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Merge branch 'master' of github.com:iden3/circomlib

feature/babypbk
Jordi Baylina 5 years ago
parent
commit
b3ff8b246d
No known key found for this signature in database GPG Key ID: 7480C80C1BE43112
8 changed files with 40 additions and 35 deletions
  1. +6
    -3
      calcpedersenbases/calcpedersenbases.js
  2. +1
    -0
      index.js
  3. +2
    -7
      src/eddsa.js
  4. +15
    -11
      src/evmasm.js
  5. +8
    -8
      src/mimc7.js
  6. +3
    -3
      src/mimc_gencontract.js
  7. +3
    -2
      src/pedersenHash.js
  8. +2
    -1
      test/eddsa.js

+ 6
- 3
calcpedersenbases/calcpedersenbases.js

@ -1,14 +1,15 @@
const bn128 = require("snarkjs").bn128;
const bigInt = require("snarkjs").bigInt;
const createBlakeHash = require("blake-hash");
const assert = require("assert");
const babyJub = require("../src/babyjub");
function getPoint(S) {
const F = bn128.Fr;
const h = createBlakeHash("blake256").update(S).digest();
assert(h.length == 32);
if (h.length != 32) {
throw new Error("Invalid length")
}
let sign = false;
if (h[31] & 0x80) {
@ -52,7 +53,9 @@ function generatePoint(S) {
p = getPoint(S+"_"+sidx);
idx++;
}
assert(babyJub.inCurve(p), "Point not in curve");
if (!babyJub.inCurve(p)){
throw new Error("Point not in curve");
}
return p;
}

+ 1
- 0
index.js

@ -1,3 +1,4 @@
exports.smt = require("./src/smt");
exports.eddsa = require("./src/eddsa");
exports.mimc7 = require("./src/mimc7");
exports.babyJub = require("./src/babyjub");

+ 2
- 7
src/eddsa.js

@ -3,9 +3,7 @@ const bigInt = require("snarkjs").bigInt;
const babyJub = require("./babyjub");
const pedersenHash = require("./pedersenHash").hash;
const mimc7 = require("./mimc7");
const crypto = require("crypto");
exports.cratePrvKey = cratePrvKey;
exports.prv2pub= prv2pub;
exports.sign = sign;
exports.signMiMC = signMiMC;
@ -13,12 +11,9 @@ exports.verify = verify;
exports.verifyMiMC = verifyMiMC;
exports.packSignature = packSignature;
exports.unpackSignature = unpackSignature;
exports.pruneBuffer = pruneBuffer;
function cratePrvKey() {
return crypto.randomBytes(32);
}
function pruneBuffer(_buff) {
const buff = Buffer.from(_buff);
buff[0] = buff[0] & 0xF8;

+ 15
- 11
src/evmasm.js

@ -3,8 +3,7 @@
//
const Web3 = require("web3");
const assert = require("assert");
const Web3Utils = require("web3-utils");
class Contract {
constructor() {
@ -39,7 +38,7 @@ class Contract {
genLoadedLength = C.code.length;
}
return Web3.utils.bytesToHex(C.code.concat(this.code));
return Web3Utils.bytesToHex(C.code.concat(this.code));
}
stop() { this.code.push(0x00); }
@ -141,7 +140,9 @@ class Contract {
msize() { this.code.push(0x59); }
gas() { this.code.push(0x5a); }
label(name) {
assert(typeof this.labels[name] == "undefined", "Label already defined");
if (typeof this.labels[name] != "undefined") {
throw new Error("Label already defined");
}
this.labels[name] = this.code.length;
this.code.push(0x5b);
@ -149,21 +150,24 @@ class Contract {
}
push(data) {
const d = Web3.utils.hexToBytes(Web3.utils.toHex(data));
assert(d.length>0);
assert(d.length<=32);
const d = Web3Utils.hexToBytes(Web3Utils.toHex(data));
if (d.length == 0 || d.length > 32) {
throw new Error("Assertion failed");
}
this.code = this.code.concat([0x5F + d.length], d);
}
dup(n) {
assert(n>=0);
assert(n<16);
if (n < 0 || n >= 16) {
throw new Error("Assertion failed");
}
this.code.push(0x80 + n);
}
swap(n) {
assert(n>=1);
assert(n<=16);
if (n < 1 || n > 16) {
throw new Error("Assertion failed");
}
this.code.push(0x8f + n);
}

