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	deSEC.io
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	MythicBeasts	Name.com
Namecheap	Namesilo	Netcup	Netlify
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