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Revision 3171 - (hide annotations) (download)
Mon Mar 20 15:18:37 2017 UTC (4 years, 7 months ago) by davidg
File size: 18544 byte(s)
Add description of fixes in 18 and 19

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 3171 Changes in 3.0.19-1
9     ----------------------
10     * Do not add spurious newline to DER-format files (fixes report 201670320-01)
11    
12     Changes in 3.0.18-1
13     ----------------------
14     * run a script after the completion of every fetch-crl run (uses postexec
15     directive in config file)
16    
17 davidg 2804 Changes in 3.0.17-1
18     ----------------------
19     * Add optional cache-control max-age headers in all requests to hint a
20     maximum caching time to intermediate servers (bugzilla #26)
21    
22 davidg 2783 Changes in 3.0.16-1
23     ----------------------
24     * Added cache state freshness constraints (default maxcachetime set to 96hrs)
25     * Re-set cache expiry of state data if CRL nextUpdate is within or beyond
26     7 hrs (config "expirestolerance") claimed URL Expiry or Cache-control max-age
27    
28 davidg 2761 Changes in 3.0.15-1
29     ----------------------
30     * Fixed issues resulting in undefined attribute values to be returned for CRL
31    
32 davidg 2715 Changes in 3.0.14-1
33     ----------------------
34     * Requesting CRL retrieval for an empty trust anchor store is now a warning
35     and no longer an error
36    
37 davidg 2690 Changes in 3.0.13-1
38     ----------------------
39     * Supplied system init script for boot phase will not re-run inadvertently
40 davidg 2693 * Add rcmode config option (added differentiated reporting and success-on-
41     solely-retrieval-errors)
42     * Add --define key=val command line argument to augment configuration data
43 davidg 2694 * Setting FETCHCRL_OPTIONS in /etc/sysconfig/fetch-crl will add these
44     options to the commandline of fetch-crl on start from cron or at boot time
45     Setting FETCHCRL_BOOT_OPTIONS adds them to the boot init script only
46     (e.g. FETCHCRLBOOTOPTIONS="--define rcmode=differentiated")
47     and FETCHCRL_CRON_OPTIONS does the same only for the cron job script
48 davidg 2690
49 davidg 2672 Changes in 3.0.12-1
50     ----------------------
51     * PEM formatted CRLs now always include a final newline character (fix
52     provided by Harald Barth <haba@kth.se>)
53    
54 davidg 2639 Changes in 3.0.11-1
55     ----------------------
56     * Added reference to /etc/fetch-crl.d/ to the man page, used shortened URL
57     to full documentation in man page
58 davidg 2648 * Added version information to help output and added -V option
59     * Added a dangerous clean-crl script to remove stale .r* files (beware!)
60 davidg 2639
61 davidg 2608 Changes in 3.0.10-1
62     ----------------------
63     * Added a "noquiet" option in the configuration file that will override
64     the default single "-q" option in the cro-job that is shipped with
65     the fetch-crl3 init scripts (feature request by Ryan Taylor)
66     * Added option "--inet6glue" and "inet6glue" config setting to load
67 davidg 2609 the Net::INET6Glue perl module (if it is available) to use IPv6
68 davidg 2608 connections in LWP to download CRLs
69    
70 davidg 2433 Changes in 3.0.8-1
71     ----------------------
72     * Trust anchor name inferrence based on retrieved-CRL added as option (at cost
73     of retrieving CRL even if there is no accompanying trust anchor found later)
74     Option is disabled by default, but can be enabled by using @HASH@ in the
75     ca-template name list. (feature request by Rob van der Wal, SARA, NL)
76    
77 davidg 2305 Changes in 3.0.7-1
78     ----------------------
79     * CRL modofication time heuristic inadvertently modified file name templates
80     (solves issue kindly reported by Elan Ruusamae)
81     * Expanded representation of tokenisation characters in strings to work
82     around bug in file(1) (rhbz#699546, works around RedHat Bugzilla 699548)
83    
84 davidg 2233 Changes in 3.0.6-1
85     ----------------------
86     * Response parsing disabled to suppress superfluous warning on unexpected
87     UTF-8 respons when retrieving a CRL (solves RedHat Bugzilla 688902)
88    
89 davidg 2188 Changes in 3.0.5-1
90     ----------------------
91     * CRLs for multiple similarly-named trust anchors might not all be downloaded.
92     This is fixed in this release.
93     * Spurious "restoreLogMode" internal errors are no longer raised
94    
95 davidg 2085 Changes in 3.0.4-1
96     ----------------------
97     * Add support for directory based drop-in configuration in /etc/fetch-crl.d/
98     * Only use cached CRL contents if the nextUpdate time of the cached CRL is
99     still in the future. This will ensure that a new download is attempted
100     each and everytime for CRLs that have already expired.
