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Verify peer cert function for better man in the middle prevention (#746)

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* verify peer cert function for better man in the middle prevention

* publish cert chain hash generation algorithm

* added calculation of certificate hash as separate command and tlsping, use base64 to represent fingerprint to align with jsonPb

* apply coding style

* added test case for pinned certificates

* refactored cert pin

* pinned cert test

* added json loading of the PinnedPeerCertificateChainSha256

* removed tool to prepare for v5

* Add server cert pinning for Xtls

Change command "xray tls certChainHash" to xray style

Co-authored-by: Shelikhoo <xiaokangwang@outlook.com>
This commit is contained in:
yuhan6665 2021-10-22 00:04:06 -04:00 committed by 世界
parent 6a60332700
commit acb81ebe3d
No known key found for this signature in database
GPG key ID: CD109927C34A63C4
13 changed files with 447 additions and 35 deletions
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73
infra/conf/transport_internet.go
View file

@ -1,6 +1,7 @@
package conf
import (
"encoding/base64"
"encoding/json"
"math"
"net/url"
@ -338,18 +339,19 @@ func (c *TLSCertConfig) Build() (*tls.Certificate, error) {
}
type TLSConfig struct {
Insecure bool `json:"allowInsecure"`
Certs []*TLSCertConfig `json:"certificates"`
ServerName string `json:"serverName"`
ALPN *StringList `json:"alpn"`
EnableSessionResumption bool `json:"enableSessionResumption"`
DisableSystemRoot bool `json:"disableSystemRoot"`
MinVersion string `json:"minVersion"`
MaxVersion string `json:"maxVersion"`
CipherSuites string `json:"cipherSuites"`
PreferServerCipherSuites bool `json:"preferServerCipherSuites"`
Fingerprint string `json:"fingerprint"`
RejectUnknownSNI bool `json:"rejectUnknownSni"`
Insecure bool `json:"allowInsecure"`
Certs []*TLSCertConfig `json:"certificates"`
ServerName string `json:"serverName"`
ALPN *StringList `json:"alpn"`
EnableSessionResumption bool `json:"enableSessionResumption"`
DisableSystemRoot bool `json:"disableSystemRoot"`
MinVersion string `json:"minVersion"`
MaxVersion string `json:"maxVersion"`
CipherSuites string `json:"cipherSuites"`
PreferServerCipherSuites bool `json:"preferServerCipherSuites"`
Fingerprint string `json:"fingerprint"`
RejectUnknownSNI bool `json:"rejectUnknownSni"`
PinnedPeerCertificateChainSha256 *[]string `json:"pinnedPeerCertificateChainSha256"`
}
// Build implements Buildable.
@ -379,6 +381,18 @@ func (c *TLSConfig) Build() (proto.Message, error) {
config.PreferServerCipherSuites = c.PreferServerCipherSuites
config.Fingerprint = strings.ToLower(c.Fingerprint)
config.RejectUnknownSni = c.RejectUnknownSNI
if c.PinnedPeerCertificateChainSha256 != nil {
config.PinnedPeerCertificateChainSha256 = [][]byte{}
for _, v := range *c.PinnedPeerCertificateChainSha256 {
hashValue, err := base64.StdEncoding.DecodeString(v)
if err != nil {
return nil, err
}
config.PinnedPeerCertificateChainSha256 = append(config.PinnedPeerCertificateChainSha256, hashValue)
}
}
return config, nil
}
@ -432,17 +446,18 @@ func (c *XTLSCertConfig) Build() (*xtls.Certificate, error) {
}
type XTLSConfig struct {
Insecure bool `json:"allowInsecure"`
Certs []*XTLSCertConfig `json:"certificates"`
ServerName string `json:"serverName"`
ALPN *StringList `json:"alpn"`
EnableSessionResumption bool `json:"enableSessionResumption"`
DisableSystemRoot bool `json:"disableSystemRoot"`
MinVersion string `json:"minVersion"`
MaxVersion string `json:"maxVersion"`
CipherSuites string `json:"cipherSuites"`
PreferServerCipherSuites bool `json:"preferServerCipherSuites"`
RejectUnknownSNI bool `json:"rejectUnknownSni"`
Insecure bool `json:"allowInsecure"`
Certs []*XTLSCertConfig `json:"certificates"`
ServerName string `json:"serverName"`
ALPN *StringList `json:"alpn"`
EnableSessionResumption bool `json:"enableSessionResumption"`
DisableSystemRoot bool `json:"disableSystemRoot"`
MinVersion string `json:"minVersion"`
MaxVersion string `json:"maxVersion"`
CipherSuites string `json:"cipherSuites"`
PreferServerCipherSuites bool `json:"preferServerCipherSuites"`
RejectUnknownSNI bool `json:"rejectUnknownSni"`
PinnedPeerCertificateChainSha256 *[]string `json:"pinnedPeerCertificateChainSha256"`
}
// Build implements Buildable.
@ -471,6 +486,18 @@ func (c *XTLSConfig) Build() (proto.Message, error) {
config.CipherSuites = c.CipherSuites
config.PreferServerCipherSuites = c.PreferServerCipherSuites
config.RejectUnknownSni = c.RejectUnknownSNI
if c.PinnedPeerCertificateChainSha256 != nil {
config.PinnedPeerCertificateChainSha256 = [][]byte{}
for _, v := range *c.PinnedPeerCertificateChainSha256 {
hashValue, err := base64.StdEncoding.DecodeString(v)
if err != nil {
return nil, err
}
config.PinnedPeerCertificateChainSha256 = append(config.PinnedPeerCertificateChainSha256, hashValue)
}
}
return config, nil
}

