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Contents of /nl.nikhef.pdp.fetchcrl/tags/fetch-crl-3.0.16/CHANGES

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Revision 1878 - (show annotations) (download)
Tue Aug 10 07:03:43 2010 UTC (11 years, 3 months ago) by davidg
Original Path: trunk/fetchcrl/CHANGES
File size: 14174 byte(s)
upgrade to RC4, see changelog

1 ==============================================================================
2 CHANGES to fetch-crl - the Certificate Revocation List retrieval tool
3 ==============================================================================
4 The fetch-crl utility will retrieve certificate revocation lists (CRLs) for
5 a set of installed trust anchors, based on crl_url files or IGTF-style info
6 files. It will install these for use with OpenSSL, NSS or third-party tools.
7
8 Changes in 3.0.0-0.RC4
9 ----------------------
10 * the config file name has changed to fetch-crl.conf, although a
11 fetch-crl.cnf file will also be used when present
12 * symlinked meta-data files can be ignored with the --nosymlinks option
13 (or nosymlinks in the configuration file). This allows fetch-crl to be
14 used effectively with new-format IGTF distribution before 1.37
15 * infinite loop for non-indexed CA file names fixed
16
17 Changes in fetch-crl 3.0
18 ------------------------
19 * fetch-crl 3.0 is a complete re-write, and shares no code with the 1.x and
20 2.x series utility of the same name, although the function and some of
21 the syntax is obviously the same
22
23 * support for multiple output formats: OpenSSL 1 in dual-hash mode, specific
24 DER and PEM outputs, and NSS databases
25 * support for multiple CRLs for a single CA, allowing more than one CA with
26 the same subject name but different CLRs. Review your client software to see
27 if and how these CRLs are used.
28 * stateful retrieval helps reduce bandwidth usage by caching the CRLs locally
29 and respecting the Cache Control headers sent by the web server hosting the
30 CRL. This can reduce the number of downloads
31 * support for HEAD-only requests when state preservation is used (initially
32 only retrieve HTTP headers, and only if the CRL actually changed to a full
33 download)
34 * support for more CRL retrieval protocols (file:// and ftp://)
35 * ability to try site-local URLs first, before relying on the URLs shipped with
36 the trust anchor. This allows building an explicit local caching (web) server.
37 * ability to specify additional URLs to try in case the URLs shipped with the
38 trust anchor were not responsive. This allows for automatic fall-back to
39 (local or global) mirror services for CRL downloads
40 * warnings and errors can be suppressed on a per-trust anchor basis, to allow
41 silencing for particularly unstable trust anchors
42 * aging tolerance (the delay time before errors are generated in case downloads
43 consistently fail) can be configured on a per-trust anchor basis
44 * parallel downloading for multiple trust anchors
45 * minimized use of temporary files in the file system (now limited to the
46 invocation of OpenSSL only, and only for brief periods of time)
47 * dependencies on wget, lynx and other unix utilities have been removed
48 * explicit web proxy support (using LWP http proxies)
49 * completely re-written in perl, with some (hopefully minimal) dependencies:
50 LWP, Sys::Syslog, POSIX. And Data::Dumper (when debugging is enabled),
51 and IO::Select (if parallel downloads are enabled).
52
53 Differences with respect to the previous versions
54
55 * when downloading CRLs via https, the server certificate is not checked,
56 neither for the correct DNS name nor for being issued by a valid CA. Since
57 the CRL in itself is signed, this is not a security vulnerability. If
58 stricter checking is anyway desired, and the Crypt::SSLeay perl module has
59 been installed, set the HTTPS_CA_FILE environment variable before invoking
60 fetch-crl -- but keep in mind that the DNS name verification is limited
61 and will (incorrectly) reject DNS names if these are listed only in the
62 subjectAlternativeName of the server certificate
63 * Existing files with a name that matches a CRL target name are overwritten,
64 even if they did not originally contain CRL data. In v2 this was configurable
65 via the FORCE_OVERWRITE configuration setting. In version 3, files are
66 overwritten by default, and this can no longer be configured.
67 * fetch-crl3 will no longer check CA certificates for consistency or validity
68 by themselves, only retrieved CRLs are verified
69
70 Downsides of the new version
71
72 * it requires perl5 to be installed (tested with perl 5.8.0 and higher) with
73 libwww-perl, whereas version 2 only required a traditional Bourne shell
74 * requires a version of OpenSSL (0.9.5a or better) to be installed. Needs
75 OpenSSL 1.0.0 (at least beta5) for dual-hash support.
76 * when using parallel downloads, it can only run on pure-POSIX systems
77 * parallelism in combination with the NSS database output format is not tested
78 * Even when only the NSS database output format has been selected, OpenSSL is
79 still needed for verification and processing
80
81
82 ==============================================================================
83
84 The change log below applies to the 1.x and 2.x series fetch-crl and is
85 included for historical purposes only. Fetch-crl3, with which this
86 changes file is being shipped, is a complete re-write of the utility.
