1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<TITLE> [Mageia-dev] Signature verification of sources
</TITLE>
<LINK REL="Index" HREF="index.html" >
<LINK REL="made" HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Signature%20verification%20of%20sources&In-Reply-To=%3C201201101250.16444.bgmilne%40zarb.org%3E">
<META NAME="robots" CONTENT="index,nofollow">
<META http-equiv="Content-Type" content="text/html; charset=us-ascii">
<LINK REL="Previous" HREF="011198.html">
<LINK REL="Next" HREF="011208.html">
</HEAD>
<BODY BGCOLOR="#ffffff">
<H1>[Mageia-dev] Signature verification of sources</H1>
<B>Buchan Milne</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Signature%20verification%20of%20sources&In-Reply-To=%3C201201101250.16444.bgmilne%40zarb.org%3E"
TITLE="[Mageia-dev] Signature verification of sources">bgmilne at zarb.org
</A><BR>
<I>Tue Jan 10 11:50:15 CET 2012</I>
<P><UL>
<LI>Previous message: <A HREF="011198.html">[Mageia-dev] Fwd: Re: [Kolab-devel] Supercolliding a PHP array - DoS Attacks
</A></li>
<LI>Next message: <A HREF="011208.html">[Mageia-dev] Signature verification of sources
</A></li>
<LI> <B>Messages sorted by:</B>
<a href="date.html#11201">[ date ]</a>
<a href="thread.html#11201">[ thread ]</a>
<a href="subject.html#11201">[ subject ]</a>
<a href="author.html#11201">[ author ]</a>
</LI>
</UL>
<HR>
<!--beginarticle-->
<PRE>I think we should be in the position to be able to verify the origin of any
software we provide to users.
While we have cryptographic verification of the RPMS (both 'binary' and src),
and we store the hashes of the sources, AFAIK we do very limited verification
of any signatures provided by upstream.
Now, unfortunately, not all upstreams provide useful signatures:
1)Not all upstreams provide signatures (some even say that there is no point,
as no-one verifies them)
2)Some upstreams (such as kernel) use automated mechanisms to generate
signatures (and in the case of kernl explicitly state that they are only
useful for verifying that they match what is on kernel.org, not necessarily
that they match what linus generated)
3)Some upstreams do provide signatures, but sometimes the signing identity
changes, or the mechanism (sign gzipped tarball once, unzipped tarball next
time)
It seems difficult to argue for upstreams to provide good signatures if no-one
is verifying them
So, I have started adding signature verification to my packages where upstream
provides signatures:
-tevent
-tdb
-ldb
-samba
In the past few weeks, I have been moving to defining and using a 'check_sig'
macro, and I wonder if it would be useful to move it to spec-helper, and start
using it wherever possible.
This is the version in the ldb spec:
%define check_sig() export GNUPGHOME=%{_tmppath}/rpm-gpghome \
if [ -d "$GNUPGHOME" ] \
then echo "Error, GNUPGHOME $GNUPGHOME exists, remove it and try again"; exit
1 \
fi \
install -d -m700 $GNUPGHOME \
gpg --import %{1} \
gpg --trust-model always --verify %{2} %{?3} \
rm -Rf $GNUPGHOME \
Used as follows:
Source: <A HREF="http://samba.org/ftp/ldb/ldb-%{ldbver">http://samba.org/ftp/ldb/ldb-%{ldbver</A>}.tar.gz
Source1: <A HREF="http://samba.org/ftp/ldb/ldb-%{ldbver">http://samba.org/ftp/ldb/ldb-%{ldbver</A>}.tar.gz.asc
Source2: jelmer.asc
[...]
%prep
%check_sig %{SOURCE2} %{SOURCE1} %{SOURCE0}
Producing:
+ export GNUPGHOME=/home/bgmilne/tmp/rpm-gpghome
+ GNUPGHOME=/home/bgmilne/tmp/rpm-gpghome
+ '[' -d /home/bgmilne/tmp/rpm-gpghome ']'
+ install -d -m700 /home/bgmilne/tmp/rpm-gpghome
+ gpg --import /home/bgmilne/Download/source/svn/mageia/ldb/SOURCES/jelmer.asc
gpg: keyring `/home/bgmilne/tmp/rpm-gpghome/secring.gpg' created
gpg: keyring `/home/bgmilne/tmp/rpm-gpghome/pubring.gpg' created
gpg: /home/bgmilne/tmp/rpm-gpghome/trustdb.gpg: trustdb created
gpg: key 1EEF5276: public key "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at samba.org</A>>" imported
gpg: key D729A457: public key "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at samba.org</A>>" imported
gpg: Total number processed: 2
gpg: imported: 2 (RSA: 1)
gpg: no ultimately trusted keys found
+ gpg --trust-model always --verify
/home/bgmilne/Download/source/svn/mageia/ldb/SOURCES/ldb-1.1.4.tar.gz.asc
/home/bgmilne/Download/source/svn/mageia/ldb/SOURCES/ldb-1.1.4.tar.gz
gpg: Signature made Sat 03 Dec 2011 01:14:25 SAST using RSA key ID D729A457
gpg: Good signature from "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at samba.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at sernet.de</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at apache.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at debian.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at ubuntu.com</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at vernstok.nl</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at canonical.com</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at openchange.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jrvernooij at tigris.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer.vernooij at canonical.com</A>>"
gpg: WARNING: Using untrusted key!
