Issues in ECKey.php - Failed Issues - Inspection of "V7.0" - Spomky-Labs/jose - Measure and Improve Code Quality continuously with Scrutinizer

Failed Conditions

Pull Request — master (#303)

by Florent

created 2017-10-11 19:55 UTC

src/KeyConverter/ECKey.php (2 issues)

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Bug 2

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Major 2

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<?php

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2017 Spomky-Labs
 *
 * This software may be modified and distributed under the terms
 * of the MIT license.  See the LICENSE file for details.
 */

namespace Jose\KeyConverter;

use Assert\Assertion;
use Base64Url\Base64Url;
use FG\ASN1\ExplicitlyTaggedObject;
use FG\ASN1\ASNObject;
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 Jose\Object\JWKInterface;

final class ECKey extends Sequence
{
    /**
     * @var bool
     */
    private $private = false;

    /**
     * @var array
     */
    private $values = [];

    /**
     * @param \Jose\Object\JWKInterface|string|array $data
     */
    public function __construct($data)
    {
        parent::__construct();

        if ($data instanceof JWKInterface) {
            $this->loadJWK($data->getAll());
        } elseif (is_array($data)) {
            $this->loadJWK($data);
        } elseif (is_string($data)) {
            $this->loadPEM($data);
        } else {
            throw new \InvalidArgumentException('Unsupported input');
        }
        $this->private = isset($this->values['d']);
    }

    /**
     * @param string $data
     *
     * @throws \Exception
     * @throws \FG\ASN1\Exception\ParserException
     *
     * @return array
     */
    private function loadPEM($data)
    {
        $data = base64_decode(preg_replace('#-.*-|\r|\n#', '', $data));
        $asnObject = ASNObject::fromBinary($data);

        Assertion::isInstanceOf($asnObject, Sequence::class);
        $children = $asnObject->getChildren();
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
        if (self::isPKCS8($children)) {
            $children = self::loadPKCS8($children);
        }

        if (4 === count($children)) {
            return $this->loadPrivatePEM($children);
        } elseif (2 === count($children)) {
            return $this->loadPublicPEM($children);
        }

        throw new \Exception('Unable to load the key');
    }

    /**
     * @param array $children
     *
     * @return array
     */
    private function loadPKCS8(array $children)
    {
        $binary = hex2bin($children[2]->getContent());
        $asnObject = ASNObject::fromBinary($binary);
        Assertion::isInstanceOf($asnObject, Sequence::class);

        return $asnObject->getChildren();
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
    }

    /**
     * @param array $children
     *
     * @return bool
     */
    private function isPKCS8(array $children)
    {
        if (3 !== count($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;
    }

    /**
     * @param array $jwk
     */
    private function loadJWK(array $jwk)
    {
        Assertion::true(array_key_exists('kty', $jwk), 'JWK is not an Elliptic Curve key');
        Assertion::eq($jwk['kty'], 'EC', 'JWK is not an Elliptic Curve key');
        Assertion::true(array_key_exists('crv', $jwk), 'Curve parameter is missing');
        Assertion::true(array_key_exists('x', $jwk), 'Point parameters are missing');
        Assertion::true(array_key_exists('y', $jwk), 'Point parameters are missing');

        $this->values = $jwk;
        if (array_key_exists('d', $jwk)) {
            $this->initPrivateKey();
        } else {
            $this->initPublicKey();
        }
    }

    private function initPublicKey()
    {
        $oid_sequence = new Sequence();
        $oid_sequence->addChild(new ObjectIdentifier('1.2.840.10045.2.1'));
        $oid_sequence->addChild(new ObjectIdentifier($this->getOID($this->values['crv'])));
        $this->addChild($oid_sequence);

        $bits = '04';
        $bits .= bin2hex(Base64Url::decode($this->values['x']));
        $bits .= bin2hex(Base64Url::decode($this->values['y']));
        $this->addChild(new BitString($bits));
    }

    private function initPrivateKey()
    {
        $this->addChild(new Integer(1));
        $this->addChild(new OctetString(bin2hex(Base64Url::decode($this->values['d']))));

        $oid = new ObjectIdentifier($this->getOID($this->values['crv']));
        $this->addChild(new ExplicitlyTaggedObject(0, $oid));

