Verify PDF Signature

verify-pdf-signature.js

const verifyPDF = require('pdf-signature-reader-jpc');
const fs = require('fs');
const path = require('path');

// Define paths
const filesPath = 'files';
const resultsPathPrefix = 'results';
const timestamp = new Date().toISOString().replace(/[:]/g, '-').split('.')[0];
const resultsPath = path.join(resultsPathPrefix, timestamp);
const verifiedPath = path.join(resultsPath, 'verified');
const failedPath = path.join(resultsPath, 'failed');

const createDirectory = (dirPath) => {
	if (!fs.existsSync(dirPath)) {
		fs.mkdirSync(dirPath, { recursive: true });
	}
};
createDirectory(resultsPath);
createDirectory(verifiedPath);
createDirectory(failedPath);

const copyFile = (file, destinationPath) => {
	const source = path.join(filesPath, file);
	const destination = path.join(destinationPath, file);
	fs.copyFileSync(source, destination);
	console.log(destinationPath === verifiedPath
		? '🟢 File moved to verified directory'
		: '🔴 File moved to failed directory');
};

const files = fs.readdirSync(filesPath);
for (const file of files) {
	console.log('==============================================');
	console.log('Document:', file);
	try {
		const signedPdfBuffer = fs.readFileSync(path.join(filesPath, file));
		const {
			verified,
			authenticity,
			integrity,
			expired,
		} = verifyPDF(signedPdfBuffer);

		console.log('verified:', verified);
		console.log('authenticity:', authenticity);
		console.log('integrity:', integrity);
		console.log('expired:', expired);
		if (verified && authenticity && integrity && !expired) {
			copyFile(file, verifiedPath);
		} else {
			copyFile(file, failedPath);
		}
	} catch (error) {
		console.error('Error processing file:', file, error.message);
		copyFile(file, failedPath);
	}
	console.log('==============================================');
}