.. _sha384gettag:



SHA384GetTag
============


Computes the current SHA-384 digest value of the processed part of the
message.


Syntax
------


IppStatus ippsSHA384GetTag(Ipp8u\* pTag, Ipp32u tagLen, const
IppsSHA384State\* pCtx);


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


``ippcp.h``


Parameters
----------


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

   * -     pTag   
     -  Pointer to the authentication tag.
   * -     tagLen   
     -  Length of the tag (in bytes).
   * -     pCtx   
     -  Pointer to the IppsSHA384State context.




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


The function computes the message digest based on the current context as
specified in [`FIPS PUB
180-2 <bibliography.html>`__] and
[`RFC 1321 <bibliography.html>`__].
A call to this function retains the possibility to update the digest.


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.
   * -     ippStsLengthErr   
     -  Indicates an error condition if tagLen < 1 or tagLen exceeds the maximal length of a particular digest.
   * -     ippStsContextMatchErr   
     -  Indicates an error condition if the context parameter does not match the operation.