From 94cab818f30b935e61bd1a98d4c93bcfee812a55 Mon Sep 17 00:00:00 2001
From: J08nY
Date: Tue, 24 Aug 2021 16:05:01 +0200
Subject: Fix Cofactor suite.

---
 src/cz/crcs/ectester/common/ec/EC_Curve.java   |  3 +--
 src/cz/crcs/ectester/common/util/ByteUtil.java | 11 ++++++++++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/cz/crcs/ectester/common/ec/EC_Curve.java b/src/cz/crcs/ectester/common/ec/EC_Curve.java
index 357b695..d188551 100644
--- a/src/cz/crcs/ectester/common/ec/EC_Curve.java
+++ b/src/cz/crcs/ectester/common/ec/EC_Curve.java
@@ -112,8 +112,7 @@ public class EC_Curve extends EC_Params {
 
         BigInteger n = new BigInteger(1, getParam(EC_Consts.PARAMETER_R)[0]);
 
-        int h = ByteUtil.getShort(getParam(EC_Consts.PARAMETER_K)[0], 0);
-
+        int h = ByteUtil.getShortInt(getParam(EC_Consts.PARAMETER_K)[0], 0);
         return new ECParameterSpec(curve, generator, n, h);
     }
 
diff --git a/src/cz/crcs/ectester/common/util/ByteUtil.java b/src/cz/crcs/ectester/common/util/ByteUtil.java
index 4b4a2d6..442824a 100644
--- a/src/cz/crcs/ectester/common/util/ByteUtil.java
+++ b/src/cz/crcs/ectester/common/util/ByteUtil.java
@@ -9,7 +9,7 @@ package cz.crcs.ectester.common.util;
 public class ByteUtil {
 
     /**
-     * Gen a short from a byte array at <code>offset</code>, big-endian.
+     * Get a short from a byte array at <code>offset</code>, big-endian.
      *
      * @return the short value
      */
@@ -17,6 +17,15 @@ public class ByteUtil {
         return (short) (((array[offset] & 0xFF) << 8) | (array[offset + 1] & 0xFF));
     }
 
+    /**
+     * Get a short from a byte array at <code>offset</code>, return it as an int, big-endian.
+     *
+     * @return the short value (as an int)
+     */
+    public static int getShortInt(byte[] array, int offset) {
+        return (((array[offset] & 0xFF) << 8) | (array[offset + 1] & 0xFF));
+    }
+
     /**
      * Set a short in a byte array at <code>offset</code>, big-endian.
      */
-- 
cgit v1.2.3-70-g09d2