// Authenticate implements the Mechanism interface for PlainMech
func (pm plainMech) Authenticate(data string, props stream.Properties) ([]element.Element, stream.Properties, bool) {
decoded, err := base64.StdEncoding.DecodeString(data)
if err != nil {
return []element.Element{element.SASLFailure.MalformedRequest}, props, false
}
res := strings.Split(string(decoded), "\000")
if len(res) != 3 {
return []element.Element{element.SASLFailure.MalformedRequest}, props, false
}
identity, user, password := res[0], res[1], res[2]
err = pm.auth.Authenticate(identity, user, password)
// TODO: Handle different types of errors
if err != nil {
return []element.Element{element.SASLFailure.NotAuthorized}, props, false
}
if identity != "" {
user = identity
} else {
// TODO: Add a way to determine the address of the server for the domain
// part of the jid (do it better than this.)
user += "@" + props.Domain
}
j := jid.New(user)
props.Header.To = j.String()
props.Status = props.Status | stream.Restart | stream.Auth
return []element.Element{element.SASLSuccess}, props, false
}
func (h Handler) GenerateFeature(props stream.Properties) stream.Properties {
if props.Status&stream.Bind != 0 || props.Status&stream.Auth == 0 {
return props
}
props.Features = append(props.Features, element.Bind)
return props
}
func (sh SessionHandler) HandleFeature(props stream.Properties) stream.Properties {
if props.Status&stream.Bind != 0 || props.Status&stream.Auth == 0 {
return props
}
props.Features = append(props.Features, element.Session)
return props
}
func (h *Handler) GenerateFeature(props stream.Properties) stream.Properties {
if props.Status&stream.Auth != 0 {
return props
}
mechs := element.SASLMechanisms
for name := range h.mechs {
mechs = mechs.AddChild(element.New("mechanism").SetText(name))
}
props.Features = append(props.Features, mechs)
return props
}
func TestStartInitiating(t *testing.T) {
t.Parallel()
var want, got []byte
var props stream.Properties
var err error
pipe1, pipe2 := net.Pipe()
tcpTsp := NewTCP(pipe1, stream.Initiating, nil, false)
props.Header = stream.Header{}
// Should get error when starting stream with empty header
_, err = tcpTsp.Start(props)
if err != stream.ErrHeaderNotSet {
t.Error("Should get error when starting stream with empty header.")
t.Errorf("\nWant:%s\nGot :%s", stream.ErrHeaderNotSet, err)
}
// Should write header to underlying connection
hdr := stream.Header{To: "foo", From: "bar"}
want = hdr.WriteBytes()
props.Header = hdr
got = make([]byte, len(want))
go func() {
_, err := pipe2.Read(got)
if err != nil {
t.Errorf("Unexpected error while reading from pipe2: %s", err)
}
}()
_, err = tcpTsp.Start(props)
if err != nil {
t.Errorf("Unexpected error while starting stream: %s", err)
}
if !bytes.Equal(want, got) {
t.Error("Should write header to underlying connection")
t.Errorf("\nWant:%s\nGot :%s", want, got)
}
}
func (h Handler) HandleIQ(iq stanza.IQ, props stream.Properties) ([]stanza.Stanza, stream.Properties) {
var sts []stanza.Stanza
// ensure we have a bind request
req, err := stanza.TransformBindRequest(iq)
if err != nil {
// TODO: Should this return an error?
return sts, props
}
if req.Resource == "" {
// TODO: Create a random resource generator
req.Resource = genResourceID()
}
// Should do some resource validation here.
// TODO: Need to use proper jids here.
props.Header.To += "/" + req.Resource
j := jid.New(props.Header.To)
res := stanza.NewBindResult(iq, j)
sts = append(sts, res.TransformStanza())
props.Status = props.Status | stream.Bind
return sts, props
}
// Start starts or restarts the stream.
//
// In recieving mode, the transport will wait to recieve a stream header
// from the initiating entity, then sends its own header and the stream
// features. This transport will add the starttls feature under certain
// conditions.
func (t *TCP) Start(props stream.Properties) (stream.Properties, error) {
if t.mode == stream.Initiating {
if props.Header == (stream.Header{}) {
return props, stream.ErrHeaderNotSet
}
b := props.Header.WriteBytes()
_, err := t.Write(b)
return props, err
}
// We're in recieving mode
if props.Domain == "" {
return props, stream.ErrDomainNotSet
}
var el element.Element
var h stream.Header
var err error
el, err = t.Next()
if err != nil {
return props, err
}
h, err = stream.NewHeader(el)
if err != nil {
return props, err
}
h.ID = genStreamID()
if h.To != props.Domain {
h.To, h.From = h.From, props.Domain
b := h.WriteBytes()
t.Write(b)
err = t.WriteElement(element.StreamError.HostUnknown)
props.Status = stream.Closed
return props, err
}
h.From, h.To = props.Domain, h.From
if props.To != "" {
h.To = props.To
}
props.Header = h
b := props.Header.WriteBytes()
_, err = t.Write(b)
if err != nil {
return props, err
}
ftrs := element.StreamFeatures
for _, f := range props.Features {
ftrs = ftrs.AddChild(f)
}
// Stream features
if t.conf != nil && !t.secure {
tlsFeature := element.StartTLS
if t.tlsRequired {
tlsFeature = tlsFeature.AddChild(element.Required)
}
// Overwrite any other features
ftrs.Child = []element.Token{tlsFeature}
}
err = t.WriteElement(ftrs)
return props, err
}
func TestStartReceiving(t *testing.T) {
t.Parallel()
var want, got []byte
var props, gotProps stream.Properties
var err, wantErr error
pipe1, pipe2 := net.Pipe()
tcpTsp := NewTCP(pipe1, stream.Receiving, &tls.Config{}, true)
props.Header = stream.Header{}
// Should return Domain Not Set error if the domain isnot set on the
// stream properties.
_, err = tcpTsp.Start(props)
if err != stream.ErrDomainNotSet {
t.Error("Should return ErrDomainNotSet error if the domain is no set on the properties.")
t.Errorf("\nWant:%s\nGot :%s", stream.ErrDomainNotSet, err)
}
// Should return error from Next
props.Domain = "localhost"
err = pipe2.Close()
if err != nil {
t.Errorf("Unexpected error from pipe2.Close: %s", err)
}
_, err = tcpTsp.Start(props)
if err != io.EOF {
t.Error("Should return error from Next")
t.Errorf("\nWant:%s\nGot :%s", io.EOF, err)
}
// Should return error from NewHeader
pipe1, pipe2 = net.Pipe()
tcpTsp = NewTCP(pipe1, stream.Receiving, &tls.Config{}, true)
go func() {
_, err := pipe2.Write([]byte("<baz xmlns='foo:bar'/>"))
if err != nil {
t.Errorf("Unexpected error while writing to pipe2: %s", err)
}
}()
_, err = tcpTsp.Start(props)
wantErr = fmt.Errorf("Element is not <stream:stream> it is a <foo:bar:baz>")
if err.Error() != wantErr.Error() {
t.Error("Should return error from NewHeader")
t.Errorf("\nWant:%s\nGot :%s", wantErr, err)
}
// Should send HostUnknown if the to field of the header does not match the
// Domain field on properties
pipe1, pipe2 = net.Pipe()
tcpTsp = NewTCP(pipe1, stream.Receiving, &tls.Config{}, true)
go func() {
hdr := stream.Header{To: "not-localhost", From: "foo@bar"}
_, err := pipe2.Write(hdr.WriteBytes())
if err != nil {
t.Errorf("Unexpected error while writing to pipe2: %s", err)
}
hdr.To, hdr.From = hdr.From, "localhost"
want = hdr.WriteBytes()
// We need to add an extra 36 bytes for the id length
hdrLen := len(want) + 36
want = append(want, element.StreamError.HostUnknown.WriteBytes()...)
// We need to add an extra 36 bytes for the id length
got = make([]byte, len(want)+36)
_, err = pipe2.Read(got)
if err != nil {
t.Errorf("Unexpected error while reading from pipe2: %s", err)
}
_, err = pipe2.Read(got[hdrLen:])
if err != nil {
t.Errorf("Unexpected error while reading from pipe2: %s", err)
}
}()
gotProps, err = tcpTsp.Start(props)
if err != nil {
t.Errorf("Unexpected error from Start: %s", err)
}
if gotProps.Status != stream.Closed {
t.Error("Expected stream to be marked as closed after host unknown error")
}
// Need to remove stream ID before comparing
idx := bytes.Index(got, []byte("id='"))
if idx == -1 {
t.Error("Received stream is missing id attribute")
}
// We slice the id out of the received stream header.
got = append(got[:idx+4], got[idx+40:]...)
if !bytes.Equal(want, got) {
t.Error("Should send HostUnknown if the to field of the header does not match the domain field on properties.")
