script.js

import {
	ServicePrincipalCredentials, 
	PDFServices, 
	MimeType,
	CreatePDFJob,
	CreatePDFResult,
    ProtectPDFParams,
    EncryptionAlgorithm,
	ProtectPDFJob,
    ProtectPDFResult
} from '@adobe/pdfservices-node-sdk';

import fs from 'fs';

let CLIENT_ID = process.env.CLIENT_ID;
let CLIENT_SECRET = process.env.CLIENT_SECRET;

// Setup credentials
let credentials = new ServicePrincipalCredentials({ clientId: CLIENT_ID, clientSecret: CLIENT_SECRET });

let pdfServices = new PDFServices({ credentials });

const inputAsset = await pdfServices.upload({
	readStream:fs.createReadStream('./input.docx'),
	mimeType: MimeType.DOCX
});

console.log(`Source doc uploaded, asset ID is ${inputAsset.assetId}`);

let job = new CreatePDFJob({inputAsset});
let pollingURL = await pdfServices.submit({job});

console.log(`Create PDF job begun, polling url is ${pollingURL}`);

let response = await pdfServices.getJobResult({ pollingURL, resultType: CreatePDFResult });

console.log(`PDF created, now adding password protection.`);

const params = new ProtectPDFParams({
	userPassword: "password",
	encryptionAlgorithm: EncryptionAlgorithm.AES_256
});

// Create a new job instance
job = new ProtectPDFJob({inputAsset:response.result.asset, params});

pollingURL = await pdfServices.submit({job});
response = await pdfServices.getJobResult({
	pollingURL,
	resultType: ProtectPDFResult
});

// Get content from the resulting asset(s)
let streamAsset = await pdfServices.getContent({ asset: response.result.asset});
streamAsset.readStream.pipe(fs.createWriteStream('./output_protected.pdf'));
console.log('All done and result PDF saved.');