Dart

BCrypt Verify a Password (Check if Password is Correct)

See more Encryption Examples

A system that uses BCrypt for storing passwords would not store the actual password, but would instead store the bcrypt hash of the password. When a user presents the password, such as for login, call BCryptVerify to verify the password against the stored bcrypt hash.

Note: This example requires Chilkat v9.5.0.65 or greater.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final crypt = CkCrypt2();

  final storedHash = '\$2a\$10\$H5kIVktMGzAPKGKNAe9DVu0iwEqfhv/o4MMJ/Dzw/MPy1leOE9NOK';
  var password = 'mySecretPassword';

  try {
    crypt.bCryptVerify(password, storedHash);
    print('$password is valid.');
  } on ChilkatException {
    print('$password is NOT valid.');
  }

  password = 'notAValidPassword';
  try {
    crypt.bCryptVerify(password, storedHash);
    print('$password is valid.');
  } on ChilkatException {
    print('$password is NOT valid.');
  }

  // Output should be:

  // 	mySecretPassword is valid.
  // 	notAValidPassword is NOT valid.
}