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