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	Cloudflare	ClouDNS	CloudXNS
ConoHa	Designate DNSaaS for Openstack	Digital Ocean	DNS Made Easy
DNSimple	DNSPod	Domain Offensive (do.de)	DreamHost
Duck DNS	Dyn	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	RFC2136	Sakura Cloud	Selectel
Stackpath	TransIP	VegaDNS	Vscale
Versio	Vultr	Zone.ee