2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2008
7 Copyright (C) Andrew Tridgell 2005
8 Copyright (C) Stefan Metzmacher 2005
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "smbd/process_model.h"
26 #include "lib/tsocket/tsocket.h"
27 #include "libcli/util/tstream.h"
28 #include "lib/messaging/irpc.h"
29 #include "librpc/gen_ndr/ndr_irpc.h"
30 #include "librpc/gen_ndr/ndr_krb5pac.h"
31 #include "lib/stream/packet.h"
32 #include "lib/socket/netif.h"
33 #include "param/param.h"
34 #include "kdc/kdc-glue.h"
35 #include "dsdb/samdb/samdb.h"
36 #include "auth/session.h"
38 NTSTATUS server_service_kdc_init(void);
40 extern struct krb5plugin_windc_ftable windc_plugin_table;
41 extern struct hdb_method hdb_samba4;
43 static NTSTATUS kdc_proxy_unavailable_error(struct kdc_server *kdc,
48 krb5_data k5_error_blob;
50 kret = krb5_mk_error(kdc->smb_krb5_context->krb5_context,
51 KRB5KDC_ERR_SVC_UNAVAILABLE, NULL, NULL,
52 NULL, NULL, NULL, NULL, &k5_error_blob);
54 DEBUG(2,(__location__ ": Unable to form krb5 error reply\n"));
55 return NT_STATUS_INTERNAL_ERROR;
58 *out = data_blob_talloc(mem_ctx, k5_error_blob.data, k5_error_blob.length);
59 krb5_data_free(&k5_error_blob);
61 return NT_STATUS_NO_MEMORY;
67 typedef enum kdc_process_ret (*kdc_process_fn_t)(struct kdc_server *kdc,
71 struct tsocket_address *peer_addr,
72 struct tsocket_address *my_addr,
75 /* hold information about one kdc socket */
77 struct kdc_server *kdc;
78 struct tsocket_address *local_address;
79 kdc_process_fn_t process;
83 struct kdc_tcp_connection *kdc_conn;
87 struct iovec out_iov[2];
91 state of an open tcp connection
93 struct kdc_tcp_connection {
94 /* stream connection we belong to */
95 struct stream_connection *conn;
97 /* the kdc_server the connection belongs to */
98 struct kdc_socket *kdc_socket;
100 struct tstream_context *tstream;
102 struct tevent_queue *send_queue;
106 static void kdc_tcp_terminate_connection(struct kdc_tcp_connection *kdcconn, const char *reason)
108 stream_terminate_connection(kdcconn->conn, reason);
111 static void kdc_tcp_recv(struct stream_connection *conn, uint16_t flags)
113 struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private_data,
114 struct kdc_tcp_connection);
115 /* this should never be triggered! */
116 kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_recv: called");
119 static void kdc_tcp_send(struct stream_connection *conn, uint16_t flags)
121 struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private_data,
122 struct kdc_tcp_connection);
123 /* this should never be triggered! */
124 kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_send: called");
128 Wrapper for krb5_kdc_process_krb5_request, converting to/from Samba
132 static enum kdc_process_ret kdc_process(struct kdc_server *kdc,
136 struct tsocket_address *peer_addr,
137 struct tsocket_address *my_addr,
142 struct sockaddr_storage ss;
144 krb5_data_zero(&k5_reply);
146 krb5_kdc_update_time(NULL);
148 ret = tsocket_address_bsd_sockaddr(peer_addr, (struct sockaddr *) &ss,
149 sizeof(struct sockaddr_storage));
151 return KDC_PROCESS_FAILED;
153 pa = tsocket_address_string(peer_addr, mem_ctx);
