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<?php /** * PHPMailer - PHP email creation and transport class. * PHP Version 5.5. * * @see https://github.com/PHPMailer/PHPMailer/ The PHPMailer GitHub project * * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk> * @author Jim Jagielski (jimjag) <jimjag@gmail.com> * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net> * @author Brent R. Matzelle (original founder) * @copyright 2012 - 2020 Marcus Bointon * @copyright 2010 - 2012 Jim Jagielski * @copyright 2004 - 2009 Andy Prevost * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License * @note This program is distributed in the hope that it will be useful - WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. */ namespace PHPMailer\PHPMailer; /** * PHPMailer - PHP email creation and transport class. * * @author Marcus Bointon (Synchro/coolbru) <phpmailer@synchromedia.co.uk> * @author Jim Jagielski (jimjag) <jimjag@gmail.com> * @author Andy Prevost (codeworxtech) <codeworxtech@users.sourceforge.net> * @author Brent R. Matzelle (original founder) */ class PHPMailer { const CHARSET_ASCII = 'us-ascii'; const CHARSET_ISO88591 = 'iso-8859-1'; const CHARSET_UTF8 = 'utf-8'; const CONTENT_TYPE_PLAINTEXT = 'text/plain'; const CONTENT_TYPE_TEXT_CALENDAR = 'text/calendar'; const CONTENT_TYPE_TEXT_HTML = 'text/html'; const CONTENT_TYPE_MULTIPART_ALTERNATIVE = 'multipart/alternative'; const CONTENT_TYPE_MULTIPART_MIXED = 'multipart/mixed'; const CONTENT_TYPE_MULTIPART_RELATED = 'multipart/related'; const ENCODING_7BIT = '7bit'; const ENCODING_8BIT = '8bit'; const ENCODING_BASE64 = 'base64'; const ENCODING_BINARY = 'binary'; const ENCODING_QUOTED_PRINTABLE = 'quoted-printable'; const ENCRYPTION_STARTTLS = 'tls'; const ENCRYPTION_SMTPS = 'ssl'; const ICAL_METHOD_REQUEST = 'REQUEST'; const ICAL_METHOD_PUBLISH = 'PUBLISH'; const ICAL_METHOD_REPLY = 'REPLY'; const ICAL_METHOD_ADD = 'ADD'; const ICAL_METHOD_CANCEL = 'CANCEL'; const ICAL_METHOD_REFRESH = 'REFRESH'; const ICAL_METHOD_COUNTER = 'COUNTER'; const ICAL_METHOD_DECLINECOUNTER = 'DECLINECOUNTER'; /** * Email priority. * Options: null (default), 1 = High, 3 = Normal, 5 = low. * When null, the header is not set at all. * * @var int|null */ public $Priority; /** * The character set of the message. * * @var string */ public $CharSet = self::CHARSET_ISO88591; /** * The MIME Content-type of the message. * * @var string */ public $ContentType = self::CONTENT_TYPE_PLAINTEXT; /** * The message encoding. * Options: "8bit", "7bit", "binary", "base64", and "quoted-printable". * * @var string */ public $Encoding = self::ENCODING_8BIT; /** * Holds the most recent mailer error message. * * @var string */ public $ErrorInfo = ''; /** * The From email address for the message. * * @var string */ public $From = ''; /** * The From name of the message. * * @var string */ public $FromName = ''; /** * The envelope sender of the message. * This will usually be turned into a Return-Path header by the receiver, * and is the address that bounces will be sent to. * If not empty, will be passed via `-f` to sendmail or as the 'MAIL FROM' value over SMTP. * * @var string */ public $Sender = ''; /** * The Subject of the message. * * @var string */ public $Subject = ''; /** * An HTML or plain text message body. * If HTML then call isHTML(true). * * @var string */ public $Body = ''; /** * The plain-text message body. * This body can be read by mail clients that do not have HTML email * capability such as mutt & Eudora. * Clients that can read HTML will view the normal Body. * * @var string */ public $AltBody = ''; /** * An iCal message part body. * Only supported in simple alt or alt_inline message types * To generate iCal event structures, use classes like EasyPeasyICS or iCalcreator. * * @see http://sprain.ch/blog/downloads/php-class-easypeasyics-create-ical-files-with-php/ * @see http://kigkonsult.se/iCalcreator/ * * @var string */ public $Ical = ''; /** * Value-array of "method" in Contenttype header "text/calendar" * * @var string[] */ protected static $IcalMethods = [ self::ICAL_METHOD_REQUEST, self::ICAL_METHOD_PUBLISH, self::ICAL_METHOD_REPLY, self::ICAL_METHOD_ADD, self::ICAL_METHOD_CANCEL, self::ICAL_METHOD_REFRESH, self::ICAL_METHOD_COUNTER, self::ICAL_METHOD_DECLINECOUNTER, ]; /** * The complete compiled MIME message body. * * @var string */ protected $MIMEBody = ''; /** * The complete compiled MIME message headers. * * @var string */ protected $MIMEHeader = ''; /** * Extra headers that createHeader() doesn't fold in. * * @var string */ protected $mailHeader = ''; /** * Word-wrap the message body to this number of chars. * Set to 0 to not wrap. A useful value here is 78, for RFC2822 section 2.1.1 compliance. * * @see static::STD_LINE_LENGTH * * @var int */ public $WordWrap = 0; /** * Which method to use to send mail. * Options: "mail", "sendmail", or "smtp". * * @var string */ public $Mailer = 'mail'; /** * The path to the sendmail program. * * @var string */ public $Sendmail = '/usr/sbin/sendmail'; /** * Whether mail() uses a fully sendmail-compatible MTA. * One which supports sendmail's "-oi -f" options. * * @var bool */ public $UseSendmailOptions = true; /** * The email address that a reading confirmation should be sent