lego

Let's Encrypt client and ACME library written in Go.

Features

Register with CA
Obtain certificates, both from scratch or with an existing CSR
Renew certificates
Revoke certificates
Robust implementation of all ACME challenges
- HTTP (http-01)
- DNS (dns-01)
- TLS (tls-alpn-01)
SAN certificate support
Comes with multiple optional DNS providers
Custom challenge solvers
Certificate bundling
OCSP helper function

lego introduced support for ACME v2 in v1.0.0. If you still need to utilize ACME v1, you can do so by using the v0.5.0 version.

How to install.

Documentation is hosted live at https://go-acme.github.io/lego/.

Detailed documentation is available here.


Alibaba Cloud DNS	Amazon Lightsail	Amazon Route 53	Aurora DNS
Autodns	Azure	Bindman	Bluecat
Checkdomain	CloudDNS	Cloudflare	ClouDNS
CloudXNS	ConoHa	Constellix	Designate DNSaaS for Openstack
Digital Ocean	DNS Made Easy	DNSimple	DNSPod
Domain Offensive (do.de)	DreamHost	Duck DNS	Dyn
Dynu	EasyDNS	Exoscale	External program
FastDNS	Gandi Live DNS (v5)	Gandi	Glesys
Go Daddy	Google Cloud	Hosting.de	HTTP request
Internet Initiative Japan	INWX	Joker	Joohoi's ACME-DNS
Linode (deprecated)	Linode (v4)	Liquid Web	Manual
MyDNS.jp	Name.com	Namecheap	Namesilo
Netcup	NIFCloud	NS1	Open Telekom Cloud
Oracle Cloud	OVH	PowerDNS	Rackspace
reg.ru	RFC2136	RimuHosting	Sakura Cloud
Scaleway	Selectel	Servercow	Stackpath
TransIP	VegaDNS	Versio.[nl/eu/uk]	Vscale
Vultr	Yandex	Zone.ee	Zonomi