# platform = multi_platform_all
# reboot = false
# strategy = restrict
# complexity = low
# disruption = low
- name: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - audit_rules_networkconfig_modification_hostname_file
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - restrict_strategy

- name: Record Events that Modify the System's Network Environment - /etc/hostname
    - Check if watch rule for /etc/hostname already exists in /etc/audit/rules.d/
  ansible.builtin.find:
    paths: /etc/audit/rules.d
    contains: ^\s*-w\s+/etc/hostname\s+-p\s+wa(\s|$)+
    patterns: '*.rules'
  register: find_existing_watch_rules_d
  when:
  - '"auditd" in ansible_facts.packages'
  - '"linux-base" in ansible_facts.packages'
  tags:
  - audit_rules_networkconfig_modification_hostname_file
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - restrict_strategy

- name: Record Events that Modify the System's Network Environment - /etc/hostname
    - Search /etc/audit/rules.d for other rules with specified key audit_rules_networkconfig_modification_hostname_file
  ansible.builtin.find:
    paths: /etc/audit/rules.d
    contains: ^.*(?:-F key=|-k\s+)audit_rules_networkconfig_modification_hostname_file$
    patterns: '*.rules'
  register: find_watch_key
  when:
  - '"auditd" in ansible_facts.packages'
  - '"linux-base" in ansible_facts.packages'
  - find_existing_watch_rules_d.matched is defined and find_existing_watch_rules_d.matched
    == 0
  tags:
  - audit_rules_networkconfig_modification_hostname_file
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - restrict_strategy

- name: Record Events that Modify the System's Network Environment - /etc/hostname
    - Use /etc/audit/rules.d/audit_rules_networkconfig_modification_hostname_file.rules
    as the recipient for the rule
  ansible.builtin.set_fact:
    all_files:
    - /etc/audit/rules.d/audit_rules_networkconfig_modification_hostname_file.rules
  when:
  - '"auditd" in ansible_facts.packages'
  - '"linux-base" in ansible_facts.packages'
  - find_watch_key.matched is defined and find_watch_key.matched == 0 and find_existing_watch_rules_d.matched
    is defined and find_existing_watch_rules_d.matched == 0
  tags:
  - audit_rules_networkconfig_modification_hostname_file
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - restrict_strategy

- name: Record Events that Modify the System's Network Environment - /etc/hostname
    - Use matched file as the recipient for the rule
  ansible.builtin.set_fact:
    all_files:
    - '{{ find_watch_key.files | map(attribute=''path'') | list | first }}'
  when:
  - '"auditd" in ansible_facts.packages'
  - '"linux-base" in ansible_facts.packages'
  - find_watch_key.matched is defined and find_watch_key.matched > 0 and find_existing_watch_rules_d.matched
    is defined and find_existing_watch_rules_d.matched == 0
  tags:
  - audit_rules_networkconfig_modification_hostname_file
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - restrict_strategy

- name: Record Events that Modify the System's Network Environment - /etc/hostname
    - Add watch rule for /etc/hostname in /etc/audit/rules.d/
  ansible.builtin.lineinfile:
    path: '{{ all_files[0] }}'
    line: -w /etc/hostname -p wa -k audit_rules_networkconfig_modification_hostname_file
    create: true
    mode: '0600'
  when:
  - '"auditd" in ansible_facts.packages'
  - '"linux-base" in ansible_facts.packages'
  - find_existing_watch_rules_d.matched is defined and find_existing_watch_rules_d.matched
    == 0
  tags:
  - audit_rules_networkconfig_modification_hostname_file
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - restrict_strategy

- name: Record Events that Modify the System's Network Environment - /etc/hostname
    - Check if watch rule for /etc/hostname already exists in /etc/audit/audit.rules
  ansible.builtin.find:
    paths: /etc/audit/
    contains: ^\s*-w\s+/etc/hostname\s+-p\s+wa(\s|$)+
    patterns: audit.rules
  register: find_existing_watch_audit_rules
  when:
  - '"auditd" in ansible_facts.packages'
  - '"linux-base" in ansible_facts.packages'
  tags:
  - audit_rules_networkconfig_modification_hostname_file
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - restrict_strategy

- name: Record Events that Modify the System's Network Environment - /etc/hostname
    - Add watch rule for /etc/hostname in /etc/audit/audit.rules
  ansible.builtin.lineinfile:
    line: -w /etc/hostname -p wa -k audit_rules_networkconfig_modification_hostname_file
    state: present
    dest: /etc/audit/audit.rules
    create: true
    mode: '0600'
  when:
  - '"auditd" in ansible_facts.packages'
  - '"linux-base" in ansible_facts.packages'
  - find_existing_watch_audit_rules.matched is defined and find_existing_watch_audit_rules.matched
    == 0
  tags:
  - audit_rules_networkconfig_modification_hostname_file
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - restrict_strategy
