1 User-Visible krb5-strength Changes
3 krb5-strength 2.2 (2013-12-16)
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 Close a file descriptor and memory leak in the included version of
18 CrackLib. This problem was already fixed in CrackLib 2.9.0.
20 Update to rra-c-util 4.12:
22 * Properly check the return status of snprintf and friends.
24 Update to C TAP Harness 2.3:
26 * Suppress lazy plans and test summaries if the test failed with bail.
27 * Add warn_unused_result gcc attributes to relevant functions.
29 krb5-strength 2.1 (2013-10-10)
31 Fix the package build when CDB support is disabled or TinyCDB was not
34 Some of the password rejection error messages have been changed to
35 make them more accurate or comprehensible to the user.
37 Passing --with-tinycdb to configure now correctly makes TinyCDB
38 support mandatory without adding bogus directories to the library and
41 krb5-strength 2.0 (2013-10-07)
43 Add support for the MIT Kerberos password quality plugin interface,
44 available in MIT Kerberos 1.9 and later, contributed by Greg Hudson
45 and MIT. Drop the patch for MIT Kerberos 1.4 (and hence support for
46 versions of MIT Kerberos prior to 1.9). A dictionary path set in
47 krb5.conf takes precedence over the dictionary path provided by MIT
48 Kerberos when the plugin is initialized, if both are set, to allow the
49 dict_path configuration setting to be used for other plugins while
50 using a separate dictionary for krb5-strength.
52 The default installation path for this plugin is now
53 /usr/local/lib/krb5/plugins/pwqual/strength.so (for both MIT and
54 Heimdal), assuming a --libdir setting of /usr/local/lib. This may
55 require updates to the Kerberos KDC configuration or moving the plugin
56 when upgrading from earlier versions.
58 Add support for building with TinyCDB and then checking passwords
59 against a CDB database. There is a new password_dictionary_cdb
60 krb5.conf configuration setting that configures a CDB directory to
61 use. The tests with a CDB dictionary are much simpler: passwords are
62 rejected if found in the dictionary either literally, with one or two
63 characters removed from the start or end, or with one character
64 removed from both the start and the end. Both a CrackLib and a CDB
65 dictionary can be specified to check both dictionaries. A new
66 cdbmake-wordlist utility (written in Perl) is included to ease the
67 process of creating a CDB database from a simple word list.
69 A minimum password length can now be enforced directly via the plugin
70 or external check program without relying on CrackLib. To set a
71 minimum password length, add a minimum_length setting to the
72 krb5-strength section of [appdefaults] in krb5.conf.
74 New boolean settings require_ascii_printable and require_non_letter
75 are supported in the krb5-strength setting of [appdefaults] in
76 krb5.conf. The former rejects passwords containing characters other
77 than printable ASCII characters (including space), and the latter
78 requires that passwords contain at least one character that is not a
79 letter (upper or lower case) or a space.
81 The plugin can now be configured without a dictionary, in which case
82 only checks for a password based on the principal and the simpler
83 checks available through the new configuration variables are done.
84 This mode is mostly useful for testing, since such simple checking can
85 more easily be done via less complex password strength configurations.
87 The check for passwords based on the principal now check for passwords
88 formed by reversing or adding numbers before and after each separate
89 component of the principal. This will catch passwords based on the
90 realm or components of the realm, which will often catch passwords
91 based on the name of the local institution.
93 The plugin now sets the Kerberos error message in the context to pass
94 error information, resulting in higher-quality error reporting in the
97 CrackLib checks for passwords where a character is a simple increment
98 or decrement of the previous character. In previous versions, the
99 embedded version of CrackLib allowed at most four such occurrences in
100 the entire password. This results in false positives on long
101 passphrases, since such accidental letter relationships aren't
102 uncommon in human languages. Change the embedded CrackLib to allow
103 one such simple increment for every three characters in the password,
104 which tightens the check somewhat for shorter passwords and loosens it
105 considerably for longer passwords.
