mirror of
https://github.com/arnaucube/blindsecp256k1-js.git
synced 2026-02-06 19:06:42 +01:00
Adding support for Typescript
This commit is contained in:
Jør∂¡
1
.gitignore
vendored
1
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vendored
@@ -1,2 +1,3 @@
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node_modules
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blindsecp256k1-browser.js
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dist
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3735
package-lock.json
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3735
package-lock.json
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Load Diff
30
package.json
30
package.json
@@ -2,21 +2,35 @@
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"name": "blindsecp256k1",
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"version": "0.0.1",
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"description": "Blind signatures over secp256k1, compatible with https://github.com/arnaucube/go-blindsecp256k1",
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"main": "src/index.js",
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"main": "dist/index",
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"types": "dist/index",
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"scripts": {
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"browserify": "browserify src/index.js --standalone blindsecp256k1 > blindsecp256k1-browser.js",
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"test": "mocha"
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"prepublishOnly": "npm run build",
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"clean": "rimraf dist",
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"build": "npm run clean && ./node_modules/.bin/tsc",
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"watch": "./node_modules/.bin/tsc -w -p .",
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"ts-node": "./node_modules/.bin/ts-node",
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"test": "npm run build && ./node_modules/.bin/mocha -r ts-node/register test/**/*.ts"
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},
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"author": "arnaucube",
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"license": "GPL-3.0",
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"dependencies": {
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"bigi": "^1.1.0",
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"@ethersproject/keccak256": "5.0.7",
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"bigi": "^1.4.2",
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"bignumber.js": "7.0.2",
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"ecurve": "1.0.0",
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"@ethersproject/keccak256": "5.0.7"
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"ecurve": "1.0.0"
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},
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"devDependencies": {
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"browserify": "^16.5.0",
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"mocha": "^5.2.0"
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"@types/bigi": "^1.4.2",
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"@types/chai": "^4.2.14",
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"@types/ecurve": "^1.0.0",
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"@types/mocha": "^8.2.0",
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"@types/node": "^14.14.25",
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"chai": "^4.2.0",
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"mocha": "^8.2.1",
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"rimraf": "^3.0.2",
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"ts-node": "^9.1.1",
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"tslint": "^6.1.3",
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"typescript": "^4.1.3"
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}
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}
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109
src/index.js
109
src/index.js
@@ -1,109 +0,0 @@
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var crypto = require('crypto');
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var BigInteger = require('bigi')
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var ecurve = require('ecurve')
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const {keccak256} = require("@ethersproject/keccak256");
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const ecparams = ecurve.getCurveByName('secp256k1');
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const G = ecparams.G;
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const n = ecparams.n;
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function newBigFromString(s) {
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var a = new BigInteger()
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a.fromString(s)
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return a;
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}
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function random(bytes){
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do {
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var k = BigInteger.fromByteArrayUnsigned(crypto.randomBytes(bytes));
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} while (k.toString() == "0" && k.gcd(n).toString() != "1")
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return k;
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}
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function newKeyPair() {
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const sk = random(32);
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return {sk: sk, pk: G.multiply(sk)};
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}
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function newRequestParameters() {
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const k = random(32);
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return {k: k, signerR: G.multiply(k)};
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}
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/**
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* Blinds the message for the signer R.
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* @param {BigInteger} m
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* @param {Point} signerR
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* @returns {struct} {mBlinded: BigInteger, userSecretData: {a: BigInteger, b: BigInteger, f: Point}}
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*/
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function blind(m, signerR) {
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let u = {a: BigInteger.ZERO, b: BigInteger.ZERO, f: G};
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u.a = random(32);
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u.b = random(32);
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const aR = signerR.multiply(u.a);
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const bG = G.multiply(u.b);
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u.f = aR.add(bG);
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const rx = u.f.affineX.mod(n);
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const ainv = u.a.modInverse(n);
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const ainvrx = ainv.multiply(rx);
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const mHex = m.toString(16);
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const hHex = keccak256('0x' + mHex);
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const h = BigInteger.fromHex(hHex.slice(2));
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const mBlinded = ainvrx.multiply(h);
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return {mBlinded: mBlinded.mod(n), userSecretData: u};
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}
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function blindSign(sk, mBlinded, k) {
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let sBlind = sk.multiply(mBlinded);
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sBlind = sBlind.add(k);
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return sBlind.mod(n);
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}
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/**
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* Unblinds the blinded signature.
