s4:torture Add test for the NTP signd server

This is used by at patch to the NTP project to supply authenticated
time as required by MS-SNTP. (ie, to keep windows clients in time sync
in the domain)

Andrew Bartlett

1 files changed, 270 insertions, 0 deletions

diff --git a/source4/torture/ntp/ntp_signd.c b/source4/torture/ntp/ntp_signd.c
new file mode 100644
index 0000000000..e82276a086
--- /dev/null
+++ b/source4/torture/ntp/ntp_signd.c
@@ -0,0 +1,270 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Test NTP authentication support
+
+   Copyright (C) Andrew Bartlet <abartlet@samba.org> 2008
+   
+   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 "torture/torture.h"
+#include "torture/smbtorture.h"
+#include <tevent.h>
+#include "lib/socket/socket.h"
+#include "lib/stream/packet.h"
+#include "auth/credentials/credentials.h"
+#include "torture/rpc/rpc.h"
+#include "torture/rpc/netlogon.h"
+#include "../lib/crypto/crypto.h"
+#include "libcli/auth/libcli_auth.h"
+#include "librpc/gen_ndr/ndr_netlogon_c.h"
+#include "librpc/gen_ndr/ndr_netlogon.h"
+#include "librpc/gen_ndr/ndr_ntp_signd.h"
+#include "param/param.h"
+
+#define TEST_MACHINE_NAME "ntpsigndtest"
+
+struct signd_client_socket {
+	struct socket_context *sock;
+	
+	/* the fd event */
+	struct tevent_fd *fde;
+	
+	NTSTATUS status;
+	DATA_BLOB request, reply;
+	
+	struct packet_context *packet;
+		
+	size_t partial_read;
+};
+
+static NTSTATUS signd_client_full_packet(void *private_data, DATA_BLOB data)
+{
+	struct signd_client_socket *signd_client = talloc_get_type(private_data, struct signd_client_socket);
+	talloc_steal(signd_client, data.data);
+	signd_client->reply = data;
+	signd_client->reply.length -= 4;
+	signd_client->reply.data += 4;
+	return NT_STATUS_OK;
+}
+
+static void signd_client_error_handler(void *private_data, NTSTATUS status)
+{
+	struct signd_client_socket *signd_client = talloc_get_type(private_data, struct signd_client_socket);
+	signd_client->status = status;
+}
+
+/*
+  handle fd events on a signd_client_socket
+*/
+static void signd_client_socket_handler(struct tevent_context *ev, struct tevent_fd *fde,
+				 uint16_t flags, void *private_data)
+{
+	struct signd_client_socket *signd_client = talloc_get_type(private_data, struct signd_client_socket);
+	if (flags & TEVENT_FD_READ) {
+		packet_recv(signd_client->packet);
+		return;
+	}
+	if (flags & TEVENT_FD_WRITE) {
+		packet_queue_run(signd_client->packet);
+		return;
+	}
+	/* not reached */
+	return;
+}
+
+/* A torture test to show that the unix domain socket protocol is
+ * operating correctly, and the signatures are as expected */
+
+static bool test_ntp_signd(struct torture_context *tctx, 
+			   struct dcerpc_pipe *p,
+			   struct cli_credentials *credentials)
+{
+	struct netlogon_creds_CredentialState *creds;
+	TALLOC_CTX *mem_ctx = talloc_new(tctx);
+
+	NTSTATUS status;
+	struct netr_ServerReqChallenge r;
+	struct netr_ServerAuthenticate3 a;
+	struct netr_Credential credentials1, credentials2, credentials3;
+	uint32_t rid;
+	const char *machine_name;
+	const struct samr_Password *pwhash = cli_credentials_get_nt_hash(credentials, mem_ctx);
