Function makeSignature

wxapp/wps.js:150–160

(data, config = {})

}

function makeSignature(data, config = {}) {
  const key = config.key || "";
  const ss = config.ss || "";
  if (!key || !ss) return {};
  const date = new Date().toUTCString();
  const payload = `${key}${md5(canonicalJson(data))}${date}`;
  return {
    Date: date,
    Signature: hmacSha256Hex(payload, ss),
  };
}

function randomHex(bytes = 16) {
  return crypto.randomBytes(bytes).toString("hex");