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124 lines
3.0 KiB
Go
124 lines
3.0 KiB
Go
package http_proxy
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import (
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"net/http"
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"strings"
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"github.com/bettercap/bettercap/v2/log"
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"github.com/bettercap/bettercap/v2/session"
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"github.com/robertkrimen/otto"
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"github.com/evilsocket/islazy/plugin"
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)
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type HttpProxyScript struct {
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*plugin.Plugin
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doOnRequest bool
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doOnResponse bool
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doOnCommand bool
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}
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func LoadHttpProxyScript(path string, sess *session.Session) (err error, s *HttpProxyScript) {
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log.Debug("loading proxy script %s ...", path)
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plug, err := plugin.Load(path)
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if err != nil {
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return
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}
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// define session pointer
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if err = plug.Set("env", sess.Env.Data); err != nil {
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log.Error("Error while defining environment: %+v", err)
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return
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}
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// define addSessionEvent function
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err = plug.Set("addSessionEvent", func(call otto.FunctionCall) otto.Value {
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if len(call.ArgumentList) < 2 {
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log.Error("Failed to execute 'addSessionEvent' in HTTP proxy: 2 arguments required, but only %d given.", len(call.ArgumentList))
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return otto.FalseValue()
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}
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ottoTag := call.Argument(0)
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if !ottoTag.IsString() {
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log.Error("Failed to execute 'addSessionEvent' in HTTP proxy: first argument must be a string.")
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return otto.FalseValue()
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}
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tag := strings.TrimSpace(ottoTag.String())
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if tag == "" {
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log.Error("Failed to execute 'addSessionEvent' in HTTP proxy: tag cannot be empty.")
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return otto.FalseValue()
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}
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data := call.Argument(1)
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sess.Events.Add(tag, data)
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return otto.TrueValue()
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})
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if err != nil {
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log.Error("Error while defining addSessionEvent function: %+v", err)
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return
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}
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// run onLoad if defined
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if plug.HasFunc("onLoad") {
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if _, err = plug.Call("onLoad"); err != nil {
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log.Error("Error while executing onLoad callback: %s", "\nTraceback:\n "+err.(*otto.Error).String())
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return
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}
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}
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s = &HttpProxyScript{
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Plugin: plug,
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doOnRequest: plug.HasFunc("onRequest"),
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doOnResponse: plug.HasFunc("onResponse"),
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doOnCommand: plug.HasFunc("onCommand"),
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}
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return
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}
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func (s *HttpProxyScript) OnRequest(original *http.Request) (jsreq *JSRequest, jsres *JSResponse) {
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if s.doOnRequest {
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jsreq := NewJSRequest(original)
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jsres := NewJSResponse(nil)
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if _, err := s.Call("onRequest", jsreq, jsres); err != nil {
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log.Error("%s", err)
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return nil, nil
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} else if jsreq.CheckIfModifiedAndUpdateHash() {
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return jsreq, nil
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} else if jsres.CheckIfModifiedAndUpdateHash() {
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return nil, jsres
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}
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}
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return nil, nil
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}
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func (s *HttpProxyScript) OnResponse(res *http.Response) (jsreq *JSRequest, jsres *JSResponse) {
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if s.doOnResponse {
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jsreq := NewJSRequest(res.Request)
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jsres := NewJSResponse(res)
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if _, err := s.Call("onResponse", jsreq, jsres); err != nil {
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log.Error("%s", err)
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return nil, nil
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} else if jsres.CheckIfModifiedAndUpdateHash() {
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return nil, jsres
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}
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}
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return nil, nil
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}
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func (s *HttpProxyScript) OnCommand(cmd string) bool {
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if s.doOnCommand {
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if ret, err := s.Call("onCommand", cmd); err != nil {
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log.Error("Error while executing onCommand callback: %+v", err)
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return false
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} else if v, ok := ret.(bool); ok {
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return v
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}
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}
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return false
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}
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