*/
#include "includes.h"
-#include "smbd/process_model.h"
+#include "samba/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"
+#include "kdc/kdc-proxy.h"
#include "kdc/kdc-glue.h"
#include "kdc/pac-glue.h"
+#include "kdc/kpasswd-service.h"
#include "dsdb/samdb/samdb.h"
#include "auth/session.h"
#include "libds/common/roles.h"
+#include <kdc.h>
+#include <hdb.h>
-NTSTATUS server_service_kdc_init(void);
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_KERBEROS
-extern struct krb5plugin_windc_ftable windc_plugin_table;
+NTSTATUS server_service_kdc_init(TALLOC_CTX *);
-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 = krb5_mk_error(kdc->smb_krb5_context->krb5_context,
- KRB5KDC_ERR_SVC_UNAVAILABLE, NULL, NULL,
- NULL, NULL, 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);
- krb5_data_free(&k5_error_blob);
- if (!out->data) {
- return NT_STATUS_NO_MEMORY;
- }
-
- return NT_STATUS_OK;
-}
-
-typedef enum kdc_process_ret (*kdc_process_fn_t)(struct kdc_server *kdc,
- TALLOC_CTX *mem_ctx,
- DATA_BLOB *input,
- DATA_BLOB *reply,
- struct tsocket_address *peer_addr,
- struct tsocket_address *my_addr,
- int datagram);
-
-/* hold information about one kdc socket */
-struct kdc_socket {
- struct kdc_server *kdc;
- struct tsocket_address *local_address;
- kdc_process_fn_t process;
-};
-
-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");
-}
+extern struct krb5plugin_kdc_ftable kdc_plugin_table;
/**
Wrapper for krb5_kdc_process_krb5_request, converting to/from Samba
calling conventions
*/
-static enum kdc_process_ret kdc_process(struct kdc_server *kdc,
- TALLOC_CTX *mem_ctx,
- DATA_BLOB *input,
- DATA_BLOB *reply,
- struct tsocket_address *peer_addr,
- struct tsocket_address *my_addr,
- int datagram_reply)
+static kdc_code kdc_process(struct kdc_server *kdc,
+ TALLOC_CTX *mem_ctx,
+ DATA_BLOB *input,
+ DATA_BLOB *reply,
+ struct tsocket_address *peer_addr,
+ struct tsocket_address *my_addr,
+ int datagram_reply)
{
int ret;
char *pa;
struct sockaddr_storage ss;
krb5_data k5_reply;
+ krb5_kdc_configuration *kdc_config = kdc->private_data;
+ struct timespec now_timespec = timespec_current();
+ struct timeval now_timeval = convert_timespec_to_timeval(now_timespec);
+
krb5_data_zero(&k5_reply);
- krb5_kdc_update_time(NULL);
+ krb5_kdc_update_time(&now_timeval);
+
+ /* This sets the time into the DSDB opaque */
+ *kdc->base_ctx->current_nttime_ull = full_timespec_to_nt_time(&now_timespec);
ret = tsocket_address_bsd_sockaddr(peer_addr, (struct sockaddr *) &ss,
sizeof(struct sockaddr_storage));
if (ret < 0) {
- return KDC_PROCESS_FAILED;
+ return KDC_ERROR;
}
pa = tsocket_address_string(peer_addr, mem_ctx);
if (pa == NULL) {
- return KDC_PROCESS_FAILED;
+ return KDC_ERROR;
}
- DEBUG(10,("Received KDC packet of length %lu from %s\n",
- (long)input->length - 4, pa));
+ DBG_DEBUG("Received KDC packet of length %zu from %s\n",
+ input->length, pa);
ret = krb5_kdc_process_krb5_request(kdc->smb_krb5_context->krb5_context,
- kdc->config,
+ kdc_config,
input->data, input->length,
&k5_reply,
pa,
datagram_reply);
if (ret == -1) {
*reply = data_blob(NULL, 0);
- return KDC_PROCESS_FAILED;
+ return KDC_ERROR;
}
if (ret == HDB_ERR_NOT_FOUND_HERE) {
*reply = data_blob(NULL, 0);
- return KDC_PROCESS_PROXY;
+ return KDC_PROXY_REQUEST;
}
if (k5_reply.length) {
} else {
*reply = data_blob(NULL, 0);
}
- return KDC_PROCESS_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;
- enum kdc_process_ret 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_PROCESS_FAILED) {
- kdc_tcp_terminate_connection(kdc_conn,
- "kdc_tcp_call_loop: process function failed");
- return;
- }
-
- if (ret == KDC_PROCESS_PROXY) {
- 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);
+ return KDC_OK;
}
-/*
- 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
