SteganographyController class

Main API: encrypts UTF-8 text into an image and extracts it back.

Create once with a 32-byte key, method, and optional cipher, then call encrypt / decrypt. Call dispose when the key is no longer needed.

final key = Uint8List.fromList(List.filled(32, 0x42));
final controller = SteganographyController(
  key: key,
  method: SteganographyMethod.lsb,
);
final stego = await controller.encrypt(
  imageBytes: pngBytes,
  text: 'secret',
);
final text = await controller.decrypt(imageBytes: stego);
controller.dispose();

Constructors

SteganographyController({required Uint8List key, required SteganographyMethod method, SteganographyCipher cipher = SteganographyCipher.aes256Gcm})

Creates a controller.

Properties

cipher → SteganographyCipher

Cipher used to protect the payload before embedding.

final

hashCode → int

The hash code for this object.

no setter, inherited

method → SteganographyMethod

Steganography algorithm used for embed and extract.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

decrypt({required Uint8List imageBytes}) → Future<String>

Extracts and decrypts hidden data from imageBytes as UTF-8 text.

dispose() → void

Zeroes the key in memory. Further calls throw StateError.

encrypt({required Uint8List imageBytes, required String text}) → Future<Uint8List>

Encrypts text and embeds it into imageBytes.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited