Ip::isAllowed() - Code Metrics - Inspection of "Fix #28: Implement context aware validation" - yiisoft/validator - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#41)

by Alexander

created 2019-12-26 12:57 UTC

Ip::isAllowed() A

↳ Parent: Ip

Complexity

Conditions	4
Paths	4

Size

Total Lines	14
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	4

Importance

Changes

Metric	Value
cc	4
eloc	7
nc	4
nop	1
dl	0
loc	14
ccs	8
cts	8
cp	1
crap	4
rs	10
c	0
b	0
f	0

<?php

namespace Yiisoft\Validator\Rule;

use Yiisoft\NetworkUtilities\IpHelper;
use Yiisoft\Validator\DataSetInterface;
use Yiisoft\Validator\Result;
use Yiisoft\Validator\Rule;

/**
 * The validator checks if the attribute value is a valid IPv4/IPv6 address or subnet.
 *
 * It also may change attribute's value if normalization of IPv6 expansion is enabled.
 *
 * The following are examples of validation rules using this validator:
 *
 * ```php
 * ['ip_address', 'ip'], // IPv4 or IPv6 address
 * ['ip_address', 'ip', 'ipv6' => false], // IPv4 address (IPv6 is disabled)
 * ['ip_address', 'ip', 'subnet' => true], // requires a CIDR prefix (like 10.0.0.1/24) for the IP address
 * ['ip_address', 'ip', 'subnet' => null], // CIDR prefix is optional
 * ['ip_address', 'ip', 'subnet' => null, 'normalize' => true], // CIDR prefix is optional and will be added when missing
 * ['ip_address', 'ip', 'ranges' => ['192.168.0.0/24']], // only IP addresses from the specified subnet are allowed
 * ['ip_address', 'ip', 'ranges' => ['!192.168.0.0/24', 'any']], // any IP is allowed except IP in the specified subnet
 * ['ip_address', 'ip', 'expandIPv6' => true], // expands IPv6 address to a full notation format
 * ```
 *
 * @property array $ranges The IPv4 or IPv6 ranges that are allowed or forbidden. See [[setRanges()]] for
 * detailed description.
 */
class Ip extends Rule
{
    /**
     * Negation char.
     *
     * Used to negate [[ranges]] or [[networks]] or to negate validating value when [[negation]] is set to `true`.
     *
     * @see allowNegation
     * @see networks
     * @see ranges
     */
    private const NEGATION_CHAR = '!';

    /**
     * @var array The network aliases, that can be used in [[ranges]].
     *  - key - alias name
     *  - value - array of strings. String can be an IP range, IP address or another alias. String can be
     *    negated with [[NEGATION_CHAR]] (independent of `negation` option).
     *
     * The following aliases are defined by default:
     *  - `*`: `any`
     *  - `any`: `0.0.0.0/0, ::/0`
     *  - `private`: `10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, fd00::/8`
     *  - `multicast`: `224.0.0.0/4, ff00::/8`
     *  - `linklocal`: `169.254.0.0/16, fe80::/10`
     *  - `localhost`: `127.0.0.0/8', ::1`
     *  - `documentation`: `192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24, 2001:db8::/32`
     *  - `system`: `multicast, linklocal, localhost, documentation`
     */
    private array $networks = [
        '*' => ['any'],
        'any' => ['0.0.0.0/0', '::/0'],
        'private' => ['10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16', 'fd00::/8'],
        'multicast' => ['224.0.0.0/4', 'ff00::/8'],
        'linklocal' => ['169.254.0.0/16', 'fe80::/10'],
        'localhost' => ['127.0.0.0/8', '::1'],
        'documentation' => ['192.0.2.0/24', '198.51.100.0/24', '203.0.113.0/24', '2001:db8::/32'],
        'system' => ['multicast', 'linklocal', 'localhost', 'documentation'],
    ];
    /**
     * @var bool whether the validating value can be an IPv6 address. Defaults to `true`.
     */
    private bool $allowIpv6 = true;
    /**
     * @var bool whether the validating value can be an IPv4 address. Defaults to `true`.
     */
    private bool $allowIpv4 = true;
    /**
     * @var bool whether the address can be an IP with CIDR subnet, like `192.168.10.0/24`.
     * The following values are possible:
     *
     * - `false` - the address must not have a subnet (default).
     * - `true` - specifying a subnet is optional.
     */
    private bool $allowSubnet = false;
    /**
     * @var bool
     */
    private bool $requireSubnet = false;
    /**
     * @var bool whether address may have a [[NEGATION_CHAR]] character at the beginning.
     * Defaults to `false`.
     */
    private bool $allowNegation = false;

