# ja4

> Parse JA4 TLS fingerprint strings into structured objects

## Install

```sh
# npm
npm install @hckhanh/ja4

# JSR
npx jsr add @hckhanh/ja4
```

## Usage

```ts
import { parseJA4 } from "@hckhanh/ja4";

const result = parseJA4("t13d1516h2_8daaf6152771_02713d6af862");

console.log(result.sectionA.protocol); // "TCP"
console.log(result.sectionA.tlsVersion); // "1.3"
console.log(result.sectionA.sni); // "domain"
console.log(result.sectionA.cipherSuiteCount); // 15
console.log(result.sectionA.extensionCount); // 16
console.log(result.sectionA.alpn); // "h2"
console.log(result.cipherSuiteHash); // "8daaf6152771"
console.log(result.extensionHash); // "02713d6af862"
```