Function signEc

wxapp/wps.js:184–191

(privateKey, text)

}

function signEc(privateKey, text) {
  return crypto
    .sign("sha256", Buffer.from(String(text)), {
      key: privateKey.export({ type: "pkcs8", format: "pem" }),
      dsaEncoding: "der",
    })
    .toString("base64url");
}

function deriveSecret(privateKey, serverJwkB64) {
  const jwk = JSON.parse(Buffer.from(serverJwkB64, "base64url").toString("utf8"));