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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Validator;
use UConverter;
class EmailAddress extends AbstractValidator
{
const INVALID = 'emailAddressInvalid';
const INVALID_FORMAT = 'emailAddressInvalidFormat';
const INVALID_HOSTNAME = 'emailAddressInvalidHostname';
const INVALID_MX_RECORD = 'emailAddressInvalidMxRecord';
const INVALID_SEGMENT = 'emailAddressInvalidSegment';
const DOT_ATOM = 'emailAddressDotAtom';
const QUOTED_STRING = 'emailAddressQuotedString';
const INVALID_LOCAL_PART = 'emailAddressInvalidLocalPart';
const LENGTH_EXCEEDED = 'emailAddressLengthExceeded';
// @codingStandardsIgnoreStart
/**
* @var array
*/
protected $messageTemplates = [
self::INVALID => "Invalid type given. String expected",
self::INVALID_FORMAT => "The input is not a valid email address. Use the basic format local-part@hostname",
self::INVALID_HOSTNAME => "'%hostname%' is not a valid hostname for the email address",
self::INVALID_MX_RECORD => "'%hostname%' does not appear to have any valid MX or A records for the email address",
self::INVALID_SEGMENT => "'%hostname%' is not in a routable network segment. The email address should not be resolved from public network",
self::DOT_ATOM => "'%localPart%' can not be matched against dot-atom format",
self::QUOTED_STRING => "'%localPart%' can not be matched against quoted-string format",
self::INVALID_LOCAL_PART => "'%localPart%' is not a valid local part for the email address",
self::LENGTH_EXCEEDED => "The input exceeds the allowed length",
];
// @codingStandardsIgnoreEnd
/**
* @var array
*/
protected $messageVariables = [
'hostname' => 'hostname',
'localPart' => 'localPart'
];
/**
* @var string
*/
protected $hostname;
/**
* @var string
*/
protected $localPart;
/**
* Returns the found mx record informations
*
* @var array
*/
protected $mxRecord = [];
/**
* Internal options array
*/
protected $options = [
'useMxCheck' => false,
'useDeepMxCheck' => false,
'useDomainCheck' => true,
'allow' => Hostname::ALLOW_DNS,
'strict' => true,
'hostnameValidator' => null,
];
/**
* Instantiates hostname validator for local use
*
* The following additional option keys are supported:
* 'hostnameValidator' => A hostname validator, see Zend\Validator\Hostname
* 'allow' => Options for the hostname validator, see Zend\Validator\Hostname::ALLOW_*
* 'strict' => Whether to adhere to strictest requirements in the spec
* 'useMxCheck' => If MX check should be enabled, boolean
* 'useDeepMxCheck' => If a deep MX check should be done, boolean
*
* @param array|\Traversable $options OPTIONAL
*/
public function __construct($options = [])
{
if (! is_array($options)) {
$options = func_get_args();
$temp['allow'] = array_shift($options);
if (! empty($options)) {
$temp['useMxCheck'] = array_shift($options);
}
if (! empty($options)) {
$temp['hostnameValidator'] = array_shift($options);
}
$options = $temp;
}
parent::__construct($options);
}
/**
* Sets the validation failure message template for a particular key
* Adds the ability to set messages to the attached hostname validator
*
* @param string $messageString
* @param string $messageKey OPTIONAL
* @return AbstractValidator Provides a fluent interface
*/
public function setMessage($messageString, $messageKey = null)
{
if ($messageKey === null) {
$this->getHostnameValidator()->setMessage($messageString);
parent::setMessage($messageString);
return $this;
}
if (! isset($this->messageTemplates[$messageKey])) {
$this->getHostnameValidator()->setMessage($messageString, $messageKey);
} else {
parent::setMessage($messageString, $messageKey);
}
