From 05539a72befc2e50f8b0437b69dee64b46b97aa8 Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@gmail.com>
Date: Wed, 7 Jul 2021 22:30:43 -0500
Subject: [PATCH] PrimeField: plug memory leaks

---
 phpseclib/Math/PrimeField.php         | 8 ++++++++
 phpseclib/Math/PrimeField/Integer.php | 9 +++++++++
 2 files changed, 17 insertions(+)

diff --git a/phpseclib/Math/PrimeField.php b/phpseclib/Math/PrimeField.php
index 6b85c724..7e15f906 100644
--- a/phpseclib/Math/PrimeField.php
+++ b/phpseclib/Math/PrimeField.php
@@ -111,4 +111,12 @@ class PrimeField extends FiniteField
     {
         return Integer::getModulo($this->instanceID)->getLength();
     }
+
+    /**
+     *  Destructor
+     */
+    public function __destruct()
+    {
+        Integer::cleanupCache($this->instanceID);
+    }
 }
\ No newline at end of file
diff --git a/phpseclib/Math/PrimeField/Integer.php b/phpseclib/Math/PrimeField/Integer.php
index c274ff64..c933f5c1 100644
--- a/phpseclib/Math/PrimeField/Integer.php
+++ b/phpseclib/Math/PrimeField/Integer.php
@@ -95,6 +95,15 @@ class Integer extends Base
         }
     }
 
+    /**
+     * Delete the modulo for a given instance
+     */
+    public static function cleanupCache($instanceID)
+    {
+        unset(static::$modulo[$instanceID]);
+        unset(static::$reduce[$instanceID]);
+    }
+
     /**
      * Returns the modulo
      *