155 return KDC_PROCESS_FAILED;
158 DEBUG(10,("Received KDC packet of length %lu from %s\n",
159 (long)input->length - 4, pa));
161 ret = krb5_kdc_process_krb5_request(kdc->smb_krb5_context->krb5_context,
163 input->data, input->length,
166 (struct sockaddr *) &ss,
169 *reply = data_blob(NULL, 0);
170 return KDC_PROCESS_FAILED;
173 if (ret == HDB_ERR_NOT_FOUND_HERE) {
174 *reply = data_blob(NULL, 0);
175 return KDC_PROCESS_PROXY;
178 if (k5_reply.length) {
179 *reply = data_blob_talloc(mem_ctx, k5_reply.data, k5_reply.length);
180 krb5_data_free(&k5_reply);
182 *reply = data_blob(NULL, 0);
184 return KDC_PROCESS_OK;
187 static void kdc_tcp_call_proxy_done(struct tevent_req *subreq);
188 static void kdc_tcp_call_writev_done(struct tevent_req *subreq);
190 static void kdc_tcp_call_loop(struct tevent_req *subreq)
192 struct kdc_tcp_connection *kdc_conn = tevent_req_callback_data(subreq,
193 struct kdc_tcp_connection);
194 struct kdc_tcp_call *call;
196 enum kdc_process_ret ret;
198 call = talloc(kdc_conn, struct kdc_tcp_call);
200 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
201 "no memory for kdc_tcp_call");
204 call->kdc_conn = kdc_conn;
206 status = tstream_read_pdu_blob_recv(subreq,
210 if (!NT_STATUS_IS_OK(status)) {
213 reason = talloc_asprintf(call, "kdc_tcp_call_loop: "
214 "tstream_read_pdu_blob_recv() - %s",
217 reason = nt_errstr(status);
220 kdc_tcp_terminate_connection(kdc_conn, reason);
224 DEBUG(10,("Received krb5 TCP packet of length %lu from %s\n",
225 (long) call->in.length,
226 tsocket_address_string(kdc_conn->conn->remote_address, call)));
228 /* skip length header */
230 call->in.length -= 4;
233 ret = kdc_conn->kdc_socket->process(kdc_conn->kdc_socket->kdc,
237 kdc_conn->conn->remote_address,
238 kdc_conn->conn->local_address,
240 if (ret == KDC_PROCESS_FAILED) {
241 kdc_tcp_terminate_connection(kdc_conn,
242 "kdc_tcp_call_loop: process function failed");
246 if (ret == KDC_PROCESS_PROXY) {
249 if (!kdc_conn->kdc_socket->kdc->am_rodc) {
250 kdc_tcp_terminate_connection(kdc_conn,
251 "kdc_tcp_call_loop: proxying requested when not RODC");
254 port = tsocket_address_inet_port(kdc_conn->conn->local_address);
256 subreq = kdc_tcp_proxy_send(call,
257 kdc_conn->conn->event.ctx,
258 kdc_conn->kdc_socket->kdc,
261 if (subreq == NULL) {
262 kdc_tcp_terminate_connection(kdc_conn,
263 "kdc_tcp_call_loop: kdc_tcp_proxy_send failed");
266 tevent_req_set_callback(subreq, kdc_tcp_call_proxy_done, call);
270 /* First add the length of the out buffer */
271 RSIVAL(call->out_hdr, 0, call->out.length);
272 call->out_iov[0].iov_base = (char *) call->out_hdr;
273 call->out_iov[0].iov_len = 4;
275 call->out_iov[1].iov_base = (char *) call->out.data;
276 call->out_iov[1].iov_len = call->out.length;
278 subreq = tstream_writev_queue_send(call,
279 kdc_conn->conn->event.ctx,
281 kdc_conn->send_queue,
283 if (subreq == NULL) {
284 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
285 "no memory for tstream_writev_queue_send");
288 tevent_req_set_callback(subreq, kdc_tcp_call_writev_done, call);
291 * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
292 * packet_full_request_u32 provides the pdu length then.
