Developer Reference

Contents

AESDecryptCFB

Decrypts byte data stream according to AES in CFB mode.

Syntax

IppStatus ippsAESDecryptCFB(const Ipp8u*
pSrc
, Ipp8u*
pDst
, int
srclen
, int
cfbBlkSize
, const IppsAESSpec*
pCtx
, const Ipp8u*
pIV
);
Include Files
ippcp.h
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
IppsAESSpec
context.
pIV
Pointer to the initialization vector for the CFB mode operation.
Description
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.

Product and Performance Information

1

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