        $bits = '04';
        $bits .= bin2hex(Base64Url::decode($this->values['x']));
        $bits .= bin2hex(Base64Url::decode($this->values['y']));
        $bit = new BitString($bits);
        $this->addChild(new ExplicitlyTaggedObject(1, $bit));
    }

    /**
     * @param array $children
     *
     * @throws \Exception
     *
     * @return array
     */
    private function loadPublicPEM(array $children)
    {
        Assertion::isInstanceOf($children[0], Sequence::class, 'Unsupported key type');

        $sub = $children[0]->getChildren();
        Assertion::isInstanceOf($sub[0], ObjectIdentifier::class, 'Unsupported key type');
        Assertion::eq('1.2.840.10045.2.1', $sub[0]->getContent(), 'Unsupported key type');

        Assertion::isInstanceOf($sub[1], ObjectIdentifier::class, 'Unsupported key type');
        Assertion::isInstanceOf($children[1], BitString::class, 'Unable to load the key');

        $bits = $children[1]->getContent();
        $bits_length = mb_strlen($bits, '8bit');

        Assertion::eq('04', mb_substr($bits, 0, 2, '8bit'), 'Unsupported key type');

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

    /**
     * @param \FG\ASN1\ASNObject $children
     */
    private function verifyVersion(ASNObject $children)
    {
        Assertion::isInstanceOf($children, Integer::class, 'Unable to load the key');
        Assertion::eq(1, $children->getContent(), 'Unable to load the key');
    }

    /**
     * @param \FG\ASN1\ASNObject $children
     * @param string|null        $x
     * @param string|null        $y
     */
    private function getXAndY(ASNObject $children, &$x, &$y)
    {
        Assertion::isInstanceOf($children, ExplicitlyTaggedObject::class, 'Unable to load the key');
        Assertion::isArray($children->getContent(), 'Unable to load the key');
        Assertion::isInstanceOf($children->getContent()[0], BitString::class, 'Unable to load the key');

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

        Assertion::eq('04', mb_substr($bits, 0, 2, '8bit'), 'Unsupported key type');

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

    /**
     * @param \FG\ASN1\ASNObject $children
     *
     * @return string
     */
    private function getD(ASNObject $children)
    {
        Assertion::isInstanceOf($children, '\FG\ASN1\Universal\OctetString', 'Unable to load the key');

        return $children->getContent();
    }

    /**
     * @param array $children
     *
     * @return array
     */
    private function loadPrivatePEM(array $children)
    {
        $this->verifyVersion($children[0]);
        $x = null;
        $y = null;
        $d = $this->getD($children[1]);
        $this->getXAndY($children[3], $x, $y);

        Assertion::isInstanceOf($children[2], ExplicitlyTaggedObject::class, 'Unable to load the key');
        Assertion::isArray($children[2]->getContent(), 'Unable to load the key');
        Assertion::isInstanceOf($children[2]->getContent()[0], ObjectIdentifier::class, 'Unable to load the key');

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

        $this->private = true;
        $this->values['kty'] = 'EC';
        $this->values['crv'] = $this->getCurve($curve);
        $this->values['d'] = Base64Url::encode(hex2bin($d));
        $this->values['x'] = Base64Url::encode(hex2bin($x));
        $this->values['y'] = Base64Url::encode(hex2bin($y));
    }

    /**
     * @return bool
     */
    public function isPrivate()
    {
        return $this->private;
    }

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

        return new self($data);
    }

    /**
     * @return string
     */
    public function __toString()
    {
        return $this->toPEM();
    }

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

    /**
     * @return string
     */
    public function toDER()
    {
        return $this->getBinary();
    }

    /**
     * @return string
     */
    public function toPEM()
    {
        $result = '-----BEGIN '.($this->private ? 'EC PRIVATE' : 'PUBLIC').' KEY-----'.PHP_EOL;
        $result .= chunk_split(base64_encode($this->getBinary()), 64, PHP_EOL);
        $result .= '-----END '.($this->private ? 'EC PRIVATE' : 'PUBLIC').' KEY-----'.PHP_EOL;

        return $result;
    }

    /**
     * @param $curve
     *
     * @return string
     */
    private function getOID($curve)
    {
        $curves = $this->getSupportedCurves();
        $oid = array_key_exists($curve, $curves) ? $curves[$curve] : null;

