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 extern struct krb5plugin_windc_ftable windc_plugin_table;
39 extern struct hdb_method hdb_samba4;
41 static NTSTATUS kdc_proxy_unavailable_error(struct kdc_server *kdc,
46 krb5_data k5_error_blob;
48 kret = krb5_mk_error(kdc->smb_krb5_context->krb5_context,
49 KRB5KDC_ERR_SVC_UNAVAILABLE, NULL, NULL,
50 NULL, NULL, NULL, NULL, &k5_error_blob);
52 DEBUG(2,(__location__ ": Unable to form krb5 error reply\n"));
53 return NT_STATUS_INTERNAL_ERROR;
56 *out = data_blob_talloc(mem_ctx, k5_error_blob.data, k5_error_blob.length);
57 krb5_data_free(&k5_error_blob);
59 return NT_STATUS_NO_MEMORY;
65 typedef enum kdc_process_ret (*kdc_process_fn_t)(struct kdc_server *kdc,
69 struct tsocket_address *peer_addr,
70 struct tsocket_address *my_addr,
73 /* hold information about one kdc socket */
75 struct kdc_server *kdc;
76 struct tsocket_address *local_address;
77 kdc_process_fn_t process;
81 struct kdc_tcp_connection *kdc_conn;
85 struct iovec out_iov[2];
89 state of an open tcp connection
91 struct kdc_tcp_connection {
92 /* stream connection we belong to */
93 struct stream_connection *conn;
95 /* the kdc_server the connection belongs to */
96 struct kdc_socket *kdc_socket;
98 struct tstream_context *tstream;
100 struct tevent_queue *send_queue;
104 static void kdc_tcp_terminate_connection(struct kdc_tcp_connection *kdcconn, const char *reason)
106 stream_terminate_connection(kdcconn->conn, reason);
109 static void kdc_tcp_recv(struct stream_connection *conn, uint16_t flags)
111 struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private_data,
112 struct kdc_tcp_connection);
113 /* this should never be triggered! */
114 kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_recv: called");
117 static void kdc_tcp_send(struct stream_connection *conn, uint16_t flags)
119 struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private_data,
120 struct kdc_tcp_connection);
121 /* this should never be triggered! */
122 kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_send: called");
126 Wrapper for krb5_kdc_process_krb5_request, converting to/from Samba
130 static enum kdc_process_ret kdc_process(struct kdc_server *kdc,
134 struct tsocket_address *peer_addr,
135 struct tsocket_address *my_addr,
140 struct sockaddr_storage ss;
142 krb5_data_zero(&k5_reply);
144 krb5_kdc_update_time(NULL);
146 ret = tsocket_address_bsd_sockaddr(peer_addr, (struct sockaddr *) &ss,
147 sizeof(struct sockaddr_storage));
149 return KDC_PROCESS_FAILED;
151 pa = tsocket_address_string(peer_addr, mem_ctx);
153 return KDC_PROCESS_FAILED;
156 DEBUG(10,("Received KDC packet of length %lu from %s\n",
157 (long)input->length - 4, pa));
159 ret = krb5_kdc_process_krb5_request(kdc->smb_krb5_context->krb5_context,
161 input->data, input->length,
164 (struct sockaddr *) &ss,
167 *reply = data_blob(NULL, 0);
168 return KDC_PROCESS_FAILED;
171 if (ret == HDB_ERR_NOT_FOUND_HERE) {
172 *reply = data_blob(NULL, 0);
173 return KDC_PROCESS_PROXY;
176 if (k5_reply.length) {
177 *reply = data_blob_talloc(mem_ctx, k5_reply.data, k5_reply.length);
178 krb5_data_free(&k5_reply);
180 *reply = data_blob(NULL, 0);
182 return KDC_PROCESS_OK;
185 static void kdc_tcp_call_proxy_done(struct tevent_req *subreq);
186 static void kdc_tcp_call_writev_done(struct tevent_req *subreq);
188 static void kdc_tcp_call_loop(struct tevent_req *subreq)
190 struct kdc_tcp_connection *kdc_conn = tevent_req_callback_data(subreq,
191 struct kdc_tcp_connection);
192 struct kdc_tcp_call *call;
194 enum kdc_process_ret ret;
196 call = talloc(kdc_conn, struct kdc_tcp_call);
198 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
199 "no memory for kdc_tcp_call");
202 call->kdc_conn = kdc_conn;
