JWSLoader::getAlgorithm() - Code Metrics - Inspection of "Tests refactored" - Spomky-Labs/jose - Measure and Improve Code Quality continuously with Scrutinizer

Failed Conditions

Push — v7 ( 73ebba...e5c6da )

by Florent

created 2017-09-19 15:42 UTC

JWSLoader::getAlgorithm() A

↳ Parent: JWSLoader

Complexity

Conditions	3
Paths	3

Size

Total Lines	14
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	14
rs	9.4285
c	0
b	0
f	0
cc	3
eloc	8
nc	3
nop	1

<?php

declare(strict_types=1);

/*
 * 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\Component\Signature;

use Base64Url\Base64Url;
use Jose\Component\Checker\HeaderCheckerManager;
use Jose\Component\Core\AlgorithmManager;
use Jose\Component\Core\JWK;
use Jose\Component\Core\JWKSet;
use Jose\Component\Core\Util\KeyChecker;

/**
 * Class able to load JWS and verify signatures and headers.
 */
final class JWSLoader
{
    /**
     * @var AlgorithmManager
     */
    private $signatureAlgorithmManager;

    /**
     * @var HeaderCheckerManager
     */
    private $headerCheckerManager;

    /**
     * JWSLoader constructor.
     *
     * @param AlgorithmManager           $signatureAlgorithmManager
     * @param HeaderCheckerManager $headerCheckerManager
     */
    public function __construct(AlgorithmManager $signatureAlgorithmManager, HeaderCheckerManager $headerCheckerManager)
    {
        $this->signatureAlgorithmManager = $signatureAlgorithmManager;
        $this->headerCheckerManager = $headerCheckerManager;
    }

    /**
     * @param string $input
     *
     * @return JWS
     */
    public function load(string $input): JWS
    {
        return JWSParser::parse($input);
    }

    /**
     * @return string[]
     */
    public function getSupportedSignatureAlgorithms(): array
    {
        return $this->signatureAlgorithmManager->list();
    }

    /**
     * @param JWS         $jws
     * @param JWK         $jwk
     * @param null|string $detachedPayload
     *
     * @return null|int                     If the JWS has been verified, an integer that represents the ID of the signature is set
     */
    public function verifyWithKey(JWS $jws, JWK $jwk, ?string $detachedPayload = null): ?int
    {
        $jwkset = JWKSet::createFromKeys([$jwk]);

        return $this->verifyWithKeySet($jws, $jwkset, $detachedPayload);
    }

    /**
     * Verify the signature of the input.
     * The input must be a valid JWS. This method is usually called after the "load" method.
     *
     * @param JWS         $jws             A JWS object
     * @param JWKSet      $jwkset          The signature will be verified using keys in the key set
     * @param null|string $detachedPayload If not null, the value must be the detached payload encoded in Base64 URL safe. If the input contains a payload, throws an exception.
     *
     * @return null|int                    If the JWS has been verified, an integer that represents the ID of the signature is set
     */
    public function verifyWithKeySet(JWS $jws, JWKSet $jwkset, ?string $detachedPayload = null): ?int
    {
        $signatureIndex = $this->verifySignatures($jws, $jwkset, $detachedPayload);
        if (null === $signatureIndex) {
            throw new \InvalidArgumentException('Unable to verify the JWS.');
        }
        $this->headerCheckerManager->checkJWS($jws, $signatureIndex);

        return $signatureIndex;
    }

    /**
     * @param JWS $jws
     * @param JWKSet $jwkset
     * @param Signature $signature
     * @param null|string $detachedPayload
     *
     * @return bool
     */
    private function verifySignature(JWS $jws, JWKSet $jwkset, Signature $signature, ?string $detachedPayload = null): bool
    {
        $input = $this->getInputToVerify($jws, $signature, $detachedPayload);
        foreach ($jwkset->all() as $jwk) {
            $algorithm = $this->getAlgorithm($signature);

