Add OCSP Stapling for TLS & XTLS (#92)

pull/121/head
eMeab 4 years ago committed by GitHub
parent 6f25191822
commit 3d7e86efba
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

@ -0,0 +1,9 @@
package ocsp
import "github.com/xtls/xray-core/common/errors"
type errPathObjHolder struct{}
func newError(values ...interface{}) *errors.Error {
return errors.New(values...).WithPathObj(errPathObjHolder{})
}

@ -0,0 +1,134 @@
package ocsp
import (
"bytes"
"crypto/x509"
"encoding/pem"
"github.com/xtls/xray-core/common/platform/filesystem"
"golang.org/x/crypto/ocsp"
"io/ioutil"
"net/http"
"os"
)
func GetOCSPForFile(path string) ([]byte, error) {
return filesystem.ReadFile(path)
}
func CheckOCSPFileIsNotExist(path string) bool {
_, err := os.Stat(path)
if err != nil {
return os.IsNotExist(err)
}
return false
}
func GetOCSPStapling(cert [][]byte, path string) ([]byte, error) {
ocspData, err := GetOCSPForFile(path)
if err != nil {
ocspData, err = GetOCSPForCert(cert)
if !CheckOCSPFileIsNotExist(path) {
err = os.Remove(path)
if err != nil {
return nil, err
}
}
newFile, err := os.Create(path)
if err != nil {
return nil, err
}
newFile.Write(ocspData)
defer newFile.Close()
}
return ocspData, nil
}
func GetOCSPForCert(cert [][]byte) ([]byte, error) {
bundle := new(bytes.Buffer)
for _, derBytes := range cert {
err := pem.Encode(bundle, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
if err != nil {
return nil, err
}
}
pemBundle := bundle.Bytes()
certificates, err := parsePEMBundle(pemBundle)
if err != nil {
return nil, err
}
issuedCert := certificates[0]
if len(issuedCert.OCSPServer) == 0 {
return nil, newError("no OCSP server specified in cert")
}
if len(certificates) == 1 {
if len(issuedCert.IssuingCertificateURL) == 0 {
return nil, newError("no issuing certificate URL")
}
resp, errC := http.Get(issuedCert.IssuingCertificateURL[0])
if errC != nil {
return nil, newError("no issuing certificate URL")
}
defer resp.Body.Close()
issuerBytes, errC := ioutil.ReadAll(resp.Body)
if errC != nil {
return nil, newError(errC)
}
issuerCert, errC := x509.ParseCertificate(issuerBytes)
if errC != nil {
return nil, newError(errC)
}
certificates = append(certificates, issuerCert)
}
issuerCert := certificates[1]
ocspReq, err := ocsp.CreateRequest(issuedCert, issuerCert, nil)
if err != nil {
return nil, err
}
reader := bytes.NewReader(ocspReq)
req, err := http.Post(issuedCert.OCSPServer[0], "application/ocsp-request", reader)
if err != nil {
return nil, newError(err)
}
defer req.Body.Close()
ocspResBytes, err := ioutil.ReadAll(req.Body)
if err != nil {
return nil, newError(err)
}
return ocspResBytes, nil
}
// parsePEMBundle parses a certificate bundle from top to bottom and returns
// a slice of x509 certificates. This function will error if no certificates are found.
func parsePEMBundle(bundle []byte) ([]*x509.Certificate, error) {
var certificates []*x509.Certificate
var certDERBlock *pem.Block
for {
certDERBlock, bundle = pem.Decode(bundle)
if certDERBlock == nil {
break
}
if certDERBlock.Type == "CERTIFICATE" {
cert, err := x509.ParseCertificate(certDERBlock.Bytes)
if err != nil {
return nil, err
}
certificates = append(certificates, cert)
}
}
if len(certificates) == 0 {
return nil, newError("no certificates were found while parsing the bundle")
}
return certificates, nil
}

@ -252,6 +252,7 @@ type TLSCertConfig struct {
KeyFile string `json:"keyFile"`
KeyStr []string `json:"key"`
Usage string `json:"usage"`
OcspStapling int64 `json:"ocspStapling"`
}
// Build implements Buildable.
@ -282,7 +283,7 @@ func (c *TLSCertConfig) Build() (*tls.Certificate, error) {
default:
certificate.Usage = tls.Certificate_ENCIPHERMENT
}
certificate.OcspStapling = c.OcspStapling
return certificate, nil
}
@ -333,6 +334,7 @@ type XTLSCertConfig struct {
KeyFile string `json:"keyFile"`
KeyStr []string `json:"key"`
Usage string `json:"usage"`
OcspStapling int64 `json:"ocspStapling"`
}
// Build implements Buildable.
@ -363,7 +365,7 @@ func (c *XTLSCertConfig) Build() (*xtls.Certificate, error) {
default:
certificate.Usage = xtls.Certificate_ENCIPHERMENT
}
certificate.OcspStapling = c.OcspStapling
return certificate, nil
}