204 status = tstream_read_pdu_blob_recv(subreq,
208 if (!NT_STATUS_IS_OK(status)) {
211 reason = talloc_asprintf(call, "kdc_tcp_call_loop: "
212 "tstream_read_pdu_blob_recv() - %s",
215 reason = nt_errstr(status);
218 kdc_tcp_terminate_connection(kdc_conn, reason);
222 DEBUG(10,("Received krb5 TCP packet of length %lu from %s\n",
223 (long) call->in.length,
224 tsocket_address_string(kdc_conn->conn->remote_address, call)));
226 /* skip length header */
228 call->in.length -= 4;
231 ret = kdc_conn->kdc_socket->process(kdc_conn->kdc_socket->kdc,
235 kdc_conn->conn->remote_address,
236 kdc_conn->conn->local_address,
238 if (ret == KDC_PROCESS_FAILED) {
239 kdc_tcp_terminate_connection(kdc_conn,
240 "kdc_tcp_call_loop: process function failed");
244 if (ret == KDC_PROCESS_PROXY) {
247 if (!kdc_conn->kdc_socket->kdc->am_rodc) {
248 kdc_tcp_terminate_connection(kdc_conn,
249 "kdc_tcp_call_loop: proxying requested when not RODC");
252 port = tsocket_address_inet_port(kdc_conn->conn->local_address);
254 subreq = kdc_tcp_proxy_send(call,
255 kdc_conn->conn->event.ctx,
256 kdc_conn->kdc_socket->kdc,
259 if (subreq == NULL) {
260 kdc_tcp_terminate_connection(kdc_conn,
261 "kdc_tcp_call_loop: kdc_tcp_proxy_send failed");
264 tevent_req_set_callback(subreq, kdc_tcp_call_proxy_done, call);
268 /* First add the length of the out buffer */
269 RSIVAL(call->out_hdr, 0, call->out.length);
270 call->out_iov[0].iov_base = (char *) call->out_hdr;
271 call->out_iov[0].iov_len = 4;
273 call->out_iov[1].iov_base = (char *) call->out.data;
274 call->out_iov[1].iov_len = call->out.length;
276 subreq = tstream_writev_queue_send(call,
277 kdc_conn->conn->event.ctx,
279 kdc_conn->send_queue,
281 if (subreq == NULL) {
282 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
283 "no memory for tstream_writev_queue_send");
286 tevent_req_set_callback(subreq, kdc_tcp_call_writev_done, call);
289 * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
290 * packet_full_request_u32 provides the pdu length then.
292 subreq = tstream_read_pdu_blob_send(kdc_conn,
293 kdc_conn->conn->event.ctx,
295 4, /* initial_read_size */
296 packet_full_request_u32,
298 if (subreq == NULL) {
299 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
300 "no memory for tstream_read_pdu_blob_send");
303 tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
306 static void kdc_tcp_call_proxy_done(struct tevent_req *subreq)
308 struct kdc_tcp_call *call = tevent_req_callback_data(subreq,
309 struct kdc_tcp_call);
310 struct kdc_tcp_connection *kdc_conn = call->kdc_conn;
313 status = kdc_tcp_proxy_recv(subreq, call, &call->out);
315 if (!NT_STATUS_IS_OK(status)) {
316 /* generate an error packet */
317 status = kdc_proxy_unavailable_error(kdc_conn->kdc_socket->kdc,
321 if (!NT_STATUS_IS_OK(status)) {
324 reason = talloc_asprintf(call, "kdc_tcp_call_proxy_done: "
325 "kdc_proxy_unavailable_error - %s",
328 reason = "kdc_tcp_call_proxy_done: kdc_proxy_unavailable_error() failed";
331 kdc_tcp_terminate_connection(call->kdc_conn, reason);
335 /* First add the length of the out buffer */
336 RSIVAL(call->out_hdr, 0, call->out.length);
337 call->out_iov[0].iov_base = (char *) call->out_hdr;
338 call->out_iov[0].iov_len = 4;
340 call->out_iov[1].iov_base = (char *) call->out.data;
341 call->out_iov[1].iov_len = call->out.length;
343 subreq = tstream_writev_queue_send(call,
344 kdc_conn->conn->event.ctx,
346 kdc_conn->send_queue,
348 if (subreq == NULL) {
349 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
350 "no memory for tstream_writev_queue_send");
353 tevent_req_set_callback(subreq, kdc_tcp_call_writev_done, call);
356 * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
357 * packet_full_request_u32 provides the pdu length then.
