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29 <h1 class="SECT1"><a name="COPYRIGHT">12. Privoxy Copyright, License and History</a></h1>
30 <p>Copyright © 2001-2021 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.</p>
33 <p><span class="APPLICATION">Privoxy</span> is free software; you can redistribute and/or modify its source code
34 under the terms of the <i class="CITETITLE">GNU General Public License</i> as published by the Free Software
35 Foundation, either version 2 of the license, or (at your option) any later version.</p>
36 <p>The same is true for <span class="APPLICATION">Privoxy</span> binaries unless they are linked with a <a href=
37 "https://tls.mbed.org/" target="_top">mbed TLS</a> version that is licensed under the Apache 2.0 license in which
38 case you can redistribute and/or modify the <span class="APPLICATION">Privoxy</span> binaries under the terms of
39 the <i class="CITETITLE">GNU General Public License</i> as published by the Free Software Foundation, either
40 version 3 of the license, or (at your option) any later version.</p>
41 <p>Both licenses are included in the next section.</p>
43 <h2 class="SECT2"><a name="LICENSE">12.1. License</a></h2>
45 <h3 class="SECT3"><a name="GPLV2">12.1.1. GNU General Public License version 2</a></h3>
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49 <pre class="LITERALLAYOUT"> GNU GENERAL PUBLIC LICENSE
52 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
53 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
54 Everyone is permitted to copy and distribute verbatim copies
55 of this license document, but changing it is not allowed.
59 The licenses for most software are designed to take away your
60 freedom to share and change it. By contrast, the GNU General Public
61 License is intended to guarantee your freedom to share and change free
62 software--to make sure the software is free for all its users. This
63 General Public License applies to most of the Free Software
64 Foundation's software and to any other program whose authors commit to
65 using it. (Some other Free Software Foundation software is covered by
66 the GNU Lesser General Public License instead.) You can apply it to
69 When we speak of free software, we are referring to freedom, not
70 price. Our General Public Licenses are designed to make sure that you
71 have the freedom to distribute copies of free software (and charge for
72 this service if you wish), that you receive source code or can get it
73 if you want it, that you can change the software or use pieces of it
74 in new free programs; and that you know you can do these things.
76 To protect your rights, we need to make restrictions that forbid
77 anyone to deny you these rights or to ask you to surrender the rights.
78 These restrictions translate to certain responsibilities for you if you
79 distribute copies of the software, or if you modify it.
81 For example, if you distribute copies of such a program, whether
82 gratis or for a fee, you must give the recipients all the rights that
83 you have. You must make sure that they, too, receive or can get the
84 source code. And you must show them these terms so they know their
87 We protect your rights with two steps: (1) copyright the software, and
88 (2) offer you this license which gives you legal permission to copy,
89 distribute and/or modify the software.
91 Also, for each author's protection and ours, we want to make certain
92 that everyone understands that there is no warranty for this free
93 software. If the software is modified by someone else and passed on, we
94 want its recipients to know that what they have is not the original, so
95 that any problems introduced by others will not reflect on the original
98 Finally, any free program is threatened constantly by software
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104 The precise terms and conditions for copying, distribution and
107 GNU GENERAL PUBLIC LICENSE
108 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
110 0. This License applies to any program or other work which contains
111 a notice placed by the copyright holder saying it may be distributed
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125 Whether that is true depends on what the Program does.
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320 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
321 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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328 END OF TERMS AND CONDITIONS
330 How to Apply These Terms to Your New Programs
332 If you develop a new program, and you want it to be of the greatest
333 possible use to the public, the best way to achieve this is to make it
334 free software which everyone can redistribute and change under these terms.
336 To do so, attach the following notices to the program. It is safest
337 to attach them to the start of each source file to most effectively
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339 the "copyright" line and a pointer to where the full notice is found.
341 <one line to give the program's name and a brief idea of what it does.>
342 Copyright (C) <year> <name of author>
344 This program is free software; you can redistribute it and/or modify
345 it under the terms of the GNU General Public License as published by
346 the Free Software Foundation; either version 2 of the License, or
347 (at your option) any later version.
