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29 <h1 class="SECT1"><a name="COPYRIGHT">12. Privoxy Copyright, License and History</a></h1>
30 <p>Copyright © 2001-2020 by Privoxy Developers <code class="EMAIL"><<a href=
31 "mailto:privoxy-devel@lists.privoxy.org">privoxy-devel@lists.privoxy.org</a>></code></p>
32 <p>Some source code is based on code Copyright © 1997 by Anonymous Coders and Junkbusters, Inc. and licensed
33 under the <i class="CITETITLE">GNU General Public License</i>.</p>
34 <p><span class="APPLICATION">Privoxy</span> is free software; you can redistribute and/or modify its source code
35 under the terms of the <i class="CITETITLE">GNU General Public License</i> as published by the Free Software
36 Foundation, either version 2 of the license, or (at your option) any later version.</p>
37 <p>The same is true for <span class="APPLICATION">Privoxy</span> binaries unless they are linked with a <a href=
38 "https://tls.mbed.org/" target="_top">mbed TLS</a> version that is licensed under the Apache 2.0 license in which
39 case you can redistribute and/or modify the <span class="APPLICATION">Privoxy</span> binaries under the terms of
40 the <i class="CITETITLE">GNU General Public License</i> as published by the Free Software Foundation, either
41 version 3 of the license, or (at your option) any later version.</p>
42 <p>Both licenses are included in the next section.</p>
44 <h2 class="SECT2"><a name="LICENSE">12.1. License</a></h2>
46 <h3 class="SECT3"><a name="GPLV2">12.1.1. GNU General Public License version 2</a></h3>
47 <table border="0" bgcolor="#E0E0E0" width="100%">
50 <pre class="SCREEN"> GNU GENERAL PUBLIC LICENSE
53 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
54 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
55 Everyone is permitted to copy and distribute verbatim copies
56 of this license document, but changing it is not allowed.
60 The licenses for most software are designed to take away your
61 freedom to share and change it. By contrast, the GNU General Public
62 License is intended to guarantee your freedom to share and change free
63 software--to make sure the software is free for all its users. This
64 General Public License applies to most of the Free Software
65 Foundation's software and to any other program whose authors commit to
66 using it. (Some other Free Software Foundation software is covered by
67 the GNU Lesser General Public License instead.) You can apply it to
70 When we speak of free software, we are referring to freedom, not
71 price. Our General Public Licenses are designed to make sure that you
72 have the freedom to distribute copies of free software (and charge for
73 this service if you wish), that you receive source code or can get it
74 if you want it, that you can change the software or use pieces of it
75 in new free programs; and that you know you can do these things.
77 To protect your rights, we need to make restrictions that forbid
78 anyone to deny you these rights or to ask you to surrender the rights.
79 These restrictions translate to certain responsibilities for you if you
80 distribute copies of the software, or if you modify it.
82 For example, if you distribute copies of such a program, whether
83 gratis or for a fee, you must give the recipients all the rights that
84 you have. You must make sure that they, too, receive or can get the
85 source code. And you must show them these terms so they know their
88 We protect your rights with two steps: (1) copyright the software, and
89 (2) offer you this license which gives you legal permission to copy,
90 distribute and/or modify the software.
92 Also, for each author's protection and ours, we want to make certain
93 that everyone understands that there is no warranty for this free
94 software. If the software is modified by someone else and passed on, we
95 want its recipients to know that what they have is not the original, so
96 that any problems introduced by others will not reflect on the original
99 Finally, any free program is threatened constantly by software
100 patents. We wish to avoid the danger that redistributors of a free
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102 program proprietary. To prevent this, we have made it clear that any
103 patent must be licensed for everyone's free use or not licensed at all.
105 The precise terms and conditions for copying, distribution and
108 GNU GENERAL PUBLIC LICENSE
109 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
111 0. This License applies to any program or other work which contains
112 a notice placed by the copyright holder saying it may be distributed
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126 Whether that is true depends on what the Program does.
128 1. You may copy and distribute verbatim copies of the Program's
129 source code as you receive it, in any medium, provided that you
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163 These requirements apply to the modified work as a whole. If
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320 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
321 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
322 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
323 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
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329 END OF TERMS AND CONDITIONS
331 How to Apply These Terms to Your New Programs
333 If you develop a new program, and you want it to be of the greatest
334 possible use to the public, the best way to achieve this is to make it
335 free software which everyone can redistribute and change under these terms.
337 To do so, attach the following notices to the program. It is safest
338 to attach them to the start of each source file to most effectively
339 convey the exclusion of warranty; and each file should have at least
340 the "copyright" line and a pointer to where the full notice is found.
