1 User-Visible krb5-strength Changes
3 krb5-strength 3.3 (unreleased)
5 heimdal-history now requires the Perl modules Const::Fast and
6 JSON::MaybeXS instead of Readonly and JSON.
8 Explicitly erase the copy of the password made in the Heimdal plugin.
10 Update to rra-c-util 10.5:
12 * Assume a working snprintf rather than supplying a replacement.
13 * Fix detection of reallocarray on NetBSD.
14 * Check that Kerberos header files were found during configure.
15 * Use AS_ECHO in all Autoconf macros.
16 * Always use lib32 or lib64 if it exists, even on Debian.
17 * Fix rejection of unknown Clang warning flags.
18 * Disable -Wreserved-identifier for Clang warning builds.
20 krb5-strength 3.2 (2020-05-17)
22 Add new -c (--check-only) option to heimdal-history to check whether a
23 password would be accepted without updating the history or password
24 length databases. Based on work by macrotex.
26 Increase hash iterations for heimdal-history by roughly a factor of
27 four to increase the time required for a password hash to about 0.1
28 seconds on modern hardware. This will affect newly-stored history
29 entries but will not invalidate existing password history entries.
31 Support building without CrackLib support by passing
32 --without-cracklib to configure. This makes the code a bit simpler
33 and lighter if you don't intend to ever use the CrackLib support.
35 krb5-strength-wordlist now requires Perl 5.010 or later.
37 Use explicit_bzero instead of memset, where available, to overwrite
38 copies of passwords before freeing memory. This reduces the lifetime
39 of passwords in memory.
41 Skip tests that require the stronger rule configuration in the
42 embedded CrackLib when built against system CrackLib. This avoids
43 test failures when built with system CrackLib.
45 Rework the check-valgrind target to use the new C TAP Harness valgrind
46 support and automatically check the valgrind log files for errors at
47 the end of the test suite.
49 Add SPDX-License-Identifier headers to all substantial source files
50 other than those in the bundled version of CrackLib.
52 Update to rra-c-util 8.2:
54 * Implement explicit_bzero with memset if it is not available.
55 * Reformat all C source using clang-format 10.
56 * Work around Test::Strict not skipping .git directories.
57 * Fix warnings with perltidy 20190601 and Perl::Critic 1.134.
58 * Improve check for obsolete strings.
59 * Use a more standard all-permissive license.
60 * Add SPDX-License-Identifier headers to all substantial source files.
61 * Skip more build system files when running the test suite.
62 * Fix warnings with Clang 10, GCC 10, and the Clang static analyzer.
63 * Exclude more valgrind false positives with Kerberos libraries.
64 * Improve support for AIX's bundled Kerberos.
66 Update to C TAP Harness 4.7:
68 * Fix warnings with GCC 10.
69 * Reformat all C source using clang-format 10.
70 * Fixed malloc error checking in bstrndup.
71 * Add support for valgrind testing via test list options.
72 * Report test failures as left and right, not wanted and seen.
73 * Fix is_string comparisons involving NULL pointers and "(null)".
74 * Add SPDX-License-Identifier headers to all substantial source files.
76 krb5-strength 3.1 (2016-12-25)
78 A new configuration option, cracklib_maxlen, can be set to skip
79 CrackLib checks of passwords longer than that length. The CrackLib
80 rules were designed in a world in which most passwords were four to
81 eight characters long and tend to spuriously reject longer passwords.
82 SQLite dictionaries work better for checking longer passwords and
83 passphrases. Patch from Jorj Bauer.
85 The require_classes configuration option can now require a particular
86 number of character classes in the password (whatever those classes
87 are). Patch from Toby Blake.
89 Change the error messages returned for passwords that fail strength
90 checking to start with a capital letter. This appears to be more
91 consistent with the error message conventions used inside Heimdal.
