The cryptography.ecdsa.secp256k1's intro from sutulabs

cryptography.ecdsa.secp256k1's Introduction

ChainEngine.Cryptography.EcDsa.Secp256k1

This library compiles transaction signing and verifying algorithm secp256k1 and SHA256 which is used in several blockchains like Bitcoin, EOS and Graphene-based Steem, Golos, BitShares and of course in blockchain database UChainDb.

For verifying part, utilized MIT code from AntShares.
For signing part, utilizing Cryptography.ECDSA for far better performance.

Usage

using UChainDB.BingChain.Engine.Cryptography;

var signAlgo = new Secp256k1();
var pubKey = signAlgo.GetPublicKey(privKey);
var data = Encoding.UTF8.GetBytes(message);

// signing
var sig = signAlgo.Sign(privKey, data);

// verifying
var result = signAlgo.Verify(pubKey, sig, data);

Installation

Install-Package UChainDB.ChainEngine.Cryptography.EcDsa.Secp256k1

API

public byte[] GetPublicKey(byte[] privateKey)
public byte[] Sign(byte[] privateKey, byte[] data)
public byte[] Sign(byte[] privateKey, IEnumerable<byte[]> data)
public bool Verify(byte[] publicKey, byte[] sig, byte[] data)
public bool Verify(byte[] publicKey, byte[] sig, IEnumerable<byte[]> data)
public byte[] GetSharedKey(byte[] privKey, byte[] pubKeyFromOther)