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+12 -6README.md
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+8 -0client/loop-test/README.md
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+87 -0client/loop-test/loop-test.js
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+77 -0client/loop-test/package-lock.json
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+15 -0client/loop-test/package.json
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wasm_exec.js |
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node_modules |
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# blindsig-client-server-example |
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Example of usage of https://github.com/arnaucube/go-blindsecp256k1, including a server representing the 'signer', and a web representing the 'user'. |
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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'. |
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## Run |
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- Needs [go](https://golang.org/) installed |
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- Add the file `wasm_exec.js` in the `client` directory: |
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``` |
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cd client |
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cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" . |
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``` |
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- If wants to use the WASM web version: |
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- Add the file `wasm_exec.js` in the `client` directory: |
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``` |
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cd client |
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cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" . |
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``` |
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- Run the server: |
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``` |
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go run main.go |
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``` |
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- Open the browser at `127.0.0.1:3000/web` |
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- `/web/index.html` shows the js version |
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- `/web/index-wasm.html` shows the WASM version |
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|
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## Loop test |
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Check [loop-test](https://github.com/arnaucube/blindsig-client-server-example/blob/master/client/loop-test/README.md) for more details. |
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## Flow |
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 |
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# Loop test |
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- Run the server from the repo root directory: `go run main.go` |
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- Install npm dependancies `npm install` |
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- Run the nodejs loop script: `node loop-test.js` |
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- This will print on the screen the number of iterations each 100 iterations |
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- And if there is an error verifying a signature, will print all the involved parameters |
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// This version uses https://github.com/arnaucube/blindsecp256k1-js
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const blindsecp256k1 = require('blindsecp256k1'); |
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const axios = require('axios'); |
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let signerR, signerQ, m, mBlinded, userSecretData, blindedSig, sig, errCount, verified; |
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const apiUrl = "http://127.0.0.1:3000"; |
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function printPoint(name, p) { |
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console.log(`${name}:\n x: ${p.affineX.toString()}\n y: ${p.affineY.toString()}`); |
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} |
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async function newRequest() { |
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try { |
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const res = await axios.get(apiUrl+'/request'); |
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signerR = blindsecp256k1.Point.fromAffine(blindsecp256k1.ecparams, |
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blindsecp256k1.newBigFromString(res.data.signerR.x), |
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blindsecp256k1.newBigFromString(res.data.signerR.y)); |
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signerQ = blindsecp256k1.Point.fromAffine(blindsecp256k1.ecparams, |
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blindsecp256k1.newBigFromString(res.data.signerQ.x), |
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blindsecp256k1.newBigFromString(res.data.signerQ.y)); |
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let blindRes = blindsecp256k1.blind(m, signerR); |
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mBlinded = blindRes.mBlinded; |
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userSecretData = blindRes.userSecretData; |
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} catch (error) { |
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console.error(error); |
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} |
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} |
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async function askBlindSign() { |
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try { |
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let data = { |
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m: mBlinded.toString(), |
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r: { |
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x: signerR.affineX.toString(), |
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y: signerR.affineY.toString() |
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} |
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}; |
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let res = await axios.post(apiUrl+'/blindsign', data); |
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blindedSig = blindsecp256k1.newBigFromString(res.data.sBlind); |
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sig = blindsecp256k1.unblind( |
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blindedSig, |
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userSecretData); |
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} catch (error) { |
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console.error(error); |
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} |
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} |
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async function verify() { |
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verified = blindsecp256k1.verify(m, sig, signerQ); |
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if (!verified) { |
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errCount++; |
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printPoint("signerR", signerR); |
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printPoint("signerQ", signerQ); |
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console.log("m:", m); |
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console.log("mBlinded:", mBlinded.toString()); |
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console.log(`userSecretData:\n a: ${userSecretData.a.toString()}\n b: ${userSecretData.b.toString()}`); |
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printPoint("userSecretData.f", userSecretData.f); |
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console.log("blinded sig:", blindedSig.toString()); |
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console.log("sig.s:", sig.s.toString()); |
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printPoint("sig.f", sig.f); |
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console.log("verify", verified); |
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} |
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} |
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async function iteration() { |
