stegify-flutter-plugin

Flutter plugin for fully transparent hiding any file within an image using stegify API. This technique is known as LSB (Least Significant Bit) steganography

Demonstration

CarrierDataResult
Original FileEncoded FileEncoded File

The Result file contains the Data file hidden in it. And as you can see it is fully transparent.

Usage

flutter-stegify plugin offers an easy to use Dart functions for steganography encodin/decoding. The original implementation is in Go and can be found here: stegify

This plugin uses go-mobile for generating platform native bindings and exposes Dart functions which can be used directly in your flutter mobile application!

API

void encode(String carrierFileName, String dataFileName, String resultFileName) async
void decode(String carrierFileName, String resultFileName) async

encode performs steganography encoding of data file in carrier file and saves the steganography encoded product in new file.

decode performs steganography decoding of data previously encoded by the Encode function. The data is decoded from file carrier and it is saved in separate new file

NOTE: The result file won't have any file extension and therefore it should be specified explicitly in the resultFileName argument.

Disclaimer

If carrier file is in jpeg or jpg format, after encoding the result file image will be png encoded (therefore it may be bigger in size) despite of file extension inherited from the original carrier file (which is .jpeg or .jpg).

Libraries

flutter_stegify

Dart

VM

dart:ffi
Foreign Function Interface for interoperability with the C programming language. [...]

Web

dart:html
HTML elements and other resources for web-based applications that need to interact with the browser and the DOM (Document Object Model). [...]
dart:js
Low-level support for interoperating with JavaScript. [...]
dart:js_util
Utility methods to efficiently manipulate typed JSInterop objects in cases where the name to call is not known at runtime. You should only use these methods when the same effect cannot be achieved with @JS annotations. These methods would be extension methods on JSObject if Dart supported extension methods.