Developer Reference

Contents

SMS4EncryptOFB

Encrypts a variable length data stream using SMS4 block cipher in the OFB mode.

Syntax

IppStatus ippsSMS4EncryptOFB (const Ipp8u*
pSrc
, Ipp8u*
pDst
, int
len
, int
ofbBlkSize
, const IppsSMS4Spec*
pCtx
, Ipp8u*
pIV
);
Include Files
ippcp.h
Parameters
pSrc
Pointer to the input plaintext data stream of variable length.
pDst
Pointer to the resulting ciphertext data stream.
len
Length of the plaintext data stream in bytes.
ofbBlkSize
Size of the OFB block in bytes.
pCtx
Pointer to the
IppsSMS4Spec
context.
pIV
Pointer to the initialization vector for the OFB mode operation.
Description
The function encrypts the input data stream of a variable length in the OFB 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
len
is not divisible by the
ofbBlkSize
parameter value.
ippStsOFBSizeErr
Indicates an error condition if the value of
ofbBlkSize
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.