frp/utils/net/tls.go

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2019-03-11 14:14:31 +08:00
// Copyright 2019 fatedier, fatedier@gmail.com
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package net
import (
"crypto/tls"
"net"
gnet "github.com/fatedier/golib/net"
)
var (
FRP_TLS_HEAD_BYTE = 0x17
)
func WrapTLSClientConn(c net.Conn, tlsConfig *tls.Config) (out Conn) {
c.Write([]byte{byte(FRP_TLS_HEAD_BYTE)})
out = WrapConn(tls.Client(c, tlsConfig))
return
}
func CheckAndEnableTLSServerConn(c net.Conn, tlsConfig *tls.Config) (out Conn) {
sc, r := gnet.NewSharedConnSize(c, 1)
buf := make([]byte, 1)
n, _ := r.Read(buf)
if n == 1 && int(buf[0]) == FRP_TLS_HEAD_BYTE {
out = WrapConn(tls.Server(c, tlsConfig))
} else {
out = WrapConn(sc)
}
return
}