HMACSHA224Pack, HMACSHA224Unpack

Packs/unpacks the IppsHMACSHA224State context into/from a user-defined buffer.

Syntax

IppStatus ippsHMACSHA224Pack (const IppsHMACSHA224State* pCtx, Ipp8u* pBuffer);

IppStatus ippsHMACSHA224Unpack (Ipp8u* pBuffer, const IppsHMACSHA224State* pCtx);

Parameters

pCtx

Pointer to the IppsHMACSHA224State context.

pBuffer

Pointer to the user-defined buffer.

Description

This functions are declared in the ippcp.h file. The HMACSHA224Pack function transforms the *pCtx context to a position-independent form and stores it in the the *pBuffer buffer. The HMACSHA224Unpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsHMACSHA224State context. The HMACSHA224Pack and HMACSHA224Unpack functions enable replacing the position-dependent IppsHMACSHA224State context in the memory.

Call the HMACSHA224GetSize function prior to HMACSHA224Pack/HMACSHA224Unpack 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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