kubeasz/roles/os-harden/tasks/pam.yml

---
- name: update pam on Debian systems
  command: 'pam-auth-update --package'
  when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'
  changed_when: False
  environment:
    DEBIAN_FRONTEND: noninteractive

# the reason for this is so a user cannot connect to a server,
# that isn't connected to an LDAP server anymore.
# normally caching credentials shouldn't be necessary for most machines.
# removing it provides some more security while not removing usability.
- name: remove pam ccreds to disable password caching
  package:
    name: '{{ os_packages_pam_ccreds }}'
    state: 'absent'

- name: remove pam_cracklib, because it does not play nice with passwdqc
  apt:
    name: '{{ os_packages_pam_cracklib }}'
    state: 'absent'
  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and os_auth_pam_passwdqc_enable

- name: install the package for strong password checking
  apt:
    name: '{{ os_packages_pam_passwdqc }}'
    state: 'present'
    update_cache: 'yes'
  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and os_auth_pam_passwdqc_enable

- name: configure passwdqc
  template:
    src: 'usr/share/pam-configs/pam_passwdqd.j2'
    dest: '{{ passwdqc_path }}'
    mode: '0644'
    owner: 'root'
    group: 'root'
  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and os_auth_pam_passwdqc_enable

- name: remove passwdqc
  apt:
    name: '{{ os_packages_pam_passwdqc }}'
    state: 'absent'
  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and not os_auth_pam_passwdqc_enable

- name: install tally2
  apt:
    name: 'libpam-modules'
    state: 'present'
  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and not os_auth_pam_passwdqc_enable and os_auth_retries > 0

- name: configure tally2
  template:
    src: 'usr/share/pam-configs/pam_tally2.j2'
    dest: '{{ tally2_path }}'
    mode: '0644'
    owner: 'root'
    group: 'root'
  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and not os_auth_pam_passwdqc_enable and os_auth_retries > 0

- name: delete tally2 when retries is 0
  file:
    path: '{{ tally2_path }}'
    state: 'absent'
  when: (ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu') and not os_auth_pam_passwdqc_enable and os_auth_retries == 0

- name: remove pam_cracklib, because it does not play nice with passwdqc
  yum:
    name: '{{ os_packages_pam_cracklib }}'
    state: 'absent'
  when: (ansible_os_family == 'RedHat' and ansible_distribution_version < '7' and not ansible_distribution == 'Amazon') and os_auth_pam_passwdqc_enable

- name: install the package for strong password checking
  yum:
    name: '{{ os_packages_pam_passwdqc }}'
    state: 'present'
  when: (ansible_os_family == 'RedHat' and ansible_distribution_version < '7' and not ansible_distribution == 'Amazon') and os_auth_pam_passwdqc_enable

- name: remove passwdqc
  yum:
    name: '{{ os_packages_pam_passwdqc }}'
    state: 'absent'
  when: ansible_os_family == 'RedHat' and not os_auth_pam_passwdqc_enable

- name: configure passwdqc and tally via central system-auth confic
  template:
    src: 'etc/pam.d/rhel_system_auth.j2'
    dest: '/etc/pam.d/system-auth-ac'
    mode: '0640'
    owner: 'root'
    group: 'root'

- name: NSA 2.3.3.5 Upgrade Password Hashing Algorithm to SHA-512
  template:
    src: 'etc/rhel_libuser.conf.j2'
    dest: '/etc/libuser.conf'
    mode: '0640'
    owner: 'root'
    group: 'root'