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74 lines
1.7 KiB
74 lines
1.7 KiB
// Copyright 2017 fatedier, fatedier@gmail.com
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tcp
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import (
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"io"
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"github.com/golang/snappy"
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"github.com/fatedier/frp/utils/crypto"
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)
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func WithEncryption(rwc io.ReadWriteCloser, key []byte) (io.ReadWriteCloser, error) {
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w, err := crypto.NewWriter(rwc, key)
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if err != nil {
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return nil, err
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}
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return WrapReadWriteCloser(crypto.NewReader(rwc, key), w), nil
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}
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func WithCompression(rwc io.ReadWriteCloser) io.ReadWriteCloser {
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return WrapReadWriteCloser(snappy.NewReader(rwc), snappy.NewWriter(rwc))
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}
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func WrapReadWriteCloser(r io.Reader, w io.Writer) io.ReadWriteCloser {
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return &ReadWriteCloser{
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r: r,
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w: w,
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}
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}
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type ReadWriteCloser struct {
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r io.Reader
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w io.Writer
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}
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func (rwc *ReadWriteCloser) Read(p []byte) (n int, err error) {
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return rwc.r.Read(p)
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}
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func (rwc *ReadWriteCloser) Write(p []byte) (n int, err error) {
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return rwc.w.Write(p)
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}
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func (rwc *ReadWriteCloser) Close() (errRet error) {
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var err error
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if rc, ok := rwc.r.(io.Closer); ok {
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err = rc.Close()
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if err != nil {
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errRet = err
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}
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}
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if wc, ok := rwc.w.(io.Closer); ok {
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err = wc.Close()
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if err != nil {
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errRet = err
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}
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}
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return
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}
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