linting the code

wrappers/stream/blockcipher.go

@@ -27,6 +27,7 @@ func (w *wrapperBlockCipher) Write(p []byte) (int, error) {
 	if err != nil {
 		return 0, err
 	}
+
 	return w.parent.Write(encrypted)
 }
 
@@ -35,6 +36,7 @@ func (w *wrapperBlockCipher) WriteTimeout(p []byte, timeout time.Duration) (int,
 	if err != nil {
 		return 0, err
 	}
+
 	return w.parent.WriteTimeout(encrypted, timeout)
 }
 
@@ -49,6 +51,7 @@ func (w *wrapperBlockCipher) Read(p []byte) (int, error) {
 		if err != nil {
 			return 0, fmt.Errorf("cannot read data: %w", err)
 		}
+
 		currentBuffer = append(currentBuffer, rv...)
 	}
 

wrappers/stream/conn.go

@@ -38,6 +38,7 @@ func (w *wrapperConn) WriteTimeout(p []byte, timeout time.Duration) (int, error)
 func (w *wrapperConn) Write(p []byte) (int, error) {
 	n, err := w.parent.Write(p)
 	w.logger.Debugw("write to stream", "bytes", n, "error", err)
+
 	if err != nil {
 		w.Close() // nolint: gosec
 	}
@@ -57,6 +58,7 @@ func (w *wrapperConn) ReadTimeout(p []byte, timeout time.Duration) (int, error)
 func (w *wrapperConn) Read(p []byte) (int, error) {
 	n, err := w.parent.Read(p)
 	w.logger.Debugw("Read from stream", "bytes", n, "error", err)
+
 	if err != nil {
 		w.Close()
 	}

wrappers/stream/mtproto_cipher.go

@@ -4,8 +4,8 @@ import (
 	"bytes"
 	"crypto/aes"
 	"crypto/cipher"
-	"crypto/md5"
-	"crypto/sha1"
+	"crypto/md5"  // nolint: gosec
+	"crypto/sha1" // nolint: gosec
 	"encoding/binary"
 	"net"
 
@@ -61,13 +61,16 @@ func mtprotoDeriveKeys(purpose mtprotoCipherPurpose,
 
 	clientIPv4 := mtprotoEmptyIP[:]
 	serverIPv4 := mtprotoEmptyIP[:]
+
 	if client.IP.To4() != nil {
 		clientIPv4 = utils.ReverseBytes(client.IP.To4())
 		serverIPv4 = utils.ReverseBytes(remote.IP.To4())
 	}
+
 	message.Write(serverIPv4) // nolint: gosec
 
 	var port [2]byte
+
 	binary.LittleEndian.PutUint16(port[:], uint16(client.Port))
 	message.Write(port[:]) // nolint: gosec
 
@@ -90,6 +93,7 @@ func mtprotoDeriveKeys(purpose mtprotoCipherPurpose,
 		message.Write(client.IP.To16()) // nolint: gosec
 		message.Write(remote.IP.To16()) // nolint: gosec
 	}
+
 	message.Write(req.Nonce) // nolint: gosec
 
 	data := message.Bytes()

wrappers/stream/obfuscated2.go

@@ -22,6 +22,7 @@ func (w *wrapperObfuscated2) ReadTimeout(p []byte, timeout time.Duration) (int,
 	if err != nil {
 		return 0, fmt.Errorf("cannot read stream ciphered data: %w", err)
 	}
+
 	w.decryptor.XORKeyStream(p, p[:n])
 
 	return n, nil
@@ -32,6 +33,7 @@ func (w *wrapperObfuscated2) Read(p []byte) (int, error) {
 	if err != nil {
 		return n, err
 	}
+
 	w.decryptor.XORKeyStream(p, p[:n])
 
 	return n, nil

wrappers/stream/stats_telegram.go

@@ -65,6 +65,7 @@ func NewTelegramStats(dc conntypes.DC, parent conntypes.StreamReadWriteCloser) c
 		parent: parent,
 		dc:     dc,
 	}
+
 	stats.Stats.TelegramConnected(dc, parent.RemoteAddr())
 
 	return conn