1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Security\Core\Encoder;
use Symfony\Component\Security\Core\Exception\BadCredentialsException;
/**
* Pbkdf2PasswordEncoder uses the PBKDF2 (Password-Based Key Derivation Function 2).
*
* Providing a high level of Cryptographic security,
* PBKDF2 is recommended by the National Institute of Standards and Technology (NIST).
*
* But also warrants a warning, using PBKDF2 (with a high number of iterations) slows down the process.
* PBKDF2 should be used with caution and care.
*
* @author Sebastiaan Stok <s.stok@rollerscapes.net>
* @author Andrew Johnson
* @author Fabien Potencier <fabien@symfony.com>
*/
class Pbkdf2PasswordEncoder extends BasePasswordEncoder
{
private $algorithm;
private $encodeHashAsBase64;
private $iterations;
private $length;
/**
* Constructor.
*
* @param string $algorithm The digest algorithm to use
* @param bool $encodeHashAsBase64 Whether to base64 encode the password hash
* @param int $iterations The number of iterations to use to stretch the password hash
* @param int $length Length of derived key to create
*/
public function __construct($algorithm = 'sha512', $encodeHashAsBase64 = true, $iterations = 1000, $length = 40)
{
$this->algorithm = $algorithm;
$this->encodeHashAsBase64 = $encodeHashAsBase64;
$this->iterations = $iterations;
$this->length = $length;
}
/**
* {@inheritdoc}
*
* @throws \LogicException when the algorithm is not supported
*/
public function encodePassword($raw, $salt)
{
if ($this->isPasswordTooLong($raw)) {
throw new BadCredentialsException('Invalid password.');
}
if (!in_array($this->algorithm, hash_algos(), true)) {
throw new \LogicException(sprintf('The algorithm "%s" is not supported.', $this->algorithm));
}
$digest = hash_pbkdf2($this->algorithm, $raw, $salt, $this->iterations, $this->length, true);
return $this->encodeHashAsBase64 ? base64_encode($digest) : bin2hex($digest);
}
/**
* {@inheritdoc}
*/
public function isPasswordValid($encoded, $raw, $salt)
{
return !$this->isPasswordTooLong($raw) && $this->comparePasswords($encoded, $this->encodePassword($raw, $salt));
}
}
|