gpg: Signature made Sat 03 Dec 2011 01:14:25 SAST using DSA key ID 1EEF5276
gpg: Good signature from "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at samba.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at fsfe.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at sernet.de</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at debian.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at ubuntu.com</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jrvernoo at cs.uu.nl</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at vernstok.nl</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at openchange.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jrvernooij at tigris.org</A>>"
gpg: aka "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at a-eskwadraat.nl</A>>"
gpg: WARNING: Using untrusted key!
+ rm -Rf /home/bgmilne/tmp/rpm-gpghome
Tampering with the source results in:
+ export GNUPGHOME=/home/bgmilne/tmp/rpm-gpghome
+ GNUPGHOME=/home/bgmilne/tmp/rpm-gpghome
+ '[' -d /home/bgmilne/tmp/rpm-gpghome ']'
+ install -d -m700 /home/bgmilne/tmp/rpm-gpghome
+ gpg --import /home/bgmilne/Download/source/svn/mageia/ldb/SOURCES/jelmer.asc
gpg: keyring `/home/bgmilne/tmp/rpm-gpghome/secring.gpg' created
gpg: keyring `/home/bgmilne/tmp/rpm-gpghome/pubring.gpg' created
gpg: /home/bgmilne/tmp/rpm-gpghome/trustdb.gpg: trustdb created
gpg: key 1EEF5276: public key "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at samba.org</A>>" imported
gpg: key D729A457: public key "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at samba.org</A>>" imported
gpg: Total number processed: 2
gpg: imported: 2 (RSA: 1)
gpg: no ultimately trusted keys found
+ gpg --trust-model always --verify
/home/bgmilne/Download/source/svn/mageia/ldb/SOURCES/ldb-1.1.4.tar.gz.asc
/home/bgmilne/Download/source/svn/mageia/ldb/SOURCES/ldb-1.1.4.tar.gz
gpg: Signature made Sat 03 Dec 2011 01:14:25 SAST using RSA key ID D729A457
gpg: BAD signature from "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at samba.org</A>>"
gpg: Signature made Sat 03 Dec 2011 01:14:25 SAST using DSA key ID 1EEF5276
gpg: BAD signature from "Jelmer Vernooij <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">jelmer at samba.org</A>>"
error: Bad exit status from /home/bgmilne/tmp/rpm-tmp.YqBT4j (%prep)
Or, if %{_tmppath}/rpm-gpghome exists (important to check for, since we are
using --trust-model always):
Executing(%prep): /bin/sh -e /home/bgmilne/tmp/rpm-tmp.OEoIHT
+ umask 022
+ cd /home/bgmilne/rpm/BUILD
+ '[' 1 -eq 1 ']'
+ '[' 1 -eq 1 ']'
+ '[' 1 -eq 1 ']'
+ export GNUPGHOME=/home/bgmilne/tmp/rpm-gpghome
+ GNUPGHOME=/home/bgmilne/tmp/rpm-gpghome
+ '[' -d /home/bgmilne/tmp/rpm-gpghome ']'
+ echo 'Error, GNUPGHOME /home/bgmilne/tmp/rpm-gpghome exists, remove it and
try again'
Error, GNUPGHOME /home/bgmilne/tmp/rpm-gpghome exists, remove it and try again
+ exit 1
error: Bad exit status from /home/bgmilne/tmp/rpm-tmp.OEoIHT (%prep)
Comments?
Regards,
Buchan
</PRE>
<!--endarticle-->
<HR>
<P><UL>
<!--threads-->
<LI>Previous message: <A HREF="011198.html">[Mageia-dev] Fwd: Re: [Kolab-devel] Supercolliding a PHP array - DoS Attacks
</A></li>
<LI>Next message: <A HREF="011208.html">[Mageia-dev] Signature verification of sources
</A></li>
<LI> <B>Messages sorted by:</B>
<a href="date.html#11201">[ date ]</a>
<a href="thread.html#11201">[ thread ]</a>
<a href="subject.html#11201">[ subject ]</a>
<a href="author.html#11201">[ author ]</a>
</LI>
</UL>
<hr>
<a href="https://www.mageia.org/mailman/listinfo/mageia-dev">More information about the Mageia-dev
mailing list</a><br>
</body></html>
|
