Padding::remove() - Code Metrics - sop/pkcs5 - Measure and Improve Code Quality continuously with Scrutinizer

Padding::remove() A
last analyzed 2019-05-23 07:36 UTC

↳ Parent: Padding

Complexity

Conditions	5
Paths	4

Size

Total Lines	15
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	11
CRAP Score	5

Importance

Changes

Metric	Value
eloc	10
dl	0
loc	15
c	0
b	0
f	0
ccs	11
cts	11
cp	1
rs	9.6111
cc	5
nc	4
nop	1
crap	5

<?php

declare(strict_types = 1);

namespace Sop\PKCS5;

/**
 * Implements PKCS#5 padding.
 *
 * @see https://tools.ietf.org/html/rfc8018#section-6.1.1
 */
class Padding
{
    /**
     * Padding blocksize.
     *
     * @var int
     */
    protected $_blocksize;

    /**
     * Constructor.
     *
     * @param int $blocksize Blocksize
     */
    public function __construct(int $blocksize = 8)
    {
        $this->_blocksize = $blocksize;
    }

    /**
     * Add padding.
     *
     * @param string $data
     *
     * @return string Data padded to blocksize
     */
    public function add(string $data): string
    {
        $n = $this->_blocksize - strlen($data) % $this->_blocksize;
        return $data . str_repeat(chr($n), $n);
    }

    /**
     * Remove padding.
     *
     * @param string $data
     *
     * @throws \UnexpectedValueException
     *
     * @return string
     */
    public function remove(string $data): string
    {
        $len = strlen($data);
        if (!$len) {
            throw new \UnexpectedValueException('No padding.');
        }
        $n = ord($data[$len - 1]);
        if ($len < $n || $n > $this->_blocksize) {
            throw new \UnexpectedValueException('Invalid padding length.');
        }
        $ps = substr($data, -$n);
        if ($ps !== str_repeat(chr($n), $n)) {
            throw new \UnexpectedValueException('Invalid padding string.');
        }
        return substr($data, 0, -$n);
    }
}


1		<?php
2
3		declare(strict_types = 1);
4
5		namespace Sop\PKCS5;
6
7		/**
8		* Implements PKCS#5 padding.
9		*
10		* @see https://tools.ietf.org/html/rfc8018#section-6.1.1
11		*/
12		class Padding
13		{
14		/**
15		* Padding blocksize.
16		*
17		* @var int
18		*/
19		protected $_blocksize;
20
21		/**
22		* Constructor.
23		*
24		* @param int $blocksize Blocksize
25		*/
26	17	public function __construct(int $blocksize = 8)
27		{
28	17	$this->_blocksize = $blocksize;
29	17	}
30
31		/**
32		* Add padding.
33		*
34		* @param string $data
35		*
36		* @return string Data padded to blocksize
37		*/
38	11	public function add(string $data): string
39		{
40	11	$n = $this->_blocksize - strlen($data) % $this->_blocksize;
41	11	return $data . str_repeat(chr($n), $n);
42		}
43
44		/**
45		* Remove padding.
46		*
47		* @param string $data
48		*
49		* @throws \UnexpectedValueException
50		*
51		* @return string
52		*/
53	15	public function remove(string $data): string
54		{
55	15	$len = strlen($data);
56	15	if (!$len) {
57	1	throw new \UnexpectedValueException('No padding.');
58		}
59	14	$n = ord($data[$len - 1]);
60	14	if ($len < $n \|\| $n > $this->_blocksize) {
61	3	throw new \UnexpectedValueException('Invalid padding length.');
62		}
63	11	$ps = substr($data, -$n);
64	11	if ($ps !== str_repeat(chr($n), $n)) {
65	1	throw new \UnexpectedValueException('Invalid padding string.');
66		}
67	10	return substr($data, 0, -$n);
68		}
69		}
70

sop / pkcs5

Padding::remove() A last analyzed 2019-05-23 07:36 UTC

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Padding::remove() A
last analyzed 2019-05-23 07:36 UTC