#include "includes.h"
#include "smbd/process_model.h"
#include "lib/tsocket/tsocket.h"
-#include "libcli/util/tstream.h"
#include "lib/messaging/irpc.h"
#include "librpc/gen_ndr/ndr_irpc.h"
#include "librpc/gen_ndr/ndr_krb5pac.h"
-#include "lib/stream/packet.h"
#include "lib/socket/netif.h"
#include "param/param.h"
#include "kdc/kdc-server.h"
extern struct krb5plugin_windc_ftable windc_plugin_table;
-static NTSTATUS kdc_proxy_unavailable_error(struct kdc_server *kdc,
- TALLOC_CTX *mem_ctx,
- DATA_BLOB *out)
-{
- int kret;
- krb5_data k5_error_blob;
-
- kret = smb_krb5_mk_error(kdc->smb_krb5_context->krb5_context,
- KRB5KDC_ERR_SVC_UNAVAILABLE,
- NULL,
- NULL,
- &k5_error_blob);
- if (kret != 0) {
- DEBUG(2,(__location__ ": Unable to form krb5 error reply\n"));
- return NT_STATUS_INTERNAL_ERROR;
- }
-
- *out = data_blob_talloc(mem_ctx, k5_error_blob.data, k5_error_blob.length);
- kerberos_free_data_contents(kdc->smb_krb5_context->krb5_context,
- &k5_error_blob);
- if (!out->data) {
- return NT_STATUS_NO_MEMORY;
- }
-
- return NT_STATUS_OK;
-}
-
-struct kdc_tcp_call {
- struct kdc_tcp_connection *kdc_conn;
- DATA_BLOB in;
- DATA_BLOB out;
- uint8_t out_hdr[4];
- struct iovec out_iov[2];
-};
-
-/*
- state of an open tcp connection
-*/
-struct kdc_tcp_connection {
- /* stream connection we belong to */
- struct stream_connection *conn;
-
- /* the kdc_server the connection belongs to */
- struct kdc_socket *kdc_socket;
-
- struct tstream_context *tstream;
-
- struct tevent_queue *send_queue;
-};
-
-
-static void kdc_tcp_terminate_connection(struct kdc_tcp_connection *kdcconn, const char *reason)
-{
- stream_terminate_connection(kdcconn->conn, reason);
-}
-
-static void kdc_tcp_recv(struct stream_connection *conn, uint16_t flags)
-{
- struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private_data,
- struct kdc_tcp_connection);
- /* this should never be triggered! */
- kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_recv: called");
-}
-
-static void kdc_tcp_send(struct stream_connection *conn, uint16_t flags)
-{
- struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private_data,
- struct kdc_tcp_connection);
- /* this should never be triggered! */
- kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_send: called");
-}
-
/**
Wrapper for krb5_kdc_process_krb5_request, converting to/from Samba
calling conventions
return KDC_OK;
}
-static void kdc_tcp_call_proxy_done(struct tevent_req *subreq);
-static void kdc_tcp_call_writev_done(struct tevent_req *subreq);
-
-static void kdc_tcp_call_loop(struct tevent_req *subreq)
-{
- struct kdc_tcp_connection *kdc_conn = tevent_req_callback_data(subreq,
- struct kdc_tcp_connection);
- struct kdc_tcp_call *call;
- NTSTATUS status;
- kdc_code ret;
-
- call = talloc(kdc_conn, struct kdc_tcp_call);
- if (call == NULL) {
- kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
- "no memory for kdc_tcp_call");
- return;
- }
- call->kdc_conn = kdc_conn;
-
- status = tstream_read_pdu_blob_recv(subreq,
- call,
- &call->in);
- TALLOC_FREE(subreq);
- if (!NT_STATUS_IS_OK(status)) {
- const char *reason;
-
- reason = talloc_asprintf(call, "kdc_tcp_call_loop: "
- "tstream_read_pdu_blob_recv() - %s",
- nt_errstr(status));
- if (!reason) {
- reason = nt_errstr(status);
- }
-
- kdc_tcp_terminate_connection(kdc_conn, reason);
- return;
- }
-
- DEBUG(10,("Received krb5 TCP packet of length %lu from %s\n",
- (long) call->in.length,
- tsocket_address_string(kdc_conn->conn->remote_address, call)));
-
- /* skip length header */
- call->in.data +=4;
- call->in.length -= 4;
-
- /* Call krb5 */
- ret = kdc_conn->kdc_socket->process(kdc_conn->kdc_socket->kdc,
- call,
- &call->in,
- &call->out,
- kdc_conn->conn->remote_address,
- kdc_conn->conn->local_address,
- 0 /* Stream */);
- if (ret == KDC_ERROR) {
- kdc_tcp_terminate_connection(kdc_conn,
- "kdc_tcp_call_loop: process function failed");
- return;
- }
-
- if (ret == KDC_PROXY_REQUEST) {
- uint16_t port;
-
- if (!kdc_conn->kdc_socket->kdc->am_rodc) {
- kdc_tcp_terminate_connection(kdc_conn,
- "kdc_tcp_call_loop: proxying requested when not RODC");
- return;
- }
- port = tsocket_address_inet_port(kdc_conn->conn->local_address);
-
- subreq = kdc_tcp_proxy_send(call,
- kdc_conn->conn->event.ctx,
- kdc_conn->kdc_socket->kdc,
- port,
- call->in);
- if (subreq == NULL) {
- kdc_tcp_terminate_connection(kdc_conn,
- "kdc_tcp_call_loop: kdc_tcp_proxy_send failed");
- return;
- }
- tevent_req_set_callback(subreq, kdc_tcp_call_proxy_done, call);
- return;
- }
-
- /* First add the length of the out buffer */
- RSIVAL(call->out_hdr, 0, call->out.length);
- call->out_iov[0].iov_base = (char *) call->out_hdr;
- call->out_iov[0].iov_len = 4;
-
- call->out_iov[1].iov_base = (char *) call->out.data;
- call->out_iov[1].iov_len = call->out.length;
-
- subreq = tstream_writev_queue_send(call,
- kdc_conn->conn->event.ctx,
- kdc_conn->tstream,
- kdc_conn->send_queue,
- call->out_iov, 2);
- if (subreq == NULL) {
- kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
- "no memory for tstream_writev_queue_send");
- return;
- }
- tevent_req_set_callback(subreq, kdc_tcp_call_writev_done, call);
-
- /*
- * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
- * packet_full_request_u32 provides the pdu length then.
