75 lines
2.0 KiB
JavaScript
75 lines
2.0 KiB
JavaScript
const chai = require("chai");
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const path = require("path");
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const snarkjs = require("@tornado/snarkjs");
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const compiler = require("circom");
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// const crypto = require("crypto");
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const eddsa = require("../src/eddsa.js");
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const babyJub = require("../src/babyjub.js");
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const assert = chai.assert;
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const bigInt = snarkjs.bigInt;
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function print(circuit, w, s) {
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console.log(s + ": " + w[circuit.getSignalIdx(s)]);
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}
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function buffer2bits(buff) {
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const res = [];
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for (let i=0; i<buff.length; i++) {
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for (let j=0; j<8; j++) {
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if ((buff[i]>>j)&1) {
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res.push(bigInt.one);
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} else {
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res.push(bigInt.zero);
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}
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}
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}
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return res;
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}
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describe("EdDSA test", function () {
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let circuit;
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this.timeout(100000);
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before( async () => {
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const cirDef = await compiler(path.join(__dirname, "circuits", "eddsa_test.circom"));
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circuit = new snarkjs.Circuit(cirDef);
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console.log("NConstrains EdDSA: " + circuit.nConstraints);
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});
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it("Sign a single 10 bytes from 0 to 9", async () => {
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const msg = Buffer.from("00010203040506070809", "hex");
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// const prvKey = crypto.randomBytes(32);
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const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");
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const pubKey = eddsa.prv2pub(prvKey);
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const pPubKey = babyJub.packPoint(pubKey);
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const signature = eddsa.sign(prvKey, msg);
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const pSignature = eddsa.packSignature(signature);
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const uSignature = eddsa.unpackSignature(pSignature);
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assert(eddsa.verify(msg, uSignature, pubKey));
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const msgBits = buffer2bits(msg);
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const r8Bits = buffer2bits(pSignature.slice(0, 32));
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const sBits = buffer2bits(pSignature.slice(32, 64));
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const aBits = buffer2bits(pPubKey);
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const w = circuit.calculateWitness({A: aBits, R8: r8Bits, S: sBits, msg: msgBits});
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assert(circuit.checkWitness(w));
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});
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});
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