KeyConverter::loadFromKey() - Code Metrics - Inspection of "Private keys from APN support" - Spomky-Labs/jose - Measure and Improve Code Quality continuously with Scrutinizer

Failed Conditions

Pull Request — master (#146)

by Florent

created 2016-10-18 19:53 UTC

KeyConverter::loadFromKey() A

↳ Parent: KeyConverter

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
c	0
b	0
f	0
dl	0
loc	8
rs	9.4285
cc	2
eloc	5
nc	2
nop	2

<?php

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2016 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;

/**
 * This class will help you to load an EC key or a RSA key/certificate (private or public) and get values to create a JWK object.
 */
final class KeyConverter
{
    /**
     * @param string $file
     *
     * @throws \InvalidArgumentException
     *
     * @return array
     */
    public static function loadKeyFromCertificateFile($file)
    {
        Assertion::true(file_exists($file), sprintf('File "%s" does not exist.', $file));
        $content = file_get_contents($file);

        return self::loadKeyFromCertificate($content);
    }

    /**
     * @param string $certificate
     *
     * @throws \InvalidArgumentException
     *
     * @return array
     */
    public static function loadKeyFromCertificate($certificate)
    {
        try {
            $res = openssl_x509_read($certificate);
        } catch (\Exception $e) {
            $certificate = self::convertDerToPem($certificate);
            $res = openssl_x509_read($certificate);
        }
        Assertion::false(false === $res, 'Unable to load the certificate');

        $values = self::loadKeyFromX509Resource($res);
        openssl_x509_free($res);

        return $values;
    }

    /**
     * @param resource $res
     *
     * @throws \Exception
     *
     * @return array
     */
    public static function loadKeyFromX509Resource($res)
    {
        $key = openssl_get_publickey($res);

        $details = openssl_pkey_get_details($key);
        if (isset($details['key'])) {
            $values = self::loadKeyFromPEM($details['key']);
            openssl_x509_export($res, $out);
            $values['x5c'] = [trim(preg_replace('#-.*-#', '', $out))];

            if (function_exists('openssl_x509_fingerprint')) {
                $values['x5t'] = Base64Url::encode(openssl_x509_fingerprint($res, 'sha1', true));
                $values['x5t#256'] = Base64Url::encode(openssl_x509_fingerprint($res, 'sha256', true));
            } else {
                openssl_x509_export($res, $pem);
                $values['x5t'] = Base64Url::encode(self::calculateX509Fingerprint($pem, 'sha1', true));
                $values['x5t#256'] = Base64Url::encode(self::calculateX509Fingerprint($pem, 'sha256', true));
            }

            return $values;
        }
        throw new \InvalidArgumentException('Unable to load the certificate');
    }

    /**
     * @param string      $file
     * @param null|string $password
     *
     * @throws \Exception
     *
     * @return array
     */
    public static function loadFromKeyFile($file, $password = null)
    {
        $content = file_get_contents($file);

        return self::loadFromKey($content, $password);
    }

    /**
     * @param string      $key
     * @param null|string $password
     *
     * @throws \Exception
     *
     * @return array
     */
    public static function loadFromKey($key, $password = null)
    {
        try {
            return self::loadKeyFromDER($key, $password);
        } catch (\Exception $e) {
            return self::loadKeyFromPEM($key, $password);
        }
    }

    /**
     * @param string      $der
     * @param null|string $password
     *
     * @throws \Exception
     *
     * @return array
     */
    private static function loadKeyFromDER($der, $password = null)
    {
        $pem = self::convertDerToPem($der);

        return self::loadKeyFromPEM($pem, $password);
    }

    /**
     * @param string      $pem
     * @param null|string $password
     *
     * @throws \Exception
     *
     * @return array
     */
    private static function loadKeyFromPEM($pem, $password = null)
    {
        if (preg_match('#DEK-Info: (.+),(.+)#', $pem, $matches)) {
            $pem = self::decodePem($pem, $matches, $password);
        }

        self::sanitizePEM($pem);

        $res = openssl_pkey_get_private($pem);
        if ($res === false) {
            $res = openssl_pkey_get_public($pem);
        }
        Assertion::false($res === false, 'Unable to load the key');

