bs/framework/com/behosoft/util/DESEncrypt.java

package com.behosoft.util;

import java.net.URLDecoder;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;

import com.behosoft.framework.web.exception.CommonException;


public class DESEncrypt {

	public static String decrypt(String message) {
		try {
			byte bkey[] = new byte[8];
			bkey[0] = 56;
			bkey[1] = 48;
			bkey[2] = 52;
			bkey[3] = 66;
			bkey[4] = 68;
			bkey[5] = 57;
			bkey[6] = 68;
			bkey[7] = 52;
			byte bytesrc[] = convertHexString(message);
			Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
			DESKeySpec desKeySpec = new DESKeySpec(bkey);
			SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
			javax.crypto.SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
			IvParameterSpec iv = new IvParameterSpec(bkey);
			cipher.init(2, secretKey, iv);
			byte retByte[] = cipher.doFinal(bytesrc);
			String sde = new String(retByte);
			return URLDecoder.decode(sde, "gb2312");
		}
		catch (Exception e) {
			throw new CommonException(e.getMessage(), e);
		}
	}

	public static String encrypt(String message) {
		try {
			Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
			byte bkey[] = new byte[8];
			bkey[0] = 56;
			bkey[1] = 48;
			bkey[2] = 52;
			bkey[3] = 66;
			bkey[4] = 68;
			bkey[5] = 57;
			bkey[6] = 68;
			bkey[7] = 52;
			DESKeySpec desKeySpec = new DESKeySpec(bkey);
			SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
			javax.crypto.SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
			IvParameterSpec iv = new IvParameterSpec(bkey);
			cipher.init(1, secretKey, iv);
			byte ben[] = cipher.doFinal(message.getBytes("gb2312"));
			return toHexString(ben).toUpperCase();
		}
		catch (Exception e) {
			throw new CommonException(e.getMessage(), e);
		}

	}

	private static byte[] convertHexString(String ss) {
		byte digest[] = new byte[ss.length() / 2];
		for (int i = 0; i < digest.length; i++) {
			String byteString = ss.substring(2 * i, 2 * i + 2);
			int byteValue = Integer.parseInt(byteString, 16);
			digest[i] = (byte) byteValue;
		}

		return digest;
	}

	private static String toHexString(byte b[]) {
		StringBuffer hexString = new StringBuffer();
		for (int i = 0; i < b.length; i++) {
			String plainText = Integer.toHexString(0xff & b[i]);
			if (plainText.length() < 2)
				plainText = (new StringBuilder("0")).append(plainText).toString();
			hexString.append(plainText);
		}

		return hexString.toString();
	}

	public static void main(String... strings) throws Exception {
		// System.out.println("DESEncrypt.main()： " + encrypt("沪B35063").equals("A93D8E2F0BDB99DE8741267D1D31469E"));
	}
}