Fix #942: Seamless LDAP login (#6556)

app/controllers/application_controller.rb

@@ -14,7 +14,7 @@ class ApplicationController < ActionController::Base
   helper_method :current_session
   helper_method :current_theme
   helper_method :single_user_mode?
-  helper_method :use_pam?
+  helper_method :use_seamless_external_login?
 
   rescue_from ActionController::RoutingError, with: :not_found
   rescue_from ActiveRecord::RecordNotFound, with: :not_found
@@ -76,8 +76,8 @@ class ApplicationController < ActionController::Base
     @single_user_mode ||= Rails.configuration.x.single_user_mode && Account.exists?
   end
 
-  def use_pam?
-    Devise.pam_authentication
+  def use_seamless_external_login?
+    Devise.pam_authentication || Devise.ldap_authentication
   end
 
   def current_account

app/controllers/auth/sessions_controller.rb

@@ -37,7 +37,7 @@ class Auth::SessionsController < Devise::SessionsController
     if session[:otp_user_id]
       User.find(session[:otp_user_id])
     elsif user_params[:email]
-      if use_pam? && Devise.check_at_sign && user_params[:email].index('@').nil?
+      if use_seamless_external_login? && Devise.check_at_sign && user_params[:email].index('@').nil?
         User.joins(:account).find_by(accounts: { username: user_params[:email] })
       else
         User.find_for_authentication(email: user_params[:email])

app/models/user.rb

@@ -52,7 +52,6 @@ class User < ApplicationRecord
   devise :registerable, :recoverable, :rememberable, :trackable, :validatable,
          :confirmable
 
-  devise :pam_authenticatable if Devise.pam_authentication
   devise :omniauthable
 
   belongs_to :account, inverse_of: :user
@@ -117,6 +116,12 @@ class User < ApplicationRecord
     acc.destroy! unless save
   end
 
+  def ldap_setup(_attributes)
+    self.confirmed_at = Time.now.utc
+    self.admin = false
+    save!
+  end
+
   def confirmed?
     confirmed_at.present?
   end
@@ -247,17 +252,17 @@ class User < ApplicationRecord
   end
 
   def password_required?
-    return false if Devise.pam_authentication
+    return false if Devise.pam_authentication || Devise.ldap_authentication
     super
   end
 
   def send_reset_password_instructions
-    return false if encrypted_password.blank? && Devise.pam_authentication
+    return false if encrypted_password.blank? && (Devise.pam_authentication || Devise.ldap_authentication)
     super
   end
 
   def reset_password!(new_password, new_password_confirmation)
-    return false if encrypted_password.blank? && Devise.pam_authentication
+    return false if encrypted_password.blank? && (Devise.pam_authentication || Devise.ldap_authentication)
     super
   end
 
@@ -280,6 +285,17 @@ class User < ApplicationRecord
     end
   end
 
+  def self.ldap_get_user(attributes = {})
+    resource = joins(:account).find_by(accounts: { username: attributes[Devise.ldap_uid.to_sym].first })
+
+    if resource.blank?
+      resource = new(email: attributes[:mail].first, account_attributes: { username: attributes[Devise.ldap_uid.to_sym].first })
+      resource.ldap_setup(attributes)
+    end
+
+    resource
+  end
+
   def self.authenticate_with_pam(attributes = {})
     return nil unless Devise.pam_authentication
     super

app/views/auth/passwords/edit.html.haml

@@ -4,7 +4,7 @@
 = simple_form_for(resource, as: resource_name, url: password_path(resource_name), html: { method: :put }) do |f|
   = render 'shared/error_messages', object: resource
 
-  - if !use_pam? || resource.encrypted_password.present?
+  - if !use_seamless_external_login?? || resource.encrypted_password.present?
     = f.input :reset_password_token, as: :hidden
 
     = f.input :password, autofocus: true, placeholder: t('simple_form.labels.defaults.new_password'), input_html: { 'aria-label' => t('simple_form.labels.defaults.new_password'), :autocomplete => 'off' }
@@ -13,6 +13,6 @@
     .actions
       = f.button :button, t('auth.set_new_password'), type: :submit
   - else
-    = t('simple_form.labels.defaults.pam_account')
+    %p.hint= t('users.seamless_external_login')
 
 .form-footer= render 'auth/shared/links'

app/views/auth/registrations/edit.html.haml

@@ -4,7 +4,7 @@
 = simple_form_for(resource, as: resource_name, url: registration_path(resource_name), html: { method: :put, class: 'auth_edit' }) do |f|
   = render 'shared/error_messages', object: resource
 
-  - if !use_pam? || resource.encrypted_password.present?
+  - if !use_seamless_external_login? || resource.encrypted_password.present?
     = f.input :email, placeholder: t('simple_form.labels.defaults.email'), input_html: { 'aria-label' => t('simple_form.labels.defaults.email') }
     = f.input :password, placeholder: t('simple_form.labels.defaults.new_password'), input_html: { 'aria-label' => t('simple_form.labels.defaults.new_password'), :autocomplete => 'off' }
     = f.input :password_confirmation, placeholder: t('simple_form.labels.defaults.confirm_new_password'), input_html: { 'aria-label' => t('simple_form.labels.defaults.confirm_new_password'), :autocomplete => 'off' }
@@ -13,7 +13,7 @@
     .actions
       = f.button :button, t('generic.save_changes'), type: :submit
   - else
-    = t('simple_form.labels.defaults.pam_account')
+    %p.hint= t('users.seamless_external_login')
 
 %hr/
 

app/views/auth/sessions/new.html.haml

@@ -5,7 +5,7 @@
   = render partial: 'shared/og'
 
 = simple_form_for(resource, as: resource_name, url: session_path(resource_name)) do |f|
-  - if use_pam?
+  - if use_seamless_external_login?
     = f.input :email, autofocus: true, placeholder: t('simple_form.labels.defaults.username_or_email'), required: true, input_html: { 'aria-label' => t('simple_form.labels.defaults.username_or_email') }
   - else
     = f.input :email, autofocus: true, placeholder: t('simple_form.labels.defaults.email'), required: true, input_html: { 'aria-label' => t('simple_form.labels.defaults.email') }