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Revision 2639 - (hide annotations) (download)
Mon Jul 1 09:21:55 2013 UTC (8 years, 5 months ago) by davidg
File size: 16614 byte(s)
Updated documentation and man page, for inclusion in 3.0.11

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 2639 Changes in 3.0.11-1
9     ----------------------
10     * Added reference to /etc/fetch-crl.d/ to the man page, used shortened URL
11     to full documentation in man page
12    
13 davidg 2608 Changes in 3.0.10-1
14     ----------------------
15     * Added a "noquiet" option in the configuration file that will override
16     the default single "-q" option in the cro-job that is shipped with
17     the fetch-crl3 init scripts (feature request by Ryan Taylor)
18     * Added option "--inet6glue" and "inet6glue" config setting to load
19 davidg 2609 the Net::INET6Glue perl module (if it is available) to use IPv6
20 davidg 2608 connections in LWP to download CRLs
21    
22 davidg 2433 Changes in 3.0.8-1
23     ----------------------
24     * Trust anchor name inferrence based on retrieved-CRL added as option (at cost
25     of retrieving CRL even if there is no accompanying trust anchor found later)
26     Option is disabled by default, but can be enabled by using @HASH@ in the
27     ca-template name list. (feature request by Rob van der Wal, SARA, NL)
28    
29 davidg 2305 Changes in 3.0.7-1
30     ----------------------
31     * CRL modofication time heuristic inadvertently modified file name templates
32     (solves issue kindly reported by Elan Ruusamae)
33     * Expanded representation of tokenisation characters in strings to work
34     around bug in file(1) (rhbz#699546, works around RedHat Bugzilla 699548)
35    
36 davidg 2233 Changes in 3.0.6-1
37     ----------------------
38     * Response parsing disabled to suppress superfluous warning on unexpected
39     UTF-8 respons when retrieving a CRL (solves RedHat Bugzilla 688902)
40    
41 davidg 2188 Changes in 3.0.5-1
42     ----------------------
43     * CRLs for multiple similarly-named trust anchors might not all be downloaded.
44     This is fixed in this release.
45     * Spurious "restoreLogMode" internal errors are no longer raised
46    
47 davidg 2085 Changes in 3.0.4-1
48     ----------------------
49     * Add support for directory based drop-in configuration in /etc/fetch-crl.d/
50     * Only use cached CRL contents if the nextUpdate time of the cached CRL is
51     still in the future. This will ensure that a new download is attempted
52     each and everytime for CRLs that have already expired.
53    
54 davidg 1924 Changes in 3.0.3-1
55     ----------------------
56     * Clean up of man page format macro PU (reported by Mattias Ellert)
57    
58 davidg 1922 Changes in 3.0.2-1
59     ----------------------
60     * Clean up of man page format macro PU (reported by Mattias Ellert)
61    
62 davidg 1901 Changes in 3.0.1-1
63     ----------------------
64     * hunts through more places to find the latest successful CRL download to
65     set the latest local modification time for a CRL
66     (resolves a comparison error in case output and infodir are unset)
67    
68 davidg 1878 Changes in 3.0.0-0.RC4
69     ----------------------
70     * the config file name has changed to fetch-crl.conf, although a
71     fetch-crl.cnf file will also be used when present
72     * symlinked meta-data files can be ignored with the --nosymlinks option
73     (or nosymlinks in the configuration file). This allows fetch-crl to be
74     used effectively with new-format IGTF distribution before 1.37
75     * infinite loop for non-indexed CA file names fixed
76    
77 davidg 1758 Changes in fetch-crl 3.0
78     ------------------------
79     * fetch-crl 3.0 is a complete re-write, and shares no code with the 1.x and
80     2.x series utility of the same name, although the function and some of
81     the syntax is obviously the same
82    
83     * support for multiple output formats: OpenSSL 1 in dual-hash mode, specific
84     DER and PEM outputs, and NSS databases
85     * support for multiple CRLs for a single CA, allowing more than one CA with
86     the same subject name but different CLRs. Review your client software to see
87     if and how these CRLs are used.
