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libvirt/tests/virnettlssessiontest.c

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/*
* Copyright (C) 2011-2012, 2014 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/>.
*/
#include <config.h>
#include <fcntl.h>
#include "testutils.h"
#include "virnettlshelpers.h"
#include "virutil.h"
#include "virlog.h"
#include "virfile.h"
#if !defined WIN32 && WITH_LIBTASN1_H && LIBGNUTLS_VERSION_NUMBER >= 0x020600
# define VIR_FROM_THIS VIR_FROM_RPC
VIR_LOG_INIT("tests.nettlssessiontest");
# define KEYFILE "key-sess.pem"
struct testTLSSessionData {
const char *servercacrt;
const char *clientcacrt;
const char *servercrt;
const char *clientcrt;
bool expectServerFail;
bool expectClientFail;
const char *hostname;
const char *const* wildcards;
};
static ssize_t testWrite(const char *buf, size_t len, void *opaque)
{
int *fd = opaque;
return write(*fd, buf, len); /* sc_avoid_write */
}
static ssize_t testRead(char *buf, size_t len, void *opaque)
{
int *fd = opaque;
return read(*fd, buf, len);
}
/*
* 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. We then get a socketpair, and
* initiate a TLS session across them. Finally do
* actual cert validation tests
*/
static int testTLSSessionInit(const void *opaque)
{
struct testTLSSessionData *data = (struct testTLSSessionData *)opaque;
virNetTLSContext *clientCtxt = NULL;
virNetTLSContext *serverCtxt = NULL;
virNetTLSSession *clientSess = NULL;
virNetTLSSession *serverSess = NULL;
int ret = -1;
int channel[2];
bool clientShake = false;
bool serverShake = false;
/* We'll use this for our fake client-server connection */
if (socketpair(AF_UNIX, SOCK_STREAM, 0, channel) < 0)
abort();
/*
* We have an evil loop to do the handshake in a single
* thread, so we need these non-blocking to avoid deadlock
* of ourselves
*/
ignore_value(virSetNonBlock(channel[0]));
ignore_value(virSetNonBlock(channel[1]));
/* We skip initial sanity checks here because we
* want to make sure that problems are being
* detected at the TLS session validation stage
*/
serverCtxt = virNetTLSContextNewServer(data->servercacrt,
NULL,
data->servercrt,
KEYFILE,
data->wildcards,
"NORMAL",
false,
true);
clientCtxt = virNetTLSContextNewClient(data->clientcacrt,
NULL,
data->clientcrt,
KEYFILE,
"NORMAL",
false,
true);
if (!serverCtxt) {
VIR_WARN("Unexpected failure loading %s against %s",
data->servercacrt, data->servercrt);
goto cleanup;
}
if (!clientCtxt) {
VIR_WARN("Unexpected failure loading %s against %s",
data->clientcacrt, data->clientcrt);
goto cleanup;
}
/* Now the real part of the test, setup the sessions */
serverSess = virNetTLSSessionNew(serverCtxt, NULL);
clientSess = virNetTLSSessionNew(clientCtxt, data->hostname);
if (!serverSess) {
VIR_WARN("Unexpected failure using %s against %s",
data->servercacrt, data->servercrt);
goto cleanup;
}
if (!clientSess) {
VIR_WARN("Unexpected failure using %s against %s",
data->clientcacrt, data->clientcrt);
goto cleanup;
}
/* For handshake to work, we need to set the I/O callbacks
* to read/write over the socketpair
*/
