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ext_dep/libvncserver/libvncserver-master/libvncclient/tls.h 1.97 KB
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  #ifndef TLS_H
  #define TLS_H
  
  /*
   *  Copyright (C) 2009 Vic Lee.
   *
   *  This is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This software is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this software; if not, write to the Free Software
   *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
   *  USA.
   */
  
  /* Handle Anonymous TLS Authentication (18) with the server.
   * After authentication, client->tlsSession will be set.
   */
  rfbBool HandleAnonTLSAuth(rfbClient* client);
  
  /* Handle VeNCrypt Authentication (19) with the server.
   * The callback function GetX509Credential will be called.
   * After authentication, client->tlsSession will be set.
   */
  rfbBool HandleVeNCryptAuth(rfbClient* client);
  
  /* Read desired bytes from TLS session.
   * It's a wrapper function over gnutls_record_recv() and return values
   * are same as read(), that is, >0 for actual bytes read, 0 for EOF,
   * or EAGAIN, EINTR.
   * This should be a non-blocking call. Blocking is handled in sockets.c.
   */
  int ReadFromTLS(rfbClient* client, char *out, unsigned int n);
  
  /* Write desired bytes to TLS session.
   * It's a wrapper function over gnutls_record_send() and it will be
   * blocking call, until all bytes are written or error returned.
   */
  int WriteToTLS(rfbClient* client, const char *buf, unsigned int n);
  
  /* Free TLS resources */
  void FreeTLS(rfbClient* client);
  
  #ifdef LIBVNCSERVER_HAVE_SASL
  /* Get the number of bits in the current cipher */
  int GetTLSCipherBits(rfbClient* client);
  #endif /* LIBVNCSERVER_HAVE_SASL */
  
  #endif /* TLS_H */