    /**
     * @var string user-defined error message is used when validation fails due to the wrong IP address format.
     *
     * You may use the following placeholders in the message:
     *
     * - `{attribute}`: the label of the attribute being validated
     * - `{value}`: the value of the attribute being validated
     */
    private string $message = 'Must be a valid IP address.';
    /**
     * @var string user-defined error message is used when validation fails due to the disabled IPv6 validation.
     *
     * You may use the following placeholders in the message:
     *
     * - `{attribute}`: the label of the attribute being validated
     * - `{value}`: the value of the attribute being validated
     *
     * @see allowIpv6
     */
    private string $ipv6NotAllowed = 'Must not be an IPv6 address.';
    /**
     * @var string user-defined error message is used when validation fails due to the disabled IPv4 validation.
     *
     * You may use the following placeholders in the message:
     *
     * - `{attribute}`: the label of the attribute being validated
     * - `{value}`: the value of the attribute being validated
     *
     * @see allowIpv4
     */
    private string $ipv4NotAllowed = 'Must not be an IPv4 address.';
    /**
     * @var string user-defined error message is used when validation fails due to the wrong CIDR.
     *
     * You may use the following placeholders in the message:
     *
     * - `{attribute}`: the label of the attribute being validated
     * - `{value}`: the value of the attribute being validated
     * @see allowSubnet
     */
    private string $wrongCidr = 'Contains wrong subnet mask.';
    /**
     * @var string user-defined error message is used when validation fails due to subnet [[subnet]] set to 'only',
     * but the CIDR prefix is not set.
     *
     * You may use the following placeholders in the message:
     *
     * - `{attribute}`: the label of the attribute being validated
     * - `{value}`: the value of the attribute being validated
     *
     * @see allowSubnet
     */
    private string $noSubnet = 'Must be an IP address with specified subnet.';
    /**
     * @var string user-defined error message is used when validation fails
     * due to [[subnet]] is false, but CIDR prefix is present.
     *
     * You may use the following placeholders in the message:
     *
     * - `{attribute}`: the label of the attribute being validated
     * - `{value}`: the value of the attribute being validated
     *
     * @see allowSubnet
     */
    private string $hasSubnet = 'Must not be a subnet.';
    /**
     * @var string user-defined error message is used when validation fails due to IP address
     * is not not allowed by [[ranges]] check.
     *
     * You may use the following placeholders in the message:
     *
     * - `{attribute}`: the label of the attribute being validated
     * - `{value}`: the value of the attribute being validated
     *
     * @see ranges
     */
    private string $notInRange = 'Is not in the allowed range.';

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

    /**
     * Set the IPv4 or IPv6 ranges that are allowed or forbidden.
     *
     * The following preparation tasks are performed:
     *
     * - Recursively substitutes aliases (described in [[networks]]) with their values.
     * - Removes duplicates
     *
     * @param array $ranges the IPv4 or IPv6 ranges that are allowed or forbidden.
     *
     * When the array is empty, or the option not set, all IP addresses are allowed.
     *
     * Otherwise, the rules are checked sequentially until the first match is found.
     * An IP address is forbidden, when it has not matched any of the rules.
     *
     * Example:
     *
     * ```php
     * (new Ip())->ranges([
     *          '192.168.10.128'
     *          '!192.168.10.0/24',
     *          'any' // allows any other IP addresses
     *      ]);
     * ```
     *
     * In this example, access is allowed for all the IPv4 and IPv6 addresses excluding the `192.168.10.0/24` subnet.
     * IPv4 address `192.168.10.128` is also allowed, because it is listed before the restriction.
     */
    public function ranges(array $ranges): self
    {
        $this->ranges = $this->prepareRanges($ranges);
        return $this;
    }

