Java MD5

 MD5 (Message-Digest algorithm 5) is a widely-used cryptographic hash function with a -bit hash value. Here are some common uses for MD5:

• To store a one-way hash of a password.
• To provide some assurance that a transferred file has arrived intact.

MD5 is one in a series of message digest algorithms designed by Professor Ronald Rivest of MIT (Rivest, ); however, the security of MD5 has been severely compromised, most infamously by the Flame malware in . The CMU Software Engineering Institute essentially considers MD5 to be "cryptographically broken and unsuitable for further use".

Given an alphanumeric string, , denoting a password, compute and print its MD5 encryption value.

Input Format

A single alphanumeric string denoting .

Constraints

• String  consists of English alphabetic letters (i.e.,  and/or decimal digits (i.e.,  through ) only.

Output Format

Print the MD5 encryption value of  on a new line.

Sample Input 0

HelloWorld

Sample Output 0

68e109f0f40ca72a15e05cc22786f8e6

Sample Input 1

Javarmi123

Sample Output 1

2da2d1e0ce7b4951a858ed2d547ef485

SOLUTION:




import java.io.*;

import java.util.*;

import java.text.*;

import java.math.*;

import java.util.regex.*;

import java.math.BigInteger;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

public class Solution {

    

    static String MD5(String message)

    {

        try {

            MessageDigest md = MessageDigest.getInstance("MD5");

            byte[] messageDigest = md.digest(message.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) {

        Scanner scanner=new Scanner(System.in);

        String message = scanner.nextLine();

        scanner.close();

        String encryptedMessage=MD5(message);

        System.out.println(encryptedMessage);

    }

}