Rijndael192DecryptCFB

Decrypts a byte data stream according to Rijndael in the CFB mode.

Syntax

IppStatus ippsRijndael192DecryptCFB(const Ipp8u* pSrc, Ipp8u* pDst, int srclen, int cfbBlkSize, const IppsRijndael192Spec* pCtx, const Ipp8u* pIV, IppsCPPadding padding);

Parameters

pSrc	Pointer to the input ciphertext data stream.
pDst	Pointer to the resulting plaintext data stream of variable length.
srclen	Length of the ciphertext data stream in bytes.
cfbBlkSize	Size of the CFB block in bytes.
pCtx	Pointer to the IppsRijndael192Spec context.
pIV	Pointer to the initialization vector for the CFB mode operation.
padding	IppsCPPaddingNONE padding scheme.

Description

This function is declared in the ippcp.h file. The function decrypts the input data stream of variable length according to the CFB mode as specified in [NIST SP 800-38A].

Return Values

ippStsNoErr	Indicates no error. Any other value indicates an error or warning.
ippStsNullPtrErr	Indicates an error condition if any of the specified pointers is NULL.
ippStsLengthErr	Indicates an error condition if the output data stream length is less than or equal to zero.
ippStsCFBSizeErr	Indicates an error condition if the value for cfbBlkSize is illegal.
ippStsContextMatchErr	Indicates an error condition if the context parameter does not match the operation.
ippStsUnderRunErr	Indicates an error condition if srcLen is not divisible by cipher block size.