Support ChaCha20-Poly1305 in `node:crypto`

[cemelo]

What is the problem this feature would solve?

I'm trying to build a HomeKit bridge using hap-nodejs. It depends on the support for ChaCha20-Poly1305 to be able to run.

What is the feature you are proposing to solve the problem?

Adding support for that cipher is enough, afaik, to enable hap-nodejs to run on top of Bun.

What alternatives have you considered?

N/A

[javalsai]

I'm using a JS implementation from npm for now, but it's somewhat slow (it's pure JS) and checking the github is old code which I can barely understand. Just in case is looking for a functional alternative for now.

I also tried making a .d.ts file for it, not really a TS expert, but it includes definitions for most of the basic functions (if somebody can make it better, please do):

import { Transform } from "node:stream"

declare class CipherBase extends Transform {
	update(data: Buffer, inputEnc?: BufferEncoding, outputEnv?: BufferEncoding)
	final(): Buffer
}

declare class PolyStream extends CipherBase {
	_update(data: Buffer)
	_final(): Buffer
}

declare class Cipher {
	constructor(key: Buffer, nonce: Buffer, decrypt?: bool)
	setAAD(aad: Buffer): void
	_update(chunk: Buffer): Buffer
	_final(): void
	getAuthTag(): Buffer
	setAuthTag(tag: Buffer): void
}

declare class CipherLegacy {
	constructor(key: Buffer, nonce: Buffer, decrypt?: bool)
	setAAD(aad: Buffer): void
	_flushlentag(): void
	_update(chunk: Buffer): Buffer
	_final(): void
	getAuthTag(): Buffer
	setAuthTag(tag: Buffer): void
}

declare class ChaChaStream extends CipherBase {
	constructor(key: Buffer, iv: Buffer)
}

declare module chacha {
	let aead: Cipher
	let createHmac: typeof PolyStream
	let chacha20: typeof ChaChaStream
	let ChaCha20: typeof ChaChaStream
	let aeadLegacy: typeof CipherLegacy
	let AeadLegacy: typeof CipherLegacy
	function createCipher(key: Buffer, iv: Buffer, decrypt?: bool): Cipher;
	function createDecipher(key: Buffer, iv: Buffer, decrypt?: bool): Cipher;
}

export let Transform
export default chacha

[Tomato6966]

Any progress on this?

[javalsai]

Any progress on this?

Still broken in the last bun version, you'll have to do it some other way.

I was able to squeeze the most performance of it using wasm (and made my own lib). But it's a little mess and painful to set up, also depends on rust.

[kigawas]

I created a library to support multi-platform ciphers. It'll use node:crypto's chacha20-poly1305 on node and pure js implementation on bun/deno. aes-256-gcm and xchacha20-poly1305 (which node:crypto does not have) are also supported.

https://github.com/ecies/js-ciphers

[Tomato6966]

would love bun to implement it nativly in their eco system.

[Tomato6966]

I see there is some progress 👀

[tiagozip]

any update on this? 👀