From a067868b732984b0f958b62f7360dc2eca06f783 Mon Sep 17 00:00:00 2001
From: Andrew Nacin <wp@andrewnacin.com>
Date: Thu, 20 Nov 2014 16:06:14 +0000
Subject: [PATCH] Prevent high resource usage when hashing large passwords.
 props mdawaffe, pento

Merges [30466] to the 3.9 branch.

Built from https://develop.svn.wordpress.org/branches/3.9@30468


git-svn-id: http://core.svn.wordpress.org/branches/3.9@30459 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/class-phpass.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/wp-includes/class-phpass.php b/wp-includes/class-phpass.php
index 1970ae9da4..f2dadae3ff 100644
--- a/wp-includes/class-phpass.php
+++ b/wp-includes/class-phpass.php
@@ -214,6 +214,10 @@ class PasswordHash {
 
 	function HashPassword($password)
 	{
+		if ( strlen( $password ) > 4096 ) {
+			return '*';
+		}
+
 		$random = '';
 
 		if (CRYPT_BLOWFISH == 1 && !$this->portable_hashes) {
@@ -249,6 +253,10 @@ class PasswordHash {
 
 	function CheckPassword($password, $stored_hash)
 	{
+		if ( strlen( $password ) > 4096 ) {
+			return false;
+		}
+
 		$hash = $this->crypt_private($password, $stored_hash);
 		if ($hash[0] == '*')
 			$hash = crypt($password, $stored_hash);