SignatureAlgorithm<T extends PublicKey> class abstract

An digital signature algorithm that supports newKeyPair(), sign(), verify().

Available algorithms

Example

In this example, we use Ed25519:

import 'package:cryptography/cryptography.dart';

Future<void> main() async {
  final signedMessage = 'Hello, world!';

  final ed25519 = Ed25519();
  final keyPair = await ed25519.newKeyPair();
  final signature = await ed25519.signString(
    signedMessage,
    keyPair: keyPair,
  );

  // ...

  final isRealSignature = await ed25519.verifyString(
    signedMessage,
    signature: signature,
  );

  print('Signature verification result: $isRealSignature');
}
Implementers

Constructors

SignatureAlgorithm()
const

Properties

hashCode → int
The hash code for this object.
no setterinherited
keyPairType → KeyPairType<KeyPairData, PublicKey>
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

newKeyPair() → Future<KeyPair>
Generates a new KeyPair for this algorithm.
newKeyPairFromSeed(List<int> seed) → Future<KeyPair>
Generates a new KeyPair that uses the seed bytes.
newSignatureWand() → Future<SignatureWand>
Generates a new SignatureWand that has a random KeyPair.
newSignatureWandFromKeyPair(KeyPair keyPair) → Future<SignatureWand>
Generates a new SignatureWand that uses the given KeyPair.
newSignatureWandFromSeed(List<int> seed) → Future<SignatureWand>
Generates a new SignatureWand that uses the given seed bytes.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
sign(List<int> message, {required KeyPair keyPair}) → Future<Signature>
Signs bytes.
signString(String message, {required KeyPair keyPair}) → Future<Signature>
Signs a string.
toString() → String
A string representation of this object.
inherited
verify(List<int> message, {required Signature signature}) → Future<bool>
Verifies whether bytes was signed with signature.
verifyString(String message, {required Signature signature}) → Future<bool>
Verifies whether a string was signed with signature.

Operators

operator ==(Object other) → bool
The equality operator.
inherited