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
Azure	Bluecat	Cloudflare	ClouDNS
CloudXNS	ConoHa	Designate DNSaaS for Openstack	Digital Ocean
DNS Made Easy	DNSimple	DNSPod	Domain Offensive (do.de)
DreamHost	Duck DNS	Dyn	Exoscale
External program	FastDNS	Gandi Live DNS (v5)	Gandi
Glesys	Go Daddy	Google Cloud	Hosting.de
HTTP request	Internet Initiative Japan	INWX	Joohoi's ACME-DNS
Linode (deprecated)	Linode (v4)	Manual	MyDNS.jp
Name.com	Namecheap	Netcup	NIFCloud
NS1	Open Telekom Cloud	Oracle Cloud	OVH
PowerDNS	Rackspace	RFC2136	Sakura Cloud
Selectel	Stackpath	TransIP	VegaDNS
Vscale	Vultr	Zone.ee