101    
102 davidg 1924 Changes in 3.0.3-1
103     ----------------------
104     * Clean up of man page format macro PU (reported by Mattias Ellert)
105    
106 davidg 1922 Changes in 3.0.2-1
107     ----------------------
108     * Clean up of man page format macro PU (reported by Mattias Ellert)
109    
110 davidg 1901 Changes in 3.0.1-1
111     ----------------------
112     * hunts through more places to find the latest successful CRL download to
113     set the latest local modification time for a CRL
114     (resolves a comparison error in case output and infodir are unset)
115    
116 davidg 1878 Changes in 3.0.0-0.RC4
117     ----------------------
118     * the config file name has changed to fetch-crl.conf, although a
119     fetch-crl.cnf file will also be used when present
120     * symlinked meta-data files can be ignored with the --nosymlinks option
121     (or nosymlinks in the configuration file). This allows fetch-crl to be
122     used effectively with new-format IGTF distribution before 1.37
123     * infinite loop for non-indexed CA file names fixed
124    
125 davidg 1758 Changes in fetch-crl 3.0
126     ------------------------
127     * fetch-crl 3.0 is a complete re-write, and shares no code with the 1.x and
128     2.x series utility of the same name, although the function and some of
129     the syntax is obviously the same
130    
131     * support for multiple output formats: OpenSSL 1 in dual-hash mode, specific
132     DER and PEM outputs, and NSS databases
133     * support for multiple CRLs for a single CA, allowing more than one CA with
134     the same subject name but different CLRs. Review your client software to see
135     if and how these CRLs are used.
136     * stateful retrieval helps reduce bandwidth usage by caching the CRLs locally
137     and respecting the Cache Control headers sent by the web server hosting the
138     CRL. This can reduce the number of downloads
139     * support for HEAD-only requests when state preservation is used (initially
140     only retrieve HTTP headers, and only if the CRL actually changed to a full
141     download)
142     * support for more CRL retrieval protocols (file:// and ftp://)
143     * ability to try site-local URLs first, before relying on the URLs shipped with
144     the trust anchor. This allows building an explicit local caching (web) server.
145     * ability to specify additional URLs to try in case the URLs shipped with the
146     trust anchor were not responsive. This allows for automatic fall-back to
147     (local or global) mirror services for CRL downloads
148     * warnings and errors can be suppressed on a per-trust anchor basis, to allow
149     silencing for particularly unstable trust anchors
150     * aging tolerance (the delay time before errors are generated in case downloads
151     consistently fail) can be configured on a per-trust anchor basis
152     * parallel downloading for multiple trust anchors
153     * minimized use of temporary files in the file system (now limited to the
154     invocation of OpenSSL only, and only for brief periods of time)
155     * dependencies on wget, lynx and other unix utilities have been removed
156     * explicit web proxy support (using LWP http proxies)
157     * completely re-written in perl, with some (hopefully minimal) dependencies:
158     LWP, Sys::Syslog, POSIX. And Data::Dumper (when debugging is enabled),
159     and IO::Select (if parallel downloads are enabled).
160    
161     Differences with respect to the previous versions
162    
163     * when downloading CRLs via https, the server certificate is not checked,
164     neither for the correct DNS name nor for being issued by a valid CA. Since
165     the CRL in itself is signed, this is not a security vulnerability. If
166     stricter checking is anyway desired, and the Crypt::SSLeay perl module has
167     been installed, set the HTTPS_CA_FILE environment variable before invoking
168     fetch-crl -- but keep in mind that the DNS name verification is limited
169     and will (incorrectly) reject DNS names if these are listed only in the
170     subjectAlternativeName of the server certificate
171     * Existing files with a name that matches a CRL target name are overwritten,
172     even if they did not originally contain CRL data. In v2 this was configurable
173     via the FORCE_OVERWRITE configuration setting. In version 3, files are
174     overwritten by default, and this can no longer be configured.
175     * fetch-crl3 will no longer check CA certificates for consistency or validity
176     by themselves, only retrieved CRLs are verified
177    
178     Downsides of the new version
179    
180     * it requires perl5 to be installed (tested with perl 5.8.0 and higher) with
181     libwww-perl, whereas version 2 only required a traditional Bourne shell
182     * requires a version of OpenSSL (0.9.5a or better) to be installed. Needs
183     OpenSSL 1.0.0 (at least beta5) for dual-hash support.
184     * when using parallel downloads, it can only run on pure-POSIX systems
185     * parallelism in combination with the NSS database output format is not tested
186     * Even when only the NSS database output format has been selected, OpenSSL is
187     still needed for verification and processing
188    
189    
190     ==============================================================================
191    
192     The change log below applies to the 1.x and 2.x series fetch-crl and is
193     included for historical purposes only. Fetch-crl3, with which this
194     changes file is being shipped, is a complete re-write of the utility.
