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The crypto API in Node.js provides a set of cryptographic functionalities to help developers secure their applications. It includes methods for hashing, encryption, decryption, and generating secure random values. This module is available in the Azion Runtime through Node.js compatibility, so you can use it inside functions to sign requests, verify message integrity, or generate unique identifiers close to your users.

The example below shows how to use the crypto module in a function:

/**
 * An example of using the Node.js Crypto API in an Azion Function.
 * Support:
 * - Extended by library `crypto-browserify`
 * - Implemented aditional methods:
 *  - randomUUID (named exported only)
 * @module runtime-apis/nodejs/crypto/main
 * @example
 * // Execute with Azion Bundler:
 * npx edge-functions build
 * npx edge-functions dev
 */
import { createHmac, randomUUID } from "node:crypto";


/**
 * Example of using the Node.js Crypto API
 * @param {*} event
 * @returns
 */
const main = async (event) => {
  const hmac = createHmac("sha256", "a secret");
  hmac.update("Azion Functions");
  const hmacResult = hmac.digest("hex");
  console.log(hmacResult);
  // 5f2f3c2b9


  const uuid = randomUUID();
  console.log(uuid);
  // 1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4c1e


  return new Response(uuid, { status: 200 });
};


export default main;