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 "qemu/acl.h"
  33#include "qom/object_interfaces.h"
  34
  35#ifdef QCRYPTO_HAVE_TLS_TEST_SUPPORT
  36
  37#define WORKDIR "tests/test-io-channel-tls-work/"
  38#define KEYFILE WORKDIR "key-ctx.pem"
  39
  40struct 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
  51struct QIOChannelTLSHandshakeData {
  52    bool finished;
  53    bool failed;
  54};
  55
  56static void test_tls_handshake_done(Object *source,
  57                                    Error *err,
  58                                    gpointer opaque)
  59{
  60    struct QIOChannelTLSHandshakeData *data = opaque;
  61
  62    data->finished = true;
  63    data->failed = err != NULL;
  64}
  65
  66
  67static QCryptoTLSCreds *test_tls_creds_create(QCryptoTLSCredsEndpoint endpoint,
  68                                              const char *certdir,
  69                                              Error **errp)
  70{
  71    Object *parent = object_get_objects_root();
  72    Object *creds = object_new_with_props(
  73        TYPE_QCRYPTO_TLS_CREDS_X509,
  74        parent,
  75        (endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
  76         "testtlscredsserver" : "testtlscredsclient"),
  77        errp,
  78        "endpoint", (endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
  79                     "server" : "client"),
  80        "dir", certdir,
  81        "verify-peer", "yes",
  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    if (*errp) {
  93        return NULL;
  94    }
  95    return QCRYPTO_TLS_CREDS(creds);
  96}
  97
  98
  99/*
 100 * This tests validation checking of peer certificates
 101 *
 102 * This is replicating the checks that are done for an
 103 * active TLS session after handshake completes. To
 104 * simulate that we create our TLS contexts, skipping
 105 * sanity checks. When then get a socketpair, and
 106 * initiate a TLS session across them. Finally do
 107 * do actual cert validation tests
 108 */
 109static void test_io_channel_tls(const void *opaque)
 110{
 111    struct QIOChannelTLSTestData *data =
 112        (struct QIOChannelTLSTestData *)opaque;
 113    QCryptoTLSCreds *clientCreds;
 114    QCryptoTLSCreds *serverCreds;
 115    QIOChannelTLS *clientChanTLS;
 116    QIOChannelTLS *serverChanTLS;
 117    QIOChannelSocket *clientChanSock;
 118    QIOChannelSocket *serverChanSock;
 119    qemu_acl *acl;
 120    const char * const *wildcards;
 121    int channel[2];
 122    struct QIOChannelTLSHandshakeData clientHandshake = { false, false };
 123    struct QIOChannelTLSHandshakeData serverHandshake = { false, false };
 124    Error *err = NULL;
 125    QIOChannelTest *test;
 126    GMainContext *mainloop;
 127
 128    /* We'll use this for our fake client-server connection */
 129    g_assert(socketpair(AF_UNIX, SOCK_STREAM, 0, channel) == 0);
 130
 131#define CLIENT_CERT_DIR "tests/test-crypto-tlssession-client/"
 132#define SERVER_CERT_DIR "tests/test-crypto-tlssession-server/"
 133    mkdir(CLIENT_CERT_DIR, 0700);
 134    mkdir(SERVER_CERT_DIR, 0700);
 135
 136    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
 137    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT);
 138    unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY);
 139
 140    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
 141    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
 142    unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
 143
 144    g_assert(link(data->servercacrt,
 145                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
 146    g_assert(link(data->servercrt,
 147                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT) == 0);
 148    g_assert(link(KEYFILE,
 149                  SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY) == 0);
 150
 151    g_assert(link(data->clientcacrt,
 152                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
 153    g_assert(link(data->clientcrt,
 154                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT) == 0);
 155    g_assert(link(KEYFILE,
 156                  CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY) == 0);
 157
 158    clientCreds = test_tls_creds_create(
 159        QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT,
 160        CLIENT_CERT_DIR,
 161        &err);
 162    g_assert(clientCreds != NULL);
 163
 164    serverCreds = test_tls_creds_create(
 165        QCRYPTO_TLS_CREDS_ENDPOINT_SERVER,
 166        SERVER_CERT_DIR,
 167        &err);
 168    g_assert(serverCreds != NULL);
 169
 170    acl = qemu_acl_init("channeltlsacl");
 171    qemu_acl_reset(acl);
