Developer Reference

Contents

GFpECESDecrypt_SM2

Decrypts the ciphertext data buffer.

Syntax

IppStatus ippsGFpECESDecrypt_SM2(const Ipp8u*
pInput
, Ipp8u*
pOutput
, int
len
, IppsECES_StateSM2*
pState
);
Include Files
ippcp.h
Parameters
pInput
Pointer to the ciphertext data buffer.
pOutput
Pointer to the plaintext data buffer.
len
Length of the input and output buffers.
pState
Pointer to the buffer being initialized as the ECES context.
Description
The function decrypts the ciphertext data buffer and updates the authentication tag. For more information on decryption and authentication, see [SM2 PKE]
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
.
ippStsContextMatchErr
Indicates an error condition if the
IppsECES_StateSM2
context parameter does not match the operation.
ippStsSizeErr
Indicates an error condition if the
len
parameter has a negative value.

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