359 subreq = tstream_read_pdu_blob_send(kdc_conn,
360 kdc_conn->conn->event.ctx,
362 4, /* initial_read_size */
363 packet_full_request_u32,
365 if (subreq == NULL) {
366 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
367 "no memory for tstream_read_pdu_blob_send");
370 tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
373 static void kdc_tcp_call_writev_done(struct tevent_req *subreq)
375 struct kdc_tcp_call *call = tevent_req_callback_data(subreq,
376 struct kdc_tcp_call);
380 rc = tstream_writev_queue_recv(subreq, &sys_errno);
385 reason = talloc_asprintf(call, "kdc_tcp_call_writev_done: "
386 "tstream_writev_queue_recv() - %d:%s",
387 sys_errno, strerror(sys_errno));
389 reason = "kdc_tcp_call_writev_done: tstream_writev_queue_recv() failed";
392 kdc_tcp_terminate_connection(call->kdc_conn, reason);
396 /* We don't care about errors */
402 called when we get a new connection
404 static void kdc_tcp_accept(struct stream_connection *conn)
406 struct kdc_socket *kdc_socket;
407 struct kdc_tcp_connection *kdc_conn;
408 struct tevent_req *subreq;
411 kdc_conn = talloc_zero(conn, struct kdc_tcp_connection);
412 if (kdc_conn == NULL) {
413 stream_terminate_connection(conn,
414 "kdc_tcp_accept: out of memory");
418 kdc_conn->send_queue = tevent_queue_create(conn, "kdc_tcp_accept");
419 if (kdc_conn->send_queue == NULL) {
420 stream_terminate_connection(conn,
421 "kdc_tcp_accept: out of memory");
425 kdc_socket = talloc_get_type(conn->private_data, struct kdc_socket);
427 TALLOC_FREE(conn->event.fde);
429 rc = tstream_bsd_existing_socket(kdc_conn,
430 socket_get_fd(conn->socket),
433 stream_terminate_connection(conn,
434 "kdc_tcp_accept: out of memory");
438 kdc_conn->conn = conn;
439 kdc_conn->kdc_socket = kdc_socket;
440 conn->private_data = kdc_conn;
443 * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
444 * packet_full_request_u32 provides the pdu length then.
