.. _sha384pack-sha384unpack:




SHA384Pack, SHA384Unpack
========================


Packs/unpacks the IppsSHA384State context into/from a user-defined
buffer.


Syntax
------


IppStatus ippsSHA384Pack (const IppsSHA384State\* pCtx, Ipp8u\*
pBuffer);


IppStatus ippsSHA384Unpack (const Ipp8u\* pBuffer, IppsSHA384State\*
pCtx);


Include Files
-------------


``ippcp.h``


Parameters
----------


.. list-table:: 
   :header-rows: 0

   * -     pCtx   
     -  Pointer to the IppsSHA384State context.
   * -     pBuffer   
     -  Pointer to the user-defined buffer.




Description
-----------


The SHA384Pack function transforms the \*pCtx context to a
position-independent form and stores it in the \*pBuffer buffer. The
SHA384Unpack function performs the inverse operation, that is,
transforms the contents of the \*pBuffer buffer into a normal
IppsSHA384State context. The SHA384Pack and SHA384Unpack functions
enable replacing the position-dependent IppsSHA384State context in the
memory.


Call the
`SHA384GetSize <sha384getsize.html>`__
function prior to SHA384Pack/SHA384Unpack to determine the size of the
buffer.


Return Values
-------------


.. list-table:: 
   :header-rows: 0

   * -     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.
   * -     ippStsContextMatchErr   
     -  Indicates an error condition if the context parameter does not match the operation.