def prover_state1(self):
print("PROVER 1: ")
(g, V) = Sigma.get(self, ['g', 'V'])
r = self.group.random(G2)
a1 = pair(g, r)
a2 = pair(V, r)
print("send r =>", r)
print("send a1 =>", a1)
print("send a2 =>", a2)
pk = Sigma.get(self, ['g','V','H'], dict)
Sigma.store(self, ('r',r) )
Sigma.setState(self, 3)
return { 'a1':a1, 'a2':a2, 'pk':pk }
def prover_state1(self):
print("PROVER 1: ")
(g, V) = Sigma.get(self, ['g', 'V'])
r1, r2 = self.group.random(ZR, 2)
a = (pair(V, g) ** -r1) * (pair(g, g) ** r2)
print("send g =>", g)
print("send V =>", V)
print("send r1 =>", r1)
print("send r2 =>", r2)
print("send a =>", a)
pk = Sigma.get(self, ['g','V','y'], dict)
Sigma.store(self, ('r1',r1), ('r2',r2) )
Sigma.setState(self, 3)
return { 'a':a, 'pk':pk }
def prover_state3(self, input):
print("PROVER 3: ")
(r, h, c) = Sigma.get(self, ['r', 'h', 'c'])
print("input c =>", c)
z = r * (h ** -c)
Sigma.setState(self, 5)
# need store and get functions for db
return {'z':z }
def verifier_state4(self, input):
(g, H, a, c, z) = Sigma.get(self, ['g','H','a','c','z'])
if a == (pair(g,z) * (H ** c)):
print("SUCCESS!!!!!!!"); result = 'OK'
else:
print("Failed!!!"); result = 'FAIL'
Sigma.setState(self, 6)
Sigma.setErrorCode(self, result)
return result
def prover_state3(self, input):
print("PROVER 3: ")
(r1, r2, v, sigma, c) = Sigma.get(self, ['r1','r2','v','sigma', 'c'])
print("input c =>", c)
z1 = r1 - sigma * c # need a way to get sigma index as part of init index (1..N)
z2 = r2 - v * c
print("send z1 =>", z1)
print("send z2 =>", z2)
Sigma.setState(self, 5)
return {'z1':z1, 'z2':z2 }
def verifier_state4(self, input):
print("VERIFIER 4: ")
(a1, a2, c, W, z, pk) = Sigma.get(self, ['a1','a2','c','W','z','pk'])
g, V, H = pk['g'], pk['V'], pk['H']
if a1 == pair(g,z) * (H ** c) and a2 == pair(V,z) * (W ** c):
print("SUCCESS!!!!!!!"); result = 'OK'
else:
print("Failed!!!"); result = 'FAIL'
Sigma.setState(self, 6)
Sigma.setErrorCode(self, result)
return result
def verifier_state4(self, input):
print("VERIFIER 4: ")
(a, c, z1, z2, pk) = Sigma.get(self, ['a','c','z1','z2','pk'])
g, y, V = pk['g'], pk['y'], pk['V']
print("get a =>", a)
if a == (pair(V,y) ** c) * (pair(V,g) ** -z1) * (pair(g,g) ** z2):
print("SUCCESS!!!!!!!"); result = 'OK'
else:
print("Failed!!!"); result = 'FAIL'
Sigma.setState(self, 6)
Sigma.setErrorCode(self, result)
return result
def prover_state1(self):
(g, h, H) = Sigma.get(self, ['g', 'h', 'H'])
r = self.group.random(G2)
a = pair(g, r)
Sigma.setState(self, 3)
return { 'r':r, 'a':a, 'g':g, 'h':h, 'H':H }
def prover_state3(self, input):
(r, h, c) = Sigma.get(self, ['r','h','c'])
z = r * (h ** -c)
Sigma.setState(self, 5)
return {'z':z }