QuickCrypt Library

C++ Interface

COFBMode::Init

void Init( const unsigned char* pIV, const unsigned char* pKey, unsigned int nKeyLen = DEFAULTKEYSIZE, unsigned int fs = 0 );

void Init( const unsigned char* pIV, unsigned int fs = 0 );

Parameters

 pIV

    [in] Pointer to the initialization vector.

 pKey

    [in] Pointer to the secret key.

 nKeyLen

    [in] Length in bytes of the secret key.

 fs

    [in] Feedback size in bytes. By default fs is 0 which means to use the maximum feedback size. This size is the mostly used feedback size.

Remarks

Both member functions initialize the COFBMode object. A brief description of both of them follows.

• void Init( const unsigned char* pIV, const unsigned char* pKey, unsigned int nKeyLen = DEFAULTKEYSIZE, unsigned int fs = 0 );

Call this member function to initialize the COFBMode object with the initialization vector pointed by pIV, and the secret key pointed by pKey.

Notes. 

• The first COFBMode<T>::BLOCKSIZE bytes of the memory buffer pointed by pIV are used as the initialization vector.

• nKeyLen can be COFBMode<T>::DEFAULTKEYSIZE bytes. For Rijndael (AES) algorithm it can also be 24 or 32 bytes. For Blowfish algorithm it can be in the range 1 through 72 bytes.

• void Init( const unsigned char* pIV, unsigned int fs = 0 );

Call this member function to initialize the COFBMode object with the initialization vector pointed by pIV without changing the key set by previous initialization. Note that the first COFBMode<T>::BLOCKSIZE bytes of the memory buffer pointed by pIV are used as the initialization vector.

COFBMode Overview   |   Class Members   |   Useful Links

See Also    COFBMode::Process