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/tlscredsx509.h"
  31#include "qemu/acl.h"
  32#include "qom/object_interfaces.h"
  33
  34#ifdef QCRYPTO_HAVE_TLS_TEST_SUPPORT
  35
  36#define WORKDIR "tests/test-io-channel-tls-work/"
  37#define KEYFILE WORKDIR "key-ctx.pem"
  38
  39struct QIOChannelTLSTestData {
  40    const char *servercacrt;
  41    const char *clientcacrt;
  42    const char *servercrt;
  43    const char *clientcrt;
  44    bool expectServerFail;
  45    bool expectClientFail;
  46    const char *hostname;
  47    const char *const *wildcards;
  48};
  49
  50struct QIOChannelTLSHandshakeData {
  51    bool finished;
  52    bool failed;
  53};
  54
  55static void test_tls_handshake_done(Object *source,
  56                                    Error *err,
  57                                    gpointer opaque)
  58{
  59    struct QIOChannelTLSHandshakeData *data = opaque;
  60
  61    data->finished = true;
  62    data->failed = err != NULL;
  63}
  64
  65
  66static QCryptoTLSCreds *test_tls_creds_create(QCryptoTLSCredsEndpoint endpoint,
  67                                              const char *certdir,
  68                                              Error **errp)
  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        errp,
  77        "endpoint", (endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
  78                     "server" : "client"),
  79        "dir", certdir,
  80        "verify-peer", "yes",
  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    if (*errp) {
  92        return NULL;
  93    }
  94    return QCRYPTO_TLS_CREDS(creds);
  95}
  96
  97
  98/*
  99 * This tests validation checking of peer certificates
 100 *
 101 * This is replicating the checks that are done for an
 102 * active TLS session after handshake completes. To
 103 * simulate that we create our TLS contexts, skipping
 104 * sanity checks. When then get a socketpair, and
 105 * initiate a TLS session across them. Finally do
 106 * do actual cert validation tests
 107 */
 108static void test_io_channel_tls(const void *opaque)
 109{
 110    struct QIOChannelTLSTestData *data =
 111        (struct QIOChannelTLSTestData *)opaque;
 112    QCryptoTLSCreds *clientCreds;
 113    QCryptoTLSCreds *serverCreds;
 114    QIOChannelTLS *clientChanTLS;
 115    QIOChannelTLS *serverChanTLS;
 116    QIOChannelSocket *clientChanSock;
 117    QIOChannelSocket *serverChanSock;
 118    qemu_acl *acl;
 119    const char * const *wildcards;
 120    int channel[2];
 121    struct QIOChannelTLSHandshakeData clientHandshake = { false, false };
 122    struct QIOChannelTLSHandshakeData serverHandshake = { false, false };
 123    Error *err = NULL;
 124    QIOChannelTest *test;
 125    GMainContext *mainloop;
 126
 127    /* We'll use this for our fake client-server connection */
 128    g_assert(socketpair(AF_UNIX, SOCK_STREAM, 0, channel) == 0);
 129
 130#define CLIENT_CERT_DIR "tests/test-crypto-tlssession-client/"
 131#define SERVER_CERT_DIR "tests/test-crypto-tlssession-server/"
 132    mkdir(CLIENT_CERT_DIR, 0700);
 133    mkdir(SERVER_CERT_DIR, 0700);
 134
 135    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
 136    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT);
 137    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY);
 138
 139    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
 140    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
 141    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
 142
 143    g_assert(link(data->servercacrt,
 144                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
 145    g_assert(link(data->servercrt,
 146                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT) == 0);
 147    g_assert(link(KEYFILE,
 148                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY) == 0);
 149
 150    g_assert(link(data->clientcacrt,
 151                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
 152    g_assert(link(data->clientcrt,
 153                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT) == 0);
 154    g_assert(link(KEYFILE,
 155                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY) == 0);
 156
 157    clientCreds = test_tls_creds_create(
 158        QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT,
 159        CLIENT_CERT_DIR,
 160        &err);
 161    g_assert(clientCreds != NULL);
 162
 163    serverCreds = test_tls_creds_create(
 164        QCRYPTO_TLS_CREDS_ENDPOINT_SERVER,
 165        SERVER_CERT_DIR,
 166        &err);
 167    g_assert(serverCreds != NULL);
 168
 169    acl = qemu_acl_init("channeltlsacl");
