lego/docs/content/_index.md

title	date	draft	chapter
Welcome	2019-03-03T16:39:46+01:00	false	true

Lego

Let's Encrypt client and ACME library written in Go.

Features

• ACME v2 RFC 8555
  • Support RFC 8737: TLS Application‑Layer Protocol Negotiation (ALPN) Challenge Extension
  • Support RFC 8738: issues certificates for IP addresses
  • Support draft-ietf-acme-ari-01: Renewal Information (ARI) Extension
• 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
• CNAME support by default
• Comes with multiple optional [DNS providers]({{< ref "dns" >}})
• [Custom challenge solvers]({{< ref "usage/library/Writing-a-Challenge-Solver" >}})
• Certificate bundling
• OCSP helper function