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