1 This file contains the license for Tor,
2 a free software project to provide anonymity on the Internet.
4 It also lists the licenses for other components used by Tor.
6 For more information about Tor, see https://www.torproject.org/.
8 If you got this file as a part of a larger bundle,
9 there may be other license terms that you should be aware of.
11 ===============================================================================
12 Tor is distributed under the "3-clause BSD" license, a commonly used
13 software license that means Tor is both free software and open source:
15 Copyright (c) 2001-2004, Roger Dingledine
16 Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
17 Copyright (c) 2007-2019, The Tor Project, Inc.
19 Redistribution and use in source and binary forms, with or without
20 modification, are permitted provided that the following conditions are
23 * Redistributions of source code must retain the above copyright
24 notice, this list of conditions and the following disclaimer.
26 * Redistributions in binary form must reproduce the above
27 copyright notice, this list of conditions and the following disclaimer
28 in the documentation and/or other materials provided with the
31 * Neither the names of the copyright owners nor the names of its
32 contributors may be used to endorse or promote products derived from
33 this software without specific prior written permission.
35 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46 ===============================================================================
47 src/ext/strlcat.c and src/ext/strlcpy.c by Todd C. Miller are licensed
48 under the following license:
50 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
51 * All rights reserved.
53 * Redistribution and use in source and binary forms, with or without
54 * modification, are permitted provided that the following conditions
56 * 1. Redistributions of source code must retain the above copyright
57 * notice, this list of conditions and the following disclaimer.
58 * 2. Redistributions in binary form must reproduce the above copyright
59 * notice, this list of conditions and the following disclaimer in the
60 * documentation and/or other materials provided with the distribution.
61 * 3. The name of the author may not be used to endorse or promote products
62 * derived from this software without specific prior written permission.
64 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
65 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
66 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
67 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
68 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
69 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
70 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
71 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
72 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
73 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
74 ===============================================================================
75 src/ext/tor_queue.h is licensed under the following license:
77 * Copyright (c) 1991, 1993
78 * The Regents of the University of California. All rights reserved.
80 * Redistribution and use in source and binary forms, with or without
81 * modification, are permitted provided that the following conditions
83 * 1. Redistributions of source code must retain the above copyright
84 * notice, this list of conditions and the following disclaimer.
85 * 2. Redistributions in binary form must reproduce the above copyright
86 * notice, this list of conditions and the following disclaimer in the
87 * documentation and/or other materials provided with the distribution.
88 * 3. Neither the name of the University nor the names of its contributors
89 * may be used to endorse or promote products derived from this software
90 * without specific prior written permission.
92 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
93 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
95 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
96 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
97 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
98 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
100 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
101 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
104 ===============================================================================
105 src/ext/csiphash.c is licensed under the following license:
107 Copyright (c) 2013 Marek Majkowski <marek@popcount.org>
109 Permission is hereby granted, free of charge, to any person obtaining a copy
110 of this software and associated documentation files (the "Software"), to deal
111 in the Software without restriction, including without limitation the rights
112 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
113 copies of the Software, and to permit persons to whom the Software is
114 furnished to do so, subject to the following conditions:
116 The above copyright notice and this permission notice shall be included in
117 all copies or substantial portions of the Software.
119 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
120 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
121 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
122 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
123 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
124 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
126 ===============================================================================
127 Trunnel is distributed under this license:
129 Copyright 2014 The Tor Project, Inc.
131 Redistribution and use in source and binary forms, with or without
132 modification, are permitted provided that the following conditions are
135 * Redistributions of source code must retain the above copyright
136 notice, this list of conditions and the following disclaimer.
138 * Redistributions in binary form must reproduce the above
139 copyright notice, this list of conditions and the following disclaimer
140 in the documentation and/or other materials provided with the
143 * Neither the names of the copyright owners nor the names of its
144 contributors may be used to endorse or promote products derived from
145 this software without specific prior written permission.
147 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
148 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
149 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
150 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
151 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
152 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
153 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
154 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
155 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
156 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
157 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
159 ===============================================================================
160 getdelim.c is distributed under this license:
162 Copyright (c) 2011 The NetBSD Foundation, Inc.
165 This code is derived from software contributed to The NetBSD Foundation
168 Redistribution and use in source and binary forms, with or without
169 modification, are permitted provided that the following conditions
171 1. Redistributions of source code must retain the above copyright
172 notice, this list of conditions and the following disclaimer.
173 2. Redistributions in binary form must reproduce the above copyright
174 notice, this list of conditions and the following disclaimer in the
175 documentation and/or other materials provided with the distribution.
177 THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
178 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
179 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
180 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
181 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
182 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
183 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
184 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
185 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
186 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
187 POSSIBILITY OF SUCH DAMAGE.
189 ===============================================================================
190 src/config/geoip and src/config/geoip6:
192 These files are based on the IPFire Location Database. For more
193 information, see https://location.ipfire.org/.
195 The data is distributed under a creative commons "BY-SA 4.0" license.
197 Find the full license terms at:
198 https://creativecommons.org/licenses/by-sa/4.0/
200 ===============================================================================
201 m4/pc_from_ucontext.m4 is available under the following license. Note that
202 it is *not* built into the Tor software.
