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#include "ext_packet.h"

extern "C"
{
#include "vli.h"
}

QByteArray serializeIdent(const Ident &m)
{
  QByteArray msg;
  msg.reserve(3);
  msg.append((char)ExMsgType::ident);
  msg.append('\0');
  msg.append(m.version);
  return msg;
}

QByteArray serializeAuthRequest(const AuthRequest &m)
{
  QByteArray msg;
  const QByteArray username = m.username.toUtf8();
  uint8_t method[sizeof(quint32) + 1];
  uint8_t ulen[sizeof(quint32) + 1];
  size_t method_n = vli32_encode(method, (quint32)m.method);
  size_t ulen_n = vli32_encode(ulen, username.size());
  msg.reserve(2 + ulen_n + username.size() + method_n);
  msg.append((char)ExMsgType::auth_request);
  msg.append('\0');
  msg.append((const char *)ulen, ulen_n);
  msg.append(username, username.size());
  msg.append((const char *)method, method_n);
  return msg;
}

QByteArray serializeAuthResponse(const AuthResponse &m)
{
  QByteArray msg;
  msg.reserve(2 + m.response.size());
  msg.append((char)ExMsgType::auth_response);
  msg.append('\0');
  msg.append(m.response);
  return msg;
}

bool parseAuthChallenge(QByteArrayView in, AuthChallenge &out)
{
  if (in.size() < 1 + 32)
  {
    return false;
  }
  out.challenge = QByteArray(in.constData() + 1, 32);
  return true;
}