            try {
                KeyChecker::checkKeyUsage($jwk, 'verification');
                KeyChecker::checkKeyAlgorithm($jwk, $algorithm->name());
                if (true === $algorithm->verify($jwk, $input, $signature->getSignature())) {
                    return true;
                }
            } catch (\Exception $e) {
                //We do nothing, we continue with other keys
                continue;
            }
        }

        return false;
    }

    /**
     * @param JWS         $jws
     * @param Signature   $signature
     * @param string|null $detachedPayload
     *
     * @return string
     */
    private function getInputToVerify(JWS $jws, Signature $signature, ?string $detachedPayload): string
    {
        $encodedProtectedHeaders = $signature->getEncodedProtectedHeaders();
        if (!$signature->hasProtectedHeader('b64') || true === $signature->getProtectedHeader('b64')) {
            if (null !== $jws->getEncodedPayload($signature)) {
                return sprintf('%s.%s', $encodedProtectedHeaders, $jws->getEncodedPayload($signature));
            }

            $payload = empty($jws->getPayload()) ? $detachedPayload : $jws->getPayload();

            return sprintf('%s.%s', $encodedProtectedHeaders, Base64Url::encode($payload));
        }

        $payload = empty($jws->getPayload()) ? $detachedPayload : $jws->getPayload();

        return sprintf('%s.%s', $encodedProtectedHeaders, $payload);
    }

    /**
     * @param JWS         $jws
     * @param JWKSet      $jwkset
     * @param string|null $detachedPayload
     *
     * @return null|int
     */
    private function verifySignatures(JWS $jws, JWKSet $jwkset, ?string $detachedPayload = null): ?int
    {
        $this->checkJWKSet($jwkset);
        $this->checkSignatures($jws);
        $this->checkPayload($jws, $detachedPayload);

        $nbSignatures = $jws->countSignatures();

        for ($i = 0; $i < $nbSignatures; ++$i) {
            $signature = $jws->getSignature($i);
            if (true === $this->verifySignature($jws, $jwkset, $signature, $detachedPayload)) {
                return $i;
            }
        }

        return null;
    }

    /**
     * @param JWS $jws
     */
    private function checkSignatures(JWS $jws)
    {
        if (0 === $jws->countSignatures()) {
            throw new \InvalidArgumentException('The JWS does not contain any signature.');
        }
    }

    /**
     * @param JWKSet $jwkset
     */
    private function checkJWKSet(JWKSet $jwkset)
    {
        if (0 === count($jwkset)) {
            throw new \InvalidArgumentException('There is no key in the key set.');
        }
    }

    /**
     * @param JWS         $jws
     * @param null|string $detachedPayload
     */
    private function checkPayload(JWS $jws, ?string $detachedPayload = null)
    {
        if (null !== $detachedPayload && !empty($jws->getPayload())) {
            throw new \InvalidArgumentException('A detached payload is set, but the JWS already has a payload.');
        }
        if (empty($jws->getPayload()) && null === $detachedPayload) {
            throw new \InvalidArgumentException('The JWS has a detached payload, but no payload is provided.');
        }
    }

    /**
     * @param Signature $signature
     *
     * @return SignatureAlgorithmInterface
     */
    private function getAlgorithm(Signature $signature): SignatureAlgorithmInterface
    {
        $completeHeaders = array_merge($signature->getProtectedHeaders(), $signature->getHeaders());
        if (!array_key_exists('alg', $completeHeaders)) {
            throw new \InvalidArgumentException('No "alg" parameter set in the header.');
        }

