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Add loop nodejs client test

master
arnaucube 3 years ago
parent
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      client/loop-test/README.md
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      client/loop-test/loop-test.js
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      client/loop-test/package.json

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.gitignore

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wasm_exec.js
node_modules

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README.md

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# blindsig-client-server-example
Example of usage of https://github.com/arnaucube/go-blindsecp256k1, including a server representing the 'signer', and a web representing the 'user'.
Example of usage of [go-blindsecp256k1](https://github.com/arnaucube/go-blindsecp256k1) & [blindsecp256k1-js](https://github.com/arnaucube/blindsecp256k1-js), including a server representing the 'signer', and a web representing the 'user'.
## Run
- Needs [go](https://golang.org/) installed
- Add the file `wasm_exec.js` in the `client` directory:
```
cd client
cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" .
```
- If wants to use the WASM web version:
- Add the file `wasm_exec.js` in the `client` directory:
```
cd client
cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" .
```
- Run the server:
```
go run main.go
```
- Open the browser at `127.0.0.1:3000/web`
- `/web/index.html` shows the js version
- `/web/index-wasm.html` shows the WASM version
## Loop test
Check [loop-test](https://github.com/arnaucube/blindsig-client-server-example/blob/master/client/loop-test/README.md) for more details.
## Flow
![diagram](https://raw.githubusercontent.com/arnaucube/blindsig-client-server-example/master/diagram.png "diagram")

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client/loop-test/README.md

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# Loop test
- Run the server from the repo root directory: `go run main.go`
- Install npm dependancies `npm install`
- Run the nodejs loop script: `node loop-test.js`
- This will print on the screen the number of iterations each 100 iterations
- And if there is an error verifying a signature, will print all the involved parameters

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client/loop-test/loop-test.js

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// 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);
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);
}
}
async function iteration() {
await newRequest()
await askBlindSign()
await verify()
}
async function main() {
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);
}
main()

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client/loop-test/package-lock.json

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{
"name": "loop-test",
"version": "0.0.1",
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"requires": {
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},
"blindsecp256k1": {
"version": "0.0.5",
"resolved": "https://registry.npmjs.org/blindsecp256k1/-/blindsecp256k1-0.0.5.tgz",
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"requires": {
"@ethersproject/keccak256": "5.0.7",
"bigi": "^1.4.2",
"bignumber.js": "7.0.2",
"ecurve": "1.0.0"
}
},
"ecurve": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/ecurve/-/ecurve-1.0.0.tgz",
"integrity": "sha1-Ms/Vzl9CHpNRIGoz1OPP0280ZaQ=",
"requires": {
"bigi": "^1.1.0"
}
},
"follow-redirects": {
"version": "1.13.2",
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"integrity": "sha512-6mPTgLxYm3r6Bkkg0vNM0HTjfGrOEtsfbhagQvbxDEsEkpNhw582upBaoRZylzen6krEmxXJgt9Ju6HiI4O7BA=="
},
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"integrity": "sha1-DU/9gALVMzqrr0oj7tL2N0yfKOc="
}
}
}

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client/loop-test/package.json

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{
"name": "loop-test",
"version": "0.0.1",
"description": "",
"main": "loop-test.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "arnaucube",
"license": "ISC",
"dependencies": {
"axios": "^0.21.1",
"blindsecp256k1": "0.0.5"
}
}

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