to, also known as read receipt. * * @var string */ public $ConfirmReadingTo = ''; /** * The hostname to use in the Message-ID header and as default HELO string. * If empty, PHPMailer attempts to find one with, in order, * $_SERVER['SERVER_NAME'], gethostname(), php_uname('n'), or the value * 'localhost.localdomain'. * * @see PHPMailer::$Helo * * @var string */ public $Hostname = ''; /** * An ID to be used in the Message-ID header. * If empty, a unique id will be generated. * You can set your own, but it must be in the format "<id@domain>", * as defined in RFC5322 section 3.6.4 or it will be ignored. * * @see https://tools.ietf.org/html/rfc5322#section-3.6.4 * * @var string */ public $MessageID = ''; /** * The message Date to be used in the Date header. * If empty, the current date will be added. * * @var string */ public $MessageDate = ''; /** * SMTP hosts. * Either a single hostname or multiple semicolon-delimited hostnames. * You can also specify a different port * for each host by using this format: [hostname:port] * (e.g. "smtp1.example.com:25;smtp2.example.com"). * You can also specify encryption type, for example: * (e.g. "tls://smtp1.example.com:587;ssl://smtp2.example.com:465"). * Hosts will be tried in order. * * @var string */ public $Host = 'localhost'; /** * The default SMTP server port. * * @var int */ public $Port = 25; /** * The SMTP HELO/EHLO name used for the SMTP connection. * Default is $Hostname. If $Hostname is empty, PHPMailer attempts to find * one with the same method described above for $Hostname. * * @see PHPMailer::$Hostname * * @var string */ public $Helo = ''; /** * What kind of encryption to use on the SMTP connection. * Options: '', static::ENCRYPTION_STARTTLS, or static::ENCRYPTION_SMTPS. * * @var string */ public $SMTPSecure = ''; /** * Whether to enable TLS encryption automatically if a server supports it, * even if `SMTPSecure` is not set to 'tls'. * Be aware that in PHP >= 5.6 this requires that the server's certificates are valid. * * @var bool */ public $SMTPAutoTLS = true; /** * Whether to use SMTP authentication. * Uses the Username and Password properties. * * @see PHPMailer::$Username * @see PHPMailer::$Password * * @var bool */ public $SMTPAuth = false; /** * Options array passed to stream_context_create when connecting via SMTP. * * @var array */ public $SMTPOptions = []; /** * SMTP username. * * @var string */ public $Username = ''; /** * SMTP password. * * @var string */ public $Password = ''; /** * SMTP auth type. * Options are CRAM-MD5, LOGIN, PLAIN, XOAUTH2, attempted in that order if not specified. * * @var string */ public $AuthType = ''; /** * An implementation of the PHPMailer OAuthTokenProvider interface. * * @var OAuthTokenProvider */ protected $oauth; /** * The SMTP server timeout in seconds. * Default of 5 minutes (300sec) is from RFC2821 section 4.5.3.2. * * @var int */ public $Timeout = 300; /** * Comma separated list of DSN notifications * 'NEVER' under no circumstances a DSN must be returned to the sender. * If you use NEVER all other notifications will be ignored. * 'SUCCESS' will notify you when your mail has arrived at its destination. * 'FAILURE' will arrive if an error occurred during delivery. * 'DELAY' will notify you if there is an unusual delay in delivery, but the actual * delivery's outcome (success or failure) is not yet decided. * * @see https://tools.ietf.org/html/rfc3461 See section 4.1 for more information about NOTIFY */ public $dsn = ''; /** * SMTP class debug output mode. * Debug output level. * Options: * @see SMTP::DEBUG_OFF: No output * @see SMTP::DEBUG_CLIENT: Client messages * @see SMTP::DEBUG_SERVER: Client and server messages * @see SMTP::DEBUG_CONNECTION: As SERVER plus connection status * @see SMTP::DEBUG_LOWLEVEL: Noisy, low-level data output, rarely needed * * @see SMTP::$do_debug * * @var int */ public $SMTPDebug = 0; /** * How to handle debug output. * Options: * * `echo` Output plain-text as-is, appropriate for CLI * * `html` Output escaped, line breaks converted to `<br>`, appropriate for browser output * * `error_log` Output to error log as configured in php.ini * By default PHPMailer will use `echo` if run from a `cli` or `cli-server` SAPI, `html` otherwise. * Alternatively, you can provide a callable expecting two params: a message string and the debug level: * * ```php * $mail->Debugoutput = function($str, $level) {echo "debug level $level; message: $str";}; * ``` * * Alternatively, you can pass in an instance of a PSR-3 compatible logger, though only `debug` * level output is used: * * ```php * $mail->Debugoutput = new myPsr3Logger; * ``` * * @see SMTP::$Debugoutput * * @var string|callable|\Psr\Log\LoggerInterface */ public $Debugoutput = 'echo'; /** * Whether to keep the SMTP connection open after each message. * If this is set to true then the connection will remain open after a send, * and closing the connection will require an explicit call to smtpClose(). * It's a good idea to use this if you are sending multiple messages as it reduces overhead. * See the mailing list example for how to use it. * * @var bool */ public $SMTPKeepAlive = false; /** * Whether to split multiple to addresses into multiple messages * or send them all in one message. * Only supported