mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-12-27 07:59:47 +00:00
361 lines
9.6 KiB
Go
361 lines
9.6 KiB
Go
package xtls
|
|
|
|
import (
|
|
"crypto/x509"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
xtls "github.com/xtls/go"
|
|
|
|
"github.com/xtls/xray-core/common/net"
|
|
"github.com/xtls/xray-core/common/ocsp"
|
|
"github.com/xtls/xray-core/common/platform/filesystem"
|
|
"github.com/xtls/xray-core/common/protocol/tls/cert"
|
|
"github.com/xtls/xray-core/transport/internet"
|
|
)
|
|
|
|
var (
|
|
globalSessionCache = xtls.NewLRUClientSessionCache(128)
|
|
)
|
|
|
|
// ParseCertificate converts a cert.Certificate to Certificate.
|
|
func ParseCertificate(c *cert.Certificate) *Certificate {
|
|
if c != nil {
|
|
certPEM, keyPEM := c.ToPEM()
|
|
return &Certificate{
|
|
Certificate: certPEM,
|
|
Key: keyPEM,
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (c *Config) loadSelfCertPool() (*x509.CertPool, error) {
|
|
root := x509.NewCertPool()
|
|
for _, cert := range c.Certificate {
|
|
if !root.AppendCertsFromPEM(cert.Certificate) {
|
|
return nil, newError("failed to append cert").AtWarning()
|
|
}
|
|
}
|
|
return root, nil
|
|
}
|
|
|
|
// 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 {
|
|
if entry.Usage != Certificate_ENCIPHERMENT {
|
|
continue
|
|
}
|
|
keyPair, err := xtls.X509KeyPair(entry.Certificate, entry.Key)
|
|
if err != nil {
|
|
newError("ignoring invalid X509 key pair").Base(err).AtWarning().WriteToLog()
|
|
continue
|
|
}
|
|
keyPair.Leaf, err = x509.ParseCertificate(keyPair.Certificate[0])
|
|
if err != nil {
|
|
newError("ignoring invalid certificate").Base(err).AtWarning().WriteToLog()
|
|
continue
|
|
}
|
|
certs = append(certs, &keyPair)
|
|
if !entry.OneTimeLoading {
|
|
var isOcspstapling bool
|
|
hotRelodaInterval := uint64(3600)
|
|
if entry.OcspStapling != 0 {
|
|
hotRelodaInterval = entry.OcspStapling
|
|
isOcspstapling = true
|
|
}
|
|
index := len(certs) - 1
|
|
go func(cert *xtls.Certificate, index int) {
|
|
t := time.NewTicker(time.Duration(hotRelodaInterval) * time.Second)
|
|
for {
|
|
if entry.CertificatePath != "" && entry.KeyPath != "" {
|
|
newCert, err := filesystem.ReadFile(entry.CertificatePath)
|
|
if err != nil {
|
|
newError("failed to parse certificate").Base(err).AtError().WriteToLog()
|
|
<-t.C
|
|
continue
|
|
}
|
|
newKey, err := filesystem.ReadFile(entry.KeyPath)
|
|
if err != nil {
|
|
newError("failed to parse key").Base(err).AtError().WriteToLog()
|
|
<-t.C
|
|
continue
|
|
}
|
|
if string(newCert) != string(entry.Certificate) && string(newKey) != string(entry.Key) {
|
|
newKeyPair, err := xtls.X509KeyPair(newCert, newKey)
|
|
if err != nil {
|
|
newError("ignoring invalid X509 key pair").Base(err).AtError().WriteToLog()
|
|
<-t.C
|
|
continue
|
|
}
|
|
if newKeyPair.Leaf, err = x509.ParseCertificate(newKeyPair.Certificate[0]); err != nil {
|
|
newError("ignoring invalid certificate").Base(err).AtError().WriteToLog()
|
|
<-t.C
|
|
continue
|
|
}
|
|
cert = &newKeyPair
|
|
}
|
|
}
|
|
if isOcspstapling {
|
|
if newOCSPData, err := ocsp.GetOCSPForCert(cert.Certificate); err != nil {
|
|
newError("ignoring invalid OCSP").Base(err).AtWarning().WriteToLog()
|
|
} else if string(newOCSPData) != string(cert.OCSPStaple) {
|
|
cert.OCSPStaple = newOCSPData
|
|
}
|
|
}
|
|
certs[index] = cert
|
|
<-t.C
|
|
}
|
|
}(certs[len(certs)-1], index)
|
|
}
|
|
}
|
|
return certs
|
|
}
|
|
|
|
func isCertificateExpired(c *xtls.Certificate) bool {
|
|
if c.Leaf == nil && len(c.Certificate) > 0 {
|
|
if pc, err := x509.ParseCertificate(c.Certificate[0]); err == nil {
|
|
c.Leaf = pc
|
|
}
|
|
}
|
|
|
|
// If leaf is not there, the certificate is probably not used yet. We trust user to provide a valid certificate.
