acme: fix TLSALPN01ChallengeCert for IP address identifiers

When creating a TLS-ALPN-01 challenge response certificate for an IP
address identifier we need to configure the template IPAddresses field,
not the DNSNames/Subject.CommonName.

Along the way we can do some small tidying:
* Updating the draft TLS-ALPN-01 reference to the finalized RFC
* Adding a reference to the IP address identifier ACME RFC
* Adding a mention of the form the challenge validation request's SNI
  will take when verifying an IP address identifier
* Tidying the private tlsChallengeCert() function to take a single
  identifier as arg since the only call-sites provide singular values
  since the removal of the TLS-SNI-[01|02] challenge helpers.

This allows enabling an IP address identifier in the Pebble integration
tests that otherwise caused a validation failure for TLS-ALPN-01
challenge types because the IP address was used as a DNS SAN.

Updates golang/go#73914

Cq-Include-Trybots: luci.golang.try:x_crypto-gotip-linux-amd64-longtest
Change-Id: Ic671e41b585f424f821db65206c7ffcc6dd386a0
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/677576
Reviewed-by: Ian Stapleton Cordasco <graffatcolmingov@gmail.com>
Auto-Submit: Daniel McCarney <daniel@binaryparadox.net>
Reviewed-by: Roland Shoemaker <roland@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
3 files changed
tree: 50806636e98d63e38aa2f8f2249b3b1c26671787
  1. acme/
  2. argon2/
  3. bcrypt/
  4. blake2b/
  5. blake2s/
  6. blowfish/
  7. bn256/
  8. cast5/
  9. chacha20/
  10. chacha20poly1305/
  11. cryptobyte/
  12. curve25519/
  13. ed25519/
  14. hkdf/
  15. internal/
  16. md4/
  17. nacl/
  18. ocsp/
  19. openpgp/
  20. otr/
  21. pbkdf2/
  22. pkcs12/
  23. poly1305/
  24. ripemd160/
  25. salsa20/
  26. scrypt/
  27. sha3/
  28. ssh/
  29. tea/
  30. twofish/
  31. x509roots/
  32. xtea/
  33. xts/
  34. .gitattributes
  35. .gitignore
  36. codereview.cfg
  37. CONTRIBUTING.md
  38. go.mod
  39. go.sum
  40. LICENSE
  41. PATENTS
  42. README.md
README.md

Go Cryptography

Go Reference

This repository holds supplementary Go cryptography packages.

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This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://go.dev/doc/contribute.

The git repository is https://go.googlesource.com/crypto.

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