Title: Set up your own CalDAV and CardDAV servers on OpenBSD

	Title: Set up your own CalDAV and CardDAV servers on OpenBSD
	Author: Solène
	Date: 23 April 2023
	Tags: caldav carddav openbsd selfhosting
	Description: In this tutorial, you will learn how to install radicale
	on OpenBSD to self host your own calendar and contacts server

	# Introduction

	Calendar and contacts syncing, it's something I pushed away for too
	long, but when I've lost data on my phone and my contacts with it,
	setting up a local CalDAV/CardDAV server is the first thing I did.

	Today, I'll like to show you how to set up the server radicale to have
	your own server.

	Radicale official project page

	Basically, CalDAV (for calendars and to-do lists) and CardDAV (for
	contacts) are exchange protocols to sync contacs and calendars between
	devices.

	# Setup

	On OpenBSD 7.3, the latest version of radicale is radicale 2, available
	as a package with all the service files required for a quick and
	efficient setup.

	You can install radicale with the following command:

	```shell
	# pkg_add radicale
	```

	After installation, you will have to edit the file
	`/etc/radicale/config` in order to make a few changes. The syntax
	looks like INI files with sections between brakets and then key/values
	on separate lines.

	For my setup, I made my radicale server to listen on the IP
	`10.42.42.42` and port `5232`, and I chose to use htpasswd files
	encrypted in bcrypt to manage users. This was accomplished with the
	following piece of configuration:

	```ini
	[server]
	hosts = 10.42.42.42:5232

	[auth]
	type = htpasswd
	htpasswd_filename = /etc/radicale/users
	htpasswd_encryption = bcrypt
	```

	After saving the changes, you need to generate the file
	`/etc/radicale/users` to add credentials and password in it, this is
	done using the command `htpasswd`.

	In order to add the user `solene` to the file, use the following
	command:

	```shell
	# cd /etc/radicale
	# htpaswd users solene
	# chown _radicale /etc/radicale/users
	```

	Now everything is ready, you can enable radicale to run at boot, and
	start it now, using `rcctl` to manage the service like in:

	```
	# rcctl enable radicale
	# rcctl start radicale
	```

	# Managing calendars and contacts

	Now you should be able to reach radicale on the address it's listening,
	in my example it's http://10.42.42.42:5232/ and use your credentials to
	log in.

	Then, just click on the link "Create new addressbook or calendar", and
	complete the form.

	Back on the index, you will see each item managed by radicale and the
	URL to access it. When you will configure your devices to use CalDAV
	and CardDAV, you will need the crendentials and the URL.

	# Conclusion

	Radicale is very lightweight and super easy to configure, and I finally
	have a proper calendar synchronization on my computers and smartphone,
	which turned to be very practical.

	# Going further

	If you want to setup HTTPS for radicale, you can either use a
	certificate file and configure radicale to use it, or use a reverse
	http proxy such as nginx and handle the certificate there.