1 /*
2 * QEMU I/O channel TLS test
3 *
4 * Copyright (C) 2015 Red Hat, Inc.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library. If not, see
18 * <http://www.gnu.org/licenses/>.
19 *
20 * Author: Daniel P. Berrange <berrange@redhat.com>
21 */
22
23
24 #include "qemu/osdep.h"
25
26 #include "crypto-tls-x509-helpers.h"
27 #include "io/channel-tls.h"
28 #include "io/channel-socket.h"
29 #include "io-channel-helpers.h"
30 #include "crypto/init.h"
31 #include "crypto/tlscredsx509.h"
32 #include "qapi/error.h"
33 #include "qemu/module.h"
34 #include "authz/list.h"
35 #include "qom/object_interfaces.h"
36
37 #define WORKDIR "tests/test-io-channel-tls-work/"
38 #define KEYFILE WORKDIR "key-ctx.pem"
39
40 struct QIOChannelTLSTestData {
41 const char *servercacrt;
42 const char *clientcacrt;
43 const char *servercrt;
44 const char *clientcrt;
45 bool expectServerFail;
46 bool expectClientFail;
47 const char *hostname;
48 const char *const *wildcards;
49 };
50
51 struct QIOChannelTLSHandshakeData {
52 bool finished;
53 bool failed;
54 };
55
test_tls_handshake_done(QIOTask * task,gpointer opaque)56 static void test_tls_handshake_done(QIOTask *task,
57 gpointer opaque)
58 {
59 struct QIOChannelTLSHandshakeData *data = opaque;
60
61 data->finished = true;
62 data->failed = qio_task_propagate_error(task, NULL);
63 }
64
65
test_tls_creds_create(QCryptoTLSCredsEndpoint endpoint,const char * certdir)66 static QCryptoTLSCreds *test_tls_creds_create(QCryptoTLSCredsEndpoint endpoint,
67 const char *certdir)
68 {
69 Object *parent = object_get_objects_root();
70 Object *creds = object_new_with_props(
71 TYPE_QCRYPTO_TLS_CREDS_X509,
72 parent,
73 (endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
74 "testtlscredsserver" : "testtlscredsclient"),
75 &error_abort,
76 "endpoint", (endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
77 "server" : "client"),
78 "dir", certdir,
79 "verify-peer", "yes",
80 "priority", "NORMAL",
81 /* We skip initial sanity checks here because we
82 * want to make sure that problems are being
83 * detected at the TLS session validation stage,
84 * and the test-crypto-tlscreds test already
85 * validate the sanity check code.
86 */
87 "sanity-check", "no",
88 NULL
89 );
90
91 return QCRYPTO_TLS_CREDS(creds);
92 }
93
94
95 /*
96 * This tests validation checking of peer certificates
97 *
98 * This is replicating the checks that are done for an
99 * active TLS session after handshake completes. To
100 * simulate that we create our TLS contexts, skipping
101 * sanity checks. When then get a socketpair, and
102 * initiate a TLS session across them. Finally do
103 * do actual cert validation tests
104 */
test_io_channel_tls(const void * opaque)105 static void test_io_channel_tls(const void *opaque)
106 {
107 struct QIOChannelTLSTestData *data =
108 (struct QIOChannelTLSTestData *)opaque;
109 QCryptoTLSCreds *clientCreds;
110 QCryptoTLSCreds *serverCreds;
111 QIOChannelTLS *clientChanTLS;
112 QIOChannelTLS *serverChanTLS;
113 QIOChannelSocket *clientChanSock;
114 QIOChannelSocket *serverChanSock;
115 QAuthZList *auth;
116 const char * const *wildcards;
117 int channel[2];
118 struct QIOChannelTLSHandshakeData clientHandshake = { false, false };
119 struct QIOChannelTLSHandshakeData serverHandshake = { false, false };
120 QIOChannelTest *test;
121 GMainContext *mainloop;
122
123 /* We'll use this for our fake client-server connection */
124 g_assert(qemu_socketpair(AF_UNIX, SOCK_STREAM, 0, channel) == 0);
125
126 #define CLIENT_CERT_DIR "tests/test-io-channel-tls-client/"
127 #define SERVER_CERT_DIR "tests/test-io-channel-tls-server/"
128 g_mkdir_with_parents(CLIENT_CERT_DIR, 0700);
129 g_mkdir_with_parents(SERVER_CERT_DIR, 0700);
130
131 unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
132 unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT);
133 unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY);
134
135 unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
136 unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
137 unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
138
139 g_assert(link(data->servercacrt,
140 SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
141 g_assert(link(data->servercrt,
142 SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT) == 0);
143 g_assert(link(KEYFILE,
144 SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY) == 0);
145
146 g_assert(link(data->clientcacrt,
147 CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
148 g_assert(link(data->clientcrt,
149 CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT) == 0);
150 g_assert(link(KEYFILE,
151 CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY) == 0);
152
153 clientCreds = test_tls_creds_create(
154 QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT,
155 CLIENT_CERT_DIR);
156 g_assert(clientCreds != NULL);
157
158 serverCreds = test_tls_creds_create(
159 QCRYPTO_TLS_CREDS_ENDPOINT_SERVER,
160 SERVER_CERT_DIR);
161 g_assert(serverCreds != NULL);
162
163 auth = qauthz_list_new("channeltlsacl",
164 QAUTHZ_LIST_POLICY_DENY,
165 &error_abort);
166 wildcards = data->wildcards;
167 while (wildcards && *wildcards) {
168 qauthz_list_append_rule(auth, *wildcards,
169 QAUTHZ_LIST_POLICY_ALLOW,
170 QAUTHZ_LIST_FORMAT_GLOB,
171 &error_abort);
172 wildcards++;
173 }
174
175 clientChanSock = qio_channel_socket_new_fd(
176 channel[0], &error_abort);
177 g_assert(clientChanSock != NULL);
178 serverChanSock = qio_channel_socket_new_fd(
179 channel[1], &error_abort);
180 g_assert(serverChanSock != NULL);
181
182 /*
183 * We have an evil loop to do the handshake in a single
184 * thread, so we need these non-blocking to avoid deadlock
185 * of ourselves
186 */
187 qio_channel_set_blocking(QIO_CHANNEL(clientChanSock), false, NULL);
188 qio_channel_set_blocking(QIO_CHANNEL(serverChanSock), false, NULL);
189
190 /* Now the real part of the test, setup the sessions */
191 clientChanTLS = qio_channel_tls_new_client(
192 QIO_CHANNEL(clientChanSock), clientCreds,
193 data->hostname, &error_abort);
194 g_assert(clientChanTLS != NULL);
195
196 serverChanTLS = qio_channel_tls_new_server(
197 QIO_CHANNEL(serverChanSock), serverCreds,
198 "channeltlsacl", &error_abort);
199 g_assert(serverChanTLS != NULL);
200
201 qio_channel_tls_handshake(clientChanTLS,
202 test_tls_handshake_done,
203 &clientHandshake,
204 NULL,
205 NULL);
206 qio_channel_tls_handshake(serverChanTLS,
207 test_tls_handshake_done,
208 &serverHandshake,
209 NULL,
210 NULL);
211
212 /*
213 * Finally we loop around & around doing handshake on each
214 * session until we get an error, or the handshake completes.
