1 files changed, 165 insertions, 0 deletions
diff --git a/app/Core/Ldap/Client.php b/app/Core/Ldap/Client.php
new file mode 100644
index 00000000..63149ae3
--- /dev/null
+++ b/app/Core/Ldap/Client.php
@@ -0,0 +1,165 @@
+<?php
+
+namespace Kanboard\Core\Ldap;
+
+use LogicException;
+
+/**
+ * LDAP Client
+ *
+ * @package ldap
+ * @author  Frederic Guillot
+ */
+class Client
+{
+    /**
+     * LDAP resource
+     *
+     * @access protected
+     * @var resource
+     */
+    protected $ldap;
+
+    /**
+     * Establish LDAP connection
+     *
+     * @static
+     * @access public
+     * @param  string $username
+     * @param  string $password
+     * @return Client
+     */
+    public static function connect($username = null, $password = null)
+    {
+        $client = new self;
+        $client->open($client->getLdapServer());
+        $username = $username ?: $client->getLdapUsername();
+        $password = $password ?: $client->getLdapPassword();
+
+        if (empty($username) && empty($password)) {
+            $client->useAnonymousAuthentication();
+        } else {
+            $client->authenticate($username, $password);
+        }
+
+        return $client;
+    }
+
+    /**
+     * Get server connection
+     *
+     * @access public
+     * @return resource
+     */
+    public function getConnection()
+    {
+        return $this->ldap;
+    }
+
+    /**
+     * Establish server connection
+     *
+     * @access public
+     * @param  string   $server  LDAP server hostname or IP
+     * @param  integer  $port    LDAP port
+     * @param  boolean  $tls     Start TLS
+     * @param  boolean  $verify  Skip SSL certificate verification
+     * @return Client
+     */
+    public function open($server, $port = LDAP_PORT, $tls = LDAP_START_TLS, $verify = LDAP_SSL_VERIFY)
+    {
+        if (! function_exists('ldap_connect')) {
+            throw new ClientException('LDAP: The PHP LDAP extension is required');
+        }
+
+        if (! $verify) {
+            putenv('LDAPTLS_REQCERT=never');
+        }
+
+        $this->ldap = ldap_connect($server, $port);
+
+        if ($this->ldap === false) {
+            throw new ClientException('LDAP: Unable to connect to the LDAP server');
+        }
+
+        ldap_set_option($this->ldap, LDAP_OPT_PROTOCOL_VERSION, 3);
+        ldap_set_option($this->ldap, LDAP_OPT_REFERRALS, 0);
+        ldap_set_option($this->ldap, LDAP_OPT_NETWORK_TIMEOUT, 1);
+        ldap_set_option($this->ldap, LDAP_OPT_TIMELIMIT, 1);
+
+        if ($tls && ! @ldap_start_tls($this->ldap)) {
+            throw new ClientException('LDAP: Unable to start TLS');
+        }
+
+        return $this;
+    }
+
+    /**
+     * Anonymous authentication
+     *
+     * @access public
+     * @return boolean
+     */
+    public function useAnonymousAuthentication()
+    {
+        if (! @ldap_bind($this->ldap)) {
+            throw new ClientException('Unable to perform anonymous binding');
+        }
+
+        return true;
+    }
+
+    /**
+     * Authentication with username/password
+     *
+     * @access public
+     * @param  string  $bind_rdn
+     * @param  string  $bind_password
+     * @return boolean
+     */
+    public function authenticate($bind_rdn, $bind_password)
+    {
+        if (! @ldap_bind($this->ldap, $bind_rdn, $bind_password)) {
+            throw new ClientException('LDAP authentication failure for "'.$bind_rdn.'"');
+        }
+
+        return true;
+    }
+
+    /**
+     * Get LDAP server name
+     *
+     * @access public
+     * @return string
+     */
+    public function getLdapServer()
+    {
+        if (! LDAP_SERVER) {
+            throw new LogicException('LDAP server not configured, check the parameter LDAP_SERVER');
+        }
+
+        return LDAP_SERVER;
+    }
+
+    /**
+     * Get LDAP username (proxy auth)
+     *
+     * @access public
+     * @return string
+     */
+    public function getLdapUsername()
+    {
+        return LDAP_USERNAME;
+    }
+
+    /**
+     * Get LDAP password (proxy auth)
+     *
+     * @access public
+     * @return string
+     */
+    public function getLdapPassword()
+    {
+        return LDAP_PASSWORD;
+    }
+}