# 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).

<!-- START DNS PROVIDERS LIST -->

|                                                                                 |                                                                                 |                                                                                 |                                                                                 |
|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------|
| [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/)                  | [CloudDNS](https://go-acme.github.io/lego/dns/clouddns/)                        | [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/)                            | [Constellix](https://go-acme.github.io/lego/dns/constellix/)                    | [deSEC.io](https://go-acme.github.io/lego/dns/desec/)                           |
| [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/)                                  | [Dynu](https://go-acme.github.io/lego/dns/dynu/)                                | [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/)                      | [Hetzner](https://go-acme.github.io/lego/dns/hetzner/)                          |
| [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/)                     | [LuaDNS](https://go-acme.github.io/lego/dns/luadns/)                            | [Manual](https://go-acme.github.io/lego/dns/manual/)                            | [MyDNS.jp](https://go-acme.github.io/lego/dns/mydnsjp/)                         |
| [MythicBeasts](https://go-acme.github.io/lego/dns/mythicbeasts/)                | [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/)                            | [Netlify](https://go-acme.github.io/lego/dns/netlify/)                          | [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/)                      | [reg.ru](https://go-acme.github.io/lego/dns/regru/)                             | [RFC2136](https://go-acme.github.io/lego/dns/rfc2136/)                          | [RimuHosting](https://go-acme.github.io/lego/dns/rimuhosting/)                  |
| [Sakura Cloud](https://go-acme.github.io/lego/dns/sakuracloud/)                 | [Scaleway](https://go-acme.github.io/lego/dns/scaleway/)                        | [Selectel](https://go-acme.github.io/lego/dns/selectel/)                        | [Servercow](https://go-acme.github.io/lego/dns/servercow/)                      |
| [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/)                          | [Versio.[nl/eu/uk]](https://go-acme.github.io/lego/dns/versio/)                 |
| [Vscale](https://go-acme.github.io/lego/dns/vscale/)                            | [Vultr](https://go-acme.github.io/lego/dns/vultr/)                              | [Yandex](https://go-acme.github.io/lego/dns/yandex/)                            | [Zone.ee](https://go-acme.github.io/lego/dns/zoneee/)                           |
| [Zonomi](https://go-acme.github.io/lego/dns/zonomi/)                            |                                                                                 |                                                                                 |                                                                                 |

<!-- END DNS PROVIDERS LIST -->