41
main/commands/all/tls/certchainhash.go Normal file
View file

@ -0,0 +1,41 @@
package tls
import (
"flag"
"fmt"
"io/ioutil"
"github.com/xtls/xray-core/main/commands/base"
"github.com/xtls/xray-core/transport/internet/tls"
)
var cmdCertChainHash = &base.Command{
UsageLine: "{{.Exec}} certChainHash",
Short: "Calculate TLS certificates hash.",
Long: `
xray tls certChainHash --cert <cert.pem>
Calculate TLS certificate chain hash.
`,
}
func init() {
cmdCertChainHash.Run = executeCertChainHash // break init loop
}
var input = cmdCertChainHash.Flag.String("cert", "fullchain.pem", "The file path of the certificates chain")
func executeCertChainHash(cmd *base.Command, args []string) {
fs := flag.NewFlagSet("certChainHash", flag.ContinueOnError)
if err := fs.Parse(args); err != nil {
fmt.Println(err)
return
}
certContent, err := ioutil.ReadFile(*input)
if err != nil {
fmt.Println(err)
return
}
certChainHashB64 := tls.CalculatePEMCertChainSHA256Hash(certContent)
fmt.Println(certChainHashB64)
return
}

28
main/commands/all/tls/ping.go
View file

@ -1,12 +1,14 @@
package tls
import (
"crypto/tls"
gotls "crypto/tls"
"crypto/x509"
"encoding/base64"
"fmt"
"net"
"github.com/xtls/xray-core/main/commands/base"
. "github.com/xtls/xray-core/transport/internet/tls"
)
// cmdPing is the tls ping command
@ -60,11 +62,13 @@ func executePing(cmd *base.Command, args []string) {
if err != nil {
base.Fatalf("Failed to dial tcp: %s", err)
}
tlsConn := tls.Client(tcpConn, &tls.Config{
tlsConn := gotls.Client(tcpConn, &gotls.Config{
InsecureSkipVerify: true,
NextProtos: []string{"http/1.1"},
MaxVersion: tls.VersionTLS12,
MinVersion: tls.VersionTLS12,
MaxVersion: gotls.VersionTLS12,
MinVersion: gotls.VersionTLS12,
// Do not release tool before v5's refactor
// VerifyPeerCertificate: showCert(),
})
err = tlsConn.Handshake()
if err != nil {
@ -83,11 +87,13 @@ func executePing(cmd *base.Command, args []string) {
if err != nil {
base.Fatalf("Failed to dial tcp: %s", err)
}
tlsConn := tls.Client(tcpConn, &tls.Config{
tlsConn := gotls.Client(tcpConn, &gotls.Config{
ServerName: domain,
NextProtos: []string{"http/1.1"},
MaxVersion: tls.VersionTLS12,
MinVersion: tls.VersionTLS12,
MaxVersion: gotls.VersionTLS12,
MinVersion: gotls.VersionTLS12,
// Do not release tool before v5's refactor
// VerifyPeerCertificate: showCert(),
})
err = tlsConn.Handshake()
if err != nil {
@ -110,3 +116,11 @@ func printCertificates(certs []*x509.Certificate) {
fmt.Println("Allowed domains: ", cert.DNSNames)
}
}
func showCert() func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
return func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
hash := GenerateCertChainHash(rawCerts)
fmt.Println("Certificate Chain Hash: ", base64.StdEncoding.EncodeToString(hash))
return nil
}
}

