SRI - Update Circom Circuit to use Eddsa Signature verification about baseline HOT 5 CLOSED

@biscuitdey also circomlibjs supports EdDSA sigs such as with MimC e.g.

const buildEddsa = require("circomlibjs").buildEddsa;
import * as crypto from "crypto";

const SNARK_SCALAR_FIELD = 21888242871839275222246405745257275088548364400416034343698204186575808495617n;
const genRandomBabyJubValue = () => {
  // Prevent modulo bias
  //const lim = BigInt('0x10000000000000000000000000000000000000000000000000000000000000000')
  //const min = (lim - SNARK_FIELD_SIZE) % SNARK_FIELD_SIZE
  const min = BigInt("6350874878119819312338956282401532410528162663560392320966563075034087161851");

  let rand;
  // eslint-disable-next-line no-constant-condition
  while (true) {
    rand = BigInt("0x" + crypto.randomBytes(32).toString("hex"));

    if (rand >= min) {
      break;
    }
  }

  const privKey = rand % SNARK_SCALAR_FIELD;

  return privKey;
};

async function eddsasig() {
    const eddsa = await buildEddsa();
    const plaintext = rand = BigInt("0x" + crypto.randomBytes(32).toString("hex"));
    const F = eddsa.F;
    const issuerPrivKey = genRandomBabyJubValue();
    const issuerPubKey = eddsa.prv2pub(issuerPrivKey.toString());
    const signature = eddsa.signMiMC(issuerPrivKey.toString(), F.e(plaintext));

    return signature;
    }

from baseline.

@Therecanbeonlyone1969 Is there any library you recommend for generating Eddsa signatures? I found the following libraries :

1. @transmute/ed25519-signature-2018
2. @digitalcredentials/ed25519-signature-2020
3. @digitalbazaar/ed25519-signature-2020

from baseline.

@biscuitdey here you go https://github.com/paulmillr/noble-curves

from baseline.

@Therecanbeonlyone1969

@biscuitdey also circomlibjs supports EdDSA sigs such as with MimC e.g.

const buildEddsa = require("circomlibjs").buildEddsa;
import * as crypto from "crypto";

const SNARK_SCALAR_FIELD = 21888242871839275222246405745257275088548364400416034343698204186575808495617n;
const genRandomBabyJubValue = () => {
  // Prevent modulo bias
  //const lim = BigInt('0x10000000000000000000000000000000000000000000000000000000000000000')
  //const min = (lim - SNARK_FIELD_SIZE) % SNARK_FIELD_SIZE
  const min = BigInt("6350874878119819312338956282401532410528162663560392320966563075034087161851");

  let rand;
  // eslint-disable-next-line no-constant-condition
  while (true) {
    rand = BigInt("0x" + crypto.randomBytes(32).toString("hex"));

    if (rand >= min) {
      break;
    }
  }

  const privKey = rand % SNARK_SCALAR_FIELD;

  return privKey;
};

async function eddsasig() {
    const eddsa = await buildEddsa();
    const plaintext = rand = BigInt("0x" + crypto.randomBytes(32).toString("hex"));
    const F = eddsa.F;
    const issuerPrivKey = genRandomBabyJubValue();
    const issuerPubKey = eddsa.prv2pub(issuerPrivKey.toString());
    const signature = eddsa.signMiMC(issuerPrivKey.toString(), F.e(plaintext));

    return signature;
    }

I am using this same library

from baseline.

Currently blocked by #765

from baseline.