-};
-
-/* hold information about one kdc/kpasswd udp socket */
-struct kdc_udp_socket {
- struct kdc_socket *kdc_socket;
- struct tdgram_context *dgram;
- struct tevent_queue *send_queue;
-};
-
-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;
- enum kdc_process_ret 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_PROCESS_FAILED) {
- talloc_free(call);
- goto done;
- }
-
- if (ret == KDC_PROCESS_PROXY) {
- 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
*/
-static NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc, struct loadparm_context *lp_ctx,
- struct interface *ifaces)
+static NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc,
+ struct loadparm_context *lp_ctx,
+ struct interface *ifaces,
+ const struct model_ops *model_ops)
{
- const struct model_ops *model_ops;
int num_interfaces;
TALLOC_CTX *tmp_ctx = talloc_new(kdc);
NTSTATUS status;
uint16_t kpasswd_port = lpcfg_kpasswd_port(lp_ctx);
bool done_wildcard = false;
- /* within the kdc task we want to be a single process, so
- ask for the single process model ops and pass these to the
- stream_setup_socket() call. */
- model_ops = process_model_startup("single");
- if (!model_ops) {
- DEBUG(0,("Can't find 'single' process model_ops\n"));
- return NT_STATUS_INTERNAL_ERROR;
- }
-
num_interfaces = iface_list_count(ifaces);
/* if we are allowing incoming packets from any address, then
we need to bind to the wildcard address */
if (!lpcfg_bind_interfaces_only(lp_ctx)) {
- int num_binds = 0;
+ size_t num_binds = 0;
char **wcard = iface_list_wildcard(kdc);
NT_STATUS_HAVE_NO_MEMORY(wcard);
for (i=0; wcard[i]; i++) {
if (kpasswd_port) {
status = kdc_add_socket(kdc, model_ops,
"kpasswd", wcard[i], kpasswd_port,
- kpasswdd_process, false);
+ kpasswd_process, false);
if (NT_STATUS_IS_OK(status)) {
num_binds++;
}
if (kpasswd_port) {
status = kdc_add_socket(kdc, model_ops,
"kpasswd", address, kpasswd_port,
- kpasswdd_process, done_wildcard);
+ kpasswd_process, done_wildcard);
NT_STATUS_NOT_OK_RETURN(status);
}
}
DATA_BLOB srv_sig;
struct PAC_SIGNATURE_DATA kdc_sig;
struct kdc_server *kdc = talloc_get_type(msg->private_data, struct kdc_server);
+ krb5_kdc_configuration *kdc_config =
+ (krb5_kdc_configuration *)kdc->private_data;
enum ndr_err_code ndr_err;
int ret;
- hdb_entry_ex ent;
+ hdb_entry ent;
krb5_principal principal;
+
/* There is no reply to this request */
r->out.generic_reply = data_blob(NULL, 0);
return NT_STATUS_NO_MEMORY;
}
- ret = kdc->config->db[0]->hdb_fetch_kvno(kdc->smb_krb5_context->krb5_context,
- kdc->config->db[0],
+ ret = kdc_config->db[0]->hdb_fetch_kvno(kdc->smb_krb5_context->krb5_context,
+ kdc_config->db[0],
principal,
HDB_F_GET_KRBTGT | HDB_F_DECRYPT,
0,
&ent);
if (ret != 0) {
- hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
+ hdb_free_entry(kdc->smb_krb5_context->krb5_context, kdc_config->db[0], &ent);
krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
return NT_STATUS_LOGON_FAILURE;
ret = kdc_check_pac(kdc->smb_krb5_context->krb5_context, srv_sig, &kdc_sig, &ent);
- hdb_free_entry(kdc->smb_krb5_context->krb5_context, &ent);
+ hdb_free_entry(kdc->smb_krb5_context->krb5_context, kdc_config->db[0], &ent);
krb5_free_principal(kdc->smb_krb5_context->krb5_context, principal);
if (ret != 0) {
/*
startup the kdc task
*/
-static void kdc_task_init(struct task_server *task)
+static NTSTATUS kdc_task_init(struct task_server *task)
{
struct kdc_server *kdc;
NTSTATUS status;
- krb5_error_code ret;
struct interface *ifaces;
- int ldb_ret;
switch (lpcfg_server_role(task->lp_ctx)) {
case ROLE_STANDALONE:
task_server_terminate(task, "kdc: no KDC required in standalone configuration", false);
- return;
+ return NT_STATUS_INVALID_DOMAIN_ROLE;
case ROLE_DOMAIN_MEMBER:
