sign

import { crypto } from "k6/experimental/webcrypto";

export default async function () {
  const generatedKey = await crypto.subtle.generateKey(
    {
      name: "HMAC",
      hash: { name: "SHA-1" },
    },
    true,
    [
      "sign",
      "verify",
    ]
  );

  const data = string2ArrayBuffer("Hello World");

  /**
   * Signes the encoded data with the provided key using the HMAC algorithm
   * the returned signature can be verified using the verify method.
   */
  const signature = await crypto.subtle.sign("HMAC", generatedKey, data);

  /**
   * Verifies the signature of the encoded data with the provided key using the HMAC algorithm.
   */
  const verified = await crypto.subtle.verify("HMAC", generatedKey, signature, data);

  console.log("verified: ", verified)
}

function string2ArrayBuffer(str) {
  const buf = new ArrayBuffer(str.length * 2); // 2 bytes for each char
  const bufView = new Uint16Array(buf);
  for (let i = 0, strLen = str.length; i < strLen; i++) {
      bufView[i] = str.charCodeAt(i);
  }
  return buf;
}