msrcrypto

// This quickstart assumes msrcrypto.js has been loaded via a <script> tag, // making the global `msrCrypto` object available. // 1. Generate an AES-CBC key const iv = new new Uint8Array(16); // Initialization Vector // On modern browsers, use window.crypto.getRandomValues(iv); // On older browsers, ensure PRNG is seeded (see warnings) or provide secure random bytes // For this example, we'll simulate random values or assume a modern environment fallback // For a truly secure setup in older IE, you'd need server-side entropy for msrCrypto.initPrng() // Simulate getRandomValues for environments where it might not be available or fully polyfilled for iv generation if (typeof window.crypto !== 'undefined' && typeof window.crypto.getRandomValues === 'function') { window.crypto.getRandomValues(iv); } else { // Fallback for demonstration, NOT cryptographically secure in production for IV for (let i = 0; i < iv.length; i++) iv[i] = Math.floor(Math.random() * 256); } msrCrypto.subtle.generateKey( { name: "AES-CBC", length: 256, // For AES-256 }, true, // key is extractable ["encrypt", "decrypt"] ) .then(function(key) { console.log("AES-CBC Key generated successfully."); // 2. Encrypt some data const dataToEncrypt = new TextEncoder().encode("Hello, msrcrypto, this is a secret message!"); return msrCrypto.subtle.encrypt( { name: "AES-CBC", iv: iv, }, key, dataToEncrypt ); }) .then(function(encryptedData) { console.log("Data encrypted successfully (ArrayBuffer):"); // In IE8/9, this might be a regular Array, convert for consistent logging if needed console.log(new Uint8Array(encryptedData)); // Further steps would involve decrypting or sending the data }) .catch(function(error) { console.error("Encryption failed:", error); });