HMAC_Pack, HMAC_Unpack¶
Packs/unpacks the IppsHMACState or IppsHMACState_rmf context into/from a user-defined buffer.
Syntax¶
IppStatus ippsHMAC_Pack (const IppsHMACState* pCtx, Ipp8u* pBuffer, int bufSize);
IppStatus ippsHMACPack_rmf (const IppsHMACState_rmf* pCtx, Ipp8u* pBuffer, int bufSize);
IppStatus ippsHMAC_Unpack (const Ipp8u* pBuffer, IppsHMACState* pCtx);
IppStatus ippsHMACUnpack_rmf (const Ipp8u* pBuffer, IppsHMACState_rmf* pCtx);
Include Files¶
ippcp.h
Parameters¶
pCtx |
Pointer to the IppsHMACState or IppsHMACState_rmf context. |
pBuffer |
Pointer to the user-defined buffer. |
bufSize |
The size of the user-defined buffer in bytes. |
Description¶
The HMAC_Pack function transforms the *pCtx context to a position-independent form and stores it in the *pBuffer buffer. The HMAC_Unpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsHMACState or IppsHMACState_rmf context. The HMAC_Pack and HMAC_Unpack functions enable replacing the position-dependent IppsHMACState or IppsHMACState_rmf context in the memory. Call the HMAC_GetSize function prior to HMAC_Pack to determine the size of the buffer.
Note
This function has a reduced memory footprint version. To learn more, see Reduced Memory Footprint Functions.
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. |
ippStsMemErr |
Indicates an error condition if the value of bufSize is less than the size of the IppsHMACState or IppsHMACState_rmf context. |