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Revision 2188 - (hide annotations) (download)
Sun Feb 13 18:41:25 2011 UTC (10 years, 8 months ago) by davidg
Original Path: trunk/fetchcrl/CHANGES
File size: 15181 byte(s)
Now work even for CESNET

1 davidg 1758 ==============================================================================
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 davidg 2188 Changes in 3.0.5-1
9     ----------------------
10     * CRLs for multiple similarly-named trust anchors might not all be downloaded.
11     This is fixed in this release.
12     * Spurious "restoreLogMode" internal errors are no longer raised
13    
14 davidg 2085 Changes in 3.0.4-1
15     ----------------------
16     * Add support for directory based drop-in configuration in /etc/fetch-crl.d/
17     * Only use cached CRL contents if the nextUpdate time of the cached CRL is
18     still in the future. This will ensure that a new download is attempted
19     each and everytime for CRLs that have already expired.
20    
21 davidg 1924 Changes in 3.0.3-1
22     ----------------------
23     * Clean up of man page format macro PU (reported by Mattias Ellert)
24    
25 davidg 1922 Changes in 3.0.2-1
26     ----------------------
27     * Clean up of man page format macro PU (reported by Mattias Ellert)
28    
29 davidg 1901 Changes in 3.0.1-1
30     ----------------------
31     * hunts through more places to find the latest successful CRL download to
32     set the latest local modification time for a CRL
33     (resolves a comparison error in case output and infodir are unset)
34    
35 davidg 1878 Changes in 3.0.0-0.RC4
36     ----------------------
37     * the config file name has changed to fetch-crl.conf, although a
38     fetch-crl.cnf file will also be used when present
39     * symlinked meta-data files can be ignored with the --nosymlinks option
40     (or nosymlinks in the configuration file). This allows fetch-crl to be
41     used effectively with new-format IGTF distribution before 1.37
42     * infinite loop for non-indexed CA file names fixed
43    
44 davidg 1758 Changes in fetch-crl 3.0
45     ------------------------
46     * fetch-crl 3.0 is a complete re-write, and shares no code with the 1.x and
47     2.x series utility of the same name, although the function and some of
48     the syntax is obviously the same
49    
50     * support for multiple output formats: OpenSSL 1 in dual-hash mode, specific
51     DER and PEM outputs, and NSS databases
52     * support for multiple CRLs for a single CA, allowing more than one CA with
53     the same subject name but different CLRs. Review your client software to see
54     if and how these CRLs are used.
55     * stateful retrieval helps reduce bandwidth usage by caching the CRLs locally
56     and respecting the Cache Control headers sent by the web server hosting the
57     CRL. This can reduce the number of downloads
58     * support for HEAD-only requests when state preservation is used (initially
59     only retrieve HTTP headers, and only if the CRL actually changed to a full
60     download)
61     * support for more CRL retrieval protocols (file:// and ftp://)
62     * ability to try site-local URLs first, before relying on the URLs shipped with
63     the trust anchor. This allows building an explicit local caching (web) server.
64     * ability to specify additional URLs to try in case the URLs shipped with the
65     trust anchor were not responsive. This allows for automatic fall-back to
66     (local or global) mirror services for CRL downloads
67     * warnings and errors can be suppressed on a per-trust anchor basis, to allow
68     silencing for particularly unstable trust anchors
69     * aging tolerance (the delay time before errors are generated in case downloads
70     consistently fail) can be configured on a per-trust anchor basis
71     * parallel downloading for multiple trust anchors
72     * minimized use of temporary files in the file system (now limited to the
73     invocation of OpenSSL only, and only for brief periods of time)
74     * dependencies on wget, lynx and other unix utilities have been removed
75     * explicit web proxy support (using LWP http proxies)
76     * completely re-written in perl, with some (hopefully minimal) dependencies:
77     LWP, Sys::Syslog, POSIX. And Data::Dumper (when debugging is enabled),
78     and IO::Select (if parallel downloads are enabled).
79    
80     Differences with respect to the previous versions
81    
82     * when downloading CRLs via https, the server certificate is not checked,
83     neither for the correct DNS name nor for being issued by a valid CA. Since
84     the CRL in itself is signed, this is not a security vulnerability. If
85     stricter checking is anyway desired, and the Crypt::SSLeay perl module has
86     been installed, set the HTTPS_CA_FILE environment variable before invoking
87     fetch-crl -- but keep in mind that the DNS name verification is limited
88     and will (incorrectly) reject DNS names if these are listed only in the
89     subjectAlternativeName of the server certificate
90     * Existing files with a name that matches a CRL target name are overwritten,
91     even if they did not originally contain CRL data. In v2 this was configurable
92     via the FORCE_OVERWRITE configuration setting. In version 3, files are
93     overwritten by default, and this can no longer be configured.
