node-qpdf2

node-qpdf2

A very simple wrapper for qpdf which is performs content-preserving transformations on PDF files. It includes encrypting and decrypting PDF files with AES 256, AES 128, RC4 (128 & 40) encryption algorithms. This is a fork of nrhirani/node-qpdf, adding Promises and Types, and is kept mostly up to date with qpdf.

Dependencies

• qpdf
  • Version 11 is the minimum version for node-qpdf2 4.0+

Installation

1. Install qpdf:
   • Download qpdf
2. Install node-qpdf:

   npm install node-qpdf2
   

Serverless?

This package can be uses on serverless platforms by using your vendor's layers functionality. Use the zip release from qpdf as the layer. For example, qpdf-11.1.0-bin-linux-x86_64.zip can be directly uploaded as a layer, and has been tested using Amazon Lambda.

Encryption

You can encrypt your PDF by following:

import { encrypt } from "node-qpdf2";

const pdf = {
  input: "./test/example.pdf",
  output: "/tmp/encrypted.pdf",
  password: "1234",
}

await encrypt(pdf);

Options for Encryption

Please see src/encrypt.ts for the latest options, as well as QPDF's documentation for information on what each restriction does.

Examples

Render and Save:

import { encrypt } from "node-qpdf2";

const options = {
    input: "./test/example.pdf",
    keyLength: 128,
    output: "/tmp/encrypted.pdf",
    password: 'YOUR_PASSWORD_TO_ENCRYPT',
    restrictions: {
        print: 'low',
        useAes: 'y'
    }
}

await encrypt(options);

Decryption

You can decrypt your PDF by following:

import { decrypt } from "node-qpdf2";

const options = {
  input: "/tmp/encrypted.pdf",
  output: "/tmp/decrypted.pdf",
  password: "YOUR_PASSWORD_TO_DECRYPT_PDF",
}

await decrypt(options);

PDF Encryption info

You can retrieve encryption information using the info function. This function will return a Promise. See here for more information.

import { info } from "node-qpdf2";

const options = {
  input: "/tmp/encrypted.pdf",
  password: "FILE_PASSWORD",
}

console.log(await info(options));

If the file is not encrypted, the result will be "File is not encrypted".

Coverage

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	100	100	100	100
decrypt.ts	100	100	100	100
encrypt.ts	100	100	100	100
index.ts	100	100	100	100
info.ts	100	100	100	100
spawn.ts	100	100	100	100
utils.ts	100	100	100	100

Contributing

Maintained by Kyle McNally.

Bug reports and pull requests are welcome on GitHub at https://github.com/Sparticuz/node-qpdf2.

Sponsorship is also welcome

License

The npm package is available as open source under the terms of the MIT License.