PBKDF2AlgorithmIdentifier::_paramsASN1() - Code Metrics - sop/pkcs5 - Measure and Improve Code Quality continuously with Scrutinizer

PBKDF2AlgorithmIdentifier::_paramsASN1() A
last analyzed 2019-05-23 07:36 UTC

↳ Parent: PBKDF2AlgorithmIdentifier

Complexity

Conditions	3
Paths	4

Size

Total Lines	12
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	9
CRAP Score	3

Importance

Changes

Metric	Value
eloc	8
dl	0
loc	12
c	0
b	0
f	0
ccs	9
cts	9
cp	1
rs	10
cc	3
nc	4
nop	0
crap	3

<?php

declare(strict_types = 1);

namespace Sop\PKCS5\ASN1\AlgorithmIdentifier;

use Sop\ASN1\Element;
use Sop\ASN1\Type\Constructed\Sequence;
use Sop\ASN1\Type\Primitive\Integer;
use Sop\ASN1\Type\Primitive\OctetString;
use Sop\ASN1\Type\UnspecifiedType;
use Sop\CryptoTypes\AlgorithmIdentifier\AlgorithmIdentifier;
use Sop\CryptoTypes\AlgorithmIdentifier\AlgorithmIdentifierFactory;
use Sop\CryptoTypes\AlgorithmIdentifier\Feature\PRFAlgorithmIdentifier;
use Sop\CryptoTypes\AlgorithmIdentifier\Hash\HMACWithSHA1AlgorithmIdentifier;
use Sop\CryptoTypes\AlgorithmIdentifier\SpecificAlgorithmIdentifier;

/*
From RFC 2898 - A.2   PBKDF2:

PBKDF2-params ::= SEQUENCE {
    salt CHOICE {
        specified OCTET STRING,
        otherSource AlgorithmIdentifier {{PBKDF2-SaltSources}}
    },
    iterationCount INTEGER (1..MAX),
    keyLength INTEGER (1..MAX) OPTIONAL,
    prf AlgorithmIdentifier {{PBKDF2-PRFs}} DEFAULT
    algid-hmacWithSHA1 }
*/

/**
 * Algorithm identifier for PBKDF2 key derivation function.
 *
 * @see https://tools.ietf.org/html/rfc2898#section-5.2
 * @see https://tools.ietf.org/html/rfc2898#appendix-A.2
 */
class PBKDF2AlgorithmIdentifier extends SpecificAlgorithmIdentifier
{
    const OID_PBKDF2 = '1.2.840.113549.1.5.12';

    /**
     * Explicitly specified salt.
     *
     * @var string
     */
    protected $_specifiedSalt;

    /**
     * Iteration count.
     *
     * @var int
     */
    protected $_iterationCount;

    /**
     * Key length.
     *
     * @var null|int
     */
    protected $_keyLength;

    /**
     * Pseudorandom function algorithm identifier.
     *
     * @var PRFAlgorithmIdentifier
     */
    protected $_prfAlgo;

    /**
     * Constructor.
     *
     * @param string                      $salt            Salt
     * @param int                         $iteration_count Iteration count
     * @param null|int                    $key_length      Optional key length
     * @param null|PRFAlgorithmIdentifier $prf_algo        Default to HMAC-SHA1
     */
    public function __construct(string $salt, int $iteration_count,
        ?int $key_length = null, ?PRFAlgorithmIdentifier $prf_algo = null)
    {
        $this->_oid = self::OID_PBKDF2;
        $this->_specifiedSalt = $salt;
        $this->_iterationCount = $iteration_count;
        $this->_keyLength = $key_length;
        $this->_prfAlgo = isset($prf_algo) ? $prf_algo : new HMACWithSHA1AlgorithmIdentifier();
    }

    /**
     * @param Sequence $seq
     *
     * @return AlgorithmIdentifier
     */
    public static function fromASN1(Sequence $seq): AlgorithmIdentifier
    {
        return (new AlgorithmIdentifierFactory(
            new PKCS5AlgorithmIdentifierProvider()))->parse($seq);
    }

    /**
     * {@inheritdoc}
     */
    public function name(): string
    {
        return 'pBKDF2';
    }

    /**
     * {@inheritdoc}
     *
     * @throws \RuntimeException
     *
     * @return self
     */
    public static function fromASN1Params(
        ?UnspecifiedType $params = null): SpecificAlgorithmIdentifier
    {
        if (!isset($params)) {
            throw new \UnexpectedValueException('No parameters.');
        }
        $seq = $params->asSequence();
        $el = $seq->at(0);
        switch ($el->tag()) {
            // specified
            case Element::TYPE_OCTET_STRING:
                $salt = $el->asOctetString()->string();
                break;
            // otherSource
            case Element::TYPE_SEQUENCE:
                AlgorithmIdentifier::fromASN1($el->asSequence());
                throw new \RuntimeException('otherSource not implemented.');
            default:
                throw new \UnexpectedValueException('Invalid salt encoding.');
        }
        $iteration_count = $seq->at(1)->asInteger()->intNumber();
        $key_length = null;
        $prf_algo = null;
        $idx = 2;
        if ($seq->has($idx, Element::TYPE_INTEGER)) {
            $key_length = $seq->at($idx++)->asInteger()->intNumber();
        }
        if ($seq->has($idx, Element::TYPE_SEQUENCE)) {
            $prf_algo = AlgorithmIdentifier::fromASN1(
                $seq->at($idx++)->asSequence());
            if (!($prf_algo instanceof PRFAlgorithmIdentifier)) {
                throw new \UnexpectedValueException(
                    sprintf('%s is not a supported pseudorandom function.',
                        $prf_algo->name()));
            }
        }
        return new self($salt, $iteration_count, $key_length, $prf_algo);
    }