88     * stateful retrieval helps reduce bandwidth usage by caching the CRLs locally
89     and respecting the Cache Control headers sent by the web server hosting the
90     CRL. This can reduce the number of downloads
91     * support for HEAD-only requests when state preservation is used (initially
92     only retrieve HTTP headers, and only if the CRL actually changed to a full
93     download)
94     * support for more CRL retrieval protocols (file:// and ftp://)
95     * ability to try site-local URLs first, before relying on the URLs shipped with
96     the trust anchor. This allows building an explicit local caching (web) server.
97     * ability to specify additional URLs to try in case the URLs shipped with the
98     trust anchor were not responsive. This allows for automatic fall-back to
99     (local or global) mirror services for CRL downloads
100     * warnings and errors can be suppressed on a per-trust anchor basis, to allow
101     silencing for particularly unstable trust anchors
102     * aging tolerance (the delay time before errors are generated in case downloads
103     consistently fail) can be configured on a per-trust anchor basis
104     * parallel downloading for multiple trust anchors
105     * minimized use of temporary files in the file system (now limited to the
106     invocation of OpenSSL only, and only for brief periods of time)
107     * dependencies on wget, lynx and other unix utilities have been removed
108     * explicit web proxy support (using LWP http proxies)
109     * completely re-written in perl, with some (hopefully minimal) dependencies:
110     LWP, Sys::Syslog, POSIX. And Data::Dumper (when debugging is enabled),
111     and IO::Select (if parallel downloads are enabled).
112    
113     Differences with respect to the previous versions
114    
115     * when downloading CRLs via https, the server certificate is not checked,
116     neither for the correct DNS name nor for being issued by a valid CA. Since
117     the CRL in itself is signed, this is not a security vulnerability. If
118     stricter checking is anyway desired, and the Crypt::SSLeay perl module has
119     been installed, set the HTTPS_CA_FILE environment variable before invoking
120     fetch-crl -- but keep in mind that the DNS name verification is limited
121     and will (incorrectly) reject DNS names if these are listed only in the
122     subjectAlternativeName of the server certificate
123     * Existing files with a name that matches a CRL target name are overwritten,
124     even if they did not originally contain CRL data. In v2 this was configurable
125     via the FORCE_OVERWRITE configuration setting. In version 3, files are
126     overwritten by default, and this can no longer be configured.
127     * fetch-crl3 will no longer check CA certificates for consistency or validity
128     by themselves, only retrieved CRLs are verified
129    
130     Downsides of the new version
131    
132     * it requires perl5 to be installed (tested with perl 5.8.0 and higher) with
133     libwww-perl, whereas version 2 only required a traditional Bourne shell
134     * requires a version of OpenSSL (0.9.5a or better) to be installed. Needs
135     OpenSSL 1.0.0 (at least beta5) for dual-hash support.
136     * when using parallel downloads, it can only run on pure-POSIX systems
137     * parallelism in combination with the NSS database output format is not tested
138     * Even when only the NSS database output format has been selected, OpenSSL is
139     still needed for verification and processing
140    
141    
142     ==============================================================================
143    
144     The change log below applies to the 1.x and 2.x series fetch-crl and is
145     included for historical purposes only. Fetch-crl3, with which this
146     changes file is being shipped, is a complete re-write of the utility.
147     Although a lot of backwards compatibility has been preserves, there have
148     been significant changes and the information below should NOT be used
149     to infer any behaviour of fetch-crl3.
150    
151     Fetch-crl 1.x and 2.x were released under the EU DataGrid License.
152    
153     Changes in version EGP 2.8.5
154     ----------------------------
155     (2010.06.03)
156    
157     * fetch-crl was occasionally leaving behind {hash}.r0.XXXXXX.r0 files
158     This has been fixed in this release (patch thanks to Jason Smith, BNL)
159     * man page was not compliant to Debian guidelines, this has been fixed
160     (patch thanks to Mattias Ellert, Uppsala University)
161    
162     Changes in version EGP 2.8.4
163     ----------------------------
164     (2010.04.04)
165    
166     * Fixes error when randomWait is not set [RH Bug 579488]
167    
168     Changes in version EGP 2.8.3
169     ----------------------------
170     (2010.03.28)
171    
172     * Preserve SELinux context for CRL files if SElinux status program exists
173     and selinux is enabled (RH bug 577403)
174     * Fix argument parsing on syslog facility specification (RH bug 577387)
175     * Increase granularity of the RandomWait and allow for 0 in -r option
176    
177     Changes in version EGP 2.8.2
178     ----------------------------
179     (2010.03.03)
180    
181     * Improved support for multiple CRL URLs by downloading until a success
182     is achieved, instead of downloading all of them
183     * Imported randomwait patch from Steve Traylen
184    
185     Changes in version EGP 2.8.1
186     ----------------------------
187     (2010.01.26)
188    
189     * The installed CRL file is re-checked for validity to catch file system
190     errors and local disk corruption. When possible, it will try to restore
191     a backup copy. Failures are not subject to aging tolerance.