349 This program is distributed in the hope that it will be useful,
350 but WITHOUT ANY WARRANTY; without even the implied warranty of
351 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
352 GNU General Public License for more details.
354 You should have received a copy of the GNU General Public License along
355 with this program; if not, write to the Free Software Foundation, Inc.,
356 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
358 Also add information on how to contact you by electronic and paper mail.
360 If the program is interactive, make it output a short notice like this
361 when it starts in an interactive mode:
363 Gnomovision version 69, Copyright (C) year name of author
364 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
365 This is free software, and you are welcome to redistribute it
366 under certain conditions; type `show c' for details.
368 The hypothetical commands `show w' and `show c' should show the appropriate
369 parts of the General Public License. Of course, the commands you use may
370 be called something other than `show w' and `show c'; they could even be
371 mouse-clicks or menu items--whatever suits your program.
373 You should also get your employer (if you work as a programmer) or your
374 school, if any, to sign a "copyright disclaimer" for the program, if
375 necessary. Here is a sample; alter the names:
377 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
378 `Gnomovision' (which makes passes at compilers) written by James Hacker.
380 <signature of Ty Coon>, 1 April 1989
381 Ty Coon, President of Vice
383 This General Public License does not permit incorporating your program into
384 proprietary programs. If your program is a subroutine library, you may
385 consider it more useful to permit linking proprietary applications with the
386 library. If this is what you want to do, use the GNU Lesser General
387 Public License instead of this License.
394 <h3 class="SECT3"><a name="GPLV3">12.1.2. GNU General Public License version 3</a></h3>
395 <table border="0" bgcolor="#E0E0E0" width="100%">
398 <pre class="LITERALLAYOUT"> GNU GENERAL PUBLIC LICENSE
399 Version 3, 29 June 2007
401 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
402 Everyone is permitted to copy and distribute verbatim copies
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408 software and other kinds of works.
410 The licenses for most software and other practical works are designed
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412 the GNU General Public License is intended to guarantee your freedom to
413 share and change all versions of a program--to make sure it remains free
414 software for all its users. We, the Free Software Foundation, use the
415 GNU General Public License for most of our software; it applies also to
416 any other work released this way by its authors. You can apply it to
419 When we speak of free software, we are referring to freedom, not
420 price. Our General Public Licenses are designed to make sure that you
421 have the freedom to distribute copies of free software (and charge for
422 them if you wish), that you receive source code or can get it if you
423 want it, that you can change the software or use pieces of it in new
424 free programs, and that you know you can do these things.
426 To protect your rights, we need to prevent others from denying you
427 these rights or asking you to surrender the rights. Therefore, you have
428 certain responsibilities if you distribute copies of the software, or if
429 you modify it: responsibilities to respect the freedom of others.
431 For example, if you distribute copies of such a program, whether
432 gratis or for a fee, you must pass on to the recipients the same
433 freedoms that you received. You must make sure that they, too, receive
434 or can get the source code. And you must show them these terms so they
437 Developers that use the GNU GPL protect your rights with two steps:
438 (1) assert copyright on the software, and (2) offer you this License
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944 not convey it at all. For example, if you agree to terms that obligate you
945 to collect a royalty for further conveying from those to whom you convey
946 the Program, the only way you could satisfy both those terms and this
947 License would be to refrain entirely from conveying the Program.
949 13. Use with the GNU Affero General Public License.
951 Notwithstanding any other provision of this License, you have
952 permission to link or combine any covered work with a work licensed
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964 be similar in spirit to the present version, but may differ in detail to
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1018 END OF TERMS AND CONDITIONS
1020 How to Apply These Terms to Your New Programs
1022 If you develop a new program, and you want it to be of the greatest
1023 possible use to the public, the best way to achieve this is to make it
1024 free software which everyone can redistribute and change under these terms.
1026 To do so, attach the following notices to the program. It is safest
1027 to attach them to the start of each source file to most effectively
1028 state the exclusion of warranty; and each file should have at least
1029 the "copyright" line and a pointer to where the full notice is found.
