├── README.md ├── CryptoChat.py └── LICENSE /README.md: -------------------------------------------------------------------------------- 1 | # CryptoChat 2 | NSA-Proof Secure P2P Chat client 3 | 4 | NOTES: 5 | You may have port forwarded the desired chat port 6 | All communications are encrypted with XOR, AES, and base64 7 | To chat with someone make sure that they have your ip address and port you are using (get it from ipchicken.com). 8 | NEVER PUBLICLY POST YOUR IP! This could result in: Getting DDoSed, Doxed, being hacked, having the feds at your door, being killed, etc. 9 | Also make sure you are using the same keys as the person you are chatting with else it will not work. 10 | Always transfer the keys securely otherwise someone could eavesdrop on you and decrypt the conversation if they know what they are doing 11 | Always send the keys over a secure connection (SSL) since someone could be eavesdropping on your network and they could decrypt your conversation if they know what they are doing. 12 | Commands: 13 | /send : 14 | sends a file over the chat. 15 | /leave 16 | Closes chat client for both users chatting, ends session. 17 | /msg 18 | switch between different IPs while chatting (using the same keys) 19 | More to come soon. 20 | 21 | This program is under the GPLv3 license. 22 | -------------------------------------------------------------------------------- /CryptoChat.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/python 2 | # -*- coding: utf-8 -*- 3 | #------------------------------------------------------------------------------- 4 | # Name: CryptoChat 5 | # Purpose: Secure P2P chat client 6 | # Notes: Encrypted with XOR + AES + base64 7 | # custom chat protocol 8 | # 9 | # Author: Freak @ PopulusControl (aka sudoer) 10 | # 11 | # Created: 21/02/2015 12 | # Last update: 14/07/2015 13 | # 14 | # Copyright: (c) Freak 2015 15 | # Licence: GPLv3 16 | # This program is free software: you can redistribute it and/or modify 17 | # it under the terms of the GNU General Public License as published by 18 | # the Free Software Foundation, either version 3 of the License, or 19 | # (at your option) any later version. 20 | # 21 | # This program is distributed in the hope that it will be useful, 22 | # but WITHOUT ANY WARRANTY; without even the implied warranty of 23 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 | # GNU General Public License for more details. 25 | # 26 | # You should have received a copy of the GNU General Public License 27 | # along with this program. If not, see . 28 | #------------------------------------------------------------------------------- 29 | import sys 30 | import socket 31 | import base64 32 | import random 33 | import string 34 | import hashlib 35 | from Crypto.Cipher import AES 36 | from Crypto import Random 37 | from threading import Thread 38 | import getpass 39 | class CryptoClient(): 40 | def __init__(self): 41 | print "Welcome to CryptoChat, a secure P2P chat client coded by Freak" 42 | print "if you dont know what your doing read the README.md!!!" 43 | self.IP = raw_input("Please enter the IP address you wish to chat with: ") 44 | self.PORT = int(raw_input("Enter the port for communication: ")) 45 | print 46 | print "Now enter the keys for the different encryption methods, make sure they are different." 47 | print "Please note they will note be printed for your security." 