IPSECKEY::setGateway() - Code Metrics - Inspection of "Merge pull request #58 from Badcow/Version3" - Badcow/DNS - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( cf3275...8940db )

by Sam

created 2019-11-30 10:31 UTC

IPSECKEY::setGateway() A

↳ Parent: IPSECKEY

Complexity

Conditions	6
Paths	5

Size

Total Lines	16
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	11
CRAP Score	6.0208

Importance

Changes

Metric	Value
cc	6
eloc	12
c	0
b	0
f	0
nc	5
nop	1
dl	0
loc	16
ccs	11
cts	12
cp	0.9167
crap	6.0208
rs	9.2222

<?php

declare(strict_types=1);

/*
 * This file is part of Badcow DNS Library.
 *
 * (c) Samuel Williams <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Badcow\DNS\Rdata;

use Badcow\DNS\Parser\Tokens;
use Badcow\DNS\Validator;

/**
 * {@link https://tools.ietf.org/html/rfc4025}.
 */
class IPSECKEY implements RdataInterface
{
    use RdataTrait;

    const TYPE = 'IPSECKEY';
    const TYPE_CODE = 45;
    const ALGORITHM_NONE = 0;
    const ALGORITHM_DSA = 1;
    const ALGORITHM_RSA = 2;
    const ALGORITHM_ECDSA = 3;

    /**
     * This is an 8-bit precedence for this record.  It is interpreted in
     * the same way as the PREFERENCE field described in section 3.3.9 of
     * RFC 1035.
     *
     * Gateways listed in IPSECKEY records with lower precedence are to be
     * attempted first.  Where there is a tie in precedence, the order
     * should be non-deterministic.
     *
     * @var int
     */
    private $precedence;

    /**
     * The gateway type field indicates the format of the information that
     * is stored in the gateway field.
     *
     * The following values are defined:
     * - 0: No gateway is present.
     * - 1: A 4-byte IPv4 address is present.
     * - 2: A 16-byte IPv6 address is present.
     * - 3: A wire-encoded domain name is present.  The wire-encoded format is
     *      self-describing, so the length is implicit.  The domain name MUST
     *      NOT be compressed.  (See Section 3.3 of RFC 1035.)
     *
     * @var int
     */
    private $gatewayType;

    /**
     * 7-bit The algorithm type field identifies the public key's crypto-
     * graphic algorithm and determines the format of the public key field.
     * A value of 0 indicates that no key is present.
     *
     * The following values are defined:
     * - 1: A DSA key is present, in the format defined in RFC 2536.
     * - 2: A RSA key is present, in the format defined in RFC 3110.
     * - 3: An ECDSA key is present, in the format defined in RFC 6605.
     *
     * @var int
     */
    private $algorithm = 0;

    /**
     * The gateway field indicates a gateway to which an IPsec tunnel may be.
     * created in order to reach the entity named by this resource record.
     *
     * There are three formats:
     *
     * A 32-bit IPv4 address is present in the gateway field.  The data
     * portion is an IPv4 address as described in section 3.4.1 of RFC 1035.
     * This is a 32-bit number in network byte order.
     *
     * A 128-bit IPv6 address is present in the gateway field.  The data
     * portion is an IPv6 address as described in section 2.2 of RFC 3596
     * This is a 128-bit number in network byte order.
     *
     * The gateway field is a normal wire-encoded domain name, as described
     * in section 3.3 of RFC 1035. Compression MUST NOT be used.
     *
     * @var string|null
     */
    private $gateway;

    /**
     * Both the public key types defined in this document (RSA and DSA)
     * inherit their public key formats from the corresponding KEY RR
     * formats. Specifically, the public key field contains the
     * algorithm-specific portion of the KEY RR RDATA, which is all the KEY
     * RR DATA after the first four octets.  This is the same portion of the
     * KEY RR that must be specified by documents that define a DNSSEC
     * algorithm. Those documents also specify a message digest to be used
     * for generation of SIG RRs; that specification is not relevant for
     * IPSECKEY RRs.
     *
     * @var string|null
     */
    private $publicKey = null;

    /**
     * @return int
     */
    public function getPrecedence(): int
    {
        return $this->precedence;
    }

