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mitm_config.go
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mitm_config.go
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package crep
import (
"bufio"
"bytes"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"encoding/pem"
"net/http"
"net/url"
"time"
log "github.com/yaklang/yaklang/common/log"
"github.com/yaklang/yaklang/common/minimartian"
"github.com/yaklang/yaklang/common/minimartian/h2"
"github.com/yaklang/yaklang/common/minimartian/mitm"
"github.com/yaklang/yaklang/common/utils"
"github.com/yaklang/yaklang/common/utils/lowhttp"
"github.com/yaklang/yaklang/common/utils/lowhttp/httpctx"
)
// request modifier
func NewRequestModifier(f minimartian.RequestModifierFunc) minimartian.RequestModifier {
return &requestModifierFunc{f: f}
}
type requestModifierFunc struct {
f minimartian.RequestModifierFunc
}
func (r *requestModifierFunc) ModifyRequest(req *http.Request) error {
return r.f(req)
}
// response modifier
func NewResponseModifier(f minimartian.ResponseModifierFunc) minimartian.ResponseModifier {
return &responseModifierFunc{f: f}
}
type responseModifierFunc struct {
f minimartian.ResponseModifierFunc
}
func (r *responseModifierFunc) ModifyResponse(req *http.Response) error {
return r.f(req)
}
// config
type MITMConfig func(server *MITMServer) error
func MITM_SetHijackedMaxContentLength(i int) MITMConfig {
return func(server *MITMServer) error {
server.hijackedMaxContentLength = i
if i <= 0 {
server.hijackedMaxContentLength = 10 * 1000 * 1000
}
return nil
}
}
func MITM_MutualTLSClient(crt, key []byte, cas ...[]byte) MITMConfig {
return func(server *MITMServer) error {
server.clientCerts = append(server.clientCerts, NewClientCertificationPair(crt, key, cas...))
return nil
}
}
func MITM_SetCaCertAndPrivKey(ca []byte, key []byte) MITMConfig {
return func(server *MITMServer) error {
if ca == nil || key == nil {
return MITM_SetCaCertAndPrivKey(defaultCA, defaultKey)(server)
}
c, err := tls.X509KeyPair(ca, key)
if err != nil {
// if not pem blocks
// try to parse as der
caDer, err := x509.ParseCertificate(ca)
if err != nil {
return utils.Errorf("parse ca[pem/der] failed: %s", err)
}
ca = pem.EncodeToMemory(&pem.Block{Type: `CERTIFICATE`, Bytes: caDer.Raw})
keyDer, err := x509.ParsePKCS8PrivateKey(key)
if err != nil {
log.Warnf("parse key[pem/der] pkcs8 pkey failed: %s", err)
keyDer, err = x509.ParsePKCS1PrivateKey(key)
if err != nil {
return utils.Errorf("parse key[pem/der] pkcs1/pkcs8 pkey failed: %s", err)
}
// pkcs1
key = pem.EncodeToMemory(&pem.Block{Type: `RSA PRIVATE KEY`, Bytes: x509.MarshalPKCS1PrivateKey(keyDer.(*rsa.PrivateKey))})
} else {
// pkcs8
keyRawBytes, err := x509.MarshalPKCS8PrivateKey(keyDer)
if err != nil {
return utils.Errorf("marshal key[pem/der] pkcs8 pkey failed: %s", err)
}
key = pem.EncodeToMemory(&pem.Block{Type: `PRIVATE KEY`, Bytes: keyRawBytes})
}
c, err = tls.X509KeyPair(ca, key)
if err != nil {
return utils.Errorf("parse ca and privKey (DER) failed: %s", err)
}
}
cert, err := x509.ParseCertificate(c.Certificate[0])
if err != nil {
return utils.Errorf("extract x509 cert failed: %s", err)
}
mc, err := mitm.NewConfig(cert, c.PrivateKey)
if err != nil {
return utils.Errorf("build private key failed: %s", err)
}
mc.SkipTLSVerify(true)
mc.SetOrganization("MITMServer")
mc.SetValidity(time.Hour * 24 * 90)
// add default config for H2 support
defaultH2Config := new(h2.Config)
if log.GetLevel() == log.DebugLevel {
