The Purple Onion Router

An implementation of the [Tor Onion Router] tor on Mono/.NET.

PurpleOnion binaries and sources are licensed under a BSD-style license. For more information, see the LICENSE file.

Support for receiving certain terminating signals and exiting cleanly is automatically enabled in long-running applications on POSIX machines where Mono.Posix is available. These applications should still behave and JIT cleanly even when run on non-POSIX hosts, though applications will not be able to receive signals.

When POSIX signal handling is enabled, background threads will be allowed to complete their queued up work before terminating. Currently, SIGHUP, SIGTERM, and SIGINT are processed as requests to exit. Since all background threads are allowed to exit cleanly, a high numbers of workers may allow the program to continue running for a few seconds while the remaining worker threads finish processing.

Receiving a SIGKILL signal will immediately cause execution to cease; this signal cannot be caught or handled.

Applications can be run using the Mono framework by calling the executable prefixed with mono as in:

mono Por.Application.exe [arguments]

When running on a Windows machine using the .NET framework, the executable can be called directly without prefixing the runtime:

Por.Application.exe [arguments]

Currently the only fully implemented module in the PurpleOnion package, the OnionGenerator is a program that facilitates the brute-force generation of vanity hidden service, or .onion, addresses.

PurpleOnion requires at least Mono 2.0 to compile and run. The compiled binary will run on the .NET 2.0 framework with the appropriate libraries available (including Mono.Security).

The main development takes place in MonoDevelop with PurpleOnion.sln as the root solution. All projects can be compiled within MonoDevelop, or by running mdtool:

mdtool build PurpleOnion.sln

Makefiles are also generally kept up to date as well. In order to compile from the make files, use the standard:

./configure && make

Unless otherwise noted, PurpleOnion chooses to follow the design guidelines set forth in [Framework Design Guidelines, Second Edition] fdg2e by Cwalina and Abrams.

PurpleOnion consumes the Por namespace which is an acronym for "Purple Onion Router". Only the initial letter is capitalized in keeping with initialism-namespace standards.

Contributors to this project are self-identified by their commit history and by self-attribution in the AUTHORS file.

This project uses transcluded code from the Mono.Options project, as part of the Mono project and in accordance with the [Guidelines for Application Deployment] mono-gad to permit simple access for reuse, as licensed under the MIT/X11 license:

Copyright (C) 2008 Novell (http://www.novell.com)

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permit persons to whom the Software is furnished to do so, subject to
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The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

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