1
main/commands/all/tls/tls.go
View file

@ -13,5 +13,6 @@ var CmdTLS = &base.Command{
Commands: []*base.Command{
cmdCert,
cmdPing,
cmdCertChainHash,
},
}

103
testing/scenarios/tls_test.go
View file

@ -826,3 +826,106 @@ func TestGRPCMultiMode(t *testing.T) {
t.Error(err)
}
}
func TestSimpleTLSConnectionPinned(t *testing.T) {
tcpServer := tcp.Server{
MsgProcessor: xor,
}
dest, err := tcpServer.Start()
common.Must(err)
defer tcpServer.Close()
certificateDer := cert.MustGenerate(nil)
certificate := tls.ParseCertificate(certificateDer)
certHash := tls.GenerateCertChainHash([][]byte{certificateDer.Certificate})
userID := protocol.NewID(uuid.New())
serverPort := tcp.PickPort()
serverConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
PortRange: net.SinglePortRange(serverPort),
Listen: net.NewIPOrDomain(net.LocalHostIP),
StreamSettings: &internet.StreamConfig{
SecurityType: serial.GetMessageType(&tls.Config{}),
SecuritySettings: []*serial.TypedMessage{
serial.ToTypedMessage(&tls.Config{
Certificate: []*tls.Certificate{certificate},
}),
},
},
}),
ProxySettings: serial.ToTypedMessage(&inbound.Config{
User: []*protocol.User{
{
Account: serial.ToTypedMessage(&vmess.Account{
Id: userID.String(),
}),
},
},
}),
},
},
Outbound: []*core.OutboundHandlerConfig{
{
ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
},
},
}
clientPort := tcp.PickPort()
clientConfig := &core.Config{
Inbound: []*core.InboundHandlerConfig{
{
ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
PortRange: net.SinglePortRange(clientPort),
Listen: net.NewIPOrDomain(net.LocalHostIP),
}),
ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
Address: net.NewIPOrDomain(dest.Address),
Port: uint32(dest.Port),
NetworkList: &net.NetworkList{
Network: []net.Network{net.Network_TCP},
},
}),
},
},
Outbound: []*core.OutboundHandlerConfig{
{
ProxySettings: serial.ToTypedMessage(&outbound.Config{
Receiver: []*protocol.ServerEndpoint{
{
Address: net.NewIPOrDomain(net.LocalHostIP),
Port: uint32(serverPort),
User: []*protocol.User{
{
Account: serial.ToTypedMessage(&vmess.Account{
Id: userID.String(),
}),
},
},
},
},
}),
SenderSettings: serial.ToTypedMessage(&proxyman.SenderConfig{
StreamSettings: &internet.StreamConfig{
SecurityType: serial.GetMessageType(&tls.Config{}),
SecuritySettings: []*serial.TypedMessage{
serial.ToTypedMessage(&tls.Config{
AllowInsecure: true,
PinnedPeerCertificateChainSha256: [][]byte{certHash},
}),
},
},
}),
},
},
}
servers, err := InitializeServerConfigs(serverConfig, clientConfig)
common.Must(err)
defer CloseAllServers(servers)
if err := testTCPConn(clientPort, 1024, time.Second*2)(); err != nil {
t.Fatal(err)
}
}

