func handleChannel(s *Stream, ch ssh.Channel, reqs <-chan *ssh.Request, handle func(*Stream)) {
// handle requests receive for this Channel
go func(in <-chan *ssh.Request) {
for req := range in {
logrus.Debugln("AdminTool -> Request of type:", req.Type, "len:", len(req.Type))
logrus.Debugln("AdminTool -> Request payload:", string(req.Payload), "len:", len(req.Payload))
if req.WantReply {
req.Reply(false, nil)
}
}
logrus.Debugln("AdminTool -> End of request GO chan")
}(reqs)
// read data from channel
go func() {
for {
buffer := make([]byte, 64)
n, err := ch.Read(buffer)
if err != nil {
if err.Error() == "EOF" {
handleData(s, []byte{}, true)
// all data received: handle Stream message
handle(s)
break
} else {
logrus.Fatalln("failed to read channel : " + err.Error())
}
}
handleData(s, buffer[:n], false)
}
}()
}
func (s *scpRequest) ParseSCPRequest(channel ssh.Channel, req *ssh.Request) error {
var err error
// Parse the payload received from the scp client
if s.original, err = parsePayload(req.Payload); err != nil {
return err
}
log.Println("being sent file:", s.original)
// Acknowledge payload.
if _, err = channel.Write(zeroByte); err != nil {
return errors.Wrap(err, "failed to write")
}
// Receive SCP Header
scpHeader := make([]byte, 2048) // size of buf in openssh
if _, err = channel.Read(scpHeader); err != nil {
return errors.Wrap(err, "failed to retrieve header")
}
if _, s.size, _, err = parseHeader(scpHeader); err != nil {
return errors.Wrap(err, "failed to parse scp header")
}
// Acknowledge We have received the SCP Header
if _, err = channel.Write(zeroByte); err != nil {
return errors.Wrap(err, "failed to reply to scp header")
}
return nil
}
func HandleTcpReading(channel ssh.Channel, term *terminal.Terminal, perms *ssh.Permissions) {
defer channel.Close()
//http := map[string]string{}
for {
// read up to 1MB of data
b := make([]byte, 1024*1024)
_, err := channel.Read(b)
if err != nil {
if err.Error() == "EOF" {
return
}
}
read := bufio.NewReader(strings.NewReader(string(b)))
toReq, err := http.ReadRequest(read)
// TODO: https will panic atm - need to figure this out
if err != nil {
log.Println("Error parsing request: ", err)
return
}
err = toReq.ParseForm()
if err != nil {
log.Println("Error parsing form: ", err)
return
}
url := fmt.Sprintf("%s%s", toReq.Host, toReq.URL)
httpReq := &HttpRequest{
Headers: toReq.Header,
URL: url,
FormData: toReq.Form,
Method: toReq.Method,
Guid: perms.Extensions["guid"],
Hostname: toReq.Host,
}
client := &http.Client{}
resp, err := client.Get(fmt.Sprintf("http://%s", url))
if err != nil {
log.Fatalf("Body read error: %s", err)
}
defer resp.Body.Close()
body, err2 := ioutil.ReadAll(resp.Body)
if err2 != nil {
log.Fatalf("Body read error: %s", err2)
}
httpReq.Response = string(body)
httpReq.Save()
log.Printf("[ http://%s ] %s", url, body)
channel.Write(body)
// make the http request
//if resp, ok := httpHandler[url]; ok {
// channel.Write(resp)
//} else {
// channel.Write([]byte("45.4.5.6"))
//}
channel.Close()
}
}
func (e *EchoHandler) Handle(parentTomb tomb.Tomb, sshConn *ssh.ServerConn, channel ssh.Channel, requests <-chan *ssh.Request) error {
defer channel.Close()
// Create tomb for terminal goroutines
var t tomb.Tomb
type msg struct {
length uint32
data []byte
}
in := make(chan msg)
defer close(in)
// Sessions have out-of-band requests such as "shell",
// "pty-req" and "env". Here we handle only the
// "shell" request.
t.Go(func() error {
var buffer bytes.Buffer
// Read channel
t.Go(func() error {
length := make([]byte, 4)
for {
n, err := channel.Read(length)
if err != nil {
return err
} else if n != 4 {
return errors.New("Invalid message length")
}
// Decode length
l, err := xbinary.LittleEndian.Uint32(length, 0)
if err != nil {
return err
}
// Read data
n64, err := buffer.ReadFrom(io.LimitReader(channel, int64(l)))
if err != nil {
return err
} else if n64 != int64(l) {
return errors.New("error: reading message")
}
select {
case <-parentTomb.Dying():
return nil
case <-t.Dying():
return nil
case in <- msg{l, buffer.Bytes()}:
}
}
})
length := make([]byte, 4)
OUTER:
for {
select {
case <-parentTomb.Dying():
t.Kill(nil)
break OUTER
case m := <-in:
if m.length == 0 {
return nil
}
// Encode length
_, err := xbinary.LittleEndian.PutUint32(length, 0, m.length)
if err != nil {
t.Kill(err)
return nil
}
// Write echo response
channel.Write(length)
channel.Write(m.data)
}
}
return nil
})
return t.Wait()
}
