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# ![lego](./docs/static/images/logo.png)
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Let's Encrypt client and ACME library written in Go.
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[![GoDoc ](https://godoc.org/github.com/go-acme/lego?status.svg )](https://pkg.go.dev/mod/github.com/go-acme/lego/v4)
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[![Build Status ](https://travis-ci.com/go-acme/lego.svg?branch=master )](https://travis-ci.com/go-acme/lego)
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[![Docker Pulls ](https://img.shields.io/docker/pulls/goacme/lego.svg )](https://hub.docker.com/r/goacme/lego/)
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## Features
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- Register with CA
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- Obtain certificates, both from scratch or with an existing CSR
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- Renew certificates
- Revoke certificates
- Robust implementation of all ACME challenges
- HTTP (http-01)
- DNS (dns-01)
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- TLS (tls-alpn-01)
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- SAN certificate support
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- Comes with multiple optional [DNS providers ](https://go-acme.github.io/lego/dns )
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- [Custom challenge solvers ](https://go-acme.github.io/lego/usage/library/writing-a-challenge-solver/ )
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- Certificate bundling
- OCSP helper function
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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.
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## Installation
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How to [install ](https://go-acme.github.io/lego/installation/ ).
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## Usage
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- as a [CLI ](https://go-acme.github.io/lego/usage/cli )
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- as a [library ](https://go-acme.github.io/lego/usage/library )
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## Documentation
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Documentation is hosted live at https://go-acme.github.io/lego/.
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## DNS providers
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Detailed documentation is available [here ](https://go-acme.github.io/lego/dns ).
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<!-- START DNS PROVIDERS LIST -->
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| | | | |
|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------|---------------------------------------------------------------------------------|
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| [Akamai EdgeDNS ](https://go-acme.github.io/lego/dns/edgedns/ ) | [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/ ) |
| [ArvanCloud ](https://go-acme.github.io/lego/dns/arvancloud/ ) | [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/ ) |
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| [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/ ) | [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/ ) | [HyperOne ](https://go-acme.github.io/lego/dns/hyperone/ ) |
| [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 (v4) ](https://go-acme.github.io/lego/dns/linode/ ) | [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/ ) | | |
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<!-- END DNS PROVIDERS LIST -->