M client/loop-test/loop-test.js → client/loop-test/loop-test.js

@@ -54,7 +54,7 @@ if (!verified) {
 		errCount++;
 		printPoint("signerR", signerR);
 		printPoint("signerQ", signerQ);
-		console.log("m:", m);
+		console.log("m:", m.toString());
 		console.log("mBlinded:", mBlinded.toString());
 		console.log(`userSecretData:\n	a: ${userSecretData.a.toString()}\n	b: ${userSecretData.b.toString()}`);
 		printPoint("userSecretData.f", userSecretData.f);

A client/loop.html

@@ -0,0 +1,17 @@
+<html>
+	<head>
+		<meta charset="utf-8">
+		<title>blindsig-client-server-example</title>
+	</head>
+	<body>
+		<h3>loop-test browser version</h3>
+
+
+		<p>Open the console to see the logs (you may want to disable the 'Warnings' to avoid flooding the logs with innecessary messages)</p>
+		<button onClick="start();">start()</button>
+
+		<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
+		<script src="blindsecp256k1-browser.js"></script>
+		<script src="loop.js"></script>
+	</body>
+</html>

A client/loop.js

@@ -0,0 +1,87 @@
+// This version uses https://github.com/arnaucube/blindsecp256k1-js
+
+// const blindsecp256k1 = require('blindsecp256k1');
+// const axios = require('axios');
+
+let signerR, signerQ, m, mBlinded, userSecretData, blindedSig, sig, errCount, verified;
+
+const apiUrl = "http://127.0.0.1:3000";
+
+function printPoint(name, p) {
+	console.log(`${name}:\n	x: ${p.affineX.toString()}\n	y: ${p.affineY.toString()}`);
+}
+
+async function newRequest() {
+	try {
+		const res = await axios.get(apiUrl+'/request');
+		signerR = blindsecp256k1.Point.fromAffine(blindsecp256k1.ecparams,
+			blindsecp256k1.newBigFromString(res.data.signerR.x),
+			blindsecp256k1.newBigFromString(res.data.signerR.y));
+		signerQ = blindsecp256k1.Point.fromAffine(blindsecp256k1.ecparams,
+			blindsecp256k1.newBigFromString(res.data.signerQ.x),
+			blindsecp256k1.newBigFromString(res.data.signerQ.y));
+
+		let blindRes = blindsecp256k1.blind(m, signerR);
+		mBlinded = blindRes.mBlinded;
+		userSecretData = blindRes.userSecretData;
+	} catch (error) {
+		console.error(error);
+	}
+}
+
+async function askBlindSign() {
+	try {
+		let data = {
+			m: mBlinded.toString(),
+			r: {
+				x: signerR.affineX.toString(),
+				y: signerR.affineY.toString()
+			}
+		};
+		let res = await axios.post(apiUrl+'/blindsign', data);
+		blindedSig = blindsecp256k1.newBigFromString(res.data.sBlind);
+		sig = blindsecp256k1.unblind(
+			blindedSig,
+			userSecretData);
+	} catch (error) {
+		console.error(error);
+	}
+}
+
+async function verify() {
+	verified = blindsecp256k1.verify(m, sig, signerQ);
+	if (!verified) {
+		errCount++;
+		printPoint("signerR", signerR);
+		printPoint("signerQ", signerQ);
+		console.log("m:", m.toString());
+		console.log("mBlinded:", mBlinded.toString());
+		console.log(`userSecretData:\n	a: ${userSecretData.a.toString()}\n	b: ${userSecretData.b.toString()}`);
+		printPoint("userSecretData.f", userSecretData.f);
+		console.log("blinded sig:", blindedSig.toString());
+		console.log("sig.s:", sig.s.toString());
+		printPoint("sig.f", sig.f);
+		console.log("verify", verified);
+		alert("ERROR")
+	}
+}
+
+async function iteration() {
+	await newRequest()
+	await askBlindSign()
+	await verify()
+}
+
+async function start() {
+	errCount = 0;
+	for (let i=0; i<10000; i++) {
+		m = blindsecp256k1.newKeyPair().sk;
+
+		await iteration()
+		if (i%100 ==0) {
+			console.log("number of iterations", i);
+		}
+	}
+	console.log("errCount", errCount);
+}
+