Method validatePrekey

native/cpp/CommonCpp/CryptoTools/CryptoModule.cpp:372–395

}

std::optional<std::string> CryptoModule::validatePrekey() {
  static const uint64_t maxPrekeyPublishTime = 30 * 24 * 60 * 60; // 30 days
  static const uint64_t maxOldPrekeyAge = 24 * 60 * 60;           // 24 hours
  std::optional<std::string> maybeNewPrekey;

  bool prekeyDoesntExist = this->prekeyDoesntExist();
  bool prekeySignatureValid = this->isPrekeySignatureValid();
  if (prekeyDoesntExist || !prekeySignatureValid) {
    return this->generateAndGetPrekey();
  }

  bool shouldRotatePrekey =
      this->prekeyExistsAndOlderThan(maxPrekeyPublishTime);
  if (shouldRotatePrekey) {
    maybeNewPrekey = this->generateAndGetPrekey();
  }

  bool shouldForgetPrekey = this->prekeyExistsAndOlderThan(maxOldPrekeyAge);
  if (shouldForgetPrekey) {
    this->forgetOldPrekey();
  }

  return maybeNewPrekey;
}

} // namespace crypto
} // namespace comm