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 2 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, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include "system/kerberos.h"
26 #include "auth/kerberos/kerberos.h"
27 #include "lib/socket/socket.h"
28 #include "lib/events/events.h"
30 #include "heimdal_build/roken.h" /* needed on AIX for 'struct addrinfo' */
33 context structure for operations on cldap packets
35 struct smb_krb5_socket {
36 struct socket_context *sock;
43 DATA_BLOB request, reply, partial;
50 static int smb_krb5_context_destroy_1(void *ptr)
52 struct smb_krb5_context *ctx = ptr;
53 krb5_free_context(ctx->krb5_context);
57 static int smb_krb5_context_destroy_2(void *ptr)
59 struct smb_krb5_context *ctx = ptr;
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(ptr);
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(3, ("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 switch (smb_krb5->hi->proto) {
89 smb_krb5->status = socket_pending(smb_krb5->sock, &dsize);
90 if (!NT_STATUS_IS_OK(smb_krb5->status)) {
95 blob = data_blob_talloc(tmp_ctx, NULL, dsize);
96 if (blob.data == NULL && dsize != 0) {
97 smb_krb5->status = NT_STATUS_NO_MEMORY;
102 smb_krb5->status = socket_recv(smb_krb5->sock, blob.data, blob.length, &nread, 0);
103 if (!NT_STATUS_IS_OK(smb_krb5->status)) {
104 talloc_free(tmp_ctx);
110 smb_krb5->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
111 talloc_free(tmp_ctx);
115 DEBUG(2,("Received smb_krb5 packet of length %d\n",
118 talloc_steal(smb_krb5, blob.data);
119 smb_krb5->reply = blob;
120 talloc_free(tmp_ctx);
122 case KRB5_KRBHST_TCP:
123 if (smb_krb5->partial.length == 0) {
124 smb_krb5->partial = data_blob_talloc(smb_krb5, NULL, 4);
125 if (!smb_krb5->partial.data) {
126 smb_krb5->status = NT_STATUS_NO_MEMORY;
130 smb_krb5->partial_read = 0;
133 /* read in the packet length */
134 if (smb_krb5->partial_read < 4) {
135 uint32_t packet_length;
137 smb_krb5->status = socket_recv(smb_krb5->sock,
138 smb_krb5->partial.data + smb_krb5->partial_read,
139 4 - smb_krb5->partial_read,
141 /* todo: this should be converted to the packet_*() routines */
142 if (!NT_STATUS_IS_OK(smb_krb5->status)) {
146 smb_krb5->partial_read += nread;
147 if (smb_krb5->partial_read != 4) {
151 packet_length = RIVAL(smb_krb5->partial.data, 0);
153 smb_krb5->partial.data = talloc_realloc(smb_krb5, smb_krb5->partial.data,
154 uint8_t, packet_length + 4);
155 if (!smb_krb5->partial.data) {
156 smb_krb5->status = NT_STATUS_NO_MEMORY;
160 smb_krb5->partial.length = packet_length + 4;
163 /* read in the body */
164 smb_krb5->status = socket_recv(smb_krb5->sock,
165 smb_krb5->partial.data + smb_krb5->partial_read,
166 smb_krb5->partial.length - smb_krb5->partial_read,
168 if (!NT_STATUS_IS_OK(smb_krb5->status)) return;
170 smb_krb5->partial_read += nread;
172 if (smb_krb5->partial_read != smb_krb5->partial.length) return;
174 smb_krb5->reply = data_blob_talloc(smb_krb5, smb_krb5->partial.data + 4, smb_krb5->partial.length - 4);
176 case KRB5_KRBHST_HTTP:
182 handle request timeouts
184 static void smb_krb5_request_timeout(struct event_context *event_ctx,
185 struct timed_event *te, struct timeval t,
188 struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
189 DEBUG(5,("Timed out smb_krb5 packet\n"));
190 smb_krb5->timeout = True;
194 handle send events on a smb_krb5 socket
196 static void smb_krb5_socket_send(struct smb_krb5_socket *smb_krb5)
202 len = smb_krb5->request.length;
203 status = socket_send(smb_krb5->sock, &smb_krb5->request, &len, 0);
205 if (!NT_STATUS_IS_OK(status)) return;
207 EVENT_FD_READABLE(smb_krb5->fde);
209 EVENT_FD_NOT_WRITEABLE(smb_krb5->fde);
215 handle fd events on a smb_krb5_socket
217 static void smb_krb5_socket_handler(struct event_context *ev, struct fd_event *fde,
218 uint16_t flags, void *private)
220 struct smb_krb5_socket *smb_krb5 = talloc_get_type(private, struct smb_krb5_socket);
221 if (flags & EVENT_FD_WRITE) {
222 smb_krb5_socket_send(smb_krb5);
224 if (flags & EVENT_FD_READ) {
225 smb_krb5_socket_recv(smb_krb5);
230 static krb5_error_code smb_krb5_send_and_recv_func(krb5_context context,
232 krb5_krbhst_info *hi,
233 const krb5_data *send_buf,
238 struct socket_address *remote_addr;
240 struct addrinfo *ai, *a;
241 struct smb_krb5_socket *smb_krb5;
243 struct event_context *ev = talloc_get_type(data, struct event_context);
245 DATA_BLOB send_blob = data_blob_const(send_buf->data, send_buf->length);
247 ret = krb5_krbhst_get_addrinfo(context, hi, &ai);
