1const chai = require("chai");
 2const path = require("path");
 3const snarkjs = require("snarkjs");
 4const compiler = require("circom");
 5
 6const eddsa = require("../src/eddsa.js");
 7const babyJub = require("../src/babyjub.js");
 8
 9const assert = chai.assert;
10
11const bigInt = snarkjs.bigInt;
12
13function print(circuit, w, s) {
14    console.log(s + ": " + w[circuit.getSignalIdx(s)]);
15}
16
17function buffer2bits(buff) {
18    const res = [];
19    for (let i=0; i<buff.length; i++) {
20        for (let j=0; j<8; j++) {
21            if ((buff[i]>>j)&1) {
22                res.push(bigInt.one);
23            } else {
24                res.push(bigInt.zero);
25            }
26        }
27    }
28    return res;
29}
30
31
32describe("EdDSA test", function () {
33    let circuit;
34
35    this.timeout(100000);
36
37    before( async () => {
38        const cirDef = await compiler(path.join(__dirname, "circuits", "eddsa_test.circom"));
39
40        circuit = new snarkjs.Circuit(cirDef);
41
42        console.log("NConstrains EdDSA: " + circuit.nConstraints);
43    });
44
45    it("Sign a single 10 bytes from 0 to 9", async () => {
46        const msg = Buffer.from("00010203040506070809", "hex");
47
48//        const prvKey = eddsa.cratePrvKey();
49
50        const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");
51
52        const pubKey = eddsa.prv2pub(prvKey);
53
54        const pPubKey = babyJub.packPoint(pubKey);
55
56        const signature = eddsa.sign(prvKey, msg);
57
58        const pSignature = eddsa.packSignature(signature);
59        const uSignature = eddsa.unpackSignature(pSignature);
60
61        assert(eddsa.verify(msg, uSignature, pubKey));
62
63        const msgBits = buffer2bits(msg);
64        const r8Bits = buffer2bits(pSignature.slice(0, 32));
65        const sBits = buffer2bits(pSignature.slice(32, 64));
66        const aBits = buffer2bits(pPubKey);
67
68        const w = circuit.calculateWitness({A: aBits, R8: r8Bits, S: sBits, msg: msgBits});
69
70        assert(circuit.checkWitness(w));
71
72    });
73});