- */
- subreq = tstream_read_pdu_blob_send(kdc_conn,
- kdc_conn->conn->event.ctx,
- kdc_conn->tstream,
- 4, /* initial_read_size */
- packet_full_request_u32,
- kdc_conn);
- if (subreq == NULL) {
- kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
- "no memory for tstream_read_pdu_blob_send");
- return;
- }
- tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
-}
-
-static void kdc_tcp_call_proxy_done(struct tevent_req *subreq)
-{
- struct kdc_tcp_call *call = tevent_req_callback_data(subreq,
- struct kdc_tcp_call);
- struct kdc_tcp_connection *kdc_conn = call->kdc_conn;
- NTSTATUS status;
-
- status = kdc_tcp_proxy_recv(subreq, call, &call->out);
- TALLOC_FREE(subreq);
- if (!NT_STATUS_IS_OK(status)) {
- /* generate an error packet */
- status = kdc_proxy_unavailable_error(kdc_conn->kdc_socket->kdc,
- call, &call->out);
- }
-
- if (!NT_STATUS_IS_OK(status)) {
- const char *reason;
-
- reason = talloc_asprintf(call, "kdc_tcp_call_proxy_done: "
- "kdc_proxy_unavailable_error - %s",
- nt_errstr(status));
- if (!reason) {
- reason = "kdc_tcp_call_proxy_done: kdc_proxy_unavailable_error() failed";
- }
-
- kdc_tcp_terminate_connection(call->kdc_conn, reason);
- return;
- }
-
- /* First add the length of the out buffer */
- RSIVAL(call->out_hdr, 0, call->out.length);
- call->out_iov[0].iov_base = (char *) call->out_hdr;
- call->out_iov[0].iov_len = 4;
-
- call->out_iov[1].iov_base = (char *) call->out.data;
- call->out_iov[1].iov_len = call->out.length;
-
- subreq = tstream_writev_queue_send(call,
- kdc_conn->conn->event.ctx,
- kdc_conn->tstream,
- kdc_conn->send_queue,
- call->out_iov, 2);
- if (subreq == NULL) {
- kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
- "no memory for tstream_writev_queue_send");
- return;
- }
- tevent_req_set_callback(subreq, kdc_tcp_call_writev_done, call);
-
- /*
- * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
- * packet_full_request_u32 provides the pdu length then.
- */
- subreq = tstream_read_pdu_blob_send(kdc_conn,
- kdc_conn->conn->event.ctx,
- kdc_conn->tstream,
- 4, /* initial_read_size */
- packet_full_request_u32,
- kdc_conn);
- if (subreq == NULL) {
- kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
- "no memory for tstream_read_pdu_blob_send");
- return;
- }
- tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
-}
-
-static void kdc_tcp_call_writev_done(struct tevent_req *subreq)
-{
- struct kdc_tcp_call *call = tevent_req_callback_data(subreq,
- struct kdc_tcp_call);
- int sys_errno;
- int rc;
-
- rc = tstream_writev_queue_recv(subreq, &sys_errno);
- TALLOC_FREE(subreq);
- if (rc == -1) {
- const char *reason;
-
- reason = talloc_asprintf(call, "kdc_tcp_call_writev_done: "
- "tstream_writev_queue_recv() - %d:%s",
- sys_errno, strerror(sys_errno));
- if (!reason) {
- reason = "kdc_tcp_call_writev_done: tstream_writev_queue_recv() failed";
- }
-
- kdc_tcp_terminate_connection(call->kdc_conn, reason);
- return;
- }
-
- /* We don't care about errors */
-
- talloc_free(call);
-}
-
-/*
- called when we get a new connection
-*/
-static void kdc_tcp_accept(struct stream_connection *conn)
-{
- struct kdc_socket *kdc_socket;
- struct kdc_tcp_connection *kdc_conn;
- struct tevent_req *subreq;
- int rc;
-
- kdc_conn = talloc_zero(conn, struct kdc_tcp_connection);
- if (kdc_conn == NULL) {
- stream_terminate_connection(conn,
- "kdc_tcp_accept: out of memory");
- return;
- }
-
- kdc_conn->send_queue = tevent_queue_create(conn, "kdc_tcp_accept");
- if (kdc_conn->send_queue == NULL) {
- stream_terminate_connection(conn,
- "kdc_tcp_accept: out of memory");
- return;
- }
-
- kdc_socket = talloc_get_type(conn->private_data, struct kdc_socket);
-
- TALLOC_FREE(conn->event.fde);
-
- rc = tstream_bsd_existing_socket(kdc_conn,
- socket_get_fd(conn->socket),
- &kdc_conn->tstream);
- if (rc < 0) {
- stream_terminate_connection(conn,
- "kdc_tcp_accept: out of memory");
- return;
- }
-
- kdc_conn->conn = conn;
- kdc_conn->kdc_socket = kdc_socket;
- conn->private_data = kdc_conn;
-
- /*
- * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
- * packet_full_request_u32 provides the pdu length then.
