User-Visible krb5-strength Changes
-krb5-strength 1.0 (unreleased)
+krb5-strength 3.0 (2014-03-25)
+
+ The krb5-strength plugin and heimdal-strength program now support a
+ SQLite password dictionary. This format of dictionary can detect any
+ password within edit distance one of a dictionary word, meaning that
+ the dictionary word can be formed by adding, removing, or changing a
+ single character in the password. A SQLite password dictionary can be
+ used alone or in combination with any of the other supported
+ dictionary types. SQLite dictionary support is based on work by David
+ Mazières.
+
+ cdbmake-wordlist has been renamed to krb5-strength-wordlist.
+ Generating CDB dictionaries now requires the -c option; see the
+ documentation for more information. A SQLite database of dictionary
+ words can now be created instead, using the -s option.
+
+ A password history implementation for Heimdal is now included. This
+ is a separate Perl program, heimdal-history, that stacks with the
+ external program implementation of strength checking. It is not
+ available in the form of a plugin, only as a Heimdal external password
+ quality check. (MIT Kerberos provides its own password history
+ mechanism.) This program has more extensive Perl module dependencies
+ than the other programs in this distribution.
+
+ A new configuration option, minimum_different, can be set to require
+ that passwords contain at least that many unique characters. This can
+ be used to reject long strings of identical characters or short
+ patterns, which may pass other checks but still be too easy to guess.
+
+ Update to rra-c-util 5.4:
+
+ * Fix portable/krb5.h build with a C++ compiler.
+ * Use Lancaster Consensus environment variables to control tests.
+ * Work around perltidy bug that leaves behind stray log files.
+
+ Update to C TAP Harness 3.0:
+
+ * Reopen standard input to /dev/null when running a test list.
+ * Don't leak extraneous file descriptors to tests.
+
+krb5-strength 2.2 (2013-12-16)
+
+ More complex character class requirements can be specified with the
+ configuration option require_classes. This option lists the character
+ classes the password must contain. These restrictions may be
+ qualified with password length ranges, allowing the requirements to
+ change with the length of the password. See README for more details
+ and the option syntax.
+
+ cdbmake-wordlist now supports filtering out words based on maximum
+ length (-L) and arbitrary user-provided regular expressions (-x). It
+ also supports running in filter mode to produce a new wordlist instead
+ of a CDB file (-o).
+
+ Close a file descriptor and memory leak in the included version of
+ CrackLib. This problem was already fixed in CrackLib 2.9.0.
+
+ Update to rra-c-util 4.12:
+
+ * Properly check the return status of snprintf and friends.
+
+ Update to C TAP Harness 2.3:
+
+ * Suppress lazy plans and test summaries if the test failed with bail.
+ * Add warn_unused_result gcc attributes to relevant functions.
+
+krb5-strength 2.1 (2013-10-10)
+
+ Fix the package build when CDB support is disabled or TinyCDB was not
+ found.
+
+ Some of the password rejection error messages have been changed to
+ make them more accurate or comprehensible to the user.
+
+ Passing --with-tinycdb to configure now correctly makes TinyCDB
+ support mandatory without adding bogus directories to the library and
+ include search paths.
+
+krb5-strength 2.0 (2013-10-07)
+
+ Add support for the MIT Kerberos password quality plugin interface,
+ available in MIT Kerberos 1.9 and later, contributed by Greg Hudson
+ and MIT. Drop the patch for MIT Kerberos 1.4 (and hence support for
+ versions of MIT Kerberos prior to 1.9). A dictionary path set in
+ krb5.conf takes precedence over the dictionary path provided by MIT
+ Kerberos when the plugin is initialized, if both are set, to allow the
+ dict_path configuration setting to be used for other plugins while
+ using a separate dictionary for krb5-strength.
+
+ The default installation path for this plugin is now
+ /usr/local/lib/krb5/plugins/pwqual/strength.so (for both MIT and
+ Heimdal), assuming a --libdir setting of /usr/local/lib. This may
+ require updates to the Kerberos KDC configuration or moving the plugin
+ when upgrading from earlier versions.
+
+ Add support for building with TinyCDB and then checking passwords
+ against a CDB database. There is a new password_dictionary_cdb
+ krb5.conf configuration setting that configures a CDB directory to
+ use. The tests with a CDB dictionary are much simpler: passwords are
+ rejected if found in the dictionary either literally, with one or two
+ characters removed from the start or end, or with one character
+ removed from both the start and the end. Both a CrackLib and a CDB
+ dictionary can be specified to check both dictionaries. A new
+ cdbmake-wordlist utility (written in Perl) is included to ease the
+ process of creating a CDB database from a simple word list.
+
+ A minimum password length can now be enforced directly via the plugin
+ or external check program without relying on CrackLib. To set a
+ minimum password length, add a minimum_length setting to the
+ krb5-strength section of [appdefaults] in krb5.conf.
