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