- */
- subreq = tstream_read_pdu_blob_send(kdc_conn,
- kdc_conn->conn->event.ctx,
- kdc_conn->tstream,
- 4, /* initial_read_size */
- packet_full_request_u32,
- kdc_conn);
- if (subreq == NULL) {
- kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_accept: "
- "no memory for tstream_read_pdu_blob_send");
- return;
- }
- tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
-}
-
-static const struct stream_server_ops kdc_tcp_stream_ops = {
- .name = "kdc_tcp",
- .accept_connection = kdc_tcp_accept,
- .recv_handler = kdc_tcp_recv,
- .send_handler = kdc_tcp_send
-};
-
-struct kdc_udp_call {
- struct kdc_udp_socket *sock;
- struct tsocket_address *src;
- DATA_BLOB in;
- DATA_BLOB out;
-};
-
-static void kdc_udp_call_proxy_done(struct tevent_req *subreq);
-static void kdc_udp_call_sendto_done(struct tevent_req *subreq);
-
-static void kdc_udp_call_loop(struct tevent_req *subreq)
-{
- struct kdc_udp_socket *sock = tevent_req_callback_data(subreq,
- struct kdc_udp_socket);
- struct kdc_udp_call *call;
- uint8_t *buf;
- ssize_t len;
- int sys_errno;
- kdc_code ret;
-
- call = talloc(sock, struct kdc_udp_call);
- if (call == NULL) {
- talloc_free(call);
- goto done;
- }
- call->sock = sock;
-
- len = tdgram_recvfrom_recv(subreq, &sys_errno,
- call, &buf, &call->src);
- TALLOC_FREE(subreq);
- if (len == -1) {
- talloc_free(call);
- goto done;
- }
-
- call->in.data = buf;
- call->in.length = len;
-
- DEBUG(10,("Received krb5 UDP packet of length %lu from %s\n",
- (long)call->in.length,
- tsocket_address_string(call->src, call)));
-
- /* Call krb5 */
- ret = sock->kdc_socket->process(sock->kdc_socket->kdc,
- call,
- &call->in,
- &call->out,
- call->src,
- sock->kdc_socket->local_address,
- 1 /* Datagram */);
- if (ret == KDC_ERROR) {
- talloc_free(call);
- goto done;
- }
-
- if (ret == KDC_PROXY_REQUEST) {
- uint16_t port;
-
- if (!sock->kdc_socket->kdc->am_rodc) {
- DEBUG(0,("kdc_udp_call_loop: proxying requested when not RODC"));
- talloc_free(call);
- goto done;
- }
-
- port = tsocket_address_inet_port(sock->kdc_socket->local_address);
-
- subreq = kdc_udp_proxy_send(call,
- sock->kdc_socket->kdc->task->event_ctx,
- sock->kdc_socket->kdc,
- port,
- call->in);
- if (subreq == NULL) {
- talloc_free(call);
- goto done;
- }
- tevent_req_set_callback(subreq, kdc_udp_call_proxy_done, call);
- goto done;
- }
-
- subreq = tdgram_sendto_queue_send(call,
- sock->kdc_socket->kdc->task->event_ctx,
- sock->dgram,
- sock->send_queue,
- call->out.data,
- call->out.length,
- call->src);
- if (subreq == NULL) {
- talloc_free(call);
- goto done;
- }
- tevent_req_set_callback(subreq, kdc_udp_call_sendto_done, call);
-
-done:
- subreq = tdgram_recvfrom_send(sock,
- sock->kdc_socket->kdc->task->event_ctx,
- sock->dgram);
- if (subreq == NULL) {
- task_server_terminate(sock->kdc_socket->kdc->task,
- "no memory for tdgram_recvfrom_send",
- true);
- return;
- }
- tevent_req_set_callback(subreq, kdc_udp_call_loop, sock);
-}
-
-static void kdc_udp_call_proxy_done(struct tevent_req *subreq)
-{
- struct kdc_udp_call *call =
- tevent_req_callback_data(subreq,
- struct kdc_udp_call);
- NTSTATUS status;
-
- status = kdc_udp_proxy_recv(subreq, call, &call->out);
- TALLOC_FREE(subreq);
- if (!NT_STATUS_IS_OK(status)) {
- /* generate an error packet */
- status = kdc_proxy_unavailable_error(call->sock->kdc_socket->kdc,
- call, &call->out);
- }
-
- if (!NT_STATUS_IS_OK(status)) {
- talloc_free(call);
- return;
- }
-
- subreq = tdgram_sendto_queue_send(call,
- call->sock->kdc_socket->kdc->task->event_ctx,
- call->sock->dgram,
