SHA1Pack, SHA1Unpack

Packs/unpacks the IppsSHA1State context into/from a user-defined buffer.

Syntax

IppStatus ippsSHA1Pack (const IppsSHA1State* pCtx, Ipp8u* pBuffer);

IppStatus ippsSHA1Unpack (const Ipp8u* pBuffer, IppsSHA1State* pCtx);

Parameters

pCtx	Pointer to the IppsSHA1State context.
pBuffer	Pointer to the user-defined buffer.

Description

This functions are declared in the ippcp.h file. The SHA1Pack function transforms the *pCtx context to a position-independent form and stores it in the the *pBuffer buffer. The SHA1Unpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsSHA1State context. The SHA1Pack and SHA1Unpack functions enable replacing the position-dependent IppsSHA1State context in the memory.

Call the SHA1GetSize function prior to SHA1Pack/SHA1Unpack 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.