@ -1,8 +1,10 @@
package tls
import (
"bytes"
"crypto/tls"
"crypto/x509"
"github.com/xtls/xray-core/common/ocsp"
"strings"
"sync"
"time"
@ -43,7 +45,7 @@ func (c *Config) loadSelfCertPool() (*x509.CertPool, error) {
// BuildCertificates builds a list of TLS certificates from proto definition.
func (c *Config) BuildCertificates() []tls.Certificate {
certs := make([]tls.Certificate, 0, len(c.Certificate))
for _, entry := range c.Certificate {
for i, entry := range c.Certificate {
if entry.Usage != Certificate_ENCIPHERMENT {
continue
}
@ -53,6 +55,24 @@ func (c *Config) BuildCertificates() []tls.Certificate {
continue
}
certs = append(certs, keyPair)
if entry.OcspStapling != 0 {
*&certs[i].OCSPStaple, _ = ocsp.GetOCSPForCert(keyPair.Certificate)
go func(ocspData *[]byte) {
t := time.NewTicker(time.Second * time.Duration(entry.OcspStapling))
for {
select {
case <-t.C:
newOCSPData, err := ocsp.GetOCSPForCert(keyPair.Certificate)
if err != nil {
newError("ignoring invalid OCSP").Base(err).AtWarning().WriteToLog()
}
if len(newOCSPData) != len(*ocspData) && !bytes.Equal(*ocspData, newOCSPData) {
*ocspData = newOCSPData
}
}
}
}(&certs[i].OCSPStaple)
}
}
return certs
}

@ -84,6 +84,7 @@ type Certificate struct {
// TLS key in x509 format.
Key []byte `protobuf:"bytes,2,opt,name=Key,proto3" json:"Key,omitempty"`
Usage Certificate_Usage `protobuf:"varint,3,opt,name=usage,proto3,enum=xray.transport.internet.tls.Certificate_Usage" json:"usage,omitempty"`
OcspStapling int64 `protobuf:"varint,4,opt,name=ocspStapling,proto3" json:"ocspStapling,omitempty"`
}
func (x *Certificate) Reset() {
@ -139,6 +140,13 @@ func (x *Certificate) GetUsage() Certificate_Usage {
return Certificate_ENCIPHERMENT
}
func (x *Certificate) GetOcspStapling() int64 {
if x != nil {
return x.OcspStapling
}
return 0
}
type Config struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
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}
var (

@ -20,6 +20,8 @@ message Certificate {
}
Usage usage = 3;
int64 ocspStapling = 4;
}
message Config {

@ -2,6 +2,7 @@ package xtls
import (
"crypto/x509"
"github.com/xtls/xray-core/common/ocsp"
"strings"
"sync"
"time"
@ -42,7 +43,7 @@ func (c *Config) loadSelfCertPool() (*x509.CertPool, error) {
// BuildCertificates builds a list of TLS certificates from proto definition.
func (c *Config) BuildCertificates() []xtls.Certificate {
certs := make([]xtls.Certificate, 0, len(c.Certificate))
for _, entry := range c.Certificate {
for i, entry := range c.Certificate {
if entry.Usage != Certificate_ENCIPHERMENT {
continue
}
@ -52,6 +53,21 @@ func (c *Config) BuildCertificates() []xtls.Certificate {
continue
}
certs = append(certs, keyPair)
if entry.OcspStapling != 0 {
*&certs[i].OCSPStaple, _ = ocsp.GetOCSPForCert(keyPair.Certificate)
go func(ocspData *[]byte) {
t := time.NewTicker(time.Second * time.Duration(entry.OcspStapling))
for {
select {
case <-t.C:
*ocspData, err = ocsp.GetOCSPForCert(keyPair.Certificate)
if err != nil {
newError("ignoring invalid OCSP").Base(err).AtWarning().WriteToLog()
}
}
}
}(&certs[i].OCSPStaple)
}
}
return certs
}

@ -84,6 +84,7 @@ type Certificate struct {
// TLS key in x509 format.
Key []byte `protobuf:"bytes,2,opt,name=Key,proto3" json:"Key,omitempty"`
Usage Certificate_Usage `protobuf:"varint,3,opt,name=usage,proto3,enum=xray.transport.internet.xtls.Certificate_Usage" json:"usage,omitempty"`
OcspStapling int64 `protobuf:"varint,4,opt,name=ocspStapling,proto3" json:"ocspStapling,omitempty"`
}
func (x *Certificate) Reset() {
@ -139,6 +140,13 @@ func (x *Certificate) GetUsage() Certificate_Usage {
return Certificate_ENCIPHERMENT
}
func (x *Certificate) GetOcspStapling() int64 {
if x != nil {
return x.OcspStapling
}
return 0
}
type Config struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@ -276,7 +284,7 @@ var file_transport_internet_xtls_config_proto_rawDesc = []byte{
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}
var (

@ -20,6 +20,8 @@ message Certificate {
}
Usage usage = 3;
int64 ocspStapling = 4;
}
message Config {

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