v2ray-core/common/crypto/io.go

57 lines
1.1 KiB
Go

package crypto
import (
"crypto/cipher"
"io"
"v2ray.com/core/common/buf"
)
type CryptionReader struct {
stream cipher.Stream
reader io.Reader
}
func NewCryptionReader(stream cipher.Stream, reader io.Reader) *CryptionReader {
return &CryptionReader{
stream: stream,
reader: reader,
}
}
func (r *CryptionReader) Read(data []byte) (int, error) {
nBytes, err := r.reader.Read(data)
if nBytes > 0 {
r.stream.XORKeyStream(data[:nBytes], data[:nBytes])
}
return nBytes, err
}
type CryptionWriter struct {
stream cipher.Stream
writer io.Writer
}
// NewCryptionWriter creates a new CryptionWriter.
func NewCryptionWriter(stream cipher.Stream, writer io.Writer) *CryptionWriter {
return &CryptionWriter{
stream: stream,
writer: writer,
}
}
// Write implements io.Writer.Write().
func (w *CryptionWriter) Write(data []byte) (int, error) {
w.stream.XORKeyStream(data, data)
return w.writer.Write(data)
}
func (w *CryptionWriter) WriteMultiBuffer(mb buf.MultiBuffer) (int, error) {
bs := mb.ToNetBuffers()
for _, b := range bs {
w.stream.XORKeyStream(b, b)
}
nBytes, err := bs.WriteTo(w.writer)
return int(nBytes), err
}