48 | print 49 | self.EncryptKeyXOR = getpass.getpass("Enter desired key for XOR encryption: ") 50 | self.EncryptKeyAES = hashlib.md5(getpass.getpass("Enter a secure passphrase for AES: ")).hexdigest() 51 | ###Shit for AES padding 52 | BS = 16 53 | self.pad = lambda s: s + (BS - len(s) % BS) * chr(BS - len(s) % BS) 54 | self.unpad = lambda s : s[:-ord(s[len(s)-1:])] 55 | ###Start chat server and client 56 | Thread(target=self.RecvMSG, args=()).start() 57 | self.SendMSG() 58 | def EncryptAES(self,raw): 59 | raw = self.pad(raw) 60 | iv = Random.new().read( AES.block_size ) 61 | cipher = AES.new( self.EncryptKeyAES, AES.MODE_CBC, iv ) 62 | return base64.b64encode( iv + cipher.encrypt( raw ) ) 63 | def DecryptAES(self,enc): 64 | enc = base64.b64decode(enc) 65 | iv = enc[:16] 66 | cipher = AES.new(self.EncryptKeyAES, AES.MODE_CBC, iv ) 67 | return self.unpad(cipher.decrypt( enc[16:] )) 68 | def XOR(self,securekey,data,mode): 69 | if mode == 1: 70 | securekey=securekey[::-1] 71 | temp='' 72 | for char in securekey: 73 | for x in data: 74 | temp += chr(ord(x)^ord(char)) 75 | data=temp 76 | temp='' 77 | return data 78 | def EncryptMSG(self,data): 79 | data = self.XOR(self.EncryptKeyXOR,data,0) 80 | data = self.EncryptAES(data) 81 | return data 82 | def DecryptMSG(self,data): 83 | data = self.DecryptAES(data) 84 | data = self.XOR(self.EncryptKeyXOR,data,1) 85 | return data 86 | def SendMSG(self): 87 | clientsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP 88 | print 89 | print "You are now talking to '"+self.IP+"'" 90 | while 1: 91 | message = raw_input("") 92 | if message.startswith("/send"): #send file command 93 | self.SendFILE(message.split(" ")[1]) 94 | continue 95 | if message=="/leave": 96 | message = self.EncryptMSG("\x03") 97 | clientsock.sendto(message, (self.IP, self.PORT)) 98 | sys.exit(0) 99 | if message.startswith("/msg"): 100 | self.IP=message.split(" ")[1] 101 | print "[CLIENT] You are now talking to '"+self.IP+"'" 102 | continue 103 | else: 104 | message = self.EncryptMSG("\x01"+message) 105 | clientsock.sendto(message, (self.IP, self.PORT)) 106 | def SendFILE(self,file_): 107 | if file_.startswith(".") or file_.startswith("/"): #added security measure. 108 | print "[CLIENT] For security and safety reasons, filenames starting with '.' or '/' will not be sent. Aborting." 109 | else: 110 | clientsock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP 111 | data="\x02"+file_+"\xFF" 112 | f=open(file_,"rb") 113 | data+=f.read() 114 | f.close() 115 | data = self.EncryptMSG(data) 116 | clientsock.sendto(data, (self.IP, self.PORT)) 117 | print "[CLIENT] File Sent!" 118 | def RandStr(self,length): 119 | return ''.join(random.choice(string.letters) for _ in range(length)) 120 | def RecvMSG(self): 121 | serversocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) #UDP 122 | serversocket.bind((self.IP, self.PORT)) 123 | while 1: 124 | (data, addr) = serversocket.recvfrom(1073741824) # buffer size is 1 gbit (for large files/images) 125 | data = self.DecryptMSG(data) 126 | if data.startswith("\x02"): 127 | filename='' 128 | data=list(data) 129 | del data[0] 130 | for i in data: 131 | if i=="\xFF": 132 | break 133 | else: 134 | filename += i 135 | del data[0] # delete protocol char 136 | del data[:len(filename)] # delete file end char 137 | if filename.startswith(".") or filename.startswith("/"): #attempted exploit! 138 | print "[!!!ALERT!!!] "+addr[0] + " has attempted to overwrite your " + filename 139 | else: 140 | print "[CLIENT] " + addr[0] + " has sent " + filename 141 | print "[CLIENT] Downloading..." #download dat shit 142 | data=''.join(data) 143 | f = open(filename,"wb") 144 | f.write(data) 145 | f.close() 146 | print "[CLIENT] Saved." 147 | elif data.startswith("\x01"): # all messages start with "\x01" to prevent file spamming 148 | data=list(data) 149 | del data[0] 150 | data=''.join(data) 151 | print "["+addr[0]+"] > | "+data 152 | elif data.startswith("\x03"): 153 | print "[CLIENT] "+addr[0]+" has left." 154 | sys.exit(0) 155 | 156 | if __name__=="__main__": 157 | CryptoClient() 158 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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