Hkdf class abstract

HKDF (RFC 5869) key derivation algorithm.

DartHkdf is the pure Dart implementation of the HKDF algorithm. It's used when no faster implementation is available.

In browsers, "package:cryptography" will automatically attempt to use Web Crypto API, which has very good HKDF performance.

Flutter developers should add cryptography_flutter, as a dependency for the best possible HKDF performance.

Example

import 'package:cryptography/cryptography.dart';

void main() async {
  final algorithm = Hkdf(
    hmac: Hmac.sha256(),
    outputLength: 32,
  );
  final secretKey = SecretKey([1,2,3]);
  final nonce = [4,5,6];
  final output = await algorithm.deriveKey(
    secretKey: secretKey,
    nonce: nonce,
  );
}

Inheritance

• Object
• KdfAlgorithm
• Hkdf

Implementers

• DartHkdf

Constructors

Hkdf({required Hmac hmac, required int outputLength})

factory

Hkdf.constructor()

Constructor for classes that extend this class.

const

Properties

hashCode → int

The hash code for this object.

no setter, override

hmac → Hmac

no setter

outputLength → int

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

deriveKey({required SecretKey secretKey, List<int> nonce = const <int>[], List<int> info = const <int>[]}) → Future<SecretKeyData>

Generates a new secret key from a secret key and a nonce.

override

deriveKeyFromPassword({required String password, required List<int> nonce}) → Future<SecretKey>

Generates a new secret key from a password and a nonce.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override