342 <one line to give the program's name and a brief idea of what it does.>
343 Copyright (C) <year> <name of author>
345 This program is free software; you can redistribute it and/or modify
346 it under the terms of the GNU General Public License as published by
347 the Free Software Foundation; either version 2 of the License, or
348 (at your option) any later version.
350 This program is distributed in the hope that it will be useful,
351 but WITHOUT ANY WARRANTY; without even the implied warranty of
352 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
353 GNU General Public License for more details.
355 You should have received a copy of the GNU General Public License along
356 with this program; if not, write to the Free Software Foundation, Inc.,
357 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
359 Also add information on how to contact you by electronic and paper mail.
361 If the program is interactive, make it output a short notice like this
362 when it starts in an interactive mode:
364 Gnomovision version 69, Copyright (C) year name of author
365 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
366 This is free software, and you are welcome to redistribute it
367 under certain conditions; type `show c' for details.
369 The hypothetical commands `show w' and `show c' should show the appropriate
370 parts of the General Public License. Of course, the commands you use may
371 be called something other than `show w' and `show c'; they could even be
372 mouse-clicks or menu items--whatever suits your program.
374 You should also get your employer (if you work as a programmer) or your
375 school, if any, to sign a "copyright disclaimer" for the program, if
376 necessary. Here is a sample; alter the names:
378 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
379 `Gnomovision' (which makes passes at compilers) written by James Hacker.
381 <signature of Ty Coon>, 1 April 1989
382 Ty Coon, President of Vice
384 This General Public License does not permit incorporating your program into
385 proprietary programs. If your program is a subroutine library, you may
386 consider it more useful to permit linking proprietary applications with the
387 library. If this is what you want to do, use the GNU Lesser General
388 Public License instead of this License.
395 <h3 class="SECT3"><a name="GPLV3">12.1.2. GNU General Public License version 3</a></h3>
396 <table border="0" bgcolor="#E0E0E0" width="100%">
399 <pre class="SCREEN"> GNU GENERAL PUBLIC LICENSE
400 Version 3, 29 June 2007
402 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
403 Everyone is permitted to copy and distribute verbatim copies
404 of this license document, but changing it is not allowed.
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409 software and other kinds of works.
411 The licenses for most software and other practical works are designed
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413 the GNU General Public License is intended to guarantee your freedom to
414 share and change all versions of a program--to make sure it remains free
415 software for all its users. We, the Free Software Foundation, use the
416 GNU General Public License for most of our software; it applies also to
417 any other work released this way by its authors. You can apply it to
420 When we speak of free software, we are referring to freedom, not
421 price. Our General Public Licenses are designed to make sure that you
422 have the freedom to distribute copies of free software (and charge for
423 them if you wish), that you receive source code or can get it if you
424 want it, that you can change the software or use pieces of it in new
425 free programs, and that you know you can do these things.
427 To protect your rights, we need to prevent others from denying you
428 these rights or asking you to surrender the rights. Therefore, you have
429 certain responsibilities if you distribute copies of the software, or if
430 you modify it: responsibilities to respect the freedom of others.
432 For example, if you distribute copies of such a program, whether
433 gratis or for a fee, you must pass on to the recipients the same
434 freedoms that you received. You must make sure that they, too, receive
435 or can get the source code. And you must show them these terms so they
438 Developers that use the GNU GPL protect your rights with two steps:
439 (1) assert copyright on the software, and (2) offer you this License
440 giving you legal permission to copy, distribute and/or modify it.
442 For the developers' and authors' protection, the GPL clearly explains
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1021 How to Apply These Terms to Your New Programs
1023 If you develop a new program, and you want it to be of the greatest
1024 possible use to the public, the best way to achieve this is to make it
1025 free software which everyone can redistribute and change under these terms.
1027 To do so, attach the following notices to the program. It is safest
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1030 the "copyright" line and a pointer to where the full notice is found.
1032 <one line to give the program's name and a brief idea of what it does.>
1033 Copyright (C) <year> <name of author>
1035 This program is free software: you can redistribute it and/or modify
1036 it under the terms of the GNU General Public License as published by
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1038 (at your option) any later version.
1040 This program is distributed in the hope that it will be useful,
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1042 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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1045 You should have received a copy of the GNU General Public License
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1048 Also add information on how to contact you by electronic and paper mail.
1050 If the program does terminal interaction, make it output a short
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1053 <program> Copyright (C) <year> <name of author>
1054 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
1055 This is free software, and you are welcome to redistribute it
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1058 The hypothetical commands `show w' and `show c' should show the appropriate
1059 parts of the General Public License. Of course, your program's commands
1060 might be different; for a GUI interface, you would use an "about box".
