/usr/share/php/Symfony/Component/Validator/Constraints/EmailValidator.php is in php-symfony-validator 2.7.10-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Validator\Constraints;
use Symfony\Component\Validator\Context\ExecutionContextInterface;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\RuntimeException;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
/**
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class EmailValidator extends ConstraintValidator
{
/**
* @var bool
*/
private $isStrict;
public function __construct($strict = false)
{
$this->isStrict = $strict;
}
/**
* {@inheritdoc}
*/
public function validate($value, Constraint $constraint)
{
if (!$constraint instanceof Email) {
throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Email');
}
if (null === $value || '' === $value) {
return;
}
if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
throw new UnexpectedTypeException($value, 'string');
}
$value = (string) $value;
if (null === $constraint->strict) {
$constraint->strict = $this->isStrict;
}
if ($constraint->strict) {
if (!class_exists('\Egulias\EmailValidator\EmailValidator')) {
throw new RuntimeException('Strict email validation requires egulias/email-validator');
}
$strictValidator = new \Egulias\EmailValidator\EmailValidator();
if (!$strictValidator->isValid($value, false, true)) {
if ($this->context instanceof ExecutionContextInterface) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::INVALID_FORMAT_ERROR)
->addViolation();
} else {
$this->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::INVALID_FORMAT_ERROR)
->addViolation();
}
return;
}
} elseif (!preg_match('/^.+\@\S+\.\S+$/', $value)) {
if ($this->context instanceof ExecutionContextInterface) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::INVALID_FORMAT_ERROR)
->addViolation();
} else {
$this->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::INVALID_FORMAT_ERROR)
->addViolation();
}
return;
}
$host = substr($value, strpos($value, '@') + 1);
// Check for host DNS resource records
if ($constraint->checkMX) {
if (!$this->checkMX($host)) {
if ($this->context instanceof ExecutionContextInterface) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::MX_CHECK_FAILED_ERROR)
->addViolation();
} else {
$this->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::MX_CHECK_FAILED_ERROR)
->addViolation();
}
}
return;
}
if ($constraint->checkHost && !$this->checkHost($host)) {
if ($this->context instanceof ExecutionContextInterface) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::HOST_CHECK_FAILED_ERROR)
->addViolation();
} else {
$this->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::HOST_CHECK_FAILED_ERROR)
->addViolation();
}
}
}
/**
* Check DNS Records for MX type.
*
* @param string $host Host
*
* @return bool
*/
private function checkMX($host)
{
return checkdnsrr($host, 'MX');
}
/**
* Check if one of MX, A or AAAA DNS RR exists.
*
* @param string $host Host
*
* @return bool
*/
private function checkHost($host)
{
return $this->checkMX($host) || (checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA'));
}
}
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