    /**
     * @param int $precedence
     *
     * @throws \InvalidArgumentException
     */
    public function setPrecedence(int $precedence): void
    {
        if (!Validator::isUnsignedInteger($precedence, 8)) {
            throw new \InvalidArgumentException('IPSECKEY precedence must be an 8-bit integer.');
        }
        $this->precedence = $precedence;
    }

    /**
     * @return int
     */
    public function getGatewayType(): int
    {
        return $this->gatewayType;
    }

    /**
     * @return int
     */
    public function getAlgorithm(): int
    {
        return $this->algorithm;
    }

    /**
     * @param int $algorithm
     *
     * @throws \InvalidArgumentException
     */
    private function setAlgorithm(int $algorithm): void
    {
        if (!Validator::isUnsignedInteger($algorithm, 8)) {
            throw new \InvalidArgumentException('IPSECKEY algorithm type must be an 8-bit integer.');
        }
        $this->algorithm = $algorithm;
    }

    /**
     * @return string|null
     */
    public function getGateway(): ?string
    {
        return $this->gateway;
    }

    /**
     * @param string|null $gateway either &null for no gateway, a fully qualified domain name, or an IPv4 or IPv6 address
     *
     * @throws \InvalidArgumentException
     */
    public function setGateway(?string $gateway): void
    {
        if (null === $gateway || '.' === $gateway) {
            $gateway = null;
            $this->gatewayType = 0;
        } elseif (Validator::ipv4($gateway)) {
            $this->gatewayType = 1;
        } elseif (Validator::ipv6($gateway)) {
            $this->gatewayType = 2;
        } elseif (Validator::fullyQualifiedDomainName($gateway)) {
            $this->gatewayType = 3;
        } else {
            throw new \InvalidArgumentException('The gateway must be a fully qualified domain name, null, or a valid IPv4 or IPv6 address.');
        }

        $this->gateway = $gateway;
    }

    /**
     * @return string|null base64 encoded public key
     */
    public function getPublicKey(): ?string
    {
        return $this->publicKey;
    }

    /**
     * @param int         $algorithm either IPSECKEY::ALGORITHM_NONE, IPSECKEY::ALGORITHM_DSA, IPSECKEY::ALGORITHM_RSA, or IPSECKEY::ALGORITHM_ECDSA
     * @param string|null $publicKey base64 encoded public key
     *
     * @throws \InvalidArgumentException
     */
    public function setPublicKey(int $algorithm, ?string $publicKey): void
    {
        if (null === $publicKey) {
            $this->publicKey = null;
            $this->setAlgorithm(0);

            return;
        }

        if (!Validator::isBase64Encoded($publicKey)) {
            throw new \InvalidArgumentException('The public key must be a valid base64 encoded string.');
        }

        $this->publicKey = (string) preg_replace('/[^a-zA-Z0-9\/+=]/', '', $publicKey);
        $this->setAlgorithm($algorithm);
    }

    /**
     * {@inheritdoc}
     */
    public function toText(): string
    {
        $vars = [$this->precedence, $this->gatewayType, $this->algorithm, $this->gateway, $this->publicKey];

        if (0 === $this->gatewayType) {
            $vars[3] = '.';
        }

        if (0 === $this->algorithm) {
            unset($vars[4]);
        }

        return implode(Tokens::SPACE, $vars);
    }

    /**
     * {@inheritdoc}
     */
    public function toWire(): string
    {
        $wire = pack('CCC', $this->precedence, $this->gatewayType, $this->algorithm);
        if (1 === $this->gatewayType || 2 === $this->gatewayType) {
            if (null === $this->gateway) {
                throw new \RuntimeException('Gateway cannot be null if IPSECKEY::gatewayType > 0.');
            }
            $wire .= inet_pton($this->gateway);
        } else {
            $wire .= RdataTrait::encodeName($this->gateway ?? '.');
        }

        if (self::ALGORITHM_NONE !== $this->algorithm && null !== $this->publicKey) {
            $wire .= base64_decode($this->publicKey);
        }

        return $wire;
    }

    /**
     * {@inheritdoc}
     *
     * @return IPSECKEY
     */
    public static function fromText(string $text): RdataInterface
    {
        $rdata = explode(Tokens::SPACE, $text);
        $ipseckey = new self();
        $ipseckey->setPrecedence((int) array_shift($rdata));
        array_shift($rdata); //Gateway type is inferred from setGateway.
        $algorithm = (int) array_shift($rdata);
        $ipseckey->setGateway((string) array_shift($rdata));