    public function getRanges(): array
    {
        return $this->ranges;
    }

    public function allowIpv4(): self
    {
        $this->allowIpv4 = true;
        return $this;
    }

    public function disallowIpv4(): self
    {
        $this->allowIpv4 = false;
        return $this;
    }

    public function allowIpv6(): self
    {
        $this->allowIpv6 = true;
        return $this;
    }

    public function disallowIpv6(): self
    {
        $this->allowIpv6 = false;
        return $this;
    }

    public function allowNegation(): self
    {
        $this->allowNegation = true;
        return $this;
    }

    public function disallowNegation(): self
    {
        $this->allowNegation = false;
        return $this;
    }

    public function allowSubnet(): self
    {
        $this->allowSubnet = true;
        $this->requireSubnet = false;
        return $this;
    }

    public function requireSubnet(): self
    {
        $this->allowSubnet = true;
        $this->requireSubnet = true;
        return $this;
    }

    public function disallowSubnet(): self
    {
        $this->allowSubnet = false;
        $this->requireSubnet = false;
        return $this;
    }

    protected function validateValue($value, DataSetInterface $dataSet = null): Result
    {
        if (!$this->allowIpv4 && !$this->allowIpv6) {
            throw new \RuntimeException('Both IPv4 and IPv6 checks can not be disabled at the same time');
        }
        $result = new Result();
        if (!is_string($value)) {
            $result->addError($this->formatMessage($this->message));
            return $result;
        }

        if (preg_match($this->getIpParsePattern(), $value, $matches) === 0) {
            $result->addError($this->formatMessage($this->message));
            return $result;
        }
        $negation = !empty($matches['not'] ?? null);
        $ip = $matches['ip'];
        $cidr = $matches['cidr'] ?? null;
        $ipCidr = $matches['ipCidr'];

        try {
            $ipVersion = IpHelper::getIpVersion($ip, false);
        } catch (\InvalidArgumentException $e) {
            $result->addError($this->formatMessage($this->message));
            return $result;
        }

        if ($this->requireSubnet === true && $cidr === null) {
            $result->addError($this->formatMessage($this->noSubnet));
            return $result;
        }
        if ($this->allowSubnet === false && $cidr !== null) {
            $result->addError($this->formatMessage($this->hasSubnet));
            return $result;
        }
        if ($this->allowNegation === false && $negation) {
            $result->addError($this->formatMessage($this->message));
            return $result;
        }
        if ($ipVersion === IpHelper::IPV6 && !$this->allowIpv6) {
            $result->addError($this->formatMessage($this->ipv6NotAllowed));
            return $result;
        }
        if ($ipVersion === IpHelper::IPV4 && !$this->allowIpv4) {
            $result->addError($this->formatMessage($this->ipv4NotAllowed));
            return $result;
        }
        if (!$result->isValid()) {
            return $result;
        }
        if ($cidr !== null) {
            try {
                $cidr = IpHelper::getCidrBits($ipCidr);

            } catch (\InvalidArgumentException $e) {
                $result->addError($this->formatMessage($this->wrongCidr));
                return $result;
            }
        }
        if (!$this->isAllowed($ipCidr)) {
            $result->addError($this->formatMessage($this->notInRange));
            return $result;
        }

        return $result;
    }

    /**
     * The method checks whether the IP address with specified CIDR is allowed according to the [[ranges]] list.
     *
     * @see ranges
     */
    private function isAllowed(string $ip): bool
    {
        if (empty($this->ranges)) {
            return true;
        }

        foreach ($this->ranges as $string) {
            [$isNegated, $range] = $this->parseNegatedRange($string);
            if (IpHelper::inRange($ip, $range)) {
                return !$isNegated;
            }
        }

        return false;
    }

    /**
     * Parses IP address/range for the negation with [[NEGATION_CHAR]].
     *
     * @param $string
     * @return array `[0 => bool, 1 => string]`
     *  - boolean: whether the string is negated
     *  - string: the string without negation (when the negation were present)
     */
    private function parseNegatedRange($string): array
    {
        $isNegated = strpos($string, static::NEGATION_CHAR) === 0;
        return [$isNegated, $isNegated ? substr($string, strlen(static::NEGATION_CHAR)) : $string];
    }