in `mail` and `sendmail` transports, not in SMTP. * * @var bool * * @deprecated 6.0.0 PHPMailer isn't a mailing list manager! */ public $SingleTo = false; /** * Storage for addresses when SingleTo is enabled. * * @var array */ protected $SingleToArray = []; /** * Whether to generate VERP addresses on send. * Only applicable when sending via SMTP. * * @see https://en.wikipedia.org/wiki/Variable_envelope_return_path * @see http://www.postfix.org/VERP_README.html Postfix VERP info * * @var bool */ public $do_verp = false; /** * Whether to allow sending messages with an empty body. * * @var bool */ public $AllowEmpty = false; /** * DKIM selector. * * @var string */ public $DKIM_selector = ''; /** * DKIM Identity. * Usually the email address used as the source of the email. * * @var string */ public $DKIM_identity = ''; /** * DKIM passphrase. * Used if your key is encrypted. * * @var string */ public $DKIM_passphrase = ''; /** * DKIM signing domain name. * * @example 'example.com' * * @var string */ public $DKIM_domain = ''; /** * DKIM Copy header field values for diagnostic use. * * @var bool */ public $DKIM_copyHeaderFields = true; /** * DKIM Extra signing headers. * * @example ['List-Unsubscribe', 'List-Help'] * * @var array */ public $DKIM_extraHeaders = []; /** * DKIM private key file path. * * @var string */ public $DKIM_private = ''; /** * DKIM private key string. * * If set, takes precedence over `$DKIM_private`. * * @var string */ public $DKIM_private_string = ''; /** * Callback Action function name. * * The function that handles the result of the send email action. * It is called out by send() for each email sent. * * Value can be any php callable: http://www.php.net/is_callable * * Parameters: * bool $result result of the send action * array $to email addresses of the recipients * array $cc cc email addresses * array $bcc bcc email addresses * string $subject the subject * string $body the email body * string $from email address of sender * string $extra extra information of possible use * "smtp_transaction_id' => last smtp transaction id * * @var string */ public $action_function = ''; /** * What to put in the X-Mailer header. * Options: An empty string for PHPMailer default, whitespace/null for none, or a string to use. * * @var string|null */ public $XMailer = ''; /** * Which validator to use by default when validating email addresses. * May be a callable to inject your own validator, but there are several built-in validators. * The default validator uses PHP's FILTER_VALIDATE_EMAIL filter_var option. * * @see PHPMailer::validateAddress() * * @var string|callable */ public static $validator = 'php'; /** * An instance of the SMTP sender class. * * @var SMTP */ protected $smtp; /** * The array of 'to' names and addresses. * * @var array */ protected $to = []; /** * The array of 'cc' names and addresses. * * @var array */ protected $cc = []; /** * The array of 'bcc' names and addresses. * * @var array */ protected $bcc = []; /** * The array of reply-to names and addresses. * * @var array */ protected $ReplyTo = []; /** * An array of all kinds of addresses. * Includes all of $to, $cc, $bcc. * * @see PHPMailer::$to * @see PHPMailer::$cc * @see PHPMailer::$bcc * * @var array */ protected $all_recipients = []; /** * An array of names and addresses queued for validation. * In send(), valid and non duplicate entries are moved to $all_recipients * and one of $to, $cc, or $bcc. * This array is used only for addresses with IDN. * * @see PHPMailer::$to * @see PHPMailer::$cc * @see PHPMailer::$bcc * @see PHPMailer::$all_recipients * * @var array */ protected $RecipientsQueue = []; /** * An array of reply-to names and addresses queued for validation. * In send(), valid and non duplicate entries are moved to $ReplyTo. * This array is used only for addresses with IDN. * * @see PHPMailer::$ReplyTo * * @var array */ protected $ReplyToQueue = []; /** * The array of attachments. * * @var array */ protected $attachment = []; /** * The array of custom headers. * * @var array */ protected $CustomHeader = []; /** * The most recent Message-ID (including angular brackets). * * @var string */ protected $lastMessageID = ''; /** * The message's MIME type. * * @var string */ protected $message_type = ''; /** * The array of MIME boundary strings. * * @var array */ protected $boundary = []; /** * The array of available text strings for the current language. * * @var array */ protected $language = []; /** * The number of errors encountered. * * @var int */ protected $error_count = 0; /** * The S/MIME certificate file path. * * @var string */ protected $sign_cert_file = ''; /** * The S/MIME key file path. * * @var string */ protected $sign_key_file = ''; /** * The optional S/MIME extra certificates ("CA Chain") file path. * * @var string */ protected $sign_extracerts_file = ''; /** * The S/MIME password for the key. * Used only if the key is encrypted. * * @var string */ protected $sign_key_pass = ''; /** * Whether to throw exceptions for errors. * * @var bool */ protected $exceptions = false; /** * Unique ID used for message ID and boundaries. * * @var string */ protected $uniqueid = ''; /** * The PHPMailer Version number. * * @var string */ const VERSION = '6.6.3'; /** * Error severity: