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const chai = require("chai");
const path = require("path");
const tester = require("circom").tester;
const bigInt = require("big-integer");
const eddsa = require("../src/eddsa.js");
const assert = chai.assert;
describe("EdDSA MiMC test", function () {
let circuit;
this.timeout(100000);
before( async () => {
circuit = await tester(path.join(__dirname, "circuits", "eddsamimc_test.circom"));
});
it("Sign a single number", async () => {
const msg = bigInt(1234);
const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");
const pubKey = eddsa.prv2pub(prvKey);
const signature = eddsa.signMiMC(prvKey, msg);
assert(eddsa.verifyMiMC(msg, signature, pubKey));
const w = await circuit.calculateWitness({
enabled: 1,
Ax: pubKey[0],
Ay: pubKey[1],
R8x: signature.R8[0],
R8y: signature.R8[1],
S: signature.S,
M: msg});
await circuit.checkConstraints(w);
});
it("Detect Invalid signature", async () => {
const msg = bigInt(1234);
const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");
const pubKey = eddsa.prv2pub(prvKey);
const signature = eddsa.signMiMC(prvKey, msg);
assert(eddsa.verifyMiMC(msg, signature, pubKey));
try {
const w = await circuit.calculateWitness({
enabled: 1,
Ax: pubKey[0],
Ay: pubKey[1],
R8x: signature.R8[0].add(bigInt(1)),
R8y: signature.R8[1],
S: signature.S,
M: msg});
assert(false);
} catch(err) {
assert(/Constraint\sdoesn't\smatch(.*)1\s!=\s0/.test(err.message) );
}
});
it("Test a dissabled circuit with a bad signature", async () => {
const msg = bigInt(1234);
const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");
const pubKey = eddsa.prv2pub(prvKey);
const signature = eddsa.signMiMC(prvKey, msg);
assert(eddsa.verifyMiMC(msg, signature, pubKey));
const w = await circuit.calculateWitness({
enabled: 0,
Ax: pubKey[0],
Ay: pubKey[1],
R8x: signature.R8[0].add(bigInt(1)),
R8y: signature.R8[1],
S: signature.S,
M: msg});
await circuit.checkConstraints(w);
});
});