87 Although a lot of backwards compatibility has been preserves, there have
88 been significant changes and the information below should NOT be used
89 to infer any behaviour of fetch-crl3.
90
91 Fetch-crl 1.x and 2.x were released under the EU DataGrid License.
92
93 Changes in version EGP 2.8.5
94 ----------------------------
95 (2010.06.03)
96
97 * fetch-crl was occasionally leaving behind {hash}.r0.XXXXXX.r0 files
98 This has been fixed in this release (patch thanks to Jason Smith, BNL)
99 * man page was not compliant to Debian guidelines, this has been fixed
100 (patch thanks to Mattias Ellert, Uppsala University)
101
102 Changes in version EGP 2.8.4
103 ----------------------------
104 (2010.04.04)
105
106 * Fixes error when randomWait is not set [RH Bug 579488]
107
108 Changes in version EGP 2.8.3
109 ----------------------------
110 (2010.03.28)
111
112 * Preserve SELinux context for CRL files if SElinux status program exists
113 and selinux is enabled (RH bug 577403)
114 * Fix argument parsing on syslog facility specification (RH bug 577387)
115 * Increase granularity of the RandomWait and allow for 0 in -r option
116
117 Changes in version EGP 2.8.2
118 ----------------------------
119 (2010.03.03)
120
121 * Improved support for multiple CRL URLs by downloading until a success
122 is achieved, instead of downloading all of them
123 * Imported randomwait patch from Steve Traylen
124
125 Changes in version EGP 2.8.1
126 ----------------------------
127 (2010.01.26)
128
129 * The installed CRL file is re-checked for validity to catch file system
130 errors and local disk corruption. When possible, it will try to restore
131 a backup copy. Failures are not subject to aging tolerance.
132
133 Changes in version EGP 2.8.0
134 ----------------------------
135 (2009.09.22)
136
137 * The RPM packaging has been overhauled and is now sufficiently conformant
138 to EPEL and FedoraProject guidelines.
139 * New init scripts and a cron job entry have been added to allow management
140 of fetch-crl via the chkconfig mechanism
141
142 These changes were contributed by Steve Traylen (CERN, Geneva, CH).
143
144 Changes in version EGP 2.7.0
145 ----------------------------
146 (2009.01.25)
147
148 * Warnings and errors are now counted. If there are errors in the download
149 or verification process for one or more CRLs, the exit status will be 1;
150 if there are errors in the local setup or in the script invocation, the
151 exit status will be 2.
152 * The installed CRLs no longer have the textual representation of the CRL,
153 but only the PEM data blob, thus reducing IO and memory requirements.
154 * the CRL aging threshold is now set by default to 24 hours. The previous
155 default was 0. The CRL aging threshold is set in the config file using
156 CRL_AGING_THRESHOLD=<xx>, or with the "-a" command-line argument.
157 * Default network timeouts reduced to 10 seconds (was 30) and retries to 2
158 * Added caching and conditional downloading. When CACHEDIR is set, the
159 original downloads are preserved and wget timestamping mode enabled.
160 When the content did not change, only the timestamp on the installed
161 CRL is updated. If SLOPPYCRLHASHES is set, the has is calculated based
162 on the name of the crl_url file, otherwise it is taken from the CRL itself.
163 - The CACHEDIR must be exclusively writable by the user running fetch-crl
164 - Setting CACHEDIR significantly reduced the bandwidth used by fetch-crl
165 * Added RESETPATHMODE setting in sysconfig. It defines whether or not to
166 set re-set $PATH to "/bin:/usr/bin" before start. The search for OpenSSL
167 may be done based on the old path.
168 yes=always replace; searchopenssl=search for openssl first and then reset;
169 no=keep original path, whatever that me be (may be empty if called from cron)
170 Default="yes". This replaces the hard-coded path in the tool!
171 * Hidden "FORCE_OVERWRITE" option now has a regular name. This is backwards-
172 compatible. Set FORCE_OVERWRITE=yes if you want files overwritten that
173 have a CRL-like name and ought to have CRL content, but currently do not.
174 * Addresses gLite Savannah bugs 28418 and 29559. Bug 27023 is partially
175 addressed. Bug 20062 can be remedied with WGET_OPTS arguments.
