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sasl: fix zero-length response encoding

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A sasl zero-length normal response is an empty string, unlike an initial
response. Since the encoding of a zero-length initial response is
protocol dependent, move its handling to the protocol-specific sendauth
procedure. Similarly, do not check for an '=' server message, as this
should normally never occur.

Update the erroneous tests accordingly.

Closes #22218
This commit is contained in:
Patrick Monnerat 2026-06-29 18:17:14 +02:00 • committed by Daniel Stenberg
parent bedeeaa4a7
commit f02c53361e
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7 changed files with 14 additions and 13 deletions
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4
tests/data/test838
View file

@ -14,7 +14,7 @@ RFC4422
<servercmd>
AUTH EXTERNAL
REPLY AUTHENTICATE +
REPLY = A002 OK AUTHENTICATE completed
REPLY A002 OK AUTHENTICATE completed
</servercmd>
<data crlf="yes">
From: me@somewhere
@ -45,7 +45,7 @@ IMAP external authentication without credentials
<protocol crlf="yes">
A001 CAPABILITY
A002 AUTHENTICATE EXTERNAL
=
A003 SELECT %TESTNUMBER
A004 FETCH 1 BODY[]
A005 LOGOUT

4
tests/data/test884
View file

@ -16,7 +16,7 @@ RFC5034
<servercmd>
AUTH EXTERNAL
REPLY AUTH +
REPLY = +OK Login successful
REPLY +OK Login successful
</servercmd>
<data crlf="yes">
From: me@somewhere
@ -47,7 +47,7 @@ POP3 external authentication without credentials
<protocol crlf="yes">
CAPA
AUTH EXTERNAL
=
RETR %TESTNUMBER
QUIT
</protocol>

4
tests/data/test943
View file

@ -15,7 +15,7 @@ RFC4954
<servercmd>
AUTH EXTERNAL
REPLY AUTH 334 EXTERNAL supported
REPLY = 235 Authenticated
REPLY 235 Authenticated
</servercmd>
</reply>
@ -40,7 +40,7 @@ mail body
<protocol crlf="yes">
EHLO %TESTNUMBER
AUTH EXTERNAL
=
MAIL FROM:%LTsender@example.com%GT
RCPT TO:%LTrecipient@example.com%GT
DATA