1031 <one line to give the program's name and a brief idea of what it does.>
1032 Copyright (C) <year> <name of author>
1034 This program is free software: you can redistribute it and/or modify
1035 it under the terms of the GNU General Public License as published by
1036 the Free Software Foundation, either version 3 of the License, or
1037 (at your option) any later version.
1039 This program is distributed in the hope that it will be useful,
1040 but WITHOUT ANY WARRANTY; without even the implied warranty of
1041 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1042 GNU General Public License for more details.
1044 You should have received a copy of the GNU General Public License
1045 along with this program. If not, see <https://www.gnu.org/licenses/>.
1047 Also add information on how to contact you by electronic and paper mail.
1049 If the program does terminal interaction, make it output a short
1050 notice like this when it starts in an interactive mode:
1052 <program> Copyright (C) <year> <name of author>
1053 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
1054 This is free software, and you are welcome to redistribute it
1055 under certain conditions; type `show c' for details.
1057 The hypothetical commands `show w' and `show c' should show the appropriate
1058 parts of the General Public License. Of course, your program's commands
1059 might be different; for a GUI interface, you would use an "about box".
1061 You should also get your employer (if you work as a programmer) or school,
1062 if any, to sign a "copyright disclaimer" for the program, if necessary.
1063 For more information on this, and how to apply and follow the GNU GPL, see
1064 <https://www.gnu.org/licenses/>.
1066 The GNU General Public License does not permit incorporating your program
1067 into proprietary programs. If your program is a subroutine library, you
1068 may consider it more useful to permit linking proprietary applications with
1069 the library. If this is what you want to do, use the GNU Lesser General
1070 Public License instead of this License. But first, please read
1071 <https://www.gnu.org/licenses/why-not-lgpl.html>.
1078 <h3 class="SECT3"><a name="THIRD-PARTY-LICENSES">12.1.3. Third-party licenses and copyrights</a></h3>
1079 <p>Privoxy depends on a couple of third-party libraries which have seperate licenses. Please refer to the
1080 third-party websites for up-to-date license and copyright information.</p>
1081 <p>Privoxy depends on <a href="https://pcre.org/" target="_top">pcre</a>.</p>
1082 <p>When compiled with FEATURE_BROTLI (optional), Privoxy depends on <a href="https://www.brotli.org/" target=
1083 "_top">brotli</a>.</p>
1084 <p>When compiled with FEATURE_HTTPS_INSPECTION (optional), Privoxy depends on a TLS library. The supported
1085 libraries are <a href="https://www.openssl.org/" target="_top">LibreSSL</a>, <a href="https://tls.mbed.org/"
1086 target="_top">mbed TLS</a> and <a href="https://www.openssl.org/" target="_top">OpenSSL</a>.</p>
1087 <p>When compiled with FEATURE_ZLIB (optional), Privoxy depends on <a href="https://zlib.net/" target=
1088 "_top">zlib</a>.</p>
1092 <h2 class="SECT2"><a name="HISTORY">12.2. History</a></h2>
1093 <p>A long time ago, there was the <span class="APPLICATION">Internet Junkbuster</span>, by Anonymous Coders and
1094 Junkbusters Corporation. This saved many users a lot of pain in the early days of web advertising and user
