---
- debug:
    msg: "Warning: empty 'evolinux_ssh_password_auth_addresses' variable, tasks will be skipped!"
  when: evolinux_ssh_password_auth_addresses == []

- name: Security directives for Evolinux
  blockinfile:
    dest: /etc/ssh/sshd_config
    block: |
      Match Group evolix
          PasswordAuthentication no
      Match Address {{ evolinux_ssh_password_auth_addresses | join(',') }}
          PasswordAuthentication yes
    marker: "# {mark} EVOLINUX PASSWORD RESTRICTIONS"
    insertafter: EOF
    validate: '/usr/sbin/sshd -T -f %s'
  notify: reload sshd
  when: evolinux_ssh_password_auth_addresses != []

# We disable AcceptEnv because it can be a security issue, but also because we
# do not want clients to push their environment variables like LANG.
- name: disable AcceptEnv in ssh config
  replace:
    dest: /etc/ssh/sshd_config
    regexp: '^AcceptEnv'
    replace: "#AcceptEnv"
  notify: reload sshd
  when: evolinux_ssh_disable_acceptenv

- name: Set log level to verbose (for Debian >= 9)
  replace:
    dest: /etc/ssh/sshd_config
    regexp: '^#?LogLevel [A-Z]+'
    replace: "LogLevel VERBOSE"
  notify: reload sshd
  when: ansible_distribution_major_version | version_compare('9', '>=')

- name: "Get current user"
  command: logname
  register: logname
  check_mode: no
  changed_when: False
  when: evolinux_ssh_allow_current_user

# we must double-escape caracters, because python
- name: verify AllowUsers directive
  shell: "grep -E '^AllowUsers' /etc/ssh/sshd_config"
  changed_when: False
  failed_when: False
  register: grep_allowusers_ssh
  check_mode: no
  when: evolinux_ssh_allow_current_user

- name: "Add AllowUsers sshd directive for current user"
  lineinfile:
    dest: /etc/ssh/sshd_config
    line: "\nAllowUsers {{ logname.stdout }}"
    insertafter: 'Subsystem'
    validate: '/usr/sbin/sshd -T -f %s'
  notify: reload sshd
  when: evolinux_ssh_allow_current_user and grep_allowusers_ssh.rc != 0

- name: "Modify AllowUsers sshd directive for current user"
  replace:
    dest: /etc/ssh/sshd_config
    regexp: '^(AllowUsers ((?!{{ logname.stdout }}).)*)$'
    replace: '\1 {{ logname.stdout }}'
    validate: '/usr/sbin/sshd -T -f %s'
  notify: reload sshd
  when: evolinux_ssh_allow_current_user and grep_allowusers_ssh.rc == 0

- meta: flush_handlers