Secure Chat

To start with params, use that

--port PORT, -p PORT #=> Server port to run, default 3355

--host HOST, -h HOST #=> Server host to run, default 127.0.0.1

--remote_port PORT, -P PORT #=> Remote to connect port

--remote_host HOST, -H HOST #=> Remote to connect host

--crypto CRYPTO, -c CRYPTO #=> Algorithm to encryption and decriptation, default sdes

--key KEY, -k KEY #=> Your initial key

example:

Creates a server on localhost:3355 as RC4 layer and ottony93chacha key

node lib/index.js -c rc4 -k ottony93chacha

Creates a server on localhost:8080 and connect to localhost:3355 as RC4 layer and ottony93chacha key

node lib/index.js -p 8080 -P 3355 -c rc4 -k ottony93chacha

If theese two example was run in differents sessions, a connection will be created

Usage

First, create a server

> node lib/index.js

Server created 127.0.0.1:3355
Diffie-Hellman server listening on 127.0.0.1:3356

Now, one connection

> node lib/index.js --port 8080 --remote_port=3355

Server created 127.0.0.1:8080
Diffie-Hellman server listening on 127.0.0.1:8081
[127.0.0.1] connected

A message on server will be displayed

[::ffff:127.0.0.1] connected

Keys

Every key will be displayed as hexadecimal, but imported as utf-8

Change crypto layer to SDES with key 
6f74746f6e793933636861636861

To change a key, just set

\key=SOME_KEY

Esteganografia

If you you want to export your key, just use the following and a bitmap file will be created with your key.

\export_key=/home/user/path/to/export/secret_key.bmp

If you receive a bitmap key, just use the following and the key will be imported

\import_key=/home/another_user/secret_key.bmp

Example:

> \key=Esteganografia
Change crypto layer to SDES with key 
4573746567616e6f677261666961

> \export_key=/home/ottony/secret_key.bmp
Exported key 4573746567616e6f677261666961 to /home/ottony/secret_key.bmp

> \import_key=/home/ottony/secret_key.bmp
Change crypto layer to SDES with key 
4573746567616e6f677261666961

Diffie Hellman

By default, a server another server will be created on port + 1 to exchange key by Diffie Hellman, for example:

> node lib/index.js -p 8080 -k ottony93chacha 

Server created 127.0.0.1:8080
Diffie-Hellman server listening on 127.0.0.1:8081

Change crypto layer to SDES with key 6f74746f6e793933636861636861

If you wat to use diffie hellman to exchange keys, first connect with someone. After that, uses real time config to choice Diffie Hellman that could be like this

\diffie_hellman=true

or set the key as dh

\key=dh

Because to exchange key we need another socket, the last connected should request because he know the server port. If the first connected, the server, want to request Diffie Hellman, first set the remote port and than request exchange.

\remote_port=8080
\key=dh

Crypto Layer

If you want to change the crypto algorithm, just configure that

SDES

> \crypto=sdes
Change crypto layer to SDES with key 
4573746567616e6f677261666961

RC4

\crypto=rc4
Change crypto layer to RC4 with key 
4573746567616e6f677261666961

If nothing changes, you alread have this crypto layer.

ottony / secure_chat