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Fix authentication before 2FA challenge (#11943) 

Regression from #11831
This commit is contained in:
Eugen Rochko 2019-09-24 04:35:36 +02:00 committed by GitHub
parent 67bef15e53
commit a1f04c1e34
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7 changed files with 140 additions and 99 deletions
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61
app/controllers/auth/sessions_controller.rb
View File

@ -8,6 +8,8 @@ class Auth::SessionsController < Devise::SessionsController
skip_before_action :require_no_authentication, only: [:create]
skip_before_action :require_functional!
prepend_before_action :authenticate_with_two_factor, if: :two_factor_enabled?, only: [:create]
before_action :set_instance_presenter, only: [:new]
before_action :set_body_classes
@ -20,22 +22,9 @@ class Auth::SessionsController < Devise::SessionsController
end
def create
self.resource = begin
if user_params[:email].blank? && session[:otp_user_id].present?
User.find(session[:otp_user_id])
else
warden.authenticate!(auth_options)
end
end
if resource.otp_required_for_login?
if user_params[:otp_attempt].present? && session[:otp_user_id].present?
authenticate_with_two_factor_via_otp(resource)
else
prompt_for_two_factor(resource)
end
else
authenticate_and_respond(resource)
super do |resource|
remember_me(resource)
flash.delete(:notice)
end
end
@ -49,6 +38,16 @@ class Auth::SessionsController < Devise::SessionsController
protected
def find_user
if session[:otp_user_id]
User.find(session[:otp_user_id])
else
user = User.authenticate_with_ldap(user_params) if Devise.ldap_authentication
user ||= User.authenticate_with_pam(user_params) if Devise.pam_authentication
user ||= User.find_for_authentication(email: user_params[:email])
end
end
def user_params
params.require(:user).permit(:email, :password, :otp_attempt)
end
@ -71,6 +70,10 @@ class Auth::SessionsController < Devise::SessionsController
super
end
def two_factor_enabled?
find_user&.otp_required_for_login?
end
def valid_otp_attempt?(user)
user.validate_and_consume_otp!(user_params[:otp_attempt]) ||
user.invalidate_otp_backup_code!(user_params[:otp_attempt])
@ -78,10 +81,24 @@ class Auth::SessionsController < Devise::SessionsController
false
end
def authenticate_with_two_factor
user = self.resource = find_user
if user_params[:otp_attempt].present? && session[:otp_user_id]
authenticate_with_two_factor_via_otp(user)
elsif user.present? && (user.encrypted_password.blank? || user.valid_password?(user_params[:password]))
# If encrypted_password is blank, we got the user from LDAP or PAM,
# so credentials are already valid
prompt_for_two_factor(user)
end
end
def authenticate_with_two_factor_via_otp(user)
if valid_otp_attempt?(user)
session.delete(:otp_user_id)
authenticate_and_respond(user)
remember_me(user)
sign_in(user)
else
flash.now[:alert] = I18n.t('users.invalid_otp_token')
prompt_for_two_factor(user)
@ -90,16 +107,10 @@ class Auth::SessionsController < Devise::SessionsController
def prompt_for_two_factor(user)
session[:otp_user_id] = user.id
@body_classes = 'lighter'
render :two_factor
end
def authenticate_and_respond(user)
sign_in(user)
remember_me(user)
respond_with user, location: after_sign_in_path_for(user)
end
private
def set_instance_presenter
@ -112,11 +123,9 @@ class Auth::SessionsController < Devise::SessionsController
def home_paths(resource)
paths = [about_path]
if single_user_mode? && resource.is_a?(User)
paths << short_account_path(username: resource.account)
end
paths
end

46
app/models/concerns/ldap_authenticable.rb
View File

@ -3,24 +3,50 @@
module LdapAuthenticable
extend ActiveSupport::Concern
def ldap_setup(_attributes)
self.confirmed_at = Time.now.utc
self.admin = false
self.external = true
save!
end
class_methods do
def authenticate_with_ldap(params = {})
ldap = Net::LDAP.new(ldap_options)
filter = format(Devise.ldap_search_filter, uid: Devise.ldap_uid, email: params[:email])
if (user_info = ldap.bind_as(base: Devise.ldap_base, filter: filter, password: params[:password]))
ldap_get_user(user_info.first)
end
end
def 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, agreement: true, account_attributes: { username: attributes[Devise.ldap_uid.to_sym].first })
resource.ldap_setup(attributes)
resource = new(email: attributes[:mail].first, agreement: true, account_attributes: { username: attributes[Devise.ldap_uid.to_sym].first }, admin: false, external: true, confirmed_at: Time.now.utc)
resource.save!
end
resource
end
def ldap_options
opts = {
host: Devise.ldap_host,
port: Devise.ldap_port,
base: Devise.ldap_base,
auth: {
method: :simple,
username: Devise.ldap_bind_dn,
password: Devise.ldap_password,
},
connect_timeout: 10,
}
if [:simple_tls, :start_tls].include?(Devise.ldap_method)
opts[:encryption] = {
method: Devise.ldap_method,
tls_options: OpenSSL::SSL::SSLContext::DEFAULT_PARAMS.tap { |options| options[:verify_mode] = OpenSSL::SSL::VERIFY_NONE if Devise.ldap_tls_no_verify },
}
end
opts
end
end
end

