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http.go
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http.go
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package services
import (
"crypto/tls"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"regexp"
"strings"
"time"
gtypes "github.com/cyops-se/safe-import/si-gatekeeper/types"
"github.com/cyops-se/safe-import/si-inner/common"
"github.com/cyops-se/safe-import/si-inner/types"
"github.com/cyops-se/safe-import/usvc"
"github.com/gorilla/mux"
)
var proxySvc *usvc.UsvcStub
type InnerHttpService struct {
usvc.Usvc
}
func (svc *InnerHttpService) Initialize(broker *usvc.UsvcBroker) {
svc.InitializeService(broker, 1, "si-inner", "http", "An inner part handling HTTP(S) requests for the safe-import solution")
svc.RegisterMethod("allitems", svc.allItems)
svc.RegisterMethod("byfieldname", svc.byFieldName)
svc.RegisterMethod("update", svc.update)
svc.RegisterMethod("prune", svc.prune)
svc.RegisterMethod("delete", svc.delete)
proxySvc = usvc.CreateStub(broker, "proxy", "si-gatekeeper", 1)
// We don't use settings right now
if err := svc.LoadSettings(); err != nil {
svc.SaveSettings() // Save default settings. Though we don't actually use the settings right now...
}
svc.Executor = svc.execute
svc.SetTaskIdleTime(60 * 1) // every minute
svc.execute()
go svc.startHTTPSServer(443)
go svc.startHTTPServer(80)
go svc.startHTTPServer(8530)
}
// Starts the HTTPS server
func (svc *InnerHttpService) startHTTPSServer(port int) {
// Create a router for HTTPS
r2 := mux.NewRouter()
r2.PathPrefix("/").HandlerFunc(svc.handleHTTPSrequest)
// Create HTTPS server with custom config
s := &http.Server{
Addr: fmt.Sprintf(":%d", port),
Handler: r2,
TLSConfig: new(tls.Config),
}
s.TLSConfig.GetCertificate = common.GetCertificateFunc
s.TLSConfig.MaxVersion = tls.VersionTLS12
svc.LogGeneric("info", "Starting HTTPS server at port :%d", port)
err := s.ListenAndServeTLS("", "")
if err != nil {
svc.LogGeneric("error", "Failed to start HTTPS server: %s", err.Error())
}
}
// Starts the HTTP server
func (svc *InnerHttpService) startHTTPServer(port int) {
// Create a router for HTTP
r := mux.NewRouter()
r.PathPrefix("/").HandlerFunc(svc.handleHTTPrequest)
svc.LogGeneric("info", "Starting HTTP server at port :%d", port)
err := http.ListenAndServe(fmt.Sprintf(":%d", port), r)
if err != nil {
svc.LogGeneric("error", "Failed to start HTTP server: %s", err.Error())
}
}
// Handles HTTPS requests pretty much identical to the one for HTTP
func (svc *InnerHttpService) handleHTTPSrequest(w http.ResponseWriter, r *http.Request) {
svc.processHttp(w, r, "HTTPS")
}
// Handles HTTP requests
func (svc *InnerHttpService) handleHTTPrequest(w http.ResponseWriter, r *http.Request) {
svc.processHttp(w, r, "HTTP")
}
func (svc *InnerHttpService) processHttp(w http.ResponseWriter, r *http.Request, scheme string) {
// Pack the request in a custom structure for JSOn marshalling
urlstring := fmt.Sprintf("%s://%s%s", strings.ToLower(scheme), r.Host, r.URL.RequestURI())
msg := &types.HttpRequest{Time: time.Now().UTC(), Type: scheme, FromIP: strings.Split(r.RemoteAddr, ":")[0], ToHost: r.Host,
Method: r.Method, URL: urlstring, MatchURL: regexp.QuoteMeta(urlstring), LastSeen: time.Now().UTC()}
u, _ := url.Parse(msg.URL)
svc.LogGeneric("info", "inner: Processing URL: %s", msg.URL)
// See if the URL matches one in the lists (white, black, grey)
if match := svc.matchURL(u, "white"); match != nil {
if match.Allowed {
svc.LogGeneric("info", "inner: WHITE URL ALLOWED: %s, from %s (ignore scan: %v)", msg.URL, msg.FromIP, match.NoScan)
request := >ypes.HttpDownloadRequest{URL: msg.URL, Method: r.Method, Headers: nil, Body: "", NoScan: match.NoScan}
// Add headers
for n, v := range r.Header {
request.Headers = append(request.Headers, gtypes.NameValue{Name: n, Value: v[0]})
}
// Add body
body, _ := ioutil.ReadAll(r.Body)
request.Body = base64.StdEncoding.EncodeToString(body)
if response, err := proxySvc.RequestMessage("httpget", request); err == nil {
if len(response.Payload) <= 0 {
svc.LogError("inner: Failed to download file via proxy", fmt.Errorf("Response payload from proxy download request is empty, response %#v", response))
}
var dr gtypes.HttpDownloadResponse
if err := json.Unmarshal([]byte(response.Payload), &dr); err != nil {
svc.LogError("inner: Marshalling proxy response to JSON failed: %#v", err)
}
for _, v := range dr.Headers {
if len(strings.TrimSpace(v.Name)) > 0 {
// fmt.Println("HEADER ", v.Name, v.Value)
w.Header().Set(v.Name, v.Value)
}
}
if file, err := os.Open(dr.Filename); err == nil {
defer file.Close()
io.Copy(w, file)
} else {
svc.LogError("inner: Failed to open file from si-outer", err)
}
} else {
