SHA1LIB.java

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.*;

public class SHA1LIB {
    public static String encryptThisString(String input) {
        try {
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            byte[] messageDigest = md.digest(input.getBytes());
            BigInteger no = new BigInteger(1, messageDigest);
            String hashtext = no.toString(16);
            while (hashtext.length() < 32) {
                hashtext = "0" + hashtext;
            }
            return hashtext;
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }

    public static void main(String args[]) throws NoSuchAlgorithmException {

        System.out.println("----SHA-1----");
        System.out.println("Insert a word a phrase to be hashed");
        Scanner sc = new Scanner(System.in);
        String word = sc.nextLine();
        System.out.println("Plain Text: " + word);
        System.out.println("Encrypted Text: " + encryptThisString(word));

    }
}