|
|
return c.Leaf != nil && c.Leaf.NotAfter.Before(time.Now().Add(-time.Minute))
|
|
}
|
|
|
|
func issueCertificate(rawCA *Certificate, domain string) (*xtls.Certificate, error) {
|
|
parent, err := cert.ParseCertificate(rawCA.Certificate, rawCA.Key)
|
|
if err != nil {
|
|
return nil, newError("failed to parse raw certificate").Base(err)
|
|
}
|
|
newCert, err := cert.Generate(parent, cert.CommonName(domain), cert.DNSNames(domain))
|
|
if err != nil {
|
|
return nil, newError("failed to generate new certificate for ", domain).Base(err)
|
|
}
|
|
newCertPEM, newKeyPEM := newCert.ToPEM()
|
|
cert, err := xtls.X509KeyPair(newCertPEM, newKeyPEM)
|
|
return &cert, err
|
|
}
|
|
|
|
func (c *Config) getCustomCA() []*Certificate {
|
|
certs := make([]*Certificate, 0, len(c.Certificate))
|
|
for _, certificate := range c.Certificate {
|
|
if certificate.Usage == Certificate_AUTHORITY_ISSUE {
|
|
certs = append(certs, certificate)
|
|
}
|
|
}
|
|
return certs
|
|
}
|
|
|
|
func getGetCertificateFunc(c *xtls.Config, ca []*Certificate) func(hello *xtls.ClientHelloInfo) (*xtls.Certificate, error) {
|
|
var access sync.RWMutex
|
|
|
|
return func(hello *xtls.ClientHelloInfo) (*xtls.Certificate, error) {
|
|
domain := hello.ServerName
|
|
certExpired := false
|
|
|
|
access.RLock()
|
|
certificate, found := c.NameToCertificate[domain]
|
|
access.RUnlock()
|
|
|
|
if found {
|
|
if !isCertificateExpired(certificate) {
|
|
return certificate, nil
|
|
}
|
|
certExpired = true
|
|
}
|
|
|
|
if certExpired {
|
|
newCerts := make([]xtls.Certificate, 0, len(c.Certificates))
|
|
|
|
access.Lock()
|
|
for _, certificate := range c.Certificates {
|
|
if !isCertificateExpired(&certificate) {
|
|
newCerts = append(newCerts, certificate)
|
|
}
|
|
}
|
|
|
|
c.Certificates = newCerts
|
|
access.Unlock()
|
|
}
|
|
|
|
var issuedCertificate *xtls.Certificate
|
|
|
|
// Create a new certificate from existing CA if possible
|
|
for _, rawCert := range ca {
|
|
if rawCert.Usage == Certificate_AUTHORITY_ISSUE {
|
|
newCert, err := issueCertificate(rawCert, domain)
|
|
if err != nil {
|
|
newError("failed to issue new certificate for ", domain).Base(err).WriteToLog()
|
|
continue
|
|
}
|
|
|
|
access.Lock()
|
|
c.Certificates = append(c.Certificates, *newCert)
|
|
issuedCertificate = &c.Certificates[len(c.Certificates)-1]
|
|
access.Unlock()
|
|
break
|
|
}
|
|
}
|
|
|
|
if issuedCertificate == nil {
|
|
return nil, newError("failed to create a new certificate for ", domain)
|
|
}
|
|
|
|
access.Lock()
|
|
c.BuildNameToCertificate()
|
|
access.Unlock()
|
|
|
|
return issuedCertificate, nil
|
|
}
|
|
}
|
|
|
|
func getNewGetCertficateFunc(certs []*xtls.Certificate) func(hello *xtls.ClientHelloInfo) (*xtls.Certificate, error) {
|
|
return func(hello *xtls.ClientHelloInfo) (*xtls.Certificate, error) {
|
|
if len(certs) == 0 {
|
|
return nil, newError("empty certs")
|
|
}
|
|
sni := strings.ToLower(hello.ServerName)
|
|
if len(certs) == 1 || sni == "" {
|
|
return certs[0], nil
|
|
}
|
|
gsni := "*"
|
|
if index := strings.IndexByte(sni, '.'); index != -1 {
|
|
gsni += sni[index:]
|
|
}
|
|
for _, keyPair := range certs {
|
|
if keyPair.Leaf.Subject.CommonName == sni || keyPair.Leaf.Subject.CommonName == gsni {
|
|
return keyPair, nil
|
|
}
|
|
for _, name := range keyPair.Leaf.DNSNames {
|
|
if name == sni || name == gsni {
|
|
return keyPair, nil
|
|
}
|
|
}
|
|
}
|
|
return certs[0], nil
|
|
}
|
|
}
|
|
|
|
func (c *Config) parseServerName() string {
|
|
return c.ServerName
|
|
}
|
|
|
|
// GetXTLSConfig converts this Config into xtls.Config.
