chore: remove redundant copy and slicing

Author: mrf345

safelock/core.go

@@ -88,7 +88,7 @@ func getGCM(pwd string, nonce []byte, config EncryptionConfig) (gcm cipher.AEAD,
 func (ag *asyncGcm) encryptChunk(chunk []byte) []byte {
 	item := <-ag.items
 	return append(
-		(*item.gcm).Seal(nil, *item.nonce, chunk[:], nil),
+		(*item.gcm).Seal(nil, *item.nonce, chunk, nil),
 		*item.nonce...,
 	)
 }

safelock/encrypt_test.go

@@ -51,7 +51,7 @@ func TestEncryptFile(t *testing.T) {
 
 	assert.Nil(inErr)
 	assert.Nil(outErr)
-	assert.Equal(content, string(decrypted[:]))
+	assert.Equal(content, string(decrypted))
 }
 
 func TestEncryptFileWithSha256AndGzip(t *testing.T) {
@@ -79,7 +79,7 @@ func TestEncryptFileWithSha256AndGzip(t *testing.T) {
 
 	assert.Nil(inErr)
 	assert.Nil(outErr)
-	assert.Equal(content, string(decrypted[:]))
+	assert.Equal(content, string(decrypted))
 }
 
 func TestEncryptFileWithTimeout(t *testing.T) {

safelock/reader.go

@@ -65,7 +65,7 @@ func (sr *safelockReader) ReadHeader() (err error) {
 		return sr.handleErr(err)
 	}
 
-	header := string(bytes.Trim(headerBytes, "\x00")[:])
+	header := string(bytes.Trim(headerBytes, "\x00"))
 	sr.blocks = strings.Split(header, ";")[1:]
 
 	if len(sr.blocks) == 0 {
@@ -123,7 +123,7 @@ func (sr *safelockReader) Read(chunk []byte) (read int, err error) {
 
 func (sr *safelockReader) handleOverflowIn(chunk *[]byte) (over int, done bool) {
 	if len(sr.overflow) > 0 {
-		over = copy(*chunk, sr.overflow[:])
+		over = copy(*chunk, sr.overflow)
 		sr.overflow = sr.overflow[over:]
 		left := len(*chunk) - over
 
@@ -146,7 +146,6 @@ func (sr *safelockReader) handleOverflowOut(chunk *[]byte, decrypted []byte) (co
 
 	copied = copy(*chunk, chunked)
 	sr.overflow = chunked[copied:]
-	copy(*chunk, chunked[:])
 
 	return
 }