HkdfSecretKey class abstract
HKDF secret key (or password) for key derivation.
An HkdfSecretKey instance holds a secret key for key derivation using the HMAC-based Key Derivation Function specified in RFC 5869 using a Hash function specified in the deriveBits method.
A HkdfSecretKey can be imported using importRawKey.
Example
import 'dart:convert' show utf8, base64;
import 'package:webcrypto/webcrypto.dart';
// Provide a password to be used for key derivation
final key = await HkdfSecretKey.importRawKey(utf8.decode(
'my-password-in-plain-text',
));
// Derive a key from password
final derivedKey = await HkdfSecretKey.deriveBits(
256, // number of bits to derive.
Hash.sha256,
utf8.decode('unique salt'),
utf8.decode('creating derivedKey in example'),
);
// Print the derived key, this could also be used as basis for other new
// symmetric cryptographic keys.
print(base64.encode(derivedKey));
- Annotations
-
- @sealed
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
deriveBits(
int length, Hash hash, List< int> salt, List<int> info) → Future<Uint8List> -
Derive key from
salt
,info
and password specified askeyData
in importRawKey. -
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
Static Methods
-
importRawKey(
List< int> keyData) → Future<HkdfSecretKey> -
Import
HkdfSecretKey
from rawkeyData
.