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