("krb5_prepend_config_files_default failed (%s)\n",
406 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
407 talloc_free(tmp_ctx);
411 ret = krb5_set_config_files((*smb_krb5_context)->krb5_context,
413 krb5_free_config_files(config_files);
415 DEBUG(1,("krb5_set_config_files failed (%s)\n",
416 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
417 talloc_free(tmp_ctx);
421 if (lp_realm() && *lp_realm()) {
422 char *upper_realm = strupper_talloc(tmp_ctx, lp_realm());
424 DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm()));
425 talloc_free(tmp_ctx);
428 ret = krb5_set_default_realm((*smb_krb5_context)->krb5_context, upper_realm);
430 DEBUG(1,("krb5_set_default_realm failed (%s)\n",
431 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
432 talloc_free(tmp_ctx);
437 /* TODO: Should we have a different name here? */
438 ret = krb5_initlog((*smb_krb5_context)->krb5_context, "Samba", &(*smb_krb5_context)->logf);
441 DEBUG(1,("krb5_initlog failed (%s)\n",
442 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
443 talloc_free(tmp_ctx);
447 talloc_set_destructor(*smb_krb5_context, smb_krb5_context_destroy_2);
449 ret = krb5_addlog_func((*smb_krb5_context)->krb5_context, (*smb_krb5_context)->logf, 0 /* min */, -1 /* max */,
450 smb_krb5_debug_wrapper, smb_krb5_debug_close, NULL);
452 DEBUG(1,("krb5_addlog_func failed (%s)\n",
453 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
454 talloc_free(tmp_ctx);
457 krb5_set_warn_dest((*smb_krb5_context)->krb5_context, (*smb_krb5_context)->logf);
459 /* Set use of our socket lib */
460 ret = krb5_set_send_to_kdc_func((*smb_krb5_context)->krb5_context,
461 smb_krb5_send_and_recv_func,
464 DEBUG(1,("krb5_set_send_recv_func failed (%s)\n",
465 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
466 talloc_free(tmp_ctx);
470 talloc_steal(parent_ctx, *smb_krb5_context);
471 talloc_free(tmp_ctx);
473 /* Set options in kerberos */
475 krb5_set_dns_canonicalize_hostname((*smb_krb5_context)->krb5_context,
476 lp_parm_bool(NULL, "krb5", "set_dns_canonicalize", false));