The upstream patch actually has a bug, the argument is off by one. Reported & sent patch: https://bugs.openldap.org/show_bug.cgi?id=10399
** Bug watch added: bugs.openldap.org/ #10399 https://bugs.openldap.org/show_bug.cgi?id=10399 ** Description changed: [ Impact ] Add configurable rounds for pw-pbkdf2.so module Without the ability to configure the iteration count, it is not possible to meet current security best practices or achieve compliance with FIPS 140-3, which requires configurable and sufficiently high iteration counts for PBKDF2. [ Test Plan ] * install slapd and slapd-contrib * only supports hardcoded 10000 rounds: slappasswd -o module-load=pw-pbkdf2.so -h {PBKDF2-SHA512} + -> observe {PBKDF2-SHA512}10000$... * after update, any round number can be configured: slappasswd -o module-load="pw-pbkdf2.so 1337" -h {PBKDF2-SHA512} + -> observe {PBKDF2-SHA512}1337$... [ Where problems could occur ] * pbkdf2 password validation/hashing could get a regression * Due to the configurable number amount, old passwords could become invalid due do different round counts - [ Original Report ] On Ubuntu 24.04, the OpenLDAP package ships with the library /usr/lib/ldap/pw-pbkdf2.so. While this module works for generating PBKDF2-SHA512 password hashes, it does not provide an option to configure the number of iterations. For example: slappasswd -o module-load=pw-pbkdf2.so -h {PBKDF2-SHA512} generates a hash with a fixed iteration count (e.g. 10000) and does not accept parameters to increase it. In contrast, the upstream contrib module passwd/pbkdf2 on https://git.openldap.org/openldap/openldap/-/tree/master/contrib/slapd- modules/passwd/pbkdf2 supports the iteration count option and allows administrators to configure it. moduleload pw-pbkdf2.so [iterations] Steps to reproduce: Install OpenLDAP on Ubuntu 24.04. (slapd and slapd-contrib pakages) Run slappasswd -o module-load=pw-pbkdf2.la -h {PBKDF2} -s secret {PBKDF2}10000$ZvU8GRSybbefW48n8BeyuA$XE1t4W09ZP0z8zmLVb/SbwaOl2Y -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2125685 Title: pbkdf2 module not make iterations configurable and FIPS 140-3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openldap/+bug/2125685/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