+	uint32_t negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+
+	struct sign_request sign_req;
+	struct signed_reply signed_reply;
+	DATA_BLOB sign_req_blob;
+
+	struct signd_client_socket *signd_client;
+	char *signd_socket_address;
+
+	struct MD5Context ctx;
+	uint8_t sig[16];
+	enum ndr_err_code ndr_err;
+
+	machine_name = cli_credentials_get_workstation(credentials);
+
+	torture_comment(tctx, "Testing ServerReqChallenge\n");
+
+	r.in.server_name = NULL;
+	r.in.computer_name = machine_name;
+	r.in.credentials = &credentials1;
+	r.out.return_credentials = &credentials2;
+
+	generate_random_buffer(credentials1.data, sizeof(credentials1.data));
+
+	status = dcerpc_netr_ServerReqChallenge(p, tctx, &r);
+	torture_assert_ntstatus_ok(tctx, status, "ServerReqChallenge");
+
+	a.in.server_name = NULL;
+	a.in.account_name = talloc_asprintf(tctx, "%s$", machine_name);
+	a.in.secure_channel_type = SEC_CHAN_WKSTA;
+	a.in.computer_name = machine_name;
+	a.in.negotiate_flags = &negotiate_flags;
+	a.in.credentials = &credentials3;
+	a.out.return_credentials = &credentials3;
+	a.out.negotiate_flags = &negotiate_flags;
+	a.out.rid = &rid;
+
+	creds = netlogon_creds_client_init(tctx, a.in.account_name,
+					   a.in.computer_name,
+					   &credentials1, &credentials2, 
+					   pwhash, &credentials3,
+					   negotiate_flags);
+	
+	torture_assert(tctx, creds != NULL, "memory allocation");
+
+	torture_comment(tctx, "Testing ServerAuthenticate3\n");
+
+	status = dcerpc_netr_ServerAuthenticate3(p, tctx, &a);
+	torture_assert_ntstatus_ok(tctx, status, "ServerAuthenticate3");
+	torture_assert(tctx, netlogon_creds_client_check(creds, &credentials3), "Credential chaining failed");
+
+	sign_req.version = 1;
+	sign_req.op = SIGN_TO_CLIENT;
+	sign_req.packet_id = 1;
+	sign_req.key_id = rid;
+	sign_req.packet_to_sign = data_blob_string_const("I am a tea pot");
+	
+	ndr_err = ndr_push_struct_blob(&sign_req_blob, mem_ctx, NULL, &sign_req, (ndr_push_flags_fn_t)ndr_push_sign_request);
+	torture_assert(tctx, NDR_ERR_CODE_IS_SUCCESS(ndr_err), "Failed to push sign_req");
+	
+	signd_client = talloc(mem_ctx, struct signd_client_socket);
+
+	status = socket_create("unix", SOCKET_TYPE_STREAM, &signd_client->sock, 0);
+	
+	signd_socket_address = talloc_asprintf(signd_client, "%s/socket", 
+					       lp_ntp_signd_socket_directory(tctx->lp_ctx));
+
+	status = socket_connect_ev(signd_client->sock, NULL, 
+				   socket_address_from_strings(signd_client, 
+							       "unix", signd_socket_address, 0), 0, tctx->ev);
+	torture_assert_ntstatus_ok(tctx, status, "Failed to connect to signd!");
+	
+	/* Setup the FDE, start listening for read events
+	 * from the start (otherwise we may miss a socket
+	 * drop) and mark as AUTOCLOSE along with the fde */
+	
+	/* Ths is equivilant to EVENT_FD_READABLE(signd_client->fde) */
+	signd_client->fde = tevent_add_fd(tctx->ev, signd_client->sock,
+			    socket_get_fd(signd_client->sock),
+			    TEVENT_FD_READ,
+			    signd_client_socket_handler, signd_client);
+	/* its now the job of the event layer to close the socket */
+	tevent_fd_set_close_fn(signd_client->fde, socket_tevent_fd_close_fn);