        Assertion::notNull($oid, 'Unsupported curve');

        return $oid;
    }

    /**
     * @param string $oid
     *
     * @return string
     */
    private function getCurve($oid)
    {
        $curves = $this->getSupportedCurves();
        $curve = array_search($oid, $curves, true);
        Assertion::string($curve, 'Unsupported OID');

        return $curve;
    }

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


Pull Request — master (#303)

src/KeyConverter/ECKey.php (2 issues)

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1			<?php
2
3			/*
4			* The MIT License (MIT)
5			*
6			* Copyright (c) 2014-2017 Spomky-Labs
7			*
8			* This software may be modified and distributed under the terms
9			* of the MIT license. See the LICENSE file for details.
10			*/
11
12			namespace Jose\KeyConverter;
13
14			use Assert\Assertion;
15			use Base64Url\Base64Url;
16			use FG\ASN1\ExplicitlyTaggedObject;
17			use FG\ASN1\ASNObject;
18			use FG\ASN1\Universal\BitString;
19			use FG\ASN1\Universal\Integer;
20			use FG\ASN1\Universal\ObjectIdentifier;
21			use FG\ASN1\Universal\OctetString;
22			use FG\ASN1\Universal\Sequence;
23			use Jose\Object\JWKInterface;
24
25			final class ECKey extends Sequence
26			{
27			/**
28			* @var bool
29			*/
30			private $private = false;
31
32			/**
33			* @var array
34			*/
35			private $values = [];
36
37			/**
38			* @param \Jose\Object\JWKInterface\|string\|array $data
39			*/
40			public function __construct($data)
41			{
42			parent::__construct();
43
44			if ($data instanceof JWKInterface) {
45			$this->loadJWK($data->getAll());
46			} elseif (is_array($data)) {
47			$this->loadJWK($data);
48			} elseif (is_string($data)) {
49			$this->loadPEM($data);
50			} else {
51			throw new \InvalidArgumentException('Unsupported input');
52			}
53			$this->private = isset($this->values['d']);
54			}
55
56			/**
57			* @param string $data
58			*
59			* @throws \Exception
60			* @throws \FG\ASN1\Exception\ParserException
61			*
62			* @return array
63			*/
64			private function loadPEM($data)
65			{
66			$data = base64_decode(preg_replace('#-.*-\|\r\|\n#', '', $data));
67			$asnObject = ASNObject::fromBinary($data);
68
69			Assertion::isInstanceOf($asnObject, Sequence::class);
70			$children = $asnObject->getChildren();
			0 ignored issues – show Bug introduced 2016-02-28 12:53 UTC by Report Bug Copy Issue Report Show Similar Issues like this The method `getChildren` does only exist in `FG\ASN1\Construct`, but not in `FG\ASN1\AbstractString a...d FG\ASN1\UnknownObject`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
71			if (self::isPKCS8($children)) {
72			$children = self::loadPKCS8($children);
73			}
74
75			if (4 === count($children)) {
76			return $this->loadPrivatePEM($children);
77			} elseif (2 === count($children)) {
78			return $this->loadPublicPEM($children);
79			}
80
81			throw new \Exception('Unable to load the key');
82			}
83
84			/**
85			* @param array $children
86			*
87			* @return array
88			*/
89			private function loadPKCS8(array $children)
90			{
91			$binary = hex2bin($children[2]->getContent());
92			$asnObject = ASNObject::fromBinary($binary);
93			Assertion::isInstanceOf($asnObject, Sequence::class);
94
95			return $asnObject->getChildren();
			0 ignored issues – show Bug introduced 2016-10-18 19:56 UTC by Report Bug Copy Issue Report Show Similar Issues like this The method `getChildren` does only exist in `FG\ASN1\Construct`, but not in `FG\ASN1\AbstractString a...d FG\ASN1\UnknownObject`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
96			}
97
98			/**
99			* @param array $children
100			*
101			* @return bool
102			*/
103			private function isPKCS8(array $children)
104			{
105			if (3 !== count($children)) {
106			return false;
107			}
108
109			$classes = [0 => Integer::class, 1 => Sequence::class, 2 => OctetString::class];