446 subreq = tstream_read_pdu_blob_send(kdc_conn,
447 kdc_conn->conn->event.ctx,
449 4, /* initial_read_size */
450 packet_full_request_u32,
452 if (subreq == NULL) {
453 kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_accept: "
454 "no memory for tstream_read_pdu_blob_send");
457 tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
460 static const struct stream_server_ops kdc_tcp_stream_ops = {
462 .accept_connection = kdc_tcp_accept,
463 .recv_handler = kdc_tcp_recv,
464 .send_handler = kdc_tcp_send
467 /* hold information about one kdc/kpasswd udp socket */
468 struct kdc_udp_socket {
469 struct kdc_socket *kdc_socket;
470 struct tdgram_context *dgram;
471 struct tevent_queue *send_queue;
474 struct kdc_udp_call {
475 struct kdc_udp_socket *sock;
476 struct tsocket_address *src;
481 static void kdc_udp_call_proxy_done(struct tevent_req *subreq);
482 static void kdc_udp_call_sendto_done(struct tevent_req *subreq);
484 static void kdc_udp_call_loop(struct tevent_req *subreq)
486 struct kdc_udp_socket *sock = tevent_req_callback_data(subreq,
487 struct kdc_udp_socket);
488 struct kdc_udp_call *call;
492 enum kdc_process_ret ret;
494 call = talloc(sock, struct kdc_udp_call);
501 len = tdgram_recvfrom_recv(subreq, &sys_errno,
502 call, &buf, &call->src);
510 call->in.length = len;
512 DEBUG(10,("Received krb5 UDP packet of length %lu from %s\n",
513 (long)call->in.length,
514 tsocket_address_string(call->src, call)));
517 ret = sock->kdc_socket->process(sock->kdc_socket->kdc,
522 sock->kdc_socket->local_address,
524 if (ret == KDC_PROCESS_FAILED) {
529 if (ret == KDC_PROCESS_PROXY) {
532 if (!sock->kdc_socket->kdc->am_rodc) {
533 DEBUG(0,("kdc_udp_call_loop: proxying requested when not RODC"));
538 port = tsocket_address_inet_port(sock->kdc_socket->local_address);
540 subreq = kdc_udp_proxy_send(call,
541 sock->kdc_socket->kdc->task->event_ctx,
542 sock->kdc_socket->kdc,
545 if (subreq == NULL) {
549 tevent_req_set_callback(subreq, kdc_udp_call_proxy_done, call);
553 subreq = tdgram_sendto_queue_send(call,
554 sock->kdc_socket->kdc->task->event_ctx,
560 if (subreq == NULL) {
564 tevent_req_set_callback(subreq, kdc_udp_call_sendto_done, call);
567 subreq = tdgram_recvfrom_send(sock,
568 sock->kdc_socket->kdc->task->event_ctx,
570 if (subreq == NULL) {
571 task_server_terminate(sock->kdc_socket->kdc->task,
572 "no memory for tdgram_recvfrom_send",
576 tevent_req_set_callback(subreq, kdc_udp_call_loop, sock);
579 static void kdc_udp_call_proxy_done(struct tevent_req *subreq)
581 struct kdc_udp_call *call =
582 tevent_req_callback_data(subreq,
583 struct kdc_udp_call);
586 status = kdc_udp_proxy_recv(subreq, call, &call->out);
588 if (!NT_STATUS_IS_OK(status)) {
589 /* generate an error packet */
590 status = kdc_proxy_unavailable_error(call->sock->kdc_socket->kdc,
594 if (!NT_STATUS_IS_OK(status)) {
599 subreq = tdgram_sendto_queue_send(call,
600 call->sock->kdc_socket->kdc->task->event_ctx,
602 call->sock->send_queue,
606 if (subreq == NULL) {
611 tevent_req_set_callback(subreq, kdc_udp_call_sendto_done, call);
614 static void kdc_udp_call_sendto_done(struct tevent_req *subreq)
616 struct kdc_udp_call *call = tevent_req_callback_data(subreq,
617 struct kdc_udp_call);
621 ret = tdgram_sendto_queue_recv(subreq, &sys_errno);
623 /* We don't care about errors */
629 start listening on the given address
631 static NTSTATUS kdc_add_socket(struct kdc_server *kdc,
