EmailValidator::idnToAscii() - Code Metrics - Inspection of "Fix #18734: Added `yii\validators\EmailValidator::..." - yiisoft/yii2 - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( 9d5617...725057 )

by Alexander

created 2021-07-05 22:55 UTC

EmailValidator::idnToAscii() A

↳ Parent: EmailValidator

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	6

Importance

Changes

Metric	Value
cc	2
eloc	3
c	0
b	0
f	0
nc	2
nop	1
dl	0
loc	8
ccs	0
cts	4
cp	0
crap	6
rs	10

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\validators;

use Yii;
use yii\base\ErrorException;
use yii\base\InvalidConfigException;
use yii\helpers\Json;
use yii\web\JsExpression;

/**
 * EmailValidator validates that the attribute value is a valid email address.
 *
 * @author Qiang Xue <[email protected]>
 * @since 2.0
 */
class EmailValidator extends Validator
{
    /**
     * @var string the regular expression used to validate the attribute value.
     * @see http://www.regular-expressions.info/email.html
     */
    public $pattern = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$/';
    /**
     * @var string the regular expression used to validate email addresses with the name part.
     * This property is used only when [[allowName]] is true.
     * @see allowName
     */
    public $fullPattern = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?>$/';
    /**
     * @var string the regular expression used to validate the part before the @ symbol, used if ASCII conversion fails to validate the address.
     * @see http://www.regular-expressions.info/email.html
     * @since 2.0.42
     */
    public $patternASCII = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*$/';
    /**
     * @var string the regular expression used to validate email addresses with the name part before the @ symbol, used if ASCII conversion fails to validate the address.
     * This property is used only when [[allowName]] is true.
     * @see allowName
     * @since 2.0.42
     */
    public $fullPatternASCII = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*$/';
    /**
     * @var bool whether to allow name in the email address (e.g. "John Smith <[email protected]>"). Defaults to false.
     * @see fullPattern
     */
    public $allowName = false;
    /**
     * @var bool whether to check whether the email's domain exists and has either an A or MX record.
     * Be aware that this check can fail due to temporary DNS problems even if the email address is
     * valid and an email would be deliverable. Defaults to false.
     */
    public $checkDNS = false;
    /**
     * @var bool whether validation process should take into account IDN (internationalized domain
     * names). Defaults to false meaning that validation of emails containing IDN will always fail.
     * Note that in order to use IDN validation you have to install and enable `intl` PHP extension,
     * otherwise an exception would be thrown.
     */
    public $enableIDN = false;
    /**
     * @var bool whether [[enableIDN]] should apply to the local part of the email (left side
     * of the `@`). Only applies if [[enableIDN]] is `true`.
     * @since 2.0.43
     */
    public $enableLocalIDN = true;


    /**
     * {@inheritdoc}
     */
    public function init()
    {
        parent::init();
        if ($this->enableIDN && !function_exists('idn_to_ascii')) {
            throw new InvalidConfigException('In order to use IDN validation intl extension must be installed and enabled.');
        }
        if ($this->message === null) {
            $this->message = Yii::t('yii', '{attribute} is not a valid email address.');
        }
    }

    /**
     * {@inheritdoc}
     */
    protected function validateValue($value)
    {
        if (!is_string($value)) {
            $valid = false;
        } elseif (!preg_match('/^(?P<name>(?:"?([^"]*)"?\s)?)(?:\s+)?(?:(?P<open><?)((?P<local>.+)@(?P<domain>[^>]+))(?P<close>>?))$/i', $value, $matches)) {
            $valid = false;
        } else {
            if ($this->enableIDN) {
                if ($this->enableLocalIDN) {
                    $matches['local'] = $this->idnToAsciiWithFallback($matches['local']);
                }
                $matches['domain'] = $this->idnToAscii($matches['domain']);
                $value = $matches['name'] . $matches['open'] . $matches['local'] . '@' . $matches['domain'] . $matches['close'];
            }

