/// <summary>
/// Decrypts and returns the byte that this <see cref="SafeByte" /> instance represents.
/// </summary>
/// <returns></returns>
/// <exception cref="System.InvalidOperationException">Thrown when byte is not set</exception>
public byte Get()
{
EnsureByteIsSet();
byte[] byteBuffer = null;
try
{
_memoryProtector.Unprotect(_encryptionKey);
_memoryProtector.Unprotect(_encryptedByte);
var encryptedBuffer = new byte[_encryptedByteLength];
try
{
Buffer.BlockCopy(_encryptedByte, 0, encryptedBuffer, 0, _encryptedByteLength);
byteBuffer = _encryptor.Decrypt(encryptedBuffer, _encryptionKey);
//Extract the byte from arbitrary bytes
return(byteBuffer[_realBytePosition]);
}
finally
{
Array.Clear(encryptedBuffer, 0, _encryptedByteLength);
}
}
finally
{
if (byteBuffer != null)
{
Array.Clear(byteBuffer, 0, byteBuffer.Length);
}
_memoryProtector.Protect(_encryptionKey);
_memoryProtector.Protect(_encryptedByte);
}
}
public void Unprotect(byte[] encryptedData)
{
if (encryptedData == null)
{
throw new ArgumentNullException(nameof(encryptedData));
}
var decryptedBytes = _encryptor.Decrypt(encryptedData, _key);
SetBytesToByteArray(
source: decryptedBytes,
target: ref encryptedData);
}
private ICollection <int> DecryptAndDeserialize(byte[] encryptedCollection, byte[] encryptionKey)
{
if (encryptedCollection == null)
{
return(new List <int>());
}
var decryptedBytes = _encryptor.Decrypt(encryptedCollection, encryptionKey);
try
{
var deserializedBytes = Deserialize(decryptedBytes);
return(deserializedBytes.ToList());
}
finally
{
Array.Clear(decryptedBytes, 0, decryptedBytes.Length);
}
}