    /**
     * Get salt.
     *
     * @return string
     */
    public function salt(): string
    {
        return $this->_specifiedSalt;
    }

    /**
     * Get iteration count.
     *
     * @return int
     */
    public function iterationCount(): int
    {
        return $this->_iterationCount;
    }

    /**
     * Whether key length is present.
     *
     * @return bool
     */
    public function hasKeyLength(): bool
    {
        return isset($this->_keyLength);
    }

    /**
     * Get key length.
     *
     * @throws \LogicException
     *
     * @return int
     */
    public function keyLength(): int
    {
        if (!$this->hasKeyLength()) {
            throw new \LogicException('keyLength not set.');
        }
        return $this->_keyLength;
    }

    /**
     * Get pseudorandom function algorithm.
     *
     * @return PRFAlgorithmIdentifier
     */
    public function prfAlgorithmIdentifier(): PRFAlgorithmIdentifier
    {
        return $this->_prfAlgo;
    }

    /**
     * {@inheritdoc}
     *
     * @return Sequence
     */
    protected function _paramsASN1(): ?Element
    {
        $elements = [];
        $elements[] = new OctetString($this->_specifiedSalt);
        $elements[] = new Integer($this->_iterationCount);
        if (isset($this->_keyLength)) {
            $elements[] = new Integer($this->_keyLength);
        }
        if (AlgorithmIdentifier::OID_HMAC_WITH_SHA1 !== $this->_prfAlgo->oid()) {
            $elements[] = $this->_prfAlgo->toASN1();
        }
        return new Sequence(...$elements);
    }
}


