LXR qemu/tests/test-io-channel-tls.c

   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 "authz/list.h"
  34#include "qom/object_interfaces.h"
  35
  36#ifdef QCRYPTO_HAVE_TLS_TEST_SUPPORT
  37
  38#define WORKDIR "tests/test-io-channel-tls-work/"
  39#define KEYFILE WORKDIR "key-ctx.pem"
  40
  41struct QIOChannelTLSTestData {
  42    const char *servercacrt;
  43    const char *clientcacrt;
  44    const char *servercrt;
  45    const char *clientcrt;
  46    bool expectServerFail;
  47    bool expectClientFail;
  48    const char *hostname;
  49    const char *const *wildcards;
  50};
  51
  52struct QIOChannelTLSHandshakeData {
  53    bool finished;
  54    bool failed;
  55};
  56
  57static void test_tls_handshake_done(QIOTask *task,
  58                                    gpointer opaque)
  59{
  60    struct QIOChannelTLSHandshakeData *data = opaque;
  61
  62    data->finished = true;
  63    data->failed = qio_task_propagate_error(task, NULL);
  64}
  65
  66
  67static QCryptoTLSCreds *test_tls_creds_create(QCryptoTLSCredsEndpoint endpoint,
  68                                              const char *certdir)
  69{
  70    Object *parent = object_get_objects_root();
  71    Object *creds = object_new_with_props(
  72        TYPE_QCRYPTO_TLS_CREDS_X509,
  73        parent,
  74        (endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
  75         "testtlscredsserver" : "testtlscredsclient"),
  76        &error_abort,
  77        "endpoint", (endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
  78                     "server" : "client"),
  79        "dir", certdir,
  80        "verify-peer", "yes",
  81        "priority", "NORMAL",
  82        /* We skip initial sanity checks here because we
  83         * want to make sure that problems are being
  84         * detected at the TLS session validation stage,
  85         * and the test-crypto-tlscreds test already
  86         * validate the sanity check code.
  87         */
  88        "sanity-check", "no",
  89        NULL
  90        );
  91
  92    return QCRYPTO_TLS_CREDS(creds);
  93}
  94
  95
  96/*
  97 * This tests validation checking of peer certificates
  98 *
  99 * This is replicating the checks that are done for an
 100 * active TLS session after handshake completes. To
 101 * simulate that we create our TLS contexts, skipping
 102 * sanity checks. When then get a socketpair, and
 103 * initiate a TLS session across them. Finally do
 104 * do actual cert validation tests
 105 */
 106static void test_io_channel_tls(const void *opaque)
 107{
 108    struct QIOChannelTLSTestData *data =
 109        (struct QIOChannelTLSTestData *)opaque;
 110    QCryptoTLSCreds *clientCreds;
 111    QCryptoTLSCreds *serverCreds;
 112    QIOChannelTLS *clientChanTLS;
 113    QIOChannelTLS *serverChanTLS;
 114    QIOChannelSocket *clientChanSock;
 115    QIOChannelSocket *serverChanSock;
 116    QAuthZList *auth;
 117    const char * const *wildcards;
 118    int channel[2];
 119    struct QIOChannelTLSHandshakeData clientHandshake = { false, false };
 120    struct QIOChannelTLSHandshakeData serverHandshake = { false, false };
 121    QIOChannelTest *test;
 122    GMainContext *mainloop;
 123
 124    /* We'll use this for our fake client-server connection */
 125    g_assert(socketpair(AF_UNIX, SOCK_STREAM, 0, channel) == 0);
 126
 127#define CLIENT_CERT_DIR "tests/test-io-channel-tls-client/"
 128#define SERVER_CERT_DIR "tests/test-io-channel-tls-server/"
 129    mkdir(CLIENT_CERT_DIR, 0700);
 130    mkdir(SERVER_CERT_DIR, 0700);
 131
 132    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
