1.12.4

Co-authored-by: cake <cake@noreply.git.lightless-sync.org>
Co-authored-by: cake <admin@cakeandbanana.nl>
Co-authored-by: azyges <229218900+azyges@users.noreply.github.com>
Co-authored-by: choco <choco@patat.nl>
Co-authored-by: choco <choco@noreply.git.lightless-sync.org>
Co-authored-by: defnotken <itsdefnotken@gmail.com>
Reviewed-on: #73

LightlessSync/Utils/Crypto.cs

@@ -1,16 +1,15 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Security.Cryptography;
+using System.Security.Cryptography;
 using System.Text;
 
 namespace LightlessSync.Utils;
 
 public static class Crypto
 {
+    //This buffersize seems to be the best sweetpoint for Linux and Windows
+    private const int _bufferSize = 65536;
 #pragma warning disable SYSLIB0021 // Type or member is obsolete
 
-    private static readonly Dictionary<(string, ushort), string> _hashListPlayersSHA256 = new();
+    private static readonly Dictionary<(string, ushort), string> _hashListPlayersSHA256 = [];
     private static readonly Dictionary<string, string> _hashListSHA256 = new(StringComparer.Ordinal);
     private static readonly SHA256CryptoServiceProvider _sha256CryptoProvider = new();
 
@@ -21,6 +20,26 @@ public static class Crypto
         return BitConverter.ToString(sha1.ComputeHash(stream)).Replace("-", "", StringComparison.Ordinal);
     }
 
+    public static async Task<string> GetFileHashAsync(string filePath, CancellationToken cancellationToken = default)
+    {
+        var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite | FileShare.Delete, bufferSize: _bufferSize, options: FileOptions.Asynchronous);
+        await using (stream.ConfigureAwait(false))
+        {
+            using var sha1 = SHA1.Create();
+
+            var buffer = new byte[8192];
+            int bytesRead;
+            while ((bytesRead = await stream.ReadAsync(buffer, cancellationToken).ConfigureAwait(false)) > 0)
+            {
+                sha1.TransformBlock(buffer, 0, bytesRead, outputBuffer: null, 0);
+            }
+
+            sha1.TransformFinalBlock([], 0, 0);
+
+            return Convert.ToHexString(sha1.Hash!);
+        }
+    }
+
     public static string GetHash256(this (string, ushort) playerToHash)
     {
         if (_hashListPlayersSHA256.TryGetValue(playerToHash, out var hash))