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Change bases and IV

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This commit is contained in:
Jordi Baylina
2018-12-16 08:05:20 +01:00
parent 6d6558370f
commit 37edfc1834
13 changed files with 154 additions and 298 deletions
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15
src/mimc7.js
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@@ -3,11 +3,20 @@ const bigInt = require("snarkjs").bigInt;
const Web3 = require("web3");
const F = bn128.Fr;
const SEED = "iden3_mimc";
const nRounds = 91;
const SEED = "mimc";
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 iv = cn.mod(F.q);
return iv;
};
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);
for (let i=1; i<nRounds; i++) {
@@ -27,7 +36,7 @@ exports.hash = (_x_in, _k) =>{
const x_in = bigInt(_x_in);
const k = bigInt(_k);
let r;
for (let i=0; i<nRounds; i++) {
for (let i=0; i<NROUNDS; i++) {
const c = cts[i];
const t = (i==0) ? F.add(x_in, k) : F.add(F.add(r, k), c);
r = F.exp(t, 7);