/// <summary>
/// Gets the total number of padding bytes that will be needed.
/// </summary>
/// <param name="lastBlockBytesUsed">The total number of bytes that are used by real data in the last block.</param>
/// <param name="blockSizeInBytes">The block cipher size.</param>
/// <returns>The total number of padding bytes that will be needed.</returns>
protected virtual int InternalGetFinalPaddingCount(int lastBlockBytesUsed, int blockSizeInBytes)
{
return(PaddingUtilities.GetPaddingBytesNeeded(_PaddingMode, lastBlockBytesUsed, blockSizeInBytes));
}
protected override byte[] InternalTransformFinalBlock(byte[] input, int blockSizeInBytes)
{
return(PaddingUtilities.RemovePadding(_PaddingMode, InternalTransformBlock(input)));
}
/// <summary>
/// Transforms the last block of data.
/// </summary>
/// <param name="input">The block to transform.</param>
/// <param name="blockSizeInBytes">The expected block size.</param>
/// <returns>The result (possibly padded as needed).</returns>
protected virtual byte[] InternalTransformFinalBlock(byte[] input, int blockSizeInBytes)
{
byte[] paddedInput = PaddingUtilities.ApplyPadding(_PaddingMode, input, blockSizeInBytes);
byte[] lastBlock = InternalTransformBlock(paddedInput);
return(lastBlock);
}