93 Change the DB_File::Lock calling method in heimdal-history to work
94 properly with the (buggy) CPAN version of DB_File::Lock, instead of
95 relying on Debian's patched version. Thanks to Bernt Jernberg for the
98 Apply the SuSE patch for a buffer overflow when using duplicate rules
99 to the embedded CrackLib. No duplicating rules are used in the rule
100 set included with this package, and this package doesn't expose the
101 general API, so this was not exploitable, but best to close the latent
102 issue. (The other recent CrackLib vulnerability, CVE-2016-6318,
103 doesn't apply since all the GECOS manipulation code was removed from
104 the embedded CrackLib in this package.)
106 Patch the mkdict and packer in the embedded copy of CrackLib to force
107 C locale when sorting (avoiding a corrupted dictionary) and warn and
108 skip out-of-order words rather than creating a corrupted dictionary.
109 Patch from Mark Sirota.
111 Configuration instrutions are now in the heimdal-history and
112 heimdal-strength man pages and a new krb5-strength man page (which
113 documents configuration of the KDC plugin) instead of the README file
114 to make it more accessible after the software has been installed.
116 Update to rra-c-util 6.2:
118 * Use calloc in preference to malloc wherever appropriate.
119 * Use reallocarray in preference to realloc wherever appropriate.
120 * Suppress warnings from Kerberos headers under make warnings.
121 * Support the embedded Kerberos in Solaris 10 in library probes.
122 * Add missing va_end in xasprintf implementation.
123 * Fix logic in Test::RRA::Automake for new Automake dist checking.
124 * Fix all return-value checks for snprintf to avoid off-by-one error.
125 * Update warning flags for make warnings to GCC 6.1.0.
126 * Fix Test::RRA::Config for new "do" semantics in Perl 5.22.2.
127 * Add a new test for obsolete eyrie.org URLs.
128 * Require Test::Strict 0.25 or newer for Perl strictness checks.
130 Update to C TAP Harness 4.1:
132 * Replace all remaining uses of sprintf.
133 * Test lists may now have comments and blank lines.
134 * runtests -v will show the complete output from a test.
135 * Fix segfault in runtests when given an empty test list.
136 * Tests use C_TAP_SOURCE and C_TAP_BUILD instead of SOURCE and BUILD.
138 krb5-strength 3.0 (2014-03-25)
140 The krb5-strength plugin and heimdal-strength program now support a
141 SQLite password dictionary. This format of dictionary can detect any
142 password within edit distance one of a dictionary word, meaning that
143 the dictionary word can be formed by adding, removing, or changing a
144 single character in the password. A SQLite password dictionary can be
145 used alone or in combination with any of the other supported
146 dictionary types. SQLite dictionary support is based on work by David
149 cdbmake-wordlist has been renamed to krb5-strength-wordlist.
150 Generating CDB dictionaries now requires the -c option; see the
151 documentation for more information. A SQLite database of dictionary
152 words can now be created instead, using the -s option.
154 A password history implementation for Heimdal is now included. This
155 is a separate Perl program, heimdal-history, that stacks with the
156 external program implementation of strength checking. It is not
157 available in the form of a plugin, only as a Heimdal external password
158 quality check. (MIT Kerberos provides its own password history
159 mechanism.) This program has more extensive Perl module dependencies
160 than the other programs in this distribution.
162 A new configuration option, minimum_different, can be set to require
163 that passwords contain at least that many unique characters. This can
164 be used to reject long strings of identical characters or short
165 patterns, which may pass other checks but still be too easy to guess.
167 Update to rra-c-util 5.4:
169 * Fix portable/krb5.h build with a C++ compiler.
170 * Use Lancaster Consensus environment variables to control tests.
171 * Work around perltidy bug that leaves behind stray log files.
173 Update to C TAP Harness 3.0:
175 * Reopen standard input to /dev/null when running a test list.
176 * Don't leak extraneous file descriptors to tests.
178 krb5-strength 2.2 (2013-12-16)
180 More complex character class requirements can be specified with the
181 configuration option require_classes. This option lists the character
182 classes the password must contain. These restrictions may be
183 qualified with password length ranges, allowing the requirements to
184 change with the length of the password. See README for more details
185 and the option syntax.
