HashAlgorithm.java

package end_sem3;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
  
public class HashAlgorithm {
    public static String generateHash(Block message)
    {
        try {
            // getInstance() method is called with algorithm SHA-224
            MessageDigest md = MessageDigest.getInstance("SHA-256");
  
            // digest() method is called
            // to calculate message digest of the input string
            // returned as array of byte
            byte[] messageDigest = md.digest(message.getBytes());
  
            // Convert byte array into signum representation
            BigInteger no = new BigInteger(1, messageDigest);
  
            // Convert message digest into hex value
            String hashtext = no.toString(16);
  
            // Add preceding 0s to make it 32 bit
            while (hashtext.length() < 32) {
                hashtext = "0" + hashtext;
            }
  
            // return the HashText
            return hashtext;
        }
  
        // For specifying wrong message digest algorithms
        catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }

	public static String generateHash1(String string) {
		try {
            // getInstance() method is called with algorithm SHA-224
            MessageDigest md = MessageDigest.getInstance("SHA-256");
  
            // digest() method is called
            // to calculate message digest of the input string
            // returned as array of byte
            byte[] messageDigest = md.digest(string.getBytes());
  
            // Convert byte array into signum representation
            BigInteger no = new BigInteger(1, messageDigest);
  
            // Convert message digest into hex value
            String hashtext = no.toString(16);
  
            // Add preceding 0s to make it 32 bit
            while (hashtext.length() < 32) {
                hashtext = "0" + hashtext;
            }
  
            // return the HashText
            return hashtext;
        }
		catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
	}
}