    /**
     * Prepares array to fill in [[ranges]].
     *
     *  - Recursively substitutes aliases, described in [[networks]] with their values,
     *  - Removes duplicates.
     *
     * @param array $ranges
     * @return array
     * @see networks
     */
    private function prepareRanges(array $ranges): array
    {
        $result = [];
        foreach ($ranges as $string) {
            [$isRangeNegated, $range] = $this->parseNegatedRange($string);
            if (isset($this->networks[$range])) {
                $replacements = $this->prepareRanges($this->networks[$range]);
                foreach ($replacements as &$replacement) {
                    [$isReplacementNegated, $replacement] = $this->parseNegatedRange($replacement);
                    $result[] = ($isRangeNegated && !$isReplacementNegated ? static::NEGATION_CHAR : '') . $replacement;
                }
            } else {
                $result[] = $string;
            }
        }

        return array_unique($result);
    }

    /**
     * Used to get the Regexp pattern for initial IP address parsing.
     * @return string
     */
    public function getIpParsePattern(): string
    {
        return '/^(?<not>' . preg_quote(static::NEGATION_CHAR, '/') . ')?(?<ipCidr>(?<ip>(?:' . IpHelper::IPV4_PATTERN . ')|(?:' . IpHelper::IPV6_PATTERN . '))(?:\/(?<cidr>-?\d+))?)$/';
    }
}


