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Revision 1922 - (hide annotations) (download)
Sun Sep 19 13:21:05 2010 UTC (11 years, 1 month ago) by davidg
Original Path: trunk/fetchcrl/CHANGES
File size: 14523 byte(s)
Revoed Sanavvah bug 72495 from MattiasE


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

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