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common/rfb/Security.h

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+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * 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.
+ */
+//
+// secTypes.h - constants for the various security types.
+//
+
+#ifndef __RFB_SECTYPES_H__
+#define __RFB_SECTYPES_H__
+
+#include <rdr/types.h>
+#include <rfb/Configuration.h>
+#include <rfb/CSecurity.h>
+
+#include <list>
+
+namespace rfb {
+  const rdr::U8 secTypeInvalid = 0;
+  const rdr::U8 secTypeNone    = 1;
+  const rdr::U8 secTypeVncAuth = 2;
+
+  const rdr::U8 secTypeRA2     = 5;
+  const rdr::U8 secTypeRA2ne   = 6;
+
+  const rdr::U8 secTypeSSPI    = 7;
+  const rdr::U8 secTypeSSPIne  = 8;
+
+  const rdr::U8 secTypeTight   = 16;
+  const rdr::U8 secTypeUltra   = 17;
+  const rdr::U8 secTypeTLS     = 18;
+  const rdr::U8 secTypeVeNCrypt= 19;
+
+  /* VeNCrypt subtypes */
+  const int secTypePlain       = 256;
+  const int secTypeTLSNone     = 257;
+  const int secTypeTLSVnc      = 258;
+  const int secTypeTLSPlain    = 259;
+  const int secTypeX509None    = 260;
+  const int secTypeX509Vnc     = 261;
+  const int secTypeX509Plain   = 262;
+
+  // result types
+
+  const rdr::U32 secResultOK = 0;
+  const rdr::U32 secResultFailed = 1;
+  const rdr::U32 secResultTooMany = 2; // deprecated
+
+  class Security {
+  public:
+    /*
+     * Create Security instance.
+     */
+    Security();
+    Security(StringParameter &secTypes);
+
+    /*
+     * Note about security types.
+     *
+     * Although RFB protocol specifies security types as U8 values,
+     * we map VeNCrypt subtypes (U32) into the standard security types
+     * to simplify user configuration. With this mapping user can configure
+     * both VeNCrypt subtypes and security types with only one option.
+     */
+
+    /* Enable/Disable certain security type */
+    void EnableSecType(rdr::U32 secType);
+    void DisableSecType(rdr::U32 secType) { enabledSecTypes.remove(secType); }
+
+    void SetSecTypes(std::list<rdr::U32> &secTypes) { enabledSecTypes = secTypes; }
+
+    /* Check if certain type is supported */
+    bool IsSupported(rdr::U32 secType);
+
+    /* Get list of enabled security types without VeNCrypt subtypes */
+    const std::list<rdr::U8> GetEnabledSecTypes(void);
+    /* Get list of enabled VeNCrypt subtypes */
+    const std::list<rdr::U32> GetEnabledExtSecTypes(void);
+
+    /* Output char* is stored in static array */
+    char *ToString(void);
+
+#ifdef HAVE_GNUTLS
+    static StringParameter GnuTLSPriority;
+#endif
+
+  private:
+    std::list<rdr::U32> enabledSecTypes;
+  };
+
+  const char* secTypeName(rdr::U32 num);
+  rdr::U32 secTypeNum(const char* name);
+  std::list<rdr::U32> parseSecTypes(const char* types);
+}
+
+#endif