3
config/application.rb
View File

@ -13,7 +13,8 @@ require_relative '../lib/paperclip/video_transcoder'
require_relative '../lib/paperclip/type_corrector'
require_relative '../lib/mastodon/snowflake'
require_relative '../lib/mastodon/version'
require_relative '../lib/devise/ldap_authenticatable'
require_relative '../lib/devise/two_factor_ldap_authenticatable'
require_relative '../lib/devise/two_factor_pam_authenticatable'
Dotenv::Railtie.load

11
config/initializers/devise.rb
View File

@ -71,13 +71,10 @@ end
Devise.setup do |config|
config.warden do |manager|
manager.default_strategies(scope: :user).unshift :database_authenticatable
manager.default_strategies(scope: :user).unshift :ldap_authenticatable if Devise.ldap_authentication
manager.default_strategies(scope: :user).unshift :pam_authenticatable if Devise.pam_authentication
# We handle 2FA in our own sessions controller so this gets in the way
manager.default_strategies(scope: :user).delete :two_factor_backupable
manager.default_strategies(scope: :user).delete :two_factor_authenticatable
manager.default_strategies(scope: :user).unshift :two_factor_ldap_authenticatable if Devise.ldap_authentication
manager.default_strategies(scope: :user).unshift :two_factor_pam_authenticatable if Devise.pam_authentication
manager.default_strategies(scope: :user).unshift :two_factor_authenticatable
manager.default_strategies(scope: :user).unshift :two_factor_backupable
end
# The secret key used by Devise. Devise uses this key to generate

55
lib/devise/ldap_authenticatable.rb
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@ -1,55 +0,0 @@
# frozen_string_literal: true
require 'net/ldap'
require 'devise/strategies/authenticatable'
module Devise
module Strategies
class LdapAuthenticatable < Authenticatable
def authenticate!
if params[:user]
ldap = Net::LDAP.new(
host: Devise.ldap_host,
port: Devise.ldap_port,
base: Devise.ldap_base,
encryption: {
method: Devise.ldap_method,
tls_options: tls_options,
},
auth: {
method: :simple,
username: Devise.ldap_bind_dn,
password: Devise.ldap_password,
},
connect_timeout: 10
)
filter = format(Devise.ldap_search_filter, uid: Devise.ldap_uid, email: email)
if (user_info = ldap.bind_as(base: Devise.ldap_base, filter: filter, password: password))
user = User.ldap_get_user(user_info.first)
success!(user)
else
return fail(:invalid)
end
end
end
def email
params[:user][:email]
end
def password
params[:user][:password]
end
def tls_options
OpenSSL::SSL::SSLContext::DEFAULT_PARAMS.tap do |options|
options[:verify_mode] = OpenSSL::SSL::VERIFY_NONE if Devise.ldap_tls_no_verify
end
end
end
end
end
Warden::Strategies.add(:ldap_authenticatable, Devise::Strategies::LdapAuthenticatable)

32
lib/devise/two_factor_ldap_authenticatable.rb Normal file
View File

@ -0,0 +1,32 @@
# frozen_string_literal: true
require 'net/ldap'
require 'devise/strategies/base'
module Devise
module Strategies
class TwoFactorLdapAuthenticatable < Base
def valid?
valid_params? && mapping.to.respond_to?(:authenticate_with_ldap)
end
def authenticate!
resource = mapping.to.authenticate_with_ldap(params[scope])
if resource && !resource.otp_required_for_login?
success!(resource)
else
fail(:invalid)
end
end
protected
def valid_params?
params[scope] && params[scope][:password].present?
end
end
end
end
Warden::Strategies.add(:two_factor_ldap_authenticatable, Devise::Strategies::TwoFactorLdapAuthenticatable)

31
lib/devise/two_factor_pam_authenticatable.rb Normal file
View File

@ -0,0 +1,31 @@
# frozen_string_literal: true
require 'devise/strategies/base'
module Devise
module Strategies
class TwoFactorPamAuthenticatable < Base
def valid?
valid_params? && mapping.to.respond_to?(:authenticate_with_pam)
end
def authenticate!
resource = mapping.to.authenticate_with_pam(params[scope])
if resource && !resource.otp_required_for_login?
success!(resource)
else
fail(:invalid)
end
end
protected
def valid_params?
params[scope] && params[scope][:password].present?
end
end
end
end
Warden::Strategies.add(:two_factor_pam_authenticatable, Devise::Strategies::TwoFactorPamAuthenticatable)