# Home Assistant Add-on: Letsencrypt Let's Encrypt is a certificate authority that provides free X.509 certificates for Transport Layer Security encryption via an automated process designed to eliminate the hitherto complex process of manual creation, validation, signing, installation, and renewal of certificates for secure websites. ![Supports aarch64 Architecture][aarch64-shield] ![Supports amd64 Architecture][amd64-shield] ![Supports armhf Architecture][armhf-shield] ![Supports armv7 Architecture][armv7-shield] ![Supports i386 Architecture][i386-shield] ## About Setting up Letsencrypt allows you to use validated certificates for your webpages and webinterfaces. It requires you to own the domain you are requesting the certificate for. The generated certificate can be used within others addons. By default the path and file for the certificates within other addons will refer to the files generated within this addon. ## Installation Follow these steps to get the add-on installed on your system: 1. Navigate in your Home Assistant frontend to **Supervisor** -> **Add-on Store**. 2. Find the "letsencrypt" add-on and click it. 3. Click on the "INSTALL" button. ## How to use To use this add-on, you have two options on how to get your certificate: ### 1. http challenge - Requires Port 80 to be available from the internet and your domain assigned to the externally assigned IP address - Doesnt allow wildcard certificates (*.yourdomain.com). ### 2. dns challenge - Requires you to use one of the supported DNS providers (See "Supported DNS providers" below) - Allows to request wildcard certificates (*.yourdomain.com) - Doesn’t need you to open a port to your Home Assistant host on your router. ### You always need to provide the following entries within the configuration ```yaml email: your@email.com domains: # use "*.yourdomain.com" for wildcard certificates. - yourdomain.com challenge: http OR dns ``` IF you choose "dns" as "challenge", you will also need to fill: ```yaml # Add the dnsprovider of your choice from the list of "Supported DNS providers" below dnsprovider: "" ``` In addition add the fields according to the credentials required by your dns provider: ```yaml propagation_seconds: 60 cloudflare_email: '' cloudflare_api_key: '' cloudflare_api_token: '' cloudxns_api_key: '' cloudxns_secret_key: '' digitalocean_token: '' dnsimple_token: '' dnsmadeeasy_api_key: '' dnsmadeeasy_secret_key: '' google_creds: '' gehirn_api_token: '' gehirn_api_secret: '' linode_key: '' linode_version: '' luadns_email: '' luadns_token: '' nsone_api_key: '' ovh_endpoint: '' ovh_application_key: '' ovh_application_secret: '' ovh_consumer_key: '' rfc2136_server: '' rfc2136_port: '' rfc2136_name: '' rfc2136_secret: '' rfc2136_algorithm: '' aws_access_key_id: '' aws_secret_access_key: '' sakuracloud_api_token: '' sakuracloud_api_secret: '' netcup_customer_id: '' netcup_api_key: '' netcup_api_password: '' ``` ## Example Configurations ### http challenge ```yaml email: hello@home-assistant.io domains: - home-assistant.io certfile: fullchain.pem keyfile: privkey.pem challenge: http dns: {} ``` ### dns challenge ```yaml email: hello@home-assistant.io domains: - home-assistant.io certfile: fullchain.pem keyfile: privkey.pem challenge: dns dns: provider: dns-cloudflare cloudflare_email: cf@home-assistant.io cloudflare_api_key: 31242lk3j4ljlfdwsjf0 ``` ### google dns challenge ```yaml email: hello@home-assistant.io domains: - home-assistant.io certfile: fullchain.pem keyfile: privkey.pem challenge: dns dns: provider: dns-google google_creds: google.json ``` Please copy your credentials file "google.json" into the "share" shared folder on the Home Assistant host before starting the service. One way is to use the "Samba" add on to make the folder available via network or SSH Add-on. The credential file can be created and downloaded when creating the service user within the Google cloud. You can find additional information in regards to the required permissions in the "credentials" section here: ### CloudFlare Previously, Cloudflare’s “Global API Key” was used for authentication, however this key can access the entire Cloudflare API for all domains in your account, meaning it could cause a lot of damage if leaked. Cloudflare’s newer API Tokens can be restricted to specific domains and operations, and are therefore now the recommended authentication option. However, due to some shortcomings in Cloudflare’s implementation of Tokens, Tokens created for Certbot currently require `Zone:Zone:Read` and `Zone:DNS:Edit` permissions for all zones in your account. Example credentials file using restricted API Token (recommended): ```yaml dns: provider: dns-cloudflare cloudflare_api_token: 0123456789abcdef0123456789abcdef01234 ``` Example credentials file using Global API Key (not recommended): ```yaml dns: provider: dns-cloudflare cloudflare_email: cloudflare@example.com cloudflare_api_key: 0123456789abcdef0123456789abcdef01234 ``` ## Certificate files The certificate files will be available within the "ssl" share after successful request of the certificates. By default other addons are referring to the correct path of the certificates. You can in addition find the files via the "samba" addon within the "ssl" share. ## Supported DNS providers ```txt dns-cloudflare dns-cloudxns dns-digitalocean dns-dnsimple dns-dnsmadeeasy dns-gehirn dns-google dns-linode dns-luadns dns-nsone dns-ovh dns-rfc2136 dns-route53 dns-sakuracloud dns-netcup ``` ## Support Got questions? You have several options to get them answered: - The [Home Assistant Discord Chat Server][discord]. - The Home Assistant [Community Forum][forum]. - Join the [Reddit subreddit][reddit] in [/r/homeassistant][reddit] - Check out certbots page [certbot]. In case you've found a bug, please [open an issue on our GitHub][issue]. [aarch64-shield]: https://img.shields.io/badge/aarch64-yes-green.svg [amd64-shield]: https://img.shields.io/badge/amd64-yes-green.svg [armhf-shield]: https://img.shields.io/badge/armhf-yes-green.svg [armv7-shield]: https://img.shields.io/badge/armv7-yes-green.svg [i386-shield]: https://img.shields.io/badge/i386-yes-green.svg [discord]: https://discord.gg/c5DvZ4e [forum]: https://community.home-assistant.io [issue]: https://github.com/home-assistant/hassio-addons/issues [certbot]: https://certbot.eff.org [reddit]: https://reddit.com/r/homeassistant