com.github.levkoposc.SecurityTools Maven / Gradle / Ivy

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JTools is simple tools for Java

There is a newer version: 0.3.1.2

package com.github.levkoposc;

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

public final class SecurityTools{

    public String md5(String st) {
        MessageDigest messageDigest;
        byte[] digest = new byte[0];

        try {
            messageDigest = MessageDigest.getInstance("MD5");
            messageDigest.reset();
            messageDigest.update(st.getBytes());
            digest = messageDigest.digest();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        BigInteger bigInt = new BigInteger(1, digest);
        StringBuilder md5Hex = new StringBuilder(bigInt.toString(16));

        while(md5Hex.length()<32)
            md5Hex.insert(0, "0");

        return md5Hex.toString();
    }
}