- call->sock->send_queue,
- call->out.data,
- call->out.length,
- call->src);
- if (subreq == NULL) {
- talloc_free(call);
- return;
- }
-
- tevent_req_set_callback(subreq, kdc_udp_call_sendto_done, call);
-}
-
-static void kdc_udp_call_sendto_done(struct tevent_req *subreq)
-{
- struct kdc_udp_call *call = tevent_req_callback_data(subreq,
- struct kdc_udp_call);
- int sys_errno;
-
- tdgram_sendto_queue_recv(subreq, &sys_errno);
-
- /* We don't care about errors */
-
- talloc_free(call);
-}
-
-/*
- start listening on the given address
-*/
-static NTSTATUS kdc_add_socket(struct kdc_server *kdc,
- const struct model_ops *model_ops,
- const char *name,
- const char *address,
- uint16_t port,
- kdc_process_fn_t process,
- bool udp_only)
-{
- struct kdc_socket *kdc_socket;
- struct kdc_udp_socket *kdc_udp_socket;
- struct tevent_req *udpsubreq;
- NTSTATUS status;
- int ret;
-
- kdc_socket = talloc(kdc, struct kdc_socket);
- NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
-
- kdc_socket->kdc = kdc;
- kdc_socket->process = process;
-
- ret = tsocket_address_inet_from_strings(kdc_socket, "ip",
- address, port,
- &kdc_socket->local_address);
- if (ret != 0) {
- status = map_nt_error_from_unix_common(errno);
- return status;
- }
-
- if (!udp_only) {
- status = stream_setup_socket(kdc->task,
- kdc->task->event_ctx,
- kdc->task->lp_ctx,
- model_ops,
- &kdc_tcp_stream_ops,
- "ip", address, &port,
- lpcfg_socket_options(kdc->task->lp_ctx),
- kdc_socket);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
- address, port, nt_errstr(status)));
- talloc_free(kdc_socket);
- return status;
- }
- }
-
- kdc_udp_socket = talloc(kdc_socket, struct kdc_udp_socket);
- NT_STATUS_HAVE_NO_MEMORY(kdc_udp_socket);
-
- kdc_udp_socket->kdc_socket = kdc_socket;
-
- ret = tdgram_inet_udp_socket(kdc_socket->local_address,
- NULL,
- kdc_udp_socket,
- &kdc_udp_socket->dgram);
- if (ret != 0) {
- status = map_nt_error_from_unix_common(errno);
- DEBUG(0,("Failed to bind to %s:%u UDP - %s\n",
- address, port, nt_errstr(status)));
- return status;
- }
-
- kdc_udp_socket->send_queue = tevent_queue_create(kdc_udp_socket,
- "kdc_udp_send_queue");
- NT_STATUS_HAVE_NO_MEMORY(kdc_udp_socket->send_queue);
-
- udpsubreq = tdgram_recvfrom_send(kdc_udp_socket,
- kdc->task->event_ctx,
- kdc_udp_socket->dgram);
- NT_STATUS_HAVE_NO_MEMORY(udpsubreq);
- tevent_req_set_callback(udpsubreq, kdc_udp_call_loop, kdc_udp_socket);
-
- return NT_STATUS_OK;
-}
-
-
/*
setup our listening sockets on the configured network interfaces
*/
--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+
+ KDC related functions
+
+ Copyright (c) 2005-2008 Andrew Bartlett <abartlet@samba.org>
+ Copyright (c) 2005 Andrew Tridgell <tridge@samba.org>
+ Copyright (c) 2005 Stefan Metzmacher <metze@samba.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "param/param.h"
+#include "smbd/process_model.h"
+#include "lib/tsocket/tsocket.h"
+#include "libcli/util/tstream.h"
+#include "kdc/kdc-server.h"
+#include "kdc/kdc-proxy.h"
+#include "lib/stream/packet.h"
+
+/*
+ * State of an open tcp connection
+ */
+struct kdc_tcp_connection {
+ /* stream connection we belong to */
+ struct stream_connection *conn;
+
+ /* the kdc_server the connection belongs to */
+ struct kdc_socket *kdc_socket;
+
+ struct tstream_context *tstream;
+
+ struct tevent_queue *send_queue;
+};
+
+struct kdc_tcp_call {
+ struct kdc_tcp_connection *kdc_conn;
+ DATA_BLOB in;
+ DATA_BLOB out;
+ uint8_t out_hdr[4];
+ struct iovec out_iov[2];
+};
+
+struct kdc_udp_call {
+ struct kdc_udp_socket *sock;
