# lego Let's Encrypt client and ACME library written in Go. [![GoDoc](https://godoc.org/github.com/go-acme/lego?status.svg)](https://godoc.org/github.com/go-acme/lego/acme) [![Build Status](https://travis-ci.com/go-acme/lego.svg?branch=master)](https://travis-ci.com/go-acme/lego) [![Docker Pulls](https://img.shields.io/docker/pulls/goacme/lego.svg)](https://hub.docker.com/r/goacme/lego/) ## 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](https://go-acme.github.io/lego/dns) - [Custom challenge solvers](https://go-acme.github.io/lego/usage/library/writing-a-challenge-solver/) - Certificate bundling - OCSP helper function lego introduced support for ACME v2 in [v1.0.0](https://github.com/go-acme/lego/releases/tag/v1.0.0). If you still need to utilize ACME v1, you can do so by using the [v0.5.0](https://github.com/go-acme/lego/releases/tag/v0.5.0) version. ## Installation How to [install](https://go-acme.github.io/lego/installation/). ## Usage - as a [CLI](https://go-acme.github.io/lego/usage/cli) - as a [library](https://go-acme.github.io/lego/usage/library) ## Documentation Documentation is hosted live at https://go-acme.github.io/lego/. ## DNS providers Detailed documentation is available [here](https://go-acme.github.io/lego/dns). | | | | | |---------------------------------------------------------------------------------|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------| | [Alibaba Cloud DNS](https://go-acme.github.io/lego/dns/alidns/) | [Amazon Lightsail](https://go-acme.github.io/lego/dns/lightsail/) | [Amazon Route 53](https://go-acme.github.io/lego/dns/route53/) | [Aurora DNS](https://go-acme.github.io/lego/dns/auroradns/) | | [Autodns](https://go-acme.github.io/lego/dns/autodns/) | [Azure](https://go-acme.github.io/lego/dns/azure/) | [Bindman](https://go-acme.github.io/lego/dns/bindman/) | [Bluecat](https://go-acme.github.io/lego/dns/bluecat/) | | [Checkdomain](https://go-acme.github.io/lego/dns/checkdomain/) | [Cloudflare](https://go-acme.github.io/lego/dns/cloudflare/) | [ClouDNS](https://go-acme.github.io/lego/dns/cloudns/) | [CloudXNS](https://go-acme.github.io/lego/dns/cloudxns/) | | [ConoHa](https://go-acme.github.io/lego/dns/conoha/) | [Designate DNSaaS for Openstack](https://go-acme.github.io/lego/dns/designate/) | [Digital Ocean](https://go-acme.github.io/lego/dns/digitalocean/) | [DNS Made Easy](https://go-acme.github.io/lego/dns/dnsmadeeasy/) | | [DNSimple](https://go-acme.github.io/lego/dns/dnsimple/) | [DNSPod](https://go-acme.github.io/lego/dns/dnspod/) | [Domain Offensive (do.de)](https://go-acme.github.io/lego/dns/dode/) | [DreamHost](https://go-acme.github.io/lego/dns/dreamhost/) | | [Duck DNS](https://go-acme.github.io/lego/dns/duckdns/) | [Dyn](https://go-acme.github.io/lego/dns/dyn/) | [EasyDNS](https://go-acme.github.io/lego/dns/easydns/) | [Exoscale](https://go-acme.github.io/lego/dns/exoscale/) | | [External program](https://go-acme.github.io/lego/dns/exec/) | [FastDNS](https://go-acme.github.io/lego/dns/fastdns/) | [Gandi Live DNS (v5)](https://go-acme.github.io/lego/dns/gandiv5/) | [Gandi](https://go-acme.github.io/lego/dns/gandi/) | | [Glesys](https://go-acme.github.io/lego/dns/glesys/) | [Go Daddy](https://go-acme.github.io/lego/dns/godaddy/) | [Google Cloud](https://go-acme.github.io/lego/dns/gcloud/) | [Hosting.de](https://go-acme.github.io/lego/dns/hostingde/) | | [HTTP request](https://go-acme.github.io/lego/dns/httpreq/) | [Internet Initiative Japan](https://go-acme.github.io/lego/dns/iij/) | [INWX](https://go-acme.github.io/lego/dns/inwx/) | [Joker](https://go-acme.github.io/lego/dns/joker/) | | [Joohoi's ACME-DNS](https://go-acme.github.io/lego/dns/acme-dns) | [Linode (deprecated)](https://go-acme.github.io/lego/dns/linode/) | [Linode (v4)](https://go-acme.github.io/lego/dns/linodev4/) | [Liquid Web](https://go-acme.github.io/lego/dns/liquidweb/) | | [Manual](https://go-acme.github.io/lego/dns/manual/) | [MyDNS.jp](https://go-acme.github.io/lego/dns/mydnsjp/) | [Name.com](https://go-acme.github.io/lego/dns/namedotcom/) | [Namecheap](https://go-acme.github.io/lego/dns/namecheap/) | | [Namesilo](https://go-acme.github.io/lego/dns/namesilo/) | [Netcup](https://go-acme.github.io/lego/dns/netcup/) | [NIFCloud](https://go-acme.github.io/lego/dns/nifcloud/) | [NS1](https://go-acme.github.io/lego/dns/ns1/) | | [Open Telekom Cloud](https://go-acme.github.io/lego/dns/otc/) | [Oracle Cloud](https://go-acme.github.io/lego/dns/oraclecloud/) | [OVH](https://go-acme.github.io/lego/dns/ovh/) | [PowerDNS](https://go-acme.github.io/lego/dns/pdns/) | | [Rackspace](https://go-acme.github.io/lego/dns/rackspace/) | [RFC2136](https://go-acme.github.io/lego/dns/rfc2136/) | [Sakura Cloud](https://go-acme.github.io/lego/dns/sakuracloud/) | [Selectel](https://go-acme.github.io/lego/dns/selectel/) | | [Stackpath](https://go-acme.github.io/lego/dns/stackpath/) | [TransIP](https://go-acme.github.io/lego/dns/transip/) | [VegaDNS](https://go-acme.github.io/lego/dns/vegadns/) | [Vscale](https://go-acme.github.io/lego/dns/vscale/) | | [Versio](https://go-acme.github.io/lego/dns/versio/) | [Vultr](https://go-acme.github.io/lego/dns/vultr/) | [Zone.ee](https://go-acme.github.io/lego/dns/zoneee/) | |