        $details = openssl_pkey_get_details($res);
        Assertion::isArray($details, 'Unable to get details of the key');
        Assertion::keyExists($details, 'type', 'Unable to get details of the key');

        switch ($details['type']) {
            case OPENSSL_KEYTYPE_EC:
                $ec_key = new ECKey($pem);

                return $ec_key->toArray();
            case OPENSSL_KEYTYPE_RSA:
                 $rsa_key = new RSAKey($pem);

                 return $rsa_key->toArray();
            default:
                throw new \InvalidArgumentException('Unsupported key type');
        }
    }

    /**
     * This method modify the PEM to get 64 char lines and fix bug with old OpenSSL versions
     *
     * @param string $pem
     */
    private static function sanitizePEM(&$pem)
    {
        preg_match_all('#(-.*-)#', $pem, $matches, PREG_PATTERN_ORDER);
        $ciphertext = preg_replace('#-.*-|\r|\n| #', '', $pem);

        $pem = $matches[0][0].PHP_EOL;
        $pem .= chunk_split($ciphertext, 64, PHP_EOL);
        $pem .= $matches[0][1].PHP_EOL;
    }

    /**
     * @param array $x5c
     *
     * @return array
     */
    public static function loadFromX5C(array $x5c)
    {
        $certificate = null;
        $last_issuer = null;
        $last_subject = null;
        foreach ($x5c as $cert) {
            $current_cert = '-----BEGIN CERTIFICATE-----'.PHP_EOL.$cert.PHP_EOL.'-----END CERTIFICATE-----';
            $x509 = openssl_x509_read($current_cert);
            if (false === $x509) {
                $last_issuer = null;
                $last_subject = null;
                break;
            }
            $parsed = openssl_x509_parse($x509);

            openssl_x509_free($x509);
            if (false === $parsed) {
                $last_issuer = null;
                $last_subject = null;
                break;
            }
            if (null === $last_subject) {
                $last_subject = $parsed['subject'];
                $last_issuer = $parsed['issuer'];
                $certificate = $current_cert;
            } else {
                if (json_encode($last_issuer) === json_encode($parsed['subject'])) {
                    $last_subject = $parsed['subject'];
                    $last_issuer = $parsed['issuer'];
                } else {
                    $last_issuer = null;
                    $last_subject = null;
                    break;
                }
            }
        }
        Assertion::false(
            null === $last_issuer || json_encode($last_issuer) !== json_encode($last_subject),
            'Invalid certificate chain.'
        );

        return self::loadKeyFromCertificate($certificate);
    }

    /**
     * @param string      $pem
     * @param string[]    $matches
     * @param null|string $password
     *
     * @return string
     */
    private static function decodePem($pem, array $matches, $password = null)
    {
        Assertion::notNull($password, 'Password required for encrypted keys.');

        $iv = pack('H*', trim($matches[2]));
        $iv_sub = mb_substr($iv, 0, 8, '8bit');
        $symkey = pack('H*', md5($password.$iv_sub));
        $symkey .= pack('H*', md5($symkey.$password.$iv_sub));
        $key = preg_replace('#^(?:Proc-Type|DEK-Info): .*#m', '', $pem);
        $ciphertext = base64_decode(preg_replace('#-.*-|\r|\n#', '', $key));

        $decoded = openssl_decrypt($ciphertext, strtolower($matches[1]), $symkey, true, $iv);

        $number = preg_match_all('#-{5}.*-{5}#', $pem, $result);
        Assertion::eq($number, 2, 'Unable to load the key');

        $pem = $result[0][0].PHP_EOL;
        $pem .= chunk_split(base64_encode($decoded), 64);
        $pem .= $result[0][1].PHP_EOL;

        return $pem;
    }

    /**
     * @param string $der_data
     *
     * @return string
     */
    private static function convertDerToPem($der_data)
    {
        $pem = chunk_split(base64_encode($der_data), 64, PHP_EOL);
        $pem = '-----BEGIN CERTIFICATE-----'.PHP_EOL.$pem.'-----END CERTIFICATE-----'.PHP_EOL;

        return $pem;
    }

    /**
     * @param string $pem
     * @param string $algorithm
     * @param bool   $binary
     *
     * @return string
     */
    private static function calculateX509Fingerprint($pem, $algorithm, $binary = false)
    {
        $pem = preg_replace('#-.*-|\r|\n#', '', $pem);
        $bin = base64_decode($pem);

