QuickCrypt Library

C++ Interface

CCBCMode

template< class T > class CCBCMode

Parameters

 T

    Template parameter specifying the type of the encryption object. It can be one of the following: CDES, CDES_EDE2, CDES_EDE3, CDESX, CRijndael or CAES, CBlowfish, CGOST.

Remarks

CCBCMode class assists you in performing encryption/decryption in CBC mode of operation.

To encrypt/decrypt a continuous memory buffer, perform the following:

• Instantiate a CCBCMode object passing to the constructor the initialization vector, the secret key and the cipher direction (SLC_ENCRYPT or SLC_DECRYPT).

• Call the Process member function to encrypt/decrypt the memory buffer.

Note. The Process member function can be replaced with ProcessBlock and ProcessLastBlock member functions. Divide the memory buffer into blocks of CCBCMode<T>::BLOCKSIZE bytes each and call ProcessBlock member function for each of them. If the last block that has to be processed is shorter than CCBCMode<T>::BLOCKSIZE bytes call ProcessLastBlock member function instead of ProcessBlock.

• Call the Init member function to initialize the CCBCMode object with another initialization vector, secret key, and/or to change its cipher direction.

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