---

# Copyright 2019 Nokia

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

- name: Ssh protocol setting
  ssh_conf:
    regexp: '[\s]*Protocol'
    values: "Protocol 2\n"

- name: Disable ssh root login
  ssh_conf:
    regexp: '[\s]*PermitRootLogin [y|n]'
    values: "PermitRootLogin no\n"

- name: Listening address setting
  ssh_conf:
    regexp: '[\s]*ListenAddress'
    values: "ListenAddress 0.0.0.0\n"

- name: Disable the hostbasedauthentication
  ssh_conf:
    regexp: '[\s]*HostbasedAuthentication [y|n]'
    values: "HostbasedAuthentication no\n"

- name: Disable the passwordauthentication
  ssh_conf:
    regexp: '[\s]*PasswordAuthentication [y|n]'
    values: "PasswordAuthentication yes\n"

- name: Disable the empty password
  ssh_conf:
    regexp: '[\s]*PermitEmptyPasswords [y|n]'
    values: "PermitEmptyPasswords no\n"

- name: Ciphers setting
  ssh_conf:
    regexp: '[\s]*Ciphers'
    values: "Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com\n"

- name: MACs setting
  ssh_conf:
    regexp: '[\s]*MACs'
    values: "MACs hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com\n"

- name: Login Gracetime setting
  ssh_conf:
    regexp: '[\s]*LoginGraceTime'
    values: "LoginGraceTime 60\n"

- name: User Alive Interval setting
  ssh_conf:
    regexp: '[\s]*ClientAliveInterval'
    values: "ClientAliveInterval 300\n"

- name: Disable the X11forwarding
  ssh_conf:
    regexp: '[\s]*X11Forwarding [y|n]'
    values: "X11Forwarding no\n"

- name: Disable SSH agent forwarding
  ssh_conf:
    regexp: '[\s]*AllowAgentForwarding [y|n]'
    values: "AllowAgentForwarding no\n"

- name: Disable TCP forwarding
  ssh_conf:
    regexp: '[\s]*AllowTcpForwarding [y|n]'
    values: "AllowTcpForwarding no\n"

- name: Activate the strict mode
  ssh_conf:
    regexp: '[\s]*StrictModes [y|n]'
    values: "StrictModes yes\n"

- name: Port setting
  ssh_conf:
    regexp: '[\s]*Port'
    values: "Port 22\n"

- name: HostKeyAlgorithms setting
  ssh_conf:
    regexp: '[\s]*HostKeyAlgorithms'
    values: "HostKeyAlgorithms ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-rsa-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ssh-ed25519\n"

- name: PubkeyAcceptedKeyTypes setting
  ssh_conf:
    regexp: '[\s]*PubkeyAcceptedKeyTypes'
    values: "PubkeyAcceptedKeyTypes ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-rsa-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ssh-ed25519\n"

- name: KexAlgorithms
  ssh_conf:
    regexp: '[\s]*KexAlgorithms'
    values: "KexAlgorithms curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256\n"

- name: MaxAuthTries setting
  ssh_conf:
    regexp: '[\s]*MaxAuthTries'
    values: "MaxAuthTries 3\n"

- name: "Limit interactive session count to 2"
  ssh_conf:
    regexp: '[\s]*MaxSessions'
    values: "MaxSessions 2\n"

- name: Banner creation
  ssh_conf:
    regexp: '[\s]*Banner'
    values: "Banner /etc/banner\n"

- name: "Disable Keepalive"
  ssh_conf:
    regexp: '[\s]*TCPKeepAlive'
    values: "TCPKeepAlive no\n"

- name: "Enable the Ipv6"
  lineinfile:
    path: /etc/ssh/sshd_config
    insertafter: '^[\s]*ListenAddress 0.0.0.0'
    line: 'ListenAddress ::'

- name: "Disable Kerberos Authentication"
  ssh_conf:
    regexp: '[\s]*KerberosAuthentication'
    values: "KerberosAuthentication no\n"

- name: "Enable Use of Privilege Separation"
  ssh_conf:
    regexp: '[\s]*UsePrivilegeSeparation'
    values: "UsePrivilegeSeparation sandbox\n"

- name: "Disable Compression"
  ssh_conf:
    regexp: '[\s]*Compression'
    values: "Compression no\n"

- name: "Set SSH Client Alive Count"
  ssh_conf:
    regexp: '[\s]*ClientAliveCountMax'
    values: "ClientAliveCountMax 0\n"

- name: "Limit logins to members of admin, keystone, and ironic groups"
  ssh_conf:
    regexp: '[\s]*AllowGroups'
    values: "AllowGroups {{ users['admin_user_name'] }} {{ keystone_system_group_name |default('keystone') }} {{ ironic_system_group_name | default('ironic') }}\n"

- name: "Disable SSH Support for User Known Hosts"
  ssh_conf:
    regexp: '[\s]*IgnoreUserKnownHosts'
    values: "IgnoreUserKnownHosts yes\n"

- name: "Do Not Allow SSH Environment Options"
  ssh_conf:
    regexp: '[\s]*PermitUserEnvironment'
    values: "PermitUserEnvironment no\n"

- service:
    name: sshd
    state: restarted

- name: create a banner file
  lineinfile:
    path: /etc/banner
    create: yes
    regexp: '^.*'
    state: present
    line: "This is a PRIVATE computer system. All unauthorized use or unauthorized access is prohibited according to local laws and may lead to prosecution. Your operations are logged."

- name: "Set the maximum number of days a ssh password may be used."
  lineinfile:
    path: /etc/login.defs
    regexp: '^PASS_MAX_DAYS[\s]*[0-9]*$'
    line: 'PASS_MAX_DAYS   90'

- name: "Set the number of days warning given before a password expires."
  lineinfile:
    path: /etc/login.defs
    regexp: '^PASS_WARN_AGE[\s]*[0-9]*$'
    line: 'PASS_WARN_AGE   5'

- name: "Set the unique last password count."
  lineinfile:
    path: /etc/pam.d/system-auth-ac
    regexp: '^password[\s]*sufficient.*pam_unix.so(.*)$'
    line: 'password    sufficient    pam_unix.so\1 remember=12'
    backrefs: yes