private string Encrypt(byte[] data, byte[] password)
{
var rLen = NextBlockMultiple(data.Length + 4);
var keyBuffer = CreateKey(password);
var blockBuffer = BlockPool.Rent(2);
var result = BufferPool.Rent(rLen);
var lengthBuffer = BufferPool.Rent(4);
var bitBuffer = BufferPool.Rent(4);
FastBitConverter.SetUInt32Unsafe(lengthBuffer, (uint)data.Length, 0);
Array.Copy(lengthBuffer, 0, result, 0, 4);
Array.Copy(data, 0, result, 4, data.Length);
using (var stream = new MemoryStream(result))
{
for (int i = 0; i < rLen; i += 8)
{
blockBuffer[0] = FastBitConverter.GetUInt32UnsafeFastest(result, (uint)i);
blockBuffer[1] = FastBitConverter.GetUInt32UnsafeFastest(result, (uint)i + 4);
EncryptBlock(blockBuffer, keyBuffer);
FastBitConverter.SetUInt32Unsafe(bitBuffer, blockBuffer[0], 0);
stream.Write(bitBuffer, 0, 4);
FastBitConverter.SetUInt32Unsafe(bitBuffer, blockBuffer[1], 0);
stream.Write(bitBuffer, 0, 4);
}
}
var str = Convert.ToBase64String(result);
BlockPool.Return(blockBuffer);
BufferPool.Return(result);
BufferPool.Return(lengthBuffer);
BufferPool.Return(bitBuffer);
BlockPool.Return(keyBuffer);
return(str);
}
/// <summary>
/// This function will not throw anything.
/// </summary>
/// <param name="data">The data to decrypt.</param>
/// <param name="key">The key to use.</param>
/// <returns>An array if successful, null if not.</returns>
public byte[] DecryptNonExceptable(byte[] data, byte[] key)
{
if (data.Length % 8 != 0)
{
return(null);
}
var keyBuffer = CreateKey(key);
var blockBuffer = BlockPool.Rent(2);
var buffer = BufferPool.Rent(data.Length);
var bitBuffer = BufferPool.Rent(4);
Array.Copy(data, buffer, data.Length);
using (var stream = new MemoryStream(buffer))
{
for (uint i = 0; i < buffer.Length; i += 8)
{
blockBuffer[0] = FastBitConverter.GetUInt32UnsafeFastest(buffer, i);
blockBuffer[1] = FastBitConverter.GetUInt32UnsafeFastest(buffer, i + 4);
DecryptBlock(blockBuffer, keyBuffer);
FastBitConverter.SetUInt32Unsafe(bitBuffer, blockBuffer[0], 0);
stream.Write(bitBuffer, 0, 4);
FastBitConverter.SetUInt32Unsafe(bitBuffer, blockBuffer[1], 0);
stream.Write(bitBuffer, 0, 4);
}
}
var length = FastBitConverter.GetUInt32UnsafeFastest(buffer, 0);
if (length > buffer.Length - 4)
{
BufferPool.Return(buffer);
BufferPool.Return(bitBuffer);
BlockPool.Return(blockBuffer);
BlockPool.Return(keyBuffer);
return(null);
}
var result = new byte[length];
Array.Copy(buffer, 4, result, 0, length);
BufferPool.Return(buffer);
BufferPool.Return(bitBuffer);
BlockPool.Return(blockBuffer);
BlockPool.Return(keyBuffer);
return(result);
}