        $algorithm = $this->signatureAlgorithmManager->get($completeHeaders['alg']);
        if (!$algorithm instanceof SignatureAlgorithmInterface) {
            throw new \InvalidArgumentException(sprintf('The algorithm "%s" is not supported or is not a signature algorithm.', $completeHeaders['alg']));
        }

        return $algorithm;
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			/*
6			* The MIT License (MIT)
7			*
8			* Copyright (c) 2014-2017 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\Signature;
15
16			use Base64Url\Base64Url;
17			use Jose\Component\Checker\HeaderCheckerManager;
18			use Jose\Component\Core\AlgorithmManager;
19			use Jose\Component\Core\JWK;
20			use Jose\Component\Core\JWKSet;
21			use Jose\Component\Core\Util\KeyChecker;
22
23			/**
24			* Class able to load JWS and verify signatures and headers.
25			*/
26			final class JWSLoader
27			{
28			/**
29			* @var AlgorithmManager
30			*/
31			private $signatureAlgorithmManager;
32
33			/**
34			* @var HeaderCheckerManager
35			*/
36			private $headerCheckerManager;
37
38			/**
39			* JWSLoader constructor.
40			*
41			* @param AlgorithmManager $signatureAlgorithmManager
42			* @param HeaderCheckerManager $headerCheckerManager
43			*/
44			public function __construct(AlgorithmManager $signatureAlgorithmManager, HeaderCheckerManager $headerCheckerManager)
45			{
46			$this->signatureAlgorithmManager = $signatureAlgorithmManager;
47			$this->headerCheckerManager = $headerCheckerManager;
48			}
49
50			/**
51			* @param string $input
52			*
53			* @return JWS
54			*/
55			public function load(string $input): JWS
56			{
57			return JWSParser::parse($input);
58			}
59
60			/**
61			* @return string[]
62			*/
63			public function getSupportedSignatureAlgorithms(): array
64			{
65			return $this->signatureAlgorithmManager->list();
66			}
67
68			/**
69			* @param JWS $jws
70			* @param JWK $jwk
71			* @param null\|string $detachedPayload
72			*
73			* @return null\|int If the JWS has been verified, an integer that represents the ID of the signature is set
74			*/
75			public function verifyWithKey(JWS $jws, JWK $jwk, ?string $detachedPayload = null): ?int
76			{
77			$jwkset = JWKSet::createFromKeys([$jwk]);
78
79			return $this->verifyWithKeySet($jws, $jwkset, $detachedPayload);
80			}
81
82			/**
83			* Verify the signature of the input.
84			* The input must be a valid JWS. This method is usually called after the "load" method.
85			*
86			* @param JWS $jws A JWS object
87			* @param JWKSet $jwkset The signature will be verified using keys in the key set
88			* @param null\|string $detachedPayload If not null, the value must be the detached payload encoded in Base64 URL safe. If the input contains a payload, throws an exception.
89			*
90			* @return null\|int If the JWS has been verified, an integer that represents the ID of the signature is set
91			*/
92			public function verifyWithKeySet(JWS $jws, JWKSet $jwkset, ?string $detachedPayload = null): ?int
93			{
94			$signatureIndex = $this->verifySignatures($jws, $jwkset, $detachedPayload);
95			if (null === $signatureIndex) {
96			throw new \InvalidArgumentException('Unable to verify the JWS.');
97			}
98			$this->headerCheckerManager->checkJWS($jws, $signatureIndex);
99
100			return $signatureIndex;
101			}
102
103			/**
104			* @param JWS $jws
105			* @param JWKSet $jwkset
106			* @param Signature $signature
107			* @param null\|string $detachedPayload
108			*
109			* @return bool
110			*/
111			private function verifySignature(JWS $jws, JWKSet $jwkset, Signature $signature, ?string $detachedPayload = null): bool
112			{
113			$input = $this->getInputToVerify($jws, $signature, $detachedPayload);
114			foreach ($jwkset->all() as $jwk) {
115			$algorithm = $this->getAlgorithm($signature);
116
117			try {
118			KeyChecker::checkKeyUsage($jwk, 'verification');
119			KeyChecker::checkKeyAlgorithm($jwk, $algorithm->name());
