/// <summary>
/// Encrypt byte array
/// </summary>
/// <param name="value">Value to encrypt</param>
/// <param name="key">Cryptographic key</param>
/// <returns>Byte array containing Initialization Vector and encrypted value</returns>
public byte[] EncryptBytes(byte[] value, byte[] key)
{
var algorithm = SymmetricAlgorithm.Create(typeof(TAlgorithm).Name);
if (!algorithm.ValidKeySize(key.Length * 8))
{
throw new ArgumentException("Invalid key size for specified symmetric algorithm [" + typeof(TAlgorithm).Name + "].");
}
algorithm.GenerateIV();
algorithm.Key = key;
using (var encryptor = algorithm.CreateEncryptor())
{
using (var msEncrypt = new MemoryStream())
{
using (var encryptStream = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (var plainStream = new MemoryStream(value))
{
plainStream.CopyTo(encryptStream);
encryptStream.FlushFinalBlock();
var encrypted = CryptographicValue <TAlgorithm> .Create(algorithm.IV, msEncrypt.ToArray());
algorithm.Clear();
return(encrypted.GetBinaryValue());
}
}
}
}
}
/// <summary>
/// Decrypt byte array
/// </summary>
/// <param name="value">Value to encrypt</param>
/// <param name="key">Encryption key</param>
/// <returns><code>byte[]</code> containing decrypted data</returns>
public byte[] DecryptBytes(byte[] value, byte[] key)
{
var algorithm = SymmetricAlgorithm.Create(typeof(TAlgorithm).Name);
if (!algorithm.ValidKeySize(key.Length * 8))
{
throw new ArgumentException("Invalid key size for specified symmetric algorithm [" + typeof(TAlgorithm).Name + "].");
}
var cryptoValue = CryptographicValue <TAlgorithm> .Create(value);
using (var decryptor = algorithm.CreateDecryptor(key, cryptoValue.Iv))
{
using (var msDecrypt = new MemoryStream(cryptoValue.Value))
{
using (var decryptStream = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (var resultStream = new MemoryStream())
{
decryptStream.CopyTo(resultStream);
algorithm.Clear();
return(resultStream.ToArray());
}
}
}
}
}
