ECKey::toPublic() - Code Metrics - web-token/jwt-framework - Measure and Improve Code Quality continuously with Scrutinizer

ECKey::toPublic() A
last analyzed 2019-10-31 23:09 UTC

↳ Parent: ECKey

Complexity

Conditions	2
Paths	2

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	9
rs	9.9666
c	0
b	0
f	0
cc	2
nc	2
nop	1

<?php

declare(strict_types=1);

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2019 Spomky-Labs
 *
 * This software may be modified and distributed under the terms
 * of the MIT license.  See the LICENSE file for details.
 */

namespace Jose\Component\KeyManagement\KeyConverter;

use Base64Url\Base64Url;
use FG\ASN1\ASNObject;
use FG\ASN1\Exception\ParserException;
use FG\ASN1\ExplicitlyTaggedObject;
use FG\ASN1\Universal\BitString;
use FG\ASN1\Universal\Integer;
use FG\ASN1\Universal\ObjectIdentifier;
use FG\ASN1\Universal\OctetString;
use FG\ASN1\Universal\Sequence;
use InvalidArgumentException;

/**
 * @internal
 */
class ECKey
{
    /**
     * @var array
     */
    private $values = [];

    private function __construct(array $data)
    {
        $this->loadJWK($data);
    }

    public static function createFromPEM(string $pem): self
    {
        $data = self::loadPEM($pem);

        return new self($data);
    }

    /**
     * @param ECKey $private
     *
     * @return ECKey
     */
    public static function toPublic(self $private): self
    {
        $data = $private->toArray();
        if (\array_key_exists('d', $data)) {
            unset($data['d']);
        }

        return new self($data);
    }

    /**
     * @return array
     */
    public function toArray()
    {
        return $this->values;
    }

    /**
     * @throws InvalidArgumentException if the key cannot be loaded
     * @throws ParserException          if the key cannot be loaded
     */
    private static function loadPEM(string $data): array
    {
        $data = base64_decode(preg_replace('#-.*-|\r|\n#', '', $data), true);
        $asnObject = ASNObject::fromBinary($data);
        if (!$asnObject instanceof Sequence) {
            throw new InvalidArgumentException('Unable to load the key.');
        }
        $children = $asnObject->getChildren();
        if (self::isPKCS8($children)) {
            $children = self::loadPKCS8($children);
        }

        if (4 === \count($children)) {
            return self::loadPrivatePEM($children);
        }
        if (2 === \count($children)) {
            return self::loadPublicPEM($children);
        }

        throw new InvalidArgumentException('Unable to load the key.');
    }

    /**
     * @param ASNObject[] $children
     *
     * @throws InvalidArgumentException if the key cannot be loaded
     * @throws ParserException          if the key cannot be loaded
     */
    private static function loadPKCS8(array $children): array
    {
        $binary = hex2bin($children[2]->getContent());
        $asnObject = ASNObject::fromBinary($binary);
        if (!$asnObject instanceof Sequence) {
            throw new InvalidArgumentException('Unable to load the key.');
        }

        return $asnObject->getChildren();
    }

    /**
     * @throws InvalidArgumentException if the key cannot be loaded
     */
    private static function loadPublicPEM(array $children): array
    {
        if (!$children[0] instanceof Sequence) {
            throw new InvalidArgumentException('Unsupported key type.');
        }

        $sub = $children[0]->getChildren();
        if (!$sub[0] instanceof ObjectIdentifier) {
            throw new InvalidArgumentException('Unsupported key type.');
        }
        if ('1.2.840.10045.2.1' !== $sub[0]->getContent()) {
            throw new InvalidArgumentException('Unsupported key type.');
        }
        if (!$sub[1] instanceof ObjectIdentifier) {
            throw new InvalidArgumentException('Unsupported key type.');
        }
        if (!$children[1] instanceof BitString) {
            throw new InvalidArgumentException('Unable to load the key.');
        }

        $bits = $children[1]->getContent();
        $bits_length = mb_strlen($bits, '8bit');
        if (0 !== mb_strpos($bits, '04', 0, '8bit')) {
            throw new InvalidArgumentException('Unsupported key type');
        }

        $values = ['kty' => 'EC'];
        $values['crv'] = self::getCurve($sub[1]->getContent());
        $values['x'] = Base64Url::encode(hex2bin(mb_substr($bits, 2, ($bits_length - 2) / 2, '8bit')));
        $values['y'] = Base64Url::encode(hex2bin(mb_substr($bits, (int) (($bits_length - 2) / 2 + 2), ($bits_length - 2) / 2, '8bit')));

        return $values;
    }

    /**
     * @throws InvalidArgumentException if the OID is not supported
     */
    private static function getCurve(string $oid): string
    {
        $curves = self::getSupportedCurves();
        $curve = array_search($oid, $curves, true);
        if (!\is_string($curve)) {
            throw new InvalidArgumentException('Unsupported OID.');
        }

        return $curve;
    }

    private static function getSupportedCurves(): array
    {
        return [
            'P-256' => '1.2.840.10045.3.1.7',
            'P-384' => '1.3.132.0.34',
            'P-521' => '1.3.132.0.35',
        ];
    }