defaultH2Config.EnableDebugLogs = true // for DEBUG and DEV only
}
certPool, err := x509.SystemCertPool()
if err != nil {
log.Fatal("Failed to retrieve system certificates pool")
}
certPool.AddCert(cert) // even though user may not add yak certificate yet, we add it manually
defaultH2Config.RootCAs = certPool
defaultH2Config.AllowedHostsFilter = func(_ string) bool { return true }
mc.SetH2Config(defaultH2Config)
server.caCert = ca
server.caKey = key
server.mitmConfig = mc
return nil
}
}
func MITM_SetVia(s string) MITMConfig {
return func(server *MITMServer) error {
server.via = s
return nil
}
}
func MITM_SetXForwarded(b bool) MITMConfig {
return func(server *MITMServer) error {
server.allowForwarded = b
return nil
}
}
type PKCS12Config struct {
Path string
Password string
}
func MITM_SetHTTP2(b bool) MITMConfig {
return func(server *MITMServer) error {
server.http2 = b
return nil
}
}
func MITM_SetGM(b bool) MITMConfig {
return func(server *MITMServer) error {
server.gmtls = b
return nil
}
}
func MITM_SetGMPrefer(b bool) MITMConfig {
return func(server *MITMServer) error {
server.gmPrefer = b
return nil
}
}
func MITM_SetGMOnly(b bool) MITMConfig {
return func(server *MITMServer) error {
server.gmOnly = b
return nil
}
}
func MITM_SetHTTPForceClose(b bool) MITMConfig {
return func(server *MITMServer) error {
server.forceDisableKeepAlive = b
return nil
}
}
func MITM_MergeOptions(b ...MITMConfig) MITMConfig {
return func(server *MITMServer) error {
for _, c := range b {
err := c(server)
if err != nil {
return err
}
}
return nil
}
}
func MITM_SetDownstreamProxy(s string) MITMConfig {
return func(server *MITMServer) error {
if s == "" {
server.proxyUrl = nil
return nil
}
urlRaw, err := url.Parse(s)
if err != nil {
return utils.Errorf("parse proxy url: %v failed: %s", s, err)
}
log.Infof("set downstream proxy as %v", urlRaw.String())
server.proxyUrl = urlRaw
return nil
}
}
func MITM_SetHTTPRequestHijackRaw(c func(isHttps bool, reqIns *http.Request, req []byte) []byte) MITMConfig {
return func(server *MITMServer) error {
server.requestHijackHandler = c
return nil
}
}
func MITM_SetHTTPResponseHijackRaw(c func(isHttps bool, req *http.Request, rspInstance *http.Response, rsp []byte, remoteAddr string) []byte) MITMConfig {
return func(server *MITMServer) error {
server.responseHijackHandler = c
return nil
}
}
func MITM_ProxyAuth(username string, password string) MITMConfig {
return func(server *MITMServer) error {
if username == "" || password == "" {
return nil
}
server.proxyAuth = &ProxyAuth{
Username: username,
Password: password,
}
return nil
}
}
func MITM_SetHTTPRequestHijack(c func(isHttps bool, req *http.Request) *http.Request) MITMConfig {
return func(server *MITMServer) error {
server.requestHijackHandler = func(isHttps bool, reqOrigin *http.Request, req []byte) []byte {
reqIns, err := lowhttp.ParseBytesToHttpRequest(req)
if err != nil {
log.Errorf("unmarshal requests bytes to http.Request failed: %s", err)
return req
}
hijackedReq := c(isHttps, reqIns)
hijackedReq, err = utils.FixHTTPRequestForHTTPDoWithHttps(hijackedReq, isHttps)
if err != nil {
log.Errorf("fix hijacked req: http.Request failed: %v", err)
return req
}
raw, err := utils.HttpDumpWithBody(hijackedReq, true)
if err != nil {
log.Errorf("dump/marshal hijacked http.Request to bytes failed: %s", err)
return req
}
return raw
}
return nil
}
}
func MITM_SetHTTPResponseMirrorInstance(f func(isHttps bool, req, rsp []byte, remoteAddr string, response *http.Response)) MITMConfig {
