From 64542e699f3bd47effc0d6e9ee098ad881dad4bc Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@php.net>
Date: Fri, 24 May 2019 21:45:59 -0500
Subject: [PATCH] BigInteger: GMP engine didn't always return 1 or -1

---
 phpseclib/Math/BigInteger/Engines/GMP.php | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/phpseclib/Math/BigInteger/Engines/GMP.php b/phpseclib/Math/BigInteger/Engines/GMP.php
index 333829c1..262e55c2 100644
--- a/phpseclib/Math/BigInteger/Engines/GMP.php
+++ b/phpseclib/Math/BigInteger/Engines/GMP.php
@@ -296,7 +296,14 @@ class GMP extends Engine
      */
     public function compare(GMP $y)
     {
-        return gmp_cmp($this->value, $y->value);
+        $r = gmp_cmp($this->value, $y->value);
+        if ($r < -1) {
+            $r = -1;
+        }
+        if ($r > 1) {
+            $r = 1;
+        }
+        return $r;
     }
 
     /**