    /**
     * @throws InvalidArgumentException if the key cannot be loaded
     */
    private static function verifyVersion(ASNObject $children): void
    {
        if (!$children instanceof Integer || '1' !== $children->getContent()) {

            throw new InvalidArgumentException('Unable to load the key.');
        }
    }

    /**
     * @throws InvalidArgumentException if the key cannot be loaded
     */
    private static function getXAndY(ASNObject $children, string &$x, string &$y): void
    {
        if (!$children instanceof ExplicitlyTaggedObject || !\is_array($children->getContent())) {
            throw new InvalidArgumentException('Unable to load the key.');
        }
        if (!$children->getContent()[0] instanceof BitString) {
            throw new InvalidArgumentException('Unable to load the key.');
        }

        $bits = $children->getContent()[0]->getContent();
        $bits_length = mb_strlen($bits, '8bit');

        if (0 !== mb_strpos($bits, '04', 0, '8bit')) {
            throw new InvalidArgumentException('Unsupported key type');
        }

        $x = mb_substr($bits, 2, (int) (($bits_length - 2) / 2), '8bit');
        $y = mb_substr($bits, (int) (($bits_length - 2) / 2 + 2), (int) (($bits_length - 2) / 2), '8bit');
    }

    /**
     * @throws InvalidArgumentException if the key cannot be loaded
     */
    private static function getD(ASNObject $children): string
    {
        if (!$children instanceof OctetString) {
            throw new InvalidArgumentException('Unable to load the key.');
        }

        return $children->getContent();
    }

    /**
     * @throws InvalidArgumentException if the key cannot be loaded
     */
    private static function loadPrivatePEM(array $children): array
    {
        self::verifyVersion($children[0]);
        $x = '';
        $y = '';
        $d = self::getD($children[1]);
        self::getXAndY($children[3], $x, $y);

        if (!$children[2] instanceof ExplicitlyTaggedObject || !\is_array($children[2]->getContent())) {
            throw new InvalidArgumentException('Unable to load the key.');
        }
        if (!$children[2]->getContent()[0] instanceof ObjectIdentifier) {
            throw new InvalidArgumentException('Unable to load the key.');
        }

        $curve = $children[2]->getContent()[0]->getContent();

        $values = ['kty' => 'EC'];
        $values['crv'] = self::getCurve($curve);
        $values['d'] = Base64Url::encode(hex2bin($d));
        $values['x'] = Base64Url::encode(hex2bin($x));
        $values['y'] = Base64Url::encode(hex2bin($y));

        return $values;
    }

    /**
     * @param ASNObject[] $children
     */
    private static function isPKCS8(array $children): bool
    {
        if (3 !== \count($children)) {
            return false;
        }

        $classes = [0 => Integer::class, 1 => Sequence::class, 2 => OctetString::class];
        foreach ($classes as $k => $class) {
            if (!$children[$k] instanceof $class) {
                return false;
            }
        }

        return true;
    }

    /**
     * @throws InvalidArgumentException if the key is invalid
     */
    private function loadJWK(array $jwk): void
    {
        $keys = [
            'kty' => 'The key parameter "kty" is missing.',
            'crv' => 'Curve parameter is missing',
            'x' => 'Point parameters are missing.',
            'y' => 'Point parameters are missing.',
        ];
        foreach ($keys as $k => $v) {
            if (!\array_key_exists($k, $jwk)) {
                throw new InvalidArgumentException($v);
            }
        }

