From 17f8aa5b019a1898e23b1bc8f1d30d518305fa05 Mon Sep 17 00:00:00 2001
From: Peter Dettman <peter.dettman@bouncycastle.org>
Date: Wed, 15 Feb 2023 13:42:05 +0700
Subject: Use spans

---
 crypto/src/crypto/modes/GCMBlockCipher.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/src/crypto/modes/GCMBlockCipher.cs b/crypto/src/crypto/modes/GCMBlockCipher.cs
index 26b590ef9..41d850b41 100644
--- a/crypto/src/crypto/modes/GCMBlockCipher.cs
+++ b/crypto/src/crypto/modes/GCMBlockCipher.cs
@@ -566,7 +566,8 @@ namespace Org.BouncyCastle.Crypto.Modes
                 if (bufOff >= BlockSize)
                 {
                     DecryptBlock(bufBlock, output);
-                    Array.Copy(bufBlock, BlockSize, bufBlock, 0, bufOff -= BlockSize);
+                    bufOff -= BlockSize;
+                    bufBlock.AsSpan(0, bufOff).CopyFrom(bufBlock.AsSpan(BlockSize));
                     resultLen = BlockSize;
 
                     available += BlockSize;
-- 
cgit 1.4.1