java des加密解密_JAVA和c# 之间数据通讯时通过DES进行加密解密

c#开发前端时调用java开发的接口，需要数据加密后通讯。两边都需要同时通过DES(BASE64)进行加解密。

代码如下

c#端：

加密

public static String Encrypt(String toEncrypt, String key)        {           Byte[] _Key = Encoding.ASCII.GetBytes(key);           Byte[] _Source = Encoding.UTF8.GetBytes(toEncrypt);            DES des = DES.Create("DES");           des.Mode = CipherMode.ECB;           des.Padding = PaddingMode.PKCS7;           des.Key = _Key;           ICryptoTransform cTransform = des.CreateEncryptor();           Byte[] cryptData = cTransform.TransformFinalBlock(_Source, 0, _Source.Length);            String CryptString = Convert.ToBase64String(cryptData);           return CryptString; }

解密

public static String Decrypt(string encryptedSource, string key)       {           Byte[] _Key = Encoding.ASCII.GetBytes(key);           DES des = DES.Create("DES");           des.Mode = CipherMode.ECB;           des.Padding = PaddingMode.PKCS7;           des.Key = _Key;           ICryptoTransform cTransform = des.CreateDecryptor();           Byte[] encryptedData = Convert.FromBase64String(encryptedSource);           Byte[] originalSrouceData = cTransform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);           String originalString = Encoding.UTF8.GetString(originalSrouceData);           return originalString;       }

Java端：

加密

public static String encrypt(String data,String key) throws Exception { byte[] bt = encrypt(data.getBytes(), key.getBytes()); String strs = (new BASE64Encoder()).encode(bt); return strs;}private static byte[] encrypt(byte[] data, byte[] key) throws Exception { SecureRandom sr = new SecureRandom(); DESKeySpec dks = new DESKeySpec(key); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey securekey = keyFactory.generateSecret(dks); Cipher cipher = Cipher.getInstance("DES"); cipher.init(1, securekey, sr); return cipher.doFinal(data);}

解密：

public static String decrypt(String data,String key) throws IOException, Exception { if (data == null) { return null; } else { BASE64Decoder decoder = new BASE64Decoder(); byte[] buf = decoder.decodeBuffer(data); byte[] bt = decrypt(buf, key.getBytes()); return new String(bt); }}private static byte[] decrypt(byte[] data, byte[] key) throws Exception { SecureRandom sr = new SecureRandom(); DESKeySpec dks = new DESKeySpec(key); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey securekey = keyFactory.generateSecret(dks); Cipher cipher = Cipher.getInstance("DES"); cipher.init(2, securekey, sr); return cipher.doFinal(data);}

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