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Blake to Blake2b and use of native big num

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Jordi Baylina
2020-04-18 22:33:59 +02:00
parent 6df6e9cb1c
commit b2ac4daaa7
42 changed files with 572 additions and 1191 deletions
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22
src/mimcsponge.js
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@@ -1,7 +1,7 @@
const bigInt = require("big-integer");
const Scalar = require("ffjavascript").Scalar
const Web3Utils = require("web3-utils");
const ZqField = require("ffjavascript").ZqField;
const F = new ZqField(bigInt("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
const F = new ZqField(Scalar.fromString("21888242871839275222246405745257275088548364400416034343698204186575808495617"));
const SEED = "mimcsponge";
const NROUNDS = 220;
@@ -9,7 +9,7 @@ const NROUNDS = 220;
exports.getIV = (seed) => {
if (typeof seed === "undefined") seed = SEED;
const c = Web3Utils.keccak256(seed+"_iv");
const cn = bigInt(Web3Utils.toBN(c).toString());
const cn = Scalar.fromString(Web3Utils.toBN(c).toString());
const iv = cn.mod(F.p);
return iv;
};
@@ -24,23 +24,23 @@ exports.getConstants = (seed, nRounds) => {
const n1 = Web3Utils.toBN(c).mod(Web3Utils.toBN(F.p.toString()));
const c2 = Web3Utils.padLeft(Web3Utils.toHex(n1), 64);
cts[i] = bigInt(Web3Utils.toBN(c2).toString());
cts[i] = F.e(Web3Utils.toBN(c2).toString());
}
cts[0] = bigInt(0);
cts[cts.length - 1] = bigInt(0);
cts[0] = F.e(0);
cts[cts.length - 1] = F.e(0);
return cts;
};
const cts = exports.getConstants(SEED, NROUNDS);
exports.hash = (_xL_in, _xR_in, _k) =>{
let xL = bigInt(_xL_in);
let xR = bigInt(_xR_in);
const k = bigInt(_k);
let xL = F.e(_xL_in);
let xR = F.e(_xR_in);
const k = F.e(_k);
for (let i=0; i<NROUNDS; i++) {
const c = cts[i];
const t = (i==0) ? F.add(xL, k) : F.add(F.add(xL, k), c);
const xR_tmp = bigInt(xR);
const xR_tmp = F.e(xR);
if (i < (NROUNDS - 1)) {
xR = xL;
xL = F.add(xR_tmp, F.pow(t, 5));
@@ -66,7 +66,7 @@ exports.multiHash = (arr, key, numOutputs) => {
let C = F.zero;
for (let i=0; i<arr.length; i++) {
R = F.add(R, bigInt(arr[i]));
R = F.add(R, F.e(arr[i]));
const S = exports.hash(R, C, key);
R = S.xL;
C = S.xR;