        return hash($algorithm, $bin, $binary);
    }
}


1			<?php
2
3			/*
4			* The MIT License (MIT)
5			*
6			* Copyright (c) 2014-2016 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
17			/**
18			* This class will help you to load an EC key or a RSA key/certificate (private or public) and get values to create a JWK object.
19			*/
20			final class KeyConverter
21			{
22			/**
23			* @param string $file
24			*
25			* @throws \InvalidArgumentException
26			*
27			* @return array
28			*/
29			public static function loadKeyFromCertificateFile($file)
30			{
31			Assertion::true(file_exists($file), sprintf('File "%s" does not exist.', $file));
32			$content = file_get_contents($file);
33
34			return self::loadKeyFromCertificate($content);
35			}
36
37			/**
38			* @param string $certificate
39			*
40			* @throws \InvalidArgumentException
41			*
42			* @return array
43			*/
44			public static function loadKeyFromCertificate($certificate)
45			{
46			try {
47			$res = openssl_x509_read($certificate);
48			} catch (\Exception $e) {
49			$certificate = self::convertDerToPem($certificate);
50			$res = openssl_x509_read($certificate);
51			}
52			Assertion::false(false === $res, 'Unable to load the certificate');
53
54			$values = self::loadKeyFromX509Resource($res);
55			openssl_x509_free($res);
56
57			return $values;
58			}
59
60			/**
61			* @param resource $res
62			*
63			* @throws \Exception
64			*
65			* @return array
66			*/
67			public static function loadKeyFromX509Resource($res)
68			{
69			$key = openssl_get_publickey($res);
70
71			$details = openssl_pkey_get_details($key);
72			if (isset($details['key'])) {
73			$values = self::loadKeyFromPEM($details['key']);
74			openssl_x509_export($res, $out);
75			$values['x5c'] = [trim(preg_replace('#-.*-#', '', $out))];
76
77			if (function_exists('openssl_x509_fingerprint')) {
78			$values['x5t'] = Base64Url::encode(openssl_x509_fingerprint($res, 'sha1', true));
79			$values['x5t#256'] = Base64Url::encode(openssl_x509_fingerprint($res, 'sha256', true));
80			} else {
81			openssl_x509_export($res, $pem);
82			$values['x5t'] = Base64Url::encode(self::calculateX509Fingerprint($pem, 'sha1', true));
83			$values['x5t#256'] = Base64Url::encode(self::calculateX509Fingerprint($pem, 'sha256', true));
84			}
85
86			return $values;
87			}
88			throw new \InvalidArgumentException('Unable to load the certificate');
89			}
90
91			/**
92			* @param string $file
93			* @param null\|string $password
94			*
95			* @throws \Exception
96			*
97			* @return array
98			*/
99			public static function loadFromKeyFile($file, $password = null)
100			{
101			$content = file_get_contents($file);
102
103			return self::loadFromKey($content, $password);
104			}
105
106			/**
107			* @param string $key
108			* @param null\|string $password
109			*
110			* @throws \Exception
111			*
112			* @return array
113			*/
114			public static function loadFromKey($key, $password = null)
115			{
116			try {
117			return self::loadKeyFromDER($key, $password);
118			} catch (\Exception $e) {
119			return self::loadKeyFromPEM($key, $password);
120			}
121			}
122
123			/**
124			* @param string $der
125			* @param null\|string $password
126			*
127			* @throws \Exception
128			*
129			* @return array
130			*/
131			private static function loadKeyFromDER($der, $password = null)
132			{
133			$pem = self::convertDerToPem($der);
134
135			return self::loadKeyFromPEM($pem, $password);
136			}
137
138			/**
139			* @param string $pem
140			* @param null\|string $password
141			*
142			* @throws \Exception
143			*
144			* @return array
145			*/
146			private static function loadKeyFromPEM($pem, $password = null)
147			{
148			if (preg_match('#DEK-Info: (.+),(.+)#', $pem, $matches)) {
149			$pem = self::decodePem($pem, $matches, $password);
150			}
151
152			self::sanitizePEM($pem);
153
154			$res = openssl_pkey_get_private($pem);
155			if ($res === false) {
156			$res = openssl_pkey_get_public($pem);
157			}
158			Assertion::false($res === false, 'Unable to load the key');
159
160			$details = openssl_pkey_get_details($res);
161			Assertion::isArray($details, 'Unable to get details of the key');
