def handlePeer(sock, addr):
cmd = sock.recv(constants.BUFF).decode(constants.FORMAT)
cmd = cmd.split()
if (cmd[0].lower() == 'send'):
if (len(cmd) == 4):
senderSentKey = int(
sock.recv(constants.BUFF).decode(constants.FORMAT))
receiverKey = crypt.diffie(constants.DIFFIE_GENERATOR, int(myKey),
constants.DIFFIE_PRIME)
sock.send(str(receiverKey).encode(constants.FORMAT))
sharedKeyWithReceiver = crypt.diffie(senderSentKey, int(myKey),
constants.DIFFIE_PRIME)
cipher = sock.recv(constants.BUFF)
decryptedMsg = crypt.desDecrypt(
cipher, str(sharedKeyWithReceiver)).decode(constants.FORMAT)
print(decryptedMsg)
if (cmd[0].lower() == 'sendgroup'):
cipher = sock.recv(constants.BUFF)
group = cmd[1]
decryptedMsg = crypt.desDecrypt(cipher, groupNonce[group]).decode(
constants.FORMAT)
print(decryptedMsg)
def sendEncryptedNonce(conn, cmd):
senderSentKey = int(conn.recv(constants.BUFF).decode(constants.FORMAT))
myKey = random.randint(0, constants.MAX_RANDOM)
receiverSendKey = crypt.diffie(constants.DIFFIE_GENERATOR, int(myKey), constants.DIFFIE_PRIME)
conn.send(str(receiverSendKey).encode(constants.FORMAT))
sharedKey = crypt.diffie(senderSentKey, int(myKey), constants.DIFFIE_PRIME)
encryptedNonce = crypt.desEncrypt(groupNonce[cmd[1]].encode(constants.FORMAT), str(sharedKey))
conn.send(encryptedNonce)
def sendToPeer(peerPort, cmd):
peerSock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
PEER_ADDR = (IP, peerPort)
try:
peerSock.connect(PEER_ADDR)
except Exception as e:
print(e)
return
peerSock.send(cmd.lower().encode(constants.FORMAT))
cmd = cmd.split()
if (cmd[0].lower() == 'send'):
# To send message (not files)
if (len(cmd) == 4):
msg = cmd[-1]
senderKey = crypt.diffie(constants.DIFFIE_GENERATOR, int(myKey),
constants.DIFFIE_PRIME)
peerSock.send(str(senderKey).encode(constants.FORMAT))
receiverSentKey = int(
peerSock.recv(constants.BUFF).decode(constants.FORMAT))
sharedKeyWithSender = crypt.diffie(receiverSentKey, int(myKey),
constants.DIFFIE_PRIME)
encryptedMsg = crypt.desEncrypt(msg.encode(constants.FORMAT),
str(sharedKeyWithSender))
peerSock.send(encryptedMsg)
if (cmd[0].lower() == 'sendgroup'):
# file sending left
msg = cmd[-1]
encryptedMsg = crypt.desEncrypt(msg.encode(constants.FORMAT),
groupNonce[cmd[1]])
peerSock.send(encryptedMsg)
def handleServerReply(cmd, clientSock):
cmd = cmd.split()
reply = clientSock.recv(constants.BUFF).decode()
if (reply.split()[0] == 'Error:'):
print(reply)
return
if (cmd[0].lower() == 'create_account' or cmd[0].lower() == 'login'):
print(reply)
global isLoggedIn
isLoggedIn = True
clientSock.send(str(PORT).encode(constants.FORMAT))
global myroll
if (cmd[0].lower() == 'login'):
myroll = int(cmd[1])
else:
myroll = int(cmd[2])
global myKey
myKeyHex = crypt.sha(
str(random.randint(0, constants.MAX_RANDOM) +
int(myroll)).encode())
myKey = int(myKeyHex, 16)
return
if (cmd[0].lower() == 'create' or cmd[0].lower() == 'join'):
print(reply)
clientSock.send(str(myroll).encode(constants.FORMAT))
myKeyy = random.randint(0, constants.MAX_RANDOM)
senderSendKey = crypt.diffie(constants.DIFFIE_GENERATOR, myKeyy,
constants.DIFFIE_PRIME)
clientSock.send(str(senderSendKey).encode(constants.FORMAT))