+ 8
- 8
src/mimc7.js

@ -1,6 +1,6 @@
const bn128 = require("snarkjs").bn128;
const bigInt = require("snarkjs").bigInt;
const Web3 = require("web3");
const Web3Utils = require("web3-utils");
const F = bn128.Fr;
const SEED = "mimc";
@ -8,8 +8,8 @@ const NROUNDS = 91;
exports.getIV = (seed) => {
if (typeof seed === "undefined") seed = SEED;
const c = Web3.utils.keccak256(seed+"_iv");
const cn = bigInt(Web3.utils.toBN(c).toString());
const c = Web3Utils.keccak256(seed+"_iv");
const cn = bigInt(Web3Utils.toBN(c).toString());
const iv = cn.mod(F.q);
return iv;
};
@ -18,13 +18,13 @@ exports.getConstants = (seed, nRounds) => {
if (typeof seed === "undefined") seed = SEED;
if (typeof nRounds === "undefined") nRounds = NROUNDS;
const cts = new Array(nRounds);
let c = Web3.utils.keccak256(SEED);
let c = Web3Utils.keccak256(SEED);
for (let i=1; i<nRounds; i++) {
c = Web3.utils.keccak256(c);
c = Web3Utils.keccak256(c);
const n1 = Web3.utils.toBN(c).mod(Web3.utils.toBN(F.q.toString()));
const c2 = Web3.utils.padLeft(Web3.utils.toHex(n1), 64);
cts[i] = bigInt(Web3.utils.toBN(c2).toString());
const n1 = Web3Utils.toBN(c).mod(Web3Utils.toBN(F.q.toString()));
const c2 = Web3Utils.padLeft(Web3Utils.toHex(n1), 64);
cts[i] = bigInt(Web3Utils.toBN(c2).toString());
}
cts[0] = bigInt(0);
return cts;

+ 3
- 3
src/mimc_gencontract.js

@ -2,13 +2,13 @@
// License: LGPL-3.0+
//
const Web3 = require("web3");
const Web3Utils = require("web3-utils");
const Contract = require("./evmasm");
function createCode(seed, n) {
let ci = Web3.utils.keccak256(seed);
let ci = Web3Utils.keccak256(seed);
const C = new Contract();
@ -51,7 +51,7 @@ function createCode(seed, n) {
C.mulmod(); // r=t^7 k q
for (let i=0; i<n-1; i++) {
ci = Web3.utils.keccak256(ci);
ci = Web3Utils.keccak256(ci);
C.dup(2); // q r k q
C.dup(0); // q q r k q
C.dup(0); // q q q r k q

+ 3
- 2
src/pedersenHash.js

@ -1,7 +1,6 @@
const bn128 = require("snarkjs").bn128;
const bigInt = require("snarkjs").bigInt;
const babyJub = require("./babyjub");
const assert = require("assert");
const createBlakeHash = require("blake-hash");
const GENPOINT_PREFIX = "PedersenGenerator";
@ -73,7 +72,9 @@ function getBasePoint(pointIdx) {
const p8 = babyJub.mulPointEscalar(p, 8);
assert(babyJub.inSubgroup(p8), "Point not in curve");
if (!babyJub.inSubgroup(p8)) {
throw new Error("Point not in curve");
}
bases[pointIdx] = p8;
return p8;

+ 2
- 1
test/eddsa.js

@ -2,6 +2,7 @@ const chai = require("chai");
const path = require("path");
const snarkjs = require("snarkjs");
const compiler = require("circom");
// const crypto = require("crypto");
const eddsa = require("../src/eddsa.js");
const babyJub = require("../src/babyjub.js");
@ -45,7 +46,7 @@ describe("EdDSA test", function () {
it("Sign a single 10 bytes from 0 to 9", async () => {
const msg = Buffer.from("00010203040506070809", "hex");
// const prvKey = eddsa.cratePrvKey();
// const prvKey = crypto.randomBytes(32);
const prvKey = Buffer.from("0001020304050607080900010203040506070809000102030405060708090001", "hex");

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