Re: [Acme] Survey of draft-07 implementations

[Mads Egil Henriksveen <[e-mail]>]

Hi

Buypass has implemented an ACME server based on ACME draft-07 which use order based issuance, this version is currently available in a test environment only. We are also running a constrained pilot in our production environment (supporting CertBot) and this will be upgraded to the ACME draft-07 version shortly.

We have included support for Pre-Authorization, but we are not using neither External Account Binding nor the Out-of-Band Challenge in our current version. However, we are considering to use the Out-of-Band Challenge type and possibly also External Account Binding in a next phase where the idea is to exploit how the ACME protocol may be used to support issuance and administration of other types of TLS certificates than DV.

Regards
Mads

From: Acme [mailto:[e-mail]] On Behalf Of Daniel McCarney
Sent: fredag 20. oktober 2017 22:36
To: IETF ACME <[e-mail]>
Subject: [Acme] Survey of draft-07 implementations

Hi folks,

As the WG approaches last-call on ACME draft-07[0] I wanted to get a sense of which portions of the spec have been implemented and which haven't.

In particular I'd like to hear if anyone has implemented:
* External Account Binding (Section 7.3.5)
* Pre-Authorization for Order based issuance (Section 7.4.1)
* The Out-of-Band Challenge type (Section 8.6)

Let's Encrypt has made good progress on draft-07 server implementation but has no plans to implement the above three features. It would be nice to hear someone has running code for these protions of spec.

Ignoring the above three items Let's Encrypt has implemented the core portions of draft-07 in Pebble[1]. It's presently using the pro-active issuance method described in draft-07. It does not support key change or revocation but is ready to be used by clients. There is an integration test client[2] based on Certbot's ACME python module and ACME4j has an experimental branch[3] capable of issuing certificates from Pebble.

Let's Encrypt has also made significant progress implementing draft-07 in Boulder[4], the production Let's Encrypt CA software, but it is not yet ready for use by clients. This implementation does include key change and revocation but does **not** use pro-active issuance. I began a separate thread[5] for the order finalization approach that we have started to implement for Boulder. Pebble will be updated to use this issuance approach in place of pro-active issuance shortly.

Are there any other servers or clients out there that are speaking draft-07 ACME and using order based issuance?

- Daniel / cpu

[0]: https://tools.ietf.org/html/draft-ietf-acme-acme-07
[1]: https://github.com/letsencrypt/pebble
[2]: https://github.com/letsencrypt/boulder/blob/e2cc6fbe682dd5d49da32c2357838b0cc831f10f/test/chisel2.py
[3]: https://github.com/shred/acme4j/tree/draft
[4]: https://github.com/letsencrypt/boulder
[5]: https://mailarchive.ietf.org/arch/msg/acme/DIjJEB06J5cFyuOlGPVcY2I51vg