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.