receiverSentKey = int(
clientSock.recv(constants.BUFF).decode(constants.FORMAT))
sharedKey = crypt.diffie(receiverSentKey, int(myKeyy),
constants.DIFFIE_PRIME)
cipher = clientSock.recv(constants.BUFF)
decryptedMsg = crypt.desDecrypt(cipher, str(sharedKey)).decode(
constants.FORMAT)
global groupNonce
groupNonce[cmd[1]] = decryptedMsg
return
if (cmd[0].lower() == 'list'):
reply = reply.split("$$")
for i in reply:
print(i)
return
if (cmd[0].lower() == 'send'):
thread = threading.Thread(target=sendToPeer,
args=(int(reply), ' '.join(cmd)))
thread.start()
return
if (cmd[0].lower() == 'sendgroup'):
print(reply)
clientSock.send('acknowledged'.encode(constants.FORMAT))
for i in cmd[1:-1]:
portsList = clientSock.recv(constants.BUFF).decode().split("$$")
clientSock.send('acknowledged'.encode(constants.FORMAT))
for port in portsList:
if (port != str(PORT) and len(port) > 3):
thread = threading.Thread(target=sendToPeer,
args=(int(port), cmd[0] + ' ' +
i + ' ' + cmd[-1]))
thread.start()
def handlePeer(sock, addr):
cmd = sock.recv(constants.BUFF).decode(constants.FORMAT)
cmd = cmd.split()
if(cmd[0].lower() == 'send'):
if(len(cmd) == 4):
senderSentKey = int(sock.recv(constants.BUFF).decode(constants.FORMAT))
receiverKey = crypt.diffie(constants.DIFFIE_GENERATOR, int(myKey), constants.DIFFIE_PRIME)
sock.send(str(receiverKey).encode(constants.FORMAT))
sharedKeyWithReceiver = crypt.diffie(senderSentKey, int(myKey), constants.DIFFIE_PRIME)
cipher = sock.recv(constants.BUFF)
decryptedMsg = crypt.desDecrypt(cipher, str(sharedKeyWithReceiver)).decode(constants.FORMAT)
print(decryptedMsg)
if len(cmd) == 5:
senderSentKey = int(sock.recv(constants.BUFF).decode(constants.FORMAT))
receiverKey = crypt.diffie(constants.DIFFIE_GENERATOR, int(myKey), constants.DIFFIE_PRIME)
sock.send(str(receiverKey).encode(constants.FORMAT))
sharedKeyWithReceiver = crypt.diffie(senderSentKey, int(myKey), constants.DIFFIE_PRIME)
cipher = sock.recv(constants.BUFF)
decryptedMsg = crypt.desDecrypt(cipher, str(sharedKeyWithReceiver)).decode(constants.FORMAT)
print(decryptedMsg)
#filecontent = sock.recv(constants.BUFF)
#decryptedMsg1 = crypt.desDecrypt(filecontent, str(sharedKeyWithReceiver)).decode(constants.FORMAT)
#print(decryptedMsg1)
#print(type(decryptedMsg1))
total = b""
extension = decryptedMsg.split(".")[1]
while True:
print("Receiving....")
data = sock.recv(constants.BUFF)
#print(type(data))
if len(data) < 1:
total+=b''
break
decryptedMsg = crypt.desDecrypt(data, str(sharedKeyWithReceiver))
#print(type(decryptedMsg))
total += decryptedMsg
#numberchunk = numberchunk-1
#filetodown.write(decryptedMsg)
filetodown = open("ranjan."+extension, "wb")
filetodown.write(total)
filetodown.close()
print("hogaya")
if(cmd[0].lower() == 'sendgroup'):
if cmd[1].lower() == "file":
print(cmd)
sock.send("abc".encode(constants.FORMAT))
group = cmd[2]
cipher = sock.recv(constants.BUFF)
print(cipher,"cipher")
fileName = crypt.desDecrypt(cipher, str(groupNonce[group])).decode(constants.FORMAT)
print(fileName,"file")
print(type(fileName))
extension = fileName.split(".")[1]
total = b''
while True:
print("Receiving....")