t.Errorf("\nWant:%s\nGot :%s", want, got)
}
// Should return error from writing header to the underlying connection
pipe1, pipe2 = net.Pipe()
tcpTsp = NewTCP(pipe1, stream.Receiving, &tls.Config{}, true)
go func() {
hdr := stream.Header{To: "localhost", From: "foo@bar"}
_, err := pipe2.Write(hdr.WriteBytes())
if err != nil {
t.Errorf("Unexpected error while writing to pipe2: %s", err)
}
err = pipe2.Close()
if err != nil {
t.Errorf("Unexpected error while closing pipe2: %s", err)
}
}()
gotProps, err = tcpTsp.Start(props)
if err != io.ErrClosedPipe {
t.Error("Should return error from writing header to the underlying connection.")
t.Errorf("\nWant:%s\nGot :%s", io.ErrClosedPipe, err)
}
// Should set the To field to the properties To field if it is set
props.To = "authenticatedFoo@bar"
// Should overwrite stream features if there is a tls config and the stream
// is not yet secure
pipe1, pipe2 = net.Pipe()
tcpTsp = NewTCP(pipe1, stream.Receiving, &tls.Config{}, true)
go func() {
hdr := stream.Header{To: "localhost", From: "foo@bar"}
_, err := pipe2.Write(hdr.WriteBytes())
if err != nil {
t.Errorf("Unexpected error while writing to pipe2: %s", err)
}
// Doing two tests at the same time, because they are orthogonal
hdr.To, hdr.From = "authenticatedFoo@bar", "localhost"
want = hdr.WriteBytes()
// We need to add an extra 36 bytes for the id length
hdrLen := len(want) + 36
ftrs := element.StreamFeatures.AddChild(
element.StartTLS.AddChild(
element.Required),
)
want = append(want, ftrs.WriteBytes()...)
// We need to add an extra 36 bytes for the id length
got = make([]byte, len(want)+36)
_, err = pipe2.Read(got)
if err != nil {
t.Errorf("Unexpected error while reading from pipe2: %s", err)
}
_, err = pipe2.Read(got[hdrLen:])
if err != nil {
t.Errorf("Unexpected error while reading from pipe2: %s", err)
}
}()
gotProps, err = tcpTsp.Start(props)
if err != nil {
t.Errorf("Unexpected error from Start: %s", err)
}
// Need to remove stream ID before comparing
idx = bytes.Index(got, []byte("id='"))
if idx == -1 {
t.Error("Received stream is missing id attribute")
}
// We slice the id out of the received stream header.
got = append(got[:idx+4], got[idx+40:]...)
if !bytes.Equal(want, got) {
t.Error("Should overwrite stream features if there is a tls config and the stream is not yet secure.")
t.Errorf("\nWant:%s\nGot :%s", want, got)
}
// Should be able to start stream
props.Features = append(props.Features, element.Bind)
pipe1, pipe2 = net.Pipe()
tcpTsp = NewTCP(pipe1, stream.Receiving, &tls.Config{}, true)
tcpTsp.(*TCP).secure = true
go func() {
hdr := stream.Header{To: "localhost", From: "foo@bar"}
_, err := pipe2.Write(hdr.WriteBytes())
if err != nil {
t.Errorf("Unexpected error while writing to pipe2: %s", err)
}
// Doing two tests at the same time, because they are orthogonal
hdr.To, hdr.From = "authenticatedFoo@bar", "localhost"
want = hdr.WriteBytes()
// We need to add an extra 36 bytes for the id length
hdrLen := len(want) + 36
ftrs := element.StreamFeatures.AddChild(element.Bind)
want = append(want, ftrs.WriteBytes()...)
// We need to add an extra 36 bytes for the id length
got = make([]byte, len(want)+36)
_, err = pipe2.Read(got)
if err != nil {
t.Errorf("Unexpected error while reading from pipe2: %s", err)
}
_, err = pipe2.Read(got[hdrLen:])
if err != nil {
t.Errorf("Unexpected error while reading from pipe2: %s", err)
}
}()
gotProps, err = tcpTsp.Start(props)
if err != nil {
t.Errorf("Unexpected error from Start: %s", err)
}
// Need to remove stream ID before comparing
idx = bytes.Index(got, []byte("id='"))
if idx == -1 {
t.Error("Received stream is missing id attribute")
}
// We slice the id out of the received stream header.
got = append(got[:idx+4], got[idx+40:]...)
if !bytes.Equal(want, got) {
t.Error("Should be able to start stream")
t.Errorf("\nWant:%s\nGot :%s", want, got)
}
}
