From b3ce0459a0f7711a1e7dae63e470a451fd9009a5 Mon Sep 17 00:00:00 2001
From: Richard Webb <webby@beardmouse.co.uk>
Date: Sun, 14 Feb 2021 22:01:22 +0000
Subject: [PATCH] Implement ReadAsync in ZipAESStream, extra simple version

---
 src/ICSharpCode.SharpZipLib/Encryption/ZipAESStream.cs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/ICSharpCode.SharpZipLib/Encryption/ZipAESStream.cs b/src/ICSharpCode.SharpZipLib/Encryption/ZipAESStream.cs
index 4f649e8a9..6cecb457d 100644
--- a/src/ICSharpCode.SharpZipLib/Encryption/ZipAESStream.cs
+++ b/src/ICSharpCode.SharpZipLib/Encryption/ZipAESStream.cs
@@ -1,6 +1,8 @@
 using System;
 using System.IO;
 using System.Security.Cryptography;
+using System.Threading;
+using System.Threading.Tasks;
 using ICSharpCode.SharpZipLib.Core;
 
 namespace ICSharpCode.SharpZipLib.Encryption
@@ -90,6 +92,13 @@ public override int Read(byte[] buffer, int offset, int count)
 			return nBytes;
 		}
 
+		/// <inheritdoc/>
+		public override Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
+		{
+			var readCount = Read(buffer, offset, count);
+			return Task.FromResult(readCount);
+		}
+
 		// Read data from the underlying stream and decrypt it
 		private int ReadAndTransform(byte[] buffer, int offset, int count)
 		{