QuickCrypt Library

C++ Interface

CCBCMode::ProcessLastBlock

unsigned int ProcessLastBlock( unsigned char* pDestBlock, const unsigned char* pSrcBlock, unsigned int nSize );

Return Value

The size in bytes of the memory block pointed by pDestBlock that receives the result of encryption/decryption.

Parameters

pDestBlock

    [out] Pointer to the memory block that will receive the result of encryption/decryption. 

 pSrcBlock

    [in] Pointer to the memory block that has to be encrypted/decrypted.

 nSize

    [in] Size in bytes of the memory block pointed by pSrcBlock. It can be in the range 0 through CCBCMode<T>::BLOCKSIZE bytes.

Remarks

Call this member function to encrypt/decrypt a memory block that is shorter than CCBCMode<T>::BLOCKSIZE bytes. Usually this is the last block that has to be processed. The result is retrieved in the memory block pointed by pDestBlock.

If the memory block pointed by pSrcBlock is shorter than CCBCMode<T>::BLOCKSIZE bytes and the CCBCMode object has been initialized to be padded (bPadded flag was set to true) than the padding string is added to the end of the block to fill it.

To perform an in-place encryption/decryption, make pDestBlock equal to pSrcBlock.

Note. To perform encryption/decryption in CBC mode it is easier to use Process member function instead of ProcessBlock and ProcessLastBlock.

CCBCMode Overview   |   Class Members   |   Useful Links

See Also    CCBCMode::Init, CCBCMode::ProcessBlock