AESV3PluginMT - ARC4V3PluginMT MultiThreaded DSM Encryption

[redge]

/////////////////////////////////////////////////////////////////////////////
// AESV3PluginMT - AES V3 Plugin MT
// ARC4V3PluginMT - ARC4 V3 Plugin MT
//
// Threadsafe 128-bit AES / ARC4 encryption UltraVNC DSM plugins
// Adam D. Walling 2009
//
///////////////////////////////////////////////////////////////////////////////
//
// Please see the author's latest VNC DSM Plugin, SecureVNC, which provides
// simple, effective, secure VNC sessions, without requiring a pre-shared
// key or password! These plugins will no longer be further developed except
// possibly for severe bugs, so give SecureVNCa shot!
//
////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2005 Ultr@Vnc. All Rights Reserved.
// Copyright (C) 1998-2002 The OpenSSL Project. All rights reserved.
// Copyright (C) 2005 Sean E. Covel. All Rights Reserved.
// Copyright (C) 2009 Adam D. Walling aka Adzm. All Rights Reserved.
//
// This product includes software developed by the OpenSSL Project for use
// in the OpenSSL Toolkit ( http://openssl.org )
//
// Initial AES plugin created by Sean E. Covel
// based on UltraVNC's excellent TestPlugin project.
//
// (2009)
// Multithreaded DSM plugin framework created by Adam D. Walling
// AES plugin migrated to new multithreaded framework by Adam D. Walling.
// Backwards-compatible with existing DSM interface.
//
////////////////////////////////////////////////////////////////////////////
//
// This program 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.
//
// UltraVNC - http://ultravnc.sourceforge.net/
// OpenSSL - http://openssl.org
// Sean E. Covel - http://home.comcast.net/~msrc4plugin
// - mailto:msrc4plugin@comcast.net
// Adam D. Walling aka Adzm - http://adamwalling.com
// - mailto:adam.walling@gmail.com
//
////////////////////////////////////////////////////////////////////////////
//
// AES V3 Plugin 3.0.1.8
// ARC4 V3 Plugin 3.0.1.8
//
// CipherV3PluginMT 3.0.1.8 Source
// - Built with Visual Studio 2008
// - Statically-linked with OpenSSL 0.9.8k
//
////////////////////////////////////////////////////////////////////////////
//
// Please see the author's latest VNC DSM Plugin, SecureVNC, which provides
// simple, effective, secure VNC sessions, without requiring a pre-shared
// key or password! These plugins will no longer be further developed except
// possibly for severe bugs, so give SecureVNC a shot!
//
////////////////////////////////////////////////////////////////////////////
//
// Behavior is the same as Sean E. Covel's original AES DSM plugin for
// UltraVNC. Contains several bugfixes, and a new interface and architecture
// for threadsafe encryption and decryption. This allows multiple encrypted
// viewers in UltraVNC servers. Code changes were required in the server to
// support this new approach, which is not yet available in a public build.
// This plugin is backwards-compatible, however, and can be used with all
// existing builds of the UltraVNC viewer and server that support the
// original DSM plugin standard.
//
// A 16-byte keyfile is searched for in the plugin directory, the parent
// process directory, the %PROGRAMFILES%\UltraVNC directory, the
// %PROGRAMFILES%\UltraVNC\Plugins directory, and finally the current
// directory. If not found, you should be prompted for a password. The
// password or keyfile is salted and hashed to create the initial key. Any
// file matching the pattern AES*.key or RC4*.key will be chosen. You may
// specify the environment variable AESV3PLUGINKEY or AESPLUGINKEY
// (or ARC4V3PLUGINKEY or ARC4PLUGINKEY if using the ARC4 version) to point
// directly to the keyfile; this will be checked before the paths above.
//
// Please contact me with any problems.
//
// Adam
//
////////////////////////////////////////////////////////////////////////////
//
// 3.0.1.8
// - Added ARC4 build
// - Several minor fixes for legacy support
//
// 3.0.1.7
// - Initial release candidate
//
////////////////////////////////////////////////////////////////////////////