Returns a string of random bytes.
| public static generateRandomBytes ( integer $count ) : string | ||
| $count | integer | Number of bytes to generate |
| Résultat | string | Random bytes |
/**
* Returns the encryption key from the persistent cache or Data/Persistent directory. If none exists, a new
* encryption key will be generated and stored in the cache.
*
* @return string The configured encryption key stored in Data/Persistent/EncryptionKey
*/
protected function getEncryptionKey()
{
if ($this->encryptionKey === null) {
$this->encryptionKey = $this->cache->get('encryptionKey');
}
if ($this->encryptionKey === false && file_exists(FLOW_PATH_DATA . 'Persistent/EncryptionKey')) {
$this->encryptionKey = file_get_contents(FLOW_PATH_DATA . 'Persistent/EncryptionKey');
}
if ($this->encryptionKey === false) {
$this->encryptionKey = bin2hex(Utility\Algorithms::generateRandomBytes(48));
$this->cache->set('encryptionKey', $this->encryptionKey);
}
return $this->encryptionKey;
}
/**
* @test
*/
public function generateRandomBytesGeneratesRandomBytes()
{
$this->assertEquals(20, strlen(Algorithms::generateRandomBytes(20)));
}
/**
* Hash a password for storage using PBKDF2 and the configured parameters.
* Will use a combination of a random dynamic salt and the given static salt.
*
* @param string $password Cleartext password that should be hashed
* @param string $staticSalt Static salt that will be appended to the random dynamic salt
* @return string A Base64 encoded string with the derived key (hashed password) and dynamic salt
*/
public function hashPassword($password, $staticSalt = null)
{
$dynamicSalt = UtilityAlgorithms::generateRandomBytes($this->dynamicSaltLength);
$result = CryptographyAlgorithms::pbkdf2($password, $dynamicSalt . $staticSalt, $this->iterationCount, $this->derivedKeyLength, $this->algorithm);
return base64_encode($dynamicSalt) . ',' . base64_encode($result);
}
