From 37753409dc55da1a1cc3feed139f287a2d6215bb Mon Sep 17 00:00:00 2001
From: xengineering <me@xengineering.eu>
Date: Sun, 21 May 2023 13:00:58 +0200
Subject: Implement SASL method parsing

---
 xmpp/routing.go | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

(limited to 'xmpp/routing.go')

diff --git a/xmpp/routing.go b/xmpp/routing.go
index 34136f4..55ec135 100644
--- a/xmpp/routing.go
+++ b/xmpp/routing.go
@@ -95,7 +95,35 @@ type elementRoutingTable []struct {
 }
 
 func streamFeatures(b []xml.Token) error {
-	log.Println("Received stream features")
+	err := sendSaslAuth(b)
+	if err != nil {
+		return err
+	}
 
 	return nil
 }
+
+func sendSaslAuth(b []xml.Token) error {
+	mechanisms := make([]string, 0)
+	for i, v := range(b) {
+		switch token := v.(type) {
+		case xml.StartElement:
+			expected := xml.Name{"urn:ietf:params:xml:ns:xmpp-sasl", "mechanism"}
+			if token.Name == expected {
+				if i >= (len(b)-1) { continue }
+				switch payload := b[i+1].(type) {
+				case xml.CharData:
+					mechanisms = append(mechanisms, string(payload))
+				}
+			}
+		}
+	}
+
+	for _, v := range(mechanisms) {
+		if v == "PLAIN" {
+			return nil
+		}
+	}
+
+	return errors.New("No compatible SASL mechanism given")
+}
-- 
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