A new extension to the ACME protocol is proposed to support device attestation: https://datatracker.ietf.org/doc/draft-acme-device-attest/ Based on the recent IETF meetings, the proposal is likely to be accepted. To support the new extension, the ACME client will need to send a non-empty JSON body in the response to a "device-attest-01" challenge. Fixes golang/go#68674 Change-Id: I29b420ec837f682e3d59071a4a82af56dc319134 Reviewed-on: https://go-review.googlesource.com/c/crypto/+/608975 Reviewed-by: Roland Shoemaker <roland@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Auto-Submit: Roland Shoemaker <roland@golang.org>