ARCFive64DecryptCFB

Decrypts a variable length data stream using the RC5 cipher with 64-bit block size in the CFB mode.

Syntax

IppStatus ippsARCFive64DecryptCFB (const Ipp8u* pSrc, Ipp8u* pDst, int length, int cfbBlkSize, const IppsARCFive64Spec* pCtx, const Ipp8u* pIV, IppsCPPadding padding);

Parameters

pSrc	Pointer to the input ciphertext data stream of variable length.
pDst	Pointer to the resulting plaintext data stream.
length	Length of the ciphertext data stream in bytes.
cfbBlkSize	Size of the CFB block in bytes.
pCtx	Pointer to the IppsARCFive64Spec 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 a variable length in 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 input data stream length is less than or equal to zero.
ippStsUnderRunErr	Indicates an error condition if length is not divisible by the cfbBlkSize parameter value.
ippStsCFBSizeErr	Indicates an error condition if the value of cfbBlkSize is illegal.
ippStsContextMatchErr	Indicates an error condition if the context parameter does not match the operation.