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