tor-webwml.git

1) ## translation metadata
2) # Revision: $Revision$

3) # Translation-Priority: 2-medium

4) 
5) #include "head.wmi" TITLE="Verifying Signatures" CHARSET="UTF-8"
6) 
7) <div class="main-column">
8) 
9) <h2>Verifying signatures on released files</h2>
10) <hr />
11) 
12) <p>Each file on <a href="<page download>">our download page</a> is accompanied
13) by a file with the same name and the extension ".asc".</p>
14) 
15) <p>These are PGP signatures, so you can verify that the file you've downloaded
16) is exactly the one that we intended you to get.</p>
17) 
18) <p>Of course, you'll need to have our pgp keys in your keyring: if you don't
19) know the pgp key, you can't be sure that it was really us who signed it. The
20) signing keys we use are Roger's (0x28988BF5) and Nick's (0x165733EA, or its
21) subkey 0x8D29319A). Some binary packages may also be signed by Andrew's

22) (0x31B0974B), Peter's (0x94C09C7F, or its subkey 0xAFA44BDD), Matt's
23) (0x5FA14861), or Jacob's (0x9D0FACE4).</p>

24) 
25) <p>You can import keys directly from GnuPG as well:</p>
26) 
27) <pre>gpg --keyserver subkeys.pgp.net --recv-keys 0x28988BF5</pre>
28) 
29) <p>or search for keys with</p>
30) 

31) <pre>gpg --keyserver subkeys.pgp.net --search-keys 0x28988BF5</pre>

32) 
33) <p>and when you select one, it will be added to your keyring.</p>
34) 
35) <p>The fingerprints for the keys should be:</p>
36) 
37) <pre>
38) pub   1024D/28988BF5 2000-02-27
39)       Key fingerprint = B117 2656 DFF9 83C3 042B  C699 EB5A 896A 2898 8BF5

40) uid                  Roger Dingledine <arma@mit.edu>

41) 
42) pub   3072R/165733EA 2004-07-03
43)       Key fingerprint = B35B F85B F194 89D0 4E28  C33C 2119 4EBB 1657 33EA

44) uid                  Nick Mathewson <nickm@alum.mit.edu>
45) uid                  Nick Mathewson <nickm@wangafu.net>
46) uid                  Nick Mathewson <nickm@freehaven.net>

47) 
48) pub  1024D/31B0974B 2003-07-17
49)      Key fingerprint = 0295 9AA7 190A B9E9 027E  0736 3B9D 093F 31B0 974B

50) uid                  Andrew Lewman (phobos) <phobos@rootme.org>

51) 
52) pub   1024D/94C09C7F 1999-11-10
53)       Key fingerprint = 5B00 C96D 5D54 AEE1 206B  AF84 DE7A AF6E 94C0 9C7F
54) uid                  Peter Palfrader

55) uid                  Peter Palfrader <peter@palfrader.org>
56) uid                  Peter Palfrader <weasel@debian.org>

57) 
58) pub   1024D/5FA14861 2005-08-17
59)       Key fingerprint = 9467 294A 9985 3C9C 65CB  141D AF7E 0E43 5FA1 4861

60) uid                  Matt Edman <edmanm@rpi.edu>
61) uid                  Matt Edman <Matt_Edman@baylor.edu>
62) uid                  Matt Edman <edmanm2@cs.rpi.edu>

63) sub   4096g/EA654E59 2005-08-17

64) 
65) pub   1024D/9D0FACE4 2008-03-11 [expires: 2010-03-11]
66)       Key fingerprint = 12E4 04FF D3C9 31F9 3405  2D06 B884 1A91 9D0F ACE4

67) uid                  Jacob Appelbaum <jacob@appelbaum.net>

68) sub   4096g/D5E87583 2008-03-11 [expires: 2010-03-11]

69) </pre>
70) 
71) <p>(Of course if you want to be really certain that those are the real ones

72) then you should check this from more places or even better get into key signing
73) and build a trust path to those keys.)</p>

74) 
75) <p>If you're using GnuPG, then put the .asc and the download in the same

76) directory and type "gpg --verify (whatever).asc (whatever)". It will say
77) something like "Good signature" or "BAD signature" using the following type of
78) command:</p>

79) 
80) <pre>

81) gpg --verify tor-0.1.0.17.tar.gz.asc tor-0.1.0.17.tar.gz

82) gpg: Signature made Wed Feb 23 01:33:29 2005 EST using DSA key ID 28988BF5

83) gpg: Good signature from "Roger Dingledine <arma@mit.edu>"
84) gpg:                 aka "Roger Dingledine <arma@mit.edu>"

85) gpg: WARNING: This key is not certified with a trusted signature!
86) gpg:          There is no indication that the signature belongs to the owner.
87) Primary key fingerprint: B117 2656 DFF9 83C3 042B  C699 EB5A 896A 2898 8BF5
88) </pre>
89) 
90) <p>
91) Notice that there is a warning because you haven't assigned a trust index to
92) this user. This means that your program verified the key made that signature.
93) It's up to the user to decide if that key really belongs to the developers. The
94) best method is to meet them in person and exchange gpg fingerprints. Keys can

95) also be signed. If you look up Roger or Nick's keys, other people have
96) essentially said "we have verified this is Roger/Nick". So if you trust that

97) third party, then you have a level of trust for that arma/nick.
98) </p>
99) 
100) <p>All this means is you can ignore the message or assign a trust level.</p>
101) 
102) <p>For your reference, this is an example of a <em>BAD</em> verification. It
103) means that the signature and file contents do not match:</p>
104) 
105) <pre>
106) gpg --verify tor-0.1.0.17.tar.gz.asc
107) gpg: Signature made Wed Feb 23 01:33:29 2005 EST using DSA key ID 28988BF5

108) gpg: BAD signature from "Roger Dingledine <arma@mit.edu>"