return func(server *MITMServer) error {
server.httpFlowMirror = func(isHttps bool, r *http.Request, rsp *http.Response, startTs int64) {
f(isHttps, httpctx.GetPlainRequestBytes(r), httpctx.GetPlainResponseBytes(rsp.Request), r.RemoteAddr, rsp)
}
return nil
}
}
func MITM_SetHTTPResponseMirror(f func(bool, string, *http.Request, *http.Response, string)) MITMConfig {
return MITM_SetHTTPResponseMirrorInstance(func(isHttps bool, req, rsp []byte, remoteAddr string, response *http.Response) {
urlStr := httpctx.GetRequestURL(response.Request)
if urlStr == "" {
u, _ := lowhttp.ExtractURLFromHTTPRequest(response.Request, isHttps)
if u != nil {
urlStr = u.String()
}
httpctx.SetRequestURL(response.Request, urlStr)
}
f(isHttps, urlStr, response.Request, response, remoteAddr)
})
}
func MITM_SetTransparentHijackMode(t bool) MITMConfig {
return func(server *MITMServer) error {
if server.transparentHijackMode == nil {
server.transparentHijackMode = utils.NewAtomicBool()
server.transparentHijackMode.SetTo(t)
}
return nil
}
}
type (
MITMTransparentHijackFunc func(isHttps bool, data []byte) []byte
MITMTransparentHijackHTTPRequestFunc func(isHttps bool, data *http.Request) *http.Request
MITMTransparentHijackHTTPResponseFunc func(isHttps bool, data *http.Response) *http.Response
MITMTransparentMirrorFunc func(isHttps bool, req []byte, rsp []byte)
MITMTransparentMirrorHTTPFunc func(isHttps bool, req *http.Request, rsp *http.Response)
)
func MITM_SetTransparentHijackRequest(f MITMTransparentHijackFunc) MITMConfig {
return func(server *MITMServer) error {
if server.transparentHijackRequestManager != nil {
return utils.Errorf("hijacked request manager have been set")
}
server.transparentHijackRequest = f
return nil
}
}
func MITM_SetTransparentHijackHTTPRequest(f MITMTransparentHijackHTTPRequestFunc) MITMConfig {
return MITM_SetTransparentHijackRequest(func(isHttps bool, req []byte) []byte {
rp, err := utils.ReadHTTPRequestFromBytes(req)
if err != nil {
log.Errorf("[MITM-transparent CONFIG] parse request to *http.Request failed: %s", err)
return nil
}
if isHttps {
rp.URL.Scheme = "https"
} else {
rp.URL.Scheme = "http"
}
reqInstance := f(isHttps, rp)
raw, err := utils.HttpDumpWithBody(reqInstance, true)
if err != nil {
log.Errorf("[MITM-transparent CONFIG] parse *http.Request to []byte failed: %s", err)
return nil
}
return raw
})
}
func MITM_SetTransparentHijackResponse(f MITMTransparentHijackFunc) MITMConfig {
return func(server *MITMServer) error {
server.transparentHijackResponse = f
return nil
}
}
func MITM_SetTransparentHijackHTTPResponse(f MITMTransparentHijackHTTPResponseFunc) MITMConfig {
return MITM_SetTransparentHijackResponse(func(isHttps bool, rsp []byte) []byte {
rp, err := utils.ReadHTTPResponseFromBufioReader(bufio.NewReader(bytes.NewReader(rsp)), nil)
if err != nil {
log.Errorf("[MITM-transparent CONFIG] parse response to *http.Response failed: %s", err)
return nil
}
rspInstance := f(isHttps, rp)
raw, err := utils.DumpHTTPResponse(rspInstance, true)
if err != nil {
log.Errorf("[MITM-transparent CONFIG] parse *http.Response to []byte failed: %s", err)
return nil
}
return raw
})
}
func MITM_SetTransparentHijackedMirror(f MITMTransparentMirrorFunc) MITMConfig {
return func(server *MITMServer) error {
server.transparentHijackedMirror = f
return nil
}
}
func MITM_SetTransparentHijackedMirrorHTTP(f MITMTransparentMirrorHTTPFunc) MITMConfig {
