From cbd9b4a836d540055c17eceea02af7f9e287e2df Mon Sep 17 00:00:00 2001
From: Peter Dettman <peter.dettman@bouncycastle.org>
Date: Mon, 9 Sep 2019 20:48:46 +0700
Subject: Rewrite conditionals to avoid overflow

---
 crypto/src/crypto/Check.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'crypto/src')

diff --git a/crypto/src/crypto/Check.cs b/crypto/src/crypto/Check.cs
index 96a05c64b..aacda144f 100644
--- a/crypto/src/crypto/Check.cs
+++ b/crypto/src/crypto/Check.cs
@@ -12,13 +12,13 @@ namespace Org.BouncyCastle.Crypto
 
         internal static void DataLength(byte[] buf, int off, int len, string msg)
         {
-            if (off + len > buf.Length)
+            if (off > (buf.Length - len))
                 throw new DataLengthException(msg);
         }
 
         internal static void OutputLength(byte[] buf, int off, int len, string msg)
         {
-            if (off + len > buf.Length)
+            if (off > (buf.Length - len))
                 throw new OutputLengthException(msg);
         }
     }
-- 
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