package org.ssssssss.magicapi.utils;

import org.ssssssss.magicapi.exception.MagicAPIException;

import java.security.MessageDigest;

public class MD5Utils {

    private static final char[] HEX_CHARS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

    /**
     * MD5加密
     */
    public static String encrypt(String value){
        return encrypt(value.getBytes());
    }

    /**
     * MD5加密
     */
    public static String encrypt(byte[] value){
        try {
            byte[] bytes = MessageDigest.getInstance("MD5").digest(value);
            char[] chars = new char[32];
            for (int i = 0; i < chars.length; i = i + 2) {
                byte b = bytes[i / 2];
                chars[i] = HEX_CHARS[(b >>> 0x4) & 0xf];
                chars[i + 1] = HEX_CHARS[b & 0xf];
            }
            return new String(chars);
        } catch (Exception e) {
            throw new MagicAPIException("md5 encrypt error",e);
        }
    }
}