Pbkdf2 class abstract

PBKDF2 password hashing algorithm implemented in pure Dart.

About the algorithm

• macAlgorithm can be any MacAlgorithm (such as Hmac.sha256()).
• iterations should be at least 100 000 for reasonable security in password hashing. The higher the better.
• bits should be at least 128 for reasonable security in password hashing.
• PBKDF2 is a popular choice for password hashing, but much better algorithms exists (such as Argon2id).

Example

import 'package:better_cryptography/better_cryptography.dart';

Future<void> main() async {
  final pbkdf2 = Pbkdf2(
    macAlgorithm: Hmac.sha256(),
    iterations: 100000,
    bits: 128,
  );

  // Password we want to hash
  final secretKey = SecretKey([1,2,3]);

  // A random salt
  final nonce = [4,5,6];

  // Calculate a hash that can be stored in the database
  final newSecretKey = await pbkdf2.deriveKey(
    secretKey: secretKey,
    nonce: nonce,
  );
  final newSecretKeyBytes = await newSecretKey.extractBytes();
  print('Result: $newSecretKeyBytes');
}

Inheritance

• Object
• KdfAlgorithm
• Pbkdf2

Implementers

• DartPbkdf2

Constructors

Pbkdf2.new({required MacAlgorithm macAlgorithm, required int iterations, required int bits})

factory

Pbkdf2.constructor()

Constructor for classes that extend this class.

const

Properties

bits → int

no setter

hashCode → int

The hash code for this object.

no setter, override

iterations → int

no setter

macAlgorithm → MacAlgorithm

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

deriveKey({required SecretKey secretKey, required List<int> nonce}) → Future<SecretKey>

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

override

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