1		<?php
2
3		namespace Yiisoft\Validator\Rule;
4
5		use Yiisoft\NetworkUtilities\IpHelper;
6		use Yiisoft\Validator\DataSetInterface;
7		use Yiisoft\Validator\Result;
8		use Yiisoft\Validator\Rule;
9
10		/**
11		* The validator checks if the attribute value is a valid IPv4/IPv6 address or subnet.
12		*
13		* It also may change attribute's value if normalization of IPv6 expansion is enabled.
14		*
15		* The following are examples of validation rules using this validator:
16		*
17		* ```php
18		* ['ip_address', 'ip'], // IPv4 or IPv6 address
19		* ['ip_address', 'ip', 'ipv6' => false], // IPv4 address (IPv6 is disabled)
20		* ['ip_address', 'ip', 'subnet' => true], // requires a CIDR prefix (like 10.0.0.1/24) for the IP address
21		* ['ip_address', 'ip', 'subnet' => null], // CIDR prefix is optional
22		* ['ip_address', 'ip', 'subnet' => null, 'normalize' => true], // CIDR prefix is optional and will be added when missing
23		* ['ip_address', 'ip', 'ranges' => ['192.168.0.0/24']], // only IP addresses from the specified subnet are allowed
24		* ['ip_address', 'ip', 'ranges' => ['!192.168.0.0/24', 'any']], // any IP is allowed except IP in the specified subnet
25		* ['ip_address', 'ip', 'expandIPv6' => true], // expands IPv6 address to a full notation format
26		* ```
27		*
28		* @property array $ranges The IPv4 or IPv6 ranges that are allowed or forbidden. See [[setRanges()]] for
29		* detailed description.
30		*/
31		class Ip extends Rule
32		{
33		/**
34		* Negation char.
35		*
36		* Used to negate [[ranges]] or [[networks]] or to negate validating value when [[negation]] is set to `true`.
37		*
38		* @see allowNegation
39		* @see networks
40		* @see ranges
41		*/
42		private const NEGATION_CHAR = '!';
43
44		/**
45		* @var array The network aliases, that can be used in [[ranges]].
46		* - key - alias name
47		* - value - array of strings. String can be an IP range, IP address or another alias. String can be
48		* negated with [[NEGATION_CHAR]] (independent of `negation` option).
49		*
50		* The following aliases are defined by default:
51		* - `*`: `any`
52		* - `any`: `0.0.0.0/0, ::/0`
53		* - `private`: `10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, fd00::/8`
54		* - `multicast`: `224.0.0.0/4, ff00::/8`
55		* - `linklocal`: `169.254.0.0/16, fe80::/10`
56		* - `localhost`: `127.0.0.0/8', ::1`
57		* - `documentation`: `192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24, 2001:db8::/32`
58		* - `system`: `multicast, linklocal, localhost, documentation`
59		*/
60		private array $networks = [
61		'*' => ['any'],
62		'any' => ['0.0.0.0/0', '::/0'],
63		'private' => ['10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16', 'fd00::/8'],
64		'multicast' => ['224.0.0.0/4', 'ff00::/8'],
65		'linklocal' => ['169.254.0.0/16', 'fe80::/10'],
66		'localhost' => ['127.0.0.0/8', '::1'],
67		'documentation' => ['192.0.2.0/24', '198.51.100.0/24', '203.0.113.0/24', '2001:db8::/32'],
68		'system' => ['multicast', 'linklocal', 'localhost', 'documentation'],
69		];
70		/**
71		* @var bool whether the validating value can be an IPv6 address. Defaults to `true`.
72		*/
73		private bool $allowIpv6 = true;
74		/**
75		* @var bool whether the validating value can be an IPv4 address. Defaults to `true`.
76		*/
77		private bool $allowIpv4 = true;
78		/**
79		* @var bool whether the address can be an IP with CIDR subnet, like `192.168.10.0/24`.
80		* The following values are possible:
81		*
82		* - `false` - the address must not have a subnet (default).
83		* - `true` - specifying a subnet is optional.
84		*/
85		private bool $allowSubnet = false;
86		/**
87		* @var bool
88		*/
89		private bool $requireSubnet = false;
90		/**
91		* @var bool whether address may have a [[NEGATION_CHAR]] character at the beginning.
92		* Defaults to `false`.
93		*/
94		private bool $allowNegation = false;
95
96		/**
97		* @var string user-defined error message is used when validation fails due to the wrong IP address format.
98		*
99		* You may use the following placeholders in the message:
100		*
101		* - `{attribute}`: the label of the attribute being validated
102		* - `{value}`: the value of the attribute being validated
103		*/
104		private string $message = 'Must be a valid IP address.';
105		/**
106		* @var string user-defined error message is used when validation fails due to the disabled IPv6 validation.
107		*
108		* You may use the following placeholders in the message:
109		*
110		* - `{attribute}`: the label of the attribute being validated
111		* - `{value}`: the value of the attribute being validated
112		*
113		* @see allowIpv6
114		*/
115		private string $ipv6NotAllowed = 'Must not be an IPv6 address.';
116		/**
