OpensslWrapper::ivGenerate() - Code Metrics - Inspection of "master" - mmeyer2k/dcrypt - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( e5d930...4cc314 )

by Michael

created 2020-10-25 21:57 UTC

OpensslWrapper::ivGenerate() A

↳ Parent: OpensslWrapper

Complexity

Conditions	2
Paths	2

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	2

Importance

Changes

Metric	Value
dl	0
loc	10
ccs	5
cts	5
cp	1
rs	9.9332
c	0
b	0
f	0
cc	2
nc	2
nop	1
crap	2

<?php

declare(strict_types=1);

/**
 * OpensslWrapper.php.
 *
 * PHP version 7
 *
 * @category Dcrypt
 *
 * @author   Michael Meyer (mmeyer2k) <[email protected]>
 * @license  http://opensource.org/licenses/MIT The MIT License (MIT)
 *
 * @link     https://github.com/mmeyer2k/dcrypt
 */

namespace Dcrypt;

/**
 * A wrapper around any openssl_* functions.
 *
 * @category Dcrypt
 *
 * @author   Michael Meyer (mmeyer2k) <[email protected]>
 * @license  http://opensource.org/licenses/MIT The MIT License (MIT)
 *
 * @link     https://github.com/mmeyer2k/dcrypt
 */
class OpensslWrapper
{
    /**
     * OpenSSL encrypt wrapper function.
     *
     * @param string     $data Data to decrypt
     * @param OpensslKey $key  Key string
     * @param string     $tag  AAD tag
     *
     * @return string
     */
    protected static function opensslEncrypt(string $data, OpensslKey $key, string &$tag): string

    {
        list($iv, $enc, $cipher) = $key->wrapperVariables();

        if (self::tagLength($cipher) > 0) {
            return openssl_encrypt($data, $cipher, $enc, 1, $iv, $tag, '', 16);
        }

        return openssl_encrypt($data, $cipher, $enc, 1, $iv);
    }

    /**
     * OpenSSL decrypt wrapper function.
     *
     * @param string     $input Data to decrypt
     * @param OpensslKey $key   Key string
     * @param string     $tag   AAD authentication tag
     *
     * @return string
     */
    protected static function opensslDecrypt(string $input, OpensslKey $key, string $tag): string

    {
        list($iv, $enc, $cipher) = $key->wrapperVariables();

        if (self::tagLength($cipher) > 0) {
            return openssl_decrypt($input, $cipher, $enc, 1, $iv, $tag, '');
        }

        return openssl_decrypt($input, $cipher, $enc, 1, $iv);
    }

    /**
     * Get IV size for specified CIPHER.
     *
     * @param string $cipher Openssl cipher
     *
     * @return int
     */
    protected static function ivSize(string $cipher): int
    {
        return openssl_cipher_iv_length($cipher);
    }

    /**
     * Get a correctly sized IV for the specified cipher.
     *
     * @param string $cipher Openssl cipher
     *
     * @throws \Exception
     *
     * @return string
     */
    protected static function ivGenerate(string $cipher): string
    {
        $size = self::ivSize($cipher);

        if ($size === 0) {
            return '';
        }

        return random_bytes($size);
    }

    /**
     * Determines if the provided cipher requires a tag.
     *
     * @param string $cipher Openssl cipher
     *
     * @return int
     */
    protected static function tagLength(string $cipher): int
    {
        return stripos($cipher, '-gcm') || stripos($cipher, '-ccm') ? 16 : 0;
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			/**
6			* OpensslWrapper.php.
7			*
8			* PHP version 7
9			*
10			* @category Dcrypt
11			*
12			* @author Michael Meyer (mmeyer2k) <[email protected]>
13			* @license http://opensource.org/licenses/MIT The MIT License (MIT)
14			*
15			* @link https://github.com/mmeyer2k/dcrypt
16			*/
17
18			namespace Dcrypt;
19
20			/**
21			* A wrapper around any openssl_* functions.
22			*
23			* @category Dcrypt
24			*
25			* @author Michael Meyer (mmeyer2k) <[email protected]>
26			* @license http://opensource.org/licenses/MIT The MIT License (MIT)
27			*
28			* @link https://github.com/mmeyer2k/dcrypt
29			*/
30			class OpensslWrapper
31			{
32			/**
33			* OpenSSL encrypt wrapper function.
34			*
35			* @param string $data Data to decrypt
36			* @param OpensslKey $key Key string
37			* @param string $tag AAD tag
38			*
39			* @return string
40			*/
41	28	View Code Duplication	protected static function opensslEncrypt(string $data, OpensslKey $key, string &$tag): string
			0 ignored issues – show Duplication introduced 2020-10-21 21:23 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
42			{
43	28		list($iv, $enc, $cipher) = $key->wrapperVariables();
44
45	27		if (self::tagLength($cipher) > 0) {
46	12		return openssl_encrypt($data, $cipher, $enc, 1, $iv, $tag, '', 16);
47			}
48
49	17		return openssl_encrypt($data, $cipher, $enc, 1, $iv);
50			}
51
52			/**
53			* OpenSSL decrypt wrapper function.
54			*
55			* @param string $input Data to decrypt
56			* @param OpensslKey $key Key string
57			* @param string $tag AAD authentication tag
58			*
59			* @return string
60			*/
61	35	View Code Duplication	protected static function opensslDecrypt(string $input, OpensslKey $key, string $tag): string
			0 ignored issues – show Duplication introduced 2020-10-21 21:23 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
62			{
63	35		list($iv, $enc, $cipher) = $key->wrapperVariables();
64
65	35		if (self::tagLength($cipher) > 0) {
66	15		return openssl_decrypt($input, $cipher, $enc, 1, $iv, $tag, '');
67			}
68
69	23		return openssl_decrypt($input, $cipher, $enc, 1, $iv);
70			}
71
72			/**
73			* Get IV size for specified CIPHER.
74			*
75			* @param string $cipher Openssl cipher
76			*
77			* @return int
78			*/
79	46		protected static function ivSize(string $cipher): int
80			{
81	46		return openssl_cipher_iv_length($cipher);
82			}
83
84			/**
85			* Get a correctly sized IV for the specified cipher.
86			*
87			* @param string $cipher Openssl cipher
88			*
89			* @throws \Exception
90			*
91			* @return string
92			*/
93	37		protected static function ivGenerate(string $cipher): string
94			{
95	37		$size = self::ivSize($cipher);
96
97	36		if ($size === 0) {
98	6		return '';
99			}
100
101	32		return random_bytes($size);
102			}
103
104			/**
105			* Determines if the provided cipher requires a tag.
106			*
107			* @param string $cipher Openssl cipher
108			*
109			* @return int
110			*/
111	36		protected static function tagLength(string $cipher): int
112			{
113	36		return stripos($cipher, '-gcm') \|\| stripos($cipher, '-ccm') ? 16 : 0;
114			}
115			}
116

mmeyer2k / dcrypt

Push — master ( e5d930...4cc314 )

OpensslWrapper::ivGenerate() A

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