c#開發前端時調用java開發的接口，需要數據加密后通訊。兩邊都需要同時通過DES(BASE64)進行加解密。

代碼如下

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);}

總結

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