HP OpenVMS Systems Documentation

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HP Open Source Security for OpenVMS Volume 1: Common Data Security Architecture > CDSA API Functions

VerifyMacUpdate

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NAME

CSSM_VerifyMacUpdate, CSP_VerifyMacUpdate — Continue the staged process of verifying the message authentication code (CDSA)

SYNOPSIS

# include <cssm.h>
API:
CSSM_RETURN CSSMAPI CSSM_VerifyMacUpdate
(CSSM_CC_HANDLE CCHandle,
const CSSM_DATA *DataBufs,
uint32 DataBufCount)
SPI:
CSSM_RETURN CSSMCSPI CSP_VerifyMacUpdate
(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 verifying the message authentication code over all data in the set of input buffers. Verification will be based on the authentication code presented as input when finalizing the staged verification process.

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.

None specific to this call.

SEE ALSO

Books

Intel CDSA Application Developer's Guide

Online Help

Functions for the CSSM API:

CSSM_VerifyMac, CSSM_VerifyMacInit, CSSM_VerifyMacFinal

Functions for the CSP SPI:

CSP_VerifyMac, CSP_VerifyMacInit, CSP_VerifyMacFinal