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71 lines
2.2 KiB
71 lines
2.2 KiB
/*
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Copyright 2018 0kims association.
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This file is part of zksnark JavaScript library.
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zksnark JavaScript library is a free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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zksnark JavaScript library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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zksnark JavaScript library. If not, see <https://www.gnu.org/licenses/>.
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*/
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const BN128 = require("./bn128.js");
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const bn128 = new BN128();
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const G1 = bn128.G1;
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const G2 = bn128.G2;
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const pairing = bn128.pairing;
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module.exports = function isValid(vk_verifier, proof, publicSignals) {
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let full_pi_a = vk_verifier.A[0];
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for (let s= 0; s< vk_verifier.nPublic; s++) {
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full_pi_a = G1.add( full_pi_a, G1.mulScalar( vk_verifier.A[s+1], publicSignals[s]));
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}
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full_pi_a = G1.add( full_pi_a, proof.pi_a);
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if (! bn128.F12.equals(
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bn128.pairing( proof.pi_a , vk_verifier.vk_a ),
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bn128.pairing( proof.pi_ap , G2.g )))
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return false;
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if (! bn128.F12.equals(
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bn128.pairing( vk_verifier.vk_b, proof.pi_b ),
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bn128.pairing( proof.pi_bp , G2.g )))
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return false;
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if (! bn128.F12.equals(
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bn128.pairing( proof.pi_c , vk_verifier.vk_c ),
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bn128.pairing( proof.pi_cp , G2.g )))
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return false;
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if (! bn128.F12.equals(
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bn128.pairing( full_pi_a , proof.pi_b ),
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bn128.F12.mul(
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bn128.pairing( proof.pi_h , vk_verifier.vk_z ),
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bn128.pairing( proof.pi_c , G2.g ),
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)))
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return false;
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if (! bn128.F12.equals(
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bn128.F12.mul(
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bn128.pairing( G1.add(full_pi_a, proof.pi_c) , vk_verifier.vk_gb_2 ),
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bn128.pairing( vk_verifier.vk_gb_1 , proof.pi_b ),
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),
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bn128.pairing( proof.pi_kp , vk_verifier.vk_g )))
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return false;
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return true;
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};
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