System.IO.Hashing 8.0.0

Prefix Reserved
There is a newer prerelease version of this package available.
See the version list below for details.
dotnet add package System.IO.Hashing --version 8.0.0                
NuGet\Install-Package System.IO.Hashing -Version 8.0.0                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="System.IO.Hashing" Version="8.0.0" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add System.IO.Hashing --version 8.0.0                
#r "nuget: System.IO.Hashing, 8.0.0"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install System.IO.Hashing as a Cake Addin
#addin nuget:?package=System.IO.Hashing&version=8.0.0

// Install System.IO.Hashing as a Cake Tool
#tool nuget:?package=System.IO.Hashing&version=8.0.0                


System.IO.Hashing offers a variety of hash code algorithms.

Hash code algorithms are pivotal for generating unique values for objects based on their content, facilitating object comparisons, and detecting content alterations. The namespace encompasses algorithms like CRC-32, CRC-64, xxHash3, xxHash32, xxHash64, and xxHash128, all engineered for swift and efficient hash code generation, with xxHash being an "Extremely fast hash algorithm".

Warning: The hash functions provided by System.IO.Hashing are not suitable for security purposes such as handling passwords or verifying untrusted content. For such security-critical applications, consider using cryptographic hash functions provided by the System.Security.Cryptography namespace.

Key Features

  • Variety of hash code algorithms including CRC-32, CRC-64, xxHash3, xxHash32, xxHash64, and xxHash128.
  • Implementations of CRC-32 and CRC-64 algorithms, as used in IEEE 802.3, and described in ECMA-182, Annex B respectively.
  • Implementations of XxHash32 for generating 32-bit hashes, XxHash3 and XxHash64 for generating 64-bit hashes, and xxHash128 for generating 128-bit hashes.

How to Use

Creating hash codes is straightforward. Call the Hash method with the content to be hashed.

Here is a practical example:

using System;
using System.IO.Hashing;

byte[] data = new byte[] { 1, 2, 3, 4 };

byte[] crc32Value = Crc32.Hash(data);
Console.WriteLine($"CRC-32 Hash: {BitConverter.ToString(crc32Value)}");
// CRC-32 Hash: CD-FB-3C-B6

byte[] crc64Value = Crc64.Hash(data);
Console.WriteLine($"CRC-64 Hash: {BitConverter.ToString(crc64Value)}");
// CRC-64 Hash: 58-8D-5A-D4-2A-70-1D-B2

byte[] xxHash3Value = XxHash3.Hash(data);
Console.WriteLine($"XxHash3 Hash: {BitConverter.ToString(xxHash3Value)}");
// XxHash3 Hash: 98-8B-7B-90-33-AC-46-22

byte[] xxHash32Value = XxHash32.Hash(data);
Console.WriteLine($"XxHash32 Hash: {BitConverter.ToString(xxHash32Value)}");
// XxHash32 Hash: FE-96-D1-9C

byte[] xxHash64Value = XxHash64.Hash(data);
Console.WriteLine($"XxHash64 Hash: {BitConverter.ToString(xxHash64Value)}");
// XxHash64 Hash: 54-26-20-E3-A2-A9-2E-D1

byte[] xxHash128Value = XxHash128.Hash(data);
Console.WriteLine($"XxHash128 Hash: {BitConverter.ToString(xxHash128Value)}");
// XxHash128 Hash: 49-A0-48-99-59-7A-35-67-53-76-53-A0-D9-95-5B-86

Main Types

The main types provided by this library are:

  • System.IO.Hashing.Crc32
  • System.IO.Hashing.Crc64
  • System.IO.Hashing.XxHash3
  • System.IO.Hashing.XxHash32
  • System.IO.Hashing.XxHash64
  • System.IO.Hashing.XxHash128

Additional Documentation

Cryptographic services, including secure encryption and decryption of data: System.Security.Cryptography

Feedback & Contributing

System.IO.Hashing is released as open source under the MIT license. Bug reports and contributions are welcome at the GitHub repository.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 is compatible.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net461 was computed.  net462 is compatible.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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GitHub repositories (35)

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9.0.0-preview.5.24306.7 1,439 6/11/2024
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8.0.0 4,517,376 11/14/2023
8.0.0-rc.2.23479.6 10,244 10/10/2023
8.0.0-rc.1.23419.4 4,873 9/12/2023
8.0.0-preview.7.23375.6 3,712 8/8/2023
8.0.0-preview.6.23329.7 12,402 7/11/2023
8.0.0-preview.5.23280.8 10,593 6/13/2023
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8.0.0-preview.3.23174.8 23,917 4/11/2023
8.0.0-preview.2.23128.3 1,020 3/14/2023
8.0.0-preview.1.23110.8 6,141 2/21/2023
7.0.0 15,695,858 11/7/2022
7.0.0-rc.2.22472.3 9,224 10/11/2022
7.0.0-rc.1.22426.10 1,297 9/14/2022
7.0.0-preview.7.22375.6 4,386 8/9/2022
7.0.0-preview.6.22324.4 335 7/12/2022
7.0.0-preview.5.22301.12 340 6/14/2022
7.0.0-preview.4.22229.4 487 5/10/2022
7.0.0-preview.3.22175.4 382 4/13/2022
7.0.0-preview.2.22152.2 287 3/14/2022
7.0.0-preview.1.22076.8 283 2/17/2022
6.0.2 854,770 9/13/2022
6.0.1 881,777 2/8/2022
6.0.0 131,286,274 11/8/2021
6.0.0-rc.2.21480.5 268 10/12/2021
6.0.0-rc.1.21451.13 287 9/14/2021
6.0.0-preview.7.21377.19 1,397 8/10/2021
6.0.0-preview.6.21352.12 506 7/14/2021