return $this;
}
/**
* Returns the set hostname validator
*
* If was not previously set then lazy load a new one
*
* @return Hostname
*/
public function getHostnameValidator()
{
if (! isset($this->options['hostnameValidator'])) {
$this->options['hostnameValidator'] = new Hostname($this->getAllow());
}
return $this->options['hostnameValidator'];
}
/**
* @param Hostname $hostnameValidator OPTIONAL
* @return EmailAddress Provides a fluent interface
*/
public function setHostnameValidator(Hostname $hostnameValidator = null)
{
$this->options['hostnameValidator'] = $hostnameValidator;
return $this;
}
/**
* Returns the allow option of the attached hostname validator
*
* @return int
*/
public function getAllow()
{
return $this->options['allow'];
}
/**
* Sets the allow option of the hostname validator to use
*
* @param int $allow
* @return EmailAddress Provides a fluent interface
*/
public function setAllow($allow)
{
$this->options['allow'] = $allow;
if (isset($this->options['hostnameValidator'])) {
$this->options['hostnameValidator']->setAllow($allow);
}
return $this;
}
/**
* Whether MX checking via getmxrr is supported or not
*
* @return bool
*/
public function isMxSupported()
{
return function_exists('getmxrr');
}
/**
* Returns the set validateMx option
*
* @return bool
*/
public function getMxCheck()
{
return $this->options['useMxCheck'];
}
/**
* Set whether we check for a valid MX record via DNS
*
* This only applies when DNS hostnames are validated
*
* @param bool $mx Set allowed to true to validate for MX records, and false to not validate them
* @return EmailAddress Fluid Interface
*/
public function useMxCheck($mx)
{
$this->options['useMxCheck'] = (bool) $mx;
return $this;
}
/**
* Returns the set deepMxCheck option
*
* @return bool
*/
public function getDeepMxCheck()
{
return $this->options['useDeepMxCheck'];
}
/**
* Use deep validation for MX records
*
* @param bool $deep Set deep to true to perform a deep validation process for MX records
* @return EmailAddress Fluid Interface
*/
public function useDeepMxCheck($deep)
{
$this->options['useDeepMxCheck'] = (bool) $deep;
return $this;
}
/**
* Returns the set domainCheck option
*
* @return bool
*/
public function getDomainCheck()
{
return $this->options['useDomainCheck'];
}
/**
* Sets if the domain should also be checked
* or only the local part of the email address
*
* @param bool $domain
* @return EmailAddress Fluid Interface
*/
public function useDomainCheck($domain = true)
{
$this->options['useDomainCheck'] = (bool) $domain;
return $this;
}
/**
* Returns if the given host is reserved
*
* The following addresses are seen as reserved
* '0.0.0.0/8', '10.0.0.0/8', '127.0.0.0/8'
* '100.64.0.0/10'
* '172.16.0.0/12'
* '198.18.0.0/15'
* '169.254.0.0/16', '192.168.0.0/16'
* '192.0.2.0/24', '192.88.99.0/24', '198.51.100.0/24', '203.0.113.0/24'
* '224.0.0.0/4', '240.0.0.0/4'
* @see http://en.wikipedia.org/wiki/Reserved_IP_addresses
*
* As of RFC5753 (JAN 2010), the following blocks are no longer reserved:
* - 128.0.0.0/16
* - 191.255.0.0/16
* - 223.255.255.0/24
* @see http://tools.ietf.org/html/rfc5735#page-6
*
* As of RFC6598 (APR 2012), the following blocks are now reserved:
* - 100.64.0.0/10
* @see http://tools.ietf.org/html/rfc6598#section-7
*
* @param string $host
* @return bool Returns false when minimal one of the given addresses is not reserved
*/
protected function isReserved($host)
{
if (! preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $host)) {
$host = gethostbynamel($host);
} else {
$host = [$host];
}
if (empty($host)) {
return false;
}
foreach ($host as $server) {
// @codingStandardsIgnoreStart