 172    wildcards = data->wildcards;
 173    while (wildcards && *wildcards) {
 174        qemu_acl_append(acl, 0, *wildcards);
 175        wildcards++;
 176    }
 177
 178    clientChanSock = qio_channel_socket_new_fd(
 179        channel[0], &err);
 180    g_assert(clientChanSock != NULL);
 181    serverChanSock = qio_channel_socket_new_fd(
 182        channel[1], &err);
 183    g_assert(serverChanSock != NULL);
 184
 185    /*
 186     * We have an evil loop to do the handshake in a single
 187     * thread, so we need these non-blocking to avoid deadlock
 188     * of ourselves
 189     */
 190    qio_channel_set_blocking(QIO_CHANNEL(clientChanSock), false, NULL);
 191    qio_channel_set_blocking(QIO_CHANNEL(serverChanSock), false, NULL);
 192
 193    /* Now the real part of the test, setup the sessions */
 194    clientChanTLS = qio_channel_tls_new_client(
 195        QIO_CHANNEL(clientChanSock), clientCreds,
 196        data->hostname, &err);
 197    g_assert(clientChanTLS != NULL);
 198
 199    serverChanTLS = qio_channel_tls_new_server(
 200        QIO_CHANNEL(serverChanSock), serverCreds,
 201        "channeltlsacl", &err);
 202    g_assert(serverChanTLS != NULL);
 203
 204    qio_channel_tls_handshake(clientChanTLS,
 205                              test_tls_handshake_done,
 206                              &clientHandshake,
 207                              NULL);
 208    qio_channel_tls_handshake(serverChanTLS,
 209                              test_tls_handshake_done,
 210                              &serverHandshake,
 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    close(channel[0]);
 261    close(channel[1]);
 262}
 263
 264
 265int main(int argc, char **argv)
 266{
 267    int ret;
 268
 269    g_assert(qcrypto_init(NULL) == 0);
 270
 271    module_call_init(MODULE_INIT_QOM);
 272    g_test_init(&argc, &argv, NULL);
 273    setenv("GNUTLS_FORCE_FIPS_MODE", "2", 1);
 274
 275    mkdir(WORKDIR, 0700);
 276
 277    test_tls_init(KEYFILE);
 278
 279# define TEST_CHANNEL(name, caCrt,                                      \
 280                      serverCrt, clientCrt,                             \
 281                      expectServerFail, expectClientFail,               \
 282                      hostname, wildcards)                              \
 283    struct QIOChannelTLSTestData name = {                               \
 284        caCrt, caCrt, serverCrt, clientCrt,                             \
 285        expectServerFail, expectClientFail,                             \
 286        hostname, wildcards                                             \
 287    };                                                                  \
 288    g_test_add_data_func("/qio/channel/tls/" # name,                    \
 289                         &name, test_io_channel_tls);
 290
 291    /* A perfect CA, perfect client & perfect server */
 292
 293    /* Basic:CA:critical */
 294    TLS_ROOT_REQ(cacertreq,
 295                 "UK", "qemu CA", NULL, NULL, NULL, NULL,
 296                 true, true, true,
 297                 true, true, GNUTLS_KEY_KEY_CERT_SIGN,
 298                 false, false, NULL, NULL,
 299                 0, 0);
 300    TLS_CERT_REQ(servercertreq, cacertreq,
 301                 "UK", "qemu.org", NULL, NULL, NULL, NULL,
 302                 true, true, false,
 303                 true, true,
 304                 GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
 305                 true, true, GNUTLS_KP_TLS_WWW_SERVER, NULL,
 306                 0, 0);
 307    TLS_CERT_REQ(clientcertreq, cacertreq,
 308                 "UK", "qemu", NULL, NULL, NULL, NULL,
 309                 true, true, false,
 310                 true, true,
 311                 GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
 312                 true, true, GNUTLS_KP_TLS_WWW_CLIENT, NULL,
 313                 0, 0);
 314
 315    const char *const wildcards[] = {
 316        "C=UK,CN=qemu*",
 317        NULL,
 318    };
 319    TEST_CHANNEL(basic, cacertreq.filename, servercertreq.filename,
 320                 clientcertreq.filename, false, false,
 321                 "qemu.org", wildcards);
 322
 323    ret = g_test_run();
 324
 325    test_tls_discard_cert(&clientcertreq);
 326    test_tls_discard_cert(&servercertreq);
 327    test_tls_discard_cert(&cacertreq);
 328
 329    test_tls_cleanup(KEYFILE);
 330    rmdir(WORKDIR);
 331
 332    return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 333}
 334
 335#else /* ! QCRYPTO_HAVE_TLS_TEST_SUPPORT */
 336
 337int
 338main(void)
 339{
 340    return EXIT_SUCCESS;
 341}
 342
 343#endif /* ! QCRYPTO_HAVE_TLS_TEST_SUPPORT */
 344