294 subreq = tstream_read_pdu_blob_send(kdc_conn,
295 kdc_conn->conn->event.ctx,
297 4, /* initial_read_size */
298 packet_full_request_u32,
300 if (subreq == NULL) {
301 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
302 "no memory for tstream_read_pdu_blob_send");
305 tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
308 static void kdc_tcp_call_proxy_done(struct tevent_req *subreq)
310 struct kdc_tcp_call *call = tevent_req_callback_data(subreq,
311 struct kdc_tcp_call);
312 struct kdc_tcp_connection *kdc_conn = call->kdc_conn;
315 status = kdc_tcp_proxy_recv(subreq, call, &call->out);
317 if (!NT_STATUS_IS_OK(status)) {
318 /* generate an error packet */
319 status = kdc_proxy_unavailable_error(kdc_conn->kdc_socket->kdc,
323 if (!NT_STATUS_IS_OK(status)) {
326 reason = talloc_asprintf(call, "kdc_tcp_call_proxy_done: "
327 "kdc_proxy_unavailable_error - %s",
330 reason = "kdc_tcp_call_proxy_done: kdc_proxy_unavailable_error() failed";
333 kdc_tcp_terminate_connection(call->kdc_conn, reason);
337 /* First add the length of the out buffer */
338 RSIVAL(call->out_hdr, 0, call->out.length);
339 call->out_iov[0].iov_base = (char *) call->out_hdr;
340 call->out_iov[0].iov_len = 4;
342 call->out_iov[1].iov_base = (char *) call->out.data;
343 call->out_iov[1].iov_len = call->out.length;
345 subreq = tstream_writev_queue_send(call,
346 kdc_conn->conn->event.ctx,
348 kdc_conn->send_queue,
350 if (subreq == NULL) {
351 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
352 "no memory for tstream_writev_queue_send");
355 tevent_req_set_callback(subreq, kdc_tcp_call_writev_done, call);
358 * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
359 * packet_full_request_u32 provides the pdu length then.
361 subreq = tstream_read_pdu_blob_send(kdc_conn,
362 kdc_conn->conn->event.ctx,
364 4, /* initial_read_size */
365 packet_full_request_u32,
367 if (subreq == NULL) {
368 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
369 "no memory for tstream_read_pdu_blob_send");
372 tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
375 static void kdc_tcp_call_writev_done(struct tevent_req *subreq)
377 struct kdc_tcp_call *call = tevent_req_callback_data(subreq,
378 struct kdc_tcp_call);
382 rc = tstream_writev_queue_recv(subreq, &sys_errno);
387 reason = talloc_asprintf(call, "kdc_tcp_call_writev_done: "
388 "tstream_writev_queue_recv() - %d:%s",
389 sys_errno, strerror(sys_errno));
391 reason = "kdc_tcp_call_writev_done: tstream_writev_queue_recv() failed";
394 kdc_tcp_terminate_connection(call->kdc_conn, reason);
398 /* We don't care about errors */
404 called when we get a new connection
406 static void kdc_tcp_accept(struct stream_connection *conn)
408 struct kdc_socket *kdc_socket;
409 struct kdc_tcp_connection *kdc_conn;
410 struct tevent_req *subreq;
413 kdc_conn = talloc_zero(conn, struct kdc_tcp_connection);
414 if (kdc_conn == NULL) {
415 stream_terminate_connection(conn,
416 "kdc_tcp_accept: out of memory");
420 kdc_conn->send_queue = tevent_queue_create(conn, "kdc_tcp_accept");
421 if (kdc_conn->send_queue == NULL) {
422 stream_terminate_connection(conn,
423 "kdc_tcp_accept: out of memory");
427 kdc_socket = talloc_get_type(conn->private_data, struct kdc_socket);
429 TALLOC_FREE(conn->event.fde);
431 rc = tstream_bsd_existing_socket(kdc_conn,
432 socket_get_fd(conn->socket),
435 stream_terminate_connection(conn,
436 "kdc_tcp_accept: out of memory");
440 kdc_conn->conn = conn;
441 kdc_conn->kdc_socket = kdc_socket;
442 conn->private_data = kdc_conn;
445 * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
446 * packet_full_request_u32 provides the pdu length then.
