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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * 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.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * and therefore, elected the GPL Version 2 license, then the option applies
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 */
//Portions Copyright [2018] [Payara Foundation]

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 StringBuilder	buf	= new StringBuilder();
		final String		NL	= "\n";

		buf.append("Issuer: ").append(cert.getIssuerDN().getName()).append(NL);
		buf.append("Issued to: ").append(cert.getSubjectDN().getName()).append(NL);
		buf.append("Version: ").append(cert.getVersion()).append(NL);
		buf.append("Not valid before: ").append(cert.getNotBefore()).append(NL);
		buf.append("Not valid after: ").append(cert.getNotAfter()).append(NL);
		buf.append("Serial number: ").append(cert.getSerialNumber()).append(NL);
		buf.append("Signature algorithm: ").append(cert.getSigAlgName()).append(NL);
		buf.append("Signature algorithm OID: ").append(cert.getSigAlgOID()).append(NL);

		buf.append( "Signature fingerprint (MD5): " );
		byte[]	fingerprint	= getFingerprint( cert.getSignature(), "MD5" );
		buf.append(StringUtil.toHexString(fingerprint, ":")).append(NL);

		buf.append( "Signature fingerprint (SHA1): " );
		fingerprint	= getFingerprint( cert.getSignature(), "SHA1" );
		buf.append(StringUtil.toHexString(fingerprint, ":")).append(NL);

		return( buf.toString() );
	}

		public String
	stringify( Object object )
	{
		return( stringify( (X509Certificate)object ) );
	}
}