When GnuPG refuses to encrypt a message (e.g. when key has expired), record
information about the failure and send to logs, then deliver cleartext. This
way we won't bounce email that could be delivered without encryption.
Also: add more E2E tests.
Add a new test message to verify Lacre's behaviour when processing
UTF-8 messages with text in two different scripts (latin-based and cyrillic).
Also: log Content-Transfer-Encoding when logging headers is enabled.
It's possible to trick Lacre by sending PGP markers in message body, causing
it to classify that message being already encrypted. This test case is used
to reproduce this scenario.
If a user registers their key for address alice@example.com but receives a
message sent to alice+something@example.com, this message should be encrypted
as well.
- Implement delimiter support for GnuPG encryption.
- Add E2E test case for a clear text message delivered to an address with
delimiter.
- Fix minor bug: wrong configuration parameter was retrieved when logging
information about enc_domain_keymap being active.
- Add a new test input message for a new test identity, test scenario
configuration and a test key.
- While retrieving message payload, determine charset based on the
Content-Type header. When missing, default to UTF-8.
- Use more comprehensible variables names.
- Adjust logging levels.
- Use an environment variable to point at the configuration file while
strating gpg-mailgate.py.
- Unify paths: store temporary config, logs and anything else under 'test'
directory.
- Configure more tests (RSA, Ed25519).
- Add test descriptions to be shown before they're started.