16
transport/internet/tls/config.go
View file

@ -1,8 +1,10 @@
package tls
import (
"crypto/hmac"
"crypto/tls"
"crypto/x509"
"encoding/base64"
"strings"
"sync"
"time"
@ -254,6 +256,19 @@ func (c *Config) parseServerName() string {
return c.ServerName
}
func (c *Config) verifyPeerCert(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
if c.PinnedPeerCertificateChainSha256 != nil {
hashValue := GenerateCertChainHash(rawCerts)
for _, v := range c.PinnedPeerCertificateChainSha256 {
if hmac.Equal(hashValue, v) {
return nil
}
}
return newError("peer cert is unrecognized: ", base64.StdEncoding.EncodeToString(hashValue))
}
return nil
}
// GetTLSConfig converts this Config into tls.Config.
func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
root, err := c.getCertPool()
@ -277,6 +292,7 @@ func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
InsecureSkipVerify: c.AllowInsecure,
NextProtos: c.NextProtocol,
SessionTicketsDisabled: !c.EnableSessionResumption,
VerifyPeerCertificate: c.verifyPeerCert,
}
for _, opt := range opts {

21
transport/internet/tls/config.pb.go
View file

@ -198,6 +198,11 @@ type Config struct {
// TLS Client Hello fingerprint (uTLS).
Fingerprint string `protobuf:"bytes,11,opt,name=fingerprint,proto3" json:"fingerprint,omitempty"`
RejectUnknownSni bool `protobuf:"varint,12,opt,name=reject_unknown_sni,json=rejectUnknownSni,proto3" json:"reject_unknown_sni,omitempty"`
// @Document A pinned certificate chain sha256 hash.
//@Document If the server's hash does not match this value, the connection will be aborted.
//@Document This value replace allow_insecure.
//@Critical
PinnedPeerCertificateChainSha256 [][]byte `protobuf:"bytes,13,rep,name=pinned_peer_certificate_chain_sha256,json=pinnedPeerCertificateChainSha256,proto3" json:"pinned_peer_certificate_chain_sha256,omitempty"`
}
func (x *Config) Reset() {
@ -316,6 +321,13 @@ func (x *Config) GetRejectUnknownSni() bool {
return false
}
func (x *Config) GetPinnedPeerCertificateChainSha256() [][]byte {
if x != nil {
return x.PinnedPeerCertificateChainSha256
}
return nil
}
var File_transport_internet_tls_config_proto protoreflect.FileDescriptor
var file_transport_internet_tls_config_proto_rawDesc = []byte{
@ -345,7 +357,7 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x00, 0x12, 0x14, 0x0a, 0x10,
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0x10, 0x01, 0x12, 0x13, 0x0a, 0x0f, 0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f,
0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xa3, 0x04, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xf3, 0x04, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
0x69, 0x67, 0x12, 0x25, 0x0a, 0x0e, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x5f, 0x69, 0x6e, 0x73, 0x65,
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@ -379,7 +391,12 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
0x28, 0x09, 0x52, 0x0b, 0x66, 0x69, 0x6e, 0x67, 0x65, 0x72, 0x70, 0x72, 0x69, 0x6e, 0x74, 0x12,
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7
transport/internet/tls/config.proto
View file

@ -69,4 +69,11 @@ message Config {
string fingerprint = 11;
bool reject_unknown_sni = 12;
/* @Document A pinned certificate chain sha256 hash.
@Document If the server's hash does not match this value, the connection will be aborted.
@Document This value replace allow_insecure.
@Critical
*/
repeated bytes pinned_peer_certificate_chain_sha256 = 13;
}

36
transport/internet/tls/pin.go Normal file
View file

@ -0,0 +1,36 @@
package tls
import (
"crypto/sha256"
"encoding/base64"
"encoding/pem"
)
func CalculatePEMCertChainSHA256Hash(certContent []byte) string {
var certChain [][]byte
for {
block, remain := pem.Decode(certContent)
if block == nil {
break
}
certChain = append(certChain, block.Bytes)
certContent = remain
}
certChainHash := GenerateCertChainHash(certChain)
certChainHashB64 := base64.StdEncoding.EncodeToString(certChainHash)
return certChainHashB64
}
func GenerateCertChainHash(rawCerts [][]byte) []byte {
var hashValue []byte
for _, certValue := range rawCerts {
out := sha256.Sum256(certValue)
if hashValue == nil {
hashValue = out[:]
} else {
newHashValue := sha256.Sum256(append(hashValue, out[:]...))
hashValue = newHashValue[:]
}
}
return hashValue
}

