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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 but wasn't really
interested in the multi-user perspective and managing a database.
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 for the moment.
Dependencies
============
You will need perl and the following modules and my perl version is **v5.34.0**, YMMV:
* HTML::Entities
* CGI
* CGI::Carp
* CGI::Cookies
* Crypt::Argon2
* GPG
* Net:SSLeay
* Net::SMTP
* Net::SMTPS
* Email::Valid
* String::Random
Having a webserver with CGI support or a separate CGI engine is needed. I'm using
nginx and fcgiwrap.
A note on **Net::SMTP** and **Net:SMTPS** dependencies: if you have a mailserver well
configured with SPF and OpenDKIM (so your chances to get your mail
treated as spam is greatly reduced) you should set the `HAS_MAILSERVER`
variable in
[link-tmpl.cgi](https://git.les-miquelots.net/gpigeon/plain/link-tmpl.cgi) to 1.
Installation
============
Don't forget to copy `config.def.mk` into `config.mk` and tune
the variable to your liking. Then, you can run the good old:
```
make
make install #you'll maybe need sudo though
```
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:
```
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;
include /etc/nginx/hotlinking.conf;
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;
}
include errorpages.conf;
}
```
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