Method finalizeEncrypted

lib/model/sharedpullerstate.go:374–382

finalizeEncrypted adds a trailer to the encrypted file containing the serialized FileInfo and the length of that FileInfo. When initializing a folder from encrypted data we can extract this FileInfo from the end of the file and regain the original metadata.

()

// folder from encrypted data we can extract this FileInfo from the end of
// the file and regain the original metadata.
func (s *sharedPullerState) finalizeEncrypted() error {
	trailerSize, err := writeEncryptionTrailer(s.file, s.writer)
	if err != nil {
		return err
	}
	s.file.Size += trailerSize
	s.file.EncryptionTrailerSize = int(trailerSize)
	return nil
}

// Returns the size of the written trailer.
func writeEncryptionTrailer(file protocol.FileInfo, writer io.WriterAt) (int64, error) {