func (t *BindFeature) Negotate(strm *stream.Stream) error {
if strm.Jid.Resource != "" {
t.Resource = &strm.Jid.Resource
}
id := strconv.Itoa(rand.Intn(1000))
iq := Iq{To: strm.Jid.Server(), Id: &id, Payload: t}
typ := IqTypeSet
iq.Type = &typ
if err := strm.Send(&iq); err != nil {
return err
}
resp, err := strm.Read()
if err != nil {
return err
}
if resp == nil {
return stream.ErrUnexpectedEOF
}
switch rsp := resp.(type) {
case *Iq:
if rsp.Type != nil && *rsp.Type == IqTypeResult && rsp.Payload != nil {
if newt, ok := rsp.Payload.(*BindFeature); ok {
if newt.Jid != nil {
strm.Jid = newt.Jid
return nil
}
} else {
return stream.ErrMalformedProtocol
}
}
case *stream.Error:
return rsp
}
return stream.ErrMalformedProtocol
}
func (t *TLSFeature) Negotate(strm *stream.Stream) error {
if err := strm.Send(t); err != nil {
return err
}
data, err := strm.Read()
if err != nil {
return err
}
if data == nil {
return stream.ErrUnexpectedEOF
}
switch resp := data.(type) {
case *starttls.Proceed:
return turnTLS(strm)
case *starttls.Failure:
return resp
}
return stream.ErrMalformedProtocol
}
func sasl_PLAIN(strm *stream.Stream, password string) error {
var err error
data := "\x00" + strm.Jid.Node + "\x00" + password
method := "PLAIN"
if err = strm.Send(&sasl.Auth{&method, base64_encode(data)}); err != nil {
return err
}
resp, err := strm.Read()
if err != nil {
return err
}
switch resp := resp.(type) {
case *sasl.Success:
return nil
case *sasl.Failure:
return resp
case *stream.Error:
return resp
}
return stream.ErrMalformedProtocol
}
func (t *SessionFeature) Negotate(strm *stream.Stream) error {
id := strconv.Itoa(rand.Intn(1000))
typ := IqTypeSet
iq := Iq{From: strm.Jid, Id: &id, Payload: t, Type: &typ}
if err := strm.Send(&iq); err != nil {
return err
}
resp, err := strm.Read()
if err != nil {
return err
}
if resp == nil {
return stream.ErrUnexpectedEOF
}
switch resp := resp.(type) {
case *Iq:
if resp.Type != nil && *resp.Type == IqTypeResult {
return nil
}
case *stream.Error:
return resp
}
return stream.ErrMalformedProtocol
}
func sasl_DIGEST_MD5(strm *stream.Stream, password string) error {
var err error
var resp interface{}
method := "DIGEST-MD5"
if err = strm.Send(&sasl.Auth{&method, []byte{}}); err != nil {
return err
}
resp, err = strm.Read()
if err != nil {
return err
}
if resp == nil {
return stream.ErrUnexpectedEOF
}
switch rsp := resp.(type) {
case *sasl.Challenge:
var t []byte
if t, err = base64.StdEncoding.DecodeString(string(rsp.Data)); err != nil {
return err
}
var tokens map[string]string
if tokens, err = get_map(t); err != nil {
return err
}
nonce := tokens["nonce"]
cnonce := make_cnonce()
nc := "00000001"
digest_uri := "xmpp/" + strm.Jid.Domain
realm := strm.Jid.Domain
qop_list := strings.Split(tokens["qop"], ",")
exists := false
for _, x := range qop_list {
if x == "auth" {
exists = true
break
}
}
if !exists {
return errors.New("No known qop method")
}
qop := "auth"
a0 := md5_sum([]byte(strm.Jid.Node + ":" + realm + ":" + password))
a1 := string(a0) + ":" + nonce + ":" + cnonce
a2 := "AUTHENTICATE:" + digest_uri
t = []byte(hex(md5_sum([]byte(a1))) + ":" + nonce + ":" + nc + ":" + cnonce +