data = sock.recv(constants.BUFF)
#print(type(data))
if len(data) < 1:
total+=b''
break
decryptedMsg = crypt.desDecrypt(data, groupNonce[group])
#print(type(decryptedMsg))
total += decryptedMsg
#print(decryptedMsg)
filetodown = open("ag."+extension, "wb")
filetodown.write(total)
filetodown.close()
print("hogaya")
else:
cipher = sock.recv(constants.BUFF)
group = cmd[1]
decryptedMsg = crypt.desDecrypt(cipher, groupNonce[group]).decode(constants.FORMAT)
print(decryptedMsg)
def sendToPeer(peerPort, cmd):
peerSock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
PEER_ADDR = (IP, peerPort)
try:
peerSock.connect(PEER_ADDR)
except Exception as e:
print(e)
return
peerSock.send(cmd.lower().encode(constants.FORMAT))
cmd = cmd.split()
if(cmd[0].lower() == 'send'):
# To send message (not files)
if(len(cmd) == 4):
msg = cmd[-1]
senderKey = crypt.diffie(constants.DIFFIE_GENERATOR, int(myKey), constants.DIFFIE_PRIME)
peerSock.send(str(senderKey).encode(constants.FORMAT))
receiverSentKey = int(peerSock.recv(constants.BUFF).decode(constants.FORMAT))
sharedKeyWithSender = crypt.diffie(receiverSentKey, int(myKey), constants.DIFFIE_PRIME)
encryptedMsg = crypt.desEncrypt(msg.encode(constants.FORMAT), str(sharedKeyWithSender))
peerSock.send(encryptedMsg)
if(len(cmd) == 5):
#send rollno username file loc;
loc = cmd[-1]
fileName = cmd[-2]
print(loc, fileName)
senderKey = crypt.diffie(constants.DIFFIE_GENERATOR, int(myKey), constants.DIFFIE_PRIME)
peerSock.send(str(senderKey).encode(constants.FORMAT))
receiverSentKey = int(peerSock.recv(constants.BUFF).decode(constants.FORMAT))
sharedKeyWithSender = crypt.diffie(receiverSentKey, int(myKey), constants.DIFFIE_PRIME)
filetosend = open((loc+fileName), "rb")
print("file open hua")
file_size = os.path.getsize((loc+fileName))
print(file_size)
numberofChunk = math.ceil(file_size/constants.BUFF)
encryptedMsg = crypt.desEncrypt(fileName.encode(constants.FORMAT), str(sharedKeyWithSender))
peerSock.send(encryptedMsg)
data = filetosend.read()
encryptedMsg = crypt.desEncrypt(data, str(sharedKeyWithSender))
peerSock.sendall(encryptedMsg)
print("Send hua")
filetosend.close()
print("File Sent Successfully")
if(cmd[0].lower() == 'sendgroup'):
# file sending left
if len(cmd) < 3:
print("Error: Wrong Query")
exit(0)
#sendgroup a b c "hemloo" - akshay
#sendgroup a b c abc.txt ./ - apna
msg = cmd[-1]
fileCheck = cmd[1]
if fileCheck.lower() == "file":
fileName = cmd[-2]
location = cmd[-1]
filetosend = open((location+fileName), "rb")
#encryptedMsg = crypt.desEncrypt(fileName.encode(constants.FORMAT), str(sharedKeyWithSender))
print(fileName,"before")
print("filetype", type(fileName))
#print(cmd[2],"cmd2",type(cmd[2]))
#print(groupNonce[cmd[2]], "grpnonce", type(groupNonce[cmd[2]]))
peerSock.recv(constants.BUFF)
encryptedMsg = crypt.desEncrypt(fileName.encode(constants.FORMAT), str(groupNonce[cmd[2]]))
#print(fileName.encode(constants.FORMAT))
peerSock.send(encryptedMsg)
# print(fileName, "after")
data = filetosend.read()
encryptedMsg = crypt.desEncrypt(data, groupNonce[cmd[2]])
peerSock.sendall(encryptedMsg)
else:
encryptedMsg = crypt.desEncrypt(msg.encode(constants.FORMAT), groupNonce[cmd[1]])
peerSock.send(encryptedMsg)