+ struct tsocket_address *src;
+ DATA_BLOB in;
+ DATA_BLOB out;
+};
+
+static void kdc_udp_call_proxy_done(struct tevent_req *subreq);
+static void kdc_udp_call_sendto_done(struct tevent_req *subreq);
+
+static void kdc_tcp_call_writev_done(struct tevent_req *subreq);
+static void kdc_tcp_call_proxy_done(struct tevent_req *subreq);
+
+static void kdc_tcp_terminate_connection(struct kdc_tcp_connection *kdc_conn,
+ const char *reason)
+{
+ stream_terminate_connection(kdc_conn->conn, reason);
+}
+
+static NTSTATUS kdc_proxy_unavailable_error(struct kdc_server *kdc,
+ TALLOC_CTX *mem_ctx,
+ DATA_BLOB *out)
+{
+ krb5_error_code code;
+ krb5_data enc_error;
+
+ code = smb_krb5_mk_error(kdc->smb_krb5_context->krb5_context,
+ KRB5KDC_ERR_SVC_UNAVAILABLE,
+ NULL,
+ NULL,
+ &enc_error);
+ if (code != 0) {
+ DBG_WARNING("Unable to form krb5 error reply\n");
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ *out = data_blob_talloc(mem_ctx, enc_error.data, enc_error.length);
+ kerberos_free_data_contents(kdc->smb_krb5_context->krb5_context,
+ &enc_error);
+ if (!out->data) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ return NT_STATUS_OK;
+}
+
+static void kdc_udp_call_loop(struct tevent_req *subreq)
+{
+ struct kdc_udp_socket *sock = tevent_req_callback_data(subreq,
+ struct kdc_udp_socket);
+ struct kdc_udp_call *call;
+ uint8_t *buf;
+ ssize_t len;
+ int sys_errno;
+ kdc_code ret;
+
+ call = talloc(sock, struct kdc_udp_call);
+ if (call == NULL) {
+ talloc_free(call);
+ goto done;
+ }
+ call->sock = sock;
+
+ len = tdgram_recvfrom_recv(subreq, &sys_errno,
+ call, &buf, &call->src);
+ TALLOC_FREE(subreq);
+ if (len == -1) {
+ talloc_free(call);
+ goto done;
+ }
+
+ call->in.data = buf;
+ call->in.length = len;
+
+ DEBUG(10,("Received krb5 UDP packet of length %lu from %s\n",
+ (long)call->in.length,
+ tsocket_address_string(call->src, call)));
+
+ /* Call krb5 */
+ ret = sock->kdc_socket->process(sock->kdc_socket->kdc,
+ call,
+ &call->in,
+ &call->out,
+ call->src,
+ sock->kdc_socket->local_address,
+ 1 /* Datagram */);
+ if (ret == KDC_ERROR) {
+ talloc_free(call);
+ goto done;
+ }
+
+ if (ret == KDC_PROXY_REQUEST) {
+ uint16_t port;
+
+ if (!sock->kdc_socket->kdc->am_rodc) {
+ DEBUG(0,("kdc_udp_call_loop: proxying requested when not RODC"));
+ talloc_free(call);
+ goto done;
+ }
+
+ port = tsocket_address_inet_port(sock->kdc_socket->local_address);
+
+ subreq = kdc_udp_proxy_send(call,
+ sock->kdc_socket->kdc->task->event_ctx,
+ sock->kdc_socket->kdc,
+ port,
+ call->in);
+ if (subreq == NULL) {
+ talloc_free(call);
+ goto done;
+ }
+ tevent_req_set_callback(subreq, kdc_udp_call_proxy_done, call);
+ goto done;
+ }
+
+ subreq = tdgram_sendto_queue_send(call,
+ sock->kdc_socket->kdc->task->event_ctx,
+ sock->dgram,
+ sock->send_queue,
+ call->out.data,
+ call->out.length,
+ call->src);
+ if (subreq == NULL) {
+ talloc_free(call);
+ goto done;
+ }
+ tevent_req_set_callback(subreq, kdc_udp_call_sendto_done, call);
+
+done:
+ subreq = tdgram_recvfrom_send(sock,
+ sock->kdc_socket->kdc->task->event_ctx,
+ sock->dgram);
+ if (subreq == NULL) {
+ task_server_terminate(sock->kdc_socket->kdc->task,
+ "no memory for tdgram_recvfrom_send",
+ true);
+ return;
+ }
+ tevent_req_set_callback(subreq, kdc_udp_call_loop, sock);
+}
+
+static void kdc_udp_call_proxy_done(struct tevent_req *subreq)
+{
+ struct kdc_udp_call *call =
+ tevent_req_callback_data(subreq,
+ struct kdc_udp_call);
+ NTSTATUS status;
+
+ status = kdc_udp_proxy_recv(subreq, call, &call->out);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ /* generate an error packet */