":" + qop + ":" + hex(md5_sum([]byte(a2))))
response := hex(md5_sum(t))
response = `charset=utf-8,username="******",realm="` + realm +
`",nonce=` + nonce + ",cnonce=" + cnonce + ",nc=" + nc +
`,qop="` + qop + `",digest-uri="` + digest_uri + `",response=` + response
if err = strm.Send(&sasl.Response{base64_encode(response)}); err != nil {
return err
}
resp, err = strm.Read()
if err != nil {
return err
}
if resp == nil {
return stream.ErrUnexpectedEOF
}
switch rsp := resp.(type) {
case *sasl.Challenge:
if err = strm.Send(&sasl.Response{}); err != nil {
return err
}
if resp, err = strm.Read(); err != nil {
return err
}
if resp == nil {
return stream.ErrUnexpectedEOF
}
switch rsp := resp.(type) {
case *sasl.Success:
return nil
case *sasl.Failure:
return rsp
case *stream.Error:
return rsp
}
case *sasl.Failure:
return rsp
case *stream.Error:
return rsp
}
}
return stream.ErrMalformedProtocol
}
func sasl_SCRAM_SHA_1(strm *stream.Stream, password string) error {
var err error
var resp interface{}
cnonce := make_cnonce()
clientFirstMessageBare := "n=" + strm.Jid.Node + ",r=" + cnonce
data := "n,," + clientFirstMessageBare
method := "SCRAM-SHA-1"
if err = strm.Send(&sasl.Auth{&method, base64_encode(data)}); err != nil {
return err
}
if resp, err = strm.Read(); err != nil {
return err
}
if resp == nil {
return stream.ErrUnexpectedEOF
}
switch rsp := resp.(type) {
case *sasl.Challenge:
var t []byte
if t, err = base64.StdEncoding.DecodeString(string(rsp.Data)); err != nil {
return err
}
ch := string(t)
serverFirstMessage := ch
tokens := scram_attributes(ch)
var salt []byte
if salt, err = base64.StdEncoding.DecodeString(tokens["s"]); err != nil {
return err
}
i, _ := strconv.Atoi(tokens["i"])
r := tokens["r"]
saltedpassword := scram_Hi([]byte(jid.Resourceprep(password)), salt, i)
clientKey := scram_HMAC(saltedpassword, []byte("Client Key"))
storedKey := scram_H(clientKey)
clientFinalMessageWithoutProof := "c=biws,r=" + r
authMessage := []byte(clientFirstMessageBare + "," + serverFirstMessage + "," +
clientFinalMessageWithoutProof)
clientSignature := scram_HMAC(storedKey, []byte(authMessage))
clientProof := scram_XOR(clientKey, clientSignature)
serverKey := scram_HMAC(saltedpassword, []byte("Server Key"))
serverSignature := scram_HMAC(serverKey, authMessage)
response := clientFinalMessageWithoutProof + ",p=" + string(base64_encode(string(clientProof)))
if err = strm.Send(&sasl.Response{base64_encode(response)}); err != nil {
return err
}
if resp, err = strm.Read(); err != nil {
return err
}
if resp == nil {
return stream.ErrUnexpectedEOF
}
switch rsp := resp.(type) {
case *sasl.Success:
var t []byte
if t, err = base64.StdEncoding.DecodeString(string(rsp.Data)); err != nil {
return err
}
tokens = scram_attributes(string(t))
v := tokens["v"]
if t, err = base64.StdEncoding.DecodeString(v); err != nil {
return err
}
if string(t) != string(serverSignature) {
return errors.New("Server Signature mismatch")
}
return nil
case *sasl.Failure:
return rsp
case *stream.Error:
return rsp
}
case *sasl.Failure:
return rsp
case *stream.Error:
return rsp
}
return stream.ErrMalformedProtocol
}