Developer Reference

Contents

SMS4EncryptCTR

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

Syntax

IppStatus ippsSMS4EncryptCTR(const Ipp8u
* pSrc
, Ipp8u
* pDst
, int
len
,
const IppsSMS4Spec*
pCtx
, Ipp8u*
pCtrValue
, int
ctrNumBitSize
);
Include Files
ippcp.h
Parameters
pSrc
Pointer to the input plaintext data stream of a variable length.
pDst
Pointer to the resulting ciphertext data stream.
len
Length of the plaintext data stream in bytes.
pCtx
Pointer to the
IppsSMS4Spec
context.
pCtrValue
Pointer to the counter data block.
ctrNumBitSize
Number of bits in the specific part of the counter to be incremented.
Description
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.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804