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<?php
/**
* Bcrypt hashing class
*
* @author Thiago Belem <contato@thiagobelem.net>
* @link https://gist.github.com/3438461
*/
class Bcrypt {
/**
* Default salt prefix
*
* @see http://www.php.net/security/crypt_blowfish.php
*
* @var string
*/
protected static $_saltPrefix = '2a';
/**
* Default hashing cost (4-31)
*
* @var integer
*/
protected static $_defaultCost = 8;
/**
* Salt limit length
*
* @var integer
*/
protected static $_saltLength = 22;
/**
* Hash a string
*
* @param string $string The string
* @param integer $cost The hashing cost
*
* @see http://www.php.net/manual/en/function.crypt.php
*
* @return string
*/
public static function hash($string, $cost = null) {
if (empty($cost)) {
$cost = self::$_defaultCost;
}
// Salt
$salt = self::generateRandomSalt();
// Hash string
$hashString = self::__generateHashString((int)$cost, $salt);
return crypt($string, $hashString);
}
/**
* Check a hashed string
*
* @param string $string The string
* @param string $hash The hash
*
* @return boolean
*/
public static function check($string, $hash) {
return (crypt($string, $hash) === $hash);
}
/**
* Generate a random base64 encoded salt
*
* @return string
*/
public static function generateRandomSalt() {
// Salt seed
$seed = uniqid(mt_rand(), true);
// Generate salt
$salt = base64_encode($seed);
$salt = str_replace('+', '.', $salt);
return substr($salt, 0, self::$_saltLength);
}
/**
* Build a hash string for crypt()
*
* @param integer $cost The hashing cost
* @param string $salt The salt
*
* @return string
*/
private static function __generateHashString($cost, $salt) {
return sprintf('$%s$%02d$%s$', self::$_saltPrefix, $cost, $salt);
}
}
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ghost commented Aug 4, 2013

I'll sure use it. Thanks!

@rafaelbeckel
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rafaelbeckel commented Jan 15, 2016

Cara, publica isso como um pacote do composer... =)

@kheoth
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kheoth commented Jun 23, 2016

cara valeu mesmo por disponibilizar seu código, vai me ajudar muito em um projeto!!!!

@brunopereiradonascimento

Show brother! Valeu!

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