448 subreq = tstream_read_pdu_blob_send(kdc_conn,
449 kdc_conn->conn->event.ctx,
451 4, /* initial_read_size */
452 packet_full_request_u32,
454 if (subreq == NULL) {
455 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_accept: "
456 "no memory for tstream_read_pdu_blob_send");
459 tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
462 static const struct stream_server_ops kdc_tcp_stream_ops = {
464 .accept_connection = kdc_tcp_accept,
465 .recv_handler = kdc_tcp_recv,
466 .send_handler = kdc_tcp_send
469 /* hold information about one kdc/kpasswd udp socket */
470 struct kdc_udp_socket {
471 struct kdc_socket *kdc_socket;
472 struct tdgram_context *dgram;
473 struct tevent_queue *send_queue;
476 struct kdc_udp_call {
477 struct kdc_udp_socket *sock;
478 struct tsocket_address *src;
483 static void kdc_udp_call_proxy_done(struct tevent_req *subreq);
484 static void kdc_udp_call_sendto_done(struct tevent_req *subreq);
486 static void kdc_udp_call_loop(struct tevent_req *subreq)
488 struct kdc_udp_socket *sock = tevent_req_callback_data(subreq,
489 struct kdc_udp_socket);
490 struct kdc_udp_call *call;
494 enum kdc_process_ret ret;
496 call = talloc(sock, struct kdc_udp_call);
503 len = tdgram_recvfrom_recv(subreq, &sys_errno,
504 call, &buf, &call->src);
512 call->in.length = len;
514 DEBUG(10,("Received krb5 UDP packet of length %lu from %s\n",
515 (long)call->in.length,
516 tsocket_address_string(call->src, call)));
519 ret = sock->kdc_socket->process(sock->kdc_socket->kdc,
524 sock->kdc_socket->local_address,
526 if (ret == KDC_PROCESS_FAILED) {
531 if (ret == KDC_PROCESS_PROXY) {
534 if (!sock->kdc_socket->kdc->am_rodc) {
535 DEBUG(0,("kdc_udp_call_loop: proxying requested when not RODC"));
540 port = tsocket_address_inet_port(sock->kdc_socket->local_address);
542 subreq = kdc_udp_proxy_send(call,
543 sock->kdc_socket->kdc->task->event_ctx,
544 sock->kdc_socket->kdc,
547 if (subreq == NULL) {
551 tevent_req_set_callback(subreq, kdc_udp_call_proxy_done, call);
555 subreq = tdgram_sendto_queue_send(call,
556 sock->kdc_socket->kdc->task->event_ctx,
562 if (subreq == NULL) {
566 tevent_req_set_callback(subreq, kdc_udp_call_sendto_done, call);
569 subreq = tdgram_recvfrom_send(sock,
570 sock->kdc_socket->kdc->task->event_ctx,
572 if (subreq == NULL) {
573 task_server_terminate(sock->kdc_socket->kdc->task,
574 "no memory for tdgram_recvfrom_send",
578 tevent_req_set_callback(subreq, kdc_udp_call_loop, sock);
581 static void kdc_udp_call_proxy_done(struct tevent_req *subreq)
583 struct kdc_udp_call *call =
584 tevent_req_callback_data(subreq,
585 struct kdc_udp_call);
588 status = kdc_udp_proxy_recv(subreq, call, &call->out);
590 if (!NT_STATUS_IS_OK(status)) {
591 /* generate an error packet */
592 status = kdc_proxy_unavailable_error(call->sock->kdc_socket->kdc,
596 if (!NT_STATUS_IS_OK(status)) {
601 subreq = tdgram_sendto_queue_send(call,
602 call->sock->kdc_socket->kdc->task->event_ctx,
604 call->sock->send_queue,
608 if (subreq == NULL) {
613 tevent_req_set_callback(subreq, kdc_udp_call_sendto_done, call);
616 static void kdc_udp_call_sendto_done(struct tevent_req *subreq)
618 struct kdc_udp_call *call = tevent_req_callback_data(subreq,
619 struct kdc_udp_call);
623 ret = tdgram_sendto_queue_recv(subreq, &sys_errno);
625 /* We don't care about errors */
631 start listening on the given address
633 static NTSTATUS kdc_add_socket(struct kdc_server *kdc,
634 const struct model_ops *model_ops,
638 kdc_process_fn_t process,
641 struct kdc_socket *kdc_socket;
642 struct kdc_udp_socket *kdc_udp_socket;
643 struct tevent_req *udpsubreq;
647 kdc_socket = talloc(kdc, struct kdc_socket);
648 NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
650 kdc_socket->kdc = kdc;
651 kdc_socket->process = process;
653 ret = tsocket_address_inet_from_strings(kdc_socket, "ip",
655 &kdc_socket->local_address);
657 status = map_nt_error_from_unix_common(errno);