        $publicKey = (0 === $algorithm) ? null : implode('', $rdata);
        $ipseckey->setPublicKey($algorithm, $publicKey);

        return $ipseckey;
    }

    /**
     * {@inheritdoc}
     *
     * @return IPSECKEY
     */
    public static function fromWire(string $rdata): RdataInterface
    {
        $ipseckey = new self();
        $offset = 0;

        $integers = unpack('CPrecedence/CGatewayType/CAlgorithm', $rdata, $offset);
        $ipseckey->setPrecedence((int) $integers['Precedence']);
        $gatewayType = $integers['GatewayType'];
        $algorithm = $integers['Algorithm'];
        $offset += 3;
        $gateway = null;

        switch ($gatewayType) {
            case 0:
            case 3:
                $gateway = RdataTrait::decodeName($rdata, $offset);
                break;
            case 1:
                $gateway = inet_ntop(substr($rdata, $offset, 4));
                $offset += 4;
                break;
            case 2:
                $gateway = inet_ntop(substr($rdata, $offset, 16));
                $offset += 16;
                break;
            default:
                throw new \InvalidArgumentException(sprintf('Expected gateway type to be integer on [0,3], got "%d".', $gatewayType));
                break;
        }

        if (false === $gateway) {

            throw new \RuntimeException('Could not decode IP address.');
        }

        $ipseckey->setGateway($gateway);

        if (self::ALGORITHM_NONE !== $algorithm) {
            $publicKey = base64_encode(substr($rdata, $offset));
            $ipseckey->setPublicKey($algorithm, $publicKey);
        }