110			foreach ($classes as $k => $class) {
111			if (!$children[$k] instanceof $class) {
112			return false;
113			}
114			}
115
116			return true;
117			}
118
119			/**
120			* @param array $jwk
121			*/
122			private function loadJWK(array $jwk)
123			{
124			Assertion::true(array_key_exists('kty', $jwk), 'JWK is not an Elliptic Curve key');
125			Assertion::eq($jwk['kty'], 'EC', 'JWK is not an Elliptic Curve key');
126			Assertion::true(array_key_exists('crv', $jwk), 'Curve parameter is missing');
127			Assertion::true(array_key_exists('x', $jwk), 'Point parameters are missing');
128			Assertion::true(array_key_exists('y', $jwk), 'Point parameters are missing');
129
130			$this->values = $jwk;
131			if (array_key_exists('d', $jwk)) {
132			$this->initPrivateKey();
133			} else {
134			$this->initPublicKey();
135			}
136			}
137
138			private function initPublicKey()
139			{
140			$oid_sequence = new Sequence();
141			$oid_sequence->addChild(new ObjectIdentifier('1.2.840.10045.2.1'));
142			$oid_sequence->addChild(new ObjectIdentifier($this->getOID($this->values['crv'])));
143			$this->addChild($oid_sequence);
144
145			$bits = '04';
146			$bits .= bin2hex(Base64Url::decode($this->values['x']));
147			$bits .= bin2hex(Base64Url::decode($this->values['y']));
148			$this->addChild(new BitString($bits));
149			}
150
151			private function initPrivateKey()
152			{
153			$this->addChild(new Integer(1));
154			$this->addChild(new OctetString(bin2hex(Base64Url::decode($this->values['d']))));
155
156			$oid = new ObjectIdentifier($this->getOID($this->values['crv']));
157			$this->addChild(new ExplicitlyTaggedObject(0, $oid));
158
159			$bits = '04';
160			$bits .= bin2hex(Base64Url::decode($this->values['x']));
161			$bits .= bin2hex(Base64Url::decode($this->values['y']));
162			$bit = new BitString($bits);
163			$this->addChild(new ExplicitlyTaggedObject(1, $bit));
164			}
165
166			/**
167			* @param array $children
168			*
169			* @throws \Exception
170			*
171			* @return array
172			*/
173			private function loadPublicPEM(array $children)
174			{
175			Assertion::isInstanceOf($children[0], Sequence::class, 'Unsupported key type');
176
177			$sub = $children[0]->getChildren();
178			Assertion::isInstanceOf($sub[0], ObjectIdentifier::class, 'Unsupported key type');
179			Assertion::eq('1.2.840.10045.2.1', $sub[0]->getContent(), 'Unsupported key type');
180
181			Assertion::isInstanceOf($sub[1], ObjectIdentifier::class, 'Unsupported key type');
182			Assertion::isInstanceOf($children[1], BitString::class, 'Unable to load the key');
183
184			$bits = $children[1]->getContent();
185			$bits_length = mb_strlen($bits, '8bit');
186
187			Assertion::eq('04', mb_substr($bits, 0, 2, '8bit'), 'Unsupported key type');
188
189			$this->values['kty'] = 'EC';
190			$this->values['crv'] = $this->getCurve($sub[1]->getContent());
191			$this->values['x'] = Base64Url::encode(hex2bin(mb_substr($bits, 2, ($bits_length - 2) / 2, '8bit')));
192			$this->values['y'] = Base64Url::encode(hex2bin(mb_substr($bits, ($bits_length - 2) / 2 + 2, ($bits_length - 2) / 2, '8bit')));
193			}
194
195			/**
196			* @param \FG\ASN1\ASNObject $children
197			*/
198			private function verifyVersion(ASNObject $children)
199			{
200			Assertion::isInstanceOf($children, Integer::class, 'Unable to load the key');
201			Assertion::eq(1, $children->getContent(), 'Unable to load the key');
202			}
203
204			/**
205			* @param \FG\ASN1\ASNObject $children
206			* @param string\|null $x
207			* @param string\|null $y
208			*/
209			private function getXAndY(ASNObject $children, &$x, &$y)
210			{
211			Assertion::isInstanceOf($children, ExplicitlyTaggedObject::class, 'Unable to load the key');
212			Assertion::isArray($children->getContent(), 'Unable to load the key');
213			Assertion::isInstanceOf($children->getContent()[0], BitString::class, 'Unable to load the key');
