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	Bindman	Bluecat	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)	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