// Search for 0.0.0.0/8, 10.0.0.0/8, 127.0.0.0/8
if (!preg_match('/^(0|10|127)(\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))){3}$/', $server) &&
// Search for 100.64.0.0/10
!preg_match('/^100\.(6[0-4]|[7-9][0-9]|1[0-1][0-9]|12[0-7])(\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))){2}$/', $server) &&
// Search for 172.16.0.0/12
!preg_match('/^172\.(1[6-9]|2[0-9]|3[0-1])(\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))){2}$/', $server) &&
// Search for 198.18.0.0/15
!preg_match('/^198\.(1[8-9])(\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))){2}$/', $server) &&
// Search for 169.254.0.0/16, 192.168.0.0/16
!preg_match('/^(169\.254|192\.168)(\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))){2}$/', $server) &&
// Search for 192.0.2.0/24, 192.88.99.0/24, 198.51.100.0/24, 203.0.113.0/24
!preg_match('/^(192\.0\.2|192\.88\.99|198\.51\.100|203\.0\.113)\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))$/', $server) &&
// Search for 224.0.0.0/4, 240.0.0.0/4
!preg_match('/^(2(2[4-9]|[3-4][0-9]|5[0-5]))(\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))){3}$/', $server)
) {
return false;
}
// @codingStandardsIgnoreEnd
}
return true;
}
/**
* Internal method to validate the local part of the email address
*
* @return bool
*/
protected function validateLocalPart()
{
// First try to match the local part on the common dot-atom format
$result = false;
// Dot-atom characters are: 1*atext *("." 1*atext)
// atext: ALPHA / DIGIT / and "!", "#", "$", "%", "&", "'", "*",
// "+", "-", "/", "=", "?", "^", "_", "`", "{", "|", "}", "~"
$atext = 'a-zA-Z0-9\x21\x23\x24\x25\x26\x27\x2a\x2b\x2d\x2f\x3d\x3f\x5e\x5f\x60\x7b\x7c\x7d\x7e';
if (preg_match('/^[' . $atext . ']+(\x2e+[' . $atext . ']+)*$/', $this->localPart)) {
$result = true;
} elseif ($this->validateInternationalizedLocalPart($this->localPart)) {
$result = true;
} else {
// Try quoted string format (RFC 5321 Chapter 4.1.2)
// Quoted-string characters are: DQUOTE *(qtext/quoted-pair) DQUOTE
$qtext = '\x20-\x21\x23-\x5b\x5d-\x7e'; // %d32-33 / %d35-91 / %d93-126
$quotedPair = '\x20-\x7e'; // %d92 %d32-126
if (preg_match('/^"(['. $qtext .']|\x5c[' . $quotedPair . '])*"$/', $this->localPart)) {
$result = true;
} else {
$this->error(self::DOT_ATOM);
$this->error(self::QUOTED_STRING);
$this->error(self::INVALID_LOCAL_PART);
}
}
return $result;
}
/**
* @param string $localPart Address local part to validate.
* @return bool
*/
protected function validateInternationalizedLocalPart($localPart)
{
if (extension_loaded('intl')
&& false === UConverter::transcode($localPart, 'UTF-8', 'UTF-8')
) {
// invalid utf?
return false;
}
$atext = 'a-zA-Z0-9\x21\x23\x24\x25\x26\x27\x2a\x2b\x2d\x2f\x3d\x3f\x5e\x5f\x60\x7b\x7c\x7d\x7e';
// RFC 6532 extends atext to include non-ascii utf
// @see https://tools.ietf.org/html/rfc6532#section-3.1
$uatext = $atext . '\x{80}-\x{FFFF}';
return (bool) preg_match('/^[' . $uatext . ']+(\x2e+[' . $uatext . ']+)*$/u', $localPart);
}
/**
* Returns the found MX Record information after validation including weight for further processing
*
* @return array
*/
public function getMXRecord()
{
return $this->mxRecord;
}
/**
* Internal method to validate the servers MX records
*
* @return bool
*/
protected function validateMXRecords()
{
$mxHosts = [];
$weight = [];
$result = getmxrr($this->hostname, $mxHosts, $weight);
if (! empty($mxHosts) && ! empty($weight)) {
$this->mxRecord = array_combine($mxHosts, $weight) ?: [];
} else {
$this->mxRecord = [];
}
arsort($this->mxRecord);
// Fallback to IPv4 hosts if no MX record found (RFC 2821 SS 5).
