src/Files.Shared/Helpers/ChecksumHelpers.cs - main - githubmirror/Files

src/Files.Shared/Helpers/ChecksumHelpers.cs

70 строк2 KB

Kris Vandermotten

Code Quality: Improve hashes (#18213)

05 мар 2026, 18:52

05 мар 2026, 18:52b43a7c4

// Copyright (c) Files Community
// Licensed under the MIT License.

using System;
using System.IO;
using System.IO.Hashing;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Files.Shared.Helpers
{
	public static class ChecksumHelpers
	{
		public static string CalculateChecksumForPath(string path)
		{
			var buffer = Encoding.UTF8.GetBytes(path);
			Span<byte> hash = stackalloc byte[MD5.HashSizeInBytes];
			MD5.HashData(buffer, hash);

			return Convert.ToHexString(hash);
		}

		public async static Task<string> CreateCRC32(Stream stream, CancellationToken cancellationToken)
		{
			var crc32 = new Crc32();
			await crc32.AppendAsync(stream, cancellationToken);
			var hashBytes = crc32.GetCurrentHash();
			Array.Reverse(hashBytes);

			return Convert.ToHexString(hashBytes);
		}

		public async static Task<string> CreateMD5(Stream stream, CancellationToken cancellationToken)
		{
			var hashBytes = await MD5.HashDataAsync(stream, cancellationToken);

			return Convert.ToHexStringLower(hashBytes);
		}

		public async static Task<string> CreateSHA1(Stream stream, CancellationToken cancellationToken)
		{
			var hashBytes = await SHA1.HashDataAsync(stream, cancellationToken);

			return Convert.ToHexStringLower(hashBytes);
		}

		public async static Task<string> CreateSHA256(Stream stream, CancellationToken cancellationToken)
		{
			var hashBytes = await SHA256.HashDataAsync(stream, cancellationToken);

			return Convert.ToHexStringLower(hashBytes);
		}

		public async static Task<string> CreateSHA384(Stream stream, CancellationToken cancellationToken)
		{
			var hashBytes = await SHA384.HashDataAsync(stream, cancellationToken);

			return Convert.ToHexStringLower(hashBytes);
		}

		public async static Task<string> CreateSHA512(Stream stream, CancellationToken cancellationToken)
		{
			var hashBytes = await SHA512.HashDataAsync(stream, cancellationToken);

			return Convert.ToHexStringLower(hashBytes);
		}
	}
}