176 Addresses OSG ticket 4673.
177
178 Changes in version EGP 2.6.6
179 ----------------------------
180 (2007.09.16)
181 (version 2.5.5 is invalid and was not publicly released)
182
183 * Added obscure configuration parameter to allow overwriting of
184 arbitrary data files with a downloaded CRL (on request of
185 CERN, see https://savannah.cern.ch/bugs/index.php?29559)
186
187 Changes in version EGP 2.6.4
188 ----------------------------
189 (2007.08.15)
190
191 * Expired CA issuer certificate now gives a warning instead of an error
192 with the full verification result message
193 * additional logfile output target can be selected via the configuration file
194 * CRL aging threshold documented in manual page. Errors will now also be
195 generated in the CRL download failed consistently and the current CRL
196 has already expired
197
198 Changes in version EGP 2.6.3
199 ----------------------------
200 (2006.11.13)
201
202 * cron job example: fetch-crl invocation syntax error corrected
203
204 Changes in version EGP 2.6.2
205 ----------------------------
206 (2006.10.27)
207
208 * fixed bug: older wget versions do not recognise --no-check-certificate
209
210 Changes in version EGP 2.6.1
211 ----------------------------
212 (2006.10.25)
213
214 * fixed local timezone vs UTC error in LastUpdate CRL validation comparison
215 * fixed time comparison is the one-hour LastUpdate/download tolerance
216 (both fixes thanks to Alain Roy)
217 * added support for directory names containing whitespace
218 * added support for syslog reporting (via -f option or SYSLOGFACILITY directive)
219 * SERVERCERTCHECK=no is now the default. It can be reset via the configuration
220 file, or using the "--check-server-certificate" commandline option
221 * the main configuration file location (formerly fixed to be
222 /etc/sysconfig/fetch-crl) can now be set via the variable $FETCH_CRL_SYSCONFIG
223 * logfile format timestamp and tag have been normalised
224
225 Changes in version EGP 2.6
226 --------------------------
227 (2006.05.20)
228
229 * if the current local CRL has a lastUpdate time in the future, and the
230 newly downloaded CRL is older that the current one, allow the installation
231 of the newly downloaded CRL and issue a warning.
232 * added non-suppressable warning in case the newly downloaded CRL has a
233 lastUpdate time in the future, but install that CRL anyway (as the local
234 clock might have been wrong).
235
236 Changes in version EGP 2.5
237 --------------------------
238 (2006.01.16)
239
240 * added additional configuration arguments and configuration variables
241 to skip the server certificate check in wget
242 (to support https:// URLs where the server is authenticated with
243 a certificate that is not part of it's own trusted domain, such as
244 the KISTI URL)
245
246 Changes in version EGP 2.4
247 --------------------------
248 (2005.11.15)
249
250 * for those platforms that support the stat(1) command, and in case the
251 .crl_url file is named after the hash of the crl subject name to download,
252 error eporting for individual download errors can be suppressed for
253 a configurable amount of time as set via the "-a" option (unit: hours).
254
255 Changes in version EGP 2.3
256 --------------------------
257 (2005.11.05)
258
259 * do not replace recent CRLs with ones that have an older lastUpdate
260 timestamp (prevents ARP/DNS DoS attacks)
261
262 Changes in version EGP 2.2
263 --------------------------
264 (2005.10.27)
265
266 * secure http download by wget recognise the CAs in the trusted directory.
267 solves the issue described in the LCG bug tracking system
268 https://savannah.cern.ch/bugs/index.php?func=detailitem&item_id=12182
269
270 Changes in version EGP 2.1
271 --------------------------
272 (2005.08.12)
273 * specifically look for the most recent version of OpenSSL. The
274 one in GLOBUS_LOCATION (which used to take precedence in the
275 previous releases) is outdated in many cases and caused
276 troubles on the LCG production systems in validating v2 CRLs
277 * added manual page fetch-crl(8)
278
279 Changes in version EGP 2.0
280 --------------------------
281 (2005.02.28)
282 * name of the installed script changed to "fetch-crl"
283 * the cronjob script is no longer installed by default, but supplied
284 as an example in the %doc directory
285 * RPM is now relocatable (default install in /usr)
286 * READMA and CHANGES file now inclued in %doc tree
287 * make install now installs
288 * version increased to 2.0
289
290 Changes in version EGP 1.9
291 --------------------------
292 (2005.02.24)
293 * the content of the final target CRL file is now checked for
294 containing a valid CRL if it already exists. If it does not
295 contain a CRL, an error is displayed and the file left untouched
296 So making the final ".r0" file in ${outdir} a link to something else
297 will not work, preventing an escalation in the final stage.
298
299 Changes in version EGP 1.8
300 --------------------------
301 (changes from Fabio's version 1.7, 2005.02.24)
302
303 * All temporary files (the initial CRL download using wget
304 and the PEM-converted version of that file) are now created using
305 mktemp
306 * the RetrieveFileByURL function will not overwrite files that
307 have any data in them
308 * Note that the script can be run by a non-priviledged user, but
309 that the output directory must be made writable by that user
310 in an out-of-band way.
311
312 EDG version 1.7
313 ---------------
314 Imported with consent of Fabio Hernandez and Steve Traylen from
315 the original EDG repository.
316 The EU DataGrid License applies, see http://www.eu-datagrid.org/

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