192    
193     Changes in version EGP 2.8.0
194     ----------------------------
195     (2009.09.22)
196    
197     * The RPM packaging has been overhauled and is now sufficiently conformant
198     to EPEL and FedoraProject guidelines.
199     * New init scripts and a cron job entry have been added to allow management
200     of fetch-crl via the chkconfig mechanism
201    
202     These changes were contributed by Steve Traylen (CERN, Geneva, CH).
203    
204     Changes in version EGP 2.7.0
205     ----------------------------
206     (2009.01.25)
207    
208     * Warnings and errors are now counted. If there are errors in the download
209     or verification process for one or more CRLs, the exit status will be 1;
210     if there are errors in the local setup or in the script invocation, the
211     exit status will be 2.
212     * The installed CRLs no longer have the textual representation of the CRL,
213     but only the PEM data blob, thus reducing IO and memory requirements.
214     * the CRL aging threshold is now set by default to 24 hours. The previous
215     default was 0. The CRL aging threshold is set in the config file using
216     CRL_AGING_THRESHOLD=<xx>, or with the "-a" command-line argument.
217     * Default network timeouts reduced to 10 seconds (was 30) and retries to 2
218     * Added caching and conditional downloading. When CACHEDIR is set, the
219     original downloads are preserved and wget timestamping mode enabled.
220     When the content did not change, only the timestamp on the installed
221     CRL is updated. If SLOPPYCRLHASHES is set, the has is calculated based
222     on the name of the crl_url file, otherwise it is taken from the CRL itself.
223     - The CACHEDIR must be exclusively writable by the user running fetch-crl
224     - Setting CACHEDIR significantly reduced the bandwidth used by fetch-crl
225     * Added RESETPATHMODE setting in sysconfig. It defines whether or not to
226     set re-set $PATH to "/bin:/usr/bin" before start. The search for OpenSSL
227     may be done based on the old path.
228     yes=always replace; searchopenssl=search for openssl first and then reset;
229     no=keep original path, whatever that me be (may be empty if called from cron)
230     Default="yes". This replaces the hard-coded path in the tool!
231     * Hidden "FORCE_OVERWRITE" option now has a regular name. This is backwards-
232     compatible. Set FORCE_OVERWRITE=yes if you want files overwritten that
233     have a CRL-like name and ought to have CRL content, but currently do not.
234     * Addresses gLite Savannah bugs 28418 and 29559. Bug 27023 is partially
235     addressed. Bug 20062 can be remedied with WGET_OPTS arguments.
236     Addresses OSG ticket 4673.
237    
238     Changes in version EGP 2.6.6
239     ----------------------------
240     (2007.09.16)
241     (version 2.5.5 is invalid and was not publicly released)
242    
243     * Added obscure configuration parameter to allow overwriting of
244     arbitrary data files with a downloaded CRL (on request of
245     CERN, see https://savannah.cern.ch/bugs/index.php?29559)
246    
247     Changes in version EGP 2.6.4
248     ----------------------------
249     (2007.08.15)
250    
251     * Expired CA issuer certificate now gives a warning instead of an error
252     with the full verification result message
253     * additional logfile output target can be selected via the configuration file
254     * CRL aging threshold documented in manual page. Errors will now also be
255     generated in the CRL download failed consistently and the current CRL
256     has already expired
257    
258     Changes in version EGP 2.6.3
259     ----------------------------
260     (2006.11.13)
261    
262     * cron job example: fetch-crl invocation syntax error corrected
263    
264     Changes in version EGP 2.6.2
265     ----------------------------
266     (2006.10.27)
267    
268     * fixed bug: older wget versions do not recognise --no-check-certificate
269    
270     Changes in version EGP 2.6.1
271     ----------------------------
272     (2006.10.25)
273    
274     * fixed local timezone vs UTC error in LastUpdate CRL validation comparison
275     * fixed time comparison is the one-hour LastUpdate/download tolerance
276     (both fixes thanks to Alain Roy)
277     * added support for directory names containing whitespace
278     * added support for syslog reporting (via -f option or SYSLOGFACILITY directive)
279     * SERVERCERTCHECK=no is now the default. It can be reset via the configuration
280     file, or using the "--check-server-certificate" commandline option
281     * the main configuration file location (formerly fixed to be
282     /etc/sysconfig/fetch-crl) can now be set via the variable $FETCH_CRL_SYSCONFIG
283     * logfile format timestamp and tag have been normalised
284    
285     Changes in version EGP 2.6
286     --------------------------
287     (2006.05.20)
288    
289     * if the current local CRL has a lastUpdate time in the future, and the
290     newly downloaded CRL is older that the current one, allow the installation
291     of the newly downloaded CRL and issue a warning.
