User-Visible krb5-strength Changes
+krb5-strength 3.3 (2023-12-25)
+
+ heimdal-history now requires the Perl modules Const::Fast and
+ JSON::MaybeXS instead of Readonly and JSON.
+
+ Increase hash iterations for heimdal-history by about 10% to maintain
+ the time required for a password hash at about 0.1 seconds on not
+ horribly modern hardware. This will affect newly-stored history
+ entries but will not invalidate existing password history entries.
+
+ Explicitly erase the copy of the password made in the Heimdal plugin
+ before freeing memory.
+
+ Add a spec file for building RPMs, contributed by Daria Phoebe
+ Brashear.
+
+ Update to rra-c-util 10.5:
+
+ * Assume a working snprintf rather than supplying a replacement.
+ * Fix detection of reallocarray on NetBSD.
+ * Check that Kerberos header files were found during configure.
+ * Use AS_ECHO in all Autoconf macros.
+ * Always use lib32 or lib64 if it exists, even on Debian.
+ * Fix rejection of unknown Clang warning flags.
+ * Disable -Wreserved-identifier for Clang warning builds.
+
+krb5-strength 3.2 (2020-05-17)
+
+ Add new -c (--check-only) option to heimdal-history to check whether a
+ password would be accepted without updating the history or password
+ length databases. Based on work by macrotex.
+
+ Increase hash iterations for heimdal-history by roughly a factor of
+ four to increase the time required for a password hash to about 0.1
+ seconds on modern hardware. This will affect newly-stored history
+ entries but will not invalidate existing password history entries.
+
+ Support building without CrackLib support by passing
+ --without-cracklib to configure. This makes the code a bit simpler
+ and lighter if you don't intend to ever use the CrackLib support.
+
+ krb5-strength-wordlist now requires Perl 5.010 or later.
+
+ Use explicit_bzero instead of memset, where available, to overwrite
+ copies of passwords before freeing memory. This reduces the lifetime
+ of passwords in memory.
+
+ Skip tests that require the stronger rule configuration in the
+ embedded CrackLib when built against system CrackLib. This avoids
+ test failures when built with system CrackLib.
+
+ Rework the check-valgrind target to use the new C TAP Harness valgrind
+ support and automatically check the valgrind log files for errors at
+ the end of the test suite.
+
+ Add SPDX-License-Identifier headers to all substantial source files
+ other than those in the bundled version of CrackLib.
+
+ Update to rra-c-util 8.2:
+
+ * Implement explicit_bzero with memset if it is not available.
+ * Reformat all C source using clang-format 10.
+ * Work around Test::Strict not skipping .git directories.
+ * Fix warnings with perltidy 20190601 and Perl::Critic 1.134.
+ * Improve check for obsolete strings.
+ * Use a more standard all-permissive license.
+ * Add SPDX-License-Identifier headers to all substantial source files.
+ * Skip more build system files when running the test suite.
+ * Fix warnings with Clang 10, GCC 10, and the Clang static analyzer.
+ * Exclude more valgrind false positives with Kerberos libraries.
+ * Improve support for AIX's bundled Kerberos.
+
+ Update to C TAP Harness 4.7:
+
+ * Fix warnings with GCC 10.
+ * Reformat all C source using clang-format 10.
+ * Fixed malloc error checking in bstrndup.
+ * Add support for valgrind testing via test list options.
+ * Report test failures as left and right, not wanted and seen.
+ * Fix is_string comparisons involving NULL pointers and "(null)".
+ * Add SPDX-License-Identifier headers to all substantial source files.
+
+krb5-strength 3.1 (2016-12-25)
+
+ A new configuration option, cracklib_maxlen, can be set to skip
+ CrackLib checks of passwords longer than that length. The CrackLib
+ rules were designed in a world in which most passwords were four to
+ eight characters long and tend to spuriously reject longer passwords.
+ SQLite dictionaries work better for checking longer passwords and
+ passphrases. Patch from Jorj Bauer.
+
+ The require_classes configuration option can now require a particular
+ number of character classes in the password (whatever those classes
+ are). Patch from Toby Blake.
+
+ Change the error messages returned for passwords that fail strength
+ checking to start with a capital letter. This appears to be more
+ consistent with the error message conventions used inside Heimdal.
+
+ Change the DB_File::Lock calling method in heimdal-history to work
+ properly with the (buggy) CPAN version of DB_File::Lock, instead of
+ relying on Debian's patched version. Thanks to Bernt Jernberg for the
+ report.
+
+ Apply the SuSE patch for a buffer overflow when using duplicate rules
+ to the embedded CrackLib. No duplicating rules are used in the rule
+ set included with this package, and this package doesn't expose the
+ general API, so this was not exploitable, but best to close the latent
+ issue. (The other recent CrackLib vulnerability, CVE-2016-6318,
+ doesn't apply since all the GECOS manipulation code was removed from
+ the embedded CrackLib in this package.)
+
+ Patch the mkdict and packer in the embedded copy of CrackLib to force
+ C locale when sorting (avoiding a corrupted dictionary) and warn and
+ skip out-of-order words rather than creating a corrupted dictionary.
+ Patch from Mark Sirota.
+
+ Configuration instrutions are now in the heimdal-history and
+ heimdal-strength man pages and a new krb5-strength man page (which
+ documents configuration of the KDC plugin) instead of the README file
+ to make it more accessible after the software has been installed.
+
+ Update to rra-c-util 6.2:
+
+ * Use calloc in preference to malloc wherever appropriate.
+ * Use reallocarray in preference to realloc wherever appropriate.
+ * Suppress warnings from Kerberos headers under make warnings.
+ * Support the embedded Kerberos in Solaris 10 in library probes.
+ * Add missing va_end in xasprintf implementation.
+ * Fix logic in Test::RRA::Automake for new Automake dist checking.
+ * Fix all return-value checks for snprintf to avoid off-by-one error.
+ * Update warning flags for make warnings to GCC 6.1.0.
+ * Fix Test::RRA::Config for new "do" semantics in Perl 5.22.2.
+ * Add a new test for obsolete eyrie.org URLs.
+ * Require Test::Strict 0.25 or newer for Perl strictness checks.
+
+ Update to C TAP Harness 4.1:
+
+ * Replace all remaining uses of sprintf.
+ * Test lists may now have comments and blank lines.
+ * runtests -v will show the complete output from a test.
+ * Fix segfault in runtests when given an empty test list.
+ * Tests use C_TAP_SOURCE and C_TAP_BUILD instead of SOURCE and BUILD.
+
+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