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websocket.go
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websocket.go
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package tlsaudit
import (
"fmt"
"math/rand"
"net/http"
"sort"
"strings"
"time"
"github.com/adedayo/cidr"
tlsmodel "github.com/adedayo/tlsaudit/pkg/model"
"github.com/gorilla/websocket"
)
var (
allowedOrigins = []string{
"localhost:12345",
}
upgrader = websocket.Upgrader{
ReadBufferSize: 1024,
WriteBufferSize: 1024,
CheckOrigin: func(r *http.Request) bool {
for _, origin := range allowedOrigins {
if origin == r.Host {
return true
}
}
return false
},
}
)
type mydata struct {
Name string
Data []byte
}
//RealtimeAdvancedScan runs a scan asynchronously and streams result over a websocket
func RealtimeAdvancedScan(w http.ResponseWriter, req *http.Request) {
if conn, err := upgrader.Upgrade(w, req, nil); err == nil {
go func() {
defer conn.Close()
var request tlsmodel.AdvancedScanRequest
if err := conn.ReadJSON(&request); err == nil {
hostCount := 0
psr := tlsmodel.PersistedScanRequest{}
if request.ScanID == "" { //start a fresh scan
request.ScanID = getNextScanID()
for _, sg := range request.ScanGroups {
hosts := []string{}
ipAndDomain := []tlsmodel.IPAndDomain{}
for _, x := range sg.CIDRRanges {
//Normalise the domain into a CIDR format
x = strings.ReplaceAll(x, ",", "") //trim off any remaining commas
rng := "/32"
ports := ""
if strings.Contains(x, "/") {
rng = "/" + strings.Split(x, "/")[1]
}
if strings.Contains(x, ":") {
ports = strings.Split(strings.Split(x, "/")[0], ":")[1]
x = strings.Split(x, ":")[0] + rng
} else {
x = strings.Split(x, "/")[0] + rng
}
//-CIDR Normalisation complete
domain := x
hs := cidr.Expand(x)
ipDomain := []tlsmodel.IPAndDomain{}
if ports != "" {
for i, h := range hs {
hostCIDR := fmt.Sprintf("%s:%s/32", h, ports)
hs[i] = hostCIDR
ipDomain = append(ipDomain, tlsmodel.IPAndDomain{
IP: hostCIDR,
Domain: domain,
})
}
}
for _, h := range hs {
hosts = append(hosts, h)
ipAndDomain = append(ipAndDomain, tlsmodel.IPAndDomain{
IP: h,
Domain: domain,
})
}
}
//shuffle hosts randomly
rand.Shuffle(len(hosts), func(i, j int) {
hosts[i], hosts[j] = hosts[j], hosts[i]
})
rand.Shuffle(len(ipAndDomain), func(i, j int) {
ipAndDomain[i], ipAndDomain[j] = ipAndDomain[j], ipAndDomain[i]
})
psr.GroupedHosts = append(psr.GroupedHosts, tlsmodel.GroupedHost{
ScanGroup: sg,
Hosts: hosts,
IPAndDomains: ipAndDomain,
})
hostCount += len(hosts)
}
psr.HostCount = hostCount
psr.ScanStart = time.Now()
request.Day = psr.ScanStart.Format(dayFormat)
psr.Request = request
PersistScanRequest(psr)
} else {
//resume an existing scan
psr, err = LoadScanRequest(request.Day, request.ScanID)
if err != nil {
return
}
}
if psr.Request.Config.PacketsPerSecond <= 0 {
return
}
scanID := psr.Request.ScanID
//callback function to stream results over a websocket
callback := func(position int, results []tlsmodel.HumanScanResult, narrative string) {
res := []tlsmodel.HumanScanResult{}
for _, r := range results {
res = append(res, r)
}
out := tlsmodel.ScanProgress{
ScanID: scanID,
Progress: 100 * float32(position) / float32(psr.HostCount),
ScanResults: res,
Narrative: narrative,
}
conn.WriteJSON(out)
}
streamExistingResult(psr, callback)
counter := 0
for ghi, ghs := range psr.GroupedHosts {
for _, host := range ghs.IPAndDomains {
counter++
if counter < psr.Progress {
continue
}
position := counter
scan := make(map[string]tlsmodel.ScanResult)
results := []<-chan tlsmodel.ScanResult{}
results = append(results, ScanCIDRTLS(host.Domain, request.Config))
for result := range MergeResultChannels(results...) {
key := result.Server + result.Port
result.GroupID = ghi
if _, present := scan[key]; !present {
scan[key] = result
narrative := fmt.Sprintf("Partial scan of %s. Progress %f%% %d hosts of a total of %d in %f seconds\n",
result.Server, 100*float32(position)/float32(psr.HostCount), position, psr.HostCount, time.Since(psr.ScanStart).Seconds())
callback(position, Humanise([]tlsmodel.ScanResult{result}), narrative)
}
}
psr.Progress = position
psr.ScanEnd = time.Now()
PersistScanRequest(psr)
var scanResults []tlsmodel.ScanResult
for k := range scan {
scanResults = append(scanResults, scan[k])
}
sort.Sort(tlsmodel.ScanResultSorter(scanResults))
PersistScans(psr, host.IP, Humanise(scanResults))
narrative := fmt.Sprintf("Finished scan of %s. Progress %f%% %d hosts of a total of %d in %f seconds\n",
host, 100*float32(position)/float32(psr.HostCount), position, psr.HostCount, psr.ScanEnd.Sub(psr.ScanStart).Seconds())
callback(position, Humanise(scanResults), narrative)
}
}
} else {
println(err.Error())
return
}
}()
} else {
println(err.Error())
return
}
}