.. _sha256messagedigest:


SHA256MessageDigest
===================


Computes SHA-256 digest value of the input message.


Syntax
------


IppStatus ippsSHA256MessageDigest(const Ipp8u \*pMsg, int len, Ipp8u
\*pMD);


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


``ippcp.h``


Parameters
----------


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   :header-rows: 0

   * -     pMsg   
     -  Pointer to the input message.
   * -     len   
     -  Message length in octets.
   * -     pMD   
     -  Pointer to the resultant digest.




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


The function uses the selected hash algorithm to compute the digest
value of the entire (non-streaming) input message.


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 the input data stream length is less than zero.