SauceControl.Blake2Fast 2.0.0

.NET Core 2.1 .NET Standard 1.1 .NET Framework 4.5
Install-Package SauceControl.Blake2Fast -Version 2.0.0
dotnet add package SauceControl.Blake2Fast --version 2.0.0
<PackageReference Include="SauceControl.Blake2Fast" Version="2.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add SauceControl.Blake2Fast --version 2.0.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: SauceControl.Blake2Fast, 2.0.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install SauceControl.Blake2Fast as a Cake Addin
#addin nuget:?package=SauceControl.Blake2Fast&version=2.0.0

// Install SauceControl.Blake2Fast as a Cake Tool
#tool nuget:?package=SauceControl.Blake2Fast&version=2.0.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

These RFC 7693-compliant BLAKE2 implementations have been tuned for high speed and low memory usage. The .NET Core builds use the new x86 SIMD Intrinsics for even greater speed. Span{byte} is used throughout for lower memory overhead compared to byte[] based APIs.

On .NET Core 2.1+, Blake2Fast includes SSE4.1 SIMD-accelerated implementations of both BLAKE2b and BLAKE2s.

On .NET Core 3+, a faster AVX2 implementation of BLAKE2b is included in addition to the SSE4.1 implementation.

Usage

All-at-Once Hashing

The simplest and lightest-weight way to calculate a hash is the all-at-once ComputeHash method.

var hash = Blake2b.ComputeHash(data);

BLAKE2 supports variable digest lengths from 1 to 32 bytes for BLAKE2s or 1 to 64 bytes for BLAKE2b.

var hash = Blake2b.ComputeHash(42, data);

BLAKE2 also natively supports keyed hashing.

var hash = Blake2b.ComputeHash(key, data);

Incremental Hashing

BLAKE2 hashes can be incrementally updated if you do not have the data available all at once.

async Task<byte[]> ComputeHashAsync(Stream data)
{
    var hasher = Blake2b.CreateIncrementalHasher();
    var buffer = ArrayPool<byte>.Shared.Rent(4096);

    int bytesRead;
    while ((bytesRead = await data.ReadAsync(buffer, 0, buffer.Length)) > 0)
        hasher.Update(new Span<byte>(buffer, 0, bytesRead));

    ArrayPool<byte>.Shared.Return(buffer);
    return hasher.Finish();
}

Allocation-Free Hashing

The output hash digest can be written to an existing buffer to avoid allocating a new array each time.

Span<byte> buffer = stackalloc byte[Blake2b.DefaultDigestLength];
Blake2b.ComputeAndWriteHash(data, buffer);

This is especially useful when performing an iterative hash, as might be used in a key derivation function.

byte[] DeriveBytes(string password, ReadOnlySpan<byte> salt)
{
    // Create key from password, then hash the salt using the key
    var pwkey = Blake2b.ComputeHash(Encoding.UTF8.GetBytes(password));
    var hbuff = Blake2b.ComputeHash(pwkey, salt);

    // Hash the hash lots of times, re-using the same buffer
    for (int i = 0; i < 999_999; i++)
        Blake2b.ComputeAndWriteHash(pwkey, hbuff, hbuff);

    return hbuff;
}

System.Security.Cryptography Interop

For interoperating with code that uses System.Security.Cryptography primitives, Blake2Fast can create a HashAlgorithm wrapper. The wrapper inherits from HMAC in case keyed hashing is required.

HashAlgorithm is less efficient than the above methods, so use it only when necessary for compatibility.

byte[] WriteDataAndCalculateHash(byte[] data, string outFile)
{
    using (var hashAlg = Blake2b.CreateHashAlgorithm())
    using (var fileStream = new FileStream(outFile, FileMode.Create))
    using (var cryptoStream = new CryptoStream(fileStream, hashAlg, CryptoStreamMode.Write))
    {
        cryptoStream.Write(data, 0, data.Length);
        cryptoStream.FlushFinalBlock();
        return hashAlg.Hash;
    }
}
Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp1.0 netcoreapp1.1 netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard1.1 netstandard1.2 netstandard1.3 netstandard1.4 netstandard1.5 netstandard1.6 netstandard2.0 netstandard2.1
.NET Framework net45 net451 net452 net46 net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen30 tizen40 tizen60
Universal Windows Platform uap uap10.0
Windows Phone wpa81
Windows Store netcore netcore45 netcore451
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (4)

Showing the top 4 NuGet packages that depend on SauceControl.Blake2Fast:

Package Downloads
CardanoSharp.Wallet

Package Description

Centr.NetCS

Third Party Library for implementing Credits Blockchain in .NET

PoseidonSharp

This is a Poseidon Hashing Library built for use with Loopring

DigitalRuby.SimpleCache

Simple and powerful caching for .NET using three layers: RAM, file and redis.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
2.0.0 50,778 6/13/2020
1.0.0 20,678 7/26/2019
0.2.0 6,734 6/18/2018
0.1.0 684 6/15/2018

See https://github.com/saucecontrol/Blake2Fast/releases for release-specific notes.