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https_worker.go
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https_worker.go
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package worker
import (
"fmt"
"log"
"sync"
"time"
"github.com/censoredplanet/CenFuzz/https_fuzzer"
"github.com/censoredplanet/CenFuzz/util"
"github.com/google/go-cmp/cmp"
)
func HTTPSFuzzerMapping(fuzzer int) string {
switch fuzzer {
case 1:
return "SNI Padding"
case 2:
return "Min Version Alternate"
case 3:
return "Max Version Alternate"
case 4:
return "CipherSuite Alternate"
case 5:
return "Client Certificate Alternate"
case 6:
return "SNI Alternate"
case 7:
return "SNI TLD Alternate"
case 8:
return "SNI Subdomain Alternate"
default:
return "NA"
}
}
type HTTPSWorker struct{}
func (f FuzzerSpec) HTTPSFuzzerInterface() https_fuzzer.Fuzzer {
switch f.Fuzzer() {
case 1:
return &https_fuzzer.ServernamePadding{}
case 2:
return &https_fuzzer.MinVersionAlternate{}
case 3:
return &https_fuzzer.MaxversionAlternate{}
case 4:
return &https_fuzzer.CipherSuiteAlternate{}
case 5:
return &https_fuzzer.ClientCertAlternate{}
case 6:
return &https_fuzzer.ServernameAlternate{}
case 7:
return &https_fuzzer.ServernameTLDAlternate{}
case 8:
return &https_fuzzer.ServernameSubdomainsAlternate{}
default:
panic("unknown fuzzer")
}
}
type HTTPSFuzzerObject struct {
TestName string
Spec FuzzerSpec
RequestWords []*https_fuzzer.RequestWord
}
type HTTPSWork struct {
IP string
Domain string
Fuzzers []*HTTPSFuzzerObject
}
func (h *HTTPSWorker) Work(ip string, domain string, fuzzers interface{}) interface{} {
return &HTTPSWork{
IP: ip,
Domain: domain,
Fuzzers: fuzzers.([]*HTTPSFuzzerObject),
}
}
func (h *HTTPSWorker) FuzzerObjects(fuzzerList []*util.FuzzerInput) interface{} {
var fuzzerObjects []*HTTPSFuzzerObject
for _, fuzzerStruct := range fuzzerList {
fuzzerspec := FuzzerSpec(fuzzerStruct.FuzzerNumber)
fuzzerName := HTTPSFuzzerMapping(fuzzerStruct.FuzzerNumber)
if fuzzerName == "NA" {
log.Println("[HTTPSWorker.FuzzerObjects] WARNING: Fuzzer not available: ", fuzzerStruct.FuzzerNumber)
continue
}
requestWords := fuzzerspec.HTTPSFuzzerInterface().Init(fuzzerStruct.All)
fuzzerObjects = append(fuzzerObjects, &HTTPSFuzzerObject{
TestName: fuzzerName,
Spec: fuzzerspec,
RequestWords: requestWords,
})
}
return fuzzerObjects
}
func (h *HTTPSWorker) GenerateTemplate(response interface{}, keyword string) interface{} {
if response == nil {
return nil
}
tlsResponse := response.(*util.TLSdata)
filterDomain := newDomainFilter(keyword)
filterBody := func(body string) string {
body = timestampRegex.ReplaceAllString(body, TimestampReplacmentMarker)
body = akamaiRegex.ReplaceAllString(body, AkamiIdReplacementMarker)
return filterDomain(body)
}
returnResponse := tlsResponse
returnResponse.HTTPResponse = filterBody(tlsResponse.HTTPResponse.(string))
return returnResponse
}
//TODO: there are more efficient ways of doing this than going through the list twice, but this will do for now
func (h *HTTPSWorker) MatchesControl(results []*util.Result) []*util.Result {
var normalResponse interface{}
var normalError interface{}
for _, result := range results {
if result.IsNormal == true {
normalResponse = h.GenerateTemplate(result.Response, result.Domain)
normalError = result.Error
}
}
for _, result := range results {
normalDifferences := ""
uncensoredDifferences := ""
resultResponseTemplate := h.GenerateTemplate(result.Response, result.Domain)
uncensoredResponseTemplate := h.GenerateTemplate(result.UncensoredResponse, result.Domain)
