---
- name: Test SSH certificates options
  hosts: all
  vars:
    __sshd_test_backup_files:
      - /etc/ssh/sshd_config
      - /etc/ssh/sshd_config.d/00-ansible_system_role.conf
  tasks:
    - name: "Backup configuration files"
      ansible.builtin.include_tasks: tasks/backup.yml

    - name: Ensure group 'nobody' exists
      ansible.builtin.group:
        name: nobody

    - name: Ensure the user 'nobody' exists
      ansible.builtin.user:
        name: nobody
        group: nobody
        comment: nobody
        create_home: false
        shell: /sbin/nologin

    - name: Configure sshd
      ansible.builtin.include_role:
        name: ansible-sshd
      vars:
        sshd:
          PasswordAuthentication: false
          TrustedUserCAKeys: /etc/ssh/ca-keys/trusted-user-ca-keys.pub
          AuthorizedPrincipalsFile: "/etc/ssh/auth_principals/%u"
        sshd_trusted_user_ca_keys_list:
          - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICwqRjI9gAwkQF9iIylhRVAOFy2Joodh3fXJ7CbGWqUd
        # Key is the user in the os, values are *Principals* defined in the certificate
        sshd_principals:
          user:
            - principal
        sshd_config_file: /etc/ssh/sshd_config
        # very BAD example
        sshd_trustedusercakeys_directory_owner: "nobody"
        sshd_trustedusercakeys_directory_group: "nobody"
        sshd_trustedusercakeys_directory_mode: "0770"
        sshd_trustedusercakeys_file_owner: "nobody"
        sshd_trustedusercakeys_file_group: "nobody"
        sshd_trustedusercakeys_file_mode: "0750"
        sshd_authorizedprincipals_directory_owner: "nobody"
        sshd_authorizedprincipals_directory_group: "nobody"
        sshd_authorizedprincipals_directory_mode: "0777"
        sshd_authorizedprincipals_file_owner: "nobody"
        sshd_authorizedprincipals_file_group: "nobody"
        sshd_authorizedprincipals_file_mode: "0755"

    - name: Verify the options are correctly set
      tags: tests::verify
      block:
        - name: Flush handlers
          ansible.builtin.meta: flush_handlers

        - name: Print current configuration file
          ansible.builtin.slurp:
            src: /etc/ssh/sshd_config
          register: config

        - name: Check the options are in configuration file
          ansible.builtin.assert:
            that:
              - "'PasswordAuthentication no' in config.content | b64decode"
              - "'TrustedUserCAKeys /etc/ssh/ca-keys/trusted-user-ca-keys.pub' in config.content | b64decode"
              - "'AuthorizedPrincipalsFile /etc/ssh/auth_principals/%u' in config.content | b64decode"

        - name: Get trusted user CA keys directory stat
          ansible.builtin.stat:
            path: /etc/ssh/ca-keys
          register: trustedusercakeys_directory_stat

        - name: Check trusted user CA keys directory has requested properties
          ansible.builtin.assert:
            that:
              - trustedusercakeys_directory_stat.stat.isdir
              - trustedusercakeys_directory_stat.stat.pw_name == "nobody"
              - trustedusercakeys_directory_stat.stat.gr_name == "nobody"
              - trustedusercakeys_directory_stat.stat.mode == "0770"

        - name: Get trusted user CA keys file stat
          ansible.builtin.stat:
            path: /etc/ssh/ca-keys/trusted-user-ca-keys.pub
          register: trustedusercakeys_file_stat

        - name: Check trusted user CA keys file has requested properties
          ansible.builtin.assert:
            that:
              - trustedusercakeys_file_stat.stat.exists
              - trustedusercakeys_file_stat.stat.pw_name == "nobody"
              - trustedusercakeys_file_stat.stat.gr_name == "nobody"
              - trustedusercakeys_file_stat.stat.mode == "0750"

        - name: Get authorized principals directory stat
          ansible.builtin.stat:
            path: /etc/ssh/auth_principals
          register: authorizedprincipals_directory_stat

        - name: Check authorized principals directory has requested properties
          ansible.builtin.assert:
            that:
              - authorizedprincipals_directory_stat.stat.isdir
              - authorizedprincipals_directory_stat.stat.pw_name == "nobody"
              - authorizedprincipals_directory_stat.stat.gr_name == "nobody"
              - authorizedprincipals_directory_stat.stat.mode == "0777"

        - name: Get authorized principals file stat
          ansible.builtin.stat:
            path: /etc/ssh/auth_principals/user
          register: authorizedprincipals_file_stat

        - name: Check authorized principals file has requested properties
          ansible.builtin.assert:
            that:
              - authorizedprincipals_file_stat.stat.exists
              - authorizedprincipals_file_stat.stat.pw_name == "nobody"
              - authorizedprincipals_file_stat.stat.gr_name == "nobody"
              - authorizedprincipals_file_stat.stat.mode == "0755"

    - name: "Restore configuration files"
      ansible.builtin.include_tasks: tasks/restore.yml