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* @param {BigInteger} sBlind - blinded signature
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* @param {a: BigInteger, b: BigInteger, f: Point} - userSecretData
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* @returns {s: BigInteger, f: Point} - unblinded signature
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*/
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function unblind(sBlind, userSecretData) {
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const s = userSecretData.a.multiply(sBlind).add(userSecretData.b);
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return {s: s.mod(n), f: userSecretData.f};
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}
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function verify(m, s, q) {
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const sG = G.multiply(s.s);
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const mHex = m.toString(16);
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const hHex = keccak256('0x' + mHex);
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const h = BigInteger.fromHex(hHex.slice(2));
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const rx = s.f.affineX.mod(n);
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const right = s.f.add(
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q.multiply(
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rx.multiply(h)
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)
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);
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if ((sG.affineX.toString() == right.affineX.toString())
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&& (sG.affineY.toString() == right.affineY.toString())) {
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return true;
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}
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return false;
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}
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module.exports = {
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newBigFromString: newBigFromString,
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ecparams: ecparams,
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newKeyPair: newKeyPair,
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newRequestParameters: newRequestParameters,
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blind: blind,
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blindSign: blindSign,
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unblind: unblind,
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verify: verify
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}
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103
src/index.ts
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103
src/index.ts
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@@ -0,0 +1,103 @@
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import { randomBytes } from 'crypto'
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import * as BigInteger from 'bigi'
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import { getCurveByName, Point } from 'ecurve'
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import { keccak256 } from "@ethersproject/keccak256"
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const ecparams = getCurveByName('secp256k1')
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const G = ecparams.G
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const n = ecparams.n as BigInteger
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export { ecparams }
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export type UserSecretData = { a: BigInteger, b: BigInteger, f: Point }
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export type UnblindedSignature = { s: BigInteger, f: Point }
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export function newBigFromString(s: string) {
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let a = new BigInteger(null, null, null)
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a.fromString(s, null)
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return a
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}
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function random(bytes: number) {
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let k: BigInteger
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do {
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k = BigInteger.fromByteArrayUnsigned(randomBytes(bytes)) as unknown as BigInteger
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} while (k.toString() == "0" && k.gcd(n).toString() != "1")
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return k
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}
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export function newKeyPair() {
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const sk = random(32)
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return { sk: sk, pk: G.multiply(sk) }
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}
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export function newRequestParameters() {
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const k = random(32)
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return { k: k, signerR: G.multiply(k) }
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}
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/**
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* Blinds the message for the signer R.
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* @param {BigInteger} m
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* @param {Point} signerR
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* @returns {struct} {mBlinded: BigInteger, userSecretData: {a: BigInteger, b: BigInteger, f: Point}}
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*/
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export function blind(m: BigInteger, signerR: Point): { mBlinded: BigInteger, userSecretData: UserSecretData } {
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const u: UserSecretData = { a: BigInteger.ZERO as BigInteger, b: BigInteger.ZERO as BigInteger, f: G }
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u.a = random(32)
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u.b = random(32)
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const aR = signerR.multiply(u.a)
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const bG = G.multiply(u.b)
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u.f = aR.add(bG)
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const rx = u.f.affineX.mod(n)
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const ainv = u.a.modInverse(n as unknown as number)
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const ainvrx = ainv.multiply(rx)
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const mHex = m.toString(16)
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const hHex = keccak256('0x' + mHex)
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const h = BigInteger.fromHex(hHex.slice(2))
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const mBlinded = ainvrx.multiply(h)
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return { mBlinded: mBlinded.mod(n), userSecretData: u }
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}
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export function blindSign(sk: BigInteger, mBlinded: BigInteger, k: BigInteger): BigInteger {
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let sBlind = sk.multiply(mBlinded)
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sBlind = sBlind.add(k)
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return sBlind.mod(n)
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}
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/**
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* Unblinds the blinded signature.
