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/*
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 *
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 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
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 *
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package org.glassfish.admin.amx.util.stringifier;

import org.glassfish.admin.amx.util.StringUtil;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.cert.X509Certificate;


/**
	Stringifies an X509CertificateStringifier.
 */
 
public final class X509CertificateStringifier implements Stringifier
{
	public final static X509CertificateStringifier	DEFAULT	= new X509CertificateStringifier();
	
		public
	X509CertificateStringifier()
	{
	}
	
	
		private static byte[]
	getFingerprint( byte[] signature, String alg )
	{
		byte[]	result	= null;
		
		try
		{
			final MessageDigest md = MessageDigest.getInstance( alg );
			
			result	= md.digest( signature );
		}
		catch ( NoSuchAlgorithmException e )
		{
			result	= signature;
			e.printStackTrace();
		}
		
		return( result );
	}
	
	/**
		Static variant when direct call will suffice.
	 */
		public static String
	stringify( final X509Certificate cert )
	{
		final StringBuffer	buf	= new StringBuffer();
		final String		NL	= "\n";
		
		buf.append( "Issuer: " + cert.getIssuerDN().getName() + NL);
		buf.append( "Issued to: " + cert.getSubjectDN().getName()  + NL);
		buf.append( "Version: " + cert.getVersion()  + NL);
		buf.append( "Not valid before: " + cert.getNotBefore()  + NL);
		buf.append( "Not valid after: " + cert.getNotAfter()  + NL);
		buf.append( "Serial number: " + cert.getSerialNumber()  + NL);	
		buf.append( "Signature algorithm: " + cert.getSigAlgName()  + NL);	
		buf.append( "Signature algorithm OID: " + cert.getSigAlgOID()  + NL);
		
		buf.append( "Signature fingerprint (MD5): " );
		byte[]	fingerprint	= getFingerprint( cert.getSignature(), "MD5" );
		buf.append( StringUtil.toHexString( fingerprint, ":" ) + NL );
		
		buf.append( "Signature fingerprint (SHA1): " );
		fingerprint	= getFingerprint( cert.getSignature(), "SHA1" );
		buf.append( StringUtil.toHexString( fingerprint, ":" )  + NL );
		
		return( buf.toString() );
	}
	
		public String
	stringify( Object object )
	{
		return( stringify( (X509Certificate)object ) );
	}
}