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pchat

pchat is a peer to peer private chat using two key pairs per user: one for the secure channel (TLS 1.3) and one for the messages content in order to achieve forward secrecy.

Messages are never stored. Both peers need to be online for the communication to be possible. Group chat is not implemented. Only short text messages can be sent.

This is a pet project to learn cryptography, don't use it to communicate real secrets.

Build:

go build

Generating keys:

To test pchat, generate keys for two users

./pchat -i marcelo
./pchat -i sonia

Import contacts:

mkdir ~/.pchat/contacts/marcelo
cp ~/.pchat/marcelo.crt ~/.pchat/contacts/marcelo/crt
cp ~/.pchat/marcelo.pub ~/.pchat/contacts/marcelo/pub
echo "https://localhost:3008" ~/.pchat/contacts/marcelo/endpoint

mkdir ~/.pchat/contacts/sonia
cp ~/.pchat/sonia.crt ~/.pchat/contacts/sonia/crt
cp ~/.pchat/sonia.pub ~/.pchat/contacts/sonia/pub
echo "https://localhost:3009" ~/.pchat/contacts/sonia/endpoint

Chat:

./pchat -i marcelo -contact sonia -port 3008
./pchat -i sonia -contact marcelo -port 3009