diff --git a/phpseclib/Net/SSH2.php b/phpseclib/Net/SSH2.php
index b393eb72..d3d340ce 100644
--- a/phpseclib/Net/SSH2.php
+++ b/phpseclib/Net/SSH2.php
@@ -2964,6 +2964,17 @@ class Net_SSH2
         return (bool) ($this->bitmap & NET_SSH2_MASK_CONNECTED);
     }
 
+    /**
+     * Have you successfully been logged in?
+     *
+     * @return bool
+     * @access public
+     */
+    function isAuthenticated()
+    {
+        return (bool) ($this->bitmap & NET_SSH2_MASK_LOGIN);
+    }
+
     /**
      * Gets Binary Packets
      *
diff --git a/tests/Functional/Net/SSH2Test.php b/tests/Functional/Net/SSH2Test.php
index c8917de5..968df276 100644
--- a/tests/Functional/Net/SSH2Test.php
+++ b/tests/Functional/Net/SSH2Test.php
@@ -32,6 +32,11 @@ class Functional_Net_SSH2Test extends PhpseclibFunctionalTestCase
             'Failed asserting that SSH2 is not connected after construction.'
         );
 
+        $this->assertFalse(
+            $ssh->isAuthenticated(),
+            'Failed asserting that SSH2 is not authenticated after construction.'
+        );
+
         $this->assertNotEmpty(
             $ssh->getServerPublicHostKey(),
             'Failed asserting that a non-empty public host key was fetched.'
@@ -53,6 +58,31 @@ class Functional_Net_SSH2Test extends PhpseclibFunctionalTestCase
     /**
      * @depends testPreLogin
      */
+    public function testBadPassword($ssh)
+    {
+        $username = $this->getEnv('SSH_USERNAME');
+        $password = $this->getEnv('SSH_PASSWORD');
+        $this->assertFalse(
+            $ssh->login($username, 'zzz' . $password),
+            'SSH2 login using password succeeded.'
+        );
+
+        $this->assertTrue(
+            $ssh->isConnected(),
+            'Failed asserting that SSH2 is connected after bad login attempt.'
+        );
+
+        $this->assertFalse(
+            $ssh->isAuthenticated(),
+            'Failed asserting that SSH2 is not authenticated after bad login attempt.'
+        );
+
+        return $ssh;
+    }
+
+    /**
+     * @depends testBadPassword
+     */
     public function testPasswordLogin($ssh)
     {
         $username = $this->getEnv('SSH_USERNAME');
@@ -62,6 +92,11 @@ class Functional_Net_SSH2Test extends PhpseclibFunctionalTestCase
             'SSH2 login using password failed.'
         );
 
+        $this->assertTrue(
+            $ssh->isAuthenticated(),
+            'Failed asserting that SSH2 is authenticated after good login attempt.'
+        );
+
         return $ssh;
     }