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working with some errors yet

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Jordi Baylina
2018-12-13 19:53:32 +01:00
parent 38fc4b7396
commit ccaa7ff23b
11 changed files with 24599 additions and 150 deletions
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29
src/mimc7.js
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@@ -3,35 +3,34 @@ const bigInt = require("snarkjs").bigInt;
const Web3 = require("web3");
const F = bn128.Fr;
module.exports.hash = MiMC7Hash;
module.exports.getConstants = getConstants;
const SEED = "iden3_mimc";
const nRounds = 91;
function getConstants(seed, nRounds) {
exports.getConstants = (seed, nRounds) => {
const cts = new Array(nRounds);
let c = Web3.utils.keccak256(SEED);
for (let i=1; i<nRounds; i++) {
c = Web3.utils.keccak256(c);
const n1 = Web3.utils.toBN(c).mod(Web3.utils.toBN(F.q.toString()));
cts[i] = Web3.utils.padLeft(Web3.utils.toHex(n1), 64);
const c2 = Web3.utils.padLeft(Web3.utils.toHex(n1), 64);
cts[i] = bigInt(Web3.utils.toBN(c2).toString());
}
cts[0] = "0x0000000000000000000000000000000000000000000000000000000000000000";
cts[0] = bigInt(0);
return cts;
}
};
function MiMC7Hash(_x_in, _k, nRounds) {
const cts = exports.getConstants(SEED, 91);
exports.hash = (_x_in, _k) =>{
const x_in = bigInt(_x_in);
const k = bigInt(_k);
const cts = getConstants(SEED, nRounds);
let r;
for (let i=0; i<nRounds; i++) {
const c = bigInt(Web3.utils.toBN(cts[i]).toString());
let t = (i==0) ? F.add(x_in, k) : F.add(F.add(r, k), c);
let t2 = F.square(t);
let t4 = F.square(t2);
r = F.mul(F.mul(t4, t2), t);
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);
}
return F.affine(F.add(r, k));
}
};