94     * fetch-crl3 will no longer check CA certificates for consistency or validity
95     by themselves, only retrieved CRLs are verified
96    
97     Downsides of the new version
98    
99     * it requires perl5 to be installed (tested with perl 5.8.0 and higher) with
100     libwww-perl, whereas version 2 only required a traditional Bourne shell
101     * requires a version of OpenSSL (0.9.5a or better) to be installed. Needs
102     OpenSSL 1.0.0 (at least beta5) for dual-hash support.
103     * when using parallel downloads, it can only run on pure-POSIX systems
104     * parallelism in combination with the NSS database output format is not tested
105     * Even when only the NSS database output format has been selected, OpenSSL is
106     still needed for verification and processing
107    
108    
109     ==============================================================================
110    
111     The change log below applies to the 1.x and 2.x series fetch-crl and is
112     included for historical purposes only. Fetch-crl3, with which this
113     changes file is being shipped, is a complete re-write of the utility.
114     Although a lot of backwards compatibility has been preserves, there have
115     been significant changes and the information below should NOT be used
116     to infer any behaviour of fetch-crl3.
117    
118     Fetch-crl 1.x and 2.x were released under the EU DataGrid License.
119    
120     Changes in version EGP 2.8.5
121     ----------------------------
122     (2010.06.03)
123    
124     * fetch-crl was occasionally leaving behind {hash}.r0.XXXXXX.r0 files
125     This has been fixed in this release (patch thanks to Jason Smith, BNL)
126     * man page was not compliant to Debian guidelines, this has been fixed
127     (patch thanks to Mattias Ellert, Uppsala University)
128    
129     Changes in version EGP 2.8.4
130     ----------------------------
131     (2010.04.04)
132    
133     * Fixes error when randomWait is not set [RH Bug 579488]
134    
135     Changes in version EGP 2.8.3
136     ----------------------------
137     (2010.03.28)
138    
139     * Preserve SELinux context for CRL files if SElinux status program exists
140     and selinux is enabled (RH bug 577403)
141     * Fix argument parsing on syslog facility specification (RH bug 577387)
142     * Increase granularity of the RandomWait and allow for 0 in -r option
143    
144     Changes in version EGP 2.8.2
145     ----------------------------
146     (2010.03.03)
147    
148     * Improved support for multiple CRL URLs by downloading until a success
149     is achieved, instead of downloading all of them
150     * Imported randomwait patch from Steve Traylen
151    
152     Changes in version EGP 2.8.1
153     ----------------------------
154     (2010.01.26)
155    
156     * The installed CRL file is re-checked for validity to catch file system
157     errors and local disk corruption. When possible, it will try to restore
158     a backup copy. Failures are not subject to aging tolerance.
159    
160     Changes in version EGP 2.8.0
161     ----------------------------
162     (2009.09.22)
163    
164     * The RPM packaging has been overhauled and is now sufficiently conformant
165     to EPEL and FedoraProject guidelines.
166     * New init scripts and a cron job entry have been added to allow management
167     of fetch-crl via the chkconfig mechanism
168    
169     These changes were contributed by Steve Traylen (CERN, Geneva, CH).
170    
171     Changes in version EGP 2.7.0
172     ----------------------------
173     (2009.01.25)
174    
175     * Warnings and errors are now counted. If there are errors in the download
176     or verification process for one or more CRLs, the exit status will be 1;
177     if there are errors in the local setup or in the script invocation, the
178     exit status will be 2.
179     * The installed CRLs no longer have the textual representation of the CRL,
180     but only the PEM data blob, thus reducing IO and memory requirements.
181     * the CRL aging threshold is now set by default to 24 hours. The previous
182     default was 0. The CRL aging threshold is set in the config file using
183     CRL_AGING_THRESHOLD=<xx>, or with the "-a" command-line argument.
184     * Default network timeouts reduced to 10 seconds (was 30) and retries to 2
185     * Added caching and conditional downloading. When CACHEDIR is set, the
186     original downloads are preserved and wget timestamping mode enabled.
187     When the content did not change, only the timestamp on the installed
188     CRL is updated. If SLOPPYCRLHASHES is set, the has is calculated based
189     on the name of the crl_url file, otherwise it is taken from the CRL itself.
190     - The CACHEDIR must be exclusively writable by the user running fetch-crl
191     - Setting CACHEDIR significantly reduced the bandwidth used by fetch-crl
192     * Added RESETPATHMODE setting in sysconfig. It defines whether or not to
193     set re-set $PATH to "/bin:/usr/bin" before start. The search for OpenSSL
194     may be done based on the old path.
195     yes=always replace; searchopenssl=search for openssl first and then reset;
196     no=keep original path, whatever that me be (may be empty if called from cron)
197     Default="yes". This replaces the hard-coded path in the tool!
198     * Hidden "FORCE_OVERWRITE" option now has a regular name. This is backwards-
199     compatible. Set FORCE_OVERWRITE=yes if you want files overwritten that
200     have a CRL-like name and ought to have CRL content, but currently do not.
201     * Addresses gLite Savannah bugs 28418 and 29559. Bug 27023 is partially
202     addressed. Bug 20062 can be remedied with WGET_OPTS arguments.
