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