 170    qemu_acl_reset(acl);
 171    wildcards = data->wildcards;
 172    while (wildcards && *wildcards) {
 173        qemu_acl_append(acl, 0, *wildcards);
 174        wildcards++;
 175    }
 176
 177    clientChanSock = qio_channel_socket_new_fd(
 178        channel[0], &err);
 179    g_assert(clientChanSock != NULL);
 180    serverChanSock = qio_channel_socket_new_fd(
 181        channel[1], &err);
 182    g_assert(serverChanSock != NULL);
 183
 184    /*
 185     * We have an evil loop to do the handshake in a single
 186     * thread, so we need these non-blocking to avoid deadlock
 187     * of ourselves
 188     */
 189    qio_channel_set_blocking(QIO_CHANNEL(clientChanSock), false, NULL);
 190    qio_channel_set_blocking(QIO_CHANNEL(serverChanSock), false, NULL);
 191
 192    /* Now the real part of the test, setup the sessions */
 193    clientChanTLS = qio_channel_tls_new_client(
 194        QIO_CHANNEL(clientChanSock), clientCreds,
 195        data->hostname, &err);
 196    g_assert(clientChanTLS != NULL);
 197
 198    serverChanTLS = qio_channel_tls_new_server(
 199        QIO_CHANNEL(serverChanSock), serverCreds,
 200        "channeltlsacl", &err);
 201    g_assert(serverChanTLS != NULL);
 202
 203    qio_channel_tls_handshake(clientChanTLS,
 204                              test_tls_handshake_done,
 205                              &clientHandshake,
 206                              NULL);
 207    qio_channel_tls_handshake(serverChanTLS,
 208                              test_tls_handshake_done,
 209                              &serverHandshake,
 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    close(channel[0]);
 260    close(channel[1]);
 261}
 262
 263
 264int main(int argc, char **argv)
 265{
 266    int ret;
 267
 268    module_call_init(MODULE_INIT_QOM);
 269    g_test_init(&argc, &argv, NULL);
 270    setenv("GNUTLS_FORCE_FIPS_MODE", "2", 1);
 271
 272    mkdir(WORKDIR, 0700);
 273
 274    test_tls_init(KEYFILE);
 275
 276# define TEST_CHANNEL(name, caCrt,                                      \
 277                      serverCrt, clientCrt,                             \
 278                      expectServerFail, expectClientFail,               \
 279                      hostname, wildcards)                              \
 280    struct QIOChannelTLSTestData name = {                               \
 281        caCrt, caCrt, serverCrt, clientCrt,                             \
 282        expectServerFail, expectClientFail,                             \
 283        hostname, wildcards                                             \
 284    };                                                                  \
 285    g_test_add_data_func("/qio/channel/tls/" # name,                    \
 286                         &name, test_io_channel_tls);
 287
 288    /* A perfect CA, perfect client & perfect server */
 289
 290    /* Basic:CA:critical */
 291    TLS_ROOT_REQ(cacertreq,
 292                 "UK", "qemu CA", NULL, NULL, NULL, NULL,
 293                 true, true, true,
 294                 true, true, GNUTLS_KEY_KEY_CERT_SIGN,
 295                 false, false, NULL, NULL,
 296                 0, 0);
 297    TLS_CERT_REQ(servercertreq, cacertreq,
 298                 "UK", "qemu.org", NULL, NULL, NULL, NULL,
 299                 true, true, false,
 300                 true, true,
 301                 GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
 302                 true, true, GNUTLS_KP_TLS_WWW_SERVER, NULL,
 303                 0, 0);
 304    TLS_CERT_REQ(clientcertreq, cacertreq,
 305                 "UK", "qemu", NULL, NULL, NULL, NULL,
 306                 true, true, false,
 307                 true, true,
 308                 GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
 309                 true, true, GNUTLS_KP_TLS_WWW_CLIENT, NULL,
 310                 0, 0);
 311
 312    const char *const wildcards[] = {
 313        "C=UK,CN=qemu*",
 314        NULL,
 315    };
 316    TEST_CHANNEL(basic, cacertreq.filename, servercertreq.filename,
 317                 clientcertreq.filename, false, false,
 318                 "qemu.org", wildcards);
 319
 320    ret = g_test_run();
 321
 322    test_tls_discard_cert(&clientcertreq);
 323    test_tls_discard_cert(&servercertreq);
 324    test_tls_discard_cert(&cacertreq);
 325
 326    test_tls_cleanup(KEYFILE);
 327    rmdir(WORKDIR);
 328
 329    return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 330}
 331
 332#else /* ! QCRYPTO_HAVE_TLS_TEST_SUPPORT */
 333
 334int
 335main(void)
 336{
 337    return EXIT_SUCCESS;
 338}
 339
 340#endif /* ! QCRYPTO_HAVE_TLS_TEST_SUPPORT */
 341