1. VerifyHMAC-then-Decrypt the ciphertext to get the hash
2. Verify that the password matches the hash
/**
* @expectedException \Defuse\Crypto\Exception\WrongKeyOrModifiedCiphertextException
*/
public function testBitflip()
{
$key = Key::createNewRandomKey();
$password = PasswordLock::hashAndEncrypt('YELLOW SUBMARINE', $key);
$password[0] = \ord($password[0]) === 0 ? 255 : 0;
PasswordLock::decryptAndVerify('YELLOW SUBMARINE', $password, $key);
}
/**
* @expectedException \Defuse\Crypto\Exception\InvalidCiphertext
*/
public function testBitflip()
{
$key = \Defuse\Crypto\Key::LoadFromAsciiSafeString(\hex2bin('0102030405060708090a0b0c0d0e0f10'));
$password = PasswordLock::hashAndEncrypt('YELLOW SUBMARINE', $key);
$password[0] = \ord($password[0]) === 0 ? 255 : 0;
PasswordLock::decryptAndVerify('YELLOW SUBMARINE', $password, $key);
}
/**
* @expectedException \Defuse\Crypto\Exception\InvalidCiphertext
*/
public function testBitflip()
{
$key = \hex2bin('0102030405060708090a0b0c0d0e0f10');
$password = PasswordLock::hashAndEncrypt('YELLOW SUBMARINE', $key);
$password[0] = \ord($password[0]) === 0 ? 255 : 0;
PasswordLock::decryptAndVerify('YELLOW SUBMARINE', $password, $key);
}
/**
* {@inheritdoc}
*/
public function verify(string $password, string $hashedValue) : bool
{
return PasswordLock::decryptAndVerify($password, $hashedValue, $this->key);
}