632 const struct model_ops *model_ops,
636 kdc_process_fn_t process,
639 struct kdc_socket *kdc_socket;
640 struct kdc_udp_socket *kdc_udp_socket;
641 struct tevent_req *udpsubreq;
645 kdc_socket = talloc(kdc, struct kdc_socket);
646 NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
648 kdc_socket->kdc = kdc;
649 kdc_socket->process = process;
651 ret = tsocket_address_inet_from_strings(kdc_socket, "ip",
653 &kdc_socket->local_address);
655 status = map_nt_error_from_unix(errno);
660 status = stream_setup_socket(kdc->task,
661 kdc->task->event_ctx,
665 "ip", address, &port,
666 lpcfg_socket_options(kdc->task->lp_ctx),
668 if (!NT_STATUS_IS_OK(status)) {
669 DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
670 address, port, nt_errstr(status)));
671 talloc_free(kdc_socket);
676 kdc_udp_socket = talloc(kdc_socket, struct kdc_udp_socket);
677 NT_STATUS_HAVE_NO_MEMORY(kdc_udp_socket);
679 kdc_udp_socket->kdc_socket = kdc_socket;
681 ret = tdgram_inet_udp_socket(kdc_socket->local_address,
684 &kdc_udp_socket->dgram);
686 status = map_nt_error_from_unix(errno);
687 DEBUG(0,("Failed to bind to %s:%u UDP - %s\n",
688 address, port, nt_errstr(status)));
692 kdc_udp_socket->send_queue = tevent_queue_create(kdc_udp_socket,
693 "kdc_udp_send_queue");
694 NT_STATUS_HAVE_NO_MEMORY(kdc_udp_socket->send_queue);
696 udpsubreq = tdgram_recvfrom_send(kdc_udp_socket,
697 kdc->task->event_ctx,
698 kdc_udp_socket->dgram);
699 NT_STATUS_HAVE_NO_MEMORY(udpsubreq);
700 tevent_req_set_callback(udpsubreq, kdc_udp_call_loop, kdc_udp_socket);
707 setup our listening sockets on the configured network interfaces
709 static NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc, struct loadparm_context *lp_ctx,
710 struct interface *ifaces)
712 const struct model_ops *model_ops;
714 TALLOC_CTX *tmp_ctx = talloc_new(kdc);
717 uint16_t kdc_port = lpcfg_krb5_port(lp_ctx);
718 uint16_t kpasswd_port = lpcfg_kpasswd_port(lp_ctx);
719 bool done_wildcard = false;
721 /* within the kdc task we want to be a single process, so
722 ask for the single process model ops and pass these to the
723 stream_setup_socket() call. */
724 model_ops = process_model_startup("single");
726 DEBUG(0,("Can't find 'single' process model_ops\n"));
727 return NT_STATUS_INTERNAL_ERROR;
730 num_interfaces = iface_count(ifaces);
732 /* if we are allowing incoming packets from any address, then
733 we need to bind to the wildcard address */
734 if (!lpcfg_bind_interfaces_only(lp_ctx)) {
736 status = kdc_add_socket(kdc, model_ops,
737 "kdc", "0.0.0.0", kdc_port,
739 NT_STATUS_NOT_OK_RETURN(status);
743 status = kdc_add_socket(kdc, model_ops,
744 "kpasswd", "0.0.0.0", kpasswd_port,
745 kpasswdd_process, false);
746 NT_STATUS_NOT_OK_RETURN(status);
748 done_wildcard = true;
751 for (i=0; i<num_interfaces; i++) {
752 const char *address = talloc_strdup(tmp_ctx, iface_n_ip(ifaces, i));
755 status = kdc_add_socket(kdc, model_ops,
756 "kdc", address, kdc_port,
757 kdc_process, done_wildcard);
758 NT_STATUS_NOT_OK_RETURN(status);
762 status = kdc_add_socket(kdc, model_ops,
763 "kpasswd", address, kpasswd_port,
764 kpasswdd_process, done_wildcard);
765 NT_STATUS_NOT_OK_RETURN(status);
769 talloc_free(tmp_ctx);
775 static NTSTATUS kdc_check_generic_kerberos(struct irpc_message *msg,
776 struct kdc_check_generic_kerberos *r)
778 struct PAC_Validate pac_validate;
780 struct PAC_SIGNATURE_DATA kdc_sig;
