def ZKPS(self, h, g, sig, pk, G, c_bar, sk, z1, z2, ri, P_bar): ''' calculates the ZKP for the correct format of the signature :param h: the public parameter from G2 :param g: the public parameter from G1 :param sig: the signature :param pk: the verification key :param G: the client side signature randomness :param c_bar: the blinded EV :param sk: the secret signature key :param z1: first part of the random decomposition of the secret signature parameter :param z2: second part of the random decomposition of the secret signature parameter :param ri: the server side signature randomness :param P_bar: the blinded pad :return: the ZKP parameters challenge and response ''' (ch, r) = ZKP.ZKP_correctFormatS(h, g, sig, pk, G, c_bar, sk, z1, z2, ri, P_bar, self.params) return (ch, r)
def testZKPS_oneParameter(self): groupObj = PairingGroup('BN254') params = 1 msg = [] msg.append("testmessage") el = ElGamal(params) agho = AGHOBlind(el) (pk_EV, sk_EV) = el.keygen() h = groupObj.random(G2) (sk_sig, pk_sig) = agho.keygen(h) (c, o) = el.encrypt(pk_EV, msg) (c_bar, P_bar, G, e, f1, f2) = agho.blind(c, pk_EV['g']) (sig_bar, z1, z2, ri) = agho.sign(pk_EV['g'], sk_sig, c_bar, h, G, P_bar) (ch, r) = ZKP.ZKP_correctFormatS(h, pk_EV['g'], sig_bar, pk_sig, G, c_bar, sk_sig, z1, z2, ri, P_bar, params) isCorrect = ZKP.verifyZKP_FormatS(h, pk_EV['g'], pk_sig, ch, r, c_bar, P_bar, G, sig_bar, params) print("ZKPS Test Result with one Parameter:", isCorrect)