662 status = stream_setup_socket(kdc->task,
663 kdc->task->event_ctx,
667 "ip", address, &port,
668 lpcfg_socket_options(kdc->task->lp_ctx),
670 if (!NT_STATUS_IS_OK(status)) {
671 DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
672 address, port, nt_errstr(status)));
673 talloc_free(kdc_socket);
678 kdc_udp_socket = talloc(kdc_socket, struct kdc_udp_socket);
679 NT_STATUS_HAVE_NO_MEMORY(kdc_udp_socket);
681 kdc_udp_socket->kdc_socket = kdc_socket;
683 ret = tdgram_inet_udp_socket(kdc_socket->local_address,
686 &kdc_udp_socket->dgram);
688 status = map_nt_error_from_unix_common(errno);
689 DEBUG(0,("Failed to bind to %s:%u UDP - %s\n",
690 address, port, nt_errstr(status)));
694 kdc_udp_socket->send_queue = tevent_queue_create(kdc_udp_socket,
695 "kdc_udp_send_queue");
696 NT_STATUS_HAVE_NO_MEMORY(kdc_udp_socket->send_queue);
698 udpsubreq = tdgram_recvfrom_send(kdc_udp_socket,
699 kdc->task->event_ctx,
700 kdc_udp_socket->dgram);
701 NT_STATUS_HAVE_NO_MEMORY(udpsubreq);
702 tevent_req_set_callback(udpsubreq, kdc_udp_call_loop, kdc_udp_socket);
709 setup our listening sockets on the configured network interfaces
711 static NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc, struct loadparm_context *lp_ctx,
712 struct interface *ifaces)
714 const struct model_ops *model_ops;
716 TALLOC_CTX *tmp_ctx = talloc_new(kdc);
719 uint16_t kdc_port = lpcfg_krb5_port(lp_ctx);
720 uint16_t kpasswd_port = lpcfg_kpasswd_port(lp_ctx);
721 bool done_wildcard = false;
723 /* within the kdc task we want to be a single process, so
724 ask for the single process model ops and pass these to the
725 stream_setup_socket() call. */
726 model_ops = process_model_startup("single");
728 DEBUG(0,("Can't find 'single' process model_ops\n"));
729 return NT_STATUS_INTERNAL_ERROR;
732 num_interfaces = iface_list_count(ifaces);
734 /* if we are allowing incoming packets from any address, then
735 we need to bind to the wildcard address */
736 if (!lpcfg_bind_interfaces_only(lp_ctx)) {
737 const char **wcard = iface_list_wildcard(kdc, lp_ctx);
738 NT_STATUS_HAVE_NO_MEMORY(wcard);
739 for (i=0; wcard[i]; i++) {
741 status = kdc_add_socket(kdc, model_ops,
742 "kdc", wcard[i], kdc_port,
744 NT_STATUS_NOT_OK_RETURN(status);
748 status = kdc_add_socket(kdc, model_ops,
749 "kpasswd", wcard[i], kpasswd_port,
750 kpasswdd_process, false);
751 NT_STATUS_NOT_OK_RETURN(status);
755 done_wildcard = true;
758 for (i=0; i<num_interfaces; i++) {
759 const char *address = talloc_strdup(tmp_ctx, iface_list_n_ip(ifaces, i));
762 status = kdc_add_socket(kdc, model_ops,
763 "kdc", address, kdc_port,
764 kdc_process, done_wildcard);
765 NT_STATUS_NOT_OK_RETURN(status);
769 status = kdc_add_socket(kdc, model_ops,
770 "kpasswd", address, kpasswd_port,
771 kpasswdd_process, done_wildcard);
772 NT_STATUS_NOT_OK_RETURN(status);
776 talloc_free(tmp_ctx);
782 static NTSTATUS kdc_check_generic_kerberos(struct irpc_message *msg,
783 struct kdc_check_generic_kerberos *r)
785 struct PAC_Validate pac_validate;
787 struct PAC_SIGNATURE_DATA kdc_sig;
788 struct kdc_server *kdc = talloc_get_type(msg->private_data, struct kdc_server);
789 enum ndr_err_code ndr_err;
793 krb5_principal principal;
794 krb5_keyblock keyblock;
797 /* There is no reply to this request */
798 r->out.generic_reply = data_blob(NULL, 0);
800 ndr_err = ndr_pull_struct_blob(&r->in.generic_request, msg, &pac_validate,
801 (ndr_pull_flags_fn_t)ndr_pull_PAC_Validate);
802 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
803 return NT_STATUS_INVALID_PARAMETER;
806 if (pac_validate.MessageType != 3) {
807 /* We don't implement any other message types - such as certificate validation - yet */
808 return NT_STATUS_INVALID_PARAMETER;
811 if (pac_validate.ChecksumAndSignature.length != (pac_validate.ChecksumLength + pac_validate.SignatureLength)
812 || pac_validate.ChecksumAndSignature.length < pac_validate.ChecksumLength