virNetTLSSessionSetIOCallbacks(serverSess, testWrite, testRead, &channel[0]);
virNetTLSSessionSetIOCallbacks(clientSess, testWrite, testRead, &channel[1]);
/*
* 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
*/
do {
int rv;
if (!serverShake) {
rv = virNetTLSSessionHandshake(serverSess);
if (rv < 0)
goto cleanup;
if (rv == VIR_NET_TLS_HANDSHAKE_COMPLETE)
serverShake = true;
}
if (!clientShake) {
rv = virNetTLSSessionHandshake(clientSess);
if (rv < 0)
goto cleanup;
if (rv == VIR_NET_TLS_HANDSHAKE_COMPLETE)
clientShake = true;
}
} while (!clientShake || !serverShake);
/* Finally make sure the server validation does what
* we were expecting
*/
if (virNetTLSContextCheckCertificate(serverCtxt,
serverSess) < 0) {
if (!data->expectServerFail) {
VIR_WARN("Unexpected server cert check fail");
goto cleanup;
} else {
VIR_DEBUG("Got expected server cert fail");
}
} else {
if (data->expectServerFail) {
VIR_WARN("Expected server cert check fail");
goto cleanup;
} else {
VIR_DEBUG("No unexpected server cert fail");
}
}
/*
* And the same for the client validation check
*/
if (virNetTLSContextCheckCertificate(clientCtxt,
clientSess) < 0) {
if (!data->expectClientFail) {
VIR_WARN("Unexpected client cert check fail");
goto cleanup;
} else {
VIR_DEBUG("Got expected client cert fail");
}
} else {
if (data->expectClientFail) {
VIR_WARN("Expected client cert check fail");
goto cleanup;
} else {
VIR_DEBUG("No unexpected client cert fail");
}
}
ret = 0;
cleanup:
virObjectUnref(serverCtxt);
virObjectUnref(clientCtxt);
virObjectUnref(serverSess);
virObjectUnref(clientSess);
VIR_FORCE_CLOSE(channel[0]);
VIR_FORCE_CLOSE(channel[1]);
return ret;
}
static int
mymain(void)
{
int ret = 0;
g_setenv("GNUTLS_FORCE_FIPS_MODE", "2", TRUE);
testTLSInit(KEYFILE);
# define DO_SESS_TEST(_caCrt, _serverCrt, _clientCrt, _expectServerFail, \
_expectClientFail, _hostname, _wildcards) \
do { \
static struct testTLSSessionData data; \
data.servercacrt = _caCrt; \
data.clientcacrt = _caCrt; \
data.servercrt = _serverCrt; \
data.clientcrt = _clientCrt; \
data.expectServerFail = _expectServerFail; \
data.expectClientFail = _expectClientFail; \
data.hostname = _hostname; \
data.wildcards = _wildcards; \
if (virTestRun("TLS Session " #_serverCrt " + " #_clientCrt, \
testTLSSessionInit, &data) < 0) \
ret = -1; \
} while (0)
# define DO_SESS_TEST_EXT(_serverCaCrt, _clientCaCrt, _serverCrt, _clientCrt, \
_expectServerFail, _expectClientFail, \
_hostname, _wildcards) \
do { \
static struct testTLSSessionData data; \
data.servercacrt = _serverCaCrt; \
data.clientcacrt = _clientCaCrt; \
data.servercrt = _serverCrt; \
data.clientcrt = _clientCrt; \
data.expectServerFail = _expectServerFail; \
data.expectClientFail = _expectClientFail; \
data.hostname = _hostname; \
data.wildcards = _wildcards; \
if (virTestRun("TLS Session " #_serverCrt " + " #_clientCrt, \
testTLSSessionInit, &data) < 0) \
ret = -1; \
} while (0)
VIR_WARNINGS_NO_DECLARATION_AFTER_STATEMENT
# define TLS_CERT_REQ(varname, cavarname, \
co, cn, an1, an2, ia1, ia2, bce, bcc, bci, \
kue, kuc, kuv, kpe, kpc, kpo1, kpo2, so, eo) \