            if (strlen($matches['local']) > 64) {
                // The maximum total length of a user name or other local-part is 64 octets. RFC 5322 section 4.5.3.1.1
                // http://tools.ietf.org/html/rfc5321#section-4.5.3.1.1
                $valid = false;
            } elseif (strlen($matches['local'] . '@' . $matches['domain']) > 254) {
                // There is a restriction in RFC 2821 on the length of an address in MAIL and RCPT commands
                // of 254 characters. Since addresses that do not fit in those fields are not normally useful, the
                // upper limit on address lengths should normally be considered to be 254.
                //
                // Dominic Sayers, RFC 3696 erratum 1690
                // http://www.rfc-editor.org/errata_search.php?eid=1690
                $valid = false;
            } else {
                $valid = preg_match($this->pattern, $value) || ($this->allowName && preg_match($this->fullPattern, $value));
                if ($valid && $this->checkDNS) {
                    $valid = $this->isDNSValid($matches['domain']);
                }
            }
        }

        return $valid ? null : [$this->message, []];
    }

    /**
     * @param string $domain
     * @return bool if DNS records for domain are valid
     * @see https://github.com/yiisoft/yii2/issues/17083
     */
    protected function isDNSValid($domain)
    {
        return $this->hasDNSRecord($domain, true) || $this->hasDNSRecord($domain, false);
    }

    private function hasDNSRecord($domain, $isMX)
    {
        $normalizedDomain = $domain . '.';
        if (!checkdnsrr($normalizedDomain, ($isMX ? 'MX' : 'A'))) {
            return false;
        }

        try {
            // dns_get_record can return false and emit Warning that may or may not be converted to ErrorException
            $records = dns_get_record($normalizedDomain, ($isMX ? DNS_MX : DNS_A));
        } catch (ErrorException $exception) {
            return false;
        }

        return !empty($records);
    }

    private function idnToAscii($idn)
    {
        if (PHP_VERSION_ID < 50600) {
            // TODO: drop old PHP versions support
            return idn_to_ascii($idn);
        }

        return idn_to_ascii($idn, IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46);
    }

    /**
     * {@inheritdoc}
     */
    public function clientValidateAttribute($model, $attribute, $view)
    {
        ValidationAsset::register($view);
        if ($this->enableIDN) {
            PunycodeAsset::register($view);
        }
        $options = $this->getClientOptions($model, $attribute);

        return 'yii.validation.email(value, messages, ' . Json::htmlEncode($options) . ');';
    }

    /**
     * {@inheritdoc}
     */
    public function getClientOptions($model, $attribute)
    {
        $options = [
            'pattern' => new JsExpression($this->pattern),
            'fullPattern' => new JsExpression($this->fullPattern),
            'allowName' => $this->allowName,
            'message' => $this->formatMessage($this->message, [
                'attribute' => $model->getAttributeLabel($attribute),
            ]),
            'enableIDN' => (bool) $this->enableIDN,
        ];
        if ($this->skipOnEmpty) {
            $options['skipOnEmpty'] = 1;
        }

        return $options;
    }

    /**
     * @param string $value
     * @return string|bool returns string if it is valid and/or can be converted, bool false if it can't be converted and/or is invalid
     * @see https://github.com/yiisoft/yii2/issues/18585
     */
    private function idnToAsciiWithFallback($value)
    {
        $ascii = $this->idnToAscii($value);
        if ($ascii === false) {
            if (preg_match($this->patternASCII, $value) || ($this->allowName && preg_match($this->fullPatternASCII, $value))) {
                return $value;
            }
        }

