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Document authentication sequence

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Arnaud Cogoluègnes 2020-05-25 17:53:34 +02:00
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deps/rabbitmq_stream/docs/PROTOCOL.adoc vendored
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@ -364,3 +364,43 @@ Delete => Key Version CorrelationId Stream
CorrelationId => int32
Stream => string
```
== Authentication
Once a client is connected to the server, it initiates an authentication
sequence. The next figure shows the steps of the sequence:
[ditaa]
.Authentication Sequence
....
Client Server
+ +
| SASL Handshake |
|-------------------------->|
|<--------------------------|
| |
| SASL Authenticate |
|-------------------------->|
|<--------------------------|
| |
| Tune |
|<--------------------------|
|-------------------------->|
| |
| Open |
|-------------------------->|
|<--------------------------|
| |
+ +
....
* SaslHandshake: the client asks about the SASL mechanisms the server supports. It
can then pick one from the list the server returns.
* SaslAuthenticate: the client answers to the server's challenge(s), using the
SASL mechanism it picked. The server will send a `Tune` frame once it is satisfied
with the client authentication response.
* Tune: the server sends a `Tune` to suggest some settings (max frame size, heartbeat).
The client answers with a `Tune` with the settings he agrees on, possibly adjusted
from the server's suggestion.
* Open: the client sends a `Open` frame to pick a virtual host to connect. The server
answers whether it accepts the access or not.