1		<?php
2
3		declare(strict_types = 1);
4
5		namespace Sop\PKCS5\ASN1\AlgorithmIdentifier;
6
7		use Sop\ASN1\Element;
8		use Sop\ASN1\Type\Constructed\Sequence;
9		use Sop\ASN1\Type\Primitive\Integer;
10		use Sop\ASN1\Type\Primitive\OctetString;
11		use Sop\ASN1\Type\UnspecifiedType;
12		use Sop\CryptoTypes\AlgorithmIdentifier\AlgorithmIdentifier;
13		use Sop\CryptoTypes\AlgorithmIdentifier\AlgorithmIdentifierFactory;
14		use Sop\CryptoTypes\AlgorithmIdentifier\Feature\PRFAlgorithmIdentifier;
15		use Sop\CryptoTypes\AlgorithmIdentifier\Hash\HMACWithSHA1AlgorithmIdentifier;
16		use Sop\CryptoTypes\AlgorithmIdentifier\SpecificAlgorithmIdentifier;
17
18		/*
19		From RFC 2898 - A.2 PBKDF2:
20
21		PBKDF2-params ::= SEQUENCE {
22		salt CHOICE {
23		specified OCTET STRING,
24		otherSource AlgorithmIdentifier {{PBKDF2-SaltSources}}
25		},
26		iterationCount INTEGER (1..MAX),
27		keyLength INTEGER (1..MAX) OPTIONAL,
28		prf AlgorithmIdentifier {{PBKDF2-PRFs}} DEFAULT
29		algid-hmacWithSHA1 }
30		*/
31
32		/**
33		* Algorithm identifier for PBKDF2 key derivation function.
34		*
35		* @see https://tools.ietf.org/html/rfc2898#section-5.2
36		* @see https://tools.ietf.org/html/rfc2898#appendix-A.2
37		*/
38		class PBKDF2AlgorithmIdentifier extends SpecificAlgorithmIdentifier
39		{
40		const OID_PBKDF2 = '1.2.840.113549.1.5.12';
41
42		/**
43		* Explicitly specified salt.
44		*
45		* @var string
46		*/
47		protected $_specifiedSalt;
48
49		/**
50		* Iteration count.
51		*
52		* @var int
53		*/
54		protected $_iterationCount;
55
56		/**
57		* Key length.
58		*
59		* @var null\|int
60		*/
61		protected $_keyLength;
62
63		/**
64		* Pseudorandom function algorithm identifier.
65		*
66		* @var PRFAlgorithmIdentifier
67		*/
68		protected $_prfAlgo;
69
70		/**
71		* Constructor.
72		*
73		* @param string $salt Salt
74		* @param int $iteration_count Iteration count
75		* @param null\|int $key_length Optional key length
76		* @param null\|PRFAlgorithmIdentifier $prf_algo Default to HMAC-SHA1
77		*/
78	8	public function __construct(string $salt, int $iteration_count,
79		?int $key_length = null, ?PRFAlgorithmIdentifier $prf_algo = null)
80		{
81	8	$this->_oid = self::OID_PBKDF2;
82	8	$this->_specifiedSalt = $salt;
83	8	$this->_iterationCount = $iteration_count;
84	8	$this->_keyLength = $key_length;
85	8	$this->_prfAlgo = isset($prf_algo) ? $prf_algo : new HMACWithSHA1AlgorithmIdentifier();
86	8	}
87
88		/**
89		* @param Sequence $seq
90		*
91		* @return AlgorithmIdentifier
92		*/
93	9	public static function fromASN1(Sequence $seq): AlgorithmIdentifier
94		{
95	9	return (new AlgorithmIdentifierFactory(
96	9	new PKCS5AlgorithmIdentifierProvider()))->parse($seq);
97		}
98
99		/**
100		* {@inheritdoc}
101		*/
102	1	public function name(): string
103		{
104	1	return 'pBKDF2';
105		}
106
107		/**
108		* {@inheritdoc}
109		*
110		* @throws \RuntimeException
111		*
112		* @return self
113		*/
114	8	public static function fromASN1Params(
115		?UnspecifiedType $params = null): SpecificAlgorithmIdentifier
116		{
117	8	if (!isset($params)) {
118	1	throw new \UnexpectedValueException('No parameters.');
119		}
120	7	$seq = $params->asSequence();
121	7	$el = $seq->at(0);
122	7	switch ($el->tag()) {
123		// specified
124	7	case Element::TYPE_OCTET_STRING:
125	5	$salt = $el->asOctetString()->string();
126	5	break;
127		// otherSource
128	2	case Element::TYPE_SEQUENCE:
129	1	AlgorithmIdentifier::fromASN1($el->asSequence());
130	1	throw new \RuntimeException('otherSource not implemented.');
131		default:
132	1	throw new \UnexpectedValueException('Invalid salt encoding.');
133		}
134	5	$iteration_count = $seq->at(1)->asInteger()->intNumber();
135	5	$key_length = null;
136	5	$prf_algo = null;
137	5	$idx = 2;
138	5	if ($seq->has($idx, Element::TYPE_INTEGER)) {
139	3	$key_length = $seq->at($idx++)->asInteger()->intNumber();
140		}
141	5	if ($seq->has($idx, Element::TYPE_SEQUENCE)) {
142	2	$prf_algo = AlgorithmIdentifier::fromASN1(
143	2	$seq->at($idx++)->asSequence());
144	2	if (!($prf_algo instanceof PRFAlgorithmIdentifier)) {
145	1	throw new \UnexpectedValueException(
146	1	sprintf('%s is not a supported pseudorandom function.',
147	1	$prf_algo->name()));
148		}
149		}
150	4	return new self($salt, $iteration_count, $key_length, $prf_algo);
151		}
152
153		/**
154		* Get salt.
155		*
156		* @return string
157		*/
158	3	public function salt(): string
159		{
160	3	return $this->_specifiedSalt;
161		}
162
163		/**
164		* Get iteration count.
165		*
166		* @return int
167		*/
168	3	public function iterationCount(): int
169		{
170	3	return $this->_iterationCount;
171		}
172
173		/**
174		* Whether key length is present.
175		*
176		* @return bool
177		*/
178	2	public function hasKeyLength(): bool
179		{
180	2	return isset($this->_keyLength);
181		}
182
183		/**
184		* Get key length.
185		*
186		* @throws \LogicException
187		*
188		* @return int
189		*/
190	2	public function keyLength(): int
191		{
192	2	if (!$this->hasKeyLength()) {
193	1	throw new \LogicException('keyLength not set.');
194		}
195	1	return $this->_keyLength;
196		}
197
198		/**
199		* Get pseudorandom function algorithm.
200		*
201		* @return PRFAlgorithmIdentifier
202		*/
203	4	public function prfAlgorithmIdentifier(): PRFAlgorithmIdentifier
204		{
205	4	return $this->_prfAlgo;
206		}
207
208		/**
209		* {@inheritdoc}
210		*
211		* @return Sequence
212		*/
213	3	protected function _paramsASN1(): ?Element
214		{
215	3	$elements = [];
216	3	$elements[] = new OctetString($this->_specifiedSalt);
217	3	$elements[] = new Integer($this->_iterationCount);
218	3	if (isset($this->_keyLength)) {
219	2	$elements[] = new Integer($this->_keyLength);
220		}
221	3	if (AlgorithmIdentifier::OID_HMAC_WITH_SHA1 !== $this->_prfAlgo->oid()) {
222	1	$elements[] = $this->_prfAlgo->toASN1();
223		}
224	3	return new Sequence(...$elements);
225		}
226		}
227

sop / pkcs5

PBKDF2AlgorithmIdentifier::_paramsASN1() A last analyzed 2019-05-23 07:36 UTC

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PBKDF2AlgorithmIdentifier::_paramsASN1() A
last analyzed 2019-05-23 07:36 UTC