        return $ipseckey;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		/*
6		* This file is part of Badcow DNS Library.
7		*
8		* (c) Samuel Williams <[email protected]>
9		*
10		* For the full copyright and license information, please view the LICENSE
11		* file that was distributed with this source code.
12		*/
13
14		namespace Badcow\DNS\Rdata;
15
16		use Badcow\DNS\Parser\Tokens;
17		use Badcow\DNS\Validator;
18
19		/**
20		* {@link https://tools.ietf.org/html/rfc4025}.
21		*/
22		class IPSECKEY implements RdataInterface
23		{
24		use RdataTrait;
25
26		const TYPE = 'IPSECKEY';
27		const TYPE_CODE = 45;
28		const ALGORITHM_NONE = 0;
29		const ALGORITHM_DSA = 1;
30		const ALGORITHM_RSA = 2;
31		const ALGORITHM_ECDSA = 3;
32
33		/**
34		* This is an 8-bit precedence for this record. It is interpreted in
35		* the same way as the PREFERENCE field described in section 3.3.9 of
36		* RFC 1035.
37		*
38		* Gateways listed in IPSECKEY records with lower precedence are to be
39		* attempted first. Where there is a tie in precedence, the order
40		* should be non-deterministic.
41		*
42		* @var int
43		*/
44		private $precedence;
45
46		/**
47		* The gateway type field indicates the format of the information that
48		* is stored in the gateway field.
49		*
50		* The following values are defined:
51		* - 0: No gateway is present.
52		* - 1: A 4-byte IPv4 address is present.
53		* - 2: A 16-byte IPv6 address is present.
54		* - 3: A wire-encoded domain name is present. The wire-encoded format is
55		* self-describing, so the length is implicit. The domain name MUST
56		* NOT be compressed. (See Section 3.3 of RFC 1035.)
57		*
58		* @var int
59		*/
60		private $gatewayType;
61
62		/**
63		* 7-bit The algorithm type field identifies the public key's crypto-
64		* graphic algorithm and determines the format of the public key field.
65		* A value of 0 indicates that no key is present.
66		*
67		* The following values are defined:
68		* - 1: A DSA key is present, in the format defined in RFC 2536.
69		* - 2: A RSA key is present, in the format defined in RFC 3110.
70		* - 3: An ECDSA key is present, in the format defined in RFC 6605.
71		*
72		* @var int
73		*/
74		private $algorithm = 0;
75
76		/**
77		* The gateway field indicates a gateway to which an IPsec tunnel may be.
78		* created in order to reach the entity named by this resource record.
79		*
80		* There are three formats:
81		*
82		* A 32-bit IPv4 address is present in the gateway field. The data
83		* portion is an IPv4 address as described in section 3.4.1 of RFC 1035.
84		* This is a 32-bit number in network byte order.
85		*
86		* A 128-bit IPv6 address is present in the gateway field. The data
87		* portion is an IPv6 address as described in section 2.2 of RFC 3596
88		* This is a 128-bit number in network byte order.
89		*
90		* The gateway field is a normal wire-encoded domain name, as described
91		* in section 3.3 of RFC 1035. Compression MUST NOT be used.
92		*
93		* @var string\|null
94		*/
95		private $gateway;
96
97		/**
98		* Both the public key types defined in this document (RSA and DSA)
99		* inherit their public key formats from the corresponding KEY RR
100		* formats. Specifically, the public key field contains the
101		* algorithm-specific portion of the KEY RR RDATA, which is all the KEY
102		* RR DATA after the first four octets. This is the same portion of the
103		* KEY RR that must be specified by documents that define a DNSSEC
104		* algorithm. Those documents also specify a message digest to be used
105		* for generation of SIG RRs; that specification is not relevant for
106		* IPSECKEY RRs.
107		*
108		* @var string\|null
109		*/
110		private $publicKey = null;
111
112		/**
113		* @return int
114		*/
115	12	public function getPrecedence(): int
116		{
117	12	return $this->precedence;
118		}
119
120		/**
121		* @param int $precedence
122		*
123		* @throws \InvalidArgumentException
124		*/
125	24	public function setPrecedence(int $precedence): void
126		{
127	24	if (!Validator::isUnsignedInteger($precedence, 8)) {
128		throw new \InvalidArgumentException('IPSECKEY precedence must be an 8-bit integer.');
129		}
130	24	$this->precedence = $precedence;
131	24	}
132
133		/**
134		* @return int
135		*/
136	12	public function getGatewayType(): int
137		{
138	12	return $this->gatewayType;
139		}
140
141		/**
142		* @return int
143		*/
144	12	public function getAlgorithm(): int
145		{
146	12	return $this->algorithm;
147		}
148
149		/**
150		* @param int $algorithm
151		*
152		* @throws \InvalidArgumentException
153		*/
154	24	private function setAlgorithm(int $algorithm): void
155		{
156	24	if (!Validator::isUnsignedInteger($algorithm, 8)) {
157		throw new \InvalidArgumentException('IPSECKEY algorithm type must be an 8-bit integer.');
158		}
159	24	$this->algorithm = $algorithm;
160	24	}
161
162		/**
163		* @return string\|null
164		*/
165	12	public function getGateway(): ?string
166		{
167	12	return $this->gateway;
168		}
169
170		/**