        if ('EC' !== $jwk['kty']) {
            throw new InvalidArgumentException('JWK is not an Elliptic Curve key.');
        }
        $this->values = $jwk;
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			/*
6			* The MIT License (MIT)
7			*
8			* Copyright (c) 2014-2019 Spomky-Labs
9			*
10			* This software may be modified and distributed under the terms
11			* of the MIT license. See the LICENSE file for details.
12			*/
13
14			namespace Jose\Component\KeyManagement\KeyConverter;
15
16			use Base64Url\Base64Url;
17			use FG\ASN1\ASNObject;
18			use FG\ASN1\Exception\ParserException;
19			use FG\ASN1\ExplicitlyTaggedObject;
20			use FG\ASN1\Universal\BitString;
21			use FG\ASN1\Universal\Integer;
22			use FG\ASN1\Universal\ObjectIdentifier;
23			use FG\ASN1\Universal\OctetString;
24			use FG\ASN1\Universal\Sequence;
25			use InvalidArgumentException;
26
27			/**
28			* @internal
29			*/
30			class ECKey
31			{
32			/**
33			* @var array
34			*/
35			private $values = [];
36
37			private function __construct(array $data)
38			{
39			$this->loadJWK($data);
40			}
41
42			public static function createFromPEM(string $pem): self
43			{
44			$data = self::loadPEM($pem);
45
46			return new self($data);
47			}
48
49			/**
50			* @param ECKey $private
51			*
52			* @return ECKey
53			*/
54			public static function toPublic(self $private): self
55			{
56			$data = $private->toArray();
57			if (\array_key_exists('d', $data)) {
58			unset($data['d']);
59			}
60
61			return new self($data);
62			}
63
64			/**
65			* @return array
66			*/
67			public function toArray()
68			{
69			return $this->values;
70			}
71
72			/**
73			* @throws InvalidArgumentException if the key cannot be loaded
74			* @throws ParserException if the key cannot be loaded
75			*/
76			private static function loadPEM(string $data): array
77			{
78			$data = base64_decode(preg_replace('#-.*-\|\r\|\n#', '', $data), true);
79			$asnObject = ASNObject::fromBinary($data);
80			if (!$asnObject instanceof Sequence) {
81			throw new InvalidArgumentException('Unable to load the key.');
82			}
83			$children = $asnObject->getChildren();
84			if (self::isPKCS8($children)) {
85			$children = self::loadPKCS8($children);
86			}
87
88			if (4 === \count($children)) {
89			return self::loadPrivatePEM($children);
90			}
91			if (2 === \count($children)) {
92			return self::loadPublicPEM($children);
93			}
94
95			throw new InvalidArgumentException('Unable to load the key.');
96			}
97
98			/**
99			* @param ASNObject[] $children
100			*
101			* @throws InvalidArgumentException if the key cannot be loaded
102			* @throws ParserException if the key cannot be loaded
103			*/
104			private static function loadPKCS8(array $children): array
105			{
106			$binary = hex2bin($children[2]->getContent());
107			$asnObject = ASNObject::fromBinary($binary);
108			if (!$asnObject instanceof Sequence) {
109			throw new InvalidArgumentException('Unable to load the key.');
110			}
111
112			return $asnObject->getChildren();
113			}
114
115			/**
116			* @throws InvalidArgumentException if the key cannot be loaded
117			*/
118			private static function loadPublicPEM(array $children): array
119			{
120			if (!$children[0] instanceof Sequence) {
121			throw new InvalidArgumentException('Unsupported key type.');
122			}
123
124			$sub = $children[0]->getChildren();
125			if (!$sub[0] instanceof ObjectIdentifier) {
126			throw new InvalidArgumentException('Unsupported key type.');
127			}
128			if ('1.2.840.10045.2.1' !== $sub[0]->getContent()) {
129			throw new InvalidArgumentException('Unsupported key type.');
130			}
131			if (!$sub[1] instanceof ObjectIdentifier) {
132			throw new InvalidArgumentException('Unsupported key type.');
133			}
134			if (!$children[1] instanceof BitString) {
135			throw new InvalidArgumentException('Unable to load the key.');
136			}
137
138			$bits = $children[1]->getContent();
139			$bits_length = mb_strlen($bits, '8bit');
140			if (0 !== mb_strpos($bits, '04', 0, '8bit')) {
141			throw new InvalidArgumentException('Unsupported key type');
142			}
143
144			$values = ['kty' => 'EC'];
145			$values['crv'] = self::getCurve($sub[1]->getContent());
146			$values['x'] = Base64Url::encode(hex2bin(mb_substr($bits, 2, ($bits_length - 2) / 2, '8bit')));
147			$values['y'] = Base64Url::encode(hex2bin(mb_substr($bits, (int) (($bits_length - 2) / 2 + 2), ($bits_length - 2) / 2, '8bit')));
148
149			return $values;
150			}
151
152			/**
153			* @throws InvalidArgumentException if the OID is not supported
154			*/
155			private static function getCurve(string $oid): string
156			{
157			$curves = self::getSupportedCurves();