195     Although a lot of backwards compatibility has been preserves, there have
196     been significant changes and the information below should NOT be used
197     to infer any behaviour of fetch-crl3.
198    
199     Fetch-crl 1.x and 2.x were released under the EU DataGrid License.
200    
201     Changes in version EGP 2.8.5
202     ----------------------------
203     (2010.06.03)
204    
205     * fetch-crl was occasionally leaving behind {hash}.r0.XXXXXX.r0 files
206     This has been fixed in this release (patch thanks to Jason Smith, BNL)
207     * man page was not compliant to Debian guidelines, this has been fixed
208     (patch thanks to Mattias Ellert, Uppsala University)
209    
210     Changes in version EGP 2.8.4
211     ----------------------------
212     (2010.04.04)
213    
214     * Fixes error when randomWait is not set [RH Bug 579488]
215    
216     Changes in version EGP 2.8.3
217     ----------------------------
218     (2010.03.28)
219    
220     * Preserve SELinux context for CRL files if SElinux status program exists
221     and selinux is enabled (RH bug 577403)
222     * Fix argument parsing on syslog facility specification (RH bug 577387)
223     * Increase granularity of the RandomWait and allow for 0 in -r option
224    
225     Changes in version EGP 2.8.2
226     ----------------------------
227     (2010.03.03)
228    
229     * Improved support for multiple CRL URLs by downloading until a success
230     is achieved, instead of downloading all of them
231     * Imported randomwait patch from Steve Traylen
232    
233     Changes in version EGP 2.8.1
234     ----------------------------
235     (2010.01.26)
236    
237     * The installed CRL file is re-checked for validity to catch file system
238     errors and local disk corruption. When possible, it will try to restore
239     a backup copy. Failures are not subject to aging tolerance.
240    
241     Changes in version EGP 2.8.0
242     ----------------------------
243     (2009.09.22)
244    
245     * The RPM packaging has been overhauled and is now sufficiently conformant
246     to EPEL and FedoraProject guidelines.
247     * New init scripts and a cron job entry have been added to allow management
248     of fetch-crl via the chkconfig mechanism
249    
250     These changes were contributed by Steve Traylen (CERN, Geneva, CH).
251    
252     Changes in version EGP 2.7.0
253     ----------------------------
254     (2009.01.25)
255    
256     * Warnings and errors are now counted. If there are errors in the download
257     or verification process for one or more CRLs, the exit status will be 1;
258     if there are errors in the local setup or in the script invocation, the
259     exit status will be 2.
260     * The installed CRLs no longer have the textual representation of the CRL,
261     but only the PEM data blob, thus reducing IO and memory requirements.
262     * the CRL aging threshold is now set by default to 24 hours. The previous
263     default was 0. The CRL aging threshold is set in the config file using
264     CRL_AGING_THRESHOLD=<xx>, or with the "-a" command-line argument.
265     * Default network timeouts reduced to 10 seconds (was 30) and retries to 2
266     * Added caching and conditional downloading. When CACHEDIR is set, the
267     original downloads are preserved and wget timestamping mode enabled.
268     When the content did not change, only the timestamp on the installed
269     CRL is updated. If SLOPPYCRLHASHES is set, the has is calculated based
270     on the name of the crl_url file, otherwise it is taken from the CRL itself.
271     - The CACHEDIR must be exclusively writable by the user running fetch-crl
272     - Setting CACHEDIR significantly reduced the bandwidth used by fetch-crl
273     * Added RESETPATHMODE setting in sysconfig. It defines whether or not to
274     set re-set $PATH to "/bin:/usr/bin" before start. The search for OpenSSL
275     may be done based on the old path.
276     yes=always replace; searchopenssl=search for openssl first and then reset;
277     no=keep original path, whatever that me be (may be empty if called from cron)
278     Default="yes". This replaces the hard-coded path in the tool!
279     * Hidden "FORCE_OVERWRITE" option now has a regular name. This is backwards-
280     compatible. Set FORCE_OVERWRITE=yes if you want files overwritten that
281     have a CRL-like name and ought to have CRL content, but currently do not.
282     * Addresses gLite Savannah bugs 28418 and 29559. Bug 27023 is partially
283     addressed. Bug 20062 can be remedied with WGET_OPTS arguments.
