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127 lines
3.2 KiB
127 lines
3.2 KiB
package tls
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import (
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"crypto/tls"
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utls "github.com/refraction-networking/utls"
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"github.com/xtls/xray-core/common/buf"
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"github.com/xtls/xray-core/common/net"
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)
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//go:generate go run github.com/xtls/xray-core/common/errors/errorgen
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var _ buf.Writer = (*Conn)(nil)
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type Conn struct {
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*tls.Conn
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}
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func (c *Conn) WriteMultiBuffer(mb buf.MultiBuffer) error {
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mb = buf.Compact(mb)
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mb, err := buf.WriteMultiBuffer(c, mb)
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buf.ReleaseMulti(mb)
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return err
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}
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func (c *Conn) HandshakeAddress() net.Address {
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if err := c.Handshake(); err != nil {
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return nil
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}
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state := c.ConnectionState()
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if state.ServerName == "" {
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return nil
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}
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return net.ParseAddress(state.ServerName)
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}
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func (c *Conn) NegotiatedProtocol() (name string, mutual bool) {
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state := c.ConnectionState()
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return state.NegotiatedProtocol, state.NegotiatedProtocolIsMutual
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}
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// Client initiates a TLS client handshake on the given connection.
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func Client(c net.Conn, config *tls.Config) net.Conn {
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tlsConn := tls.Client(c, config)
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return &Conn{Conn: tlsConn}
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}
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// Server initiates a TLS server handshake on the given connection.
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func Server(c net.Conn, config *tls.Config) net.Conn {
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tlsConn := tls.Server(c, config)
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return &Conn{Conn: tlsConn}
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}
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type UConn struct {
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*utls.UConn
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}
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func (c *UConn) HandshakeAddress() net.Address {
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if err := c.Handshake(); err != nil {
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return nil
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}
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state := c.ConnectionState()
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if state.ServerName == "" {
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return nil
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}
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return net.ParseAddress(state.ServerName)
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}
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// WebsocketHandshake basically calls UConn.Handshake inside it but it will only send
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// http/1.1 in its ALPN.
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func (c *UConn) WebsocketHandshake() error {
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// Build the handshake state. This will apply every variable of the TLS of the
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// fingerprint in the UConn
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if err := c.BuildHandshakeState(); err != nil {
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return err
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}
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// Iterate over extensions and check for utls.ALPNExtension
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hasALPNExtension := false
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for _, extension := range c.Extensions {
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if alpn, ok := extension.(*utls.ALPNExtension); ok {
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hasALPNExtension = true
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alpn.AlpnProtocols = []string{"http/1.1"}
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break
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}
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}
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if !hasALPNExtension { // Append extension if doesn't exists
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c.Extensions = append(c.Extensions, &utls.ALPNExtension{AlpnProtocols: []string{"http/1.1"}})
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}
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// Rebuild the client hello and do the handshake
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if err := c.BuildHandshakeState(); err != nil {
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return err
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}
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return c.Handshake()
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}
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func (c *UConn) NegotiatedProtocol() (name string, mutual bool) {
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state := c.ConnectionState()
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return state.NegotiatedProtocol, state.NegotiatedProtocolIsMutual
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}
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func UClient(c net.Conn, config *tls.Config, fingerprint *utls.ClientHelloID) net.Conn {
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utlsConn := utls.UClient(c, copyConfig(config), *fingerprint)
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return &UConn{UConn: utlsConn}
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}
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func copyConfig(c *tls.Config) *utls.Config {
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return &utls.Config{
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RootCAs: c.RootCAs,
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ServerName: c.ServerName,
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InsecureSkipVerify: c.InsecureSkipVerify,
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}
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}
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var Fingerprints = map[string]*utls.ClientHelloID{
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"chrome": &utls.HelloChrome_Auto,
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"firefox": &utls.HelloFirefox_Auto,
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"safari": &utls.HelloIOS_Auto,
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"randomized": &utls.HelloRandomized,
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}
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type Interface interface {
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net.Conn
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Handshake() error
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VerifyHostname(host string) error
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NegotiatedProtocol() (name string, mutual bool)
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}
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