HP OpenVMS Systems Documentation

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

VerifyMac

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NAME

CSSM_VerifyMac, CSP_VerifyMac — Verify the message authentication code (CDSA)

SYNOPSIS

# include <cssm.h>
API:
CSSM_RETURN CSSMAPI CSSM_VerifyMac
(CSSM_CC_HANDLE CCHandle,
const CSSM_DATA *DataBufs,
uint32 DataBufCount,
const CSSM_DATA *Mac)
SPI:
CSSM_RETURN CSSMCSPI CSP_VerifyMac
(CSSM_CSP_HANDLE CSPHandle,
CSSM_CC_HANDLE CCHandle,
const CSSM_CONTEXT *Context,
const CSSM_DATA *DataBufs,
uint32 DataBufCount,
const CSSM_DATA *Mac)

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.

Mac (input) 

A pointer to the CSSM_DATA structure containing the MAC to verify.

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.

Context (input) 

Pointer to CSSM_CONTEXT structure that describes the attributes with this context.

DESCRIPTION

This function verifies the message authentication code over all data contained in the set of input buffers based on the input signature.

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.

CSSMERR_CSP_INPUT_LENGTH_ERROR
CSSMERR_CSP_VERIFY_FAILED
CSSMERR_CSP_INVALID_SIGNATURE

SEE ALSO

Books

Intel CDSA Application Developer's Guide

Online Help

Functions for the CSSM API:

CSSM_VerifyMacInit, CSSM_VerifyMacUpdate, CSSM_VerifyMacFinal

Functions for the CSP SPI:

CSP_VerifyMacInit, CSP_VerifyMacUpdate, CSP_VerifyMacFinal