813 || pac_validate.ChecksumAndSignature.length < pac_validate.SignatureLength ) {
814 return NT_STATUS_INVALID_PARAMETER;
817 srv_sig = data_blob_const(pac_validate.ChecksumAndSignature.data,
818 pac_validate.ChecksumLength);
820 if (pac_validate.SignatureType == CKSUMTYPE_HMAC_MD5) {
821 etype = ETYPE_ARCFOUR_HMAC_MD5;
823 ret = krb5_cksumtype_to_enctype(kdc->smb_krb5_context->krb5_context, pac_validate.SignatureType,
826 return NT_STATUS_LOGON_FAILURE;
830 ret = krb5_make_principal(kdc->smb_krb5_context->krb5_context, &principal,
831 lpcfg_realm(kdc->task->lp_ctx),
832 "krbtgt", lpcfg_realm(kdc->task->lp_ctx),
836 return NT_STATUS_NO_MEMORY;
839 ret = kdc->config->db[0]->hdb_fetch_kvno(kdc->smb_krb5_context->krb5_context,
842 HDB_F_GET_KRBTGT | HDB_F_DECRYPT,
847 hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
848 krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
850 return NT_STATUS_LOGON_FAILURE;
853 ret = hdb_enctype2key(kdc->smb_krb5_context->krb5_context, &ent.entry, etype, &key);
856 hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
857 krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
858 return NT_STATUS_LOGON_FAILURE;
863 kdc_sig.type = pac_validate.SignatureType;
864 kdc_sig.signature = data_blob_const(&pac_validate.ChecksumAndSignature.data[pac_validate.ChecksumLength],
865 pac_validate.SignatureLength);
866 ret = check_pac_checksum(msg, srv_sig, &kdc_sig,
867 kdc->smb_krb5_context->krb5_context, &keyblock);
869 hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
870 krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
873 return NT_STATUS_LOGON_FAILURE;
883 static void kdc_task_init(struct task_server *task)
885 struct kdc_server *kdc;
888 struct interface *ifaces;
891 switch (lpcfg_server_role(task->lp_ctx)) {
892 case ROLE_STANDALONE:
893 task_server_terminate(task, "kdc: no KDC required in standalone configuration", false);
895 case ROLE_DOMAIN_MEMBER:
896 task_server_terminate(task, "kdc: no KDC required in member server configuration", false);
898 case ROLE_DOMAIN_CONTROLLER:
899 /* Yes, we want a KDC */
903 load_interface_list(task, task->lp_ctx, &ifaces);
905 if (iface_list_count(ifaces) == 0) {
906 task_server_terminate(task, "kdc: no network interfaces configured", false);
910 task_server_set_title(task, "task[kdc]");
912 kdc = talloc_zero(task, struct kdc_server);
914 task_server_terminate(task, "kdc: out of memory", true);
921 /* get a samdb connection */
922 kdc->samdb = samdb_connect(kdc, kdc->task->event_ctx, kdc->task->lp_ctx,
923 system_session(kdc->task->lp_ctx), 0);
925 DEBUG(1,("kdc_task_init: unable to connect to samdb\n"));
926 task_server_terminate(task, "kdc: krb5_init_context samdb connect failed", true);
930 ldb_ret = samdb_rodc(kdc->samdb, &kdc->am_rodc);
931 if (ldb_ret != LDB_SUCCESS) {
932 DEBUG(1, ("kdc_task_init: Cannot determine if we are an RODC: %s\n",
933 ldb_errstring(kdc->samdb)));
934 task_server_terminate(task, "kdc: krb5_init_context samdb RODC connect failed", true);
938 kdc->proxy_timeout = lpcfg_parm_int(kdc->task->lp_ctx, NULL, "kdc", "proxy timeout", 5);
940 initialize_krb5_error_table();
942 ret = smb_krb5_init_context(kdc, task->event_ctx, task->lp_ctx, &kdc->smb_krb5_context);
944 DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
945 error_message(ret)));
946 task_server_terminate(task, "kdc: krb5_init_context failed", true);
950 krb5_add_et_list(kdc->smb_krb5_context->krb5_context, initialize_hdb_error_table_r);
952 ret = krb5_kdc_get_config(kdc->smb_krb5_context->krb5_context,
955 task_server_terminate(task, "kdc: failed to get KDC configuration", true);
959 kdc->config->logf = kdc->smb_krb5_context->logf;
960 kdc->config->db = talloc(kdc, struct HDB *);
961 if (!kdc->config->db) {
962 task_server_terminate(task, "kdc: out of memory", true);
965 kdc->config->num_db = 1;
968 * TODO: find out why this is needed in order
969 * to let make test work.