var normalResponseObject *util.TLSdata
var resultResponseTemplateObject *util.TLSdata
var uncensoredResponseTemplateObject *util.TLSdata
if normalResponse != nil {
normalResponseObject = normalResponse.(*util.TLSdata)
}
if resultResponseTemplate != nil {
resultResponseTemplateObject = resultResponseTemplate.(*util.TLSdata)
}
if uncensoredResponseTemplate != nil {
uncensoredResponseTemplateObject = uncensoredResponseTemplate.(*util.TLSdata)
}
if (resultResponseTemplateObject != nil && normalResponseObject != nil) && cmp.Equal(resultResponseTemplateObject, normalResponseObject) && result.Error == normalError {
result.MatchesNormal = true
} else {
if resultResponseTemplateObject == nil {
normalDifferences += "Empty censored response;"
}
if normalResponseObject == nil {
normalDifferences += "Empty normal response;" //Should never happen, since we error out earlier if we get a dial error in normal query. Keeping this here just for error handling in case of exception
}
if resultResponseTemplateObject != nil && normalResponseObject != nil {
//TODO: Will first if statement here ever happen?
if resultResponseTemplateObject.Version == 0 && normalResponseObject.Version != 0 {
normalDifferences += "No expected response;"
}
if result.Error == nil && normalError != nil {
normalDifferences += "No expected error;"
}
if normalResponseObject.Version != 0 && (resultResponseTemplateObject.Version != normalResponseObject.Version) {
normalDifferences += "Different version;"
}
if normalResponseObject.CipherSuite != 0 && (resultResponseTemplateObject.CipherSuite != normalResponseObject.CipherSuite) {
normalDifferences += "Different ciphersuite;"
}
if normalResponseObject.PeerCertificates != nil && (string(resultResponseTemplateObject.PeerCertificates) != string(normalResponseObject.PeerCertificates)) {
normalDifferences += "Different certificate;"
}
if normalError != nil && (result.Error != normalError) {
normalDifferences += "Different error;"
}
}
result.MatchesNormal = false
}
result.NormalDifferences = normalDifferences
if (resultResponseTemplate != nil && resultResponseTemplateObject != nil) && cmp.Equal(resultResponseTemplateObject, uncensoredResponseTemplateObject) && result.Error == result.UncensoredError {
result.MatchesUncensored = true
} else {
if resultResponseTemplateObject == nil {
uncensoredDifferences += "Empty censored response;"
result.MatchesUncensored = false
}
if uncensoredResponseTemplateObject == nil {
uncensoredDifferences += "Empty uncensored response;"
result.MatchesUncensored = false
}
if resultResponseTemplateObject != nil && uncensoredResponseTemplateObject != nil {
if resultResponseTemplateObject.Version == 0 && uncensoredResponseTemplateObject.Version != 0 {
uncensoredDifferences += "No expected response;"
}
if result.Error == nil && result.UncensoredError != nil {
uncensoredDifferences += "No expected error;"
}
if uncensoredResponseTemplateObject.Version != 0 && (resultResponseTemplateObject.Version != uncensoredResponseTemplateObject.Version) {
uncensoredDifferences += "Different version;"
}
if uncensoredResponseTemplateObject.CipherSuite != 0 && (resultResponseTemplateObject.CipherSuite != uncensoredResponseTemplateObject.CipherSuite) {
uncensoredDifferences += "Different ciphersuite;"
}
if uncensoredResponseTemplateObject.PeerCertificates != nil && (string(resultResponseTemplateObject.PeerCertificates) != string(uncensoredResponseTemplateObject.PeerCertificates)) {
