1 User-Visible krb5-strength Changes
3 krb5-strength 2.2 (unreleased)
5 More complex character class requirements can be specified with the
6 configuration option require_classes. This option lists the character
7 classes the password must contain. These restrictions may be
8 qualified with password length ranges, allowing the requirements to
9 change with the length of the password. See README for more details
10 and the option syntax.
12 cdbmake-wordlist now supports filtering out words based on maximum
13 length (-L) and arbitrary user-provided regular expressions (-x). It
14 also supports running in filter mode to produce a new wordlist instead
17 krb5-strength 2.1 (2013-10-10)
19 Fix the package build when CDB support is disabled or TinyCDB was not
22 Some of the password rejection error messages have been changed to
23 make them more accurate or comprehensible to the user.
25 Passing --with-tinycdb to configure now correctly makes TinyCDB
26 support mandatory without adding bogus directories to the library and
29 krb5-strength 2.0 (2013-10-07)
31 Add support for the MIT Kerberos password quality plugin interface,
32 available in MIT Kerberos 1.9 and later, contributed by Greg Hudson
33 and MIT. Drop the patch for MIT Kerberos 1.4 (and hence support for
34 versions of MIT Kerberos prior to 1.9). A dictionary path set in
35 krb5.conf takes precedence over the dictionary path provided by MIT
36 Kerberos when the plugin is initialized, if both are set, to allow the
37 dict_path configuration setting to be used for other plugins while
38 using a separate dictionary for krb5-strength.
40 The default installation path for this plugin is now
41 /usr/local/lib/krb5/plugins/pwqual/strength.so (for both MIT and
42 Heimdal), assuming a --libdir setting of /usr/local/lib. This may
43 require updates to the Kerberos KDC configuration or moving the plugin
44 when upgrading from earlier versions.
46 Add support for building with TinyCDB and then checking passwords
47 against a CDB database. There is a new password_dictionary_cdb
48 krb5.conf configuration setting that configures a CDB directory to
49 use. The tests with a CDB dictionary are much simpler: passwords are
50 rejected if found in the dictionary either literally, with one or two
51 characters removed from the start or end, or with one character
52 removed from both the start and the end. Both a CrackLib and a CDB
53 dictionary can be specified to check both dictionaries. A new
54 cdbmake-wordlist utility (written in Perl) is included to ease the
55 process of creating a CDB database from a simple word list.
57 A minimum password length can now be enforced directly via the plugin
58 or external check program without relying on CrackLib. To set a
59 minimum password length, add a minimum_length setting to the
60 krb5-strength section of [appdefaults] in krb5.conf.
62 New boolean settings require_ascii_printable and require_non_letter
63 are supported in the krb5-strength setting of [appdefaults] in
64 krb5.conf. The former rejects passwords containing characters other
65 than printable ASCII characters (including space), and the latter
66 requires that passwords contain at least one character that is not a
67 letter (upper or lower case) or a space.
69 The plugin can now be configured without a dictionary, in which case
70 only checks for a password based on the principal and the simpler
71 checks available through the new configuration variables are done.
72 This mode is mostly useful for testing, since such simple checking can
73 more easily be done via less complex password strength configurations.
75 The check for passwords based on the principal now check for passwords
76 formed by reversing or adding numbers before and after each separate
77 component of the principal. This will catch passwords based on the
78 realm or components of the realm, which will often catch passwords
79 based on the name of the local institution.
81 The plugin now sets the Kerberos error message in the context to pass
82 error information, resulting in higher-quality error reporting in the
85 CrackLib checks for passwords where a character is a simple increment
86 or decrement of the previous character. In previous versions, the
87 embedded version of CrackLib allowed at most four such occurrences in
88 the entire password. This results in false positives on long
89 passphrases, since such accidental letter relationships aren't
90 uncommon in human languages. Change the embedded CrackLib to allow
91 one such simple increment for every three characters in the password,
92 which tightens the check somewhat for shorter passwords and loosens it
93 considerably for longer passwords.