+	socket_set_flags(signd_client->sock, SOCKET_FLAG_NOCLOSE);
+	
+	signd_client->status = NT_STATUS_OK;
+	signd_client->reply = data_blob(NULL, 0);
+
+	signd_client->packet = packet_init(signd_client);
+	if (signd_client->packet == NULL) {
+		talloc_free(signd_client);
+		return ENOMEM;
+	}
+	packet_set_private(signd_client->packet, signd_client);
+	packet_set_socket(signd_client->packet, signd_client->sock);
+	packet_set_callback(signd_client->packet, signd_client_full_packet);
+	packet_set_full_request(signd_client->packet, packet_full_request_u32);
+	packet_set_error_handler(signd_client->packet, signd_client_error_handler);
+	packet_set_event_context(signd_client->packet, tctx->ev);
+	packet_set_fde(signd_client->packet, signd_client->fde);
+	
+	signd_client->request = data_blob_talloc(signd_client, NULL, sign_req_blob.length + 4);
+	RSIVAL(signd_client->request.data, 0, sign_req_blob.length);
+	memcpy(signd_client->request.data+4, sign_req_blob.data, sign_req_blob.length);
+	packet_send(signd_client->packet, signd_client->request);
+
+	while ((NT_STATUS_IS_OK(signd_client->status)) && !signd_client->reply.length) {
+		if (tevent_loop_once(tctx->ev) != 0) {
+			talloc_free(signd_client);
+			return EINVAL;
+		}
+	}
+
+	torture_assert_ntstatus_ok(tctx, signd_client->status, "Error reading signd_client reply packet");
+
+	ndr_err = ndr_pull_struct_blob_all(&signd_client->reply, mem_ctx, 
+					   lp_iconv_convenience(tctx->lp_ctx),
+					   &signed_reply,
+					   (ndr_pull_flags_fn_t)ndr_pull_signed_reply);
+	torture_assert(tctx, NDR_ERR_CODE_IS_SUCCESS(ndr_err), ndr_map_error2string(ndr_err));
+
+	torture_assert_u64_equal(tctx, signed_reply.version, 
+				 sign_req.version, "Invalid Version");
+	torture_assert_u64_equal(tctx, signed_reply.packet_id, 
+				 sign_req.packet_id, "Invalid Packet ID");
+	torture_assert_u64_equal(tctx, signed_reply.op, 
+				 SIGNING_SUCCESS, "Should have replied with signing success");
+	torture_assert_u64_equal(tctx, signed_reply.signed_packet.length, 
+				 sign_req.packet_to_sign.length + 20, "Invalid reply length from signd");
+	torture_assert_u64_equal(tctx, rid, 
+				 IVAL(signed_reply.signed_packet.data, sign_req.packet_to_sign.length), 
+				 "Incorrect RID in reply");
+
+	/* Check computed signature */
+
+	MD5Init(&ctx);
+	MD5Update(&ctx, pwhash->hash, sizeof(pwhash->hash));
+	MD5Update(&ctx, sign_req.packet_to_sign.data, sign_req.packet_to_sign.length);
+	MD5Final(sig, &ctx);
+
+	torture_assert_mem_equal(tctx, &signed_reply.signed_packet.data[sign_req.packet_to_sign.length + 4],
+				 sig, 16, "Signature on reply was incorrect!");
+	
+	talloc_free(mem_ctx);
+		
+	return true;
+}
+
+NTSTATUS torture_ntp_init(void)
+{
+	struct torture_suite *suite = torture_suite_create(talloc_autofree_context(), "NTP");
+	struct torture_rpc_tcase *tcase;
+
+	tcase = torture_suite_add_machine_workstation_rpc_iface_tcase(suite, "SIGND",
+								      &ndr_table_netlogon, TEST_MACHINE_NAME);
+
+	torture_rpc_tcase_add_test_creds(tcase, "ntp_signd", test_ntp_signd);
+
+	suite->description = talloc_strdup(suite, "NTP tests");
+
+	torture_register_suite(suite);
+
+	return NT_STATUS_OK;
+}
+