task_server_terminate(task, "kdc: no KDC required in member server configuration", false);
- return;
+ return NT_STATUS_INVALID_DOMAIN_ROLE;
case ROLE_DOMAIN_PDC:
case ROLE_DOMAIN_BDC:
- task_server_terminate(task, "Cannot start KDC as a 'classic Samba' DC", true);
- return;
+ case ROLE_IPA_DC:
+ task_server_terminate(
+ task, "Cannot start KDC as a 'classic Samba' DC", false);
+ return NT_STATUS_INVALID_DOMAIN_ROLE;
case ROLE_ACTIVE_DIRECTORY_DC:
/* Yes, we want a KDC */
break;
if (iface_list_count(ifaces) == 0) {
task_server_terminate(task, "kdc: no network interfaces configured", false);
- return;
+ return NT_STATUS_UNSUCCESSFUL;
}
task_server_set_title(task, "task[kdc]");
kdc = talloc_zero(task, struct kdc_server);
if (kdc == NULL) {
task_server_terminate(task, "kdc: out of memory", true);
- return;
+ return NT_STATUS_NO_MEMORY;
}
kdc->task = task;
+ task->private_data = kdc;
+
+ /* start listening on the configured network interfaces */
+ status = kdc_startup_interfaces(kdc, task->lp_ctx, ifaces,
+ task->model_ops);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, "kdc failed to setup interfaces", true);
+ return status;
+ }
- /* get a samdb connection */
- kdc->samdb = samdb_connect(kdc, kdc->task->event_ctx, kdc->task->lp_ctx,
- system_session(kdc->task->lp_ctx), 0);
- if (!kdc->samdb) {
- DEBUG(1,("kdc_task_init: unable to connect to samdb\n"));
- task_server_terminate(task, "kdc: krb5_init_context samdb connect failed", true);
+ return NT_STATUS_OK;
+}
+
+/*
+ initialise the kdc task after a fork
+*/
+static void kdc_post_fork(struct task_server *task, struct process_details *pd)
+{
+ struct kdc_server *kdc;
+ krb5_kdc_configuration *kdc_config = NULL;
+ NTSTATUS status;
+ krb5_error_code ret;
+ int ldb_ret;
+
+ if (task == NULL) {
+ task_server_terminate(task, "kdc: Null task", true);
return;
}
-
- ldb_ret = samdb_rodc(kdc->samdb, &kdc->am_rodc);
- if (ldb_ret != LDB_SUCCESS) {
- DEBUG(1, ("kdc_task_init: Cannot determine if we are an RODC: %s\n",
- ldb_errstring(kdc->samdb)));
- task_server_terminate(task, "kdc: krb5_init_context samdb RODC connect failed", true);
+ if (task->private_data == NULL) {
+ task_server_terminate(task, "kdc: No kdc_server info", true);
return;
}
+ kdc = talloc_get_type_abort(task->private_data, struct kdc_server);
kdc->proxy_timeout = lpcfg_parm_int(kdc->task->lp_ctx, NULL, "kdc", "proxy timeout", 5);
ret = smb_krb5_init_context(kdc, task->lp_ctx, &kdc->smb_krb5_context);
if (ret) {
- DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
- error_message(ret)));
+ DBG_WARNING("kdc_task_init: krb5_init_context failed (%s)\n",
+ error_message(ret));
task_server_terminate(task, "kdc: krb5_init_context failed", true);
return;
}
krb5_add_et_list(kdc->smb_krb5_context->krb5_context, initialize_hdb_error_table_r);
ret = krb5_kdc_get_config(kdc->smb_krb5_context->krb5_context,
- &kdc->config);
+ &kdc_config);
if(ret) {
task_server_terminate(task, "kdc: failed to get KDC configuration", true);
return;
}
- kdc->config->logf = (krb5_log_facility *)kdc->smb_krb5_context->pvt_log_data;
- kdc->config->db = talloc(kdc, struct HDB *);
- if (!kdc->config->db) {
+ kdc_config->logf = (krb5_log_facility *)kdc->smb_krb5_context->pvt_log_data;
+ kdc_config->db = talloc(kdc, struct HDB *);
+ if (!kdc_config->db) {
task_server_terminate(task, "kdc: out of memory", true);
return;
}
- kdc->config->num_db = 1;
+ kdc_config->num_db = 1;
/*
- * This restores the behavior before
- * commit 255e3e18e00f717d99f3bc57c8a8895ff624f3c3
- * s4:heimdal: import lorikeet-heimdal-201107150856
- * (commit 48936803fae4a2fb362c79365d31f420c917b85b)
+ * Note with the CVE-2022-37966 patches,
+ * see https://bugzilla.samba.org/show_bug.cgi?id=15219
+ * and https://bugzilla.samba.org/show_bug.cgi?id=15237
+ * we want to use the strongest keys for everything.
