From a983412ea96dc920d3ee4c025bcdc29069b01735 Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@php.net>
Date: Sat, 13 May 2017 23:18:42 -0500
Subject: [PATCH] Crypt: fix OpenSSL engine on <= PHP 5.3.6

---
 phpseclib/Crypt/Blowfish.php |  3 +++
 phpseclib/Crypt/RC4.php      | 18 +++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/phpseclib/Crypt/Blowfish.php b/phpseclib/Crypt/Blowfish.php
index 5be5ce3a..17c8e7e8 100644
--- a/phpseclib/Crypt/Blowfish.php
+++ b/phpseclib/Crypt/Blowfish.php
@@ -390,6 +390,9 @@ class Crypt_Blowfish extends Crypt_Base
     function isValidEngine($engine)
     {
         if ($engine == CRYPT_ENGINE_OPENSSL) {
+            if (version_compare(PHP_VERSION, '5.3.7') < 0 && $this->key_length != 16) {
+                return false;
+            }
             if ($this->key_length < 16) {
                 return false;
             }
diff --git a/phpseclib/Crypt/RC4.php b/phpseclib/Crypt/RC4.php
index 62145548..7cec2e77 100644
--- a/phpseclib/Crypt/RC4.php
+++ b/phpseclib/Crypt/RC4.php
@@ -190,7 +190,23 @@ class Crypt_RC4 extends Crypt_Base
     function isValidEngine($engine)
     {
         if ($engine == CRYPT_ENGINE_OPENSSL) {
-            $this->cipher_name_openssl = 'rc4-40';
+            if (version_compare(PHP_VERSION, '5.3.7') >= 0) {
+                $this->cipher_name_openssl = 'rc4-40';
+            } else {
+                switch (strlen($this->key)) {
+                    case 5:
+                        $this->cipher_name_openssl = 'rc4-40';
+                        break;
+                    case 8:
+                        $this->cipher_name_openssl = 'rc4-64';
+                        break;
+                    case 16:
+                        $this->cipher_name_openssl = 'rc4';
+                        break;
+                    default:
+                        return false;
+                }
+            }
         }
 
         return parent::isValidEngine($engine);