io.lsn.java.common.hash.Hash Maven / Gradle / Ivy

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package io.lsn.java.common.hash;

import org.apache.log4j.Logger;

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

public class Hash {

    private static final Logger logger = Logger.getLogger(Hash.class);

    public static String md5(String input) {
        return hash(input, "MD5");
    }

    public static String sha256(String input) {
        return hash(input, "SHA-256");
    }

    private static String hash(String input, String algorithm) {
        MessageDigest digest = null;
        if (null == input) {
            return null;
        }
        try {
            digest = MessageDigest.getInstance(algorithm);
            digest.update(input.getBytes(), 0, input.length());
        } catch (NoSuchAlgorithmException e) {
            logger.error(e.getMessage(), e);
        }
        assert digest != null;
        return new BigInteger(1, digest.digest()).toString(16);
    }
}