This replaces the old OpenPGPv4 key that is used in the test suite
with a more modern OpenPGPv4 key. All cryptographic artifacts in the
test suite are updated accordingly.
Having old cryptographic artifacts in the test suite presents a
problem once the old algorithms are rejected by contemporary
implementations.
For reference, this is the old key.
sec rsa1024 2011-02-05 [SC]
5AEAB11F5E33DCE875DDB75B6D92612D94E46381
uid [ unknown] Notmuch Test Suite <test_suite@notmuchmail.org> (INSECURE!)
ssb rsa1024 2011-02-05 [E]
And this is the new key. Note that is has the same shape, but uses
Ed25519 and Cv25519 instead of 1024-bit RSA.
sec ed25519 2022-09-07 [SC]
9A3AFE6C60065A148FD4B58A7E6ABE924645CC60
uid [ultimate] Notmuch Test Suite (INSECURE!) <test_suite@notmuchmail.org>
ssb cv25519 2022-09-07 [E]
Up to this point, we've tested protected headers on messages that have
either been encrypted or signed, but not both.
This adds a couple tests of signed+encrypted messages, one where the
subject line is masked (outside subject line is "Subject Unavailable")
and another where it is not (outside Subject: matches inner Subject:)
See the discussion at
https://dkg.fifthhorseman.net/blog/e-mail-cryptography.html#protected-headers
for more details about the nuances between signed, stripped, and
stubbed headers.
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