svc.LogError(fmt.Sprintf("inner: Failed to request job from proxy, url %s, error", request.URL), err)
}
} else {
svc.LogGeneric("info", "inner: WHITE URL BLOCKED: %s, from %s", msg.URL, msg.FromIP)
}
} else if match := svc.matchURL(u, "black"); match != nil {
svc.LogGeneric("alert", "inner: BLACK URL ALERT: %s, from %s", msg.URL, msg.FromIP)
} else if match := svc.checkGrey(u); match == nil {
msg.Class = "grey"
msg.Count = 1
common.DB.Create(msg)
svc.LogGeneric("info", "inner: GREY URL ADDED: %s, from %s", msg.URL, msg.FromIP)
}
}
func (svc *InnerHttpService) matchURL(u *url.URL, class string) *types.HttpRequest {
var existing []types.HttpRequest
if result := common.DB.Find(&existing, "class LIKE ?", class); result.RowsAffected <= 0 {
return nil
}
// Now we iterate through the entries that matches scheme and fqdn
// and try to find a match using the entry MatchURL regexp
for _, v := range existing {
re, _ := regexp.Compile(v.MatchURL)
if re.MatchString(u.String()) {
v.Count++
v.LastSeen = time.Now().UTC()
common.DB.Save(v)
return &v
}
}
return nil
}
func (svc *InnerHttpService) checkGrey(u *url.URL) *types.HttpRequest {
var existing types.HttpRequest
if result := common.DB.First(&existing, "url = ? AND class = 'grey'", u.String()); result.RowsAffected <= 0 {
return nil
}
existing.Count++
existing.LastSeen = time.Now().UTC()
common.DB.Save(existing)
return &existing
}
func (svc *InnerHttpService) execute() {
}
func (svc *InnerHttpService) allItems(payload string) (interface{}, error) {
var items []types.HttpRequest
common.DB.Find(&items)
return items, nil
}
func (svc *InnerHttpService) byFieldName(payload string) (interface{}, error) {
var args types.ByNameRequest
if err := json.Unmarshal([]byte(payload), &args); err != nil {
svc.LogGeneric("error", "Marshalling request to JSON failed: %#v", err)
return nil, err
}
var items []types.HttpRequest
if result := common.DB.Where(map[string]interface{}{args.Name: args.Value}).Find(&items); result.Error != nil {
svc.LogGeneric("error", "Failed to query database, error: %#v", result.Error)
return nil, result.Error
} else {
// fmt.Println("byFieldName items count: ", result.RowsAffected, args.Name, args.Value)
}
return items, nil
}
func (svc *InnerHttpService) update(payload string) (interface{}, error) {
var item types.HttpRequest
if err := json.Unmarshal([]byte(payload), &item); err != nil {
svc.LogGeneric("error", "Marshalling request to JSON failed: %#v", err)
return nil, err
}
if result := common.DB.Save(&item); result.Error != nil {
svc.LogGeneric("error", "Failed to query database, error: %#v", result.Error)
return nil, result.Error
}
return item, nil
}
func (svc *InnerHttpService) prune(payload string) (interface{}, error) {
var allitems, whiteitems, blackitems []types.HttpRequest
// Get all lists
if result := common.DB.Find(&allitems); result.Error != nil {
svc.LogGeneric("error", "Failed to query database, error: %#v", result.Error)
return nil, result.Error
}
if result := common.DB.Find(&whiteitems, "class = 'white'"); result.Error != nil {
svc.LogGeneric("error", "Failed to query database, error: %#v", result.Error)
return nil, result.Error
}
if result := common.DB.Find(&blackitems, "class = 'black'"); result.Error != nil {
svc.LogGeneric("error", "Failed to query database, error: %#v", result.Error)
return nil, result.Error
}
// Pruning entries means removing all entries from the grey list that
// matches a MatchURL regexp field of a white or black entry.
for _, wv := range whiteitems {
for _, gv := range allitems {
if wv.ID != gv.ID {
re, _ := regexp.Compile(wv.MatchURL)
if re.MatchString(gv.URL) {
log.Printf("PRUNE: deleting %s from %s list", gv.URL, gv.Class)
if result := common.DB.Delete(&gv); result.Error != nil {
svc.LogGeneric("error", "Failed to delete item from database, error: %#v", result.Error)
return nil, result.Error
}
}
}
}
}
for _, bv := range blackitems {
for _, gv := range allitems {
if bv.ID != gv.ID {
re, _ := regexp.Compile(bv.MatchURL)
if re.MatchString(gv.URL) {
log.Printf("PRUNE: deleting %s from %s list", gv.URL, gv.Class)
if result := common.DB.Delete(&gv); result.Error != nil {
svc.LogGeneric("error", "Failed to delete item from database, error: %#v", result.Error)
return nil, result.Error
}
}
}
}
}
return nil, nil
}
func (svc *InnerHttpService) delete(payload string) (interface{}, error) {
var id string
if err := json.Unmarshal([]byte(payload), &id); err != nil {
svc.LogGeneric("error", "Marshalling request to JSON failed: %#v", err)
return nil, err
}
if result := common.DB.Delete(&types.HttpRequest{}, id); result.Error != nil {
svc.LogGeneric("error", "Failed to query database, error: %#v", result.Error)
return nil, result.Error
}
return nil, nil
}