62 lines
2.5 KiB
C#
62 lines
2.5 KiB
C#
using System;
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using System.Collections.Concurrent;
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using System.IO;
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using System.Security.Cryptography;
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using System.Text;
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namespace LightlessSync.Utils;
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public static class Crypto
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{
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//This buffersize seems to be the best sweetpoint for Linux and Windows
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private const int _bufferSize = 65536;
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#pragma warning disable SYSLIB0021 // Type or member is obsolete
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private static readonly ConcurrentDictionary<(string, ushort), string> _hashListPlayersSHA256 = new();
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private static readonly ConcurrentDictionary<string, string> _hashListSHA256 = new(StringComparer.Ordinal);
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private static readonly SHA256CryptoServiceProvider _sha256CryptoProvider = new();
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public static string GetFileHash(this string filePath)
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{
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using SHA1 sha1 = SHA1.Create();
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using FileStream stream = File.Open(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite | FileShare.Delete);
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return BitConverter.ToString(sha1.ComputeHash(stream)).Replace("-", "", StringComparison.Ordinal);
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}
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public static async Task<string> GetFileHashAsync(string filePath, CancellationToken cancellationToken = default)
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{
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var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite | FileShare.Delete, bufferSize: _bufferSize, options: FileOptions.Asynchronous);
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await using (stream.ConfigureAwait(false))
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{
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using var sha1 = SHA1.Create();
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var buffer = new byte[8192];
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int bytesRead;
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while ((bytesRead = await stream.ReadAsync(buffer, cancellationToken).ConfigureAwait(false)) > 0)
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{
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sha1.TransformBlock(buffer, 0, bytesRead, outputBuffer: null, 0);
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}
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sha1.TransformFinalBlock([], 0, 0);
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return Convert.ToHexString(sha1.Hash!);
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}
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}
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public static string GetHash256(this (string, ushort) playerToHash)
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{
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return _hashListPlayersSHA256.GetOrAdd(playerToHash, key => ComputeHashSHA256(key.Item1 + key.Item2.ToString()));
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}
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public static string GetHash256(this string stringToHash)
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{
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return _hashListSHA256.GetOrAdd(stringToHash, ComputeHashSHA256);
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}
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private static string ComputeHashSHA256(string stringToCompute)
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{
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using var sha = SHA256.Create();
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return BitConverter.ToString(sha.ComputeHash(Encoding.UTF8.GetBytes(stringToCompute))).Replace("-", "", StringComparison.Ordinal);
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}
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#pragma warning restore SYSLIB0021 // Type or member is obsolete
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} |