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handle scram errors more gracefully, not aborting the connection

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for some errors during the scram authentication protocol, we would treat some
errors that a client connection could induce as server errors, printing a stack
trace and aborting the connection.

this change recognizes those errors and sends regular "authentication failed"
or "protocol error" error messages to the client.

for issue #222 by wneessen, thanks for reporting
This commit is contained in:
Mechiel Lukkien
2024-10-03 15:18:09 +02:00
parent b0c4b09010
commit c7315cb72d
4 changed files with 25 additions and 9 deletions
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2
metrics/auth.go
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@ -16,7 +16,7 @@ var (
"kind", // submission, imap, webmail, webapi, webaccount, webadmin (formerly httpaccount, httpadmin)
"variant", // login, plain, scram-sha-256, scram-sha-1, cram-md5, weblogin, websessionuse, httpbasic.
// todo: we currently only use badcreds, but known baduser can be helpful
"result", // ok, baduser, badpassword, badcreds, error, aborted
"result", // ok, baduser, badpassword, badcreds, badchanbind, error, aborted
},
)