781 struct kdc_server *kdc = talloc_get_type(msg->private_data, struct kdc_server);
782 enum ndr_err_code ndr_err;
786 krb5_principal principal;
787 krb5_keyblock keyblock;
790 /* There is no reply to this request */
791 r->out.generic_reply = data_blob(NULL, 0);
793 ndr_err = ndr_pull_struct_blob(&r->in.generic_request, msg, &pac_validate,
794 (ndr_pull_flags_fn_t)ndr_pull_PAC_Validate);
795 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
796 return NT_STATUS_INVALID_PARAMETER;
799 if (pac_validate.MessageType != 3) {
800 /* We don't implement any other message types - such as certificate validation - yet */
801 return NT_STATUS_INVALID_PARAMETER;
804 if (pac_validate.ChecksumAndSignature.length != (pac_validate.ChecksumLength + pac_validate.SignatureLength)
805 || pac_validate.ChecksumAndSignature.length < pac_validate.ChecksumLength
806 || pac_validate.ChecksumAndSignature.length < pac_validate.SignatureLength ) {
807 return NT_STATUS_INVALID_PARAMETER;
810 srv_sig = data_blob_const(pac_validate.ChecksumAndSignature.data,
811 pac_validate.ChecksumLength);
813 if (pac_validate.SignatureType == CKSUMTYPE_HMAC_MD5) {
814 etype = ETYPE_ARCFOUR_HMAC_MD5;
816 ret = krb5_cksumtype_to_enctype(kdc->smb_krb5_context->krb5_context, pac_validate.SignatureType,
819 return NT_STATUS_LOGON_FAILURE;
823 ret = krb5_make_principal(kdc->smb_krb5_context->krb5_context, &principal,
824 lpcfg_realm(kdc->task->lp_ctx),
825 "krbtgt", lpcfg_realm(kdc->task->lp_ctx),
829 return NT_STATUS_NO_MEMORY;
832 ret = kdc->config->db[0]->hdb_fetch_kvno(kdc->smb_krb5_context->krb5_context,
835 HDB_F_GET_KRBTGT | HDB_F_DECRYPT,
840 hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
841 krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
843 return NT_STATUS_LOGON_FAILURE;
846 ret = hdb_enctype2key(kdc->smb_krb5_context->krb5_context, &ent.entry, etype, &key);
849 hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
850 krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
851 return NT_STATUS_LOGON_FAILURE;
856 kdc_sig.type = pac_validate.SignatureType;
857 kdc_sig.signature = data_blob_const(&pac_validate.ChecksumAndSignature.data[pac_validate.ChecksumLength],
858 pac_validate.SignatureLength);
859 ret = check_pac_checksum(msg, srv_sig, &kdc_sig,
860 kdc->smb_krb5_context->krb5_context, &keyblock);
862 hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
863 krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
866 return NT_STATUS_LOGON_FAILURE;
876 static void kdc_task_init(struct task_server *task)
878 struct kdc_server *kdc;
881 struct interface *ifaces;
884 switch (lpcfg_server_role(task->lp_ctx)) {
885 case ROLE_STANDALONE:
886 task_server_terminate(task, "kdc: no KDC required in standalone configuration", false);
888 case ROLE_DOMAIN_MEMBER:
889 task_server_terminate(task, "kdc: no KDC required in member server configuration", false);
891 case ROLE_DOMAIN_CONTROLLER:
892 /* Yes, we want a KDC */
896 load_interfaces(task, lpcfg_interfaces(task->lp_ctx), &ifaces);
898 if (iface_count(ifaces) == 0) {
899 task_server_terminate(task, "kdc: no network interfaces configured", false);
903 task_server_set_title(task, "task[kdc]");
905 kdc = talloc_zero(task, struct kdc_server);
907 task_server_terminate(task, "kdc: out of memory", true);
914 /* get a samdb connection */
915 kdc->samdb = samdb_connect(kdc, kdc->task->event_ctx, kdc->task->lp_ctx,
