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GFpECDecryptSM2_Ext_DecMsgSize¶

Gets the buffer size of the SM2 Decrypt message text.

Syntax¶

IppStatus ippsGFpECDecryptSM2_Ext_DecMsgSize(const IppsGFpECState * pEC, int ptMsgSize, int * pSize)

Include Files¶

ippcp.h

Parameters¶

pEC	Pointer to the elliptic curve context.
ptMsgSize	Decrypted text size.
pSize	Pointer to the size, in bytes, of the buffer cipher text.

Description¶

The function computes the size of the buffer in bytes for the message text to be used later. The pEC parameter represents a properly initialized elliptic curve using the SM2 Decrypt.

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 are NULL.
ippStsContextMatchErr	Indicates an error condition if the `IppsGFpECState` context parameter does not match the operation.
ippStsNotSupportedModeErr	Indicates an error condition if the `IppsGFpECState` context parameter defines an elliptic curve over an extension of the prime finite field.
ippStsOutOfRangeErr	Indicates an error condition if ctMsgSize < 0.

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GFpECEncryptSM2_Ext_EncMsgSize

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