if (! $result) {
$result = gethostbynamel($this->hostname);
if (is_array($result)) {
$this->mxRecord = array_flip($result);
}
}
if (! $result) {
$this->error(self::INVALID_MX_RECORD);
return $result;
}
if (! $this->options['useDeepMxCheck']) {
return $result;
}
$validAddress = false;
$reserved = true;
foreach ($this->mxRecord as $hostname => $weight) {
$res = $this->isReserved($hostname);
if (! $res) {
$reserved = false;
}
if (! $res
&& (checkdnsrr($hostname, "A")
|| checkdnsrr($hostname, "AAAA")
|| checkdnsrr($hostname, "A6"))
) {
$validAddress = true;
break;
}
}
if (! $validAddress) {
$result = false;
$error = ($reserved) ? self::INVALID_SEGMENT : self::INVALID_MX_RECORD;
$this->error($error);
}
return $result;
}
/**
* Internal method to validate the hostname part of the email address
*
* @return bool
*/
protected function validateHostnamePart()
{
$hostname = $this->getHostnameValidator()->setTranslator($this->getTranslator())
->isValid($this->hostname);
if (! $hostname) {
$this->error(self::INVALID_HOSTNAME);
// Get messages and errors from hostnameValidator
foreach ($this->getHostnameValidator()->getMessages() as $code => $message) {
$this->abstractOptions['messages'][$code] = $message;
}
} elseif ($this->options['useMxCheck']) {
// MX check on hostname
$hostname = $this->validateMXRecords();
}
return $hostname;
}
/**
* Splits the given value in hostname and local part of the email address
*
* @param string $value Email address to be split
* @return bool Returns false when the email can not be split
*/
protected function splitEmailParts($value)
{
$value = is_string($value) ? $value : '';
// Split email address up and disallow '..'
if (strpos($value, '..') !== false
|| ! preg_match('/^(.+)@([^@]+)$/', $value, $matches)
) {
return false;
}
$this->localPart = $matches[1];
$this->hostname = $this->idnToAscii($matches[2]);
return true;
}
/**
* Defined by Zend\Validator\ValidatorInterface
*
* Returns true if and only if $value is a valid email address
* according to RFC2822
*
* @link http://www.ietf.org/rfc/rfc2822.txt RFC2822
* @link http://www.columbia.edu/kermit/ascii.html US-ASCII characters
* @param string $value
* @return bool
*/
public function isValid($value)
{
if (! is_string($value)) {
$this->error(self::INVALID);
return false;
}
$length = true;
$this->setValue($value);
// Split email address up and disallow '..'
if (! $this->splitEmailParts($this->getValue())) {
$this->error(self::INVALID_FORMAT);
return false;
}
if ($this->getOption('strict') && (strlen($this->localPart) > 64) || (strlen($this->hostname) > 255)) {
$length = false;
$this->error(self::LENGTH_EXCEEDED);
}
// Match hostname part
$hostname = false;
if ($this->options['useDomainCheck']) {
$hostname = $this->validateHostnamePart();
}
$local = $this->validateLocalPart();
// If both parts valid, return true
return ($local && $length) && (! $this->options['useDomainCheck'] || $hostname);
}
/**
* Safely convert UTF-8 encoded domain name to ASCII
* @param string $email the UTF-8 encoded email
* @return string
*/
protected function idnToAscii($email)
{
if (extension_loaded('intl')) {
if (defined('INTL_IDNA_VARIANT_UTS46')) {
return (idn_to_ascii($email, 0, INTL_IDNA_VARIANT_UTS46) ?: $email);
}
return (idn_to_ascii($email) ?: $email);
}
return $email;
}
/**
* Safely convert ASCII encoded domain name to UTF-8
* @param string $email the ASCII encoded email
* @return string
*/
protected function idnToUtf8($email)
{
if (strlen($email) == 0) {
return $email;
}
if (extension_loaded('intl')) {
// The documentation does not clarify what kind of failure
// can happen in idn_to_utf8. One can assume if the source
// is not IDN encoded, it would fail, but it usually returns
// the source string in those cases.
// But not when the source string is long enough.
// Thus we default to source string ourselves.
if (defined('INTL_IDNA_VARIANT_UTS46')) {
return idn_to_utf8($email, 0, INTL_IDNA_VARIANT_UTS46) ?: $email;
}
return idn_to_utf8($email) ?: $email;
}
return $email;
}
}
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