58 lines
1.9 KiB
Crystal
58 lines
1.9 KiB
Crystal
# Mentorenwahl: A fullstack application for assigning mentors to students based on their whishes.
|
|
# Copyright (C) 2022 Dominic Grimm
|
|
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
require "ldap"
|
|
require "socket"
|
|
require "ldap_escape"
|
|
|
|
module Backend
|
|
# Provides LDAP utility functions
|
|
module Ldap
|
|
extend self
|
|
|
|
# Creates a new LDAP connection
|
|
def create_client : LDAP::Client
|
|
LDAP::Client.new(TCPSocket.new(Backend.config.ldap.host, Backend.config.ldap.port))
|
|
end
|
|
|
|
# Constructs a CN DN from a username
|
|
def cn(username : String) : String
|
|
"cn=#{LdapEscape.dn(username)},#{Backend.config.ldap.user_dn}"
|
|
end
|
|
|
|
# Constructs a UID DN from a username
|
|
def uid(uid : String) : String
|
|
"uid=#{LdapEscape.dn(uid)},#{Backend.config.ldap.base_user_dn}"
|
|
end
|
|
|
|
# Queries the LDAP server for a user
|
|
#
|
|
# NOTE: Returns a hash of the user's attributes
|
|
def user(dn : String) : Array(Hash(String, Array(String)))
|
|
create_client
|
|
.authenticate(Backend.config.ldap.bind_dn, Backend.config.ldap.bind_password)
|
|
.search(base: dn)
|
|
end
|
|
|
|
# Checks if credentials are valid
|
|
def authenticate?(dn : String, password : String) : Bool
|
|
!!create_client.authenticate(dn, password)
|
|
rescue LDAP::Client::AuthError
|
|
false
|
|
end
|
|
end
|
|
end
|