120			if (true === $algorithm->verify($jwk, $input, $signature->getSignature())) {
121			return true;
122			}
123			} catch (\Exception $e) {
124			//We do nothing, we continue with other keys
125			continue;
126			}
127			}
128
129			return false;
130			}
131
132			/**
133			* @param JWS $jws
134			* @param Signature $signature
135			* @param string\|null $detachedPayload
136			*
137			* @return string
138			*/
139			private function getInputToVerify(JWS $jws, Signature $signature, ?string $detachedPayload): string
140			{
141			$encodedProtectedHeaders = $signature->getEncodedProtectedHeaders();
142			if (!$signature->hasProtectedHeader('b64') \|\| true === $signature->getProtectedHeader('b64')) {
143			if (null !== $jws->getEncodedPayload($signature)) {
144			return sprintf('%s.%s', $encodedProtectedHeaders, $jws->getEncodedPayload($signature));
145			}
146
147			$payload = empty($jws->getPayload()) ? $detachedPayload : $jws->getPayload();
148
149			return sprintf('%s.%s', $encodedProtectedHeaders, Base64Url::encode($payload));
150			}
151
152			$payload = empty($jws->getPayload()) ? $detachedPayload : $jws->getPayload();
153
154			return sprintf('%s.%s', $encodedProtectedHeaders, $payload);
155			}
156
157			/**
158			* @param JWS $jws
159			* @param JWKSet $jwkset
160			* @param string\|null $detachedPayload
161			*
162			* @return null\|int
163			*/
164			private function verifySignatures(JWS $jws, JWKSet $jwkset, ?string $detachedPayload = null): ?int
165			{
166			$this->checkJWKSet($jwkset);
167			$this->checkSignatures($jws);
168			$this->checkPayload($jws, $detachedPayload);
169
170			$nbSignatures = $jws->countSignatures();
171
172			for ($i = 0; $i < $nbSignatures; ++$i) {
173			$signature = $jws->getSignature($i);
174			if (true === $this->verifySignature($jws, $jwkset, $signature, $detachedPayload)) {
175			return $i;
176			}
177			}
178
179			return null;
180			}
181
182			/**
183			* @param JWS $jws
184			*/
185			private function checkSignatures(JWS $jws)
186			{
187			if (0 === $jws->countSignatures()) {
188			throw new \InvalidArgumentException('The JWS does not contain any signature.');
189			}
190			}
191
192			/**
193			* @param JWKSet $jwkset
194			*/
195			private function checkJWKSet(JWKSet $jwkset)
196			{
197			if (0 === count($jwkset)) {
198			throw new \InvalidArgumentException('There is no key in the key set.');
199			}
200			}
201
202			/**
203			* @param JWS $jws
204			* @param null\|string $detachedPayload
205			*/
206			private function checkPayload(JWS $jws, ?string $detachedPayload = null)
207			{
208			if (null !== $detachedPayload && !empty($jws->getPayload())) {
209			throw new \InvalidArgumentException('A detached payload is set, but the JWS already has a payload.');
210			}
211			if (empty($jws->getPayload()) && null === $detachedPayload) {
212			throw new \InvalidArgumentException('The JWS has a detached payload, but no payload is provided.');
213			}
214			}
215
216			/**
217			* @param Signature $signature
218			*
219			* @return SignatureAlgorithmInterface
220			*/
221			private function getAlgorithm(Signature $signature): SignatureAlgorithmInterface
222			{
223			$completeHeaders = array_merge($signature->getProtectedHeaders(), $signature->getHeaders());
224			if (!array_key_exists('alg', $completeHeaders)) {
225			throw new \InvalidArgumentException('No "alg" parameter set in the header.');
226			}
227
228			$algorithm = $this->signatureAlgorithmManager->get($completeHeaders['alg']);
229			if (!$algorithm instanceof SignatureAlgorithmInterface) {
230			throw new \InvalidArgumentException(sprintf('The algorithm "%s" is not supported or is not a signature algorithm.', $completeHeaders['alg']));
231			}
232
233			return $algorithm;
234			}
235			}
236

Spomky-Labs / jose

Push — v7 ( 73ebba...e5c6da )

JWSLoader::getAlgorithm() A

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