Proxomitron.rar

############################################# Proxomitron Version Naoko 4.5 (C) 1999-2003 Scott R. Lemmon ############################################# WHAT'S NEW IN VERSION NAOKO-4.5: Please see the Changes.txt file for details on what's been added since version Naoko 4.4. NEW USERS: If this is the first time you've used Proxomitron, be sure to read the "Installation and Eradication" section of the help file. You'll need to follow those instructions to get Proxomitron working with your browser. LICENSE: Proxomitron is copyrighted 1999-2003 by Scott R. Lemmon Proxomitron is "Shonenware", and if free for personal use. You can use the program as often as you like for as long as you like. You are under no restriction to stop using it after so many days, or indeed ever! You can also, of course, freely copy it as long as you abide by certain conditions (see the license.html file for full details). ** USE PROXOMITRON AT YOUR OWN RISK! ** I believe the Proxomitron to be a safe and useful application, but I can make no guarantee that it will work properly (or at all), or that some unforeseen bug won't inadvertently cause damage, compromise your system, or even wake Godzilla. This software is provided "AS IS" and without any warranty or condition, express, implied or statutory. In no event will the authors be held liable for any damages arising from the use of this software. Only use it if you agree to these terms! DISTRIBUTION: I retain all right to the program, but freely authorize the distribution of copies of this version as long as... 1. no fee is charged for the program except to cover the basic distribution costs of media and shipping (not to exceed $5.00 US), 2. the program and all associated files are only distributed in their original archive and are not altered in any way, 3. it is not included as part of another commercial product, 4. absolutely no bison are harmed in the distribution process. ^_^ This product may be included in any software collection downloadable through electronic means (including web sites, FTP sites, and Bulletin Board Systems) as long as no fee is charged to gain access to or download this product. For inclusion of this product with a commercial product, or inclusion on compilation CD ROMs or other media sold for profit, permission must be gotten first. Please contact me at the following email address: slemmon@proxomitron.cjb.net ## SSL Support ## Proxomitron now supports SSL (secure https) connections. This comes in two flavors - SSLeay mode and pass-thru mode. The HTTP options under the "settings" dialog control which is used by default. SSLeay/OpenSSL mode ------------------- In this mode Proxomitron decrypt incoming data, filters it, then re-encrypts it before sending it on. This allows for nearly transparent filtering and full control over https connections. This feat is accomplished using the very nice Open Source SSLeay/OpenSSL libraries (not included - see below). ** WARNING ** This mode is experimental! I would strongly discourage using active SSL filtering for important transactions such as on-line banking or purchases. The connection may not be as secure, and it's better not to risk a filter potentially creating troubles on such a page. However, since the casual use of SSL on less important pages is increasing, sometimes you may wish to filter it anyway. Still, keep in mind that you do so at your own risk. To use this mode Proxomitron must have access to "slleay32.dll" and "libeay32.dll" which contain all the SSL libraries and all cryptographic routines. Otherwise "Pass-Thru" mode will be used. Because of all the legal and patent problems involved in the USA with any program that uses encryption, Proxomitron comes with NO ENCRYPTION CODE WHATSOEVER. In order to filter SSL connection you must get a copy of two additional files - "slleay32.dll" and "libeay32.dll". These files are part of the SSLeay/OpenSSL library and contain all the needed routines to do SSL encryption and decryption. In order to work they should be relatively recent versions (this has recently been updated by me) and must be complied with all algorithms needed for https. I know it's a pain but it's the only safe way I know to offer SSL support. Here's a few sources of working DLL files at the time of this writing... Shining Light Productions is now offering a Windows compile of OpenSSL Other Win32 compiles of OpenSSL may work too. http://www.shininglightpro.com/index.php?treeloc=35 The Off-By-One browser also includes these DLLs in it's zip file (and is also a small download, under 1 meg). http://homepagesw.com/images/OffByOne.zip NOTE: If anyone wishes to mirror these files and is located somewhere legally able to do so please let me know. OpenSSL is developed by the OpenSSL Project for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/) which includes cryptographic software written by Eric Young (eay@cryptsoft.com). and includes software written by Tim Hudson (tjh@cryptsoft.com). (See openssl.txt for the full license) Server Certificates And Such ---------------------------- There are some other limitations to SSL filtering. In order for Proxomitron to act as a SSL server it must have a "certificate". Certificates are used by web servers to identify themselves to your web browser. They must be digitally "signed" by a known company like VeriSign or your browser will generate a warning. Proxomitron's certificate is located in the "proxcert.pem" file. It's a self-signed certificate created using SSLeay (if you're familiar with SSLeay you could create a certificate of your own). As such it should *not* be considered secure. However it's only used for the connection between Proxomitron and your web browser - the connection between Proxomitron and the remote site relies on the site's certificate not Proxomitron's. Normally the local connection to your browser never passes outside your PC, so its security isn't really an issue. In fact, the only reason to encrypt it at all is to make your browser think it's connecting directly to a secure site. This does have a few drawbacks though. When you first visit a secure site being filtered through Proxomitron, your browser will usually issue a warning. This happens for two reasons. First Proxomitron's certificate won't initially be recognized by your browser (normally you'll be allowed to add it though). Secondly, Proxomitron's certificate will not match the name of the site your visiting (since it can't know that ahead of time). Unfortunately (or perhaps fortunately) these warning are unavoidable since SSL was intentionally designed to prevent an intermediary from secretly intercepting your data. Proxomitron *is* intercepting your data, but under your control. One way around this is to use a sort of "half-SSL" technique. Proxomitron lets you specify in a normal non-secure "http://" URL that you want to make a SSL connection to the actual web server - just write the URL like so... Original: https://some.secure.site.com/ New : http://https..some.secure.site.com/ Change the protocol back to "http://" then add "https.." to the front of the hostname. This make it so the connection between your browser and Proxomitron is not encrypted but the connection from Proxomitron to the final server is! Since the local connection to Proxomitron is usually confined to your PC alone, this is really no less secure. However your browser thinks it's got a normal insecure connection and won't do any certificate checks. This can also be used to access secure pages from browsers that may not have https support at all. NEW: Proxomitron now can check to make sure the certificate on the remote server is valid. It looks for a file named "certs.pem" in th