mirror of
https://github.com/ZeroDream-CN/SakuraFrp
synced 2024-11-21 15:00:45 +00:00
vhost: use new readClientHello function - From Upstream #2504
This commit is contained in:
夜棂依
GitHub
parent
4d00e51df7
commit
6a0b1789da
@ -15,33 +15,14 @@
|
||||
package vhost
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"crypto/tls"
|
||||
"io"
|
||||
"strings"
|
||||
"net"
|
||||
"time"
|
||||
|
||||
frpNet "github.com/fatedier/frp/utils/net"
|
||||
|
||||
gnet "github.com/fatedier/golib/net"
|
||||
"github.com/fatedier/golib/pool"
|
||||
)
|
||||
|
||||
const (
|
||||
typeClientHello uint8 = 1 // Type client hello
|
||||
)
|
||||
|
||||
// TLS extension numbers
|
||||
const (
|
||||
extensionServerName uint16 = 0
|
||||
extensionStatusRequest uint16 = 5
|
||||
extensionSupportedCurves uint16 = 10
|
||||
extensionSupportedPoints uint16 = 11
|
||||
extensionSignatureAlgorithms uint16 = 13
|
||||
extensionALPN uint16 = 16
|
||||
extensionSCT uint16 = 18
|
||||
extensionSessionTicket uint16 = 35
|
||||
extensionNextProtoNeg uint16 = 13172 // not IANA assigned
|
||||
extensionRenegotiationInfo uint16 = 0xff01
|
||||
)
|
||||
|
||||
type HttpsMuxer struct {
|
||||
@ -53,143 +34,49 @@ func NewHttpsMuxer(listener frpNet.Listener, timeout time.Duration) (*HttpsMuxer
|
||||
return &HttpsMuxer{mux}, err
|
||||
}
|
||||
|
||||
func readHandshake(rd io.Reader) (host string, err error) {
|
||||
data := pool.GetBuf(1024)
|
||||
origin := data
|
||||
defer pool.PutBuf(origin)
|
||||
|
||||
_, err = io.ReadFull(rd, data[:47])
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
|
||||
length, err := rd.Read(data[47:])
|
||||
if err != nil {
|
||||
return
|
||||
} else {
|
||||
length += 47
|
||||
}
|
||||
data = data[:length]
|
||||
if uint8(data[5]) != typeClientHello {
|
||||
err = fmt.Errorf("readHandshake: type[%d] is not clientHello", uint16(data[5]))
|
||||
return
|
||||
}
|
||||
|
||||
// session
|
||||
sessionIdLen := int(data[43])
|
||||
if sessionIdLen > 32 || len(data) < 44+sessionIdLen {
|
||||
err = fmt.Errorf("readHandshake: sessionIdLen[%d] is long", sessionIdLen)
|
||||
return
|
||||
}
|
||||
data = data[44+sessionIdLen:]
|
||||
if len(data) < 2 {
|
||||
err = fmt.Errorf("readHandshake: dataLen[%d] after session is short", len(data))
|
||||
return
|
||||
}
|
||||
|
||||
// cipher suite numbers
|
||||
cipherSuiteLen := int(data[0])<<8 | int(data[1])
|
||||
if cipherSuiteLen%2 == 1 || len(data) < 2+cipherSuiteLen {
|
||||
err = fmt.Errorf("readHandshake: dataLen[%d] after cipher suite is short", len(data))
|
||||
return
|
||||
}
|
||||
data = data[2+cipherSuiteLen:]
|
||||
if len(data) < 1 {
|
||||
err = fmt.Errorf("readHandshake: cipherSuiteLen[%d] is long", cipherSuiteLen)
|
||||
return
|
||||
}
|
||||
|
||||
// compression method
|
||||
compressionMethodsLen := int(data[0])
|
||||
if len(data) < 1+compressionMethodsLen {
|
||||
err = fmt.Errorf("readHandshake: compressionMethodsLen[%d] is long", compressionMethodsLen)
|
||||
return
|
||||
}
|
||||
|
||||
data = data[1+compressionMethodsLen:]
|
||||
if len(data) == 0 {
|
||||
// ClientHello is optionally followed by extension data
|
||||
err = fmt.Errorf("readHandshake: there is no extension data to get servername")
|
||||
return
|
||||
}
|
||||
if len(data) < 2 {
|
||||
err = fmt.Errorf("readHandshake: extension dataLen[%d] is too short", len(data))
|
||||
return
|
||||
}
|
||||
|
||||
extensionsLength := int(data[0])<<8 | int(data[1])
|
||||
data = data[2:]
|
||||
if extensionsLength != len(data) {
|
||||
err = fmt.Errorf("readHandshake: extensionsLen[%d] is not equal to dataLen[%d]", extensionsLength, len(data))
|
||||
return
|
||||
}
|
||||
for len(data) != 0 {
|
||||
if len(data) < 4 {
|
||||
err = fmt.Errorf("readHandshake: extensionsDataLen[%d] is too short", len(data))
