private void Encrypt(byte b)
{
//Mix the with arbitrary bytes
_realBytePosition = _fastRandom.GetInt(0, SaltSize);
var arbitraryBytes = _fastRandom.GetBytes(SaltSize);
RuntimeHelper.ExecuteCodeWithGuaranteedCleanup(
//Action
() =>
{
arbitraryBytes[_realBytePosition] = b;
//Get key
_encryptionKey = _fastRandom.GetBytes(KeySize);
//Encrypt
var encryptedBuffer = _encryptor.Encrypt(arbitraryBytes, _encryptionKey);
RuntimeHelper.ExecuteCodeWithGuaranteedCleanup(
//Action
() =>
{
//Add arbitrary bytes
_encryptedByteLength = encryptedBuffer.Length;
_encryptedByte = GetMemoryProtectableSizedBytes(encryptedBuffer);
},
//Cleanup
() =>
{
if (encryptedBuffer != null)
{
Array.Clear(encryptedBuffer, 0, encryptedBuffer.Length);
}
});
},
//Cleanup
() =>
{
Array.Clear(arbitraryBytes, 0, arbitraryBytes.Length);
});
}
internal EncryptedSafeByteCollection(IFastEncryptor encryptor, IByteArrayProtector memoryProtector,
IFastRandom fastRandom, ISafeByteFactory safeByteFactory)
{
if (encryptor == null)
{
throw new ArgumentNullException(nameof(encryptor));
}
if (memoryProtector == null)
{
throw new ArgumentNullException(nameof(memoryProtector));
}
if (safeByteFactory == null)
{
throw new ArgumentNullException(nameof(safeByteFactory));
}
_encryptor = encryptor;
_memoryProtector = memoryProtector;
_safeByteFactory = safeByteFactory;
_encryptionKey = fastRandom.GetBytes(_memoryProtector.BlockSizeInBytes);
_memoryProtector.Protect(_encryptionKey);
}
/// <summary>
/// Creates and sets a random initialization vector.
/// </summary>
/// <returns>The random IV</returns>
public byte[] SetRandomIV()
{
InitVector = _random.GetBytes(8);
IVSet = true;
return(InitVector);
}