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* @param blinded signature
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* @param userSecretData
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* @returns unblinded signature
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*/
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export function unblind(sBlind: BigInteger, userSecretData: UserSecretData): UnblindedSignature {
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const s = userSecretData.a.multiply(sBlind).add(userSecretData.b)
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return { s: s.mod(n), f: userSecretData.f }
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}
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export function verify(m: BigInteger, s: UnblindedSignature, q: Point) {
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const sG = G.multiply(s.s)
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const mHex = m.toString(16)
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const hHex = keccak256('0x' + mHex)
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const h = BigInteger.fromHex(hHex.slice(2))
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const rx = s.f.affineX.mod(n)
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const right = s.f.add(
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q.multiply(
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rx.multiply(h)
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)
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)
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if ((sG.affineX.toString() == right.affineX.toString())
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&& (sG.affineY.toString() == right.affineY.toString())) {
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return true
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}
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return false
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}
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@@ -1,39 +0,0 @@
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const assert = require('assert');
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const BigInteger = require('bigi');
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var {Point} = require('ecurve')
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const {keccak256} = require("@ethersproject/keccak256");
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const {newBigFromString, ecparams, newKeyPair, newRequestParameters, blind, blindSign, unblind, verify} = require("../src/index.js");
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describe("keccak256", function () {
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it("keccak256", async () => {
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const m = BigInteger.fromBuffer(Buffer.from("test", 'utf8'));
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const mHex = m.toString(16);
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const hHex = keccak256('0x' + mHex);
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assert.equal('0x9c22ff5f21f0b81b113e63f7db6da94fedef11b2119b4088b89664fb9a3cb658', hHex);
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const h = BigInteger.fromHex(hHex.slice(2));
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assert.equal('70622639689279718371527342103894932928233838121221666359043189029713682937432', h.toString());
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});
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});
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describe("test blind", function () {
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it("blind", async () => {
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const {sk, pk} = newKeyPair();
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const {k, signerR} = newRequestParameters();
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const msg = BigInteger.fromBuffer(
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Buffer.from("test", 'utf8')
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);
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assert.equal('1952805748', msg.toString());
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const {mBlinded, userSecretData} = blind(msg, signerR);
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const sBlind = blindSign(sk, mBlinded, k);
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const sig = unblind(sBlind, userSecretData);
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const verified = verify(msg, sig, pk);
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assert.equal(true, verified);
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});
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});
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39
test/index.test.ts
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39
test/index.test.ts
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import * as assert from 'assert'
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import * as BigInteger from 'bigi'
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// import { Point } from 'ecurve'
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import { keccak256 } from "@ethersproject/keccak256"
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import { newBigFromString, ecparams, newKeyPair, newRequestParameters, blind, blindSign, unblind, verify } from "../src/index"
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describe("keccak256", function () {
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it("keccak256", async () => {
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const m = BigInteger.fromBuffer(Buffer.from("test", 'utf8'))
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const mHex = m.toString(16)
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const hHex = keccak256('0x' + mHex)
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assert.strictEqual('0x9c22ff5f21f0b81b113e63f7db6da94fedef11b2119b4088b89664fb9a3cb658', hHex)
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const h = BigInteger.fromHex(hHex.slice(2))
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assert.strictEqual('70622639689279718371527342103894932928233838121221666359043189029713682937432', h.toString())
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})
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})
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describe("test blind", function () {
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it("should blind", async () => {
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const { sk, pk } = newKeyPair()
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const { k, signerR } = newRequestParameters()
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const msg = BigInteger.fromBuffer(
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Buffer.from("test", 'utf8')
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)
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assert.strictEqual('1952805748', msg.toString())
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const { mBlinded, userSecretData } = blind(msg, signerR)
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const sBlind = blindSign(sk, mBlinded, k)
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const sig = unblind(sBlind, userSecretData)
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const verified = verify(msg, sig, pk)
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assert(verified)
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})
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})
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19
tsconfig.json
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19
tsconfig.json
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{
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"compilerOptions": {
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"module": "commonjs",
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"moduleResolution": "node",
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"resolveJsonModule": true,
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"pretty": true,
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"declaration": true,
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"sourceMap": true,
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"target": "es2017",
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"outDir": "dist",
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"baseUrl": "src"
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},
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"include": [
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"src/**/*.ts"
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],
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"exclude": [
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"node_modules"
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]
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}
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24
tslint.json
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24
tslint.json
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@@ -0,0 +1,24 @@
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{
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"defaultSeverity": "error",
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"extends": [
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"tslint:recommended"
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],
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"jsRules": {},
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"rules": {
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"indent": [
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true,
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"spaces",
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4
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],
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"semicolon": [
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false,
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"always"
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]
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},
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"rulesDirectory": [],
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"linterOptions": {
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"exclude": [
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"node_modules/**"
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]
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}
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}
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Block a user