---
- hosts: all
  vars:
    __sshd_test_backup_files:
      - /etc/ssh/sshd_config
      - /etc/ssh/sshd_config.d/00-ansible_system_role.conf
      - /etc/ssh/sshd_config_custom
      - /etc/ssh/sshd_config_custom_second
      - /tmp/ssh_host_ecdsa_key
  tasks:
    - name: "Backup configuration files"
      include_tasks: tasks/backup.yml

    - name: Ensure group 'nobody' exists
      group:
        name: nobody

    - name: Ensure the user 'nobody' exists
      user:
        name: nobody
        group: nobody
        comment: nobody
        create_home: no
        shell: /sbin/nologin

    - name: Configure alternative sshd_config file
      include_role:
        name: ansible-sshd
      vars:
        # just anything -- will not get processed by sshd
        sshd_config_file: /etc/ssh/sshd_config_custom
        sshd_config_owner: "nobody"
        sshd_config_group: "nobody"
        sshd_config_mode: "660"
        sshd:
          AcceptEnv: LANG
          Banner: /etc/issue
          Ciphers: aes256-ctr
        sshd_Compression: no

    - name: Configure second alternative sshd_config file
      include_role:
        name: ansible-sshd
      vars:
        # just anything -- will not get processed by sshd
        sshd_config_file: /etc/ssh/sshd_config_custom_second
        sshd_skip_defaults: true
        sshd:
          Banner: /etc/issue2
          Ciphers: aes128-ctr
        sshd_MaxStartups: 100

    - name: Now configure the main sshd_config file
      include_role:
        name: ansible-sshd
      vars:
        sshd_config_file: /etc/ssh/sshd_config
        sshd:
          Banner: /etc/issue
          Ciphers: aes192-ctr
          HostKey:
            - /tmp/ssh_host_ecdsa_key
        sshd_PasswordAuthentication: no

    - name: Verify the options are correctly set
      block:
        - meta: flush_handlers

        - name: Print current configuration file
          slurp:
            src: /etc/ssh/sshd_config_custom
          register: config

        - name: Get stat of the configuration file
          stat:
            path: /etc/ssh/sshd_config_custom
          register: config_stat

        - name: Print second configuration file
          slurp:
            src: /etc/ssh/sshd_config_custom_second
          register: config2

        - name: Print the main configuration file
          slurp:
            src: /etc/ssh/sshd_config
          register: config3

        - name: Check content of first configuration file
          assert:
            that:
              - "'AcceptEnv LANG' in config.content | b64decode"
              - "'Banner /etc/issue' in config.content | b64decode"
              - "'Ciphers aes256-ctr' in config.content | b64decode"
              - "'Compression no' in config.content | b64decode"

        - name: Check Fedora/RHEL9+ defaults are present in the first configuration file
          assert:
            that:
              - "'Include /etc/ssh/sshd_config.d/*.conf' in config.content | b64decode"
              - "'AuthorizedKeysFile .ssh/authorized_keys' in config.content | b64decode"
          when:
            - ansible_facts['os_family'] == 'RedHat'
            - ansible_facts['distribution_major_version']|int > 8

        - name: Check RHEL7 and RHEL8 defaults are present in the first configuration file
          assert:
            that:
              - "'X11Forwarding yes' in config.content | b64decode"
              - "'AuthorizedKeysFile .ssh/authorized_keys' in config.content | b64decode"
              - "'UsePAM yes' in config.content | b64decode"
          when:
            - ansible_facts['os_family'] == 'RedHat'
            - ansible_facts['distribution_major_version']|int > 6
            - ansible_facts['distribution_major_version']|int < 9

        - name: Check RHEL6 defaults are present in the first configuration file
          assert:
            that:
              - "'Protocol 2' in config.content | b64decode"
              - "'UsePAM yes' in config.content | b64decode"
          when:
            - ansible_facts['os_family'] == 'RedHat'
            - ansible_facts['distribution_major_version'] == '6'

        - name: Check Debian defaults are present in the first configuration file
          assert:
            that:
              - "'PrintMotd no' in config.content | b64decode"
              - "'UsePAM yes' in config.content | b64decode"
          when:
            - ansible_facts['os_family'] == 'Debian'
            - ansible_facts['distribution_major_version']|int < 22

        - name: Check Ubuntu 22 defaults are present in the first configuration file
          assert:
            that:
              - "'Include /etc/ssh/sshd_config.d/*.conf' in config3.content | b64decode"
              - "'KbdInteractiveAuthentication no' in config.content | b64decode"
              - "'UsePAM yes' in config.content | b64decode"
          when:
            - ansible_facts['distribution'] == 'Ubuntu'
            - ansible_facts['distribution_major_version']|int >= 22

        - name: Check content of second configuration file
          assert:
            that:
              - "'Banner /etc/issue2' in config2.content | b64decode"
              - "'Ciphers aes128-ctr' in config2.content | b64decode"
              - "'HostKey' not in config2.content | b64decode"
              - "'MaxStartups 100' in config2.content | b64decode"
              - "'Compression no' not in config2.content | b64decode"

        - name: Check content of the main configuration file
          assert:
            that:
              - "'Banner /etc/issue' in config3.content | b64decode"
              - "'Ciphers aes192-ctr' in config3.content | b64decode"
              - "'HostKey /tmp/ssh_host_ecdsa_key' in config3.content | b64decode"
              - "'PasswordAuthentication no' in config3.content | b64decode"
              - "'MaxStartups 100' not in config3.content | b64decode"
              - "'Compression no' not in config3.content | b64decode"

        - name: Check the main configuration file contains some default values for RHEL 9 or Fedora
          assert:
            that:
              - "'Include /etc/ssh/sshd_config.d/*.conf' in config3.content | b64decode"
              - "'AuthorizedKeysFile .ssh/authorized_keys' in config3.content | b64decode"
              - "'Subsystem sftp /usr/libexec/sftp-server' in config3.content | b64decode"
          when:
            - ansible_facts['os_family'] == 'RedHat'
            - ansible_facts['distribution_major_version']|int > 8

        - name: Check the generated config has requested properties
          assert:
            that:
              - config_stat.stat.exists
              - config_stat.stat.gr_name == 'nobody'
              - config_stat.stat.pw_name == 'nobody'
              - config_stat.stat.mode == '0660'
      tags: tests::verify

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