|
||||
return
|
||||
}
|
||||
extension := uint16(data[0])<<8 | uint16(data[1])
|
||||
length := int(data[2])<<8 | int(data[3])
|
||||
data = data[4:]
|
||||
if len(data) < length {
|
||||
err = fmt.Errorf("readHandshake: extensionLen[%d] is long", length)
|
||||
return
|
||||
}
|
||||
|
||||
switch extension {
|
||||
case extensionRenegotiationInfo:
|
||||
if length != 1 || data[0] != 0 {
|
||||
err = fmt.Errorf("readHandshake: extension reNegotiationInfoLen[%d] is short", length)
|
||||
return
|
||||
}
|
||||
case extensionNextProtoNeg:
|
||||
case extensionStatusRequest:
|
||||
case extensionServerName:
|
||||
d := data[:length]
|
||||
if len(d) < 2 {
|
||||
err = fmt.Errorf("readHandshake: remiaining dataLen[%d] is short", len(d))
|
||||
return
|
||||
}
|
||||
namesLen := int(d[0])<<8 | int(d[1])
|
||||
d = d[2:]
|
||||
if len(d) != namesLen {
|
||||
err = fmt.Errorf("readHandshake: nameListLen[%d] is not equal to dataLen[%d]", namesLen, len(d))
|
||||
return
|
||||
}
|
||||
for len(d) > 0 {
|
||||
if len(d) < 3 {
|
||||
err = fmt.Errorf("readHandshake: extension serverNameLen[%d] is short", len(d))
|
||||
return
|
||||
}
|
||||
nameType := d[0]
|
||||
nameLen := int(d[1])<<8 | int(d[2])
|
||||
d = d[3:]
|
||||
if len(d) < nameLen {
|
||||
err = fmt.Errorf("readHandshake: nameLen[%d] is not equal to dataLen[%d]", nameLen, len(d))
|
||||
return
|
||||
}
|
||||
if nameType == 0 {
|
||||
serverName := string(d[:nameLen])
|
||||
host = strings.TrimSpace(serverName)
|
||||
return host, nil
|
||||
}
|
||||
d = d[nameLen:]
|
||||
}
|
||||
}
|
||||
data = data[length:]
|
||||
}
|
||||
err = fmt.Errorf("Unknow error")
|
||||
return
|
||||
}
|
||||
|
||||
func GetHttpsHostname(c frpNet.Conn) (_ frpNet.Conn, _ map[string]string, err error) {
|
||||
reqInfoMap := make(map[string]string, 0)
|
||||
sc, rd := gnet.NewSharedConn(c)
|
||||
host, err := readHandshake(rd)
|
||||
|
||||
clientHello, err := readClientHello(rd)
|
||||
if err != nil {
|
||||
return nil, reqInfoMap, err
|
||||
}
|
||||
reqInfoMap["Host"] = host
|
||||
|
||||
reqInfoMap["Host"] = clientHello.ServerName
|
||||
reqInfoMap["Scheme"] = "https"
|
||||
return frpNet.WrapConn(sc), reqInfoMap, nil
|
||||
}
|
||||
|
||||
func readClientHello(reader io.Reader) (*tls.ClientHelloInfo, error) {
|
||||
var hello *tls.ClientHelloInfo
|
||||
|
||||
// Note that Handshake always fails because the readOnlyConn is not a real connection.
|
||||
// As long as the Client Hello is successfully read, the failure should only happen after GetConfigForClient is called,
|
||||
// so we only care about the error if hello was never set.
|
||||
err := tls.Server(readOnlyConn{reader: reader}, &tls.Config{
|
||||
GetConfigForClient: func(argHello *tls.ClientHelloInfo) (*tls.Config, error) {
|
||||
hello = &tls.ClientHelloInfo{}
|
||||
*hello = *argHello
|
||||
return nil, nil
|
||||
},
|
||||
}).Handshake()
|
||||
|
||||
if hello == nil {
|
||||
return nil, err
|
||||
}
|
||||
return hello, nil
|
||||
}
|
||||
|
||||
type readOnlyConn struct {
|
||||
reader io.Reader
|
||||
}
|
||||
|
||||
func (conn readOnlyConn) Read(p []byte) (int, error) { return conn.reader.Read(p) }
|
||||
func (conn readOnlyConn) Write(p []byte) (int, error) { return 0, io.ErrClosedPipe }
|
||||
func (conn readOnlyConn) Close() error { return nil }
|
||||
func (conn readOnlyConn) LocalAddr() net.Addr { return nil }
|
||||
func (conn readOnlyConn) RemoteAddr() net.Addr { return nil }
|
||||
func (conn readOnlyConn) SetDeadline(t time.Time) error { return nil }
|
||||
func (conn readOnlyConn) SetReadDeadline(t time.Time) error { return nil }
|
||||
func (conn readOnlyConn) SetWriteDeadline(t time.Time) error { return nil }
|
||||
|
||||
Loading…
Reference in New Issue
Block a user