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. |