Red Hat Bugzilla – Bug 1007893
Add an option to pwquality to specify minimum number of character in each class.
Last modified: 2014-06-18 03:09:11 EDT
Description of problem:
Currently pam_cracklib/pam_pwquality does not have an option to specify the "minimum number of character in each class". We can specify the number of characters required for each class (by using -weight) however this is not sufficient in some situations, for example:
Minimum length: 12
Minimum number of classes: 3
Minimum number of character in each class: 2
Cracklib/pwquality attempt is below:
password required pam_cracklib.so try_first_pass minclass=3 difok=4 retry=3 minlen=12 lcredit=-2 ucredit=-2 dcredit=-2 ocredit=-2
However, since -2 is specified for each class, pam is enforcing 4 classes. We cannot specify, the password only require 3 classes, but at least 2 characters for each class.