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

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/*
* QEMU I/O channel TLS test
*
* Copyright (C) 2015 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include "qemu/osdep.h"
#include "crypto-tls-x509-helpers.h"
#include "io/channel-tls.h"
#include "io/channel-socket.h"
#include "io-channel-helpers.h"
#include "crypto/init.h"
#include "crypto/tlscredsx509.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "authz/list.h"
#include "qom/object_interfaces.h"
#define WORKDIR "tests/test-io-channel-tls-work/"
#define KEYFILE WORKDIR "key-ctx.pem"
struct QIOChannelTLSTestData {
const char *servercacrt;
const char *clientcacrt;
const char *servercrt;
const char *clientcrt;
bool expectServerFail;
bool expectClientFail;
const char *hostname;
const char *const *wildcards;
};
struct QIOChannelTLSHandshakeData {
bool finished;
bool failed;
};
static void test_tls_handshake_done(QIOTask *task,
gpointer opaque)
{
struct QIOChannelTLSHandshakeData *data = opaque;
data->finished = true;
data->failed = qio_task_propagate_error(task, NULL);
}
static QCryptoTLSCreds *test_tls_creds_create(QCryptoTLSCredsEndpoint endpoint,
const char *certdir)
{
Object *parent = object_get_objects_root();
Object *creds = object_new_with_props(
TYPE_QCRYPTO_TLS_CREDS_X509,
parent,
(endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
"testtlscredsserver" : "testtlscredsclient"),
&error_abort,
"endpoint", (endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_SERVER ?
"server" : "client"),
"dir", certdir,
"verify-peer", "yes",
"priority", "NORMAL",
/* We skip initial sanity checks here because we
* want to make sure that problems are being
* detected at the TLS session validation stage,
* and the test-crypto-tlscreds test already
* validate the sanity check code.
*/
"sanity-check", "no",
NULL
);
return QCRYPTO_TLS_CREDS(creds);
}
/*
* This tests validation checking of peer certificates
*
* This is replicating the checks that are done for an
* active TLS session after handshake completes. To
* simulate that we create our TLS contexts, skipping
* sanity checks. When then get a socketpair, and
* initiate a TLS session across them. Finally do
* do actual cert validation tests
*/
static void test_io_channel_tls(const void *opaque)
{
struct QIOChannelTLSTestData *data =
(struct QIOChannelTLSTestData *)opaque;
QCryptoTLSCreds *clientCreds;
QCryptoTLSCreds *serverCreds;
QIOChannelTLS *clientChanTLS;
QIOChannelTLS *serverChanTLS;
QIOChannelSocket *clientChanSock;
QIOChannelSocket *serverChanSock;
QAuthZList *auth;
const char * const *wildcards;
int channel[2];
struct QIOChannelTLSHandshakeData clientHandshake = { false, false };
struct QIOChannelTLSHandshakeData serverHandshake = { false, false };
QIOChannelTest *test;
GMainContext *mainloop;
/* We'll use this for our fake client-server connection */
g_assert(socketpair(AF_UNIX, SOCK_STREAM, 0, channel) == 0);
#define CLIENT_CERT_DIR "tests/test-io-channel-tls-client/"
#define SERVER_CERT_DIR "tests/test-io-channel-tls-server/"
mkdir(CLIENT_CERT_DIR, 0700);
mkdir(SERVER_CERT_DIR, 0700);
unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT);
unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY);
unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
g_assert(link(data->servercacrt,
SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
g_assert(link(data->servercrt,
SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT) == 0);
g_assert(link(KEYFILE,
SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY) == 0);
g_assert(link(data->clientcacrt,
CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT) == 0);
g_assert(link(data->clientcrt,
CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT) == 0);
g_assert(link(KEYFILE,
CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY) == 0);
clientCreds = test_tls_creds_create(
QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT,
CLIENT_CERT_DIR);
g_assert(clientCreds != NULL);
serverCreds = test_tls_creds_create(
QCRYPTO_TLS_CREDS_ENDPOINT_SERVER,
SERVER_CERT_DIR);
g_assert(serverCreds != NULL);
auth = qauthz_list_new("channeltlsacl",
QAUTHZ_LIST_POLICY_DENY,
&error_abort);
wildcards = data->wildcards;
while (wildcards && *wildcards) {
qauthz_list_append_rule(auth, *wildcards,
QAUTHZ_LIST_POLICY_ALLOW,
QAUTHZ_LIST_FORMAT_GLOB,
&error_abort);
wildcards++;
}
clientChanSock = qio_channel_socket_new_fd(
channel[0], &error_abort);
g_assert(clientChanSock != NULL);
serverChanSock = qio_channel_socket_new_fd(
channel[1], &error_abort);
g_assert(serverChanSock != NULL);
/*
* We have an evil loop to do the handshake in a single
* thread, so we need these non-blocking to avoid deadlock
* of ourselves
*/
qio_channel_set_blocking(QIO_CHANNEL(clientChanSock), false, NULL);
qio_channel_set_blocking(QIO_CHANNEL(serverChanSock), false, NULL);
/* Now the real part of the test, setup the sessions */
clientChanTLS = qio_channel_tls_new_client(
QIO_CHANNEL(clientChanSock), clientCreds,
data->hostname, &error_abort);
g_assert(clientChanTLS != NULL);
serverChanTLS = qio_channel_tls_new_server(
QIO_CHANNEL(serverChanSock), serverCreds,
"channeltlsacl", &error_abort);
g_assert(serverChanTLS != NULL);
qio_channel_tls_handshake(clientChanTLS,
test_tls_handshake_done,
&clientHandshake,
NULL,
NULL);
qio_channel_tls_handshake(serverChanTLS,
test_tls_handshake_done,
&serverHandshake,
NULL,
NULL);
/*
* Finally we loop around & around doing handshake on each
* session until we get an error, or the handshake completes.