|
|
func (c *Config) GetXTLSConfig(opts ...Option) *xtls.Config {
|
|
root, err := c.getCertPool()
|
|
if err != nil {
|
|
newError("failed to load system root certificate").AtError().Base(err).WriteToLog()
|
|
}
|
|
|
|
if c == nil {
|
|
return &xtls.Config{
|
|
ClientSessionCache: globalSessionCache,
|
|
RootCAs: root,
|
|
InsecureSkipVerify: false,
|
|
NextProtos: nil,
|
|
SessionTicketsDisabled: true,
|
|
}
|
|
}
|
|
|
|
config := &xtls.Config{
|
|
ClientSessionCache: globalSessionCache,
|
|
RootCAs: root,
|
|
InsecureSkipVerify: c.AllowInsecure,
|
|
NextProtos: c.NextProtocol,
|
|
SessionTicketsDisabled: !c.EnableSessionResumption,
|
|
}
|
|
|
|
for _, opt := range opts {
|
|
opt(config)
|
|
}
|
|
|
|
caCerts := c.getCustomCA()
|
|
if len(caCerts) > 0 {
|
|
config.GetCertificate = getGetCertificateFunc(config, caCerts)
|
|
} else {
|
|
config.GetCertificate = getNewGetCertficateFunc(c.BuildCertificates())
|
|
}
|
|
|
|
if sn := c.parseServerName(); len(sn) > 0 {
|
|
config.ServerName = sn
|
|
}
|
|
|
|
if len(config.NextProtos) == 0 {
|
|
config.NextProtos = []string{"h2", "http/1.1"}
|
|
}
|
|
|
|
switch c.MinVersion {
|
|
case "1.0":
|
|
config.MinVersion = xtls.VersionTLS10
|
|
case "1.1":
|
|
config.MinVersion = xtls.VersionTLS11
|
|
case "1.2":
|
|
config.MinVersion = xtls.VersionTLS12
|
|
case "1.3":
|
|
config.MinVersion = xtls.VersionTLS13
|
|
}
|
|
|
|
switch c.MaxVersion {
|
|
case "1.0":
|
|
config.MaxVersion = xtls.VersionTLS10
|
|
case "1.1":
|
|
config.MaxVersion = xtls.VersionTLS11
|
|
case "1.2":
|
|
config.MaxVersion = xtls.VersionTLS12
|
|
case "1.3":
|
|
config.MaxVersion = xtls.VersionTLS13
|
|
}
|
|
|
|
if len(c.CipherSuites) > 0 {
|
|
id := make(map[string]uint16)
|
|
for _, s := range xtls.CipherSuites() {
|
|
id[s.Name] = s.ID
|
|
}
|
|
for _, n := range strings.Split(c.CipherSuites, ":") {
|
|
if id[n] != 0 {
|
|
config.CipherSuites = append(config.CipherSuites, id[n])
|
|
}
|
|
}
|
|
}
|
|
|
|
config.PreferServerCipherSuites = c.PreferServerCipherSuites
|
|
|
|
return config
|
|
}
|
|
|
|
// Option for building XTLS config.
|
|
type Option func(*xtls.Config)
|
|
|
|
// WithDestination sets the server name in XTLS config.
|
|
func WithDestination(dest net.Destination) Option {
|
|
return func(config *xtls.Config) {
|
|
if dest.Address.Family().IsDomain() && config.ServerName == "" {
|
|
config.ServerName = dest.Address.Domain()
|
|
}
|
|
}
|
|
}
|
|
|
|
// WithNextProto sets the ALPN values in XTLS config.
|
|
func WithNextProto(protocol ...string) Option {
|
|
return func(config *xtls.Config) {
|
|
if len(config.NextProtos) == 0 {
|
|
config.NextProtos = protocol
|
|
}
|
|
}
|
|
}
|
|
|
|
// ConfigFromStreamSettings fetches Config from stream settings. Nil if not found.
|
|
func ConfigFromStreamSettings(settings *internet.MemoryStreamConfig) *Config {
|
|
if settings == nil {
|
|
return nil
|
|
}
|
|
config, ok := settings.SecuritySettings.(*Config)
|
|
if !ok {
|
|
return nil
|
|
}
|
|
return config
|
|
}
|