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Revision 2804 - (show annotations) (download)
Tue Nov 10 15:48:48 2015 UTC (6 years, 1 month ago) by davidg
File size: 18276 byte(s)
Add documentation for $cnf->{_}->{cache_control_request}

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

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