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.

Installation

How to install.

Usage

• as a CLI
• as a library

Documentation

Documentation is hosted live at https://go-acme.github.io/lego/.

DNS providers

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	Scaleway
Selectel	Stackpath	TransIP	VegaDNS
Vscale	Versio	Vultr	Zone.ee