package crypto
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import (
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"crypto/cipher"
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"io"
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"github.com/v2fly/v2ray-core/v5/common/buf"
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)
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type CryptionReader struct {
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stream cipher.Stream
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reader io.Reader
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}
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func NewCryptionReader(stream cipher.Stream, reader io.Reader) *CryptionReader {
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return &CryptionReader{
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stream: stream,
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reader: reader,
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}
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}
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func (r *CryptionReader) Read(data []byte) (int, error) {
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nBytes, err := r.reader.Read(data)
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if nBytes > 0 {
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r.stream.XORKeyStream(data[:nBytes], data[:nBytes])
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}
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return nBytes, err
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}
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var _ buf.Writer = (*CryptionWriter)(nil)
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type CryptionWriter struct {
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stream cipher.Stream
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writer io.Writer
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bufWriter buf.Writer
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}
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// NewCryptionWriter creates a new CryptionWriter.
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func NewCryptionWriter(stream cipher.Stream, writer io.Writer) *CryptionWriter {
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return &CryptionWriter{
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stream: stream,
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writer: writer,
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bufWriter: buf.NewWriter(writer),
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}
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}
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// Write implements io.Writer.Write().
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func (w *CryptionWriter) Write(data []byte) (int, error) {
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w.stream.XORKeyStream(data, data)
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if err := buf.WriteAllBytes(w.writer, data); err != nil {
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return 0, err
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}
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return len(data), nil
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}
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// WriteMultiBuffer implements buf.Writer.
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func (w *CryptionWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
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for _, b := range mb {
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w.stream.XORKeyStream(b.Bytes(), b.Bytes())
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}
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return w.bufWriter.WriteMultiBuffer(mb)
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}
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