Unsupported extensions ja3

[Ponao]

Hello, there some unsupported extensions in ja3

Error: Unknown cipher: 52394 (0xccaa)
Error: Unknown curve: 30 (ID: 30)
Error: Unknown curve: 258 (ID: 258)
Error: Unknown curve: 259 (ID: 259)
Error: Unknown curve: 260 (ID: 260)
And 22

Im using mac m1

im tried many tls clients for node, but yours works best, any suggsetions?

[lexiforest]

Can you provide the code snippet?

[Ponao]

import * as impers from "impers";
const { get, post, Session } = impers;

const ja3 = "771,4866-4867-4865-49195-49199-49196-49200-52393-52392-158-159-52394-49187-49191-49161-49171-49188-49192-49162-49172-103-107-156-157-60-61-47-53,65281-0-11-10-35-16-22-23-13-43-45-51,29-23-30-25-24-256-257-258-259-260,0-1-2";

const akamai = "1:4096;2:0;4:2147483647;5:131072;8:0;3:100;6:65536|2147418112|0|m,s,p,a";

try {
	const resp = await get("https://tls.peet.ws/api/all", {
		ja3,
		akamai,
	});
        console.log(resp.json());
}  catch (e) {
	console.error("Error:", e.message || e);
}

[Ponao]

Also path for lib .../.cache/impers/libcurl-impersonate/darwin-arm64/libcurl-impersonate.dylib
Maybe it will helps

[lexiforest]

Where did you get this fingerprint? It's indeed very uncommon.

[Ponao]

its from android app

[lexiforest]

This is actually an upstream issue. We need to patch boringssl to support it.

[Ponao]

https://github.com/Ponao/impers-add-ja3-exts/tree/main

i was able to make some progress with claude, tried to describe all the steps we took to rebuild and patch

Result: all ciphers/curves work, and I get the expected ja3_hash.

[lexiforest]

This is the right direction.

[Ponao]

If you have time, it would be great to see these updates in impers (in curl-impersonate lib), i only tested on mac arm, there is no opportunity to test on other os yet

[lexiforest]

If you have time, it would be great to see these updates in impers (in curl-impersonate lib), i only tested on mac arm, there is no opportunity to test on other os yet

Sure, I will find some time to do this.