Developer Reference

Contents

SMS4DecryptCBC

Decrypts byte data stream according to SMS4 in the CBC mode.

Syntax

IppStatus ippsSMS4DecryptCBC(const Ipp8u*
pSrc
, Ipp8u*
pDst
, int
len
, const IppsSMS4Spec*
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 the variable length.
len
Length of the ciphertext data stream length in bytes.
pCtx
Pointer to the
IppsSMS4Spec
context.
pIV
Pointer to the initialization vector for CBC mode operation.
Description
The function decrypts the input data stream of a variable length according to the CBC 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.
ippStsContextMatchErr
Indicates an error condition if the context parameter does not match the operation.
ippStsUnderRunErr
Indicates an error condition if
len
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.