return MITM_SetTransparentHijackedMirror(func(isHttps bool, req []byte, rsp []byte) {
rq, err := utils.ReadHTTPRequestFromBytes(req)
if err != nil {
log.Errorf("[MITM-transparent CONFIG] parse request to *http.Request failed: %s", err)
return
}
if isHttps {
rq.URL.Scheme = "https"
} else {
rq.URL.Scheme = "http"
}
rp, err := utils.ReadHTTPResponseFromBufioReader(bufio.NewReader(bytes.NewReader(rsp)), rq)
if err != nil {
log.Errorf("[MITM-transparent CONFIG] parse response to *http.Response failed: %s", err)
return
}
f(isHttps, rq, rp)
})
}
func MITM_SetTransparentMirror(f MITMTransparentMirrorFunc) MITMConfig {
return func(server *MITMServer) error {
server.transparentOriginMirror = f
return nil
}
}
func MITM_SetTransparentMirrorHTTP(f MITMTransparentMirrorHTTPFunc) MITMConfig {
return MITM_SetTransparentMirror(func(isHttps bool, req []byte, rsp []byte) {
rq, err := utils.ReadHTTPRequestFromBytes(req)
if err != nil {
log.Errorf("[MITM-transparent CONFIG] parse request to *http.Request failed: %s", err)
return
}
if isHttps {
rq.URL.Scheme = "https"
} else {
rq.URL.Scheme = "http"
}
rp, err := utils.ReadHTTPResponseFromBufioReader(bufio.NewReader(bytes.NewReader(rsp)), rq)
if err != nil {
log.Errorf("[MITM-transparent CONFIG] parse response to *http.Response failed: %s", err)
return
}
f(isHttps, rq, rp)
})
}
func MITM_SetDNSServers(servers ...string) MITMConfig {
return func(server *MITMServer) error {
server.DNSServers = servers
return nil
}
}
func MITM_SetHostMapping(m map[string]string) MITMConfig {
return func(server *MITMServer) error {
server.HostMapping = m
return nil
}
}
func MITM_SetMaxContentLength(m int64) MITMConfig {
return func(server *MITMServer) error {
server.maxContentLength = int(m)
return nil
}
}
func MITM_AppendDNSServers(servers ...string) MITMConfig {
return func(server *MITMServer) error {
server.DNSServers = utils.RemoveRepeatStringSlice(append(server.DNSServers, servers...))
return nil
}
}
func MITM_SetTransparentHijackRequestManager(m *TransparentHijackManager) MITMConfig {
return func(server *MITMServer) error {
if server.transparentHijackRequest != nil {
return utils.Errorf("transparent hijack request (basic) have been set")
}
server.transparentHijackRequestManager = m
return nil
}
}
// websocket
func MITM_SetWebsocketHijackMode(t bool) MITMConfig {
return func(server *MITMServer) error {
if server.websocketHijackMode == nil {
server.websocketHijackMode = utils.NewAtomicBool()
}
server.websocketHijackMode.SetTo(t)
return nil
}
}
func MITM_SetForceTextFrame(t bool) MITMConfig {
return func(server *MITMServer) error {
if server.forceTextFrame == nil {
server.forceTextFrame = utils.NewAtomicBool()
}
server.forceTextFrame.SetTo(t)
return nil
}
}
func MITM_SetWebsocketRequestHijackRaw(c func(req []byte, r *http.Request, rspIns *http.Response, startTs int64) []byte) MITMConfig {
return func(server *MITMServer) error {
server.websocketRequestHijackHandler = c
return nil
}
}
func MITM_SetWebsocketResponseHijackRaw(c func(rsp []byte, r *http.Request, rspIns *http.Response, startTs int64) []byte) MITMConfig {
return func(server *MITMServer) error {
server.websocketResponseHijackHandler = c
return nil
}
}
func MITM_SetWebsocketRequestMirrorRaw(f func(req []byte)) MITMConfig {
return func(server *MITMServer) error {
server.websocketRequestMirror = f
return nil
}
}
func MITM_SetWebsocketResponseMirrorRaw(f func(req []byte)) MITMConfig {
return func(server *MITMServer) error {
server.websocketResponseMirror = f
return nil
}
}