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  #ifndef QSSLKEY_OPENSSL_P_H
  #define QSSLKEY_OPENSSL_P_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists for the convenience
  // of qsslcertificate.cpp.  This header file may change from version to version
  // without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include <QtNetwork/private/qtnetworkglobal_p.h>
  #include "qsslkey.h"
  #include "qsslsocket_p.h" // includes wincrypt.h
  
  #ifndef QT_NO_OPENSSL
  #include <openssl/rsa.h>
  #include <openssl/dsa.h>
  #endif
  
  QT_BEGIN_NAMESPACE
  
  class QSslKeyPrivate
  {
  public:
      inline QSslKeyPrivate()
          : algorithm(QSsl::Opaque)
          , opaque(nullptr)
      {
          clear(false);
      }
  
      inline ~QSslKeyPrivate()
      { clear(); }
  
      void clear(bool deep = true);
  
  #ifndef QT_NO_OPENSSL
      bool fromEVP_PKEY(EVP_PKEY *pkey);
  #endif
      void decodeDer(const QByteArray &der, const QByteArray &passPhrase = {}, bool deepClear = true);
      void decodePem(const QByteArray &pem, const QByteArray &passPhrase, bool deepClear = true);
      QByteArray pemHeader() const;
      QByteArray pemFooter() const;
      QByteArray pemFromDer(const QByteArray &der, const QMap<QByteArray, QByteArray> &headers) const;
      QByteArray derFromPem(const QByteArray &pem, QMap<QByteArray, QByteArray> *headers) const;
  
      int length() const;
      QByteArray toPem(const QByteArray &passPhrase) const;
      Qt::HANDLE handle() const;
  
      bool isEncryptedPkcs8(const QByteArray &der) const;
  #if !QT_CONFIG(openssl)
      QByteArray decryptPkcs8(const QByteArray &encrypted, const QByteArray &passPhrase);
      bool isPkcs8 = false;
  #endif
  
      bool isNull;
      QSsl::KeyType type;
      QSsl::KeyAlgorithm algorithm;
  
      enum Cipher {
          DesCbc,
          DesEde3Cbc,
          Rc2Cbc,
          Aes128Cbc,
          Aes192Cbc,
          Aes256Cbc
      };
  
      Q_AUTOTEST_EXPORT static QByteArray decrypt(Cipher cipher, const QByteArray &data, const QByteArray &key, const QByteArray &iv);
      Q_AUTOTEST_EXPORT static QByteArray encrypt(Cipher cipher, const QByteArray &data, const QByteArray &key, const QByteArray &iv);
  
  #ifndef QT_NO_OPENSSL
      union {
          EVP_PKEY *opaque;
          RSA *rsa;
          DSA *dsa;
          DH *dh;
  #ifndef OPENSSL_NO_EC
          EC_KEY *ec;
  #endif
      };
  #else
      Qt::HANDLE opaque;
      QByteArray derData;
      int keyLength;
  #endif
  
      QAtomicInt ref;
  
  private:
      Q_DISABLE_COPY_MOVE(QSslKeyPrivate)
  };
  
  QT_END_NAMESPACE
  
  #endif // QSSLKEY_OPENSSL_P_H
  