static struct testTLSCertReq varname = { \
NULL, #varname "-sess.pem", \
co, cn, an1, an2, ia1, ia2, bce, bcc, bci, \
kue, kuc, kuv, kpe, kpc, kpo1, kpo2, so, so \
}; \
testTLSGenerateCert(&varname, cavarname.crt)
# define TLS_ROOT_REQ(varname, \
co, cn, an1, an2, ia1, ia2, bce, bcc, bci, \
kue, kuc, kuv, kpe, kpc, kpo1, kpo2, so, eo) \
static struct testTLSCertReq varname = { \
NULL, #varname "-sess.pem", \
co, cn, an1, an2, ia1, ia2, bce, bcc, bci, \
kue, kuc, kuv, kpe, kpc, kpo1, kpo2, so, so \
}; \
testTLSGenerateCert(&varname, NULL)
/* A perfect CA, perfect client & perfect server */
/* Basic:CA:critical */
TLS_ROOT_REQ(cacertreq,
"UK", "libvirt CA", NULL, NULL, NULL, NULL,
true, true, true,
true, true, GNUTLS_KEY_KEY_CERT_SIGN,
false, false, NULL, NULL,
0, 0);
TLS_ROOT_REQ(altcacertreq,
"UK", "libvirt CA 1", NULL, NULL, NULL, NULL,
true, true, true,
false, false, 0,
false, false, NULL, NULL,
0, 0);
TLS_CERT_REQ(servercertreq, cacertreq,
"UK", "libvirt.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", "libvirt", 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);
TLS_CERT_REQ(clientcertaltreq, altcacertreq,
"UK", "libvirt", 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);
DO_SESS_TEST(cacertreq.filename, servercertreq.filename, clientcertreq.filename,
false, false, "libvirt.org", NULL);
DO_SESS_TEST_EXT(cacertreq.filename, altcacertreq.filename, servercertreq.filename,
clientcertaltreq.filename, true, true, "libvirt.org", NULL);
/* When an altname is set, the CN is ignored, so it must be duplicated
* as an altname for it to match */
TLS_CERT_REQ(servercertalt1req, cacertreq,
"UK", "libvirt.org", "www.libvirt.org", "libvirt.org", "192.168.122.1", "fec0::dead:beaf",
true, true, false,
true, true, GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
true, true, GNUTLS_KP_TLS_WWW_SERVER, NULL,
0, 0);
/* This intentionally doesn't replicate */
TLS_CERT_REQ(servercertalt2req, cacertreq,
"UK", "libvirt.org", "www.libvirt.org", "wiki.libvirt.org", "192.168.122.1", "fec0::dead:beaf",
true, true, false,
true, true, GNUTLS_KEY_DIGITAL_SIGNATURE | GNUTLS_KEY_KEY_ENCIPHERMENT,
true, true, GNUTLS_KP_TLS_WWW_SERVER, NULL,
0, 0);
DO_SESS_TEST(cacertreq.filename, servercertalt1req.filename, clientcertreq.filename,
false, false, "libvirt.org", NULL);
DO_SESS_TEST(cacertreq.filename, servercertalt1req.filename, clientcertreq.filename,
false, false, "www.libvirt.org", NULL);
DO_SESS_TEST(cacertreq.filename, servercertalt1req.filename, clientcertreq.filename,
false, true, "wiki.libvirt.org", NULL);
DO_SESS_TEST(cacertreq.filename, servercertalt2req.filename, clientcertreq.filename,
false, true, "libvirt.org", NULL);
DO_SESS_TEST(cacertreq.filename, servercertalt2req.filename, clientcertreq.filename,
false, false, "www.libvirt.org", NULL);
DO_SESS_TEST(cacertreq.filename, servercertalt2req.filename, clientcertreq.filename,
false, false, "wiki.libvirt.org", NULL);
const char *const wildcards1[] = {
"C=UK,CN=dogfood",
NULL,
};
const char *const wildcards2[] = {
"C=UK,CN=libvirt",
NULL,
};
const char *const wildcards3[] = {
