From 54f0f2131bf13a8f4e968118586ef7cc82f416c5 Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@php.net>
Date: Tue, 10 Sep 2013 11:07:56 -0500
Subject: [PATCH] RSA, BigInteger: add more openssl checks

---
 phpseclib/Crypt/RSA.php       | 26 +++++++++++++++++++++++++-
 phpseclib/Math/BigInteger.php | 26 ++++++++++++++++++++++++--
 2 files changed, 49 insertions(+), 3 deletions(-)

diff --git a/phpseclib/Crypt/RSA.php b/phpseclib/Crypt/RSA.php
index 784494a2..1e990137 100644
--- a/phpseclib/Crypt/RSA.php
+++ b/phpseclib/Crypt/RSA.php
@@ -469,7 +469,31 @@ class Crypt_RSA {
         if ( !defined('CRYPT_RSA_MODE') ) {
             switch (true) {
                 case extension_loaded('openssl') && version_compare(PHP_VERSION, '4.2.0', '>=') && file_exists($this->configFile):
-                    define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_OPENSSL);
+                    // some versions of XAMPP have mismatched versions of OpenSSL which causes it not to work
+                    ob_start();
+                    phpinfo();
+                    $content = ob_get_contents();
+                    ob_end_clean();
+
+                    preg_match_all('#OpenSSL (Header|Library) Version(.*)#im', $content, $matches);
+
+                    $versions = array();
+                    if (!empty($matches[1])) {
+                       for ($i = 0; $i < count($matches[1]); $i++) {
+                          $versions[$matches[1][$i]] = trim(str_replace('=>', '', strip_tags($matches[2][$i])));
+                       }
+                    }
+
+                    switch (true) {
+                        case !isset($versions['Header']):
+                        case !isset($versions['Library']):
+                        case $versions['Header'] != $versions['Library']:
+                            define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_INTERNAL);
+                            define('MATH_BIGINTEGER_OPENSSL_DISABLE', true);
+                            break;
+                        default:
+                            define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_OPENSSL);
+                    }
                     break;
                 default:
                     define('CRYPT_RSA_MODE', CRYPT_RSA_MODE_INTERNAL);
diff --git a/phpseclib/Math/BigInteger.php b/phpseclib/Math/BigInteger.php
index 4fe15669..fea3f630 100644
--- a/phpseclib/Math/BigInteger.php
+++ b/phpseclib/Math/BigInteger.php
@@ -272,7 +272,30 @@ class Math_BigInteger {
         }
 
         if (function_exists('openssl_public_encrypt') && !defined('MATH_BIGINTEGER_OPENSSL_DISABLE') && !defined('MATH_BIGINTEGER_OPENSSL_ENABLED')) {
-            define('MATH_BIGINTEGER_OPENSSL_ENABLED', true);
+            // some versions of XAMPP have mismatched versions of OpenSSL which causes it not to work
+            ob_start();
+            phpinfo();
+            $content = ob_get_contents();
+            ob_end_clean();
+
+            preg_match_all('#OpenSSL (Header|Library) Version(.*)#im', $content, $matches);
+
+            $versions = array();
+            if (!empty($matches[1])) {
+                for ($i = 0; $i < count($matches[1]); $i++) {
+                    $versions[$matches[1][$i]] = trim(str_replace('=>', '', strip_tags($matches[2][$i])));
+                }
+            }
+
+            switch (true) {
+                case !isset($versions['Header']):
+                case !isset($versions['Library']):
+                case $versions['Header'] != $versions['Library']:
+                    define('MATH_BIGINTEGER_OPENSSL_DISABLE', true);
+                    break;
+                default:
+                    define('MATH_BIGINTEGER_OPENSSL_ENABLED', true);
+            }
         }
 
         if (!defined('PHP_INT_SIZE')) {
@@ -438,7 +461,6 @@ class Math_BigInteger {
                         }
 
                         $x = str_pad($x, strlen($x) + ((MATH_BIGINTEGER_MAX10_LEN - 1) * strlen($x)) % MATH_BIGINTEGER_MAX10_LEN, 0, STR_PAD_LEFT);
-
                         while (strlen($x)) {
                             $temp = $temp->multiply($multiplier);
                             $temp = $temp->add(new Math_BigInteger($this->_int2bytes(substr($x, 0, MATH_BIGINTEGER_MAX10_LEN)), 256));