ACME protocol reference

This is a general description of the ACME protocol for STIR/SHAKEN ACME servers. For the comprehensive reference see RFC 8555 and ATIS-1000080 v4.

The steps, required to issue a new STIR/SHAKEN certificate for Service Providers (SP), are:

1. List ACME server directory

2. Acquire nonce

3. Authorize on the server; Ensure that the account is active

4. Place a new order

5. Get challenge

6. Submit challenge response

7. Upload CSR

8. Download certificate