Finding Hash of the message using HmacSHA1 algorithm

الكود مكتوب بلغه الجافا

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import javax.crypto.Mac;

import javax.crypto.spec.SecretKeySpec;

import java.util.Random ;

import javax.swing.*;

import java.security.InvalidKeyException;

import java.security.NoSuchAlgorithmException;

import java.security.SignatureException;

import java.util.Formatter;

class FindHash {

private static final String HMAC_SHA1_ALGORITHM = "HmacSHA1";

public FindHash() {

try {

String inputMessage=JOptionPane.showInputDialog(null,"Enter message to hash");

String hmac_message = calculateRFC2104HMAC(inputMessage, "key1");

JOptionPane.showMessageDialog(null,"Hash of the message: "+hmac_message);

}

catch(Exception e) {

System.out.println(e);

}

}

//************* Coding for Hashing *******************

private static String toHexString(byte[] bytes)

{

Formatter formatter = new Formatter();

for (byte b : bytes)

{

formatter.format("%02x", b);

}

return formatter.toString();

}

public static String calculateRFC2104HMAC(String data, String key) throws SignatureException, NoSuchAlgorithmException, InvalidKeyException

{

SecretKeySpec signingKey = new SecretKeySpec(key.getBytes(), HMAC_SHA1_ALGORITHM);

Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);

mac.init(signingKey);

return toHexString(mac.doFinal(data.getBytes()));

}

public static void main(String args[]) {

FindHash fh = new FindHash();

}

}

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