1096 <p>But the web, its protocols and standards, and with it, the techniques for forcing ads on users, give up
1097 autonomy over their browsing, and for tracking them, keeps evolving. Unfortunately, the <span class=
1098 "APPLICATION">Internet Junkbuster</span> did not. Version 2.0.2, published in 1998, was the last official
1099 release, available from Junkbusters Corporation. Fortunately, it had been released under the GNU <a href=
1100 "https://www.gnu.org/licenses/old-licenses/gpl-2.0.html" target="_top">GPL</a>, which allowed further development
1102 <p>So Stefan Waldherr started maintaining an improved version of the software, to which eventually a number of
1103 people contributed patches. It could already replace banners with a transparent image, and had a first version of
1104 pop-up killing, but it was still very closely based on the original, with all its limitations, such as the lack
1105 of HTTP/1.1 support, flexible per-site configuration, or content modification. The last release from this effort
1106 was version 2.0.2-10, published in 2000.</p>
1107 <p>Then, some <a href="https://www.privoxy.org/user-manual/copyright.html#AUTHORS" target="_top">developers</a>
1108 picked up the thread, and started turning the software inside out, upside down, and then reassembled it, adding
1109 many <a href="https://www.privoxy.org/user-manual/introduction.html#FEATURES" target="_top">new features</a>
1111 <p>The result of this is <span class="APPLICATION">Privoxy</span>, whose first stable version, 3.0, was released
1113 <p>As of 2012 the Junkbusters Corporation's website (http://www.junkbusters.com/) has been shut down, but Privoxy
1114 is still actively maintained.</p>
1117 <h2 class="SECT2"><a name="AUTHORS">12.3. Authors</a></h2>
1118 <p>Current Privoxy Team:</p>
1119 <p class="LITERALLAYOUT"> Fabian Keil, lead developer<br>
1120 David Schmidt<br>
1121 Lee Rian<br>
1122 Roland Rosenfeld<br>
1123 Ian Silvester</p>
1124 <p>Former Privoxy Team Members:</p>
1125 <p class="LITERALLAYOUT"> Johny Agotnes<br>
1126 Rodrigo Barbosa<br>
1127 Moritz Barsnick<br>
1128 Hal Burgiss<br>
1129 Ian Cummings<br>
1130 Brian Dessent<br>
1131 Jon Foster<br>
1132 Karsten Hopp<br>
1133 Alexander Lazic<br>
1134 Daniel Leite<br>
1135 Gábor Lipták<br>
1136 Adam Lock<br>
1137 Guy Laroche<br>
1138 Justin McMurtry<br>
1139 Mark Miller<br>
1140 Gerry Murphy<br>
1141 Andreas Oesterhelt<br>
1142 Haroon Rafique<br>
1143 Georg Sauthoff<br>
1144 Thomas Steudten<br>
1145 Jörg Strohmayer<br>
1146 Rodney Stromlund<br>
1147 Sviatoslav Sviridov<br>
1148 Sarantis Paskalis<br>
1149 Stefan Waldherr</p>
1150 <p>Thanks to the many people who have tested Privoxy, reported bugs, provided patches, made suggestions, donated
1151 or contributed in some other way. These include (in alphabetical order):</p>
1152 <p class="LITERALLAYOUT"> Rustam Abdullaev<br>
1153 Clint Adams<br>
1156 Davide Alberani<br>
1157 Maxim Antonov<br>
1158 Anatoly Arzhnikov<br>
1159 Ken Arromdee<br>
1160 Natxo Asenjo<br>
1161 Devin Bayer<br>
1162 Havard Berland<br>
1163 David Binderman<br>
1164 David Bo<br>
1165 Gergely Bor<br>
1166 Francois Botha<br>
1167 Reiner Buehl<br>
1170 Andrew J. Caines<br>
1171 Clifford Caoile<br>
1172 Edward Carrel<br>
1173 Pak Chan<br>
1174 Wan-Teh Chang<br>
1175 Sam Chen<br>
1176 Ramkumar Chinchani<br>
1177 Gwyn Ciesla<br>
1178 Billy Crook<br>