 133    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT);
 134    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY);
 135
 136    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
 137    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
 138    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
 139
 140    g_assert(link(data->servercacrt,
 141                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
 142    g_assert(link(data->servercrt,
 143                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT) == 0);
 144    g_assert(link(KEYFILE,
 145                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY) == 0);
 146
 147    g_assert(link(data->clientcacrt,
 148                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
 149    g_assert(link(data->clientcrt,
 150                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT) == 0);
 151    g_assert(link(KEYFILE,
 152                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY) == 0);
 153
 154    clientCreds = test_tls_creds_create(
 155        QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT,
 156        CLIENT_CERT_DIR);
 157    g_assert(clientCreds != NULL);
 158
 159    serverCreds = test_tls_creds_create(
 160        QCRYPTO_TLS_CREDS_ENDPOINT_SERVER,
 161        SERVER_CERT_DIR);
 162    g_assert(serverCreds != NULL);
 163
 164    auth = qauthz_list_new("channeltlsacl",
 165                           QAUTHZ_LIST_POLICY_DENY,
 166                           &error_abort);
 167    wildcards = data->wildcards;
 168    while (wildcards && *wildcards) {
 169        qauthz_list_append_rule(auth, *wildcards,
 170                                QAUTHZ_LIST_POLICY_ALLOW,
 171                                QAUTHZ_LIST_FORMAT_GLOB,
 172                                &error_abort);
 173        wildcards++;
 174    }
 175
 176    clientChanSock = qio_channel_socket_new_fd(
 177        channel[0], &error_abort);
 178    g_assert(clientChanSock != NULL);
 179    serverChanSock = qio_channel_socket_new_fd(
 180        channel[1], &error_abort);
 181    g_assert(serverChanSock != NULL);
 182
 183    /*
 184     * We have an evil loop to do the handshake in a single
 185     * thread, so we need these non-blocking to avoid deadlock
 186     * of ourselves
 187     */
 188    qio_channel_set_blocking(QIO_CHANNEL(clientChanSock), false, NULL);
 189    qio_channel_set_blocking(QIO_CHANNEL(serverChanSock), false, NULL);
 190
 191    /* Now the real part of the test, setup the sessions */
 192    clientChanTLS = qio_channel_tls_new_client(
 193        QIO_CHANNEL(clientChanSock), clientCreds,
 194        data->hostname, &error_abort);
 195    g_assert(clientChanTLS != NULL);
 196
 197    serverChanTLS = qio_channel_tls_new_server(
 198        QIO_CHANNEL(serverChanSock), serverCreds,
 199        "channeltlsacl", &error_abort);
 200    g_assert(serverChanTLS != NULL);
 201
 202    qio_channel_tls_handshake(clientChanTLS,
 203                              test_tls_handshake_done,
 204                              &clientHandshake,
 205                              NULL,
 206                              NULL);
 207    qio_channel_tls_handshake(serverChanTLS,
 208                              test_tls_handshake_done,
 209                              &serverHandshake,
 210                              NULL,
 211                              NULL);
 212
 213    /*
 214     * Finally we loop around & around doing handshake on each
 215     * session until we get an error, or the handshake completes.
