lers

An async, user-friendly Let's Encrypt/ACMEv2 library written in Rust.

The API and implementation were inspired by acme2, acme-micro, and lego.

Features

• ACME v2 (RFC 8555)
• Register with CA
• Obtain certificates
• Robust implementation of ACME challenges
  • HTTP (http-01)
  • DNS (dns-01)
• SAN certificate support
• Custom challenge solvers (Solver trait)

Missing features

• Certificate renewal
• Certificate revocation
• TLS-ALPN-01 challenge implementation
• Certificate bundling
• External account binding

Contributions are welcome for any of the above features.

Supported DNS-01 Providers

Currently, the following providers are supported:

• Cloudflare: CloudflareDns01Solver