Update encrypt.py

paillier-service/encrypt.py

@@ -1,17 +1,55 @@
-#easyctf{3ncrypt_m3!}
-p = 8144194198641127053467521063088973929365485175581336279930490759203400725623086153929294542350943040473375790841894343662879542882143670576484983482676929
-q = 9349990237178389195581522619084514015305492951423232071317276234453300521753669715890246992825146527366147991960266180184131002960074501683578205688324193
-n = p*q
-l = (p-1)*(q-1)
-g = n+1
-mu = 50461441817124067084598541006218828107720370909059246792962232658242869571003990015294541684702084151173329882441771747115542549562899610400402036968340066285127945127930744036805832623326255171902722383305695091973581469008587730106329093915495096858331002656658189454919392650001488548518482449865519307486
-m = int(raw_input('Enter a message to encrypt: '))
-r = int(raw_input('Enter r (int): '))
-if m > 100000000000000000 or m < 0:
-    print('Bad m. We only take m from 0 to 100000000000000000.')
-    exit()
-if r > 100000000000000000 or r < 0:
-    print('Bad r. We only take r from 0 to 100000000000000000.')
-    exit()
-c = (pow(g,m,n**2)*pow(r,n,n**2))%(n**2)
-print 'c: '+str(c)
+#/usr/bin/env python
+
+import SocketServer,threading,os,time
+import signal
+
+
+PORT = 8570
+
+class incoming(SocketServer.BaseRequestHandler):
+    def handle(self):
+        atfork()
+        req = self.request
+
+        def recvline():
+            buf = ""
+            while not buf.endswith("\n"):
+                buf += req.recv(1)
+            return buf
+        signal.alarm(120)
+
+        try:
+            p = 8144194198641127053467521063088973929365485175581336279930490759203400725623086153929294542350943040473375790841894343662879542882143670576484983482676929
+            q = 9349990237178389195581522619084514015305492951423232071317276234453300521753669715890246992825146527366147991960266180184131002960074501683578205688324193
+            n = p*q
+            l = (p-1)*(q-1)
+            g = n+1
+            mu = 50461441817124067084598541006218828107720370909059246792962232658242869571003990015294541684702084151173329882441771747115542549562899610400402036968340066285127945127930744036805832623326255171902722383305695091973581469008587730106329093915495096858331002656658189454919392650001488548518482449865519307486
+            #m = int(req.recv('Enter a message to encrypt: '))
+            req.sendall('Enter a message to encrypt: \n')
+            m = int(recvline())
+
+            req.sendall('Enter r (int): \n')
+            r = int(recvline())
+            if m > 100000000000000000 or m < 0:
+                print('Bad m. We only take m from 0 to 100000000000000000.')
+                exit()
+            if r > 100000000000000000 or r < 0:
+                print('Bad r. We only take r from 0 to 100000000000000000.')
+                exit()
+            c = (pow(g,m,n**2)*pow(r,n,n**2))%(n**2)
+            print 'c: '+str(c)
+        except:
+            pass
+
+        req.sendall("Bye!\n")
+        req.close()
+
+class ReusableTCPServer(SocketServer.ForkingMixIn, SocketServer.TCPServer):
+  pass
+
+SocketServer.TCPServer.allow_reuse_address = True
+server = ReusableTCPServer(("0.0.0.0", PORT), incoming)
+
+print "Server listening on port %d" % PORT
+server.serve_forever()