public static Byte[] SymmetricDecrypt(this Byte[] data, String key)
{
//--- Initialize Key ---//
SymmetricEncryptionKey symmetricKey = new SymmetricEncryptionKey(key);
//--- Decrypt ---//
return Decrypt(data, symmetricKey);
}
public static String SymmetricEncrypt(this String data, String key)
{
//--- Initialize Key ---//
SymmetricEncryptionKey symmetricKey = new SymmetricEncryptionKey(key);
//--- Encrypt ---//
Byte[] encryptedDataBytes = Encrypt(data.ToByteArray(Encoding.UTF8), symmetricKey);
//--- Convert Encrypted String as Base64 String ---//
return Convert.ToBase64String(encryptedDataBytes);
}
public static String SymmetricDecrypt(this String data, String key)
{
//--- Initialize Key ---//
SymmetricEncryptionKey symmetricKey = new SymmetricEncryptionKey(key);
//--- Decrypt ---//
Byte[] decryptedBytes = Decrypt(Convert.FromBase64String(data), symmetricKey);
//--- Convert to String ---//
return Encoding.UTF8.GetString(decryptedBytes, 0, decryptedBytes.Length);
}
private static Byte[] Decrypt(Byte[] data, SymmetricEncryptionKey symmetricKey)
{
//--- Initialize Decryptor ---//
RijndaelManaged symmetricDecryptor = new RijndaelManaged();
symmetricDecryptor.Mode = CipherMode.CBC;
//--- Create Decryptor ---//
ICryptoTransform decryptor = symmetricDecryptor.CreateDecryptor(symmetricKey.Key, symmetricKey.InitVector);
//--- Decrypt ---//
MemoryStream ms = new MemoryStream(data);
CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read);
Byte[] tmpDataBytes = new Byte[ms.Length];
Int32 decryptCount = cs.Read(tmpDataBytes, 0, tmpDataBytes.Length);
//--- Extract Decrypted Data ---//
Byte[] decryptedDataBytes = new Byte[decryptCount];
Array.Copy(tmpDataBytes, decryptedDataBytes, decryptCount);
//--- Dispose Resource ---//
ms.Close();
cs.Close();
ms.Dispose();
cs.Dispose();
return decryptedDataBytes;
}
private static Byte[] Encrypt(Byte[] data, SymmetricEncryptionKey symmetricKey)
{
//--- Initialize Encryptor ---//
RijndaelManaged symmetricEncryptor = new RijndaelManaged();
symmetricEncryptor.Mode = CipherMode.CBC;
//--- Create Encryptor ---//
ICryptoTransform encryptor = symmetricEncryptor.CreateEncryptor(symmetricKey.Key, symmetricKey.InitVector);
//--- Encrypt ---//
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write);
cs.Write(data, 0, data.Length);
cs.FlushFinalBlock();
//--- Read Encrypted Bytes ---//
Byte[] encryptedDataBytes = ms.ToArray();
//--- Dispose Resource ---//
ms.Close();
cs.Close();
ms.Dispose();
cs.Dispose();
return encryptedDataBytes;
}
