Java MD5 HackerRank Solution

Problem:-

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.security.MessageDigest;

public class Solution {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

String str = sc.next();

sc.close();

try {

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

md.update(str.getBytes());

// return bytesToHex(md.digest

byte[] digest = md.digest();

for (byte b : digest) {

System.out.printf("%02x", b);

}

} catch (Exception ex) {

throw new RuntimeException(ex);

}

}

}