throws IOException {
if(host == null) {
throw new NullPointerException("host to verify is null");
}
SSLSession session = ssl.getSession();
if(session == null) {
// In our experience this only happens under IBM 1.4.x when
// spurious (unrelated) certificates show up in the server'
// chain. Hopefully this will unearth the real problem:
InputStream in = ssl.getInputStream();
in.available();
/*
If you're looking at the 2 lines of code above because
you're running into a problem, you probably have two
options:
#1. Clean up the certificate chain that your server
is presenting (e.g. edit "/etc/apache2/server.crt"
or wherever it is your server's certificate chain
is defined).
OR
#2. Upgrade to an IBM 1.5.x or greater JVM, or switch
to a non-IBM JVM.
*/
// If ssl.getInputStream().available() didn't cause an
// exception, maybe at least now the session is available?
session = ssl.getSession();
if(session == null) {
// If it's still null, probably a startHandshake() will
// unearth the real problem.
ssl.startHandshake();
// Okay, if we still haven't managed to cause an exception,
// might as well go for the NPE. Or maybe we're okay now?
session = ssl.getSession();
}
}
Certificate[] certs = session.getPeerCertificates();
X509Certificate x509 = (X509Certificate) certs[0];
verify(host, x509);
}