/*
* This tests sanity checking of our own certificates
*
* This code is done when libvirtd starts up, or before
* a libvirt client connects. The test is ensuring that
* the creation of virNetTLSContextPtr fails if we
* give bogus certs, or succeeds for good certs
*/
static int testTLSContextInit(const void *opaque)
{
struct testTLSContextData *data = (struct testTLSContextData *)opaque;
virNetTLSContextPtr ctxt = NULL;
int ret = -1;
if (data->isServer) {
ctxt = virNetTLSContextNewServer(data->cacrt,
NULL,
data->crt,
KEYFILE,
NULL,
"NORMAL",
true,
true);
} else {
ctxt = virNetTLSContextNewClient(data->cacrt,
NULL,
data->crt,
KEYFILE,
"NORMAL",
true,
true);
}
if (ctxt) {
if (data->expectFail) {
VIR_WARN("Expected failure %s against %s",
data->cacrt, data->crt);
goto cleanup;
}
} else {
if (!data->expectFail) {
VIR_WARN("Unexpected failure %s against %s",
data->cacrt, data->crt);
goto cleanup;
}
VIR_DEBUG("Got error %s", virGetLastErrorMessage());
}
ret = 0;
cleanup:
virObjectUnref(ctxt);
return ret;
}
/*
* 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 int testTLSSessionInit(const void *opaque)
{
struct testTLSSessionData *data = (struct testTLSSessionData *)opaque;
virNetTLSContextPtr clientCtxt = NULL;
virNetTLSContextPtr serverCtxt = NULL;
virNetTLSSessionPtr clientSess = NULL;
virNetTLSSessionPtr 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,
NULL,
false,
true);
clientCtxt = virNetTLSContextNewClient(data->clientcacrt,
NULL,
data->clientcrt,
KEYFILE,
NULL,
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;
}