        return $ascii;
    }
}


1		<?php
2		/**
3		* @link http://www.yiiframework.com/
4		* @copyright Copyright (c) 2008 Yii Software LLC
5		* @license http://www.yiiframework.com/license/
6		*/
7
8		namespace yii\validators;
9
10		use Yii;
11		use yii\base\ErrorException;
12		use yii\base\InvalidConfigException;
13		use yii\helpers\Json;
14		use yii\web\JsExpression;
15
16		/**
17		* EmailValidator validates that the attribute value is a valid email address.
18		*
19		* @author Qiang Xue <[email protected]>
20		* @since 2.0
21		*/
22		class EmailValidator extends Validator
23		{
24		/**
25		* @var string the regular expression used to validate the attribute value.
26		* @see http://www.regular-expressions.info/email.html
27		*/
28		public $pattern = '/^[a-zA-Z0-9!#$%&\'+\\/=?^_`{\|}~-]+(?:\.[a-zA-Z0-9!#$%&\'+\\/=?^_`{\|}~-]+)@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-][a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$/';
29		/**
30		* @var string the regular expression used to validate email addresses with the name part.
31		* This property is used only when [[allowName]] is true.
32		* @see allowName
33		*/
34		public $fullPattern = '/^[^@]<[a-zA-Z0-9!#$%&\'+\\/=?^_`{\|}~-]+(?:\.[a-zA-Z0-9!#$%&\'+\\/=?^_`{\|}~-]+)@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-][a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-][a-zA-Z0-9])?>$/';
35		/**
36		* @var string the regular expression used to validate the part before the @ symbol, used if ASCII conversion fails to validate the address.
37		* @see http://www.regular-expressions.info/email.html
38		* @since 2.0.42
39		*/
40		public $patternASCII = '/^[a-zA-Z0-9!#$%&\'+\\/=?^_`{\|}~-]+(?:\.[a-zA-Z0-9!#$%&\'+\\/=?^_`{\|}~-]+)*$/';
41		/**
42		* @var string the regular expression used to validate email addresses with the name part before the @ symbol, used if ASCII conversion fails to validate the address.
43		* This property is used only when [[allowName]] is true.
44		* @see allowName
45		* @since 2.0.42
46		*/
47		public $fullPatternASCII = '/^[^@]<[a-zA-Z0-9!#$%&\'+\\/=?^_`{\|}~-]+(?:\.[a-zA-Z0-9!#$%&\'+\\/=?^_`{\|}~-]+)$/';
48		/**
49		* @var bool whether to allow name in the email address (e.g. "John Smith <[email protected]>"). Defaults to false.
50		* @see fullPattern
51		*/
52		public $allowName = false;
53		/**
54		* @var bool whether to check whether the email's domain exists and has either an A or MX record.
55		* Be aware that this check can fail due to temporary DNS problems even if the email address is
56		* valid and an email would be deliverable. Defaults to false.
57		*/
58		public $checkDNS = false;
59		/**
60		* @var bool whether validation process should take into account IDN (internationalized domain
61		* names). Defaults to false meaning that validation of emails containing IDN will always fail.
62		* Note that in order to use IDN validation you have to install and enable `intl` PHP extension,
63		* otherwise an exception would be thrown.
64		*/
65		public $enableIDN = false;
66		/**
67		* @var bool whether [[enableIDN]] should apply to the local part of the email (left side
68		* of the `@`). Only applies if [[enableIDN]] is `true`.
69		* @since 2.0.43
70		*/
71	42	public $enableLocalIDN = true;
72
73	42
74	42	/**
75		* {@inheritdoc}
76		*/
77	42	public function init()
78	42	{
79		parent::init();
80	42	if ($this->enableIDN && !function_exists('idn_to_ascii')) {
81		throw new InvalidConfigException('In order to use IDN validation intl extension must be installed and enabled.');
82		}
83		if ($this->message === null) {
84		$this->message = Yii::t('yii', '{attribute} is not a valid email address.');
85	41	}
86		}
87	41
88	1	/**
89	41	* {@inheritdoc}
90	4	*/
91		protected function validateValue($value)
92	39	{
93	18	if (!is_string($value)) {
94	18	$valid = false;
95	18	} elseif (!preg_match('/^(?P<name>(?:"?([^"]*)"?\s)?)(?:\s+)?(?:(?P<open><?)((?P<local>.+)@(?P<domain>[^>]+))(?P<close>>?))$/i', $value, $matches)) {
96		$valid = false;
97		} else {
98	39	if ($this->enableIDN) {
99		if ($this->enableLocalIDN) {
