For acme-tiny, we just run the same procedure as getting a new
certificate. You can even use the same CSR as before.
POST /acme/new-authz (request new challenges for the domain)
POST /path/to/challenge (notify of challenges met)
GET /path/to/challenge (wait for the challenge to turn valid)
...repeat as needed for multiple domains
POST /acme/new-cert (get a signed cert)
On Mon, Feb 15, 2016 at 7:00 AM, Kaiduan Xie <kaiduanx@xxxxxxxxx> wrote:
What is the protocol/procedure used under the hood to renew a Letsencrypt
certificate? I obtained an Letsencrypt certificate on Dec of 2015 with my
own client (not the Python client provided by Letsencrypt), the certificate
is going to expire soon.