package org.jcryptool.visual.sig.algorithm;

import java.security.*;
//import javax.crypto.*;

import org.jcryptool.core.logging.utils.LogUtil;
import org.jcryptool.visual.sig.SigPlugin;

/**
 * Hashes the given input with one of the selected hash methods.
 * @author Grebe
 *
 */
public class Hash {
	public static String hash;

	/**
	 * This method hashes an input stored in Input.java with a given hash method
	 * @throws Exception
	 * @param hashmethod The name of the method (a string)
	 */
	public static byte[] hashInput (String hashmethod, byte[] input) throws Exception {
		byte[] md = null;
		try {
			//Get an MD5 message digest object and compute the plaintext digest
		    MessageDigest messageDigest = MessageDigest.getInstance(hashmethod); //Argument is a string!
		    messageDigest.update(input);
		    //Output:
		    md = messageDigest.digest();
		    //hash = new String (org.jcryptool.visual.sig.algorithm.Input.bytesToHex(md)); //Hex String
		    
		    org.jcryptool.visual.sig.algorithm.Input.hash = md; //Store the generated hash
		    org.jcryptool.visual.sig.algorithm.Input.hashHex = org.jcryptool.visual.sig.algorithm.Input.bytesToHex(md); //Hex String
		    return md;
		} catch (Exception ex) {
			LogUtil.logError(SigPlugin.PLUGIN_ID, ex);
		} 
		return md;
	}

}

package org.jcryptool.visual.sig.algorithm;

import java.security.*;
//import javax.crypto.*;

import org.jcryptool.core.logging.utils.LogUtil;
import org.jcryptool.visual.sig.SigPlugin;

/**
 * Hashes the given input with one of the selected hash methods.
 * @author Grebe
 *
 */
public class Hash {
	public static String hash;

	/**
	 * This method hashes an input stored in Input.java with a given hash method
	 * @throws Exception
	 * @param hashmethod The name of the method (a string)
	 */
	public static byte[] hashInput (String hashmethod, byte[] input) throws Exception {
		byte[] md = null;
		try {
			//Get an MD5 message digest object and compute the plaintext digest
		    MessageDigest messageDigest = MessageDigest.getInstance(hashmethod); //Argument is a string!
		    messageDigest.update(input);
		    //Output:
		    md = messageDigest.digest();
		    //hash = new String (org.jcryptool.visual.sig.algorithm.Input.bytesToHex(md)); //Hex String
		    
		    org.jcryptool.visual.sig.algorithm.Input.chosenHash = hashmethod;
		    org.jcryptool.visual.sig.algorithm.Input.hash = md; //Store the generated hash
		    org.jcryptool.visual.sig.algorithm.Input.hashHex = org.jcryptool.visual.sig.algorithm.Input.bytesToHex(md); //Hex String
		    return md;
		} catch (Exception ex) {
			LogUtil.logError(SigPlugin.PLUGIN_ID, ex);
		} 
		return md;
	}

}

Set chosenHash