From 6d70bb98108ab5a99b038d73d80cb8041ff1ab33 Mon Sep 17 00:00:00 2001
From: baibaratsky <andrei@baibaratsky.com>
Date: Sat, 18 Apr 2015 02:03:04 +0300
Subject: [PATCH 1/2] Bug fixed in bcpowmod

---
 Signer.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Signer.php b/Signer.php
index 2d364b6..0b16b19 100644
--- a/Signer.php
+++ b/Signer.php
@@ -62,7 +62,7 @@ public function sign($data)
         $base = pack('v', strlen($base)) . $base;
 
         // Modular exponentiation
-        $dec = bcpowmod(self::reverseToDecimal($base), $this->power, $this->modulus);
+        $dec = bcpowmod(self::reverseToDecimal($base), $this->power, $this->modulus, 0);
 
         // Convert result to hexadecimal
         $hex = self::dec2hex($dec);

From e0a3d7129fce2d4865ed1a14eaabc1f530d7283e Mon Sep 17 00:00:00 2001
From: baibaratsky <andrei@baibaratsky.com>
Date: Sun, 19 Apr 2015 12:06:57 +0300
Subject: [PATCH 2/2] Fixed the problem with BCMath causing wrong results on
 some systems

---
 Signer.php | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Signer.php b/Signer.php
index 0b16b19..3979d7b 100644
--- a/Signer.php
+++ b/Signer.php
@@ -64,7 +64,7 @@ public function sign($data)
         // Modular exponentiation
         $dec = bcpowmod(self::reverseToDecimal($base), $this->power, $this->modulus, 0);
 
-        // Convert result to hexadecimal
+        // Convert to hexadecimal
         $hex = self::dec2hex($dec);
 
         // Fill empty bytes with zeros
@@ -199,7 +199,8 @@ private static function hex2decBC($hex) {
 
         return bcadd(
                 (string)hexdec($last),
-                bcmul('16', self::hex2decBC($rest))
+                bcmul('16', self::hex2decBC($rest), 0),
+                0
         );
     }
 
@@ -228,7 +229,7 @@ private static function dec2hex($dec)
      */
     private static function dec2hexBC($dec) {
         $remainder = bcmod($dec, '16');
-        $quotient = bcdiv(bcsub($dec, $remainder), '16');
+        $quotient = bcdiv(bcsub($dec, $remainder, 0), '16', 0);
 
         if ($quotient == 0) {
             return dechex($remainder);