/**
* Finish the hashing of a partially hashed layered hash
*
* Given a password hash that is hashed using the first layer of this object's
* configuration, perform the remaining layers of password hashing in order to
* get an updated hash with all the layers.
*
* @param ParameterizedPassword $passObj Password hash of the first layer
*
* @throws MWException If the first parameter is not of the correct type
*/
public function partialCrypt(ParameterizedPassword $passObj)
{
$type = $passObj->config['type'];
if ($type !== $this->config['types'][0]) {
throw new MWException('Only a hash in the first layer can be finished.');
}
// Gather info from the existing hash
$this->params[0] = implode($passObj->getDelimiter(), $passObj->params);
$this->args[0] = implode($passObj->getDelimiter(), $passObj->args);
$lastHash = $passObj->hash;
// Layer the remaining types
foreach ($this->config['types'] as $i => $type) {
if ($i == 0) {
continue;
}
// Construct pseudo-hash based on params and arguments
/** @var ParameterizedPassword $passObj */
$passObj = $this->factory->newFromType($type);
$params = '';
$args = '';
if ($this->params[$i] !== '') {
$params = $this->params[$i] . $passObj->getDelimiter();
}
if (isset($this->args[$i]) && $this->args[$i] !== '') {
$args = $this->args[$i] . $passObj->getDelimiter();
}
$existingHash = ":{$type}:" . $params . $args . $this->hash;
// Hash the last hash with the next type in the layer
$passObj = $this->factory->newFromCiphertext($existingHash);
$passObj->crypt($lastHash);
// Move over the params and args
$this->params[$i] = implode($passObj->getDelimiter(), $passObj->params);
$this->args[$i] = implode($passObj->getDelimiter(), $passObj->args);
$lastHash = $passObj->hash;
}
$this->hash = $lastHash;
}
protected function parseHash($hash)
{
parent::parseHash($hash);
$this->params['rounds'] = (int) $this->params['rounds'];
}
