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