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package xmpp
import (
"encoding/xml"
"encoding/base64"
"errors"
)
func sendSaslAuth(b []xml.Token, c *Conn) 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" {
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(c.jid) + "\x00" + c.pwd)
dst := make([]byte, base64.StdEncoding.EncodedLen(len(data)))
base64.StdEncoding.Encode(dst, data)
payload := xml.CharData(dst)
end := start.End()
c.enc.encodeNow(start)
c.enc.encode(payload)
c.enc.encodeNow(end)
return nil
}
}
return errors.New("No compatible SASL mechanism given")
}
func onSaslSuccess(b []xml.Token, c *Conn) error {
sendStreamStart(&c.enc, c.jid)
return nil
}
func onSaslFailure(b []xml.Token, c *Conn) error {
return errors.New("Authentication failed")
}
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