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secureServer.go
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secureServer.go
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package main
import (
"crypto/rand"
"crypto/tls"
"crypto/x509"
b64 "encoding/base64"
"fmt"
"io"
"io/ioutil"
"net/http"
"strings"
"sync"
"time"
"github.com/gorilla/websocket"
"github.com/me-box/lib-go-databox"
)
func ServeSecure(cm *ContainerManager, password string) {
databoxHttpsClient := libDatabox.NewDataboxHTTPsAPIWithPaths("/certs/containerManager.crt")
CM_HTTPS_CA_ROOT_CERT, _ := ioutil.ReadFile("/certs/containerManager.crt")
roots := x509.NewCertPool()
roots.AppendCertsFromPEM([]byte(CM_HTTPS_CA_ROOT_CERT))
//Proxy
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
//Auth
if auth(w, r, password) {
if websocket.IsWebSocketUpgrade(r) {
webSocketProxy(w, r, roots, cm)
} else {
proxy(w, r, databoxHttpsClient, cm)
}
}
})
libDatabox.ChkErrFatal(http.ListenAndServeTLS(":443", "./certs/container-manager.pem", "./certs/container-manager.pem", nil))
}
// Allows access to all /core-ui/ui/ paths except /core-ui/ui/api paths
var allowedStaticPath = "/core-ui/ui/"
var exceptPath = "/core-ui/ui/api/"
//A map to hold session tokens
var sessionTokens sync.Map
func auth(w http.ResponseWriter, r *http.Request, password string) bool {
if strings.HasPrefix(r.URL.Path, allowedStaticPath) && !strings.HasPrefix(r.URL.Path, exceptPath) {
//its allowed no auth needed
return true
}
if ("Token " + password) == r.Header.Get("Authorization") {
libDatabox.Debug("Password OK!")
//make a new session token
b := make([]byte, 24)
rand.Read(b) //TODO This could error should check
token := b64.StdEncoding.EncodeToString(b)
sessionTokens.Store(token, 1)
cookie := http.Cookie{
Name: "session",
Value: token,
Domain: r.URL.Hostname(),
Path: "/",
}
http.SetCookie(w, &cookie)
fmt.Fprintf(w, "connected")
return false
}
sessionCookie, _ := r.Cookie("session")
if sessionCookie != nil {
_, ok := sessionTokens.Load(sessionCookie.Value)
if ok {
return true
}
}
libDatabox.Err("Password validation error!" + r.Header.Get("Authorization"))
w.WriteHeader(http.StatusUnauthorized)
fmt.Fprintf(w, "Authorization Required")
return false
}
func webSocketProxy(w http.ResponseWriter, r *http.Request, roots *x509.CertPool, cm *ContainerManager) {
libDatabox.Debug("[proxyWebSocket] started")
parts := strings.Split(r.URL.Path, "/")
backendURL := "wss://" + parts[1] + ":8080/" + strings.Join(parts[2:], "/")
//libDatabox.Debug("[proxyWebSocket] proxing to " + backendURL)
if !cm.IsInstalled(parts[1]) {
//we have no host this is probably a malformed path (error in app or driver html)
libDatabox.Debug("[HTTP proxy] return 404 for websocket")
http.Error(w, "Page not found", http.StatusNotFound)
return
}
dialer := &websocket.Dialer{
TLSClientConfig: &tls.Config{
RootCAs: roots,
},
HandshakeTimeout: 5 * time.Second,
EnableCompression: false,
}
// Pass headers from the incoming request to the dialer to forward them to
// the final destinations.
requestHeader := http.Header{}
if origin := r.Header.Get("Origin"); origin != "" {
requestHeader.Add("Origin", origin)
}
for _, prot := range r.Header[http.CanonicalHeaderKey("Sec-WebSocket-Protocol")] {
requestHeader.Add("Sec-WebSocket-Protocol", prot)
}
for _, cookie := range r.Header[http.CanonicalHeaderKey("Cookie")] {
requestHeader.Add("Cookie", cookie)
}
connBackend, resp, err := dialer.Dial(backendURL, requestHeader)
if err != nil {
libDatabox.Debug("[ERROR proxyWebSocket] Could not open websocket connection to backend " + err.Error())
http.Error(w, "Could not open websocket connection to backend", http.StatusBadRequest)
return
}
defer connBackend.Close()
upgradeHeader := http.Header{}
if hdr := resp.Header.Get("Sec-Websocket-Protocol"); hdr != "" {
upgradeHeader.Set("Sec-Websocket-Protocol", hdr)
}
if hdr := resp.Header.Get("Set-Cookie"); hdr != "" {
upgradeHeader.Set("Set-Cookie", hdr)
}
conn, err := websocket.Upgrade(w, r, upgradeHeader, 1024, 1024)
if err != nil {
libDatabox.Debug("[ERROR proxyWebSocket] Could not open websocket connection " + err.Error())
http.Error(w, "Could not open websocket connection", http.StatusBadRequest)
}
defer connBackend.Close()
errClient := make(chan error, 1)
errBackend := make(chan error, 1)
copy := func(from *websocket.Conn, to *websocket.Conn, errorChan chan error) {
for {
msgType, msg, err := from.ReadMessage()
if err != nil {
m := websocket.FormatCloseMessage(websocket.CloseNormalClosure, fmt.Sprintf("%v", err))
if e, ok := err.(*websocket.CloseError); ok {
if e.Code != websocket.CloseNoStatusReceived {
m = websocket.FormatCloseMessage(e.Code, e.Text)
}
}
errorChan <- err
to.WriteMessage(websocket.CloseMessage, m)
break
}
err = to.WriteMessage(msgType, msg)
if err != nil {
errorChan <- err
break
}
}
}
libDatabox.Debug("[proxyWebSocket] copying data")
go copy(conn, connBackend, errClient)
go copy(connBackend, conn, errBackend)
var message string
select {
case err = <-errClient:
message = "Error when copying from backend to client: %v"
case err = <-errBackend:
message = "Error when copying from client to backend: %v"
}
if e, ok := err.(*websocket.CloseError); !ok || e.Code == websocket.CloseAbnormalClosure {
libDatabox.Err("[ERROR proxyWebSocket]" + message + " " + err.Error())
}
return
}
func proxy(w http.ResponseWriter, r *http.Request, databoxHttpsClient *http.Client, cm *ContainerManager) {
parts := strings.Split(r.URL.Path, "/")
var RequestURI string
if len(parts) < 3 {
RequestURI = "https://core-ui:8080/ui/"
} else {
RequestURI = "https://" + parts[1] + ":8080/" + strings.Join(parts[2:], "/")
if !cm.IsInstalled(parts[1]) {
//we have no host this is probably a malformed path (error in app or driver html)
libDatabox.Debug("[HTTP proxy] return 404 for " + RequestURI)
http.Error(w, "Page not found", http.StatusNotFound)
return
}
if r.URL.RawQuery != "" {
RequestURI += "?" + r.URL.RawQuery
}
}
var wg sync.WaitGroup
copy := func() {
defer wg.Done()
req, err := http.NewRequest(r.Method, RequestURI, r.Body)
for name, value := range r.Header {
req.Header.Set(name, value[0])
}
resp, err := databoxHttpsClient.Do(req)
if resp != nil {
defer resp.Body.Close()
}
if err != nil {
libDatabox.Err("[HTTP proxy] got error " + err.Error())
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
for k, v := range resp.Header {
w.Header().Set(k, v[0])
}
w.WriteHeader(resp.StatusCode)
io.Copy(w, resp.Body)
}
wg.Add(1)
go copy()
wg.Wait()
}