187 cdbmake-wordlist now supports filtering out words based on maximum
188 length (-L) and arbitrary user-provided regular expressions (-x). It
189 also supports running in filter mode to produce a new wordlist instead
192 Close a file descriptor and memory leak in the included version of
193 CrackLib. This problem was already fixed in CrackLib 2.9.0.
195 Update to rra-c-util 4.12:
197 * Properly check the return status of snprintf and friends.
199 Update to C TAP Harness 2.3:
201 * Suppress lazy plans and test summaries if the test failed with bail.
202 * Add warn_unused_result gcc attributes to relevant functions.
204 krb5-strength 2.1 (2013-10-10)
206 Fix the package build when CDB support is disabled or TinyCDB was not
209 Some of the password rejection error messages have been changed to
210 make them more accurate or comprehensible to the user.
212 Passing --with-tinycdb to configure now correctly makes TinyCDB
213 support mandatory without adding bogus directories to the library and
214 include search paths.
216 krb5-strength 2.0 (2013-10-07)
218 Add support for the MIT Kerberos password quality plugin interface,
219 available in MIT Kerberos 1.9 and later, contributed by Greg Hudson
220 and MIT. Drop the patch for MIT Kerberos 1.4 (and hence support for
221 versions of MIT Kerberos prior to 1.9). A dictionary path set in
222 krb5.conf takes precedence over the dictionary path provided by MIT
223 Kerberos when the plugin is initialized, if both are set, to allow the
224 dict_path configuration setting to be used for other plugins while
225 using a separate dictionary for krb5-strength.
227 The default installation path for this plugin is now
228 /usr/local/lib/krb5/plugins/pwqual/strength.so (for both MIT and
229 Heimdal), assuming a --libdir setting of /usr/local/lib. This may
230 require updates to the Kerberos KDC configuration or moving the plugin
231 when upgrading from earlier versions.
233 Add support for building with TinyCDB and then checking passwords
234 against a CDB database. There is a new password_dictionary_cdb
235 krb5.conf configuration setting that configures a CDB directory to
236 use. The tests with a CDB dictionary are much simpler: passwords are
237 rejected if found in the dictionary either literally, with one or two
238 characters removed from the start or end, or with one character
239 removed from both the start and the end. Both a CrackLib and a CDB
240 dictionary can be specified to check both dictionaries. A new
241 cdbmake-wordlist utility (written in Perl) is included to ease the
242 process of creating a CDB database from a simple word list.
244 A minimum password length can now be enforced directly via the plugin
245 or external check program without relying on CrackLib. To set a
246 minimum password length, add a minimum_length setting to the
247 krb5-strength section of [appdefaults] in krb5.conf.
249 New boolean settings require_ascii_printable and require_non_letter
250 are supported in the krb5-strength setting of [appdefaults] in
251 krb5.conf. The former rejects passwords containing characters other
252 than printable ASCII characters (including space), and the latter
253 requires that passwords contain at least one character that is not a
254 letter (upper or lower case) or a space.
256 The plugin can now be configured without a dictionary, in which case
257 only checks for a password based on the principal and the simpler
258 checks available through the new configuration variables are done.
259 This mode is mostly useful for testing, since such simple checking can
260 more easily be done via less complex password strength configurations.
262 The check for passwords based on the principal now check for passwords
263 formed by reversing or adding numbers before and after each separate
264 component of the principal. This will catch passwords based on the
265 realm or components of the realm, which will often catch passwords
266 based on the name of the local institution.
268 The plugin now sets the Kerberos error message in the context to pass
269 error information, resulting in higher-quality error reporting in the
272 CrackLib checks for passwords where a character is a simple increment
273 or decrement of the previous character. In previous versions, the
274 embedded version of CrackLib allowed at most four such occurrences in
275 the entire password. This results in false positives on long
276 passphrases, since such accidental letter relationships aren't
277 uncommon in human languages. Change the embedded CrackLib to allow
278 one such simple increment for every three characters in the password,
279 which tightens the check somewhat for shorter passwords and loosens it
280 considerably for longer passwords.