+ status = kdc_proxy_unavailable_error(call->sock->kdc_socket->kdc,
+ call, &call->out);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(call);
+ return;
+ }
+
+ subreq = tdgram_sendto_queue_send(call,
+ call->sock->kdc_socket->kdc->task->event_ctx,
+ call->sock->dgram,
+ call->sock->send_queue,
+ call->out.data,
+ call->out.length,
+ call->src);
+ if (subreq == NULL) {
+ talloc_free(call);
+ return;
+ }
+
+ tevent_req_set_callback(subreq, kdc_udp_call_sendto_done, call);
+}
+
+static void kdc_udp_call_sendto_done(struct tevent_req *subreq)
+{
+ struct kdc_udp_call *call = tevent_req_callback_data(subreq,
+ struct kdc_udp_call);
+ int sys_errno;
+
+ tdgram_sendto_queue_recv(subreq, &sys_errno);
+
+ /* We don't care about errors */
+
+ talloc_free(call);
+}
+
+static void kdc_tcp_call_loop(struct tevent_req *subreq)
+{
+ struct kdc_tcp_connection *kdc_conn = tevent_req_callback_data(subreq,
+ struct kdc_tcp_connection);
+ struct kdc_tcp_call *call;
+ NTSTATUS status;
+ kdc_code ret;
+
+ call = talloc(kdc_conn, struct kdc_tcp_call);
+ if (call == NULL) {
+ kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
+ "no memory for kdc_tcp_call");
+ return;
+ }
+ call->kdc_conn = kdc_conn;
+
+ status = tstream_read_pdu_blob_recv(subreq,
+ call,
+ &call->in);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ const char *reason;
+
+ reason = talloc_asprintf(call, "kdc_tcp_call_loop: "
+ "tstream_read_pdu_blob_recv() - %s",
+ nt_errstr(status));
+ if (!reason) {
+ reason = nt_errstr(status);
+ }
+
+ kdc_tcp_terminate_connection(kdc_conn, reason);
+ return;
+ }
+
+ DEBUG(10,("Received krb5 TCP packet of length %lu from %s\n",
+ (long) call->in.length,
+ tsocket_address_string(kdc_conn->conn->remote_address, call)));
+
+ /* skip length header */
+ call->in.data +=4;
+ call->in.length -= 4;
+
+ /* Call krb5 */
+ ret = kdc_conn->kdc_socket->process(kdc_conn->kdc_socket->kdc,
+ call,
+ &call->in,
+ &call->out,
+ kdc_conn->conn->remote_address,
+ kdc_conn->conn->local_address,
+ 0 /* Stream */);
+ if (ret == KDC_ERROR) {
+ kdc_tcp_terminate_connection(kdc_conn,
+ "kdc_tcp_call_loop: process function failed");
+ return;
+ }
+
+ if (ret == KDC_PROXY_REQUEST) {
+ uint16_t port;
+
+ if (!kdc_conn->kdc_socket->kdc->am_rodc) {
+ kdc_tcp_terminate_connection(kdc_conn,
+ "kdc_tcp_call_loop: proxying requested when not RODC");
+ return;
+ }
+ port = tsocket_address_inet_port(kdc_conn->conn->local_address);
+
+ subreq = kdc_tcp_proxy_send(call,
+ kdc_conn->conn->event.ctx,
+ kdc_conn->kdc_socket->kdc,
+ port,
+ call->in);
+ if (subreq == NULL) {
+ kdc_tcp_terminate_connection(kdc_conn,
+ "kdc_tcp_call_loop: kdc_tcp_proxy_send failed");
+ return;
+ }
+ tevent_req_set_callback(subreq, kdc_tcp_call_proxy_done, call);
+ return;
+ }
+
+ /* First add the length of the out buffer */
+ RSIVAL(call->out_hdr, 0, call->out.length);
+ call->out_iov[0].iov_base = (char *) call->out_hdr;
+ call->out_iov[0].iov_len = 4;
+
+ call->out_iov[1].iov_base = (char *) call->out.data;
+ call->out_iov[1].iov_len = call->out.length;
+
+ subreq = tstream_writev_queue_send(call,
+ kdc_conn->conn->event.ctx,
+ kdc_conn->tstream,
+ kdc_conn->send_queue,
+ call->out_iov, 2);
+ if (subreq == NULL) {
+ kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
+ "no memory for tstream_writev_queue_send");
+ return;
+ }
+ tevent_req_set_callback(subreq, kdc_tcp_call_writev_done, call);
+
+ /*
+ * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
+ * packet_full_request_u32 provides the pdu length then.
