java交互.net的des加密解密方法base64

 转自 http://hi.baidu.com/lang911/blog/item/53898ae984b94132b90e2d04.html

与.net交互，用到了des加密 import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import javax.crypto.spec.IvParameterSpec; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; /* * DES + base64 */ public class Encrypt { public static void main(String args[]) throws Exception{ //System.out.println(EncryptAsDoNet("1100603024816_2010-6-3_12","26451d8f")); System.out.println(DecryptDoNet("tnluSzYe4WhPtYaabWeV8I06GOnANQFq1Mr/z9LIeEo=","26451d8f")); } public static String DecryptDoNet(String message, String key) throws Exception { //base64 + des 解密.net 加密传来串 //byte[] bytesrc = convertHexString(message); //不用base64 的方式 BASE64Decoder base64Decoder = new BASE64Decoder(); byte[] bytesrc=base64Decoder.decodeBuffer(message); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("GB2312")); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey secretKey = keyFactory.generateSecret(desKeySpec); IvParameterSpec iv = new IvParameterSpec(key.getBytes("GB2312")); cipher.init(Cipher.DECRYPT_MODE, secretKey, iv); byte[] retByte = cipher.doFinal(bytesrc); return new String(retByte); } public static String EncryptAsDoNet(String message, String key) throws Exception { //产生与.net 对应的加密des + base64 加密串 //message = java.net.URLEncoder.encode(message, "ascii"); Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding"); DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("GB2312")); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey secretKey = keyFactory.generateSecret(desKeySpec); IvParameterSpec iv = new IvParameterSpec(key.getBytes("GB2312")); cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv); byte[] encryptbyte = cipher.doFinal(message.getBytes()); BASE64Encoder base64Encoder = new BASE64Encoder(); //base64Encoder.encode(encryptbyte); return base64Encoder.encode(encryptbyte); //toHexString(encryptbyte).toUpperCase(); } }