282 Expect the Heimdal password strength checking plugin header in
283 kadm5/kadm5-pwcheck.h instead of outside of the kadm5 directory. This
284 is the path used by current versions of Heimdal. Drop support for
285 older versions of Heimdal that don't install this header file.
287 Update to rra-c-util 4.9:
289 * Probe for Kerberos headers using file checks instead of compiles.
290 * Improve probe for the Heimdal libroken library.
291 * Always build with large file support.
292 * Conditionally call AM_PROG_AR for portability to new Autotools.
294 Update to C TAP Harness 2.2:
296 * Allow more easily running single programs under tests/runtests.
297 * Flush the output from the test harness after each test.
299 krb5-strength 1.1 (2012-05-11)
301 Change the minimum password length in the embedded CrackLib to 8.
303 Reject passwords formed from the username portion of the principal
304 with digits appended.
306 In the embedded CrackLib, also check for a duplicated dictionary word.
308 Support linking with the system CrackLib instead of the embedded and
309 stricter copy by passing --with-cracklib to configure.
311 Fix variable sizes in the embedded CrackLib on 64-bit platforms. This
312 may fix interoperability problems with databases created on platforms
313 with a different native integer size. Thanks, Karl Lehnberger and
316 Stop using local in the test suite for portability to Solaris /bin/sh.
318 Update to rra-c-util 4.4:
320 * Use PATH_KRB5_CONFIG to override krb5-config location.
321 * Fix probing for ibm_svc/krb5_svc.h on AIX.
322 * Support Heimdal libraries without libroken, like OpenBSD.
323 * Fix manual Kerberos library probing without transitive dependencies.
324 * Support systems that only have krb5/krb5.h.
325 * Pass --deps to krb5-config in the non-reduced-dependencies case.
326 * Silence __attribute__ warnings on more compilers.
327 * Update warning flags for make warnings.
328 * Flesh out MAINTCLEANFILES to remove autogen results.
329 * Add notices to all files copied from rra-c-util.
331 Update to C TAP Harness 1.12:
333 * Drop is_double from the C TAP library to avoid requiring -lm.
334 * Avoid using local in the shell libtap.sh library.
335 * Silence __attribute__ warnings on more compilers.
336 * runtests now frees all allocated resources on exit.
337 * Fix runtests to still honor SOURCE and -s without BUILD and -b.
338 * Add tests/HOWTO documenting how to add new tests.
339 * Ensure correct output ordering in test results.
340 * Add -h and a better usage message to tests/runtests.
342 krb5-strength 1.0 (2010-02-16)
344 Add heimdal-strength, a program that checks password strength using
345 the protocol for a Heimdal external check program.
347 The shared module now also exports the interface expected by Heimdal's
348 dynamically loaded password strength checking API and can be used as a
349 Heimdal kadmin plugin.
351 Add a new plugin API for MIT Kerberos modelled after the plugin API
352 used for other MIT Kerberos plugins. Thanks to Marcus Watts for
353 substantial research and contributions to the interface design. This
354 work is incomplete in this release, missing the corresponding patch to
357 Fixed the data format written by the included packer program to add
358 enough nul bytes at the end of the data. Previously, there was not
359 enough trailing nul bytes for the expected input format, leading to
360 uninitialized memory reads in the password lookup.
362 Add a test suite using the driver and library from C TAP Harness 1.1.
364 Add portability code for platforms without a working snprintf or other
365 deficiencies and updated the code to take advantage of those
368 krb5-strength 0.5 (2007-07-18)
370 The check of the password against the principal checked against the
371 fully-qualified principal, which is not the usual problem.
372 Additionally check that the password doesn't match the principal with
373 the realm removed or the reverse of that (case-insensitive).
375 krb5-strength 0.4 (2007-03-28)
377 The patches directory was omitted from the distribution. Really
380 krb5-strength 0.3 (2007-03-23)
382 Initial public release. Includes a patch for MIT Kerberos, a slightly
383 modified version of CrackLib, and glue wrapped around CrackLib to make