From c42f3a37729ed771308fd6e2cdc384376d2966fd Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Tue, 18 Jul 2023 10:38:15 +0200
Subject: ircsink: wait for SASL to finish via numerics
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Because per [sasl-3.1] The final “text” parameter is not to be
machine-parsed.  Additionally, only continue on RPL_SASLSUCCESS
and abort otherwise.

[sasl-3.1]: https://ircv3.net/specs/extensions/sasl-3.1
---
 bin/ircsink | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'bin/ircsink')

diff --git a/bin/ircsink b/bin/ircsink
index dcbe294..c81f1a2 100755
--- a/bin/ircsink
+++ b/bin/ircsink
@@ -222,7 +222,15 @@ main() {(
         echo "AUTHENTICATE $message"
         echo "AUTHENTICATE ***REDACTED***" >&2
 
-        sed -nru '/^(.*?):SASL authentication successful/q'
+        # wait for SASL to finish
+        #   RPL_SASLSUCCESS (903)
+        #   ERR_SASLFAIL (904)
+        #   ERR_SASLTOOLONG (905)
+        sasl_result=$(sed -nru 's/^:[^ ]* (90[345]) .*/\1/p;T;q')
+        if test $sasl_result -ne 903; then
+          echo "$0: error: SASL authentication failed" >&2
+          exit 1
+        fi
         ;;
     esac
 
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