+ */
+ subreq = tstream_read_pdu_blob_send(kdc_conn,
+ kdc_conn->conn->event.ctx,
+ kdc_conn->tstream,
+ 4, /* initial_read_size */
+ packet_full_request_u32,
+ kdc_conn);
+ if (subreq == NULL) {
+ kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
+ "no memory for tstream_read_pdu_blob_send");
+ return;
+ }
+ tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
+}
+
+static void kdc_tcp_call_proxy_done(struct tevent_req *subreq)
+{
+ struct kdc_tcp_call *call = tevent_req_callback_data(subreq,
+ struct kdc_tcp_call);
+ struct kdc_tcp_connection *kdc_conn = call->kdc_conn;
+ NTSTATUS status;
+
+ status = kdc_tcp_proxy_recv(subreq, call, &call->out);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ /* generate an error packet */
+ status = kdc_proxy_unavailable_error(kdc_conn->kdc_socket->kdc,
+ call, &call->out);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ const char *reason;
+
+ reason = talloc_asprintf(call, "kdc_tcp_call_proxy_done: "
+ "kdc_proxy_unavailable_error - %s",
+ nt_errstr(status));
+ if (!reason) {
+ reason = "kdc_tcp_call_proxy_done: kdc_proxy_unavailable_error() failed";
+ }
+
+ kdc_tcp_terminate_connection(call->kdc_conn, reason);
+ return;
+ }
+
+ /* First add the length of the out buffer */
+ RSIVAL(call->out_hdr, 0, call->out.length);
+ call->out_iov[0].iov_base = (char *) call->out_hdr;
+ call->out_iov[0].iov_len = 4;
+
+ call->out_iov[1].iov_base = (char *) call->out.data;
+ call->out_iov[1].iov_len = call->out.length;
+
+ subreq = tstream_writev_queue_send(call,
+ kdc_conn->conn->event.ctx,
+ kdc_conn->tstream,
+ kdc_conn->send_queue,
+ call->out_iov, 2);
+ if (subreq == NULL) {
+ kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
+ "no memory for tstream_writev_queue_send");
+ return;
+ }
+ tevent_req_set_callback(subreq, kdc_tcp_call_writev_done, call);
+
+ /*
+ * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
+ * packet_full_request_u32 provides the pdu length then.
+ */
+ subreq = tstream_read_pdu_blob_send(kdc_conn,
+ kdc_conn->conn->event.ctx,
+ kdc_conn->tstream,
+ 4, /* initial_read_size */
+ packet_full_request_u32,
+ kdc_conn);
+ if (subreq == NULL) {
+ kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_call_loop: "
+ "no memory for tstream_read_pdu_blob_send");
+ return;
+ }
+ tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
+}
+
+static void kdc_tcp_call_writev_done(struct tevent_req *subreq)
+{
+ struct kdc_tcp_call *call = tevent_req_callback_data(subreq,
+ struct kdc_tcp_call);
+ int sys_errno;
+ int rc;
+
+ rc = tstream_writev_queue_recv(subreq, &sys_errno);
+ TALLOC_FREE(subreq);
+ if (rc == -1) {
+ const char *reason;
+
+ reason = talloc_asprintf(call, "kdc_tcp_call_writev_done: "
+ "tstream_writev_queue_recv() - %d:%s",
+ sys_errno, strerror(sys_errno));
+ if (!reason) {
+ reason = "kdc_tcp_call_writev_done: tstream_writev_queue_recv() failed";
+ }
+
+ kdc_tcp_terminate_connection(call->kdc_conn, reason);
+ return;
+ }
+
+ /* We don't care about errors */
+
+ talloc_free(call);
+}
+
+/*
+ called when we get a new connection
+*/
+static void kdc_tcp_accept(struct stream_connection *conn)
+{
+ struct kdc_socket *kdc_socket;
+ struct kdc_tcp_connection *kdc_conn;
+ struct tevent_req *subreq;
+ int rc;
+
+ kdc_conn = talloc_zero(conn, struct kdc_tcp_connection);
+ if (kdc_conn == NULL) {
+ stream_terminate_connection(conn,
+ "kdc_tcp_accept: out of memory");
+ return;
+ }
+
+ kdc_conn->send_queue = tevent_queue_create(conn, "kdc_tcp_accept");
+ if (kdc_conn->send_queue == NULL) {
+ stream_terminate_connection(conn,
+ "kdc_tcp_accept: out of memory");
+ return;
+ }
+
+ kdc_socket = talloc_get_type(conn->private_data, struct kdc_socket);
+
+ TALLOC_FREE(conn->event.fde);
+
+ rc = tstream_bsd_existing_socket(kdc_conn,
+ socket_get_fd(conn->socket),
+ &kdc_conn->tstream);
+ if (rc < 0) {
+ stream_terminate_connection(conn,
+ "kdc_tcp_accept: out of memory");
+ return;
+ }
+
+ kdc_conn->conn = conn;
+ kdc_conn->kdc_socket = kdc_socket;
+ conn->private_data = kdc_conn;
+
+ /*
+ * The krb5 tcp pdu's has the length as 4 byte (initial_read_size),
+ * packet_full_request_u32 provides the pdu length then.
