GetCertificate has all the information it needs to know if a client
supports ECDSA in ClientHelloInfo. Deprecate and ignore ForceRSA, and
just obtain a RSA certificate on the fly when a client that doesn't
support ECDSA connects.
This changes the cache key format to have a "+rsa" suffix for RSA
certificates. The default (ForceRSA = false) cache key is unchanged,
so most DirCache instances will still be valid. Caches created with
ForceRSA set will be silently ignored and certificates reissued.
The cache keys for HTTP tokens and the account key are changed to be
guaranteed not to overlap with valid domain names as well.
Note that ECDSA support detection is more strict in following RFC 5246
than crypto/tls, which ignores signature_algorithms.
Fixesgolang/go#22066
Change-Id: I70227747b563d6849cb693f83a950d57040b3f39
Reviewed-on: https://go-review.googlesource.com/114501
Reviewed-by: Adam Langley <agl@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
The standard library context package has been available since Go 1.7,
and the Go build dashboard (build.golang.org) only tests master and
the past two releases.
Also, the acme package makes no backwards compatibility guarantees,
not that I expect this to influence many people.
Change-Id: Ia1a294212e1e531f28f53cd954d4743a64611cab
Reviewed-on: https://go-review.googlesource.com/39272
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Alex Vaghin <ddos@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Package autocert provides automatic access to certificates
from Let's Encrypt and any other ACME-based CA.
It is heavily based on the ideas from rsc.io/letsencrypt.
Change-Id: I62021452a918cd49093162f3d6c74e9d7f452fb8
Reviewed-on: https://go-review.googlesource.com/23970
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>