DESPack, DESUnpack

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

Syntax

IppStatus ippsDESPack (const IppsDESSpec* pCtx, Ipp8u* pBuffer);

IppStatus ippsDESUnpack (const Ipp8u* pBuffer, IppsDESSpec* pCtx);

Parameters

pCtx	Pointer to the IppsDESSpec context.
pBuffer	Pointer to the user-defined buffer.

Description

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

Call the DESGetSize function prior to DESPack/DESUnpack 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.