Secp256k1.ZKP 1.0.17

.NET Standard 1.0
Install-Package Secp256k1.ZKP -Version 1.0.17
dotnet add package Secp256k1.ZKP --version 1.0.17
<PackageReference Include="Secp256k1.ZKP" Version="1.0.17" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Secp256k1.ZKP --version 1.0.17
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: Secp256k1.ZKP, 1.0.17"
#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 Secp256k1.ZKP as a Cake Addin
#addin nuget:?package=Secp256k1.ZKP&version=1.0.17

// Install Secp256k1.ZKP as a Cake Tool
#tool nuget:?package=Secp256k1.ZKP&version=1.0.17
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

libsecp256k1

Optimized C library for EC operations on curve secp256k1.

This library is a work in progress and is being used to research best practices. Use at your own risk.

Features:

  • secp256k1 ECDSA signing/verification and key generation.
  • Adding/multiplying private/public keys.
  • Serialization/parsing of private keys, public keys, signatures.
  • Constant time, constant memory access signing and pubkey generation.
  • Derandomized DSA (via RFC6979 or with a caller provided function.)
  • Very efficient implementation.

Implementation details

  • General
    • No runtime heap allocation.
    • Extensive testing infrastructure.
    • Structured to facilitate review and analysis.
    • Intended to be portable to any system with a C89 compiler and uint64_t support.
    • Expose only higher level interfaces to minimize the API surface and improve application security. ("Be difficult to use insecurely.")
  • Field operations
    • Optimized implementation of arithmetic modulo the curve's field size (2^256 - 0x1000003D1).
      • Using 5 52-bit limbs (including hand-optimized assembly for x86_64, by Diederik Huys).
      • Using 10 26-bit limbs.
    • Field inverses and square roots using a sliding window over blocks of 1s (by Peter Dettman).
  • Scalar operations
    • Optimized implementation without data-dependent branches of arithmetic modulo the curve's order.
      • Using 4 64-bit limbs (relying on __int128 support in the compiler).
      • Using 8 32-bit limbs.
  • Group operations
    • Point addition formula specifically simplified for the curve equation (y^2 = x^3 + 7).
    • Use addition between points in Jacobian and affine coordinates where possible.
    • Use a unified addition/doubling formula where necessary to avoid data-dependent branches.
    • Point/x comparison without a field inversion by comparison in the Jacobian coordinate space.
  • Point multiplication for verification (aP + bG).
    • Use wNAF notation for point multiplicands.
    • Use a much larger window for multiples of G, using precomputed multiples.
    • Use Shamir's trick to do the multiplication with the public key and the generator simultaneously.
    • Optionally (off by default) use secp256k1's efficiently-computable endomorphism to split the P multiplicand into 2 half-sized ones.
  • Point multiplication for signing
    • Use a precomputed table of multiples of powers of 16 multiplied with the generator, so general multiplication becomes a series of additions.
    • Access the table with branch-free conditional moves so memory access is uniform.
    • No data-dependent branches
    • The precomputed tables add and eventually subtract points for which no known scalar (private key) is known, preventing even an attacker with control over the private key used to control the data internally.

Build steps

libsecp256k1 is built using autotools:

$ ./autogen.sh
$ ./configure
$ make
$ ./tests
$ sudo make install  # optional
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 netstandard1.0 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 wp8 wp81 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 (2)

Showing the top 2 NuGet packages that depend on Secp256k1.ZKP:

Package Downloads
Secp256k1.ZKP.Net

This package contains platform-specific native code builds of secp256k1. Included:win-x86/libsecp256k1.dll, win-x64/libsecp256k1.dll, osx-x64/libsecp256k1.dylib and linux-x64/libsecp256k1.so

libsecp256k1Zkp.Net

This package contains platform-specific native code builds of secp256k1. Included:win-x86/libsecp256k1.dll, win-x64/libsecp256k1.dll, osx-x64/libsecp256k1.dylib and linux-x64/libsecp256k1.so

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.0.17 108 2/22/2022
1.0.16 1,114 3/17/2021
1.0.15 203 3/15/2021
1.0.14 258 2/22/2021
1.0.13 258 2/15/2021
1.0.12 723 7/20/2020
1.0.8 735 9/23/2019
1.0.7 565 6/20/2019
1.0.6 838 3/27/2019
1.0.5 430 3/27/2019
1.0.4 580 2/5/2019
1.0.3 420 2/4/2019
1.0.2 438 2/4/2019
1.0.1 430 2/4/2019
1.0.0 436 2/4/2019