* This relies on the socketpair being nonblocking to avoid
* deadlocking ourselves upon handshake
*/
mainloop = g_main_context_default();
do {
g_main_context_iteration(mainloop, TRUE);
} while (!clientHandshake.finished ||
!serverHandshake.finished);
g_assert(clientHandshake.failed == data->expectClientFail);
g_assert(serverHandshake.failed == data->expectServerFail);
test = qio_channel_test_new();
qio_channel_test_run_threads(test, false,
QIO_CHANNEL(clientChanTLS),
QIO_CHANNEL(serverChanTLS));
qio_channel_test_validate(test);
test = qio_channel_test_new();
qio_channel_test_run_threads(test, true,
QIO_CHANNEL(clientChanTLS),
QIO_CHANNEL(serverChanTLS));
qio_channel_test_validate(test);
unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_CERT);
unlink(SERVER_CERT_DIR QCRYPTO_TLS_CREDS_X509_SERVER_KEY);
unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CA_CERT);
unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_CERT);
unlink(CLIENT_CERT_DIR QCRYPTO_TLS_CREDS_X509_CLIENT_KEY);
rmdir(CLIENT_CERT_DIR);
rmdir(SERVER_CERT_DIR);
object_unparent(OBJECT(serverCreds));
object_unparent(OBJECT(clientCreds));
object_unref(OBJECT(serverChanTLS));
object_unref(OBJECT(clientChanTLS));
object_unref(OBJECT(serverChanSock));
object_unref(OBJECT(clientChanSock));
object_unparent(OBJECT(auth));
close(channel[0]);
close(channel[1]);
}
int main(int argc, char **argv)
{
int ret;
g_assert(qcrypto_init(NULL) == 0);
module_call_init(MODULE_INIT_QOM);
g_test_init(&argc, &argv, NULL);
g_setenv("GNUTLS_FORCE_FIPS_MODE", "2", 1);
mkdir(WORKDIR, 0700);
test_tls_init(KEYFILE);
# define TEST_CHANNEL(name, caCrt, \
serverCrt, clientCrt, \
expectServerFail, expectClientFail, \
hostname, wildcards) \
struct QIOChannelTLSTestData name = { \
caCrt, caCrt, serverCrt, clientCrt, \
expectServerFail, expectClientFail, \
hostname, wildcards \
}; \
g_test_add_data_func("/qio/channel/tls/" # name, \
&name, test_io_channel_tls);
/* A perfect CA, perfect client & perfect server */
/* Basic:CA:critical */
TLS_ROOT_REQ(cacertreq,
"UK", "qemu CA", NULL, NULL, NULL, NULL,
true, true, true,
true, true, GNUTLS_KEY_KEY_CERT_SIGN,
false, false, NULL, NULL,
0, 0);
TLS_CERT_REQ(servercertreq, cacertreq,
"UK", "qemu.org", NULL, NULL, NULL, NULL,
true, true, false,
true, true,
GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
true, true, GNUTLS_KP_TLS_WWW_SERVER, NULL,
0, 0);
TLS_CERT_REQ(clientcertreq, cacertreq,
"UK", "qemu", NULL, NULL, NULL, NULL,
true, true, false,
true, true,
GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
true, true, GNUTLS_KP_TLS_WWW_CLIENT, NULL,
0, 0);
const char *const wildcards[] = {
"C=UK,CN=qemu*",
NULL,
};
TEST_CHANNEL(basic, cacertreq.filename, servercertreq.filename,
clientcertreq.filename, false, false,
"qemu.org", wildcards);
ret = g_test_run();
test_tls_discard_cert(&clientcertreq);
test_tls_discard_cert(&servercertreq);
test_tls_discard_cert(&cacertreq);
test_tls_cleanup(KEYFILE);
rmdir(WORKDIR);
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
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