🔒⚗️ Add experimental SASL::ClientAdapter #183
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_The API is **experimental.**_ TODO: catch exceptions in #process and send #cancel_string. TODO: raise an error if the command succeeds after being canceled. TODO: use with more clients, to verify the API can accommodate them. An abstract base class for executing a SASL authentication exchange for a client. Subclasses works as an adapter for a protocol and a client implementation of that protocol. Call `#authenticate` to execute an authentication exchange for `#client` using `#authenticator`. Authentication failures will raise an exception. Any exceptions other than those in RESPONSE_ERRORs will also drop the connection. Methods for subclasses to override are all documented as `protected`. At the very least, subclasses must provide an override (or a block) for `#send_command_with_continuations`. Client-specific overrides may also be needed for `RESPONSE_ERRORS`, `#supports_initial_response?`, `#supports_mechanism?`, `#handle_incomplete`, or `#drop_connection`.
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This PR has been updated to only create the SASL::ClientAdapter. Actually using it has been pushed off until later (#194). So I see this PR as very low risk. On the other hand, I have been using this code from other projects and I would like to submit PRs to some of them. And that will be greatly simplified once it is in a released gem. |
This was referenced Oct 15, 2023
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This adds some complexity over the IMAP implementation, but it simplifies sharing the implementation between
net-imap,net-smtp, and hopefully many others in the future.SASL.initial_response?andSASL.done?have been removed without deprecation (they haven't been in any release yet). The logic has been moved intoSASL::ClientAdapter.#initial_response?was added to the deprecated authenticators. It isn't required that authenticators implement this method, but it simplifies the tests, now thatSASL.initial_response?is gone.This PR has been updated to only create the SASL::ClientAdapter. Actually using it has been pushed off until a later PR: #194.