971 * Without this, we are getting PAC varification
972 * failures. I guess because the PAC is not signed
973 * with a arcfour-hmac-md5 key.
975 kdc->config->as_use_strongest_session_key = true;
976 kdc->config->preauth_use_strongest_session_key = true;
977 kdc->config->tgs_use_strongest_session_key = true;
978 kdc->config->use_strongest_server_key = true;
980 /* Register hdb-samba4 hooks for use as a keytab */
982 kdc->base_ctx = talloc_zero(kdc, struct samba_kdc_base_context);
983 if (!kdc->base_ctx) {
984 task_server_terminate(task, "kdc: out of memory", true);
988 kdc->base_ctx->ev_ctx = task->event_ctx;
989 kdc->base_ctx->lp_ctx = task->lp_ctx;
991 status = hdb_samba4_create_kdc(kdc->base_ctx,
992 kdc->smb_krb5_context->krb5_context,
993 &kdc->config->db[0]);
994 if (!NT_STATUS_IS_OK(status)) {
995 task_server_terminate(task, "kdc: hdb_samba4_create_kdc (setup KDC database) failed", true);
999 ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
1000 PLUGIN_TYPE_DATA, "hdb",
1003 task_server_terminate(task, "kdc: failed to register hdb plugin", true);
1007 ret = krb5_kt_register(kdc->smb_krb5_context->krb5_context, &hdb_kt_ops);
1009 task_server_terminate(task, "kdc: failed to register keytab plugin", true);
1013 /* Register WinDC hooks */
1014 ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
1015 PLUGIN_TYPE_DATA, "windc",
1016 &windc_plugin_table);
1018 task_server_terminate(task, "kdc: failed to register windc plugin", true);
1022 ret = krb5_kdc_windc_init(kdc->smb_krb5_context->krb5_context);
1025 task_server_terminate(task, "kdc: failed to init windc plugin", true);
1029 ret = krb5_kdc_pkinit_config(kdc->smb_krb5_context->krb5_context, kdc->config);
1032 task_server_terminate(task, "kdc: failed to init kdc pkinit subsystem", true);
1036 /* start listening on the configured network interfaces */
1037 status = kdc_startup_interfaces(kdc, task->lp_ctx, ifaces);
1038 if (!NT_STATUS_IS_OK(status)) {
1039 task_server_terminate(task, "kdc failed to setup interfaces", true);
1043 status = IRPC_REGISTER(task->msg_ctx, irpc, KDC_CHECK_GENERIC_KERBEROS,
1044 kdc_check_generic_kerberos, kdc);
1045 if (!NT_STATUS_IS_OK(status)) {
1046 task_server_terminate(task, "kdc failed to setup monitoring", true);
1050 irpc_add_name(task->msg_ctx, "kdc_server");
1054 /* called at smbd startup - register ourselves as a server service */
1055 NTSTATUS server_service_kdc_init(void)
1057 return register_server_service("kdc", kdc_task_init);