204 Copyright (c) 2005, Google Inc.
207 Redistribution and use in source and binary forms, with or without
208 modification, are permitted provided that the following conditions are
211 * Redistributions of source code must retain the above copyright
212 notice, this list of conditions and the following disclaimer.
213 * Redistributions in binary form must reproduce the above
214 copyright notice, this list of conditions and the following disclaimer
215 in the documentation and/or other materials provided with the
217 * Neither the name of Google Inc. nor the names of its
218 contributors may be used to endorse or promote products derived from
219 this software without specific prior written permission.
221 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
222 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
223 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
224 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
225 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
226 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
227 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
228 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
229 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
230 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
231 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
233 ===============================================================================
234 m4/pkg.m4 is available under the following license. Note that
235 it is *not* built into the Tor software.
237 pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*-
238 serial 1 (pkg-config-0.24)
240 Copyright © 2004 Scott James Remnant <scott@netsplit.com>.
242 This program is free software; you can redistribute it and/or modify
243 it under the terms of the GNU General Public License as published by
244 the Free Software Foundation; either version 2 of the License, or
245 (at your option) any later version.
247 This program is distributed in the hope that it will be useful, but
248 WITHOUT ANY WARRANTY; without even the implied warranty of
249 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
250 General Public License for more details.
252 You should have received a copy of the GNU General Public License
253 along with this program; if not, write to the Free Software
254 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
256 As a special exception to the GNU General Public License, if you
257 distribute this file as part of a program that contains a
258 configuration script generated by Autoconf, you may include it under
259 the same distribution terms that you use for the rest of that program.
260 ===============================================================================
261 src/ext/readpassphrase.[ch] are distributed under this license:
263 Copyright (c) 2000-2002, 2007 Todd C. Miller <Todd.Miller@courtesan.com>
265 Permission to use, copy, modify, and distribute this software for any
266 purpose with or without fee is hereby granted, provided that the above
267 copyright notice and this permission notice appear in all copies.
269 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
270 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
271 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
272 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
273 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
274 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
275 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
277 Sponsored in part by the Defense Advanced Research Projects
278 Agency (DARPA) and Air Force Research Laboratory, Air Force
279 Materiel Command, USAF, under agreement number F39502-99-1-0512.
281 ===============================================================================
282 src/ext/mulodi4.c is distributed under this license:
284 =========================================================================
286 =========================================================================
288 The compiler_rt library is dual licensed under both the
289 University of Illinois "BSD-Like" license and the MIT license.
290 As a user of this code you may choose to use it under either
291 license. As a contributor, you agree to allow your code to be
294 Full text of the relevant licenses is included below.
296 =========================================================================
298 University of Illinois/NCSA
301 Copyright (c) 2009-2016 by the contributors listed in CREDITS.TXT
309 University of Illinois at Urbana-Champaign
313 Permission is hereby granted, free of charge, to any person
314 obtaining a copy of this software and associated documentation
315 files (the "Software"), to deal with the Software without
316 restriction, including without limitation the rights to use,
317 copy, modify, merge, publish, distribute, sublicense, and/or sell
318 copies of the Software, and to permit persons to whom the
319 Software is furnished to do so, subject to the following
322 * Redistributions of source code must retain the above
323 copyright notice, this list of conditions and the following
326 * Redistributions in binary form must reproduce the above
327 copyright notice, this list of conditions and the following
328 disclaimers in the documentation and/or other materials
329 provided with the distribution.
331 * Neither the names of the LLVM Team, University of Illinois
332 at Urbana-Champaign, nor the names of its contributors may
333 be used to endorse or promote products derived from this
334 Software without specific prior written permission.
336 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
337 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
338 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
339 NONINFRINGEMENT. IN NO EVENT SHALL THE CONTRIBUTORS OR COPYRIGHT
340 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
341 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
342 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
343 OTHER DEALINGS WITH THE SOFTWARE.
345 =========================================================================
347 Copyright (c) 2009-2015 by the contributors listed in CREDITS.TXT
349 Permission is hereby granted, free of charge, to any person
350 obtaining a copy of this software and associated documentation
351 files (the "Software"), to deal in the Software without
352 restriction, including without limitation the rights to use,
353 copy, modify, merge, publish, distribute, sublicense, and/or sell
354 copies of the Software, and to permit persons to whom the
355 Software is furnished to do so, subject to the following
358 The above copyright notice and this permission notice shall be
359 included in all copies or substantial portions of the Software.
361 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
362 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
363 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
364 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
365 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
366 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
367 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
368 OTHER DEALINGS IN THE SOFTWARE.
370 =========================================================================
371 Copyrights and Licenses for Third Party Software Distributed with LLVM:
372 =========================================================================
374 The LLVM software contains code written by third parties. Such
375 software will have its own individual LICENSE.TXT file in the
376 directory in which it appears. This file will describe the
377 copyrights, license, and restrictions which apply to that code.
379 The disclaimer of warranty in the University of Illinois Open
380 Source License applies to all code in the LLVM Distribution, and
381 nothing in any of the other licenses gives permission to use the
382 names of the LLVM Team or the University of Illinois to endorse
383 or promote products derived from this Software.
385 ===============================================================================
386 If you got Tor as a static binary with OpenSSL included, then you should know:
387 "This product includes software developed by the OpenSSL Project
388 for use in the OpenSSL Toolkit (http://www.openssl.org/)"
389 ===============================================================================