tree de2ffa8a93aeb08c5923bf1cf02f7175f1062473
parent 2afe7c4bde1bf8be2ca50c448b6b8142970faf3e
author Alex Vaghin <alex@cloudware.io> 1566342223 +0200
committer Alex Vaghin <ddos@google.com> 1569497097 +0000

acme: fetch fresh nonces from newNonce resource

Previously, nonce values were fetched from Directory URL.
RFC8555 and some recent drafts provide specific URL to fetch
new nonce values from.

This CL makes the client always use new nonce URL when available
and fall back to the previous behavior otherwise.

Updates golang/go#21081

Change-Id: I6442004b01d46aa015c193ca4c80daa712b78790
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/191603
Run-TryBot: Alex Vaghin <ddos@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>