110
transport/internet/tls/pin_test.go Normal file
View file

@ -0,0 +1,110 @@
package tls
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestCalculateCertHash(t *testing.T) {
/* This is used to make sure that the hash signature generated is consistent
Do NOT change this test to suit your modification.
*/
const CertBundle = `
-----BEGIN CERTIFICATE-----
MIIFJjCCBA6gAwIBAgISBL8FgUdEcVYEjdMkTZPgC3ocMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yMTAzMjkwMTM2MzlaFw0yMTA2MjcwMTM2MzlaMBsxGTAXBgNVBAMT
EHNlY3VyZS5ra2Rldi5vcmcwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIB
AQDOF/j+s7rHaDMXdhYjffoOFjNZb7n3sCuvubI3qOcgJmr1WPlCEry50KoY8FaB
IF2HstMIZceN4NoUK7mr3WAvsQTA47uBfuhp+XQmAQW0T/fYD+XbvxtCENEin+xm
JsvTKZLTKbE08E964J4H+1sBmueP6rvy2Wt95z0XkqoQiikpmLE87WdltQcATvVX
qqrL64hV0nN4Hdi2Bv1cQ92aR7lZGj8jiQRtTj8y5Ah3Gk3fPoao+yI7gnzembqo
fddePzz/u8iEuvYAsIYZKn9bbS7rkYoJazL2/xiDZR7usn0SomzmM6lGXDD3FF4b
lyTkLYwgFVgbGWoz1+eOHD5BAgMBAAGjggJLMIICRzAOBgNVHQ8BAf8EBAMCBaAw
HQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYD
VR0OBBYEFOPRdApL8XENLXDuU3oPisykGyp+MB8GA1UdIwQYMBaAFBQusxe3WFbL
rlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcwAYYVaHR0cDov
L3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMuaS5sZW5jci5v
cmcvMBsGA1UdEQQUMBKCEHNlY3VyZS5ra2Rldi5vcmcwTAYDVR0gBEUwQzAIBgZn
gQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5s
ZXRzZW5jcnlwdC5vcmcwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdQD2XJQv0Xcw
IhRUGAgwlFaO400TGTO/3wwvIAvMTvFk4wAAAXh71yBGAAAEAwBGMEQCIDmziDOn
ehPY2KoAFX8fPWiCm4EBTbGJXBWF1LCotPJBAiBLSCg+krXvbyoABnTm8knv0hbG
/ZOk8LV6qpw9VoQwGwB3AG9Tdqwx8DEZ2JkApFEV/3cVHBHZAsEAKQaNsgiaN9kT
AAABeHvXIIAAAAQDAEgwRgIhAOkeKc52wR3n5QWZfa3zbbicMMSQrTGbQ+1fHNs7
SsRvAiEAqbflDx1nZRsTA22FfNYfgF6v5Z3/svjiTleWSQad4WswDQYJKoZIhvcN
AQELBQADggEBAEj8tg+Agf5sNBM9CvjeXbA0fkpGDaQzXEkwefAea5vPgKoGiWSN
pHDkyr0i7+mqa7cMXhmmo20V0/+QDv0nrsCw8pgJuviC3GvK6agT6WfkXM2djJuo
osPeXOL9KEF/ATv0EyM5tr9TIoRSSYQoRhuqEdg3Dz9Ii8GXR5HhbYr6Cd7gwNHS
kYeivKDmgv31GHb4twPSE9LZ/U+56lNVvSbJ4csupIF3GnxnxrFSmijYNOPoM6mj
tzY45d4mjPs0fKCFKSsVM6YT0tX4NwIKsOaeQg30WLtRyDwYm6ma/a/UUUS0FloZ
2/p85glOgzownfoRjzTbqHu8ewtMd6Apc0E=
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`
t.Run("bundle", func(t *testing.T) {
hash := CalculatePEMCertChainSHA256Hash([]byte(CertBundle))
assert.Equal(t, "WF65fBkgltadMnXryOMZ6TEYeV4d5Q0uu4SGXGZ0RjI=", hash)
})
const Single = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`
t.Run("single", func(t *testing.T) {
hash := CalculatePEMCertChainSHA256Hash([]byte(Single))
assert.Equal(t, "FW3SVMCL6um2wVltOdgJ3DpI82aredw83YoCblkMkVM=", hash)
})
}

