;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016, 2017, 2018, 2020 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2016, 2017 Nikita <nikita@n0.is>
;;; Copyright © 2017, 2018, 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2017, 2018, 2019 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2017 Rutger Helling <rhelling@mykolab.com>
;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2020 Vincent Legoll <vincent.legoll@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix 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 GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages tor)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix git-download)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system python)
  #:use-module (gnu packages)
  #:use-module (gnu packages base)
  #:use-module (gnu packages libevent)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages check)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages pcre)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages python)
  #:use-module (gnu packages python-crypto)
  #:use-module (gnu packages python-web)
  #:use-module (gnu packages python-xyz)
  #:use-module (gnu packages qt)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages w3m))

(define-public tor
  (package
    (name "tor")
    (version "0.4.3.5")
    (source (origin
             (method url-fetch)
             (uri (string-append "https://dist.torproject.org/tor-"
                                 version ".tar.gz"))
             (sha256
              (base32
               "0s6qspi102drn1nk3gfxs51x992xarc44gkfsi8y3l48wr50wsk1"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags
       (list "--enable-lzma"
             "--enable-zstd")))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("python" ,python)))             ; for tests
    (inputs
     `(("libevent" ,libevent)
       ("libseccomp" ,libseccomp)
       ("openssl" ,openssl)
       ("xz" ,xz)
       ("zlib" ,zlib)
       ("zstd" ,zstd "lib")))
    (home-page "https://www.torproject.org/")
    (synopsis "Anonymous network router to improve privacy on the Internet")
    (description
     "Tor protects you by bouncing your communications around a distributed
network of relays run by volunteers all around the world: it prevents
somebody watching your Internet connection from learning what sites you
visit, and it prevents the sites you visit from learning your physical
location.  Tor works with many of your existing applications, including
web browsers, instant messaging clients, remote login, and other
applications based on the TCP protocol.

To @code{torify} applications (to take measures to ensure that an application,
which has not been designed for use with Tor such as ssh, will use only Tor for
internet connectivity, and also ensures that there are no leaks from DNS, UDP or
the application layer) you need to install @code{torsocks}.")
    (license license:bsd-3)))

(define-public torsocks
  (package
    (name "torsocks")
    (version "2.3.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://people.torproject.org/~dgoulet/"
                                  "torsocks/torsocks-" version ".tar.xz"))
              (sha256
               (base32
                "08inrkap29gikb6sdmb58z43hw4abwrfw7ny40c4xzdkss0vkwdr"))))
    (build-system gnu-build-system)
    (inputs
     `(("libcap" ,libcap)))
    (arguments
     `(#:phases (modify-phases %standard-phases
                  (add-after 'build 'absolutize
                    (lambda* (#:key inputs #:allow-other-keys)
                      (substitute* "src/bin/torsocks"
                        (("getcap=.*")
                         (string-append "getcap=" (which "getcap") "\n")))
                      #t)))))
    (home-page "https://www.torproject.org/")
    (synopsis "Use socks-friendly applications with Tor")
    (description
     "Torsocks allows you to use most socks-friendly applications in a safe
way with Tor.  It ensures that DNS requests are handled safely and explicitly
rejects UDP traffic from the application you're using.")

    ;; All the files explicitly say "version 2 only".
    (license license:gpl2)))

(define-public privoxy
  (package
    (name "privoxy")
    (version "3.0.28")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://sourceforge/ijbswa/Sources/"
                                 version "%20%28stable%29/privoxy-"
                                 version "-stable-src.tar.gz"))
             (sha256
              (base32
               "0jl2yav1qzqnaqnnx8i6i53ayckkimcrs3l6ryvv7bda6v08rmxm"))))
    (build-system gnu-build-system)
    (arguments
     '(;; The default 'sysconfdir' is $out/etc; change that to
       ;; $out/etc/privoxy.
       #:configure-flags (list (string-append "--sysconfdir="
                                              (assoc-ref %outputs "out")
                                              "/etc/privoxy"))
       #:tests? #f))
    (inputs
     `(("w3m" ,w3m)
       ("pcre" ,pcre)
       ("zlib" ,zlib)))
    (native-inputs
     `(("autoconf" ,autoconf)
       ("automake" ,automake)))
    (home-page "https://www.privoxy.org")
    (synopsis "Web proxy with advanced filtering capabilities for enhancing privacy")
    (description
     "Privoxy is a non-caching web proxy with advanced filtering capabilities
for enhancing privacy, modifying web page data and HTTP headers, controlling
access, and removing ads and other obnoxious Internet junk.  Privoxy has a
flexible configuration and can be customized to suit individual needs and
tastes.  It has application for both stand-alone systems and multi-user
networks.")
    (license license:gpl2+)))

