AESPack, AESUnpack

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

Syntax

IppStatus ippsAESPack (const IppsAESSpec* pCtx, Ipp8u* pBuffer, int bufSize);

IppStatus ippsAESUnpack (const Ipp8u* pBuffer, IppsAESSpec* pCtx, int ctxSize);

Include Files

ippcp.h

Parameters

pCtx	Pointer to the IppsAESSpec context.
pBuffer	Pointer to the user-defined buffer.
bufSize	Available size of the buffer.
ctxSize	Available size of the context.

Description

The AESPack function transforms the *pCtx context to a position-independent form and stores it in the *pBuffer buffer. The AESUnpack function performs the inverse operation, that is, transforms the contents of the *pBuffer buffer into a normal IppsAESSpec context. The AESPack and AESUnpack functions enable replacing the position-dependent IppsAESSpec context in the memory.

Call the AESGetSize function prior to AESPack/AESUnpack 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.
ippStsLengthErr	Indicates an error condition if bufSize or ctxSize is less than the real size of the IppsAESSpec context.
ippStsContextMatchErr	Indicates an error condition if the pCtx parameter does not match the operation.