158			$curve = array_search($oid, $curves, true);
159			if (!\is_string($curve)) {
160			throw new InvalidArgumentException('Unsupported OID.');
161			}
162
163			return $curve;
164			}
165
166			private static function getSupportedCurves(): array
167			{
168			return [
169			'P-256' => '1.2.840.10045.3.1.7',
170			'P-384' => '1.3.132.0.34',
171			'P-521' => '1.3.132.0.35',
172			];
173			}
174
175			/**
176			* @throws InvalidArgumentException if the key cannot be loaded
177			*/
178			private static function verifyVersion(ASNObject $children): void
179			{
180			if (!$children instanceof Integer \|\| '1' !== $children->getContent()) {
			0 ignored issues – show Unused Code Bug introduced 2017-10-06 14:35 UTC by Report Bug Copy Issue Report The strict comparison `!==` seems to always evaluate to `true` as the types of `'1'` (`string`) and `$children->getContent()` (`integer`) can never be identical. Maybe you want to use a loose comparison `!=` instead? Loading history...
181			throw new InvalidArgumentException('Unable to load the key.');
182			}
183			}
184
185			/**
186			* @throws InvalidArgumentException if the key cannot be loaded
187			*/
188			private static function getXAndY(ASNObject $children, string &$x, string &$y): void
189			{
190			if (!$children instanceof ExplicitlyTaggedObject \|\| !\is_array($children->getContent())) {
191			throw new InvalidArgumentException('Unable to load the key.');
192			}
193			if (!$children->getContent()[0] instanceof BitString) {
194			throw new InvalidArgumentException('Unable to load the key.');
195			}
196
197			$bits = $children->getContent()[0]->getContent();
198			$bits_length = mb_strlen($bits, '8bit');
199
200			if (0 !== mb_strpos($bits, '04', 0, '8bit')) {
201			throw new InvalidArgumentException('Unsupported key type');
202			}
203
204			$x = mb_substr($bits, 2, (int) (($bits_length - 2) / 2), '8bit');
205			$y = mb_substr($bits, (int) (($bits_length - 2) / 2 + 2), (int) (($bits_length - 2) / 2), '8bit');
206			}
207
208			/**
209			* @throws InvalidArgumentException if the key cannot be loaded
210			*/
211			private static function getD(ASNObject $children): string
212			{
213			if (!$children instanceof OctetString) {
214			throw new InvalidArgumentException('Unable to load the key.');
215			}
216
217			return $children->getContent();
218			}
219
220			/**
221			* @throws InvalidArgumentException if the key cannot be loaded
222			*/
223			private static function loadPrivatePEM(array $children): array
224			{
225			self::verifyVersion($children[0]);
226			$x = '';
227			$y = '';
228			$d = self::getD($children[1]);
229			self::getXAndY($children[3], $x, $y);
230
231			if (!$children[2] instanceof ExplicitlyTaggedObject \|\| !\is_array($children[2]->getContent())) {
232			throw new InvalidArgumentException('Unable to load the key.');
233			}
234			if (!$children[2]->getContent()[0] instanceof ObjectIdentifier) {
235			throw new InvalidArgumentException('Unable to load the key.');
236			}
237
238			$curve = $children[2]->getContent()[0]->getContent();
239
240			$values = ['kty' => 'EC'];
241			$values['crv'] = self::getCurve($curve);
242			$values['d'] = Base64Url::encode(hex2bin($d));
243			$values['x'] = Base64Url::encode(hex2bin($x));
244			$values['y'] = Base64Url::encode(hex2bin($y));
245
246			return $values;
247			}
248
249			/**
250			* @param ASNObject[] $children
251			*/
252			private static function isPKCS8(array $children): bool
253			{
254			if (3 !== \count($children)) {
255			return false;
256			}
257
258			$classes = [0 => Integer::class, 1 => Sequence::class, 2 => OctetString::class];
259			foreach ($classes as $k => $class) {
260			if (!$children[$k] instanceof $class) {
261			return false;
262			}
263			}
264
265			return true;
266			}
267
268			/**
269			* @throws InvalidArgumentException if the key is invalid
270			*/
271			private function loadJWK(array $jwk): void
272			{
273			$keys = [
274			'kty' => 'The key parameter "kty" is missing.',
275			'crv' => 'Curve parameter is missing',
276			'x' => 'Point parameters are missing.',
277			'y' => 'Point parameters are missing.',
278			];
279			foreach ($keys as $k => $v) {
280			if (!\array_key_exists($k, $jwk)) {
281			throw new InvalidArgumentException($v);
282			}
283			}
284
285			if ('EC' !== $jwk['kty']) {
286			throw new InvalidArgumentException('JWK is not an Elliptic Curve key.');
287			}
288			$this->values = $jwk;
289			}
290			}
291

web-token / jwt-framework

ECKey::toPublic() A last analyzed 2019-10-31 23:09 UTC

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ECKey::toPublic() A
last analyzed 2019-10-31 23:09 UTC