EcnryptionImplementation.java

import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class EcnryptionImplementation {
	public String encryptMessage(String message) {
		try {
			return toHexString(getSHA(message));
		} catch (Exception e) {
			return "";
		}

	}

	public static byte[] getSHA(String input) throws NoSuchAlgorithmException {
		// Static getInstance method is called with hashing SHA
		MessageDigest md = MessageDigest.getInstance("SHA-256");

		// digest() method called
		// to calculate message digest of an input
		// and return array of byte
		return md.digest(input.getBytes(StandardCharsets.UTF_8));
	}

	public static String toHexString(byte[] hash) {
		// Convert byte array into signum representation
		BigInteger number = new BigInteger(1, hash);

		// Convert message digest into hex value
		StringBuilder hexString = new StringBuilder(number.toString(16));

		// Pad with leading zeros
		while (hexString.length() < 64) {
			hexString.insert(0, '0');
		}

		return hexString.toString();
	}

	// Driver code
	public static void main(String args[]) {

	}
}