Dehydrated is a client for signing certificates with an ACME-server (currently only provided by Let’s Encrypt) implemented as a relatively simple bash-script.

It uses the openssl utility for everything related to actually handling keys and certificates, so you need to have that installed.

Other dependencies are: cURL, sed, grep, mktemp (all found on almost any system, cURL being the only exception)

Current features:

  • Signing of a list of domains
  • Signing of a CSR
  • Renewal if a certificate is about to expire or SAN (subdomains) changed
  • Certificate revocation

Please keep in mind that this software and even the acme-protocol are relatively young and may still have some unresolved issues. Feel free to report any issues you find with this script or contribute by submitting a pull request.