+ */
+ subreq = tstream_read_pdu_blob_send(kdc_conn,
+ kdc_conn->conn->event.ctx,
+ kdc_conn->tstream,
+ 4, /* initial_read_size */
+ packet_full_request_u32,
+ kdc_conn);
+ if (subreq == NULL) {
+ kdc_tcp_terminate_connection(kdc_conn, "kdc_tcp_accept: "
+ "no memory for tstream_read_pdu_blob_send");
+ return;
+ }
+ tevent_req_set_callback(subreq, kdc_tcp_call_loop, kdc_conn);
+}
+
+static void kdc_tcp_recv(struct stream_connection *conn, uint16_t flags)
+{
+ struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private_data,
+ struct kdc_tcp_connection);
+ /* this should never be triggered! */
+ kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_recv: called");
+}
+
+static void kdc_tcp_send(struct stream_connection *conn, uint16_t flags)
+{
+ struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private_data,
+ struct kdc_tcp_connection);
+ /* this should never be triggered! */
+ kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_send: called");
+}
+
+static const struct stream_server_ops kdc_tcp_stream_ops = {
+ .name = "kdc_tcp",
+ .accept_connection = kdc_tcp_accept,
+ .recv_handler = kdc_tcp_recv,
+ .send_handler = kdc_tcp_send
+};
+
+/*
+ * Start listening on the given address
+ */
+NTSTATUS kdc_add_socket(struct kdc_server *kdc,
+ const struct model_ops *model_ops,
+ const char *name,
+ const char *address,
+ uint16_t port,
+ kdc_process_fn_t process,
+ bool udp_only)
+{
+ struct kdc_socket *kdc_socket;
+ struct kdc_udp_socket *kdc_udp_socket;
+ struct tevent_req *udpsubreq;
+ NTSTATUS status;
+ int ret;
+
+ kdc_socket = talloc(kdc, struct kdc_socket);
+ NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
+
+ kdc_socket->kdc = kdc;
+ kdc_socket->process = process;
+
+ ret = tsocket_address_inet_from_strings(kdc_socket, "ip",
+ address, port,
+ &kdc_socket->local_address);
+ if (ret != 0) {
+ status = map_nt_error_from_unix_common(errno);
+ return status;
+ }
+
+ if (!udp_only) {
+ status = stream_setup_socket(kdc->task,
+ kdc->task->event_ctx,
+ kdc->task->lp_ctx,
+ model_ops,
+ &kdc_tcp_stream_ops,
+ "ip", address, &port,
+ lpcfg_socket_options(kdc->task->lp_ctx),
+ kdc_socket);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
+ address, port, nt_errstr(status)));
+ talloc_free(kdc_socket);
+ return status;
+ }
+ }
+
+ kdc_udp_socket = talloc(kdc_socket, struct kdc_udp_socket);
+ NT_STATUS_HAVE_NO_MEMORY(kdc_udp_socket);
+
+ kdc_udp_socket->kdc_socket = kdc_socket;
+
+ ret = tdgram_inet_udp_socket(kdc_socket->local_address,
+ NULL,
+ kdc_udp_socket,
+ &kdc_udp_socket->dgram);
+ if (ret != 0) {
+ status = map_nt_error_from_unix_common(errno);
+ DEBUG(0,("Failed to bind to %s:%u UDP - %s\n",
+ address, port, nt_errstr(status)));
+ return status;
+ }
+
+ kdc_udp_socket->send_queue = tevent_queue_create(kdc_udp_socket,
+ "kdc_udp_send_queue");
+ NT_STATUS_HAVE_NO_MEMORY(kdc_udp_socket->send_queue);
+
+ udpsubreq = tdgram_recvfrom_send(kdc_udp_socket,
+ kdc->task->event_ctx,
+ kdc_udp_socket->dgram);
+ NT_STATUS_HAVE_NO_MEMORY(udpsubreq);
+ tevent_req_set_callback(udpsubreq, kdc_udp_call_loop, kdc_udp_socket);
+
+ return NT_STATUS_OK;
+}
#define _KDC_SERVER_H
#include "system/kerberos.h"
+#include "auth/kerberos/kerberos.h"
struct tsocket_address;
+struct model_ops;
/*
* Context structure for the kdc server
struct tevent_queue *send_queue;
};
+NTSTATUS kdc_add_socket(struct kdc_server *kdc,
+ const struct model_ops *model_ops,
+ const char *name,
+ const char *address,
+ uint16_t port,
+ kdc_process_fn_t process,
+ bool udp_only);
+
#endif /* _KDC_SERVER_H */
kdc_include = getattr(bld.env, "CPPPATH_KDC")
bld.SAMBA_MODULE('service_kdc',
- source='kdc-heimdal.c kpasswd-heimdal.c kdc-proxy.c',
+ source='kdc-heimdal.c kpasswd-heimdal.c',
subsystem='service',
init_function='server_service_kdc_init',
deps='''
HDB_SAMBA4
WDC_SAMBA4
samba-hostconfig
- LIBTSOCKET
- LIBSAMBA_TSOCKET
com_err
samba_server_gensec
PAC_GLUE
KDC-GLUE
+ KDC-SERVER
KPASSWD_GLUE
''',
internal_module=False)
enabled = (bld.CONFIG_SET("USING_SYSTEM_KRB5") and bld.CONFIG_SET("USING_SYSTEM_HDB"))
)
+bld.SAMBA_SUBSYSTEM('KDC-SERVER',
+ source='kdc-server.c kdc-proxy.c',
+ includes=kdc_include,
+ deps='''
+ krb5samba
+ ldb
+ LIBTSOCKET
+ LIBSAMBA_TSOCKET
+ ''',
+ enabled=bld.CONFIG_SET('SAMBA4_USES_HEIMDAL'))
+
bld.SAMBA_SUBSYSTEM('KDC-GLUE',
source='kdc-glue.c',
includes=kdc_include,
git.samba.org / slow / samba.git / commitdiff