117		* @var string user-defined error message is used when validation fails due to the disabled IPv4 validation.
118		*
119		* You may use the following placeholders in the message:
120		*
121		* - `{attribute}`: the label of the attribute being validated
122		* - `{value}`: the value of the attribute being validated
123		*
124		* @see allowIpv4
125		*/
126		private string $ipv4NotAllowed = 'Must not be an IPv4 address.';
127		/**
128		* @var string user-defined error message is used when validation fails due to the wrong CIDR.
129		*
130		* You may use the following placeholders in the message:
131		*
132		* - `{attribute}`: the label of the attribute being validated
133		* - `{value}`: the value of the attribute being validated
134		* @see allowSubnet
135		*/
136		private string $wrongCidr = 'Contains wrong subnet mask.';
137		/**
138		* @var string user-defined error message is used when validation fails due to subnet [[subnet]] set to 'only',
139		* but the CIDR prefix is not set.
140		*
141		* You may use the following placeholders in the message:
142		*
143		* - `{attribute}`: the label of the attribute being validated
144		* - `{value}`: the value of the attribute being validated
145		*
146		* @see allowSubnet
147		*/
148		private string $noSubnet = 'Must be an IP address with specified subnet.';
149		/**
150		* @var string user-defined error message is used when validation fails
151		* due to [[subnet]] is false, but CIDR prefix is present.
152		*
153		* You may use the following placeholders in the message:
154		*
155		* - `{attribute}`: the label of the attribute being validated
156		* - `{value}`: the value of the attribute being validated
157		*
158		* @see allowSubnet
159		*/
160		private string $hasSubnet = 'Must not be a subnet.';
161		/**
162		* @var string user-defined error message is used when validation fails due to IP address
163		* is not not allowed by [[ranges]] check.
164		*
165		* You may use the following placeholders in the message:
166		*
167		* - `{attribute}`: the label of the attribute being validated
168		* - `{value}`: the value of the attribute being validated
169		*
170		* @see ranges
171		*/
172		private string $notInRange = 'Is not in the allowed range.';
173
174		/**
175		* @var array
176		*/
177		private array $ranges = [];
178
179		/**
180		* Set the IPv4 or IPv6 ranges that are allowed or forbidden.
181		*
182		* The following preparation tasks are performed:
183		*
184		* - Recursively substitutes aliases (described in [[networks]]) with their values.
185		* - Removes duplicates
186		*
187		* @param array $ranges the IPv4 or IPv6 ranges that are allowed or forbidden.
188		*
189		* When the array is empty, or the option not set, all IP addresses are allowed.
190		*
191		* Otherwise, the rules are checked sequentially until the first match is found.
192		* An IP address is forbidden, when it has not matched any of the rules.
193		*
194		* Example:
195		*
196		* ```php
197		* (new Ip())->ranges([
198		* '192.168.10.128'
199		* '!192.168.10.0/24',
200		* 'any' // allows any other IP addresses
201		* ]);
202		* ```
203		*
204		* In this example, access is allowed for all the IPv4 and IPv6 addresses excluding the `192.168.10.0/24` subnet.
205		* IPv4 address `192.168.10.128` is also allowed, because it is listed before the restriction.
206		*/
207	8	public function ranges(array $ranges): self
208		{
209	8	$this->ranges = $this->prepareRanges($ranges);
210	8	return $this;
211		}
212
213	5	public function getRanges(): array
214		{
215	5	return $this->ranges;
216		}
217
218	2	public function allowIpv4(): self
219		{
220	2	$this->allowIpv4 = true;
221	2	return $this;
222		}
223
224	4	public function disallowIpv4(): self
225		{
226	4	$this->allowIpv4 = false;
227	4	return $this;
228		}
229
230	2	public function allowIpv6(): self
231		{
232	2	$this->allowIpv6 = true;
233	2	return $this;
234		}
235
236	2	public function disallowIpv6(): self
237		{
238	2	$this->allowIpv6 = false;
239	2	return $this;
240		}
241
242	3	public function allowNegation(): self
243		{
244	3	$this->allowNegation = true;
245	3	return $this;
246		}
247
248		public function disallowNegation(): self
249		{
250		$this->allowNegation = false;
251		return $this;
252		}
253
254	5	public function allowSubnet(): self
255		{
256	5	$this->allowSubnet = true;
257	5	$this->requireSubnet = false;
258	5	return $this;
259		}
260
261	3	public function requireSubnet(): self
262		{
263	3	$this->allowSubnet = true;
264	3	$this->requireSubnet = true;
265	3	return $this;
266		}
267
268		public function disallowSubnet(): self
269		{
270		$this->allowSubnet = false;
271		$this->requireSubnet = false;
272		return $this;
273		}
274
275	15	protected function validateValue($value, DataSetInterface $dataSet = null): Result