1062 You should also get your employer (if you work as a programmer) or school,
1063 if any, to sign a "copyright disclaimer" for the program, if necessary.
1064 For more information on this, and how to apply and follow the GNU GPL, see
1065 <https://www.gnu.org/licenses/>.
1067 The GNU General Public License does not permit incorporating your program
1068 into proprietary programs. If your program is a subroutine library, you
1069 may consider it more useful to permit linking proprietary applications with
1070 the library. If this is what you want to do, use the GNU Lesser General
1071 Public License instead of this License. But first, please read
1072 <https://www.gnu.org/licenses/why-not-lgpl.html>.
1080 <h2 class="SECT2"><a name="HISTORY">12.2. History</a></h2>
1081 <p>A long time ago, there was the <span class="APPLICATION">Internet Junkbuster</span>, by Anonymous Coders and
1082 Junkbusters Corporation. This saved many users a lot of pain in the early days of web advertising and user
1084 <p>But the web, its protocols and standards, and with it, the techniques for forcing ads on users, give up
1085 autonomy over their browsing, and for tracking them, keeps evolving. Unfortunately, the <span class=
1086 "APPLICATION">Internet Junkbuster</span> did not. Version 2.0.2, published in 1998, was the last official
1087 release, available from Junkbusters Corporation. Fortunately, it had been released under the GNU <a href=
1088 "http://www.gnu.org/licenses/old-licenses/gpl-2.0.html" target="_top">GPL</a>, which allowed further development
1090 <p>So Stefan Waldherr started maintaining an improved version of the software, to which eventually a number of
1091 people contributed patches. It could already replace banners with a transparent image, and had a first version of
1092 pop-up killing, but it was still very closely based on the original, with all its limitations, such as the lack
1093 of HTTP/1.1 support, flexible per-site configuration, or content modification. The last release from this effort
1094 was version 2.0.2-10, published in 2000.</p>
1095 <p>Then, some <a href="https://www.privoxy.org/user-manual/copyright.html#AUTHORS" target="_top">developers</a>
1096 picked up the thread, and started turning the software inside out, upside down, and then reassembled it, adding
1097 many <a href="https://www.privoxy.org/user-manual/introduction.html#FEATURES" target="_top">new features</a>
1099 <p>The result of this is <span class="APPLICATION">Privoxy</span>, whose first stable version, 3.0, was released
1101 <p>As of 2012 the Junkbusters Corporation's website (http://www.junkbusters.com/) has been shut down, but Privoxy
1102 is still actively maintained.</p>
1105 <h2 class="SECT2"><a name="AUTHORS">12.3. Authors</a></h2>
1106 <p>Current Privoxy Team:</p>
1107 <p class="LITERALLAYOUT"> Fabian Keil, lead developer<br>
1108 David Schmidt<br>
1109 Lee Rian<br>
1110 Roland Rosenfeld<br>
1111 Ian Silvester</p>
1112 <p>Former Privoxy Team Members:</p>
1113 <p class="LITERALLAYOUT"> Johny Agotnes<br>
1114 Rodrigo Barbosa<br>
1115 Moritz Barsnick<br>
1116 Hal Burgiss<br>
1117 Ian Cummings<br>
1118 Brian Dessent<br>
1119 Jon Foster<br>
1120 Karsten Hopp<br>
1121 Alexander Lazic<br>
1122 Daniel Leite<br>
1123 Gábor Lipták<br>
1124 Adam Lock<br>
1125 Guy Laroche<br>
1126 Justin McMurtry<br>
1127 Mark Miller<br>
1128 Gerry Murphy<br>
1129 Andreas Oesterhelt<br>
1130 Haroon Rafique<br>
1131 Georg Sauthoff<br>
1132 Thomas Steudten<br>
1133 Jörg Strohmayer<br>
1134 Rodney Stromlund<br>
1135 Sviatoslav Sviridov<br>
1136 Sarantis Paskalis<br>
