HMACSHA256Pack, HMACSHA256Unpack

Packs/unpacks the IppsHMACSHA256State context into/from a user-defined buffer.

Syntax

IppStatus ippsHMACSHA256Pack (const IppsHMACSHA256State* pCtx, Ipp8u* pBuffer);

IppStatus ippsHMACSHA256Unpack (Ipp8u* pBuffer, const IppsHMACSHA256State* pCtx);

Parameters

pCtx

Pointer to the IppsHMACSHA256State context.

pBuffer

Pointer to the user-defined buffer.

Description

This functions are declared in the ippcp.h file. The HMACSHA256Pack function transforms the *pCtx context to a position-independent form and stores it in the the *pBuffer buffer. The HMACSHA256Unpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsHMACSHA256State context. The HMACSHA256Pack and HMACSHA256Unpack functions enable replacing the position-dependent IppsHMACSHA256State context in the memory.

Call the HMACSHA256GetSize function prior to HMACSHA256Pack/HMACSHA256Unpack 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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