276		{
277	15	if (!$this->allowIpv4 && !$this->allowIpv6) {
278	1	throw new \RuntimeException('Both IPv4 and IPv6 checks can not be disabled at the same time');
279		}
280	14	$result = new Result();
281	14	if (!is_string($value)) {
282	4	$result->addError($this->formatMessage($this->message));
283	4	return $result;
284		}
285
286	10	if (preg_match($this->getIpParsePattern(), $value, $matches) === 0) {
287	6	$result->addError($this->formatMessage($this->message));
288	6	return $result;
289		}
290	7	$negation = !empty($matches['not'] ?? null);
291	7	$ip = $matches['ip'];
292	7	$cidr = $matches['cidr'] ?? null;
293	7	$ipCidr = $matches['ipCidr'];
294
295		try {
296	7	$ipVersion = IpHelper::getIpVersion($ip, false);
297		} catch (\InvalidArgumentException $e) {
298		$result->addError($this->formatMessage($this->message));
299		return $result;
300		}
301
302	7	if ($this->requireSubnet === true && $cidr === null) {
303	3	$result->addError($this->formatMessage($this->noSubnet));
304	3	return $result;
305		}
306	7	if ($this->allowSubnet === false && $cidr !== null) {
307	3	$result->addError($this->formatMessage($this->hasSubnet));
308	3	return $result;
309		}
310	7	if ($this->allowNegation === false && $negation) {
311	3	$result->addError($this->formatMessage($this->message));
312	3	return $result;
313		}
314	7	if ($ipVersion === IpHelper::IPV6 && !$this->allowIpv6) {
315	1	$result->addError($this->formatMessage($this->ipv6NotAllowed));
316	1	return $result;
317		}
318	7	if ($ipVersion === IpHelper::IPV4 && !$this->allowIpv4) {
319	2	$result->addError($this->formatMessage($this->ipv4NotAllowed));
320	2	return $result;
321		}
322	7	if (!$result->isValid()) {
323		return $result;
324		}
325	7	if ($cidr !== null) {
326		try {
327	5	$cidr = IpHelper::getCidrBits($ipCidr);
		0 ignored issues – show Unused Code introduced 2019-11-01 07:42 UTC by Report Bug Copy Issue Report The assignment to `$cidr` is dead and can be removed. Loading history...
328	2	} catch (\InvalidArgumentException $e) {
329	2	$result->addError($this->formatMessage($this->wrongCidr));
330	2	return $result;
331		}
332		}
333	7	if (!$this->isAllowed($ipCidr)) {
334	4	$result->addError($this->formatMessage($this->notInRange));
335	4	return $result;
336		}
337
338	7	return $result;
339		}
340
341		/**
342		* The method checks whether the IP address with specified CIDR is allowed according to the [[ranges]] list.
343		*
344		* @see ranges
345		*/
346	7	private function isAllowed(string $ip): bool
347		{
348	7	if (empty($this->ranges)) {
349	3	return true;
350		}
351
352	4	foreach ($this->ranges as $string) {
353	4	[$isNegated, $range] = $this->parseNegatedRange($string);
354	4	if (IpHelper::inRange($ip, $range)) {
355	4	return !$isNegated;
356		}
357		}
358
359	3	return false;
360		}
361
362		/**
363		* Parses IP address/range for the negation with [[NEGATION_CHAR]].
364		*
365		* @param $string
366		* @return array `[0 => bool, 1 => string]`
367		* - boolean: whether the string is negated
368		* - string: the string without negation (when the negation were present)
369		*/
370	8	private function parseNegatedRange($string): array
371		{
372	8	$isNegated = strpos($string, static::NEGATION_CHAR) === 0;
373	8	return [$isNegated, $isNegated ? substr($string, strlen(static::NEGATION_CHAR)) : $string];
374		}
375
376		/**
377		* Prepares array to fill in [[ranges]].
378		*
379		* - Recursively substitutes aliases, described in [[networks]] with their values,
380		* - Removes duplicates.
381		*
382		* @param array $ranges
383		* @return array
384		* @see networks
385		*/
386	8	private function prepareRanges(array $ranges): array
387		{
388	8	$result = [];
389	8	foreach ($ranges as $string) {
390	8	[$isRangeNegated, $range] = $this->parseNegatedRange($string);
391	8	if (isset($this->networks[$range])) {
392	6	$replacements = $this->prepareRanges($this->networks[$range]);
393	6	foreach ($replacements as &$replacement) {
394	6	[$isReplacementNegated, $replacement] = $this->parseNegatedRange($replacement);
395	6	$result[] = ($isRangeNegated && !$isReplacementNegated ? static::NEGATION_CHAR : '') . $replacement;
396		}
397		} else {
398	8	$result[] = $string;
399		}
400		}
401
402	8	return array_unique($result);
403		}
404
405		/**
406		* Used to get the Regexp pattern for initial IP address parsing.
407		* @return string
408		*/
409	10	public function getIpParsePattern(): string
410		{
411	10	return '/^(?<not>' . preg_quote(static::NEGATION_CHAR, '/') . ')?(?<ipCidr>(?<ip>(?:' . IpHelper::IPV4_PATTERN . ')\|(?:' . IpHelper::IPV6_PATTERN . '))(?:\/(?<cidr>-?\d+))?)$/';
412		}
413		}
414

yiisoft / validator

Pull Request — master (#41)

Ip::isAllowed() A

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