1137 Stefan Waldherr</p>
1138 <p>Thanks to the many people who have tested Privoxy, reported bugs, provided patches, made suggestions, donated
1139 or contributed in some other way. These include (in alphabetical order):</p>
1140 <p class="LITERALLAYOUT"> Rustam Abdullaev<br>
1141 Clint Adams<br>
1142 Maxim Antonov<br>
1143 Anatoly Arzhnikov<br>
1144 Ken Arromdee<br>
1145 Natxo Asenjo<br>
1146 Devin Bayer<br>
1147 Havard Berland<br>
1148 David Binderman<br>
1149 David Bo<br>
1150 Gergely Bor<br>
1151 Francois Botha<br>
1152 Reiner Buehl<br>
1153 Andrew J. Caines<br>
1154 Clifford Caoile<br>
1155 Edward Carrel<br>
1156 Pak Chan<br>
1157 Wan-Teh Chang<br>
1158 Sam Chen<br>
1159 Ramkumar Chinchani<br>
1160 Billy Crook<br>
1161 Frédéric Crozat<br>
1162 Matthew Daley<br>
1163 Michael T. Davis<br>
1164 Markus Dittrich<br>
1165 Mattes Dolak<br>
1166 Matthias Drochner<br>
1167 Peter E.<br>
1168 Florian Effenberger<br>
1169 Markus Elfring<br>
1170 Ryan Farmer<br>
1171 Matthew Fischer<br>
1172 Dean Gaudet<br>
1173 Stephen Gildea<br>
1174 John McGowan<br>
1175 Danny Goossen<br>
1176 Lizik Grelier<br>
1177 Daniel Griscom<br>
1178 Felix Gröbert<br>
1179 Bernard Guillot<br>
1180 Jeff H.<br>
1181 Tim H.<br>
1182 Aaron Hamid<br>
1183 Darel Henman<br>
1184 Magnus Holmgren<br>
1185 Eric M. Hopper<br>
1186 Ralf Horstmann<br>
1187 Ho+ Ho+ Ho+<br>
1188 Nedžad Hrnjica<br>
1189 Stefan Huehner<br>
1190 Basil Hussain<br>
1191 Peter Hyman<br>
1192 Derek Jennings<br>
1193 Andrew Jones<br>
1194 Julien Joubert<br>
1195 Ralf Jungblut<br>
1196 Petr Kadlec<br>
1197 Robert Klemme<br>
1198 Steven Kolins<br>
1200 Stefan Kurtz<br>
1201 Zeno Kugy<br>
1202 David Laight<br>
1203 Bert van Leeuwen<br>
1204 Don Libes<br>
1205 Paul Lieverse<br>
1206 Han Liu<br>
1207 Toby Lyward<br>
1208 Wil Mahan<br>
1209 Jindrich Makovicka<br>
1210 Raphael Marichez<br>
1211 Francois Marier<br>
1212 Angelina Matson<br>
1213 Jonathan McKenzie<br>
1214 David Mediavilla<br>
1215 Raphael Moll<br>
1216 J. Momberger<br>
1217 Mathew Murphy<br>
1218 Amuro Namie<br>
1219 Mark Nelson<br>
1220 Tobias Netzel<br>
1221 John Palkovic<br>
1222 Adam Piggott<br>
1223 Petr Písar<br>
1224 Dan Price<br>
1225 Roberto Ragusa<br>
1226 Félix Rauch<br>
1227 Kai Raven<br>
1228 Marvin Renich<br>
1229 Chris John Riley<br>
1230 Maynard Riley<br>
1231 Ivan Romanov<br>
1232 Andreas Rutkauskas<br>
1234 Bart Schelstraete<br>
1235 Gregory Seidman<br>
1236 Atman Sense<br>
1237 Chung-chieh Shan<br>
1238 Johan Sintorn<br>
1239 Benjamin C. Wiley Sittler<br>
1240 DRS David Soft<br>
1241 Simon South<br>
1242 Dan Stahlke<br>
1243 Oliver Stoeneberg<br>
1244 Václav Švec<br>
1245 Rick Sykes<br>
1246 Spinor S.<br>
1247 Peter Thoenen<br>
1248 Marc Thomas<br>
1249 Martin Thomas<br>
1250 Reuben Thomas<br>
1251 Guybrush Threepwood<br>
1252 Joel Verhagen<br>
1253 Bobby G. Vinyard<br>
1254 Jochen Voss<br>
1255 David Wagner<br>
1256 Glenn Washburn<br>
1257 Song Weijia<br>
1258 Jörg Weinmann<br>
1259 Darren Wiebe<br>
1260 Anduin Withers<br>
1261 withoutname<br>
1262 Eduard Wulff<br>
1263 Yang Xia<br>
1264 Jarry Xu<br>
1265 Oliver Yeoh<br>
1266 Yossi Zahn<br>
1267 Jamie Zawinski</p>
1268 <p>Privoxy is based in part on code originally developed by Junkbusters Corp. and Anonymous Coders.</p>
1269 <p>Privoxy heavily relies on Philip Hazel's PCRE.</p>
1270 <p>The code to filter compressed content makes use of zlib which is written by Jean-loup Gailly and Mark
1272 <p>On systems that lack strptime(), Privoxy is using the one from the GNU C Library written by Ulrich
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