284     Addresses OSG ticket 4673.
285    
286     Changes in version EGP 2.6.6
287     ----------------------------
288     (2007.09.16)
289     (version 2.5.5 is invalid and was not publicly released)
290    
291     * Added obscure configuration parameter to allow overwriting of
292     arbitrary data files with a downloaded CRL (on request of
293     CERN, see https://savannah.cern.ch/bugs/index.php?29559)
294    
295     Changes in version EGP 2.6.4
296     ----------------------------
297     (2007.08.15)
298    
299     * Expired CA issuer certificate now gives a warning instead of an error
300     with the full verification result message
301     * additional logfile output target can be selected via the configuration file
302     * CRL aging threshold documented in manual page. Errors will now also be
303     generated in the CRL download failed consistently and the current CRL
304     has already expired
305    
306     Changes in version EGP 2.6.3
307     ----------------------------
308     (2006.11.13)
309    
310     * cron job example: fetch-crl invocation syntax error corrected
311    
312     Changes in version EGP 2.6.2
313     ----------------------------
314     (2006.10.27)
315    
316     * fixed bug: older wget versions do not recognise --no-check-certificate
317    
318     Changes in version EGP 2.6.1
319     ----------------------------
320     (2006.10.25)
321    
322     * fixed local timezone vs UTC error in LastUpdate CRL validation comparison
323     * fixed time comparison is the one-hour LastUpdate/download tolerance
324     (both fixes thanks to Alain Roy)
325     * added support for directory names containing whitespace
326     * added support for syslog reporting (via -f option or SYSLOGFACILITY directive)
327     * SERVERCERTCHECK=no is now the default. It can be reset via the configuration
328     file, or using the "--check-server-certificate" commandline option
329     * the main configuration file location (formerly fixed to be
330     /etc/sysconfig/fetch-crl) can now be set via the variable $FETCH_CRL_SYSCONFIG
331     * logfile format timestamp and tag have been normalised
332    
333     Changes in version EGP 2.6
334     --------------------------
335     (2006.05.20)
336    
337     * if the current local CRL has a lastUpdate time in the future, and the
338     newly downloaded CRL is older that the current one, allow the installation
339     of the newly downloaded CRL and issue a warning.
340     * added non-suppressable warning in case the newly downloaded CRL has a
341     lastUpdate time in the future, but install that CRL anyway (as the local
342     clock might have been wrong).
343    
344     Changes in version EGP 2.5
345     --------------------------
346     (2006.01.16)
347    
348     * added additional configuration arguments and configuration variables
349     to skip the server certificate check in wget
350     (to support https:// URLs where the server is authenticated with
351     a certificate that is not part of it's own trusted domain, such as
352     the KISTI URL)
353    
354     Changes in version EGP 2.4
355     --------------------------
356     (2005.11.15)
357    
358     * for those platforms that support the stat(1) command, and in case the
359     .crl_url file is named after the hash of the crl subject name to download,
360     error eporting for individual download errors can be suppressed for
361     a configurable amount of time as set via the "-a" option (unit: hours).
362    
363     Changes in version EGP 2.3
364     --------------------------
365     (2005.11.05)
366    
367     * do not replace recent CRLs with ones that have an older lastUpdate
368     timestamp (prevents ARP/DNS DoS attacks)
369    
370     Changes in version EGP 2.2
371     --------------------------
372     (2005.10.27)
373    
374     * secure http download by wget recognise the CAs in the trusted directory.
375     solves the issue described in the LCG bug tracking system
376     https://savannah.cern.ch/bugs/index.php?func=detailitem&item_id=12182
377    
378     Changes in version EGP 2.1
379     --------------------------
380     (2005.08.12)
381     * specifically look for the most recent version of OpenSSL. The
382     one in GLOBUS_LOCATION (which used to take precedence in the
383     previous releases) is outdated in many cases and caused
384     troubles on the LCG production systems in validating v2 CRLs
385     * added manual page fetch-crl(8)
386    
387     Changes in version EGP 2.0
388     --------------------------
389     (2005.02.28)
390     * name of the installed script changed to "fetch-crl"
391     * the cronjob script is no longer installed by default, but supplied
392     as an example in the %doc directory
393     * RPM is now relocatable (default install in /usr)
394     * READMA and CHANGES file now inclued in %doc tree
395     * make install now installs
396     * version increased to 2.0
397    
398     Changes in version EGP 1.9
399     --------------------------
400     (2005.02.24)
401     * the content of the final target CRL file is now checked for
402     containing a valid CRL if it already exists. If it does not
403     contain a CRL, an error is displayed and the file left untouched
404     So making the final ".r0" file in ${outdir} a link to something else
405     will not work, preventing an escalation in the final stage.
406    
407     Changes in version EGP 1.8
408     --------------------------
409     (changes from Fabio's version 1.7, 2005.02.24)
410    
411     * All temporary files (the initial CRL download using wget
412     and the PEM-converted version of that file) are now created using
413     mktemp
414     * the RetrieveFileByURL function will not overwrite files that
415     have any data in them
416     * Note that the script can be run by a non-priviledged user, but
417     that the output directory must be made writable by that user
418     in an out-of-band way.
419    
420     EDG version 1.7
421     ---------------
422     Imported with consent of Fabio Hernandez and Steve Traylen from
423     the original EDG repository.
424     The EU DataGrid License applies, see http://www.eu-datagrid.org/

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