private static uint Inv_Mcol(uint x)
{
uint num = AesLightEngine.FFmulX(x);
uint num2 = AesLightEngine.FFmulX(num);
uint num3 = AesLightEngine.FFmulX(num2);
uint num4 = x ^ num3;
return(num ^ num2 ^ num3 ^ AesLightEngine.Shift(num ^ num4, 8) ^ AesLightEngine.Shift(num2 ^ num4, 16) ^ AesLightEngine.Shift(num4, 24));
}
private uint[][] GenerateWorkingKey(byte[] key, bool forEncryption)
{
int num = key.Length / 4;
if (num != 4 && num != 6 && num != 8)
{
throw new ArgumentException("Key length not 128/192/256 bits.");
}
this.ROUNDS = num + 6;
uint[][] array = new uint[this.ROUNDS + 1][];
for (int i = 0; i <= this.ROUNDS; i++)
{
array[i] = new uint[4];
}
int num2 = 0;
int j = 0;
while (j < key.Length)
{
array[num2 >> 2][num2 & 3] = Pack.LE_To_UInt32(key, j);
j += 4;
num2++;
}
int num3 = this.ROUNDS + 1 << 2;
for (int k = num; k < num3; k++)
{
uint num4 = array[k - 1 >> 2][k - 1 & 3];
if (k % num == 0)
{
num4 = (AesLightEngine.SubWord(AesLightEngine.Shift(num4, 8)) ^ (uint)AesLightEngine.rcon[k / num - 1]);
}
else if (num > 6 && k % num == 4)
{
num4 = AesLightEngine.SubWord(num4);
}
array[k >> 2][k & 3] = (array[k - num >> 2][k - num & 3] ^ num4);
}
if (!forEncryption)
{
for (int l = 1; l < this.ROUNDS; l++)
{
uint[] array2 = array[l];
for (int m = 0; m < 4; m++)
{
array2[m] = AesLightEngine.Inv_Mcol(array2[m]);
}
}
}
return(array);
}
private void DecryptBlock(uint[][] KW)
{
uint[] array = KW[this.ROUNDS];
uint num = this.C0 ^ array[0];
uint num2 = this.C1 ^ array[1];
uint num3 = this.C2 ^ array[2];
uint num4 = this.C3 ^ array[3];
int i = this.ROUNDS - 1;
uint num5;
uint num6;
uint num7;
while (i > 1)
{
array = KW[i--];
num5 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 24 & 255u))] << 24)) ^ array[0]);
num6 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num2 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 24 & 255u))] << 24)) ^ array[1]);
num7 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num3 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24)) ^ array[2]);
num4 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 24 & 255u))] << 24)) ^ array[3]);
array = KW[i--];
num = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num5 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 24 & 255u))] << 24)) ^ array[0]);
num2 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num6 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 24 & 255u))] << 24)) ^ array[1]);
num3 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num7 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24)) ^ array[2]);
num4 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 24 & 255u))] << 24)) ^ array[3]);
}
array = KW[1];
num5 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 24 & 255u))] << 24)) ^ array[0]);
num6 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num2 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 24 & 255u))] << 24)) ^ array[1]);
num7 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num3 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24)) ^ array[2]);
num4 = (AesLightEngine.Inv_Mcol((uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num3 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num2 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num >> 24 & 255u))] << 24)) ^ array[3]);
array = KW[0];
this.C0 = (uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num5 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 24 & 255u))] << 24 ^ (int)array[0]);
this.C1 = (uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num6 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 24 & 255u))] << 24 ^ (int)array[1]);
this.C2 = (uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num7 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num4 >> 24 & 255u))] << 24 ^ (int)array[2]);
this.C3 = (uint)((int)AesLightEngine.Si[(int)((UIntPtr)(num4 & 255u))] ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num7 >> 8 & 255u))] << 8 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num6 >> 16 & 255u))] << 16 ^ (int)AesLightEngine.Si[(int)((UIntPtr)(num5 >> 24 & 255u))] << 24 ^ (int)array[3]);
}
private static uint Mcol(uint x)
{
uint num = AesLightEngine.FFmulX(x);
return(num ^ AesLightEngine.Shift(x ^ num, 8) ^ AesLightEngine.Shift(x, 16) ^ AesLightEngine.Shift(x, 24));
}
private BufferedBlockCipher CreateScryptoEngine()
{
IBlockCipher engine;
switch (_MSec.Algorithm)
{
case ESec.SCRYPTO_AES:
engine = new AesEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_AESFAST:
engine = new AesFastEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_AESLIGHT:
engine = new AesLightEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_BLOWFISH:
engine = new BlowfishEngine();
_MSec.KeySize = 56;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_CAMELLIA:
engine = new CamelliaEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_CAMELLIALIGHT:
engine = new CamelliaLightEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_CAST5:
engine = new Cast5Engine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_CAST6:
engine = new Cast6Engine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_DES:
engine = new DesEngine();
_MSec.KeySize = 8;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_DESEDE:
engine = new DesEdeEngine();
_MSec.KeySize = 24;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_GOST28147:
engine = new Gost28147Engine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_NOEKEON:
engine = new NoekeonEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_NULL:
engine = new NullEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 16;
break;
case ESec.SCRYPTO_RC2:
engine = new RC2Engine();
_MSec.KeySize = 128;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_RC532:
engine = new RC532Engine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_RC564:
engine = new RC564Engine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_RC6:
engine = new RC6Engine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_RIJNDAEL:
engine = new RijndaelEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_SEED:
engine = new SeedEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_SERPENT:
engine = new SerpentEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_SKIPJACK:
engine = new SkipjackEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_TEA:
engine = new TeaEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_TWOFISH:
engine = new TwofishEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
case ESec.SCRYPTO_XTEA:
engine = new XteaEngine();
_MSec.KeySize = 16;
_MSec.IVSize = 0;
break;
default:
engine = new AesEngine();
_MSec.KeySize = 32;
_MSec.IVSize = 0;
break;
}
switch (_MSec.Mode)
{
case ESec.MODE_CBC:
engine = new CbcBlockCipher(engine);
break;
case ESec.MODE_CFB:
engine = new CfbBlockCipher(engine, 8);
break;
case ESec.MODE_GOFB:
engine = new GOfbBlockCipher(engine);
break;
case ESec.MODE_OFB:
engine = new OfbBlockCipher(engine, 8);
break;
case ESec.MODE_OPENPGPCFB:
engine = new OpenPgpCfbBlockCipher(engine);
break;
case ESec.MODE_SIC:
engine = new SicBlockCipher(engine);
break;
default:
engine = new CbcBlockCipher(engine);
break;
}
IBlockCipherPadding padding = null;
switch (_MSec.Padding)
{
case ESec.PADDING_ISO10126d2:
padding = new ISO10126d2Padding();
break;
case ESec.PADDING_ISO7816d4:
padding = new ISO7816d4Padding();
break;
case ESec.PADDING_PKCS7:
padding = new Pkcs7Padding();
break;
case ESec.PADDING_TBC:
padding = new TbcPadding();
break;
case ESec.PADDING_X923:
padding = new X923Padding();
break;
case ESec.PADDING_ZEROBYTE:
padding = new ZeroBytePadding();
break;
default:
padding = new Pkcs7Padding();
break;
}
return new PaddedBufferedBlockCipher(engine, padding);
}
