SHA512Pack, SHA512Unpack

Packs/unpacks the IppsSHA512State context into/from a user-defined buffer.

Syntax

IppStatus ippsSHA512Pack (const IppsSHA512State* pCtx, Ipp8u* pBuffer);

IppStatus ippsSHA512Unpack (const Ipp8u* pBuffer, IppsSHA512State* pCtx);

Parameters

pCtx	Pointer to the IppsSHA512State context.
pBuffer	Pointer to the user-defined buffer.

Description

This functions are declared in the ippcp.h file. The SHA512Pack function transforms the *pCtx context to a position-independent form and stores it in the the *pBuffer buffer. The SHA512Unpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsSHA512State context. The SHA512Pack and SHA512Unpack functions enable replacing the position-dependent IppsSHA512State context in the memory.

Call the SHA512GetSize function prior to SHA512Pack/SHA512Unpack to determine the size of the buffer.

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.