def Obliviously_Send(self, M0,M1,num_of_OT, lam):
conn = self.conn
for i in xrange(num_of_OT):
print i
r=random.randrange(self.q)
c=random.randrange(self.q)
conn.send(str(c))
pk0 = conn.recv(200) #you should receive pk0 from the receiver via the sender_receiver channel
pk0r=modifiedPower(int(pk0),r,self.q)
gr=modifiedPower(self.g,r,self.q)
r0=(hashlib.sha512(str(pk0r)+str(0)).digest())
r00=str(r0)* int(math.ceil(num_of_OT/len(r0))+1)
cr=modifiedPower(c,r,self.q)
gcd=inv=-1
while gcd != 1 and inv <= 0 :
gcd,inv,k = euclid(pk0r,self.q)
pk1r=cr*inv%self.q
r1=(hashlib.sha512(str(pk1r)+str(1)).digest())
r10=str(r1) * int(math.ceil(num_of_OT/len(r1))+1)
E0=bin(int(M0[i])^ord(r00[i]))[2:].zfill(lam)
E1=bin(int(M1[i])^ord(r10[i]))[2:].zfill(lam)
conn.send(str(gr))
conn.send(str(E0))
conn.send(str(E1))
return True
def obliviouslyReceive(self, X,number_of_OT, lam):
client_socket = self.s
final = []
k=random.randrange(1,self.q+1);
for i in xrange(number_of_OT):
print i
c=int(client_socket.recv(200))
pk=list()
#print pk
pk.insert(X[i],modifiedPower(self.g,k,self.q))
gcd=inv=-1
while gcd != 1 and inv <= 0 :
gcd,inv,ui = euclid(modifiedPower(self.g,k,self.q),self.q)
pk.insert(1-X[i],(c*inv)%self.q)
client_socket.send(str(pk[0]))
gr=client_socket.recv(200)
M0=client_socket.recv(lam)
M1=client_socket.recv(lam)
E=[M0,M1]
grk = modifiedPower(int(gr),k,self.q)
r_guess0=(hashlib.sha512(str(grk)+str(X[i])).digest())
f=str(r_guess0)* int(math.ceil(number_of_OT/len(r_guess0))+1)
T=int(E[X[i]],2)^ord(f[i])
final.append(T)
return final