17
transport/internet/xtls/config.go
View file

@ -1,7 +1,9 @@
package xtls
import (
"crypto/hmac"
"crypto/x509"
"encoding/base64"
"strings"
"sync"
"time"
@ -13,6 +15,7 @@ import (
"github.com/xtls/xray-core/common/platform/filesystem"
"github.com/xtls/xray-core/common/protocol/tls/cert"
"github.com/xtls/xray-core/transport/internet"
"github.com/xtls/xray-core/transport/internet/tls"
)
var globalSessionCache = xtls.NewLRUClientSessionCache(128)
@ -244,6 +247,19 @@ func (c *Config) parseServerName() string {
return c.ServerName
}
func (c *Config) verifyPeerCert(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
if c.PinnedPeerCertificateChainSha256 != nil {
hashValue := tls.GenerateCertChainHash(rawCerts)
for _, v := range c.PinnedPeerCertificateChainSha256 {
if hmac.Equal(hashValue, v) {
return nil
}
}
return newError("peer cert is unrecognized: ", base64.StdEncoding.EncodeToString(hashValue))
}
return nil
}
// GetXTLSConfig converts this Config into xtls.Config.
func (c *Config) GetXTLSConfig(opts ...Option) *xtls.Config {
root, err := c.getCertPool()
@ -267,6 +283,7 @@ func (c *Config) GetXTLSConfig(opts ...Option) *xtls.Config {
InsecureSkipVerify: c.AllowInsecure,
NextProtos: c.NextProtocol,
SessionTicketsDisabled: !c.EnableSessionResumption,
VerifyPeerCertificate: c.verifyPeerCert,
}
for _, opt := range opts {

21
transport/internet/xtls/config.pb.go
View file

@ -196,6 +196,11 @@ type Config struct {
// Whether the server selects its most preferred ciphersuite.
PreferServerCipherSuites bool `protobuf:"varint,10,opt,name=prefer_server_cipher_suites,json=preferServerCipherSuites,proto3" json:"prefer_server_cipher_suites,omitempty"`
RejectUnknownSni bool `protobuf:"varint,12,opt,name=reject_unknown_sni,json=rejectUnknownSni,proto3" json:"reject_unknown_sni,omitempty"`
// @Document A pinned certificate chain sha256 hash.
//@Document If the server's hash does not match this value, the connection will be aborted.
//@Document This value replace allow_insecure.
//@Critical
PinnedPeerCertificateChainSha256 [][]byte `protobuf:"bytes,13,rep,name=pinned_peer_certificate_chain_sha256,json=pinnedPeerCertificateChainSha256,proto3" json:"pinned_peer_certificate_chain_sha256,omitempty"`
}
func (x *Config) Reset() {
@ -307,6 +312,13 @@ func (x *Config) GetRejectUnknownSni() bool {
return false
}
func (x *Config) GetPinnedPeerCertificateChainSha256() [][]byte {
if x != nil {
return x.PinnedPeerCertificateChainSha256
}
return nil
}
var File_transport_internet_xtls_config_proto protoreflect.FileDescriptor
var file_transport_internet_xtls_config_proto_rawDesc = []byte{
@ -336,7 +348,7 @@ var file_transport_internet_xtls_config_proto_rawDesc = []byte{
0x0c, 0x45, 0x4e, 0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x00, 0x12,
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@ -368,7 +380,12 @@ var file_transport_internet_xtls_config_proto_rawDesc = []byte{
0x65, 0x72, 0x76, 0x65, 0x72, 0x43, 0x69, 0x70, 0x68, 0x65, 0x72, 0x53, 0x75, 0x69, 0x74, 0x65,
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8
transport/internet/xtls/config.proto
View file

@ -65,6 +65,12 @@ message Config {
// Whether the server selects its most preferred ciphersuite.
bool prefer_server_cipher_suites = 10;
bool reject_unknown_sni = 12;
/* @Document A pinned certificate chain sha256 hash.
@Document If the server's hash does not match this value, the connection will be aborted.
@Document This value replace allow_insecure.
@Critical
*/
repeated bytes pinned_peer_certificate_chain_sha256 = 13;
}