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package xmpp
import (
"encoding/base64"
"encoding/xml"
"log"
)
type saslRequest struct {
Payload []byte `xml:",chardata"`
}
func (s *session) sasl() {
start := xml.StartElement{
xml.Name{"urn:ietf:params:xml:ns:xmpp-sasl", "auth"},
[]xml.Attr{
xml.Attr{xml.Name{"", "mechanism"}, "PLAIN"},
},
}
data := []byte("\x00" + username(s.jid) + "\x00" + s.pwd)
inner := saslRequest{}
inner.Payload = make([]byte, base64.StdEncoding.EncodedLen(len(data)))
base64.StdEncoding.Encode(inner.Payload, data)
err := s.tx.EncodeElement(inner, start)
if err != nil {
log.Println("Could not encode SASL PLAIN element!")
}
}
// hasSaslPlain scans the given stream features XML element for the SASL PLAIN
// mechanism which is supported by xengineering.eu/limox/xmpp. It returns true
// if the stream has support for this mechanism and false otherwise.
func hasSaslPlain(e []xml.Token) bool {
mechanism := xml.Name{`urn:ietf:params:xml:ns:xmpp-sasl`, `mechanism`}
for i, t := range e {
switch s := t.(type) {
case xml.StartElement:
if s.Name == mechanism {
if i+1 < len(e) {
subtype := func() string {
switch c := e[i+1].(type) {
case xml.CharData:
return string(c)
default:
return ""
}
}()
if subtype == `PLAIN` {
return true
}
}
}
}
}
return false
}
func saslSuccessHandler(s *session, e []xml.Token) {
}
func saslFailureHandler(s *session, e []xml.Token) {
log.Println("SASL autentication failed!")
}
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