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85ad3d82
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Assos Assos
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<?php
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/**
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* @file
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* Drupal core implementations of MailSystemInterface.
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*/
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/**
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* The default Drupal mail backend using PHP's mail function.
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*/
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class DefaultMailSystem implements MailSystemInterface {
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/**
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* Concatenate and wrap the e-mail body for plain-text mails.
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*
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* @param $message
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* A message array, as described in hook_mail_alter().
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*
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* @return
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* The formatted $message.
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*/
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public function format(array $message) {
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// Join the body array into one string.
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$message['body'] = implode("\n\n", $message['body']);
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// Convert any HTML to plain-text.
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$message['body'] = drupal_html_to_text($message['body']);
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// Wrap the mail body for sending.
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$message['body'] = drupal_wrap_mail($message['body']);
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return $message;
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}
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/**
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* Send an e-mail message, using Drupal variables and default settings.
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*
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* @see http://php.net/manual/function.mail.php
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* @see drupal_mail()
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*
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* @param $message
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* A message array, as described in hook_mail_alter().
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* @return
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* TRUE if the mail was successfully accepted, otherwise FALSE.
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*/
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public function mail(array $message) {
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// If 'Return-Path' isn't already set in php.ini, we pass it separately
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// as an additional parameter instead of in the header.
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// However, if PHP's 'safe_mode' is on, this is not allowed.
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if (isset($message['headers']['Return-Path']) && !ini_get('safe_mode')) {
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$return_path_set = strpos(ini_get('sendmail_path'), ' -f');
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if (!$return_path_set) {
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$message['Return-Path'] = $message['headers']['Return-Path'];
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unset($message['headers']['Return-Path']);
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}
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}
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$mimeheaders = array();
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foreach ($message['headers'] as $name => $value) {
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$mimeheaders[] = $name . ': ' . mime_header_encode($value);
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}
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$line_endings = variable_get('mail_line_endings', MAIL_LINE_ENDINGS);
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// Prepare mail commands.
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$mail_subject = mime_header_encode($message['subject']);
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// Note: e-mail uses CRLF for line-endings. PHP's API requires LF
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// on Unix and CRLF on Windows. Drupal automatically guesses the
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// line-ending format appropriate for your system. If you need to
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// override this, adjust $conf['mail_line_endings'] in settings.php.
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$mail_body = preg_replace('@\r?\n@', $line_endings, $message['body']);
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// For headers, PHP's API suggests that we use CRLF normally,
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// but some MTAs incorrectly replace LF with CRLF. See #234403.
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$mail_headers = join("\n", $mimeheaders);
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// We suppress warnings and notices from mail() because of issues on some
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// hosts. The return value of this method will still indicate whether mail
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// was sent successfully.
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if (!isset($_SERVER['WINDIR']) && strpos($_SERVER['SERVER_SOFTWARE'], 'Win32') === FALSE) {
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175ce36f
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Assos Assos
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// We validate the return path, unless it is equal to the site mail, which
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// we assume to be safe.
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if (isset($message['Return-Path']) && !ini_get('safe_mode') && (variable_get('site_mail', ini_get('sendmail_from')) === $message['Return-Path'] || self::_isShellSafe($message['Return-Path']))) {
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85ad3d82
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Assos Assos
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// On most non-Windows systems, the "-f" option to the sendmail command
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// is used to set the Return-Path. There is no space between -f and
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// the value of the return path.
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$mail_result = @mail(
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$message['to'],
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$mail_subject,
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$mail_body,
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$mail_headers,
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'-f' . $message['Return-Path']
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);
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}
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else {
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// The optional $additional_parameters argument to mail() is not
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// allowed if safe_mode is enabled. Passing any value throws a PHP
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// warning and makes mail() return FALSE.
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$mail_result = @mail(
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$message['to'],
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$mail_subject,
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$mail_body,
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$mail_headers
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);
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}
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}
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else {
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// On Windows, PHP will use the value of sendmail_from for the
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// Return-Path header.
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$old_from = ini_get('sendmail_from');
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ini_set('sendmail_from', $message['Return-Path']);
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$mail_result = @mail(
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$message['to'],
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$mail_subject,
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$mail_body,
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$mail_headers
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);
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ini_set('sendmail_from', $old_from);
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}
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return $mail_result;
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}
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175ce36f
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Assos Assos
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/**
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* Disallows potentially unsafe shell characters.
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*
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* Functionally similar to PHPMailer::isShellSafe() which resulted from
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* CVE-2016-10045. Note that escapeshellarg and escapeshellcmd are inadequate
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* for this purpose.
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*
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* @param string $string
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* The string to be validated.
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*
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* @return bool
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* True if the string is shell-safe.
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*
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* @see https://github.com/PHPMailer/PHPMailer/issues/924
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* @see https://github.com/PHPMailer/PHPMailer/blob/v5.2.21/class.phpmailer.php#L1430
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*
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* @todo Rename to ::isShellSafe() and/or discuss whether this is the correct
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* location for this helper.
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*/
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protected static function _isShellSafe($string) {
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if (escapeshellcmd($string) !== $string || !in_array(escapeshellarg($string), array("'$string'", "\"$string\""))) {
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return FALSE;
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}
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if (preg_match('/[^a-zA-Z0-9@_\-.]/', $string) !== 0) {
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return FALSE;
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}
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return TRUE;
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}
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85ad3d82
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Assos Assos
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}
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/**
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* A mail sending implementation that captures sent messages to a variable.
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*
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* This class is for running tests or for development.
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*/
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class TestingMailSystem extends DefaultMailSystem implements MailSystemInterface {
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/**
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* Accept an e-mail message and store it in a variable.
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*
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* @param $message
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* An e-mail message.
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*/
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public function mail(array $message) {
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$captured_emails = variable_get('drupal_test_email_collector', array());
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$captured_emails[] = $message;
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variable_set('drupal_test_email_collector', $captured_emails);
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return TRUE;
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}
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}
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