cybervillains.ca.ThumbprintUtil.java Source code

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Here is the source code for cybervillains.ca.ThumbprintUtil.java

Source

package cybervillains.ca;

import org.bouncycastle.crypto.digests.SHA1Digest;
import org.bouncycastle.util.encoders.Base64;

import java.security.cert.CertificateEncodingException;
import java.security.cert.X509Certificate;

/**
 * Generates a persistent SHA1 thumbprint for long-term identification of a certificate.
 * 
 * *************************************************************************************** Copyright
 * (c) 2007, Information Security Partners, LLC All rights reserved.
 * 
 * In a special exception, Selenium/OpenQA is allowed to use this code under the Apache License 2.0.
 * 
 * 
 * @author Brad Hill
 * 
 */
public class ThumbprintUtil {

    /**
     * Generates a SHA1 thumbprint of a certificate for long-term mapping.
     * 
     * @param cert
     * @return
     * @throws CertificateEncodingException
     */
    public static String getThumbprint(final X509Certificate cert) throws CertificateEncodingException {

        if (cert == null) {
            return null;
        }

        byte[] rawOctets = cert.getEncoded();

        SHA1Digest digest = new SHA1Digest();

        byte[] digestOctets = new byte[digest.getDigestSize()];

        digest.update(rawOctets, 0, rawOctets.length);

        digest.doFinal(digestOctets, 0);

        return new String(Base64.encode(digestOctets));
    }

}