NAME
   GenerateMacUpdate,
   CSSM_GenerateMacUpdate,
   CSP_GenerateMacUpdate - Continue the staged process of computing
                           a message authentication code (CDSA)

 SYNOPSIS
   # include <cssm.h>

    API:
        CSSM_RETURN CSSMAPI CSSM_GenerateMacUpdate
        (CSSM_CC_HANDLE CCHandle,
        const CSSM_DATA *DataBufs,
        uint32 DataBufCount)
    SPI:
        CSSM_RETURN CSSMCSPI CSP_GenerateMacUpdate
        (CSSM_CSP_HANDLE CSPHandle,
        CSSM_CC_HANDLE CCHandle,
        const CSSM_DATA *DataBufs,
        uint32 DataBufCount)

 LIBRARY
   Common Security Services Manager library (CDSA$INCSSM300_SHR.EXE)

 API PARAMETERS
   CCHandle (input)
           The handle that describes the context of this cryptographic
           operation used to link to the CSP-managed information.

   DataBufs (input)
           A pointer to a vector of CSSM_DATA structures that contain
           the data to be operated on.

   DataBufCount (input)
           The number of DataBufs.

 SPI PARAMETERS
   CSPHandle (input)
           The handle that describes the add-in cryptographic service
           provider module used to perform calls to CSSM for the memory
           functions managed by CSSM.

 DESCRIPTION
   This function continues the staged process of computing a message
   authentication code over all data contained in the set of input
   buffers.  The authentication code will be returned as a result of
   the final code generation step.

 RETURN VALUE
   A CSSM_RETURN value indicating success or specifying a particular
   error condition. The value CSSM_OK indicates success. All other
   values represent an error condition.

 ERRORS
   Errors are described in the CDSA technical standard.  See CDSA.

   None specific to this call.

 SEE ALSO
   Books

   Intel CDSA Application Developer's Guide (see CDSA)

   Other Help Topics

   Functions for the CSSM API:

       CSSM_GenerateMac
       CSSM_GenerateMacInit
       CSSM_GenerateMacFinal

   Functions for the CSP SPI:

       CSP_GenerateMac
       CSP_GenerateMacInit
       CSP_GenerateMacFinal