package com.matrix.core.tools;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Formatter;

/**
 * 加密工具
 * 
 * @author JIANGYOUYAO
 * @email 935090232@qq.com
 * @date 2017年11月29日
 */
public class EncrypUtil {
	/**
	 * 字符串MD5加密
	 * 
	 * @author JIANGYOUYAO
	 * @email 935090232@qq.com
	 * @date 2017年12月5日
	 * @param sourceStr
	 * @return
	 * @throws UnsupportedEncodingException
	 * @throws NoSuchAlgorithmException 
	 */
	public static String getMD5(String sourceStr) throws UnsupportedEncodingException, NoSuchAlgorithmException {

		String resultStr = "";
			byte[] temp = sourceStr.getBytes();
			MessageDigest md5 = MessageDigest.getInstance("MD5");
			md5.update(temp);
			byte[] b = md5.digest();
			for (int i = 0; i < b.length; i++) {
				char[] digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
				char[] ob = new char[2];
				ob[0] = digit[(b[i] >>> 4) & 0X0F];
				ob[1] = digit[b[i] & 0X0F];
				resultStr += new String(ob);
			}
			return resultStr;
	}

	/**
	 * 返回SHA-1加密后的字符串
	 * 
	 * @author JIANGYOUYAO
	 * @email 935090232@qq.com
	 * @date 2017年12月5日
	 * @param sourceStr
	 * @return
	 * @throws UnsupportedEncodingException
	 * @throws NoSuchAlgorithmException
	 */
	public static String getSha1(String sourceStr) throws UnsupportedEncodingException, NoSuchAlgorithmException {
		MessageDigest crypt = MessageDigest.getInstance("SHA-1");
		crypt.reset();
		crypt.update(sourceStr.getBytes("UTF-8"));
		sourceStr = byteToHex(crypt.digest());
		return sourceStr;
	}

	private static String byteToHex(final byte[] hash) {
		Formatter formatter = new Formatter();
		for (byte b : hash) {
			formatter.format("%02x", b);
		}
		String result = formatter.toString();
		formatter.close();
		return result;
	}

	 
}