*
- * as_use_strongest_session_key,preauth_use_strongest_session_key
- * and tgs_use_strongest_session_key are input to the
- * _kdc_find_etype() function. The old bahavior is in
- * the use_strongest_session_key=FALSE code path.
- * (The only remaining difference in _kdc_find_etype()
- * is the is_preauth parameter.)
+ * Some of these don't have any real effect anymore,
+ * but it is better to have them as true...
+ */
+ kdc_config->tgt_use_strongest_session_key = true;
+ kdc_config->preauth_use_strongest_session_key = true;
+ kdc_config->svc_use_strongest_session_key = true;
+ kdc_config->use_strongest_server_key = true;
+
+ kdc_config->force_include_pa_etype_salt = true;
+
+ /*
+ * For Samba CVE-2020-25719 Require PAC to be present
+ * This instructs Heimdal to match AD behaviour,
+ * as seen after Microsoft's CVE-2021-42287 when
+ * PacRequestorEnforcement is set to 2.
*
- * The old behavior in the _kdc_get_preferred_key()
- * function is use_strongest_server_key=TRUE.
+ * Samba BUG: https://bugzilla.samba.org/show_bug.cgi?id=14686
+ * REF: https://support.microsoft.com/en-au/topic/kb5008380-authentication-updates-cve-2021-42287-9dafac11-e0d0-4cb8-959a-143bd0201041
*/
- kdc->config->as_use_strongest_session_key = false;
- kdc->config->preauth_use_strongest_session_key = false;
- kdc->config->tgs_use_strongest_session_key = false;
- kdc->config->use_strongest_server_key = true;
+
+ kdc_config->require_pac = true;
+
+ /*
+ * By default we enable RFC6113/FAST support,
+ * but we have an option to disable in order to
+ * test against a KDC with FAST support.
+ */
+ kdc_config->enable_fast = lpcfg_kdc_enable_fast(task->lp_ctx);
+
+ {
+ static const char *dummy_string = "Microsoft";
+
+ /*
+ * The FAST cookie is not cryptographically required,
+ * provided that the non-AD gss-preauth authentication
+ * method is removed (as this is the only multi-step
+ * authentication method).
+ *
+ * gss-preauth has been disabled both by not being
+ * configured and by being made dependent
+ * configuration for a "real" fast cookie.
+ *
+ * The hide_client_names feature in Heimdal is the
+ * only other state that is persisted in the cookie,
+ * and this does not need to be in the cookie for
+ * single-shot authentication protocols such as ENC-TS
+ * and ENC-CHAL, the standard password protocols in
+ * AD.
+ *
+ * Furthermore, the Heimdal KDC does not fail if the
+ * client does not supply a FAST cookie, showing that
+ * the presence of the cookie is not required.
+ */
+ kdc_config->enable_fast_cookie = false;
+ kdc_config->dummy_fast_cookie = smb_krb5_make_data(discard_const_p(char, dummy_string),
+ strlen(dummy_string));
+ }
+
+ /*
+ * Match Windows and RFC6113 and Windows but break older
+ * Heimdal clients.
