verify method

  1. @override
Future<bool> verify(
  1. List<int> message, {
  2. required Signature signature,
})

Verifies whether bytes was signed with signature.

Example

In this example, we use Ed25519:

import 'package:cryptography/cryptography.dart';

Future<void> main() async {
  final signedMessage = [1,2,3];

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

  // ...

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

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

Implementation

@override
Future<bool> verify(List<int> message, {required Signature signature}) async {
  if (isSupportedPlatform) {
    final rsaPublicKey = signature.publicKey as RsaPublicKey;
    final result = await invokeMethod(
      'RsaSsaPkcs1v15.verify',
      {
        'data': Uint8List.fromList(message),
        'hash': hashAlgorithmName,
        'e': Uint8List.fromList(rsaPublicKey.e),
        'n': Uint8List.fromList(rsaPublicKey.n),
      },
    );
    return result['ok'] as bool;
  }
  return await fallback.verify(message, signature: signature);
}