(define-public onionshare
  (package
    (name "onionshare")
    (version "2.2")
    (source
      (origin
        (method git-fetch)
        (uri (git-reference
              (url "https://github.com/micahflee/onionshare.git")
              (commit (string-append "v" version))))
        (file-name (git-file-name name version))
        (sha256
         (base32 "0m8ygxcyp3nfzzhxs2dfnpqwh1vx0aws44lszpnnczz4fks3a5j4"))))
    (build-system python-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'fix-install-path
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out        (assoc-ref outputs "out"))
                    (onionshare (string-append out "/share/onionshare")))
               (substitute* '("setup.py" "onionshare/common.py")
                 (("sys.prefix,") (string-append "'" out "',")))
               (substitute* "setup.py"
                 ;; For the nautilus plugin.
                 (("/usr/share/nautilus") "share/nautilus"))
               (substitute* "install/org.onionshare.OnionShare.desktop"
                 (("/usr") out))
               #t)))
         (delete 'check)
         (add-before 'strip 'check
           ;; After all the patching we run the tests after installing.
           (lambda _
             (setenv "HOME" "/tmp")     ; Some tests need a writable homedir
             (invoke "pytest" "tests/")
             #t)))))
    (native-inputs
     `(("python-pytest" ,python-pytest)))
    (inputs
     `(("python-pycrypto" ,python-pycrypto)
       ("python-flask" ,python-flask)
       ("python-flask-httpauth" ,python-flask-httpauth)
       ("python-nautilus" ,python-nautilus)
       ("python-sip" ,python-sip)
       ("python-stem" ,python-stem)
       ("python-pysocks" ,python-pysocks)
       ("python-pyqt" ,python-pyqt)))
    (home-page "https://onionshare.org/")
    (synopsis "Securely and anonymously share files")
    (description "OnionShare is a tool for securely and anonymously sending
and receiving files using Tor onion services.  It works by starting a web
server directly on your computer and making it accessible as an unguessable
Tor web address that others can load in a Tor-enabled web browser to download
files from you, or upload files to you.  It doesn't require setting up a
separate server, using a third party file-sharing service, or even logging
into an account.")
    ;; Bundled, minified jquery is expat licensed.
    (license (list license:gpl3+ license:expat))))

(define-public nyx
  (package
    (name "nyx")
    (version "2.1.0")
    (source
     (origin
       (method url-fetch)
       (uri (pypi-uri name version))
       (sha256
        (base32
         "02rrlllz2ci6i6cs3iddyfns7ang9a54jrlygd2jw1f9s6418ll8"))))
    (build-system python-build-system)
    (inputs
     `(("python-stem" ,python-stem)))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'install 'install-man-page
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (man (string-append out "/share/man")))
               (install-file "nyx.1" (string-append man "/man1"))
               #t)))
         (add-after 'install 'install-sample-configuration
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (doc (string-append out "/share/doc/" ,name "-" ,version)))
               (install-file "web/nyxrc.sample" doc)
               #t))))
       ;; XXX The tests seem to require more of a real terminal than the build
       ;; environment provides:
       ;;   _curses.error: setupterm: could not find terminal
       ;; With TERM=linux, the tests try to move the cursor and still fail:
       ;;   _curses.error: cbreak() returned ERR
       #:tests? #f))
    (home-page "https://nyx.torproject.org/")
    (synopsis "Tor relay status monitor")
    (description
     "Nyx monitors the performance of relays participating in the
@uref{https://www.torproject.org/, Tor anonymity network}.  It displays this
information visually and in real time, using a curses-based terminal interface.
This makes Nyx well-suited for remote shell connections and servers without a
graphical display.  It's like @command{top} for Tor, providing detailed
statistics and status reports on:

@enumerate
@item connections (with IP address, hostname, fingerprint, and consensus data),
@item bandwidth, processor, and memory usage,
@item the relay's current configuration,
@item logged events,
@item and much more.
@end enumerate

Potential client and exit connections are scrubbed of sensitive information.")
    (license license:gpl3+)))
