react-native-social-x-auth/lib/module/pkceUtils.js

A lightweight React Native library for authenticating with X (formerly Twitter) using OAuth 2.0 with PKCE. Provides a secure and seamless login experience through Android Custom Tabs and iOS Safari ViewController. Built specifically for integrating X auth

"use strict";

import { sha256 } from '@noble/hashes/sha2';
import base64 from 'react-native-base64';
function generateCodeVerifier(length = 43) {
  const possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~';
  let verifier = '';
  for (let i = 0; i < length; i++) {
    verifier += possible.charAt(Math.floor(Math.random() * possible.length));
  }
  return verifier;
}
function base64UrlEncode(bytes) {
  const base64Str = base64.encodeFromByteArray(bytes);
  return base64Str.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
}
function generateCodeChallenge(verifier) {
  try {
    const data = new TextEncoder().encode(verifier);
    const hash = sha256(data);
    return base64UrlEncode(hash).replace(/=/g, '');
  } catch (error) {
    console.error('Error in generateCodeChallenge:', error);
    throw error;
  }
}
export { generateCodeVerifier, generateCodeChallenge };
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