message only, continue processing. * * @var int */ const STOP_MESSAGE = 0; /** * Error severity: message, likely ok to continue processing. * * @var int */ const STOP_CONTINUE = 1; /** * Error severity: message, plus full stop, critical error reached. * * @var int */ const STOP_CRITICAL = 2; /** * The SMTP standard CRLF line break. * If you want to change line break format, change static::$LE, not this. */ const CRLF = "\r\n"; /** * "Folding White Space" a white space string used for line folding. */ const FWS = ' '; /** * SMTP RFC standard line ending; Carriage Return, Line Feed. * * @var string */ protected static $LE = self::CRLF; /** * The maximum line length supported by mail(). * * Background: mail() will sometimes corrupt messages * with headers headers longer than 65 chars, see #818. * * @var int */ const MAIL_MAX_LINE_LENGTH = 63; /** * The maximum line length allowed by RFC 2822 section 2.1.1. * * @var int */ const MAX_LINE_LENGTH = 998; /** * The lower maximum line length allowed by RFC 2822 section 2.1.1. * This length does NOT include the line break * 76 means that lines will be 77 or 78 chars depending on whether * the line break format is LF or CRLF; both are valid. * * @var int */ const STD_LINE_LENGTH = 76; /** * Constructor. * * @param bool $exceptions Should we throw external exceptions? */ public function __construct($exceptions = null) { if (null !== $exceptions) { $this->exceptions = (bool) $exceptions; } //Pick an appropriate debug output format automatically $this->Debugoutput = (strpos(PHP_SAPI, 'cli') !== false ? 'echo' : 'html'); } /** * Destructor. */ public function __destruct() { //Close any open SMTP connection nicely $this->smtpClose(); } /** * Call mail() in a safe_mode-aware fashion. * Also, unless sendmail_path points to sendmail (or something that * claims to be sendmail), don't pass params (not a perfect fix, * but it will do). * * @param string $to To * @param string $subject Subject * @param string $body Message Body * @param string $header Additional Header(s) * @param string|null $params Params * * @return bool */ private function mailPassthru($to, $subject, $body, $header, $params) { //Check overloading of mail function to avoid double-encoding if (ini_get('mbstring.func_overload') & 1) { $subject = $this->secureHeader($subject); } else { $subject = $this->encodeHeader($this->secureHeader($subject)); } //Calling mail() with null params breaks $this->edebug('Sending with mail()'); $this->edebug('Sendmail path: ' . ini_get('sendmail_path')); $this->edebug("Envelope sender: {$this->Sender}"); $this->edebug("To: {$to}"); $this->edebug("Subject: {$subject}"); $this->edebug("Headers: {$header}"); if (!$this->UseSendmailOptions || null === $params) { $result = @mail($to, $subject, $body, $header); } else { $this->edebug("Additional params: {$params}"); $result = @mail($to, $subject, $body, $header, $params); } $this->edebug('Result: ' . ($result ? 'true' : 'false')); return $result; } /** * Output debugging info via a user-defined method. * Only generates output if debug output is enabled. * * @see PHPMailer::$Debugoutput * @see PHPMailer::$SMTPDebug * * @param string $str */ protected function edebug($str) { if ($this->SMTPDebug <= 0) { return; } //Is this a PSR-3 logger? if ($this->Debugoutput instanceof \Psr\Log\LoggerInterface) { $this->Debugoutput->debug($str); return; } //Avoid clash with built-in function names if (is_callable($this->Debugoutput) && !in_array($this->Debugoutput, ['error_log', 'html', 'echo'])) { call_user_func($this->Debugoutput, $str, $this->SMTPDebug); return; } switch ($this->Debugoutput) { case 'error_log': //Don't output, just log /** @noinspection ForgottenDebugOutputInspection */ error_log($str); break; case 'html': //Cleans up output a bit for a better looking, HTML-safe output echo htmlentities( preg_replace('/[\r\n]+/', '', $str), ENT_QUOTES, 'UTF-8' ), "<br>\n"; break; case 'echo': default: //Normalize line breaks $str = preg_replace('/\r\n|\r/m', "\n", $str); echo gmdate('Y-m-d H:i:s'), "\t", //Trim trailing space trim( //Indent for readability, except for trailing break str_replace( "\n", "\n \t ", trim($str) ) ), "\n"; } } /** * Sets message type to HTML or plain. * * @param bool $isHtml True for HTML mode */ public function isHTML($isHtml = true) { if ($isHtml) { $this->ContentType = static::CONTENT_TYPE_TEXT_HTML; } else { $this->ContentType = static::CONTENT_TYPE_PLAINTEXT; } } /** * Send messages using SMTP. */ public function isSMTP() { $this->Mailer = 'smtp'; } /** * Send messages using PHP's mail() function. */ public function isMail() { $this->Mailer = 'mail'; } /** * Send messages using $Sendmail. */ public function isSendmail() { $ini_sendmail_path = ini_get('sendmail_path'); if (false === stripos($ini_sendmail_path, 'sendmail')) { $this->Sendmail = '/usr/sbin/sendmail'; } else { $this->Sendmail = $ini_sendmail_path; } $this->Mailer = 'sendmail'; } /** * Send messages using qmail. */ public function isQmail() { $ini_sendmail_path = ini_get('sendmail_path'); if (false === stripos($ini_sendmail_path, 'qmail')) { $this->Sendmail = '/var/qmail/bin/qmail-inject'; } else { $this->Sendmail = $ini_sendmail_path; } $this->Mailer = 'qmail'; } /** * Add a "To" address. * * @param string $address The email address to send to * @param string $name * * @throws Exception * * @return bool true on success, false if address already used or invalid in some way */ public function addAddress($address, $name = '') { return $this->addOrEnqueueAnAddress('to', $address, $name); } /** * Add a "CC" address. * * @param string $address The email address to send to * @param string $name * * @throws Exception * * @return bool true on success, false if address already used or invalid in some way */ public function addCC($address, $name = '') { return $this->addOrEnqueueAnAddress('cc', $address, $name); } /** * Add a "BCC" address. * * @param string $address The email address to send to * @param string $name * * @throws Exception * * @return bool true on success, false if address already used or invalid in some way */ public function addBCC($address, $name = '') { return $this->addOrEnqueueAnAddress('bcc', $address, $name); } /** * Add a "Reply-To" address. * * @param string $address The email address to reply to * @param string $name * * @throws Exception * * @return bool true on success, false if address already used or invalid in some way */ public function addReplyTo($address, $name = '') { return $this->addOrEnqueueAnAddress('Reply-To', $address, $name); } /** * Add an address to one of the recipient arrays or to the ReplyTo array. Because PHPMailer * can't validate addresses with an IDN without knowing the PHPMailer::$CharSet (that can still * be modified after calling this function), addition of such addresses is delayed until send(). * Addresses that have been added already return false, but do not throw exceptions. * * @param string $kind One of 'to', 'cc', 'bcc', or 'ReplyTo' * @param string $address The email address * @param string $name An optional username associated with the address * * @throws Exception * * @return bool true on success, false if address already used or invalid in some way */ protected function addOrEnqueueAnAddress($kind, $address, $name) { $pos = false; if ($address !== null) { $address = trim($address); $pos = strrpos($address, '@'); } if (false === $pos) { //At-sign is missing. $error_message = sprintf( '%s (%s): %s', $this->lang('invalid_address'), $kind, $address ); $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { throw new Exception($error_message); } return false; } if ($name !== null) { $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim } else { $name = ''; } $params = [$kind, $address, $name]; //Enqueue addresses with IDN until we know the PHPMailer::$CharSet. //Domain is assumed to be whatever is after the last @ symbol in the address if (static::idnSupported() && $this->has8bitChars(substr($address, ++$pos))) { if ('Reply-To' !== $kind) { if (!array_key_exists($address, $this->RecipientsQueue)) { $this->RecipientsQueue[$address] = $params; return true; } } elseif (!array_key_exists($address, $this->ReplyToQueue)) { $this->ReplyToQueue[$address] = $params; return true; } return false; } //Immediately add standard addresses without IDN. return call_user_func_array([$this, 'addAnAddress'], $params); } /** * Add an address to one of the recipient arrays or to the ReplyTo array. * Addresses that have been added already return false, but do not throw exceptions. * * @param string $kind One of 'to', 'cc', 'bcc', or 'ReplyTo' * @param string $address The email address to send, resp. to reply to * @param string $name * * @throws Exception * * @return bool true on success, false if address already used or invalid in some way */ protected function addAnAddress($kind, $address, $name = '') { if (!in_array($kind, ['to', 'cc', 'bcc', 'Reply-To'])) { $error_message = sprintf( '%s: %s', $this->lang('Invalid recipient kind'), $kind ); $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { throw new Exception($error_message); } return false; } if (!static::validateAddress($address)) { $error_message = sprintf( '%s (%s): %s', $this->lang('invalid_address'), $kind, $address ); $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { throw new Exception($error_message); } return false; } if ('Reply-To' !== $kind) { if (!array_key_exists(strtolower($address), $this->all_recipients)) { $this->{$kind}[] = [$address, $name]; $this->all_recipients[strtolower($address)] = true; return true; } } elseif (!array_key_exists(strtolower($address), $this->ReplyTo)) { $this->ReplyTo[strtolower($address)] = [$address, $name]; return true; } return false; } /** * Parse and validate a string containing one or more RFC822-style comma-separated email addresses * of the form "display name <address>" into an array of name/address pairs. * Uses the imap_rfc822_parse_adrlist function if the IMAP extension is available. * Note that quotes in the name part are removed. * * @see http://www.andrew.cmu.edu/user/agreen1/testing/mrbs/web/Mail/RFC822.php A more careful implementation * * @param string $addrstr The address list string * @param bool $useimap Whether to use the IMAP extension to parse the list * @param string $charset The charset to use when decoding the address list string. * * @return array */ public static function parseAddresses($addrstr, $useimap = true, $charset = self::CHARSET_ISO88591) { $addresses = []; if ($useimap && function_exists('imap_rfc822_parse_adrlist')) { //Use this built-in parser if it's available $list = imap_rfc822_parse_adrlist($addrstr, ''); // Clear any potential IMAP errors to get rid of notices being thrown at end of script. imap_errors(); foreach ($list as $address) { if ( '.SYNTAX-ERROR.' !