public byte[] Decrypt(byte[] input)
{
byte[] output = new byte[input.Length];
byte[] key = (byte[])(NormalKeys[Slot].Clone());
byte[] ctr_iv_nonce = new byte[0x10];
CTR_IV_NONCE.CopyTo(ctr_iv_nonce, 0);
switch (Mode)
{
case AesMode.NotSupported:
throw new NotSupportedException();
case AesMode.CBC:
using (var _aes = CreateAes(key, ctr_iv_nonce, CipherMode.CBC, PaddingMode.None))
{
_aes.CreateDecryptor(_aes.Key, _aes.IV).TransformBlock(input, 0, input.Length, output, 0);
}
break;
case AesMode.CTR:
using (var _aes = new AesCtr(ctr_iv_nonce))
{
_aes.CreateDecryptor(key).TransformBlock(input, 0, input.Length, output, 0);
}
break;
case AesMode.ECB:
using (var _aes = CreateAes(key, ctr_iv_nonce, CipherMode.ECB, PaddingMode.None))
{
_aes.CreateDecryptor(_aes.Key, _aes.IV).TransformBlock(input, 0, input.Length, output, 0);
}
break;
}
return(output);
}
public void Decrypt(Stream inStream, Stream outStream, long count)
{
byte[] key = (byte[])(NormalKeys[Slot].Clone());
byte[] ctr_iv_nonce = new byte[0x10];
CTR_IV_NONCE.CopyTo(ctr_iv_nonce, 0);
switch (Mode)
{
case AesMode.NotSupported:
throw new NotSupportedException();
case AesMode.CBC:
using (var _aes = CreateAes(key, ctr_iv_nonce, CipherMode.CBC, PaddingMode.None))
{
using (var decryptor = _aes.CreateDecryptor(_aes.Key, _aes.IV))
{
byte[] inBuf;
byte[] outBuf;
while (count > 0)
{
inBuf = new byte[count > 0x100000 ? 0x100000 : count];
outBuf = new byte[count > 0x100000 ? 0x100000 : count];
inStream.Read(inBuf, 0, inBuf.Length);
decryptor.TransformBlock(inBuf, 0, inBuf.Length, outBuf, 0);
outStream.Write(outBuf, 0, outBuf.Length);
count -= inBuf.Length;
}
}
}
break;
case AesMode.CTR:
using (var _aes = new AesCtr(ctr_iv_nonce))
{
using (var decryptor = _aes.CreateDecryptor(key))
{
byte[] inBuf;
byte[] outBuf;
while (count > 0)
{
inBuf = new byte[count > 0x100000 ? 0x100000 : count];
outBuf = new byte[count > 0x100000 ? 0x100000 : count];
inStream.Read(inBuf, 0, inBuf.Length);
decryptor.TransformBlock(inBuf, 0, inBuf.Length, outBuf, 0);
outStream.Write(outBuf, 0, outBuf.Length);
count -= inBuf.Length;
}
}
}
break;
case AesMode.ECB:
using (var _aes = CreateAes(key, ctr_iv_nonce, CipherMode.ECB, PaddingMode.None))
{
using (var decryptor = _aes.CreateDecryptor(key, _aes.IV))
{
byte[] inBuf;
byte[] outBuf;
while (count > 0)
{
inBuf = new byte[count > 0x100000 ? 0x100000 : count];
outBuf = new byte[count > 0x100000 ? 0x100000 : count];
inStream.Read(inBuf, 0, inBuf.Length);
decryptor.TransformBlock(inBuf, 0, inBuf.Length, outBuf, 0);
outStream.Write(outBuf, 0, outBuf.Length);
count -= inBuf.Length;
}
}
}
break;
}
}
