TwofishEncryptCTR

Encrypts a variable length data stream in the CTR mode.

Syntax

IppStatus ippsTwofishEncryptCTR(const Ipp8u* pSrc, Ipp8u* pDst, int srcLen, const IppsTwofishSpec* pCtx, Ipp8u* pCtrValue , int ctrNumBitSize);

Parameters

pSrc	Pointer to the input plaintext data stream of a variable length.
pDst	Pointer to the resulting ciphertext data stream.
srcLen	Length of the plaintext data stream in bytes.
pCtx	Pointer to the IppsTwofishSpec context.
pCtrValue	Pointer to the counter data block.
ctrNumBitSize	Number of bits in the specific part of the counter to be incremented.

Description

This function is declared in the ippcp.h file. The function encrypts the input data stream of a variable length according to the CTR 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.
ippStsCTRSizeErr	Indicates an error condition if the value of the ctrNumBitSize is illegal.
ippStsContextMatchErr	Indicates an error condition if the context parameter does not match the operation.