1179 Frédéric Crozat<br>
1180 Matthew Daley<br>
1182 Michael T. Davis<br>
1183 Markus Dittrich<br>
1184 Mattes Dolak<br>
1185 Matthias Drochner<br>
1188 Peter E.<br>
1189 Florian Effenberger<br>
1190 Markus Elfring<br>
1191 Ryan Farmer<br>
1192 Matthew Fischer<br>
1193 T Ford<br>
1194 Dean Gaudet<br>
1195 Stephen Gildea<br>
1196 Morton A. Goldberg<br>
1197 John McGowan<br>
1198 Danny Goossen<br>
1199 Lizik Grelier<br>
1200 Daniel Griscom<br>
1201 Felix Gröbert<br>
1202 Bernard Guillot<br>
1203 Jeff H.<br>
1204 Tim H.<br>
1205 Aaron Hamid<br>
1206 Darel Henman<br>
1207 Mathias Homann<br>
1208 Magnus Holmgren<br>
1209 Eric M. Hopper<br>
1210 Ralf Horstmann<br>
1211 Ho+ Ho+ Ho+<br>
1212 Nedžad Hrnjica<br>
1213 Stefan Huehner<br>
1214 Basil Hussain<br>
1215 Peter Hyman<br>
1216 Artem Ivanov<br>
1217 Derek Jennings<br>
1218 Andrew Jones<br>
1219 Julien Joubert<br>
1220 Ralf Jungblut<br>
1221 Petr Kadlec<br>
1222 Kacperdominik<br>
1225 Robert Klemme<br>
1226 Max Khon<br>
1227 Steven Kolins<br>
1229 Stefan Kurtz<br>
1230 Zeno Kugy<br>
1231 David Laight<br>
1232 Bert van Leeuwen<br>
1233 Don Libes<br>
1234 Paul Lieverse<br>
1235 Adele Lime<br>
1236 Aaron Linville<br>
1237 Han Liu<br>
1238 Toby Lyward<br>
1239 Wil Mahan<br>
1240 Jindrich Makovicka<br>
1241 Raphael Marichez<br>
1242 Francois Marier<br>
1243 Angelina Matson<br>
1245 Jonathan McKenzie<br>
1246 David Mediavilla<br>
1247 Raphael Moll<br>
1248 J. Momberger<br>
1249 Peter Müller<br>
1250 Mathew Murphy<br>
1251 Amuro Namie<br>
1252 Mark Nelson<br>
1253 Nettozahler<br>
1254 Tobias Netzel<br>
1257 John Palkovic<br>
1259 Adam Piggott<br>
1260 Petr Písar<br>
1262 Dan Price<br>
1264 Roberto Ragusa<br>
1266 Félix Rauch<br>
1267 Kai Raven<br>
1268 Marvin Renich<br>
1269 Black Rider<br>
1270 Chris John Riley<br>
1271 Maynard Riley<br>
1272 Joshua Rogers<br>
1273 Ivan Romanov<br>
1274 Andreas Rutkauskas<br>
1277 Bart Schelstraete<br>
1278 Richard Schneidt<br>
1279 Gregory Seidman<br>
1280 Atman Sense<br>
1281 Mark Seward<br>
1282 Franz Schwartau<br>
1283 Chung-chieh Shan<br>
1284 Johan Sintorn<br>
1285 Benjamin C. Wiley Sittler<br>
1286 DRS David Soft<br>
1287 Simon South<br>
1288 Dan Stahlke<br>
1290 Oliver Stoeneberg<br>
1291 Václav Švec<br>
1292 Endre Szabo<br>
1293 Rick Sykes<br>
1295 Spinor S.<br>
1296 Tceverling<br>
1297 Peter Thoenen<br>
1298 Marc Thomas<br>
1299 Martin Thomas<br>
1300 Reuben Thomas<br>
1301 Guybrush Threepwood<br>
1302 Tyrexionibus<br>
1304 Sam Varshavchik<br>
1306 Joel Verhagen<br>
1307 Bobby G. Vinyard<br>
1308 Jochen Voss<br>
1309 David Wagner<br>
1310 Glenn Washburn<br>
1311 Song Weijia<br>
1312 Jörg Weinmann<br>
1313 Darren Wiebe<br>
1314 Anduin Withers<br>
1315 withoutname<br>
1316 Eduard Wulff<br>
1317 Leo Wzukw<br>
1319 Yang Xia<br>
1320 Jarry Xu<br>
1321 Oliver Yeoh<br>
1322 Wen Yue<br>
1323 Yossi Zahn<br>
1324 Jamie Zawinski<br>
1326 Radoslaw Zielinski</p>
1327 <p>Privoxy is based in part on code originally developed by Junkbusters Corp. and Anonymous Coders.</p>
1328 <p>Privoxy heavily relies on Philip Hazel's PCRE.</p>
1329 <p>The code to filter compressed content makes use of zlib which is written by Jean-loup Gailly and Mark
1331 <p>On systems that lack strptime(), Privoxy is using the one from the GNU C Library written by Ulrich
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1346 <td width="33%" align="right" valign="top">See Also</td>
projects / privoxy.git / blob