== $address->host && static::validateAddress($address->mailbox . '@' . $address->host) ) { //Decode the name part if it's present and encoded if ( property_exists($address, 'personal') && //Check for a Mbstring constant rather than using extension_loaded, which is sometimes disabled defined('MB_CASE_UPPER') && preg_match('/^=\?.*\?=$/s', $address->personal) ) { $origCharset = mb_internal_encoding(); mb_internal_encoding($charset); //Undo any RFC2047-encoded spaces-as-underscores $address->personal = str_replace('_', '=20', $address->personal); //Decode the name $address->personal = mb_decode_mimeheader($address->personal); mb_internal_encoding($origCharset); } $addresses[] = [ 'name' => (property_exists($address, 'personal') ? $address->personal : ''), 'address' => $address->mailbox . '@' . $address->host, ]; } } } else { //Use this simpler parser $list = explode(',', $addrstr); foreach ($list as $address) { $address = trim($address); //Is there a separate name part? if (strpos($address, '<') === false) { //No separate name, just use the whole thing if (static::validateAddress($address)) { $addresses[] = [ 'name' => '', 'address' => $address, ]; } } else { list($name, $email) = explode('<', $address); $email = trim(str_replace('>', '', $email)); $name = trim($name); if (static::validateAddress($email)) { //Check for a Mbstring constant rather than using extension_loaded, which is sometimes disabled //If this name is encoded, decode it if (defined('MB_CASE_UPPER') && preg_match('/^=\?.*\?=$/s', $name)) { $origCharset = mb_internal_encoding(); mb_internal_encoding($charset); //Undo any RFC2047-encoded spaces-as-underscores $name = str_replace('_', '=20', $name); //Decode the name $name = mb_decode_mimeheader($name); mb_internal_encoding($origCharset); } $addresses[] = [ //Remove any surrounding quotes and spaces from the name 'name' => trim($name, '\'" '), 'address' => $email, ]; } } } } return $addresses; } /** * Set the From and FromName properties. * * @param string $address * @param string $name * @param bool $auto Whether to also set the Sender address, defaults to true * * @throws Exception * * @return bool */ public function setFrom($address, $name = '', $auto = true) { $address = trim($address); $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim //Don't validate now addresses with IDN. Will be done in send(). $pos = strrpos($address, '@'); if ( (false === $pos) || ((!$this->has8bitChars(substr($address, ++$pos)) || !static::idnSupported()) && !static::validateAddress($address)) ) { $error_message = sprintf( '%s (From): %s', $this->lang('invalid_address'), $address ); $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { throw new Exception($error_message); } return false; } $this->From = $address; $this->FromName = $name; if ($auto && empty($this->Sender)) { $this->Sender = $address; } return true; } /** * Return the Message-ID header of the last email. * Technically this is the value from the last time the headers were created, * but it's also the message ID of the last sent message except in * pathological cases. * * @return string */ public function getLastMessageID() { return $this->lastMessageID; } /** * Check that a string looks like an email address. * Validation patterns supported: * * `auto` Pick best pattern automatically; * * `pcre8` Use the squiloople.com pattern, requires PCRE > 8.0; * * `pcre` Use old PCRE implementation; * * `php` Use PHP built-in FILTER_VALIDATE_EMAIL; * * `html5` Use the pattern given by the HTML5 spec for 'email' type form input elements. * * `noregex` Don't use a regex: super fast, really dumb. * Alternatively you may pass in a callable to inject your own validator, for example: * * ```php * PHPMailer::validateAddress('user@example.com', function($address) { * return (strpos($address, '@') !== false); * }); * ``` * * You can also set the PHPMailer::$validator static to a callable, allowing built-in methods to use your validator. * * @param string $address The email address to check * @param string|callable $patternselect Which pattern to use * * @return bool */ public static function validateAddress($address, $patternselect = null) { if (null === $patternselect) { $patternselect = static::$validator; } //Don't allow strings as callables, see SECURITY.md and CVE-2021-3603 if (is_callable($patternselect) && !is_string($patternselect)) { return call_user_func($patternselect, $address); } //Reject line breaks in addresses; it's valid RFC5322, but not RFC5321 if (strpos($address, "\n") !== false || strpos($address, "\r") !