Bob :P

ServerSocket.py

#!/usr/bin/python

#Carlos Triana



import socket #Library to use sockets

from random import randint

p = 13 #p and q must be primes

q = 17

n = p*q

Phin = (p-1)*(q-1)

d = 29

e = 53 # "e" value can't have the same factors of Phi(n), and   1<=e<=Phi(n)



print n

print Phin



s = socket.socket() 

s.bind(("localhost", 9999)) #Ip Server

s.listen(1)  



sc, addr = s.accept() #To accept connections



print "Conectado con IP: "+str(addr)

#x = randint(0, 20)

x = 2 #X value must be random, but in this case x = 2, because i calculated p,q,d and e in paper/pencil.



while True:

	recibido = sc.recv(1024)

	if recibido == "quit": #To exit the connection type quit

		break #Close the connection

	print "Recibido:", recibido #Printing the received

	print ">>Sending public key(d) ..."	

	sc.send(str(e)) #Sending values

	print ">>Sending n"

	sc.send(str(n))

	print ">>Sending a value x"

	print ">>Sending x = "+str(x)

	sc.send(str(x))

	print ">>Recibing y ..."

	recibingY = sc.recv(1024) #Receiving values

	Y = int(recibingY)

	print ">>Recibing r ..."

	recibingR = sc.recv(1024)

	R = int(recibingR)



	MyY = (pow(R, d))%(n)

	if MyY == Y: #If "y" calculated is equal to "y" received, send: "Access permited"

		print "Access permited :)"

	else: #If y's values are not equal, send: "Acces denied"

		print "Access denied, get the fuck out of here"

print "Bye"  

sc.close()  

s.close()