Recrypt Node Binding

Bindings to be able to use Recrypt Rust from NodeJS code. Improves the performance of Recrypt operations by using native code.

This library uses the Neon Bindings toolchain to compile the Recrypt Rust library into a binary NodeJS file that can be used from Node applications. The Neon Bindings provide a way to write a shim which converts data in/out of the Recrypt Rust code. The resulting binary Node file can then be included into a NodeJS module just like any other NPM dependency.

Supported Platforms

	Node 16	Node 18	Node 20	Node 21
Linux x64 - glibc	✓	✓	✓	✓
Linux x64 - musl-libc	✓	✓	✓	✓
Linux arm64 - glibc	✓	✓	✓	✓
Linux arm64 - musl-libc	✓	✓	✓	✓
OSX x64	✓	✓	✓	✓
OSX arm64	✓	✓	✓	✓
Windows x64	✓	✓	✓	✓

Install

npm install @ironcorelabs/recrypt-node-binding

The binary that is generated via the Neon Bindings toolchain is platform specific. We use the node-pre-gyp tool to pre-compile binaries for the most popular platforms. When you npm install this library it will automatically pull down the proper binary for your platform from the binaries uploaded to the releases page.

This means that you'll need to make sure that the machine that runs npm install is the machine where the code will run. This library will not work if you run npm install on an OSX machine and move the node_modules directory over to a Linux machine, for example.

If the machine you run npm install on is not one of the supported architectures you will get an install failure. If there's an architecture that you'd like supported that isn't yet available, open a new issue and we'll look into adding support for it. You can also build the bindings yourself to generate a binary file for whichever architecture you need. Refer to the local development section for details.

Types

This library contains a TypeScript definitions file which shows the available classes and methods.

Examples

The following examples show how to use this library from a NodeJS application

Basic Encrypt/Decrypt Example

const assert = require("assert");
const Recrypt = require("@ironcorelabs/recrypt-node-binding");

//Create a new Recrypt API instance
const Api256 = new Recrypt.Api256();

//Generate both a user key pair and a signing key pair
const keys = Api256.generateKeyPair();
const signingKeys = Api256.generateEd25519KeyPair();

//Generate a plaintext to encrypt
const plaintext = Api256.generatePlaintext();

//Encrypt the data to the public key and then attempt to decrypt with the private key
const encryptedValue = Api256.encrypt(plaintext, keys.publicKey, signingKeys.privateKey);
const decryptedValue = Api256.decrypt(encryptedValue, keys.privateKey);

assert.equal(decryptedValue, plaintext);

Single-hop Transform Encryption Example

const assert = require("assert");
const Recrypt = require("@ironcorelabs/recrypt-node-binding");

//Create a new Recrypt API instance
const Api256 = new Recrypt.Api256();

//Generate both a user key pair and a signing key pair
const userKeys = Api256.generateKeyPair();
const signingKeys = Api256.generateEd25519KeyPair();

//Generate a plaintext to encrypt
const plaintext = Api256.generatePlaintext();

//Encrypt the data to the user public key
const encryptedValue = Api256.encrypt(plaintext, userKeys.publicKey, signingKeys.privateKey);

//Generate a second public/private key pair as the target of the transform. This will allow the encrypted data to be
//transformed to this second key pair and allow it to be decrypted.
const deviceKeys = Api256.generateKeyPair();

//Generate a transform key from the user private key to the device public key
const userToDeviceTransformKey = Api256.generateTransformKey(userKeys.privateKey, deviceKeys.publicKey, signingKeys.privateKey);

//Transform the encrypted data (without decrypting it!) so that it can be decrypted with the second key pair
const transformedEncryptedValue = Api256.transform(encryptedValue, userToDeviceTransformKey, signingKeys.privateKey);

//Decrypt the data using the second private key
const decryptedValue = Api256.decrypt(transformedEncryptedValue, deviceKeys.privateKey);

assert.equal(decryptedValue, plaintext);

Local Development

In order to build the binary Node file for Recrypt, you'll need the dependencies specified on the Neon Bindings site. Follow their getting started directions and install Rust and the Node Build Tools. The Neon CLI is already installed as a dependency of this project so you don't have to install that as a global dependency.

Once all of those dependencies are installed, the following can be run.

npm run compile

or

yarn compile

This will produce an index.node file within the bin-package directory. This file can be used directly, or via index.js:

const recrypt = require('index.js');

Benchmarks

• From this repos root, run npm i or yarn.
• Run npm/yarn run compile to compile the Rust source into a bin-package/index.node module.
• Run npm/yarn run benchmark.

Unit Tests

• From this repos root, run npm i or yarn.
• Run npm/yarn run compile to compile the Rust source into a bin-package/index.node module.
• Run npm/yarn run test.

Copyright (c) 2021 IronCore Labs, Inc. All rights reserved.