HMACSHA1Pack, HMACSHA1Unpack

Packs/unpacks the IppsHMACSHA1State context into/from a user-defined buffer.

Syntax

IppStatus ippsHMACSHA1Pack (const IppsHMACSHA1State* pCtx, Ipp8u* pBuffer);

IppStatus ippsHMACSHA1Unpack (Ipp8u* pBuffer, const IppsHMACSHA1State* pCtx);

Parameters

pCtx

Pointer to the IppsHMACSHA1State context.

pBuffer

Pointer to the user-defined buffer.

Description

This functions are declared in the ippcp.h file. The HMACSHA1Pack function transforms the *pCtx context to a position-independent form and stores it in the the *pBuffer buffer. The HMACSHA1Unpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsHMACSHA1State context. The HMACSHA1Pack and HMACSHA1Unpack functions enable replacing the position-dependent IppsHMACSHA1State context in the memory.

Call the HMACSHA1GetSize function prior to HMACSHA1Pack/HMACSHA1Unpack 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

Submit feedback on this help topic

Copyright © 2000 - 2010, Intel Corporation. All rights reserved.