Method isPrekeySignatureValid

native/cpp/CommonCpp/CryptoTools/CryptoModule.cpp:110–132

}

bool CryptoModule::isPrekeySignatureValid() {
  try {
    const std::string signingPublicKey =
        getSigningPublicKey(this->getIdentityKeys());

    const std::string prekey = this->getPrekey();
    const std::string prekeySignature = this->getPrekeySignature();

    // Use the dedicated prekey verification function that decodes base64
    ::verify_prekey_signature(signingPublicKey, prekey, prekeySignature);
    return true;
  } catch (const std::exception &e) {
    std::string rawMessage{e.what()};
    if (rawMessage.find("The signature was invalid") != std::string::npos) {
      return false;
    }

    std::string errorMessage{
        "prekey signature verification failed with: " + rawMessage};
    Logger::log(errorMessage);
    throw std::runtime_error(errorMessage);
  }
}

std::string CryptoModule::getIdentityKeys() {
  this->exposePublicIdentityKeys();