215 * This relies on the socketpair being nonblocking to avoid
216 * deadlocking ourselves upon handshake
217 */
218 mainloop = g_main_context_default();
219 do {
220 g_main_context_iteration(mainloop, TRUE);
221 } while (!clientHandshake.finished ||
222 !serverHandshake.finished);
223
224 g_assert(clientHandshake.failed == data->expectClientFail);
225 g_assert(serverHandshake.failed == data->expectServerFail);
226
227 test = qio_channel_test_new();
228 qio_channel_test_run_threads(test, false,
229 QIO_CHANNEL(clientChanTLS),
230 QIO_CHANNEL(serverChanTLS));
231 qio_channel_test_validate(test);
232
233 test = qio_channel_test_new();
234 qio_channel_test_run_threads(test, true,
235 QIO_CHANNEL(clientChanTLS),
236 QIO_CHANNEL(serverChanTLS));
237 qio_channel_test_validate(test);
238
239 unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
240 unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT);
241 unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY);
242
243 unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
244 unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
245 unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
246
247 rmdir(CLIENT_CERT_DIR);
248 rmdir(SERVER_CERT_DIR);
249
250 object_unparent(OBJECT(serverCreds));
251 object_unparent(OBJECT(clientCreds));
252
253 object_unref(OBJECT(serverChanTLS));
254 object_unref(OBJECT(clientChanTLS));
255
256 object_unref(OBJECT(serverChanSock));
257 object_unref(OBJECT(clientChanSock));
258
259 object_unparent(OBJECT(auth));
260
261 close(channel[0]);
262 close(channel[1]);
263 }
264
265
main(int argc,char ** argv)266 int main(int argc, char **argv)
267 {
268 int ret;
269
270 g_assert(qcrypto_init(NULL) == 0);
271
272 module_call_init(MODULE_INIT_QOM);
273 g_test_init(&argc, &argv, NULL);
274 g_setenv("GNUTLS_FORCE_FIPS_MODE", "2", 1);
275
276 g_mkdir_with_parents(WORKDIR, 0700);
277
278 test_tls_init(KEYFILE);
279
280 # define TEST_CHANNEL(name, caCrt, \
281 serverCrt, clientCrt, \
282 expectServerFail, expectClientFail, \
283 hostname, wildcards) \
284 struct QIOChannelTLSTestData name = { \
285 caCrt, caCrt, serverCrt, clientCrt, \
286 expectServerFail, expectClientFail, \
287 hostname, wildcards \
288 }; \
289 g_test_add_data_func("/qio/channel/tls/" # name, \
290 &name, test_io_channel_tls);
291
292 /* A perfect CA, perfect client & perfect server */
293
294 /* Basic:CA:critical */
295 TLS_ROOT_REQ(cacertreq,
296 "UK", "qemu CA", NULL, NULL, NULL, NULL,
297 true, true, true,
298 true, true, GNUTLS_KEY_KEY_CERT_SIGN,
299 false, false, NULL, NULL,
300 0, 0);
301 TLS_CERT_REQ(servercertreq, cacertreq,
302 "UK", "qemu.org", NULL, NULL, NULL, NULL,
303 true, true, false,
304 true, true,
305 GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
306 true, true, GNUTLS_KP_TLS_WWW_SERVER, NULL,
307 0, 0);
308 TLS_CERT_REQ(clientcertreq, cacertreq,
309 "UK", "qemu", NULL, NULL, NULL, NULL,
310 true, true, false,
311 true, true,
312 GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
313 true, true, GNUTLS_KP_TLS_WWW_CLIENT, NULL,
314 0, 0);
315
316 const char *const wildcards[] = {
317 "C=UK,CN=qemu*",
318 NULL,
319 };
320 TEST_CHANNEL(basic, cacertreq.filename, servercertreq.filename,
321 clientcertreq.filename, false, false,
322 "qemu.org", wildcards);
323
324 ret = g_test_run();
325
326 test_tls_discard_cert(&clientcertreq);
327 test_tls_discard_cert(&servercertreq);
328 test_tls_discard_cert(&cacertreq);
329
330 test_tls_cleanup(KEYFILE);
331 rmdir(WORKDIR);
332
333 return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
334 }
335