Developer Reference

Contents

TDESEncryptCFB

Encrypts variable length data stream in the CFB mode (deprecated).

Syntax

IppStatus ippsTDESEncryptCFB(const Ipp8u *
pSrc
, Ipp8u *
pDst
, int
length
, int
cfbBlkSize
, const IppsDESSpec *
pCtx1
, const IppsDESSpec *
pCtx2,
const IppsDESSpec *
pCtx3,
const Ipp8u *
pIV
, IppsCPPadding
padding
);
Include Files
ippcp.h
Parameters
pSrc
Input plaintext data stream of variable length.
pDst
Resulting ciphertext data stream.
pIV
Initialization vector for TDES CFB mode operation.
length
Input data stream length in bytes.
pCtx1
First set of round keys scheduled for TDES internal operations.
pCtx2
Second set of round keys scheduled for TDES internal operations.
pCtx3
Third set of round keys scheduled for TDES internal operations.
cfbBlkSize
CFB block size in bytes.
padding
IppsCPPaddingNONE
padding scheme.
Description
This algorithm is considered weak due to known attacks on it. The functionality remains in the library, but the implementation will no longer be optimized and no security patches will be applied. A more secure alternative is available: AES.
This function encrypts the input data stream of a variable length according to the cipher scheme specified in [NIST SP 800-38A]. The function uses three sets of the supplied round keys in the Cipher Feedback (CFB) mode with the initialization vector. The function returns the ciphertext result.
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
cfbBlkSize
parameter value.
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.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.