/
simple.go
197 lines (164 loc) · 5.08 KB
/
simple.go
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package runner
import (
"bytes"
"crypto/tls"
"fmt"
"io/ioutil"
"net"
"net/http"
"net/http/httptrace"
"net/http/httputil"
"net/textproto"
"net/url"
"strconv"
"strings"
"time"
"github.com/Damian89/ffuf/pkg/ffuf"
)
//Download results < 5MB
const MAX_DOWNLOAD_SIZE = 5242880
type SimpleRunner struct {
config *ffuf.Config
client *http.Client
}
func NewSimpleRunner(conf *ffuf.Config, replay bool) ffuf.RunnerProvider {
var simplerunner SimpleRunner
proxyURL := http.ProxyFromEnvironment
customProxy := ""
if replay {
customProxy = conf.ReplayProxyURL
} else {
customProxy = conf.ProxyURL
}
if len(customProxy) > 0 {
pu, err := url.Parse(customProxy)
if err == nil {
proxyURL = http.ProxyURL(pu)
}
}
simplerunner.config = conf
simplerunner.client = &http.Client{
CheckRedirect: func(req *http.Request, via []*http.Request) error { return http.ErrUseLastResponse },
Timeout: time.Duration(time.Duration(conf.Timeout) * time.Second),
Transport: &http.Transport{
ForceAttemptHTTP2: conf.Http2,
Proxy: proxyURL,
MaxIdleConns: 1000,
MaxIdleConnsPerHost: 500,
MaxConnsPerHost: 500,
DialContext: (&net.Dialer{
Timeout: time.Duration(time.Duration(conf.Timeout) * time.Second),
}).DialContext,
TLSHandshakeTimeout: time.Duration(time.Duration(conf.Timeout) * time.Second),
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
Renegotiation: tls.RenegotiateOnceAsClient,
ServerName: conf.SNI,
},
}}
if conf.FollowRedirects {
simplerunner.client.CheckRedirect = nil
}
return &simplerunner
}
func (r *SimpleRunner) Prepare(input map[string][]byte, basereq *ffuf.Request) (ffuf.Request, error) {
req := ffuf.CopyRequest(basereq)
for keyword, inputitem := range input {
req.Method = strings.ReplaceAll(req.Method, keyword, string(inputitem))
headers := make(map[string]string, len(req.Headers))
for h, v := range req.Headers {
var CanonicalHeader string = textproto.CanonicalMIMEHeaderKey(strings.ReplaceAll(h, keyword, string(inputitem)))
headers[CanonicalHeader] = strings.ReplaceAll(v, keyword, string(inputitem))
}
req.Headers = headers
req.Url = strings.ReplaceAll(req.Url, keyword, string(inputitem))
req.Data = []byte(strings.ReplaceAll(string(req.Data), keyword, string(inputitem)))
}
req.Input = input
return req, nil
}
func (r *SimpleRunner) Execute(req *ffuf.Request) (ffuf.Response, error) {
var httpreq *http.Request
var err error
var rawreq []byte
data := bytes.NewReader(req.Data)
var start time.Time
var firstByteTime time.Duration
trace := &httptrace.ClientTrace{
WroteRequest: func(wri httptrace.WroteRequestInfo) {
start = time.Now() // begin the timer after the request is fully written
},
GotFirstResponseByte: func() {
firstByteTime = time.Since(start) // record when the first byte of the response was received
},
}
httpreq, err = http.NewRequestWithContext(r.config.Context, req.Method, req.Url, data)
if err != nil {
return ffuf.Response{}, err
}
// set default User-Agent header if not present
if _, ok := req.Headers["User-Agent"]; !ok {
req.Headers["User-Agent"] = fmt.Sprintf("%s v%s", "Fuzz Faster U Fool", ffuf.Version())
}
// Handle Go http.Request special cases
if _, ok := req.Headers["Host"]; ok {
httpreq.Host = req.Headers["Host"]
}
req.Host = httpreq.Host
httpreq = httpreq.WithContext(httptrace.WithClientTrace(r.config.Context, trace))
for k, v := range req.Headers {
httpreq.Header.Set(k, v)
}
if len(r.config.OutputDirectory) > 0 {
rawreq, _ = httputil.DumpRequestOut(httpreq, true)
}
httpresp, err := r.client.Do(httpreq)
if err != nil {
return ffuf.Response{}, err
}
resp := ffuf.NewResponse(httpresp, req)
defer httpresp.Body.Close()
// Check if we should download the resource or not
size, err := strconv.Atoi(httpresp.Header.Get("Content-Length"))
if err == nil {
resp.ContentLength = int64(size)
if (r.config.IgnoreBody) || (size > MAX_DOWNLOAD_SIZE) {
resp.Cancelled = true
return resp, nil
}
}
if len(r.config.OutputDirectory) > 0 {
rawresp, _ := httputil.DumpResponse(httpresp, true)
resp.Request.Raw = string(rawreq)
resp.Raw = string(rawresp)
}
if respbody, err := ioutil.ReadAll(httpresp.Body); err == nil {
resp.ContentLength = int64(len(string(respbody)))
resp.Data = respbody
}
wordSeperator := " "
lineSeperator := "\n"
if strings.Contains(httpresp.Header.Get("Content-Type"), "json") {
wordSeperator = "{"
lineSeperator = "\","
}
if strings.Contains(httpresp.Header.Get("Content-Type"), "xml") {
wordSeperator = "<"
}
if strings.Contains(httpresp.Header.Get("Content-Type"), "javascript") {
wordSeperator = "("
lineSeperator = "})"
}
wordsSize := len(strings.Split(string(resp.Data), wordSeperator))
linesSize := len(strings.Split(string(resp.Data), lineSeperator))
if wordsSize <= 1 {
wordsSize = len(strings.Split(string(resp.Data), " "))
}
if linesSize <= 1 {
linesSize = len(strings.Split(string(resp.Data), "\n"))
}
resp.ContentWords = int64(wordsSize)
resp.ContentLines = int64(linesSize)
resp.Time = firstByteTime
return resp, nil
}