#!/usr/bin/env node

/**
 * CSP Hash Calculator
 * 
 * This script calculates SHA-256 hashes for inline scripts and styles
 * to be used in Content Security Policy headers.
 * 
 * Usage:
 *   node csp-hash-calculator.js "<inline-code>"
 * 
 * Example:
 *   node csp-hash-calculator.js "document.addEventListener('DOMContentLoaded', function() { console.log('Hello'); });"
 */

const crypto = require('crypto');

// Function to calculate CSP hash
function calculateHash(content) {
  const hash = crypto.createHash('sha256').update(content, 'utf8').digest('base64');
  return `'sha256-${hash}'`;
}

// Get content from command line argument or stdin
const content = process.argv[2] || '';

if (!content) {
  console.error('Error: No content provided. Please provide content as a command line argument.');
  process.exit(1);
}

// Calculate and display the hash
const hash = calculateHash(content);
console.log('CSP Hash:');
console.log(hash);
console.log('\nAdd to your CSP header:');
console.log('For script: script-src ' + hash);
console.log('For style: style-src ' + hash);