"C=UK,CN=dogfood",
"C=UK,CN=libvirt",
NULL,
};
const char *const wildcards4[] = {
"C=UK,CN=libvirtstuff",
NULL,
};
const char *const wildcards5[] = {
"C=UK,CN=libvirt*",
NULL,
};
const char *const wildcards6[] = {
"C=UK,CN=*virt*",
NULL,
};
DO_SESS_TEST(cacertreq.filename, servercertreq.filename, clientcertreq.filename,
true, false, "libvirt.org", wildcards1);
DO_SESS_TEST(cacertreq.filename, servercertreq.filename, clientcertreq.filename,
false, false, "libvirt.org", wildcards2);
DO_SESS_TEST(cacertreq.filename, servercertreq.filename, clientcertreq.filename,
false, false, "libvirt.org", wildcards3);
DO_SESS_TEST(cacertreq.filename, servercertreq.filename, clientcertreq.filename,
true, false, "libvirt.org", wildcards4);
DO_SESS_TEST(cacertreq.filename, servercertreq.filename, clientcertreq.filename,
false, false, "libvirt.org", wildcards5);
DO_SESS_TEST(cacertreq.filename, servercertreq.filename, clientcertreq.filename,
false, false, "libvirt.org", wildcards6);
TLS_ROOT_REQ(cacertrootreq,
"UK", "libvirt root", NULL, NULL, NULL, NULL,
true, true, true,
true, true, GNUTLS_KEY_KEY_CERT_SIGN,
false, false, NULL, NULL,
0, 0);
TLS_CERT_REQ(cacertlevel1areq, cacertrootreq,
"UK", "libvirt level 1a", NULL, NULL, NULL, NULL,
true, true, true,
true, true, GNUTLS_KEY_KEY_CERT_SIGN,
false, false, NULL, NULL,
0, 0);
TLS_CERT_REQ(cacertlevel1breq, cacertrootreq,
"UK", "libvirt level 1b", NULL, NULL, NULL, NULL,
true, true, true,
true, true, GNUTLS_KEY_KEY_CERT_SIGN,
false, false, NULL, NULL,
0, 0);
TLS_CERT_REQ(cacertlevel2areq, cacertlevel1areq,
"UK", "libvirt level 2a", NULL, NULL, NULL, NULL,
true, true, true,
true, true, GNUTLS_KEY_KEY_CERT_SIGN,
false, false, NULL, NULL,
0, 0);
TLS_CERT_REQ(servercertlevel3areq, cacertlevel2areq,
"UK", "libvirt.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(clientcertlevel2breq, cacertlevel1breq,
"UK", "libvirt client level 2b", 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);
gnutls_x509_crt_t certchain[] = {
cacertrootreq.crt,
cacertlevel1areq.crt,
cacertlevel1breq.crt,
cacertlevel2areq.crt,
};
testTLSWriteCertChain("cacertchain-sess.pem",
certchain,
G_N_ELEMENTS(certchain));
DO_SESS_TEST("cacertchain-sess.pem", servercertlevel3areq.filename, clientcertlevel2breq.filename,
false, false, "libvirt.org", NULL);
VIR_WARNINGS_RESET
testTLSDiscardCert(&clientcertreq);
testTLSDiscardCert(&clientcertaltreq);
testTLSDiscardCert(&servercertreq);
testTLSDiscardCert(&servercertalt1req);
testTLSDiscardCert(&servercertalt2req);
testTLSDiscardCert(&cacertreq);
testTLSDiscardCert(&altcacertreq);
testTLSDiscardCert(&cacertrootreq);
testTLSDiscardCert(&cacertlevel1areq);
testTLSDiscardCert(&cacertlevel1breq);
testTLSDiscardCert(&cacertlevel2areq);
testTLSDiscardCert(&servercertlevel3areq);
testTLSDiscardCert(&clientcertlevel2breq);
unlink("cacertchain-sess.pem");
testTLSCleanup(KEYFILE);
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
VIR_TEST_MAIN_PRELOAD(mymain, VIR_TEST_MOCK("virrandom"))
#else
int
main(void)
{
return EXIT_AM_SKIP;
}
#endif
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