Securechat is a QT based client/server chat utility using ssl/tls (openssl) to establish an encrypted communication between the two parties. This program is a porting of my chat program securechat from ncurses to QT.

This program is fully interoperable with its ncurses counterpart.

The ncurses version is also available in my github site.

images qtchat1.png

• SSL 1.0 (will be upgraded asap)
  
• QT5
  

• OSX 10.13.6
• Ubuntu 18 LTS

• OSX 10.13.6
• Ubuntu 18.04.2 LTS
• Windows 10 ((build 17134)

• sudo apt install libssl1.0-dev
  

• From the source directory:

  qmake
  make
  

1. Create Certification Authority:
   $ mkdir $HOME/.securechat
   $ cd $HOME/.securechat
   $ openssl req -out ca.pem -new -x509
   

2. Server Private Key:
   $ openssl genrsa -out server.key 4096
   

3. Certificate Request:
   $ openssl req -key server.key -new -out server.req
   

4. Certificate Sequence (a progressive number):
   $ echo "11" > file.seq
   

5. Public Key:
   $ openssl x509 -req -in server.req -CA ca.pem -CAkey privkey.pem -CAserial file.seq -out server.pem

6. Only the owner of the server.key and the other private archives can be able to read or modify those files, check the permissions and change it in case of wrong privileges!
   $ chmod -R 600 *
   

• Note: This program support the certificate passphrase, if it is used on a shared computer, it is strongly recommended to use this feature.

Request the server.pem certificate to the server counterpart and insert that file in:
$HOME/.securechat/TrustStore.pem

I'm working to an experimental Windows version that is included in the distribution.
It was produced from the Linux/OSX version with minimum changes.
It requires QT and Mingw on Windows:

• Upgraded Windows 10;
• 5_12_2_
• Mingw

After compiling the source code, it's required to add these paths to the PATH variable:

C:\Qt\5.12.3\mingw73_64\bin;C:\Qt\Tools\mingw730_64\opt\bin;

The procedure to create openssl certificates is the same, but , the target directory is:

C:\securechat