 216     * This relies on the socketpair being nonblocking to avoid
 217     * deadlocking ourselves upon handshake
 218     */
 219    mainloop = g_main_context_default();
 220    do {
 221        g_main_context_iteration(mainloop, TRUE);
 222    } while (!clientHandshake.finished ||
 223             !serverHandshake.finished);
 224
 225    g_assert(clientHandshake.failed == data->expectClientFail);
 226    g_assert(serverHandshake.failed == data->expectServerFail);
 227
 228    test = qio_channel_test_new();
 229    qio_channel_test_run_threads(test, false,
 230                                 QIO_CHANNEL(clientChanTLS),
 231                                 QIO_CHANNEL(serverChanTLS));
 232    qio_channel_test_validate(test);
 233
 234    test = qio_channel_test_new();
 235    qio_channel_test_run_threads(test, true,
 236                                 QIO_CHANNEL(clientChanTLS),
 237                                 QIO_CHANNEL(serverChanTLS));
 238    qio_channel_test_validate(test);
 239
 240    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
 241    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT);
 242    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY);
 243
 244    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
 245    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
 246    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
 247
 248    rmdir(CLIENT_CERT_DIR);
 249    rmdir(SERVER_CERT_DIR);
 250
 251    object_unparent(OBJECT(serverCreds));
 252    object_unparent(OBJECT(clientCreds));
 253
 254    object_unref(OBJECT(serverChanTLS));
 255    object_unref(OBJECT(clientChanTLS));
 256
 257    object_unref(OBJECT(serverChanSock));
 258    object_unref(OBJECT(clientChanSock));
 259
 260    object_unparent(OBJECT(auth));
 261
 262    close(channel[0]);
 263    close(channel[1]);
 264}
 265
 266
 267int main(int argc, char **argv)
 268{
 269    int ret;
 270
 271    g_assert(qcrypto_init(NULL) == 0);
 272
 273    module_call_init(MODULE_INIT_QOM);
 274    g_test_init(&argc, &argv, NULL);
 275    setenv("GNUTLS_FORCE_FIPS_MODE", "2", 1);
 276
 277    mkdir(WORKDIR, 0700);
 278
 279    test_tls_init(KEYFILE);
 280
 281# define TEST_CHANNEL(name, caCrt,                                      \
 282                      serverCrt, clientCrt,                             \
 283                      expectServerFail, expectClientFail,               \
 284                      hostname, wildcards)                              \
 285    struct QIOChannelTLSTestData name = {                               \
 286        caCrt, caCrt, serverCrt, clientCrt,                             \
 287        expectServerFail, expectClientFail,                             \
 288        hostname, wildcards                                             \
 289    };                                                                  \
 290    g_test_add_data_func("/qio/channel/tls/" # name,                    \
 291                         &name, test_io_channel_tls);
 292
 293    /* A perfect CA, perfect client & perfect server */
 294
 295    /* Basic:CA:critical */
 296    TLS_ROOT_REQ(cacertreq,
 297                 "UK", "qemu CA", NULL, NULL, NULL, NULL,
 298                 true, true, true,
 299                 true, true, GNUTLS_KEY_KEY_CERT_SIGN,
 300                 false, false, NULL, NULL,
 301                 0, 0);
 302    TLS_CERT_REQ(servercertreq, cacertreq,
 303                 "UK", "qemu.org", NULL, NULL, NULL, NULL,
 304                 true, true, false,
 305                 true, true,
 306                 GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
 307                 true, true, GNUTLS_KP_TLS_WWW_SERVER, NULL,
 308                 0, 0);
 309    TLS_CERT_REQ(clientcertreq, cacertreq,
 310                 "UK", "qemu", NULL, NULL, NULL, NULL,
 311                 true, true, false,
 312                 true, true,
 313                 GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
 314                 true, true, GNUTLS_KP_TLS_WWW_CLIENT, NULL,
 315                 0, 0);
 316
 317    const char *const wildcards[] = {
 318        "C=UK,CN=qemu*",
 319        NULL,
 320    };
 321    TEST_CHANNEL(basic, cacertreq.filename, servercertreq.filename,
 322                 clientcertreq.filename, false, false,
 323                 "qemu.org", wildcards);
 324
 325    ret = g_test_run();
 326
 327    test_tls_discard_cert(&clientcertreq);
 328    test_tls_discard_cert(&servercertreq);
 329    test_tls_discard_cert(&cacertreq);
 330
 331    test_tls_cleanup(KEYFILE);
 332    rmdir(WORKDIR);
 333
 334    return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 335}
 336
 337#else /* ! QCRYPTO_HAVE_TLS_TEST_SUPPORT */
 338
 339int
 340main(void)
 341{
 342    return EXIT_SUCCESS;
 343}
 344
 345#endif /* ! QCRYPTO_HAVE_TLS_TEST_SUPPORT */
 346