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await newRequest() |
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await askBlindSign() |
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await verify() |
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} |
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async function main() { |
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errCount = 0; |
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for (let i=0; i<10000; i++) { |
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m = blindsecp256k1.newKeyPair().sk; |
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await iteration() |
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if (i%100 ==0) { |
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console.log("number of iterations", i); |
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} |
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} |
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console.log("errCount", errCount); |
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} |
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main() |
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{ |
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"name": "loop-test", |
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"version": "0.0.1", |
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"lockfileVersion": 1, |
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"requires": true, |
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"dependencies": { |
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"@ethersproject/bytes": { |
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"version": "5.0.10", |
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"resolved": "https://registry.npmjs.org/@ethersproject/bytes/-/bytes-5.0.10.tgz", |
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"integrity": "sha512-vpu0v1LZ1j1s9kERQIMnVU69MyHEzUff7nqK9XuCU4vx+AM8n9lU2gj7jtJIvGSt9HzatK/6I6bWusI5nyuaTA==", |
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"requires": { |
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"@ethersproject/logger": "^5.0.8" |
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} |
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}, |
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"@ethersproject/keccak256": { |
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"version": "5.0.7", |
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"resolved": "https://registry.npmjs.org/@ethersproject/keccak256/-/keccak256-5.0.7.tgz", |
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"integrity": "sha512-zpUBmofWvx9PGfc7IICobgFQSgNmTOGTGLUxSYqZzY/T+b4y/2o5eqf/GGmD7qnTGzKQ42YlLNo+LeDP2qe55g==", |
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"requires": { |
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"@ethersproject/bytes": "^5.0.9", |
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"js-sha3": "0.5.7" |
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} |
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}, |
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"@ethersproject/logger": { |
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"version": "5.0.9", |
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"resolved": "https://registry.npmjs.org/@ethersproject/logger/-/logger-5.0.9.tgz", |
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"integrity": "sha512-kV3Uamv3XOH99Xf3kpIG3ZkS7mBNYcLDM00JSDtNgNB4BihuyxpQzIZPRIDmRi+95Z/R1Bb0X2kUNHa/kJoVrw==" |
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}, |
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"axios": { |
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"version": "0.21.1", |
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"resolved": "https://registry.npmjs.org/axios/-/axios-0.21.1.tgz", |
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"integrity": "sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==", |
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"requires": { |
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"follow-redirects": "^1.10.0" |
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} |
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}, |
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"bigi": { |
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"version": "1.4.2", |
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"resolved": "https://registry.npmjs.org/bigi/-/bigi-1.4.2.tgz", |
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"integrity": "sha1-nGZalfiLiwj8Bc/XMfVhhZ1yWCU=" |
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}, |
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"bignumber.js": { |
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"version": "7.0.2", |
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"resolved": "https://registry.npmjs.org/bignumber.js/-/bignumber.js-7.0.2.tgz", |
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"integrity": "sha512-TosM7Yg1Ux0ZCNwwS/tW95r3q9xIZstgsUGKWaez0Cgq8Oy3qia9RGvyG/fbxlQAvigjza1d057QNQLGvYXCeg==" |
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}, |
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"blindsecp256k1": { |
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"version": "0.0.5", |
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"resolved": "https://registry.npmjs.org/blindsecp256k1/-/blindsecp256k1-0.0.5.tgz", |
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"integrity": "sha512-P+ahL3AlZY2RvtEUH7W3yidTNfDsu7yUsb2OOorEzsSE0cBovQKyBi+d883CVwbgjcW4mFFmHYgBZ0q+QOz9zQ==", |
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"requires": { |
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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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} |
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}, |
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"ecurve": { |
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"version": "1.0.0", |
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"resolved": "https://registry.npmjs.org/ecurve/-/ecurve-1.0.0.tgz", |
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"integrity": "sha1-Ms/Vzl9CHpNRIGoz1OPP0280ZaQ=", |
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"requires": { |
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"bigi": "^1.1.0" |
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} |
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}, |
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"follow-redirects": { |
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"version": "1.13.2", |
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"resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.13.2.tgz", |
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"integrity": "sha512-6mPTgLxYm3r6Bkkg0vNM0HTjfGrOEtsfbhagQvbxDEsEkpNhw582upBaoRZylzen6krEmxXJgt9Ju6HiI4O7BA==" |
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}, |
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"js-sha3": { |
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"version": "0.5.7", |
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"resolved": "https://registry.npmjs.org/js-sha3/-/js-sha3-0.5.7.tgz", |
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"integrity": "sha1-DU/9gALVMzqrr0oj7tL2N0yfKOc=" |
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} |
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} |
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} |
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{ |
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"name": "loop-test", |
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"version": "0.0.1", |
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"description": "", |
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"main": "loop-test.js", |
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"scripts": { |
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"test": "echo \"Error: no test specified\" && exit 1" |
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}, |
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"author": "arnaucube", |
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"license": "ISC", |
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"dependencies": { |
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"axios": "^0.21.1", |
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"blindsecp256k1": "0.0.5" |
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} |
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} |
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