def collective_decryption(ct, auths=[]):
try:
#Generate ephimeral key
G = EcGroup(nid=conf.EC_GROUP)
tmp_priv = G.order().random()
tmp_pub = tmp_priv * G.generator()
#Encrypt with ephimeral key
enc_ct = Classes.Ct.enc(tmp_pub, ct)
for auth in auths: #Send for decryption to each authority
json_obj_str = enc_ct.to_JSON()
data = {'request':'partial_decrypt', 'contents': json_obj_str}
#print data
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((auth, conf.AUTH_PORT)) #connect to authority
SockExt.send_msg(s, json.dumps(data))
result = json.loads(SockExt.recv_msg(s))
enc_ct.b = EcPt.from_binary(binascii.unhexlify(result['return']),G)
s.shutdown(socket.SHUT_RDWR)
s.close()
#Decrypt using the ephimeral private key
value = enc_ct.dec(tmp_priv) #decrypt ct
return value
except Exception as e:
#print "Exception during collective decryption: ", e
return None
def ping(sock):
try:
rand = random.randint(1, 99999)
data = {"request": "ping", "contents": {"value": rand}}
SockExt.send_msg(sock, json.dumps(data))
result = json.loads(SockExt.recv_msg(sock))
if result["return"] == rand + 1:
return True
else:
return False
except Exception as e:
print "Exception while pinging: ", e
return False
def ping(sock):
try:
rand = random.randint(1, 99999)
data = {'request':'ping', 'contents': {'value':rand}}
SockExt.send_msg(sock, json.dumps(data))
result = json.loads(SockExt.recv_msg(sock))
if result['return'] == rand+1:
return True
else:
return False
except Exception as e:
print "Exception while pinging: ", e
return False
