#
# Cookbook Name:: mu-activedirectory
# Recipe:: sssd
#
# Copyright:: Copyright (c) 2016 eGlobalTech, Inc., all rights reserved
#
# Licensed under the BSD-3 license (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License in the root of the project or at
#
#     http://egt-labs.com/mu/LICENSE.html
#
# 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.

case node['platform_family']
  when "rhel"

    %w{sshd winbind smb messagebus}.each { |svc|
      begin
        resources('service['+svc+']')
      rescue Chef::Exceptions::ResourceNotFound
        service svc do
          action [:enable, :start]
          only_if { ::File.exists?("/etc/init.d/#{svc}") }
        end
      end
    }

    begin
      resources('service[network]')
    rescue Chef::Exceptions::ResourceNotFound
      service "network" do
        only_if { ::File.exists?("/etc/init.d/network") }
      end
    end

    packages = %w(epel-release dbus sssd sssd-ldap sssd-ad authconfig nscd oddjob-mkhomedir krb5-devel)

    package packages

    packages_uninstall = %w(nss-pam-ldapd pam_ldap)
    
    package packages_uninstall do
      action :remove
    end


    case elversion
    when 7
      package "adcli"
      # trying to make sure Chef doesn’t try to start the service if it's already started
      execute "sed -i 's/--nopidfile//' /usr/lib/systemd/system/messagebus.service && systemctl daemon-reload" do
        only_if "grep '\--nopidfile' /usr/lib/systemd/system/messagebus.service"
      end
    end

    service "nscd" do
      action [:disable, :stop]
    end

    execute "restorecon -r /usr/sbin"

    # SELinux Policy for oddjobd and its interaction with syslogd
    cookbook_file "syslogd_oddjobd.pp" do
      path "#{Chef::Config[:file_cache_path]}/syslogd_oddjobd.pp"
    end

    execute "Add oddjobd and syslogd interaction to SELinux allow list" do
      command "/usr/sbin/semodule -i syslogd_oddjobd.pp"
      cwd Chef::Config[:file_cache_path]
      not_if "/usr/sbin/semodule -l | grep syslogd_oddjobd"
      notifies :restart, "service[oddjobd]", :delayed
    end

    case elversion
    when 6
      service "oddjobd" do
        start_command "sh -x /etc/init.d/oddjobd start" # seems to actually work
        action [:enable, :start]
      end
      package %w(git automake libtool openldap-devel libxslt-devel)

      git 'Clone ADCLI' do
        repository 'git clone git://anongit.freedesktop.org/realmd/adcli'
        revision 'master'
        destination '/root'
        action :sync
      end
      
      # execute "git clone git://anongit.freedesktop.org/realmd/adcli" do
      #   cwd "/root"
      #   not_if { ::Dir.exists?("/root/adcli") }
      # end

      # execute "git fetch && git pull" do
      #   cwd "/root/adcli"
      # end

      build_essential 'name' do
        compile_time  True
      end

      # This is our workaround until the RPM makes it way back into a repo
      # somewhere. It was removed from EPEL after it became part of mainstream
      # RHEL 6.8, but CentOS doesn't have it yet.
      execute "compile adcli" do
        cwd "/root/adcli"
        command "./autogen.sh --disable-doc --prefix=/usr && make && make install"
        not_if { ::File.exists?("/usr/sbin/adcli") }
      end
    when 7
      # Seems to work on CentOS7
      service "oddjobd" do
        action [:enable, :start]
      end
    end

    execute "/usr/sbin/authconfig --disablenis --disablecache --disablewinbind --disablewinbindauth --enablemkhomedir --disablekrb5 --enablesssd --enablesssdauth --enablelocauthorize --disableforcelegacy --disableldap --disableldapauth --updateall" do
      notifies :restart, "service[oddjobd]", :immediately
      notifies :reload, "service[sshd]", :delayed
      not_if "grep pam_sss.so /etc/pam.d/password-auth"
    end

    include_recipe 'chef-vault'
    domain_creds = chef_vault_item(node['ad']['join_auth']['vault'], node['ad']['join_auth']['item'])

    service "sssd" do
      action :nothing
      notifies :restart, "service[sshd]", :immediately
      only_if { ::File.exists?("/etc/krb5.keytab") }
    end
    directory "/etc/sssd"
    template "/etc/sssd/sssd.conf" do
      source "sssd.conf.erb"
      mode 0600
      cookbook "mu-activedirectory"
      notifies :restart, "service[sssd]", :immediately
      variables(
        :domain => node['ad']['domain_name'],
        'homedir' => node['ad']['homedir'],
        :krb5keytabuser => node['ad']['computer_name'],
        :short_domain => node['ad']['netbios_name'],
        :base_dn => node['ad']['domain_name'].split(/\./).map { |x| "dc=#{x}" }.join(","),
        :dcs => node['ad']['dc_ips']
      )
    end

    template "/etc/dhcp/dhclient-eth0.conf" do
      source "dhclient-eth0.conf.erb"
      mode 0644
      variables(
        :domain => node['ad']['domain_name'],
        'dc_ips' => node['ad']['dc_ips']
      )
      notifies :restart, "service[network]", :immediately unless %w{redhat centos}.include?(node['platform']) && node['platform_version'].to_i == 7
    end

    # If adcli fails mysteriously, look for bogus /etc/hosts entries pointing
    # to your DCs. It seems to dumbly trust any reverse mapping it sees,
    # whether or not the name matches the actual Kerberos tickets you et.
    execute "Run ADCLI" do
      not_if { ::File.exists?("/etc/krb5.keytab") }
      command "echo -n '#{domain_creds[node['ad']['join_auth']['password_field']]}' | /usr/sbin/adcli join #{node['ad']['domain_name']} --domain-realm=#{node['ad']['domain_name'].upcase} -U #{domain_creds[node['ad']['join_auth']['username_field']]} --stdin-password"
      notifies :restart, "service[sssd]", :immediately
#      sensitive true
    end

    template "/etc/krb5.conf" do
      source "krb5.conf.erb"
      mode 0444
      cookbook "mu-activedirectory"
      notifies :restart, "service[sssd]", :immediately
      variables(
        'domain_name' => node['ad']['domain_name'],
        :dcs => node['ad']['dc_ips']
      )
    end

  else
    Chef::Log.info("Unsupported platform #{node['platform']}")
end