Wordle - but as a Linux-PAM module!
Note: Tested on Ubuntu 20.04.4. This documentation may not be accurate for other systems.
Requirements: gcc and libpam0g-dev
apt install gcc libpam0g-dev -y
Compile and link:
gcc -fPIC -c wordle.c
sudo ld -x --shared -o /lib/x86_64-linux-gnu/security/pam_wordle.so wordle.o
In order to use pam-wordle you must edit the Linux-PAM configuration in /etc/pam.d.
For example, if you wish to ensure all sudo users know their vocabulary, replace /etc/pam.d/sudo with the following:
session required pam_env.so readenv=1 user_readenv=0
session required pam_env.so readenv=1 envfile=/etc/default/locale user_readenv=0
auth required pam_unix.so
auth required pam_wordle.so
@include common-account
@include common-session-noninteractive
pam-wordle uses 5 character long words from /usr/share/dict/words for its dictionary.
If the dictionary is not present pam-wordle will complain via error messages and only use the word linux.
An American English wordlist can be installed via the wamerican package:
apt install wamerican -y