--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+
+ NTP packet signing server
+
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
+ Copyright (C) Andrew Tridgell 2005
+ Copyright (C) Stefan Metzmacher 2005
+
+ 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 "smbd/service_task.h"
+#include "smbd/service.h"
+#include "smbd/service_stream.h"
+#include "smbd/process_model.h"
+#include "lib/stream/packet.h"
+#include "librpc/gen_ndr/ntp_signd.h"
+#include "param/param.h"
+#include "dsdb/samdb/samdb.h"
+#include "auth/auth.h"
+
+/*
+ top level context structure for the ntp_signd server
+*/
+struct ntp_signd_server {
+ struct task_server *task;
+ struct ldb_context *samdb;
+};
+
+/*
+ state of an open connection
+*/
+struct ntp_signd_connection {
+ /* stream connection we belong to */
+ struct stream_connection *conn;
+
+ /* the ntp_signd_server the connection belongs to */
+ struct ntp_signd_server *ntp_signd;
+
+ struct packet_context *packet;
+};
+
+static void ntp_signd_terminate_connection(struct ntp_signd_connection *ntp_signdconn, const char *reason)
+{
+ stream_terminate_connection(ntp_signdconn->conn, reason);
+}
+
+/*
+ receive a full packet on a NTP_SIGND connection
+*/
+static NTSTATUS ntp_signd_recv(void *private, DATA_BLOB blob)
+{
+ struct ntp_signd_connection *ntp_signdconn = talloc_get_type(private,
+ struct ntp_signd_connection);
+ NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
+ TALLOC_CTX *tmp_ctx = talloc_new(ntp_signdconn);
+ DATA_BLOB input, reply;
+ const struct dom_sid *domain_sid;
+ struct dom_sid *sid;
+ struct sign_request sign_request;
+ enum ndr_err_code ndr_err;
+ struct ldb_result *res;
+ const char *attrs[] = { "unicodePwd", NULL };
+
+ talloc_steal(tmp_ctx, blob.data);
+
+ input = data_blob_const(blob.data + 4, blob.length - 4);
+
+ ndr_err = ndr_pull_struct_blob_all(input, tmp_ctx,
+ iconv_convenience,
+ &sign_request,
+ (ndr_pull_flags_fn_t)ndr_pull_sign_request);
+
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(1,("failed to parse ntp signing request\n"));
+ dump_data(1, input.data, input.length);
+ return ndr_map_error2ntstatus(ndr_err);
+ }
+
+ domain_sid = samdb_domain_sid(ntp_signdconn->ntp_signd->samdb);
+ if (!domain_sid) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ sid = dom_sid_add_rid(tmp_ctx, domain_sid, sign_request.key_id & 0x7FFFFFFF);
+ if (!sid) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* Sign packet */
+ ret = ldb_search_exp_format(ntp_signdconn->ntp_signd->samdb, tmp_ctx,
+ &res, samdb_base_dn(ntp_signdconn->ntp_signd->samdb),
+ LDB_SCOPE_SUBTREE, attrs, "(&(objectSid=%s)(objectClass=computer))");
+ if (ret != LDB_SUCCESS) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ if (res->count != 1) {
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+ /* Sign the NTP response with the unicodePwd */
+
+ /* Place it into the packet for the wire */
+
+ blob = data_blob_talloc(ntp_signdconn, NULL, reply.length + 4);
+ if (!blob.data) {
+ talloc_free(tmp_ctx);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ RSIVAL(blob.data, 0, reply.length);
+ memcpy(blob.data + 4, reply.data, reply.length);
+
+ status = packet_send(ntp_signdconn->packet, blob);
+
+ /* the call isn't needed any more */
+ talloc_free(tmp_ctx);
+ return status;
+}
+
+/*
+ receive some data on a NTP_SIGND connection
+*/
+static void ntp_signd_recv_handler(struct stream_connection *conn, uint16_t flags)
+{
+ struct ntp_signd_connection *ntp_signdconn = talloc_get_type(conn->private,
+ struct ntp_signd_connection);