252 for (a = ai; a; a = ai->ai_next) {
253 smb_krb5 = talloc(NULL, struct smb_krb5_socket);
259 switch (a->ai_family) {
267 talloc_free(smb_krb5);
271 status = NT_STATUS_INVALID_PARAMETER;
273 case KRB5_KRBHST_UDP:
274 if (lp_parm_bool(-1, "krb5", "udp", True)) {
275 status = socket_create(name, SOCKET_TYPE_DGRAM, &smb_krb5->sock, 0);
278 case KRB5_KRBHST_TCP:
279 if (lp_parm_bool(-1, "krb5", "tcp", True)) {
280 status = socket_create(name, SOCKET_TYPE_STREAM, &smb_krb5->sock, 0);
283 case KRB5_KRBHST_HTTP:
284 talloc_free(smb_krb5);
287 if (!NT_STATUS_IS_OK(status)) {
288 talloc_free(smb_krb5);
292 talloc_steal(smb_krb5, smb_krb5->sock);
294 remote_addr = socket_address_from_sockaddr(smb_krb5, a->ai_addr, a->ai_addrlen);
296 talloc_free(smb_krb5);
300 status = socket_connect_ev(smb_krb5->sock, NULL, remote_addr, 0, ev);
301 if (!NT_STATUS_IS_OK(status)) {
302 talloc_free(smb_krb5);
305 talloc_free(remote_addr);
307 smb_krb5->fde = event_add_fd(ev, smb_krb5,
308 socket_get_fd(smb_krb5->sock), 0,
309 smb_krb5_socket_handler, smb_krb5);
311 event_add_timed(ev, smb_krb5,
312 timeval_current_ofs(context->kdc_timeout, 0),
313 smb_krb5_request_timeout, smb_krb5);
315 EVENT_FD_WRITEABLE(smb_krb5->fde);
318 case KRB5_KRBHST_UDP:
319 smb_krb5->request = send_blob;
321 case KRB5_KRBHST_TCP:
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);
326 case KRB5_KRBHST_HTTP:
327 talloc_free(smb_krb5);
330 smb_krb5->timeout = False;
331 smb_krb5->status = NT_STATUS_OK;
332 smb_krb5->reply = data_blob(NULL, 0);
333 smb_krb5->partial = data_blob(NULL, 0);
335 while (!smb_krb5->timeout && (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_IS_OK(smb_krb5->status)) {
342 DEBUG(2,("Error reading smb_krb5 reply packet: %s\n", nt_errstr(smb_krb5->status)));
343 talloc_free(smb_krb5);
347 if (smb_krb5->timeout) {
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 /* NO internal data, so nothing to free */
368 static void smb_krb5_send_and_recv_close_func(krb5_context context, void *data)
374 krb5_error_code smb_krb5_init_context(void *parent_ctx,
375 struct smb_krb5_context **smb_krb5_context)
379 struct event_context *ev;
381 initialize_krb5_error_table();
383 tmp_ctx = talloc_new(parent_ctx);
384 *smb_krb5_context = talloc(tmp_ctx, struct smb_krb5_context);
386 if (!*smb_krb5_context || !tmp_ctx) {
387 talloc_free(*smb_krb5_context);
388 talloc_free(tmp_ctx);
392 ret = krb5_init_context(&(*smb_krb5_context)->krb5_context);
394 DEBUG(1,("krb5_init_context failed (%s)\n",
395 error_message(ret)));
399 talloc_set_destructor(*smb_krb5_context, smb_krb5_context_destroy_1);
401 if (lp_realm() && *lp_realm()) {
402 char *upper_realm = strupper_talloc(tmp_ctx, lp_realm());
404 DEBUG(1,("gensec_krb5_start: could not uppercase realm: %s\n", lp_realm()));
405 talloc_free(tmp_ctx);
408 ret = krb5_set_default_realm((*smb_krb5_context)->krb5_context, upper_realm);
410 DEBUG(1,("krb5_set_default_realm failed (%s)\n",
411 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
412 talloc_free(tmp_ctx);
417 /* TODO: Should we have a different name here? */
418 ret = krb5_initlog((*smb_krb5_context)->krb5_context, "Samba", &(*smb_krb5_context)->logf);
421 DEBUG(1,("krb5_initlog failed (%s)\n",
422 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
423 talloc_free(tmp_ctx);
427 talloc_set_destructor(*smb_krb5_context, smb_krb5_context_destroy_2);
429 ret = krb5_addlog_func((*smb_krb5_context)->krb5_context, (*smb_krb5_context)->logf, 0 /* min */, -1 /* max */,
430 smb_krb5_debug_wrapper, smb_krb5_debug_close, NULL);
432 DEBUG(1,("krb5_addlog_func failed (%s)\n",
433 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
434 talloc_free(tmp_ctx);
437 krb5_set_warn_dest((*smb_krb5_context)->krb5_context, (*smb_krb5_context)->logf);
439 ev = event_context_find(*smb_krb5_context);
440 /* Set use of our socket lib */
441 ret = krb5_set_send_recv_func((*smb_krb5_context)->krb5_context,
442 smb_krb5_send_and_recv_func,
443 smb_krb5_send_and_recv_close_func, ev);
445 DEBUG(1,("krb5_set_send_recv_func failed (%s)\n",
446 smb_get_krb5_error_message((*smb_krb5_context)->krb5_context, ret, tmp_ctx)));
447 talloc_free(tmp_ctx);
451 (*smb_krb5_context)->krb5_context->mem_ctx = *smb_krb5_context;
453 talloc_steal(parent_ctx, *smb_krb5_context);
454 talloc_free(tmp_ctx);
456 /* Set options in kerberos */
458 (*smb_krb5_context)->krb5_context->fdns = FALSE;
463 void smb_krb5_free_context(struct smb_krb5_context *smb_krb5_context)
465 talloc_free(smb_krb5_context);