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