+ packet_recv(ntp_signdconn->packet);
+}
+
+/*
+ called on a tcp recv error
+*/
+static void ntp_signd_recv_error(void *private, NTSTATUS status)
+{
+ struct ntp_signd_connection *ntp_signdconn = talloc_get_type(private, struct ntp_signd_connection);
+ ntp_signd_terminate_connection(ntp_signdconn, nt_errstr(status));
+}
+
+/*
+ called when we can write to a connection
+*/
+static void ntp_signd_send(struct stream_connection *conn, uint16_t flags)
+{
+ struct ntp_signd_connection *ntp_signdconn = talloc_get_type(conn->private,
+ struct ntp_signd_connection);
+ packet_queue_run(ntp_signdconn->packet);
+}
+
+/*
+ called when we get a new connection
+*/
+static void ntp_signd_accept(struct stream_connection *conn)
+{
+ struct ntp_signd_server *ntp_signd = talloc_get_type(conn->private, struct ntp_signd_server);
+ struct ntp_signd_connection *ntp_signdconn;
+
+ ntp_signdconn = talloc_zero(conn, struct ntp_signd_connection);
+ if (!ntp_signdconn) {
+ stream_terminate_connection(conn, "ntp_signd_accept: out of memory");
+ return;
+ }
+ ntp_signdconn->conn = conn;
+ ntp_signdconn->ntp_signd = ntp_signd;
+ conn->private = ntp_signdconn;
+
+ ntp_signdconn->packet = packet_init(ntp_signdconn);
+ if (ntp_signdconn->packet == NULL) {
+ ntp_signd_terminate_connection(ntp_signdconn, "ntp_signd_accept: out of memory");
+ return;
+ }
+ packet_set_private(ntp_signdconn->packet, ntp_signdconn);
+ packet_set_socket(ntp_signdconn->packet, conn->socket);
+ packet_set_callback(ntp_signdconn->packet, ntp_signd_recv);
+ packet_set_full_request(ntp_signdconn->packet, packet_full_request_u32);
+ packet_set_error_handler(ntp_signdconn->packet, ntp_signd_recv_error);
+ packet_set_event_context(ntp_signdconn->packet, conn->event.ctx);
+ packet_set_fde(ntp_signdconn->packet, conn->event.fde);
+ packet_set_serialise(ntp_signdconn->packet);
+}
+
+static const struct stream_server_ops ntp_signd_stream_ops = {
+ .name = "ntp_signd",
+ .accept_connection = ntp_signd_accept,
+ .recv_handler = ntp_signd_recv_handler,
+ .send_handler = ntp_signd_send
+};
+
+/*
+ startup the ntp_signd task
+*/
+static void ntp_signd_task_init(struct task_server *task)
+{
+ struct ntp_signd_server *ntp_signd;
+ NTSTATUS status;
+
+ const struct model_ops *model_ops;
+
+ const char *address = "/tmp/ux_demo";
+
+ /* within the ntp_signd 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_byname("single");
+ if (!model_ops) {
+ DEBUG(0,("Can't find 'single' process model_ops\n"));
+ return;
+ }
+
+ status = stream_setup_socket(ntp_signd->task->event_ctx,
+ ntp_signd->task->lp_ctx,
+ model_ops,
+ &ntp_signd_stream_ops,
+ "unix", address, NULL,
+ lp_socket_options(ntp_signd->task->lp_ctx),
+ ntp_signd);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("Failed to bind to %s - %s\n",
+ address, nt_errstr(status)));
+ return;
+ }
+
+ task_server_set_title(task, "task[ntp_signd]");
+
+ ntp_signd = talloc(task, struct ntp_signd_server);
+ if (ntp_signd == NULL) {
+ task_server_terminate(task, "ntp_signd: out of memory");
+ return;
+ }
+
+ ntp_signd->task = task;
+
+ ntp_signd->samdb = samdb_connect(ntp_signd, task->event_ctx, task->lp_ctx, anonymous_session(ntp_signd, task->event_ctx, task->lp_ctx));
+ if (ntp_signd->samdb == NULL) {
+ task_server_terminate(task, "ntp_signd failed to open samdb");
+ return;
+ }
+
+}
+
+
+/* called at smbd startup - register ourselves as a server service */
+NTSTATUS server_service_ntp_signd_init(void)
+{
+ return register_server_service("ntp_signd", ntp_signd_task_init);
+}
git.samba.org / samba.git / commitdiff