SAIB.Blake2Fast 3.0.1

.NET 6.0 This package targets .NET 6.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.6 This package targets .NET Framework 4.6. The package is compatible with this framework or higher. 
dotnet add package SAIB.Blake2Fast --version 3.0.1
                    


                    

                
NuGet\Install-Package SAIB.Blake2Fast -Version 3.0.1
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="SAIB.Blake2Fast" Version="3.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="SAIB.Blake2Fast" Version="3.0.1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="SAIB.Blake2Fast" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add SAIB.Blake2Fast --version 3.0.1
                    


                    

                
#r "nuget: SAIB.Blake2Fast, 3.0.1"
#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. 
#:package SAIB.Blake2Fast@3.0.1
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=SAIB.Blake2Fast&version=3.0.1
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=SAIB.Blake2Fast&version=3.0.1
                    


                            Install as a Cake Tool

Blake2Fast

These RFC 7693-compliant BLAKE2 implementations have been tuned for high speed and low memory usage. Span<byte> is used throughout for lower memory overhead compared to byte[] based APIs.

On modern .NET, Blake2Fast includes SIMD-accelerated (SSE2 - AVX-512) implementations of both BLAKE2b and BLAKE2s.

Usage

One-Shot Hashing

The simplest way to calculate a hash is the one-shot 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(buffer.AsSpan(0, bytesRead));

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

For convenience, the generic Update<T>() method accepts any value type that does not contain reference fields, plus arrays and Spans of compatible types.

byte[] ComputeCompositeHash()
{
    var hasher = Blake2b.CreateIncrementalHasher();

    hasher.Update(42);
    hasher.Update(Math.Pi);
    hasher.Update("I love deadlines. I like the whooshing sound they make as they fly by.".AsSpan());

    return hasher.Finish();
}

Be aware that the value passed to Update is added to the hash state in its current memory layout, which may differ based on platform (endianness) or struct layout. Use care when calling Update with types other than byte if the computed hashes are to be used across application or machine boundaries.

For example, if you are adding a string to the hash state, you may hash the characters in memory layout as shown above, or you may use Encoding.GetBytes to ensure the string bytes are handled consistently across platforms.

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 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 was computed.  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.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-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 is compatible. 
.NET Framework net46 is compatible.  net461 was computed.  net462 was computed.  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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Version Downloads Last Updated
3.0.1 618 5/16/2025

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