214
215			$bits = $children->getContent()[0]->getContent();
216			$bits_length = mb_strlen($bits, '8bit');
217
218			Assertion::eq('04', mb_substr($bits, 0, 2, '8bit'), 'Unsupported key type');
219
220			$x = mb_substr($bits, 2, ($bits_length - 2) / 2, '8bit');
221			$y = mb_substr($bits, ($bits_length - 2) / 2 + 2, ($bits_length - 2) / 2, '8bit');
222			}
223
224			/**
225			* @param \FG\ASN1\ASNObject $children
226			*
227			* @return string
228			*/
229			private function getD(ASNObject $children)
230			{
231			Assertion::isInstanceOf($children, '\FG\ASN1\Universal\OctetString', 'Unable to load the key');
232
233			return $children->getContent();
234			}
235
236			/**
237			* @param array $children
238			*
239			* @return array
240			*/
241			private function loadPrivatePEM(array $children)
242			{
243			$this->verifyVersion($children[0]);
244			$x = null;
245			$y = null;
246			$d = $this->getD($children[1]);
247			$this->getXAndY($children[3], $x, $y);
248
249			Assertion::isInstanceOf($children[2], ExplicitlyTaggedObject::class, 'Unable to load the key');
250			Assertion::isArray($children[2]->getContent(), 'Unable to load the key');
251			Assertion::isInstanceOf($children[2]->getContent()[0], ObjectIdentifier::class, 'Unable to load the key');
252
253			$curve = $children[2]->getContent()[0]->getContent();
254
255			$this->private = true;
256			$this->values['kty'] = 'EC';
257			$this->values['crv'] = $this->getCurve($curve);
258			$this->values['d'] = Base64Url::encode(hex2bin($d));
259			$this->values['x'] = Base64Url::encode(hex2bin($x));
260			$this->values['y'] = Base64Url::encode(hex2bin($y));
261			}
262
263			/**
264			* @return bool
265			*/
266			public function isPrivate()
267			{
268			return $this->private;
269			}
270
271			/**
272			* @param \Jose\KeyConverter\ECKey $private
273			*
274			* @return \Jose\KeyConverter\ECKey
275			*/
276			public static function toPublic(ECKey $private)
277			{
278			$data = $private->toArray();
279			if (array_key_exists('d', $data)) {
280			unset($data['d']);
281			}
282
283			return new self($data);
284			}
285
286			/**
287			* @return string
288			*/
289			public function __toString()
290			{
291			return $this->toPEM();
292			}
293
294			/**
295			* @return array
296			*/
297			public function toArray()
298			{
299			return $this->values;
300			}
301
302			/**
303			* @return string
304			*/
305			public function toDER()
306			{
307			return $this->getBinary();
308			}
309
310			/**
311			* @return string
312			*/
313			public function toPEM()
314			{
315			$result = '-----BEGIN '.($this->private ? 'EC PRIVATE' : 'PUBLIC').' KEY-----'.PHP_EOL;
316			$result .= chunk_split(base64_encode($this->getBinary()), 64, PHP_EOL);
317			$result .= '-----END '.($this->private ? 'EC PRIVATE' : 'PUBLIC').' KEY-----'.PHP_EOL;
318
319			return $result;
320			}
321
322			/**
323			* @param $curve
324			*
325			* @return string
326			*/
327			private function getOID($curve)
328			{
329			$curves = $this->getSupportedCurves();
330			$oid = array_key_exists($curve, $curves) ? $curves[$curve] : null;
331
332			Assertion::notNull($oid, 'Unsupported curve');
333
334			return $oid;
335			}
336
337			/**
338			* @param string $oid
339			*
340			* @return string
341			*/
342			private function getCurve($oid)
343			{
344			$curves = $this->getSupportedCurves();
345			$curve = array_search($oid, $curves, true);
346			Assertion::string($curve, 'Unsupported OID');
347
348			return $curve;
349			}
350
351			/**
352			* @return array
353			*/
354			private function getSupportedCurves()
355			{
356			return [
357			'P-256' => '1.2.840.10045.3.1.7',
358			'P-384' => '1.3.132.0.34',
359			'P-521' => '1.3.132.0.35',
360			];
361			}
362			}
363

Spomky-Labs / jose

Pull Request — master (#303)

src/KeyConverter/ECKey.php (2 issues)

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