HMACSHA512Pack, HMACSHA512Unpack

Packs/unpacks the IppsHMACSHA512State context into/from a user-defined buffer.

Syntax

IppStatus ippsHMACSHA512Pack (const IppsHMACSHA512State* pCtx, Ipp8u* pBuffer);

IppStatus ippsHMACSHA512Unpack (Ipp8u* pBuffer, const IppsHMACSHA512State* pCtx);

Parameters

pCtx

Pointer to the IppsHMACSHA512State context.

pBuffer

Pointer to the user-defined buffer.

Description

This functions are declared in the ippcp.h file. The HMACSHA512Pack function transforms the *pCtx context to a position-independent form and stores it in the the *pBuffer buffer. The HMACSHA512Unpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsHMACSHA512State context. The HMACSHA512Pack and HMACSHA512Unpack functions enable replacing the position-dependent IppsHMACSHA512State context in the memory.

Call the HMACSHA512GetSize function prior to HMACSHA512Pack/HMACSHA512Unpack 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.

See Also

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