95 Expect the Heimdal password strength checking plugin header in
96 kadm5/kadm5-pwcheck.h instead of outside of the kadm5 directory. This
97 is the path used by current versions of Heimdal. Drop support for
98 older versions of Heimdal that don't install this header file.
100 Update to rra-c-util 4.9:
102 * Probe for Kerberos headers using file checks instead of compiles.
103 * Improve probe for the Heimdal libroken library.
104 * Always build with large file support.
105 * Conditionally call AM_PROG_AR for portability to new Autotools.
107 Update to C TAP Harness 2.2:
109 * Allow more easily running single programs under tests/runtests.
110 * Flush the output from the test harness after each test.
112 krb5-strength 1.1 (2012-05-11)
114 Change the minimum password length in the embedded CrackLib to 8.
116 Reject passwords formed from the username portion of the principal
117 with digits appended.
119 In the embedded CrackLib, also check for a duplicated dictionary word.
121 Support linking with the system CrackLib instead of the embedded and
122 stricter copy by passing --with-cracklib to configure.
124 Fix variable sizes in the embedded CrackLib on 64-bit platforms. This
125 may fix interoperability problems with databases created on platforms
126 with a different native integer size. Thanks, Karl Lehnberger and
129 Stop using local in the test suite for portability to Solaris /bin/sh.
131 Update to rra-c-util 4.4:
133 * Use PATH_KRB5_CONFIG to override krb5-config location.
134 * Fix probing for ibm_svc/krb5_svc.h on AIX.
135 * Support Heimdal libraries without libroken, like OpenBSD.
136 * Fix manual Kerberos library probing without transitive dependencies.
137 * Support systems that only have krb5/krb5.h.
138 * Pass --deps to krb5-config in the non-reduced-dependencies case.
139 * Silence __attribute__ warnings on more compilers.
140 * Update warning flags for make warnings.
141 * Flesh out MAINTCLEANFILES to remove autogen results.
142 * Add notices to all files copied from rra-c-util.
144 Update to C TAP Harness 1.12:
146 * Drop is_double from the C TAP library to avoid requiring -lm.
147 * Avoid using local in the shell libtap.sh library.
148 * Silence __attribute__ warnings on more compilers.
149 * runtests now frees all allocated resources on exit.
150 * Fix runtests to still honor SOURCE and -s without BUILD and -b.
151 * Add tests/HOWTO documenting how to add new tests.
152 * Ensure correct output ordering in test results.
153 * Add -h and a better usage message to tests/runtests.
155 krb5-strength 1.0 (2010-02-16)
157 Add heimdal-strength, a program that checks password strength using
158 the protocol for a Heimdal external check program.
160 The shared module now also exports the interface expected by Heimdal's
161 dynamically loaded password strength checking API and can be used as a
162 Heimdal kadmin plugin.
164 Add a new plugin API for MIT Kerberos modelled after the plugin API
165 used for other MIT Kerberos plugins. Thanks to Marcus Watts for
166 substantial research and contributions to the interface design. This
167 work is incomplete in this release, missing the corresponding patch to
170 Fixed the data format written by the included packer program to add
171 enough nul bytes at the end of the data. Previously, there was not
172 enough trailing nul bytes for the expected input format, leading to
173 uninitialized memory reads in the password lookup.
175 Add a test suite using the driver and library from C TAP Harness 1.1.
177 Add portability code for platforms without a working snprintf or other
178 deficiencies and updated the code to take advantage of those
181 krb5-strength 0.5 (2007-07-18)
183 The check of the password against the principal checked against the
184 fully-qualified principal, which is not the usual problem.
185 Additionally check that the password doesn't match the principal with
186 the realm removed or the reverse of that (case-insensitive).
188 krb5-strength 0.4 (2007-03-28)
190 The patches directory was omitted from the distribution. Really
193 krb5-strength 0.3 (2007-03-23)
195 Initial public release. Includes a patch for MIT Kerberos, a slightly
196 modified version of CrackLib, and glue wrapped around CrackLib to make