162			Assertion::keyExists($details, 'type', 'Unable to get details of the key');
163
164			switch ($details['type']) {
165			case OPENSSL_KEYTYPE_EC:
166			$ec_key = new ECKey($pem);
167
168			return $ec_key->toArray();
169			case OPENSSL_KEYTYPE_RSA:
170			$rsa_key = new RSAKey($pem);
171
172			return $rsa_key->toArray();
173			default:
174			throw new \InvalidArgumentException('Unsupported key type');
175			}
176			}
177
178			/**
179			* This method modify the PEM to get 64 char lines and fix bug with old OpenSSL versions
180			*
181			* @param string $pem
182			*/
183			private static function sanitizePEM(&$pem)
184			{
185			preg_match_all('#(-.*-)#', $pem, $matches, PREG_PATTERN_ORDER);
186			$ciphertext = preg_replace('#-.*-\|\r\|\n\| #', '', $pem);
187
188			$pem = $matches[0][0].PHP_EOL;
189			$pem .= chunk_split($ciphertext, 64, PHP_EOL);
190			$pem .= $matches[0][1].PHP_EOL;
191			}
192
193			/**
194			* @param array $x5c
195			*
196			* @return array
197			*/
198			public static function loadFromX5C(array $x5c)
199			{
200			$certificate = null;
201			$last_issuer = null;
202			$last_subject = null;
203			foreach ($x5c as $cert) {
204			$current_cert = '-----BEGIN CERTIFICATE-----'.PHP_EOL.$cert.PHP_EOL.'-----END CERTIFICATE-----';
205			$x509 = openssl_x509_read($current_cert);
206			if (false === $x509) {
207			$last_issuer = null;
208			$last_subject = null;
209			break;
210			}
211			$parsed = openssl_x509_parse($x509);
212
213			openssl_x509_free($x509);
214			if (false === $parsed) {
215			$last_issuer = null;
216			$last_subject = null;
217			break;
218			}
219			if (null === $last_subject) {
220			$last_subject = $parsed['subject'];
221			$last_issuer = $parsed['issuer'];
222			$certificate = $current_cert;
223			} else {
224			if (json_encode($last_issuer) === json_encode($parsed['subject'])) {
225			$last_subject = $parsed['subject'];
226			$last_issuer = $parsed['issuer'];
227			} else {
228			$last_issuer = null;
229			$last_subject = null;
230			break;
231			}
232			}
233			}
234			Assertion::false(
235			null === $last_issuer \|\| json_encode($last_issuer) !== json_encode($last_subject),
236			'Invalid certificate chain.'
237			);
238
239			return self::loadKeyFromCertificate($certificate);
240			}
241
242			/**
243			* @param string $pem
244			* @param string[] $matches
245			* @param null\|string $password
246			*
247			* @return string
248			*/
249			private static function decodePem($pem, array $matches, $password = null)
250			{
251			Assertion::notNull($password, 'Password required for encrypted keys.');
252
253			$iv = pack('H*', trim($matches[2]));
254			$iv_sub = mb_substr($iv, 0, 8, '8bit');
255			$symkey = pack('H*', md5($password.$iv_sub));
256			$symkey .= pack('H*', md5($symkey.$password.$iv_sub));
257			$key = preg_replace('#^(?:Proc-Type\|DEK-Info): .*#m', '', $pem);
258			$ciphertext = base64_decode(preg_replace('#-.*-\|\r\|\n#', '', $key));
259
260			$decoded = openssl_decrypt($ciphertext, strtolower($matches[1]), $symkey, true, $iv);
261
262			$number = preg_match_all('#-{5}.*-{5}#', $pem, $result);
263			Assertion::eq($number, 2, 'Unable to load the key');
264
265			$pem = $result[0][0].PHP_EOL;
266			$pem .= chunk_split(base64_encode($decoded), 64);
267			$pem .= $result[0][1].PHP_EOL;
268
269			return $pem;
270			}
271
272			/**
273			* @param string $der_data
274			*
275			* @return string
276			*/
277			private static function convertDerToPem($der_data)
278			{
279			$pem = chunk_split(base64_encode($der_data), 64, PHP_EOL);
280			$pem = '-----BEGIN CERTIFICATE-----'.PHP_EOL.$pem.'-----END CERTIFICATE-----'.PHP_EOL;
281
282			return $pem;
283			}
284
285			/**
286			* @param string $pem
287			* @param string $algorithm
288			* @param bool $binary
289			*
290			* @return string
291			*/
292			private static function calculateX509Fingerprint($pem, $algorithm, $binary = false)
293			{
294			$pem = preg_replace('#-.*-\|\r\|\n#', '', $pem);
295			$bin = base64_decode($pem);
296
297			return hash($algorithm, $bin, $binary);
298			}
299			}
300

Spomky-Labs / jose

Pull Request — master (#146)

KeyConverter::loadFromKey() A

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