100		$matches['local'] = $this->idnToAsciiWithFallback($matches['local']);
101	1	}
102	39	$matches['domain'] = $this->idnToAscii($matches['domain']);
103		$value = $matches['name'] . $matches['open'] . $matches['local'] . '@' . $matches['domain'] . $matches['close'];
104		}
105
106		if (strlen($matches['local']) > 64) {
107		// The maximum total length of a user name or other local-part is 64 octets. RFC 5322 section 4.5.3.1.1
108		// http://tools.ietf.org/html/rfc5321#section-4.5.3.1.1
109	1	$valid = false;
110		} elseif (strlen($matches['local'] . '@' . $matches['domain']) > 254) {
111	39	// There is a restriction in RFC 2821 on the length of an address in MAIL and RCPT commands
112	39	// of 254 characters. Since addresses that do not fit in those fields are not normally useful, the
113	1	// upper limit on address lengths should normally be considered to be 254.
114		//
115		// Dominic Sayers, RFC 3696 erratum 1690
116		// http://www.rfc-editor.org/errata_search.php?eid=1690
117		$valid = false;
118	41	} else {
119		$valid = preg_match($this->pattern, $value) \|\| ($this->allowName && preg_match($this->fullPattern, $value));
120		if ($valid && $this->checkDNS) {
121		$valid = $this->isDNSValid($matches['domain']);
122		}
123		}
124		}
125
126	1	return $valid ? null : [$this->message, []];
127		}
128	1
129		/**
130		* @param string $domain
131	1	* @return bool if DNS records for domain are valid
132		* @see https://github.com/yiisoft/yii2/issues/17083
133	1	*/
134	1	protected function isDNSValid($domain)
135	1	{
136		return $this->hasDNSRecord($domain, true) \|\| $this->hasDNSRecord($domain, false);
137		}
138
139		private function hasDNSRecord($domain, $isMX)
140	1	{
141		$normalizedDomain = $domain . '.';
142		if (!checkdnsrr($normalizedDomain, ($isMX ? 'MX' : 'A'))) {
143		return false;
144		}
145	1
146		try {
147		// dns_get_record can return false and emit Warning that may or may not be converted to ErrorException
148	18	$records = dns_get_record($normalizedDomain, ($isMX ? DNS_MX : DNS_A));
149		} catch (ErrorException $exception) {
150	18	return false;
151		}
152
153		return !empty($records);
154		}
155	18
156		private function idnToAscii($idn)
157		{
158		if (PHP_VERSION_ID < 50600) {
159		// TODO: drop old PHP versions support
160		return idn_to_ascii($idn);
161		}
162
163		return idn_to_ascii($idn, IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46);
164		}
165
166		/**
167		* {@inheritdoc}
168		*/
169		public function clientValidateAttribute($model, $attribute, $view)
170		{
171		ValidationAsset::register($view);
172		if ($this->enableIDN) {
173		PunycodeAsset::register($view);
174		}
175		$options = $this->getClientOptions($model, $attribute);
176
177		return 'yii.validation.email(value, messages, ' . Json::htmlEncode($options) . ');';
178		}
179
180		/**
181		* {@inheritdoc}
182		*/
183		public function getClientOptions($model, $attribute)
184		{
185		$options = [
186		'pattern' => new JsExpression($this->pattern),
187		'fullPattern' => new JsExpression($this->fullPattern),
188		'allowName' => $this->allowName,
189		'message' => $this->formatMessage($this->message, [
190		'attribute' => $model->getAttributeLabel($attribute),
191		]),
192		'enableIDN' => (bool) $this->enableIDN,
193		];
194		if ($this->skipOnEmpty) {
195		$options['skipOnEmpty'] = 1;
196		}
197
198	18	return $options;
199		}
200	18
201	18	/**
202	11	* @param string $value
203	6	* @return string\|bool returns string if it is valid and/or can be converted, bool false if it can't be converted and/or is invalid
204		* @see https://github.com/yiisoft/yii2/issues/18585
205		*/
206		private function idnToAsciiWithFallback($value)
207	13	{
208		$ascii = $this->idnToAscii($value);
209		if ($ascii === false) {
210		if (preg_match($this->patternASCII, $value) \|\| ($this->allowName && preg_match($this->fullPatternASCII, $value))) {
211		return $value;
212		}
213		}
214
215		return $ascii;
216		}
217		}
218

yiisoft / yii2

Push — master ( 9d5617...725057 )

EmailValidator::idnToAscii() A

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