203     Addresses OSG ticket 4673.
204    
205     Changes in version EGP 2.6.6
206     ----------------------------
207     (2007.09.16)
208     (version 2.5.5 is invalid and was not publicly released)
209    
210     * Added obscure configuration parameter to allow overwriting of
211     arbitrary data files with a downloaded CRL (on request of
212     CERN, see https://savannah.cern.ch/bugs/index.php?29559)
213    
214     Changes in version EGP 2.6.4
215     ----------------------------
216     (2007.08.15)
217    
218     * Expired CA issuer certificate now gives a warning instead of an error
219     with the full verification result message
220     * additional logfile output target can be selected via the configuration file
221     * CRL aging threshold documented in manual page. Errors will now also be
222     generated in the CRL download failed consistently and the current CRL
223     has already expired
224    
225     Changes in version EGP 2.6.3
226     ----------------------------
227     (2006.11.13)
228    
229     * cron job example: fetch-crl invocation syntax error corrected
230    
231     Changes in version EGP 2.6.2
232     ----------------------------
233     (2006.10.27)
234    
235     * fixed bug: older wget versions do not recognise --no-check-certificate
236    
237     Changes in version EGP 2.6.1
238     ----------------------------
239     (2006.10.25)
240    
241     * fixed local timezone vs UTC error in LastUpdate CRL validation comparison
242     * fixed time comparison is the one-hour LastUpdate/download tolerance
243     (both fixes thanks to Alain Roy)
244     * added support for directory names containing whitespace
245     * added support for syslog reporting (via -f option or SYSLOGFACILITY directive)
246     * SERVERCERTCHECK=no is now the default. It can be reset via the configuration
247     file, or using the "--check-server-certificate" commandline option
248     * the main configuration file location (formerly fixed to be
249     /etc/sysconfig/fetch-crl) can now be set via the variable $FETCH_CRL_SYSCONFIG
250     * logfile format timestamp and tag have been normalised
251    
252     Changes in version EGP 2.6
253     --------------------------
254     (2006.05.20)
255    
256     * if the current local CRL has a lastUpdate time in the future, and the
257     newly downloaded CRL is older that the current one, allow the installation
258     of the newly downloaded CRL and issue a warning.
259     * added non-suppressable warning in case the newly downloaded CRL has a
260     lastUpdate time in the future, but install that CRL anyway (as the local
261     clock might have been wrong).
262    
263     Changes in version EGP 2.5
264     --------------------------
265     (2006.01.16)
266    
267     * added additional configuration arguments and configuration variables
268     to skip the server certificate check in wget
269     (to support https:// URLs where the server is authenticated with
270     a certificate that is not part of it's own trusted domain, such as
271     the KISTI URL)
272    
273     Changes in version EGP 2.4
274     --------------------------
275     (2005.11.15)
276    
277     * for those platforms that support the stat(1) command, and in case the
278     .crl_url file is named after the hash of the crl subject name to download,
279     error eporting for individual download errors can be suppressed for
280     a configurable amount of time as set via the "-a" option (unit: hours).
281    
282     Changes in version EGP 2.3
283     --------------------------
284     (2005.11.05)
285    
286     * do not replace recent CRLs with ones that have an older lastUpdate
287     timestamp (prevents ARP/DNS DoS attacks)
288    
289     Changes in version EGP 2.2
290     --------------------------
291     (2005.10.27)
292    
293     * secure http download by wget recognise the CAs in the trusted directory.
294     solves the issue described in the LCG bug tracking system
295     https://savannah.cern.ch/bugs/index.php?func=detailitem&item_id=12182
296    
297     Changes in version EGP 2.1
298     --------------------------
299     (2005.08.12)
300     * specifically look for the most recent version of OpenSSL. The
301     one in GLOBUS_LOCATION (which used to take precedence in the
302     previous releases) is outdated in many cases and caused
303     troubles on the LCG production systems in validating v2 CRLs
304     * added manual page fetch-crl(8)
305    
306     Changes in version EGP 2.0
307     --------------------------
308     (2005.02.28)
309     * name of the installed script changed to "fetch-crl"
310     * the cronjob script is no longer installed by default, but supplied
311     as an example in the %doc directory
312     * RPM is now relocatable (default install in /usr)
313     * READMA and CHANGES file now inclued in %doc tree
314     * make install now installs
315     * version increased to 2.0
316    
317     Changes in version EGP 1.9
318     --------------------------
319     (2005.02.24)
320     * the content of the final target CRL file is now checked for
321     containing a valid CRL if it already exists. If it does not
322     contain a CRL, an error is displayed and the file left untouched
323     So making the final ".r0" file in ${outdir} a link to something else
324     will not work, preventing an escalation in the final stage.
325    
326     Changes in version EGP 1.8
327     --------------------------
328     (changes from Fabio's version 1.7, 2005.02.24)
329    
330     * All temporary files (the initial CRL download using wget
331     and the PEM-converted version of that file) are now created using
332     mktemp
333     * the RetrieveFileByURL function will not overwrite files that
334     have any data in them
335     * Note that the script can be run by a non-priviledged user, but
336     that the output directory must be made writable by that user
337     in an out-of-band way.
338    
339     EDG version 1.7
340     ---------------
341     Imported with consent of Fabio Hernandez and Steve Traylen from
342     the original EDG repository.
343     The EU DataGrid License applies, see http://www.eu-datagrid.org/

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