+ */
+ kdc_config->enable_armored_pa_enc_timestamp = false;
/* Register hdb-samba4 hooks for use as a keytab */
kdc->base_ctx->ev_ctx = task->event_ctx;
kdc->base_ctx->lp_ctx = task->lp_ctx;
+ kdc->base_ctx->msg_ctx = task->msg_ctx;
+
+ kdc->base_ctx->current_nttime_ull = talloc_zero(kdc, unsigned long long);
+ if (kdc->base_ctx->current_nttime_ull == NULL) {
+ task_server_terminate(task, "kdc: out of memory creating time variable", true);
+ return;
+ }
status = hdb_samba4_create_kdc(kdc->base_ctx,
kdc->smb_krb5_context->krb5_context,
- &kdc->config->db[0]);
+ &kdc_config->db[0],
+ &kdc->kdc_db_ctx);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, "kdc: hdb_samba4_create_kdc (setup KDC database) failed", true);
return;
}
+ ldb_ret = samdb_rodc(kdc->kdc_db_ctx->samdb, &kdc->am_rodc);
+ if (ldb_ret != LDB_SUCCESS) {
+ DBG_WARNING("kdc_task_init: "
+ "Cannot determine if we are an RODC: %s\n",
+ ldb_errstring(kdc->kdc_db_ctx->samdb));
+ task_server_terminate(task, "kdc: krb5_init_context samdb RODC query failed", true);
+ return;
+ }
+
ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
- PLUGIN_TYPE_DATA, "hdb",
+ PLUGIN_TYPE_DATA, "hdb_samba4_interface",
&hdb_samba4_interface);
if(ret) {
task_server_terminate(task, "kdc: failed to register hdb plugin", true);
return;
}
- ret = krb5_kt_register(kdc->smb_krb5_context->krb5_context, &hdb_kt_ops);
+ kdc->kpasswd_keytab_name = talloc_asprintf(kdc, "HDBGET:samba4:&%p", kdc->base_ctx);
+ if (kdc->kpasswd_keytab_name == NULL) {
+ task_server_terminate(task,
+ "kdc: Failed to set keytab name",
+ true);
+ return;
+ }
+
+ ret = krb5_kt_register(kdc->smb_krb5_context->krb5_context, &hdb_get_kt_ops);
if(ret) {
task_server_terminate(task, "kdc: failed to register keytab plugin", true);
return;
}
- /* Register WinDC hooks */
+ /* Register KDC hooks */
ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
- PLUGIN_TYPE_DATA, "windc",
- &windc_plugin_table);
+ PLUGIN_TYPE_DATA, "kdc",
+ &kdc_plugin_table);
if(ret) {
- task_server_terminate(task, "kdc: failed to register windc plugin", true);
+ task_server_terminate(task, "kdc: failed to register kdc plugin", true);
return;
}
- ret = krb5_kdc_windc_init(kdc->smb_krb5_context->krb5_context);
+ ret = krb5_kdc_plugin_init(kdc->smb_krb5_context->krb5_context);
if(ret) {
- task_server_terminate(task, "kdc: failed to init windc plugin", true);
+ task_server_terminate(task, "kdc: failed to init kdc plugin", true);
return;
}
- ret = krb5_kdc_pkinit_config(kdc->smb_krb5_context->krb5_context, kdc->config);
+ ret = krb5_kdc_pkinit_config(kdc->smb_krb5_context->krb5_context, kdc_config);
if(ret) {
task_server_terminate(task, "kdc: failed to init kdc pkinit subsystem", true);
return;
}
-
- /* start listening on the configured network interfaces */
- status = kdc_startup_interfaces(kdc, task->lp_ctx, ifaces);
- if (!NT_STATUS_IS_OK(status)) {
- task_server_terminate(task, "kdc failed to setup interfaces", true);
- return;
- }
+ kdc->private_data = kdc_config;
status = IRPC_REGISTER(task->msg_ctx, irpc, KDC_CHECK_GENERIC_KERBEROS,
kdc_check_generic_kerberos, kdc);
/* called at smbd startup - register ourselves as a server service */
-NTSTATUS server_service_kdc_init(void)
+NTSTATUS server_service_kdc_init(TALLOC_CTX *ctx)
{
- return register_server_service("kdc", kdc_task_init);
+ static const struct service_details details = {
+ .inhibit_fork_on_accept = true,
+ .inhibit_pre_fork = false,
+ .task_init = kdc_task_init,
+ .post_fork = kdc_post_fork
+ };
+ return register_server_service(ctx, "kdc", &details);
}
git.samba.org / samba.git / blobdiff