Re: Trust CA cert without modifying keystore

From:
Ian Pilcher <arequipeno@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Mon, 22 Jun 2009 14:11:13 -0500
Message-ID:
<mHQ%l.2857$Zc7.1129@newsfe22.iad>
Ian Pilcher wrote:

All of the example I can find involve using the keytool command to make
the CA certificate generally trusted by the system. I would much prefer
to simply embed the CA certificate in the application (as a String?) and
somehow create an SSL connection which trusts only this CA certificate.


OK, I figured it out. Here it is for posterity:

import java.security.cert.X509Certificate;
import java.security.cert.CertificateFactory;
import java.security.KeyStore;
import java.io.InputStream;
import java.io.FileImportStream;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.SSLSocket;

class MySSL
{
    private static final String host = "my.host.name";
    private static final int port = 443;

    public static void main(String[] args) throws Exception
    {
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        InputStream in = new FileInputStream("/my/CA/certificate.pem");
        X509Certificate cert =
                (X509Certificate)cf.generateCertificate(in);
        in.close();
        KeyStore ks = KeyStore.getInstance("jks");
        ks.load(null, null);
        ks.setCertificateEntry("My Certificate Authority", cert);
        TrustManagerFactory tmf =
                TrustManagerFactory.getInstance("PKIX");
        tmf.init(ks);
        SSLContext context = SSLContext.getInstance("SSL");
        context.init(null, tmf.getTrustManagers(), null);
        SSLSocketFactory sf = context.getSocketFactory();
        SSLSocket = (SSLSocket)sf.createSocket(host, port);
        socket.startHandshake();
    }
}

--
========================================================================
Ian Pilcher arequipeno@gmail.com
========================================================================

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