292     * added non-suppressable warning in case the newly downloaded CRL has a
293     lastUpdate time in the future, but install that CRL anyway (as the local
294     clock might have been wrong).
295    
296     Changes in version EGP 2.5
297     --------------------------
298     (2006.01.16)
299    
300     * added additional configuration arguments and configuration variables
301     to skip the server certificate check in wget
302     (to support https:// URLs where the server is authenticated with
303     a certificate that is not part of it's own trusted domain, such as
304     the KISTI URL)
305    
306     Changes in version EGP 2.4
307     --------------------------
308     (2005.11.15)
309    
310     * for those platforms that support the stat(1) command, and in case the
311     .crl_url file is named after the hash of the crl subject name to download,
312     error eporting for individual download errors can be suppressed for
313     a configurable amount of time as set via the "-a" option (unit: hours).
314    
315     Changes in version EGP 2.3
316     --------------------------
317     (2005.11.05)
318    
319     * do not replace recent CRLs with ones that have an older lastUpdate
320     timestamp (prevents ARP/DNS DoS attacks)
321    
322     Changes in version EGP 2.2
323     --------------------------
324     (2005.10.27)
325    
326     * secure http download by wget recognise the CAs in the trusted directory.
327     solves the issue described in the LCG bug tracking system
328     https://savannah.cern.ch/bugs/index.php?func=detailitem&item_id=12182
329    
330     Changes in version EGP 2.1
331     --------------------------
332     (2005.08.12)
333     * specifically look for the most recent version of OpenSSL. The
334     one in GLOBUS_LOCATION (which used to take precedence in the
335     previous releases) is outdated in many cases and caused
336     troubles on the LCG production systems in validating v2 CRLs
337     * added manual page fetch-crl(8)
338    
339     Changes in version EGP 2.0
340     --------------------------
341     (2005.02.28)
342     * name of the installed script changed to "fetch-crl"
343     * the cronjob script is no longer installed by default, but supplied
344     as an example in the %doc directory
345     * RPM is now relocatable (default install in /usr)
346     * READMA and CHANGES file now inclued in %doc tree
347     * make install now installs
348     * version increased to 2.0
349    
350     Changes in version EGP 1.9
351     --------------------------
352     (2005.02.24)
353     * the content of the final target CRL file is now checked for
354     containing a valid CRL if it already exists. If it does not
355     contain a CRL, an error is displayed and the file left untouched
356     So making the final ".r0" file in ${outdir} a link to something else
357     will not work, preventing an escalation in the final stage.
358    
359     Changes in version EGP 1.8
360     --------------------------
361     (changes from Fabio's version 1.7, 2005.02.24)
362    
363     * All temporary files (the initial CRL download using wget
364     and the PEM-converted version of that file) are now created using
365     mktemp
366     * the RetrieveFileByURL function will not overwrite files that
367     have any data in them
368     * Note that the script can be run by a non-priviledged user, but
369     that the output directory must be made writable by that user
370     in an out-of-band way.
371    
372     EDG version 1.7
373     ---------------
374     Imported with consent of Fabio Hernandez and Steve Traylen from
375     the original EDG repository.
376     The EU DataGrid License applies, see http://www.eu-datagrid.org/

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