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GPIGEON
========
Gpigeon generate links for a GPG user to be sent to a non technical person (or
not a GPG user) so they can send you encrypted mail messages via a one-time
web link.
Feels of déjàvu ? I was inspired by [https://hawkpost.co](https://hawkpost.co) but wasn't really
interested in the multi-user perspective and managing a database.
If you want a multi-user version, please check out the [registering+multiusersupport](https://git.les-miquelots.net/gpigeon/tree/?h=registering%2bmultiusersupport) branch.
Word of warning, it's not totally completed.
Features
========
- Single user: no database required.
- One-time GPG form: after sending the encrypted message, the generated form
self-destructs.
- Cookie based login. If you block cookies, it will switch back to
hidden fields so you can still login.
- A table of the links generated is visible when you connect so you can
keep track of what has been created. You can also delete link
individually, or all at once.
- No javascript used at the moment.
- If needed, you can attach a file. It'll be encrypted alongside the message. **100MB limit by default**.
Dependencies
============
You will need perl and the following modules and my perl version is **v5.34.0**, YMMV:
- CGI
- CGI::Carp
- CGI::Cookie
- Crypt::Argon2
- DBI
- DBD::SQLite
- Email::Valid
- Mail::GPG
- MIME::Entity
- File::Path and File::stat (available by default in recent perl installs)
- Net:SSLeay
- Net::SMTP
- Net::SMTPS
- String::Random
- Term::ReadKey
Having a webserver with CGI support or a separate CGI engine is needed. I'm using nginx and fcgiwrap.
Installation
============
Don't forget to copy `config.def.mk` into `config.mk` and tune
the variables to your liking. Then, you can run the good old:
```bash
# you will need to do "sudo make install" if you
# are a non root user
make install
```
You should also look in the
[gpigeon-template.cgi](https://git.les-miquelots.net/gpigeon/plain/gpigeon-template.cgi)
and [link-tmpl-template.cgi](https://git.les-miquelots.net/gpigeon/plain/link-tmpl-template.cgi) source code, you should figure things out quickly.
**Hint**: look for variables values ending in _goes_here_.
Your nginx configuration should look like this:
```nginx
server {
listen 80;
server_name ggon.example.com;
location / {
return 301 https://$host$request_uri;
}
}
server {
listen 443 ssl http2;
root /var/www/gpigeon;
server_name ggon.example.com;
ssl_certificate /etc/letsencrypt/live/ggon.example.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/ggon.example.com/privkey.pem;
error_log /var/log/gpigeon.log;
index index.html index.htm;
location = / {
return 301 /cgi-bin/gpigeon.cgi;
}
location = /cgi-bin/gpigeon.cgi {
ssi off;
gzip off;
fastcgi_pass unix:/run/fcgiwrap.sock;
include /etc/nginx/fastcgi_params;
}
location ~ ^/cgi-bin/l/(.*).cgi$ {
ssi off;
gzip off;
fastcgi_pass unix:/run/fcgiwrap.sock;
include /etc/nginx/fastcgi_params;
}
add_header Strict-Transport-Security "max-age=63072000; preload";
add_header Content-Security-Policy "default-src 'self'";
add_header X-Frame-Options DENY;
add_header Access-Control-Allow-Origin https://$server_name;
add_header Vary Origin; # https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Allow-Origin#cors_and_caching
client_max_body_size 100m;
}
```
You can also tune the `WWWDOMAIN` and `NGINXCONFDIR` variable in your `config.mk` to have it generated for you when running `make`.
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