916 system_session(kdc->task->lp_ctx), 0);
918 DEBUG(1,("kdc_task_init: unable to connect to samdb\n"));
919 task_server_terminate(task, "kdc: krb5_init_context samdb connect failed", true);
923 ldb_ret = samdb_rodc(kdc->samdb, &kdc->am_rodc);
924 if (ldb_ret != LDB_SUCCESS) {
925 DEBUG(1, ("kdc_task_init: Cannot determine if we are an RODC: %s\n",
926 ldb_errstring(kdc->samdb)));
927 task_server_terminate(task, "kdc: krb5_init_context samdb RODC connect failed", true);
931 kdc->proxy_timeout = lpcfg_parm_int(kdc->task->lp_ctx, NULL, "kdc", "proxy timeout", 5);
933 initialize_krb5_error_table();
935 ret = smb_krb5_init_context(kdc, task->event_ctx, task->lp_ctx, &kdc->smb_krb5_context);
937 DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
938 error_message(ret)));
939 task_server_terminate(task, "kdc: krb5_init_context failed", true);
943 krb5_add_et_list(kdc->smb_krb5_context->krb5_context, initialize_hdb_error_table_r);
945 ret = krb5_kdc_get_config(kdc->smb_krb5_context->krb5_context,
948 task_server_terminate(task, "kdc: failed to get KDC configuration", true);
952 kdc->config->logf = kdc->smb_krb5_context->logf;
953 kdc->config->db = talloc(kdc, struct HDB *);
954 if (!kdc->config->db) {
955 task_server_terminate(task, "kdc: out of memory", true);
958 kdc->config->num_db = 1;
960 /* Register hdb-samba4 hooks for use as a keytab */
962 kdc->base_ctx = talloc_zero(kdc, struct samba_kdc_base_context);
963 if (!kdc->base_ctx) {
964 task_server_terminate(task, "kdc: out of memory", true);
968 kdc->base_ctx->ev_ctx = task->event_ctx;
969 kdc->base_ctx->lp_ctx = task->lp_ctx;
971 status = hdb_samba4_create_kdc(kdc->base_ctx,
972 kdc->smb_krb5_context->krb5_context,
973 &kdc->config->db[0]);
974 if (!NT_STATUS_IS_OK(status)) {
975 task_server_terminate(task, "kdc: hdb_samba4_create_kdc (setup KDC database) failed", true);
979 ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
980 PLUGIN_TYPE_DATA, "hdb",
983 task_server_terminate(task, "kdc: failed to register hdb plugin", true);
987 ret = krb5_kt_register(kdc->smb_krb5_context->krb5_context, &hdb_kt_ops);
989 task_server_terminate(task, "kdc: failed to register keytab plugin", true);
993 /* Register WinDC hooks */
994 ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
995 PLUGIN_TYPE_DATA, "windc",
996 &windc_plugin_table);
998 task_server_terminate(task, "kdc: failed to register windc plugin", true);
1002 ret = krb5_kdc_windc_init(kdc->smb_krb5_context->krb5_context);
1005 task_server_terminate(task, "kdc: failed to init windc plugin", true);
1009 ret = krb5_kdc_pkinit_config(kdc->smb_krb5_context->krb5_context, kdc->config);
1012 task_server_terminate(task, "kdc: failed to init kdc pkinit subsystem", true);
1016 /* start listening on the configured network interfaces */
1017 status = kdc_startup_interfaces(kdc, task->lp_ctx, ifaces);
1018 if (!NT_STATUS_IS_OK(status)) {
1019 task_server_terminate(task, "kdc failed to setup interfaces", true);
1023 status = IRPC_REGISTER(task->msg_ctx, irpc, KDC_CHECK_GENERIC_KERBEROS,
1024 kdc_check_generic_kerberos, kdc);
1025 if (!NT_STATUS_IS_OK(status)) {
1026 task_server_terminate(task, "kdc failed to setup monitoring", true);
1030 irpc_add_name(task->msg_ctx, "kdc_server");
1034 /* called at smbd startup - register ourselves as a server service */
1035 NTSTATUS server_service_kdc_init(void)
1037 return register_server_service("kdc", kdc_task_init);