fix starttls bug

#65

Author: YuJin44

lib/ldapauth.js

@@ -87,6 +87,7 @@ function LdapAuth(opts) {
   this.opts.bindProperty || (this.opts.bindProperty = 'dn');
   this.opts.groupSearchScope || (this.opts.groupSearchScope = 'sub');
   this.opts.groupDnProperty || (this.opts.groupDnProperty = 'dn');
+  this.opts.tlsStarted = false;
 
   EventEmitter.call(this);
 
@@ -126,21 +127,7 @@ function LdapAuth(opts) {
   this._userClient.on('error', this._handleError.bind(this));
 
   var self = this;
-  if (this.opts.starttls) {
-    // When starttls is enabled, this callback supplants the 'connect' callback
-    this._adminClient.starttls(this.opts.tlsOptions, this._adminClient.controls, function (err) {
-      if (err) {
-        self._handleError(err);
-      } else {
-        self._onConnectAdmin();
-      }
-    });
-    this._userClient.starttls(this.opts.tlsOptions, this._userClient.controls, function (err) {
-      if (err) {
-        self._handleError(err);
-      }
-    });
-  } else if (opts.reconnect) {
+  if (opts.reconnect && !this.opts.starttls) {
     this.once('_installReconnectListener', function () {
       self.log && self.log.trace('install reconnect listener');
       self._adminClient.on('connect', function () {
@@ -401,6 +388,37 @@ LdapAuth.prototype._findGroups = function (user, callback) {
  */
 LdapAuth.prototype.authenticate = function (username, password, callback) {
   var self = this;
+  if (this.opts.starttls && !this.opts.tlsStarted) {
+    // When starttls is enabled, this callback supplants the 'connect' callback
+    this._adminClient.starttls(this.opts.tlsOptions, this._adminClient.controls, function (err) {
+      if (err) {
+        self._handleError(err);
+      } else {
+        self._onConnectAdmin(function(){self._handleAuthenticate(username, password, callback);});
+      }
+    });
+    this._userClient.starttls(this.opts.tlsOptions, this._userClient.controls, function (err) {
+      if (err) {
+        self._handleError(err);
+      }
+    });
+  } else {
+    self._handleAuthenticate(username, password, callback);
+  }
+};
+
+/**
+ * Authenticate given credentials against LDAP server
+ * 
+ * @private
+ * @param {string} username - The username to authenticate
+ * @param {string} password - The password to verify
+ * @param {resultCallback} callback - Result handling callback
+ * @returns {undefined}
+ */
+LdapAuth.prototype._handleAuthenticate = function (username, password, callback) {
+  this.opts.tlsStarted = true;
+  var self = this;
 
   if (typeof password === 'undefined' || password === null || password === '') {
     return callback(new Error('no password given'));