internal static void ProcessArray(BC.Crypto.IBlockCipher Cipher, byte[] Data, int DataOffset, byte[] Output, int OutputOffset, int Length)
{
if (Data == null || Output == null || Cipher == null)
{
throw new InvalidOperationException("Null parameters not allowed.");
}
if (Length + DataOffset > Data.Length)
{
throw new ArgumentOutOfRangeException("Length + DataOffset > Data.Length");
}
if (DataOffset >= Data.Length)
{
throw new ArgumentOutOfRangeException("DataOffset > Data.Length");
}
if (Length + OutputOffset > Output.Length)
{
throw new ArgumentOutOfRangeException("Length + OutputOffset > Output.Length");
}
if (OutputOffset >= Output.Length)
{
throw new ArgumentOutOfRangeException("OutputOffset > Output.Length");
}
int blockSize = Cipher.GetBlockSize();
byte[] XOR_ME = new byte[Cipher.GetBlockSize()];
for (int i = 0; i < Length && i < Data.Length; i += blockSize)
{
int count = Math.Min(blockSize, Length - i);
Buffer.BlockCopy(Data, i + DataOffset, XOR_ME, 0, count);
Cipher.ProcessBlock(XOR_ME, 0, XOR_ME, 0);
Buffer.BlockCopy(XOR_ME, 0, Output, i + OutputOffset, count);
}
}
public static KeySizes[] GetBlockSizes(object algo)
{
SymmetricAlgorithm sa = algo as SymmetricAlgorithm;
if (sa != null)
{
return(sa.LegalBlockSizes);
}
Org.BouncyCastle.Crypto.IBlockCipher cipher = algo as Org.BouncyCastle.Crypto.IBlockCipher;
if (cipher == null)
{
throw new NotSupportedException();
}
return(new KeySizes[] { new KeySizes(128, 128, 0) });
}
// ['blockcontents' 'LENGTH in bytes']
// [magicbytes 4][version 4][salt 16][hmacsha512 64][hmacsha3_512 64][aesiv 16][ciphertext (variable length)]
// embedded in the ciphertext are an additional 24 for the xsalsa20 IV, twofish removed!
internal static void ProcessArray(BC.Crypto.IBlockCipher Cipher, byte[] Data, byte[] Output)
{
if (Data == null || Output == null || Cipher == null)
{
throw new InvalidOperationException("Null parameters not allowed.");
}
int blockSize = Cipher.GetBlockSize();
byte[] XOR_ME = new byte[Cipher.GetBlockSize()];
for (int i = 0; i < Data.Length; i += blockSize)
{
int count = Math.Min(blockSize, Data.Length - i);
Buffer.BlockCopy(Data, i, XOR_ME, 0, count);
Cipher.ProcessBlock(XOR_ME, 0, XOR_ME, 0);
Buffer.BlockCopy(XOR_ME, 0, Output, i, count);
}
}