107 Expect the Heimdal password strength checking plugin header in
108 kadm5/kadm5-pwcheck.h instead of outside of the kadm5 directory. This
109 is the path used by current versions of Heimdal. Drop support for
110 older versions of Heimdal that don't install this header file.
112 Update to rra-c-util 4.9:
114 * Probe for Kerberos headers using file checks instead of compiles.
115 * Improve probe for the Heimdal libroken library.
116 * Always build with large file support.
117 * Conditionally call AM_PROG_AR for portability to new Autotools.
119 Update to C TAP Harness 2.2:
121 * Allow more easily running single programs under tests/runtests.
122 * Flush the output from the test harness after each test.
124 krb5-strength 1.1 (2012-05-11)
126 Change the minimum password length in the embedded CrackLib to 8.
128 Reject passwords formed from the username portion of the principal
129 with digits appended.
131 In the embedded CrackLib, also check for a duplicated dictionary word.
133 Support linking with the system CrackLib instead of the embedded and
134 stricter copy by passing --with-cracklib to configure.
136 Fix variable sizes in the embedded CrackLib on 64-bit platforms. This
137 may fix interoperability problems with databases created on platforms
138 with a different native integer size. Thanks, Karl Lehnberger and
141 Stop using local in the test suite for portability to Solaris /bin/sh.
143 Update to rra-c-util 4.4:
145 * Use PATH_KRB5_CONFIG to override krb5-config location.
146 * Fix probing for ibm_svc/krb5_svc.h on AIX.
147 * Support Heimdal libraries without libroken, like OpenBSD.
148 * Fix manual Kerberos library probing without transitive dependencies.
149 * Support systems that only have krb5/krb5.h.
150 * Pass --deps to krb5-config in the non-reduced-dependencies case.
151 * Silence __attribute__ warnings on more compilers.
152 * Update warning flags for make warnings.
153 * Flesh out MAINTCLEANFILES to remove autogen results.
154 * Add notices to all files copied from rra-c-util.
156 Update to C TAP Harness 1.12:
158 * Drop is_double from the C TAP library to avoid requiring -lm.
159 * Avoid using local in the shell libtap.sh library.
160 * Silence __attribute__ warnings on more compilers.
161 * runtests now frees all allocated resources on exit.
162 * Fix runtests to still honor SOURCE and -s without BUILD and -b.
163 * Add tests/HOWTO documenting how to add new tests.
164 * Ensure correct output ordering in test results.
165 * Add -h and a better usage message to tests/runtests.
167 krb5-strength 1.0 (2010-02-16)
169 Add heimdal-strength, a program that checks password strength using
170 the protocol for a Heimdal external check program.
172 The shared module now also exports the interface expected by Heimdal's
173 dynamically loaded password strength checking API and can be used as a
174 Heimdal kadmin plugin.
176 Add a new plugin API for MIT Kerberos modelled after the plugin API
177 used for other MIT Kerberos plugins. Thanks to Marcus Watts for
178 substantial research and contributions to the interface design. This
179 work is incomplete in this release, missing the corresponding patch to
182 Fixed the data format written by the included packer program to add
183 enough nul bytes at the end of the data. Previously, there was not
184 enough trailing nul bytes for the expected input format, leading to
185 uninitialized memory reads in the password lookup.
187 Add a test suite using the driver and library from C TAP Harness 1.1.
189 Add portability code for platforms without a working snprintf or other
190 deficiencies and updated the code to take advantage of those
193 krb5-strength 0.5 (2007-07-18)
195 The check of the password against the principal checked against the
196 fully-qualified principal, which is not the usual problem.
197 Additionally check that the password doesn't match the principal with
198 the realm removed or the reverse of that (case-insensitive).
200 krb5-strength 0.4 (2007-03-28)
202 The patches directory was omitted from the distribution. Really
205 krb5-strength 0.3 (2007-03-23)
207 Initial public release. Includes a patch for MIT Kerberos, a slightly
208 modified version of CrackLib, and glue wrapped around CrackLib to make