171		* @param string\|null $gateway either &null for no gateway, a fully qualified domain name, or an IPv4 or IPv6 address
172		*
173		* @throws \InvalidArgumentException
174		*/
175	24	public function setGateway(?string $gateway): void
176		{
177	24	if (null === $gateway \|\| '.' === $gateway) {
178	4	$gateway = null;
179	4	$this->gatewayType = 0;
180	20	} elseif (Validator::ipv4($gateway)) {
181	8	$this->gatewayType = 1;
182	12	} elseif (Validator::ipv6($gateway)) {
183	4	$this->gatewayType = 2;
184	8	} elseif (Validator::fullyQualifiedDomainName($gateway)) {
185	8	$this->gatewayType = 3;
186		} else {
187		throw new \InvalidArgumentException('The gateway must be a fully qualified domain name, null, or a valid IPv4 or IPv6 address.');
188		}
189
190	24	$this->gateway = $gateway;
191	24	}
192
193		/**
194		* @return string\|null base64 encoded public key
195		*/
196	12	public function getPublicKey(): ?string
197		{
198	12	return $this->publicKey;
199		}
200
201		/**
202		* @param int $algorithm either IPSECKEY::ALGORITHM_NONE, IPSECKEY::ALGORITHM_DSA, IPSECKEY::ALGORITHM_RSA, or IPSECKEY::ALGORITHM_ECDSA
203		* @param string\|null $publicKey base64 encoded public key
204		*
205		* @throws \InvalidArgumentException
206		*/
207	24	public function setPublicKey(int $algorithm, ?string $publicKey): void
208		{
209	24	if (null === $publicKey) {
210	4	$this->publicKey = null;
211	4	$this->setAlgorithm(0);
212
213	4	return;
214		}
215
216	20	if (!Validator::isBase64Encoded($publicKey)) {
217		throw new \InvalidArgumentException('The public key must be a valid base64 encoded string.');
218		}
219
220	20	$this->publicKey = (string) preg_replace('/[^a-zA-Z0-9\/+=]/', '', $publicKey);
221	20	$this->setAlgorithm($algorithm);
222	20	}
223
224		/**
225		* {@inheritdoc}
226		*/
227	12	public function toText(): string
228		{
229	12	$vars = [$this->precedence, $this->gatewayType, $this->algorithm, $this->gateway, $this->publicKey];
230
231	12	if (0 === $this->gatewayType) {
232	2	$vars[3] = '.';
233		}
234
235	12	if (0 === $this->algorithm) {
236	2	unset($vars[4]);
237		}
238
239	12	return implode(Tokens::SPACE, $vars);
240		}
241
242		/**
243		* {@inheritdoc}
244		*/
245	6	public function toWire(): string
246		{
247	6	$wire = pack('CCC', $this->precedence, $this->gatewayType, $this->algorithm);
248	6	if (1 === $this->gatewayType \|\| 2 === $this->gatewayType) {
249	3	if (null === $this->gateway) {
250		throw new \RuntimeException('Gateway cannot be null if IPSECKEY::gatewayType > 0.');
251		}
252	3	$wire .= inet_pton($this->gateway);
253		} else {
254	3	$wire .= RdataTrait::encodeName($this->gateway ?? '.');
255		}
256
257	6	if (self::ALGORITHM_NONE !== $this->algorithm && null !== $this->publicKey) {
258	5	$wire .= base64_decode($this->publicKey);
259		}
260
261	6	return $wire;
262		}
263
264		/**
265		* {@inheritdoc}
266		*
267		* @return IPSECKEY
268		*/
269	6	public static function fromText(string $text): RdataInterface
270		{
271	6	$rdata = explode(Tokens::SPACE, $text);
272	6	$ipseckey = new self();
273	6	$ipseckey->setPrecedence((int) array_shift($rdata));
274	6	array_shift($rdata); //Gateway type is inferred from setGateway.
275	6	$algorithm = (int) array_shift($rdata);
276	6	$ipseckey->setGateway((string) array_shift($rdata));
277
278	6	$publicKey = (0 === $algorithm) ? null : implode('', $rdata);
279	6	$ipseckey->setPublicKey($algorithm, $publicKey);
280
281	6	return $ipseckey;
282		}
283
284		/**
285		* {@inheritdoc}
286		*
287		* @return IPSECKEY
288		*/
289	6	public static function fromWire(string $rdata): RdataInterface
290		{
291	6	$ipseckey = new self();
292	6	$offset = 0;
293
294	6	$integers = unpack('CPrecedence/CGatewayType/CAlgorithm', $rdata, $offset);
295	6	$ipseckey->setPrecedence((int) $integers['Precedence']);
296	6	$gatewayType = $integers['GatewayType'];
297	6	$algorithm = $integers['Algorithm'];
298	6	$offset += 3;
299	6	$gateway = null;
300
301	6	switch ($gatewayType) {
302	6	case 0:
303	5	case 3:
304	3	$gateway = RdataTrait::decodeName($rdata, $offset);
305	3	break;
306	3	case 1:
307	2	$gateway = inet_ntop(substr($rdata, $offset, 4));
308	2	$offset += 4;
309	2	break;
310	1	case 2:
311	1	$gateway = inet_ntop(substr($rdata, $offset, 16));
312	1	$offset += 16;
313	1	break;
314		default:
315		throw new \InvalidArgumentException(sprintf('Expected gateway type to be integer on [0,3], got "%d".', $gatewayType));
316		break;
317		}
318
319	6	if (false === $gateway) {
		0 ignored issues – show introduced 2019-11-28 09:22 UTC by Report Bug Copy Issue Report The condition `false === $gateway` is always `false`. Loading history...
320		throw new \RuntimeException('Could not decode IP address.');
321		}
322
323	6	$ipseckey->setGateway($gateway);
324
325	6	if (self::ALGORITHM_NONE !== $algorithm) {
326	5	$publicKey = base64_encode(substr($rdata, $offset));
327	5	$ipseckey->setPublicKey($algorithm, $publicKey);
328		}
329
330	6	return $ipseckey;
331		}
332		}
333

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IPSECKEY::setGateway() A

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