+
+ New boolean settings require_ascii_printable and require_non_letter
+ are supported in the krb5-strength setting of [appdefaults] in
+ krb5.conf. The former rejects passwords containing characters other
+ than printable ASCII characters (including space), and the latter
+ requires that passwords contain at least one character that is not a
+ letter (upper or lower case) or a space.
+
+ The plugin can now be configured without a dictionary, in which case
+ only checks for a password based on the principal and the simpler
+ checks available through the new configuration variables are done.
+ This mode is mostly useful for testing, since such simple checking can
+ more easily be done via less complex password strength configurations.
+
+ The check for passwords based on the principal now check for passwords
+ formed by reversing or adding numbers before and after each separate
+ component of the principal. This will catch passwords based on the
+ realm or components of the realm, which will often catch passwords
+ based on the name of the local institution.
+
+ The plugin now sets the Kerberos error message in the context to pass
+ error information, resulting in higher-quality error reporting in the
+ MIT Kerberos plugin.
+
+ CrackLib checks for passwords where a character is a simple increment
+ or decrement of the previous character. In previous versions, the
+ embedded version of CrackLib allowed at most four such occurrences in
+ the entire password. This results in false positives on long
+ passphrases, since such accidental letter relationships aren't
+ uncommon in human languages. Change the embedded CrackLib to allow
+ one such simple increment for every three characters in the password,
+ which tightens the check somewhat for shorter passwords and loosens it
+ considerably for longer passwords.
+
+ Expect the Heimdal password strength checking plugin header in
+ kadm5/kadm5-pwcheck.h instead of outside of the kadm5 directory. This
+ is the path used by current versions of Heimdal. Drop support for
+ older versions of Heimdal that don't install this header file.
+
+ Update to rra-c-util 4.9:
+
+ * Probe for Kerberos headers using file checks instead of compiles.
+ * Improve probe for the Heimdal libroken library.
+ * Always build with large file support.
+ * Conditionally call AM_PROG_AR for portability to new Autotools.
+
+ Update to C TAP Harness 2.2:
+
+ * Allow more easily running single programs under tests/runtests.
+ * Flush the output from the test harness after each test.
+
+krb5-strength 1.1 (2012-05-11)
+
+ Change the minimum password length in the embedded CrackLib to 8.
+
+ Reject passwords formed from the username portion of the principal
+ with digits appended.
+
+ In the embedded CrackLib, also check for a duplicated dictionary word.
+
+ Support linking with the system CrackLib instead of the embedded and
+ stricter copy by passing --with-cracklib to configure.
+
+ Fix variable sizes in the embedded CrackLib on 64-bit platforms. This
+ may fix interoperability problems with databases created on platforms
+ with a different native integer size. Thanks, Karl Lehnberger and
+ Benj Carson.
+
+ Stop using local in the test suite for portability to Solaris /bin/sh.
+
+ Update to rra-c-util 4.4:
+
+ * Use PATH_KRB5_CONFIG to override krb5-config location.
+ * Fix probing for ibm_svc/krb5_svc.h on AIX.
+ * Support Heimdal libraries without libroken, like OpenBSD.
+ * Fix manual Kerberos library probing without transitive dependencies.
+ * Support systems that only have krb5/krb5.h.
+ * Pass --deps to krb5-config in the non-reduced-dependencies case.
+ * Silence __attribute__ warnings on more compilers.
+ * Update warning flags for make warnings.
+ * Flesh out MAINTCLEANFILES to remove autogen results.
+ * Add notices to all files copied from rra-c-util.
+
+ Update to C TAP Harness 1.12:
+
+ * Drop is_double from the C TAP library to avoid requiring -lm.
+ * Avoid using local in the shell libtap.sh library.
+ * Silence __attribute__ warnings on more compilers.
+ * runtests now frees all allocated resources on exit.
+ * Fix runtests to still honor SOURCE and -s without BUILD and -b.
+ * Add tests/HOWTO documenting how to add new tests.
+ * Ensure correct output ordering in test results.
+ * Add -h and a better usage message to tests/runtests.
+
+krb5-strength 1.0 (2010-02-16)
Add heimdal-strength, a program that checks password strength using
the protocol for a Heimdal external check program.
+ The shared module now also exports the interface expected by Heimdal's
+ dynamically loaded password strength checking API and can be used as a
+ Heimdal kadmin plugin.
+
+ Add a new plugin API for MIT Kerberos modelled after the plugin API
+ used for other MIT Kerberos plugins. Thanks to Marcus Watts for
+ substantial research and contributions to the interface design. This
+ work is incomplete in this release, missing the corresponding patch to
+ MIT Kerberos.
+
Fixed the data format written by the included packer program to add
enough nul bytes at the end of the data. Previously, there was not
enough trailing nul bytes for the expected input format, leading to
uninitialized memory reads in the password lookup.
+ Add a test suite using the driver and library from C TAP Harness 1.1.
+
+ Add portability code for platforms without a working snprintf or other
+ deficiencies and updated the code to take advantage of those
+ guarantees.
+
krb5-strength 0.5 (2007-07-18)
The check of the password against the principal checked against the
projects / kerberos / krb5-strength.git / blobdiff