How to use ecurve - 10 common examples
To help you get started, we’ve selected a few ecurve examples, based on popular ways it is used in public projects.
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bitcoinjs / bitcoinjs-lib / test / ecpubkey.js View on Github 
it('uses the secp256k1 curve by default', function () {
var secp256k1 = ecurve.getCurveByName('secp256k1')
for (var property in secp256k1) {
// FIXME: circular structures in ecurve
if (property === 'G') continue
if (property === 'infinity') continue
var actual = ECPubKey.curve[property]
var expected = secp256k1[property]
assert.deepEqual(actual, expected)
}
})it('uses the secp256k1 curve by default', function () {
var secp256k1 = ecurve.getCurveByName('secp256k1')
for (var property in secp256k1) {
// FIXME: circular structures in ecurve
if (property === 'G') continue
if (property === 'infinity') continue
var actual = ECKey.curve[property]
var expected = secp256k1[property]
assert.deepEqual(actual, expected)
}
})var crypto = require('./crypto')
var ecdsa = require('./ecdsa')
var typeForce = require('typeforce')
var networks = require('./networks')
var Address = require('./address')
var ecurve = require('ecurve')
var secp256k1 = ecurve.getCurveByName('secp256k1')
function ECPubKey (Q, compressed) {
if (compressed === undefined) {
compressed = true
}
typeForce('Point', Q)
typeForce('Boolean', compressed)
this.compressed = compressed
this.Q = Q
}
// Constants
ECPubKey.curve = secp256k1var assert = require('assert')
var base58check = require('bs58check')
var ecdsa = require('./ecdsa')
var networks = require('./networks')
var randomBytes = require('randombytes')
var typeForce = require('typeforce')
var BigInteger = require('bigi')
var ECPubKey = require('./ecpubkey')
var ecurve = require('ecurve')
var secp256k1 = ecurve.getCurveByName('secp256k1')
function ECKey (d, compressed) {
assert(d.signum() > 0, 'Private key must be greater than 0')
assert(d.compareTo(ECKey.curve.n) < 0, 'Private key must be less than the curve order')
var Q = ECKey.curve.G.multiply(d)
this.d = d
this.pub = new ECPubKey(Q, compressed)
}
// Constants
ECKey.curve = secp256k1
// Static constructors
ECKey.fromWIF = function (string) {it('(secp256k1) should generate a valid secp256k1 keypair', function(){
var keypair = crypto.deriveKeypair(node_crypto.randomBytes(32), node_crypto.randomBytes(32));
var curve = ecurve.getCurveByName('secp256k1');
expect(curve.validate(ecurve.Point.decodeFrom(curve, new Buffer(keypair.public, 'hex')))).to.be.true;
});const verifyEcdsaNonMalleability = (transaction) => {
var ecurve = require('ecurve')
var secp256k1 = ecurve.getCurveByName('secp256k1')
var n = secp256k1.n
var hash = arkjs.crypto.getHash(transaction, true, true)
var signatureBuffer = Buffer.from(transaction.signature, 'hex')
var senderPublicKeyBuffer = Buffer.from(transaction.senderPublicKey, 'hex')
var ecpair = arkjs.ECPair.fromPublicKeyBuffer(senderPublicKeyBuffer, transaction.network)
var ecsignature = arkjs.ECSignature.fromDER(signatureBuffer)
var ecs2 = arkjs.ECSignature.fromDER(signatureBuffer)
ecs2.s = n.subtract(ecs2.s)
var res = ecpair.verify(hash, ecsignature)
var res2 = ecpair.verify(hash, ecs2)
return res === true && res2 === false
}const verifyEcdsaNonMalleability = (transaction) => {
const ecurve = require('ecurve')
const secp256k1 = ecurve.getCurveByName('secp256k1')
const n = secp256k1.n
const hash = cryptoBuilder.getHash(transaction, true, true)
const signatureBuffer = Buffer.from(transaction.signature, 'hex')
const senderPublicKeyBuffer = Buffer.from(transaction.senderPublicKey, 'hex')
const ecpair = ECPair.fromPublicKeyBuffer(senderPublicKeyBuffer, transaction.network)
const ecsignature = ECSignature.fromDER(signatureBuffer)
const ecs2 = ECSignature.fromDER(signatureBuffer)
ecs2.s = n.subtract(ecs2.s)
const res = ecpair.verify(hash, ecsignature)
const res2 = ecpair.verify(hash, ecs2)
return res === true && res2 === false
}var BigInteger = require('bigi');
var ecurve = require('ecurve');
var secp256k1 = ecurve.getCurveByName('secp256k1');
BigInteger = require('bigi');
var base58 = require('bs58');
var hash = require('./hash');
var assert = require('assert');
var G = secp256k1.G
var n = secp256k1.n
class PublicKey {
/** @param {ecurve.Point} public key */
constructor(Q) { this.Q = Q; }
static fromBinary(bin) {
return PublicKey.fromBuffer(new Buffer(bin, 'binary'));
}var BigInteger = require('bigi');
var ecurve = require('ecurve');
var secp256k1 = ecurve.getCurveByName('secp256k1');
BigInteger = require('bigi');
var base58 = require('bs58');
var hash = require('./hash');
var config = require('../config');
var assert = require('assert');
var G = secp256k1.G
var n = secp256k1.n
class PublicKey {
/** @param {ecurve.Point} public key */
constructor(Q) { this.Q = Q; }
static fromBinary(bin) {
return PublicKey.fromBuffer(new Buffer(bin, 'binary'));var BigInteger = require('bigi');
var ecurve = require('ecurve');
var secp256k1 = ecurve.getCurveByName('secp256k1');
BigInteger = require('bigi');
var base58 = require('bs58');
var hash = require('./hash');
var config = require('../../../config');
var assert = require('assert');
var G = secp256k1.G
var n = secp256k1.n
class PublicKey {
/** @param {ecurve.Point} public key */
constructor(Q) { this.Q = Q; }
static fromBinary(bin) {
return PublicKey.fromBuffer(new Buffer(bin, 'binary'));
