/**
* Returns as a binary string the final AES key used for decrypting
* the database file, computed from the seeds and the master composite key.
* @return string
*/
private function transformKey()
{
$seed = $this->header->transformSeed;
$keyHash = $this->key->getHash();
/// does not yet support the case rounds >> 2**31
$rounds = $this->header->rounds->asInt();
$AESEncryptor = new CipherMcrypt(CipherMcrypt::AES128, 'ecb', $seed);
$AESEncryptor->load();
for ($i = 0; $i < $rounds; $i++) {
$keyHash = $AESEncryptor->encrypt($keyHash);
}
$AESEncryptor->unload();
$finalKey = HashHouse::hash($keyHash);
$aesKey = HashHouse::hash($this->header->masterSeed . $finalKey);
return $aesKey;
}
/**
* Stores the hash of the given password.
* @param string $pwd The string to hash.
*/
public function __construct($pwd)
{
$this->hash = HashHouse::hash($pwd);
}
