Selected the [Botan crypto library](https://github.com/randombit/botan) due to its feature list, maintainer support, availability across all deployment platforms, and ease of use. Also evaluated Crypto++ as a viable candidate, but the additional features of Botan (PKCS#11, TPM, etc) won out.
The random number generator received a backend upgrade. Botan prefers hardware-based RNG's and will provide one if available. This is transparent to KeePassXC and a significant improvement over gcrypt.
Replaced Argon2 library with built-in Botan implementation that supports i, d, and id. This requires Botan 2.11.0 or higher. Also simplified the parameter test across KDF's.
Aligned SymmetricCipher parameters with available modes. All encrypt and decrypt operations are done in-place instead of returning new objects. This allows use of secure vectors in the future with no additional overhead.
Took this opportunity to decouple KeeShare from SSH Agent. Removed leftover code from OpenSSHKey and consolidated the SSH Agent code into the same directory. Removed bcrypt and blowfish inserts since they are provided by Botan.
Additionally simplified KeeShare settings interface by removing raw certificate byte data from the user interface. KeeShare will be further refactored in a future PR.
NOTE: This PR breaks backwards compatibility with KeeShare certificates due to different RSA key storage with Botan. As a result, new "own" certificates will need to be generated and trust re-established.
Removed YKChallengeResponseKeyCLI in favor of just using the original implementation with signal/slots.
Removed TestRandom stub since it was just faking random numbers and not actually using the backend. TestRandomGenerator now uses the actual RNG.
Greatly simplified Secret Service plugin's use of crypto functions with Botan.
* Fixes#3837
* Change objects to use DBusMgr rather than separate adaptors
- Update all DBus invokable methods to new parameter order
- Change all usage of DBusReturn to simpler DBusResult
- Use DBusMgr to handle path and service registration
- Remove adaptor/*
- Set path in DBusObject
- Unregister service when service is destroyed
- Restore handling of invalid QVariant in prompt complete signal
- Clean up meta type registration
- Move dbus related file together
- Convert to QSharedPointer as much as possible
- Fix mapping of the Delete method
- Handle dbus property get all
* Add per-client states
- Move cipher negotiation to DBusClient
- Show list of clients instead of sessions in the settings page
- Add settings for confirmation of accessing items
- Fix infinite recursion when client disconnected
- Use optional explicit DBusClient parameter instead. This makes accessing
the client info in an async context explicit, and thus prevent accidental
assertions in prompts.
* Improve User Interface
- Add per-item access confirmation (if enabled)
- Remove the "disable for site" button for the access control dialog
- Improve the text on the settings page to be more consistent
- Fix disconnect buttons in settings page not working
- Make the unlock prompt method nonblocking
* Fix and cleanup unit tests
- Use QTRY_COMPARE when checking signal spies, as dbus signals are threaded
- Fixes in meta type registration and type conversion
- Remove QStringLiteral in COMPARE macros, making diff output readable
- Add testing for remembering auth decision
- Use completeBaseName rather than baseName to ensure nonempty name
- Handle two databases have the same name
- Cleanup Service::onDatabaseTabOpened logic