uncensoredDifferences += "Different certificate;"
}
if result.UncensoredError != nil && (result.Error != result.UncensoredError) {
uncensoredDifferences += "Different error;"
}
}
//NOTE: Taking a call here to mark this as false even if censored and uncensored are both empty
result.MatchesUncensored = false
}
result.UncensoredDifferences = uncensoredDifferences
}
return results
}
func (h *HTTPSWorker) SendResults(results []*util.Result, ResultsQueue chan<- *util.Result) {
annotatedResults := h.MatchesControl(results)
for _, result := range annotatedResults {
ResultsQueue <- result
}
}
func (h *HTTPSWorker) Worker(workQueue <-chan interface{}, resultQueue chan<- *util.Result, uncensoredDomain string, wg *sync.WaitGroup, done chan<- bool) {
for w := range workQueue {
work := w.(*HTTPSWork)
var results []*util.Result
//Uncensored Normal
startTime := time.Now()
uncensoredRequest, uncensoredResponse, uncensoredError := https_fuzzer.MakeConnection(work.IP, uncensoredDomain, https_fuzzer.RequestWord{Servername: uncensoredDomain})
time.Sleep(util.Sleep(uncensoredError))
//Censored Normal
censoredRequest, censoredResponse, censoredError := https_fuzzer.MakeConnection(work.IP, work.Domain, https_fuzzer.RequestWord{Servername: work.Domain})
time.Sleep(util.Sleep(censoredError))
endTime := time.Now()
//Add normal results
results = append(results, &util.Result{
IP: work.IP,
Domain: work.Domain,
TestName: "Normal",
IsNormal: true,
Request: censoredRequest,
Response: censoredResponse,
Error: censoredError,
UncensoredRequest: uncensoredRequest,
UncensoredResponse: uncensoredResponse,
UncensoredError: uncensoredError,
StartTime: startTime,
EndTime: endTime,
})
if Break(censoredError) && Break(uncensoredError) {
h.SendResults(results, resultQueue)
wg.Done()
continue
}
var breakFlag bool
for _, fuzzerObject := range work.Fuzzers {
breakFlag = false
for _, requestWord := range fuzzerObject.RequestWords {
//Uncensored Test
//Create copy
uncensoredRequestWord := requestWord.Servername
censoredRequestWord := requestWord.Servername
formattedUncensoredDomain := fmt.Sprintf(uncensoredRequestWord, uncensoredDomain)
startTime = time.Now()
uncensoredRequest, uncensoredResponse, uncensoredErr := fuzzerObject.Spec.HTTPSFuzzerInterface().Fuzz(work.IP, work.Domain, https_fuzzer.RequestWord{
Servername: formattedUncensoredDomain,
MinVersion: requestWord.MinVersion,
MaxVersion: requestWord.MaxVersion,
CipherSuites: requestWord.CipherSuites,
Certificate: requestWord.Certificate,
})
time.Sleep(util.Sleep(uncensoredErr))
formattedCensoredDomain := fmt.Sprintf(censoredRequestWord, work.Domain)
censoredRequest, censoredResponse, censoredErr := fuzzerObject.Spec.HTTPSFuzzerInterface().Fuzz(work.IP, work.Domain, https_fuzzer.RequestWord{
Servername: formattedCensoredDomain,
MinVersion: requestWord.MinVersion,
MaxVersion: requestWord.MaxVersion,
CipherSuites: requestWord.CipherSuites,
Certificate: requestWord.Certificate,
})
time.Sleep(util.Sleep(censoredErr))
endTime = time.Now()
results = append(results, &util.Result{
IP: work.IP,
Domain: work.Domain,
TestName: fuzzerObject.TestName,
IsNormal: false,
Request: censoredRequest,
Response: censoredResponse,
Error: censoredErr,
UncensoredRequest: uncensoredRequest,
UncensoredResponse: uncensoredResponse,
UncensoredError: uncensoredErr,
StartTime: startTime,
EndTime: endTime,
})
if Break(censoredError) && Break(uncensoredError) {
breakFlag = true
break
}
}
if breakFlag {
break
}
}
h.SendResults(results, resultQueue)
wg.Done()
}
done <- true
}