== false) { return false; } switch ($patternselect) { case 'pcre': //Kept for BC case 'pcre8': /* * A more complex and more permissive version of the RFC5322 regex on which FILTER_VALIDATE_EMAIL * is based. * In addition to the addresses allowed by filter_var, also permits: * * dotless domains: `a@b` * * comments: `1234 @ local(blah) .machine .example` * * quoted elements: `'"test blah"@example.org'` * * numeric TLDs: `a@b.123` * * unbracketed IPv4 literals: `a@192.168.0.1` * * IPv6 literals: 'first.last@[IPv6:a1::]' * Not all of these will necessarily work for sending! * * @see http://squiloople.com/2009/12/20/email-address-validation/ * @copyright 2009-2010 Michael Rushton * Feel free to use and redistribute this code. But please keep this copyright notice. */ return (bool) preg_match( '/^(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){255,})(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){65,}@)' . '((?>(?>(?>((?>(?>(?>\x0D\x0A)?[\t ])+|(?>[\t ]*\x0D\x0A)?[\t ]+)?)(\((?>(?2)' . '(?>[\x01-\x08\x0B\x0C\x0E-\'*-\[\]-\x7F]|\\\[\x00-\x7F]|(?3)))*(?2)\)))+(?2))|(?2))?)' . '([!#-\'*+\/-9=?^-~-]+|"(?>(?2)(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\x7F]))*' . '(?2)")(?>(?1)\.(?1)(?4))*(?1)@(?!(?1)[a-z0-9-]{64,})(?1)(?>([a-z0-9](?>[a-z0-9-]*[a-z0-9])?)' . '(?>(?1)\.(?!(?1)[a-z0-9-]{64,})(?1)(?5)){0,126}|\[(?:(?>IPv6:(?>([a-f0-9]{1,4})(?>:(?6)){7}' . '|(?!(?:.*[a-f0-9][:\]]){8,})((?6)(?>:(?6)){0,6})?::(?7)?))|(?>(?>IPv6:(?>(?6)(?>:(?6)){5}:' . '|(?!(?:.*[a-f0-9]:){6,})(?8)?::(?>((?6)(?>:(?6)){0,4}):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2}' . '|[1-9]?[0-9])(?>\.(?9)){3}))\])(?1)$/isD', $address ); case 'html5': /* * This is the pattern used in the HTML5 spec for validation of 'email' type form input elements. * * @see https://html.spec.whatwg.org/#e-mail-state-(type=email) */ return (bool) preg_match( '/^[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}' . '[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/sD', $address ); case 'php': default: return filter_var($address, FILTER_VALIDATE_EMAIL) !== false; } } /** * Tells whether IDNs (Internationalized Domain Names) are supported or not. This requires the * `intl` and `mbstring` PHP extensions. * * @return bool `true` if required functions for IDN support are present */ public static function idnSupported() { return function_exists('idn_to_ascii') && function_exists('mb_convert_encoding'); } /** * Converts IDN in given email address to its ASCII form, also known as punycode, if possible. * Important: Address must be passed in same encoding as currently set in PHPMailer::$CharSet. * This function silently returns unmodified address if: * - No conversion is necessary (i.e. domain name is not an IDN, or is already in ASCII form) * - Conversion to punycode is impossible (e.g. required PHP functions are not available) * or fails for any reason (e.g. domain contains characters not allowed in an IDN). * * @see PHPMailer::$CharSet * * @param string $address The email address to convert * * @return string The encoded address in ASCII form */ public function punyencodeAddress($address) { //Verify we have required functions, CharSet, and at-sign. $pos = strrpos($address, '@'); if ( !empty($this->CharSet) && false !== $pos && static::idnSupported() ) { $domain = substr($address, ++$pos); //Verify CharSet string is a valid one, and domain properly encoded in this CharSet. if ($this->has8bitChars($domain) && @mb_check_encoding($domain, $this->CharSet)) { //Convert the domain from whatever charset it's in to UTF-8 $domain = mb_convert_encoding($domain, self::CHARSET_UTF8, $this->CharSet); //Ignore IDE complaints about this line - method signature changed in PHP 5.4 $errorcode = 0; if (defined('INTL_IDNA_VARIANT_UTS46')) { //Use the current punycode standard (appeared in PHP 7.2) $punycode = idn_to_ascii( $domain, \IDNA_DEFAULT | \IDNA_USE_STD3_RULES | \IDNA_CHECK_BIDI | \IDNA_CHECK_CONTEXTJ | \IDNA_NONTRANSITIONAL_TO_ASCII, \INTL_IDNA_VARIANT_UTS46 ); } elseif (defined('INTL_IDNA_VARIANT_2003')) { //Fall back to this old, deprecated/removed encoding $punycode = idn_to_ascii($domain, $errorcode, \INTL_IDNA_VARIANT_2003); } else { //Fall back to a default we don't know about $punycode = idn_to_ascii($domain, $errorcode); } if (false !== $punycode) { return substr($address, 0, $pos) . $punycode; } } } return $address; } /** * Create a message and send it. * Uses the sending method specified by $Mailer. * * @throws Exception * * @return bool false on error - See the ErrorInfo property for details of the error */ public function send() { try { if (!$this->preSend()) { return false; } return $this->postSend(); } catch (Exception $exc) { $this->mailHeader = ''; $this->setError($exc->getMessage()); if ($this->exceptions) { throw $exc; } return false; } } /** * Prepare a message for sending. * * @throws Exception * * @return bool */ public function preSend() { if ( 'smtp' === $this->Mailer || ('mail' === $this->Mailer && (\PHP_VERSION_ID >= 80000 || stripos(PHP_OS, 'WIN') === 0)) ) { //SMTP mandates RFC-compliant line endings //and it's also used with mail() on Windows static::setLE(self::CRLF); } else { //Maintain backward compatibility with legacy Linux command line mailers static::setLE(PHP_EOL); } //Check for buggy PHP versions that add a header with an incorrect line break if ( 'mail' === $this->Mailer && ((\PHP_VERSION_ID >= 70000 && \PHP_VERSION_ID < 70017) || (\PHP_VERSION_ID >= 70100 && \PHP_VERSION_ID < 70103)) && ini_get('mail.add_x_header') === '1' && stripos(PHP_OS, 'WIN') === 0 ) { trigger_error($this->lang('buggy_php'), E_USER_WARNING); } try { $this->error_count = 0; //Reset errors $this->mailHeader = ''; //Dequeue recipient and Reply-To addresses with IDN foreach (array_merge($this->RecipientsQueue, $this->ReplyToQueue) as $params) { $params[1] = $this->punyencodeAddress($params[1]); call_user_func_array([$this, 'addAnAddress'], $params); } if (count($this->to) + count($this->cc) + count($this->bcc) < 1) { throw new Exception($this->lang('provide_address'), self::STOP_CRITICAL); } //Validate From, Sender, and ConfirmReadingTo addresses foreach (['From', 'Sender', 'ConfirmReadingTo'] as $address_kind) { $this->{$address_kind} = trim($this->{$address_kind}); if (empty($this->{$address_kind})) { continue; } $this->{$address_kind} = $this->punyencodeAddress($this->{$address_kind}); if (!static::validateAddress($this->{$address_kind})) { $error_message = sprintf( '%s (%s): %s', $this->lang('invalid_address'), $address_kind, $this->{$address_kind} ); $this->setError($error_message); $this->edebug($error_message); if ($this->exceptions) { throw new Exception($error_message); } return false; } } //Set whether the message is multipart/alternative if ($this->alternativeExists()) { $this->ContentType = static::CONTENT_TYPE_MULTIPART_ALTERNATIVE; } $this->setMessageType(); //Refuse to send an empty message unless we are specifically allowing it if (!$this->AllowEmpty && empty($this->Body)) { throw new Exception($this->lang('empty_message'), self::STOP_CRITICAL); } //Trim subject consistently $this->Subject = trim($this->Subject); //Create body before headers in case body makes changes to headers (e.g. altering transfer encoding) $this->MIMEHeader = ''; $this->MIMEBody = $this->createBody(); //createBody may have added some headers, so retain them $tempheaders = $this->MIMEHeader; $this->MIMEHeader = $this->createHeader(); $this->MIMEHeader .= $tempheaders; //To capture the complete message when using mail(), create //an extra header list which createHeader() doesn't fold in if ('mail' === $this->Mailer) { if (count($this->to) > 0) { $this->mailHeader .= $this->addrAppend('To', $this->to); } else { $this->mailHeader .= $this->headerLine('To', 'undisclosed-recipients:;'); } $this->mailHeader .= $this->headerLine( 'Subject', $this->encodeHeader($this->secureHeader($this->Subject)) ); } //Sign with DKIM if enabled if ( !empty($this->DKIM_domain) && !empty($this->DKIM_selector) && (!empty($this->DKIM_private_string) || (!empty($this->DKIM_private) && static::isPermittedPath($this->DKIM_private) && file_exists($this->DKIM_private) ) ) ) { $header_dkim = $this->DKIM_Add( $this->MIMEHeader . $this->mailHeader, $this->encodeHeader($this->secureHeader($this->Subject)), $this->MIMEBody ); $this->MIMEHeader = static::stripTrailingWSP($this->MIMEHeader) . static::$LE . static::normalizeBreaks($header_dkim) . static::$LE; } return true; } catch (Exception $exc) { $this->setError($exc->getMessage()); if ($this->exceptions) { throw $exc; } return false; } } /** * Actually send a message via the selected mechanism. * * @throws Exception * * @return bool */ public function postSend() { try { //Choose the mailer and send through it switch ($this->Mailer) { case 'sendmail': case 'qmail': return $this->sendmailSend($this->MIMEHeader, $this->MIMEBody); case 'smtp': return $this->smtpSend($this->MIMEHeader, $this->MIMEBody); case 'mail': return $this->mailSend($this->MIMEHeader, $this->MIMEBody); default: $sendMethod = $this->Mailer . 'Send'; if (method_exists($this, $sendMethod)) { return $this->{$sendMethod}($this->MIMEHeader, $this->MIMEBody); } return $this->mailSend($this->MIMEHeader, $this->MIMEBody); } } catch (Exception $exc) { if ($this->Mailer === 'smtp' && $this->SMTPKeepAlive == true) { $this->smtp->reset(); } $this->setError($exc->getMessage()); $this->edebug($exc->getMessage()); if ($this->exceptions) { throw $exc; } } return false; } /** * Send mail using the $Sendmail program. * * @see PHPMailer::$Sendmail * * @param string $header The message headers * @param string $body The message body * * @throws Exception * * @return bool */ protected function sendmailSend($header, $body) { if ($this->Mailer === 'qmail') { $this->edebug('Sending with qmail'); } else { $this->edebug('Sending with sendmail'); } $header = static::stripTrailingWSP($header) . static::$LE . static::$LE; //This sets the SMTP envelope sender which gets turned into a return-path header by the receiver //A space after `-f` is optional, but there is a long history of its presence //causing problems, so we don't use one //Exim docs: http://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_exim_command_line.html //Sendmail docs: http://www.sendmail.org/~ca/email/man/sendmail.html //Qmail docs: http://www.qmail.org/man/man8/qmail-inject.html //Example problem: https://www.drupal.org/node/1057954 //PHP 5.6 workaround $sendmail_from_value = ini_get('sendmail_from'); if (empty($this->Sender) && !empty($sendmail_from_value)) { //PHP config has a sender address we can use $this->Sender = ini_get('sendmail_from'); } //CVE-2016-10033, CVE-2016-10045: Don't pass -f if characters will be escaped. if (!empty($this->Sender) && static::validateAddress($this->Sender) && self::isShellSafe($this->Sender)) { if ($this->Mailer === 'qmail') { $sendmailFmt = '%s -f%s'; } else { $sendmailFmt = '%s -oi -f%s -t'; } } else { //allow sendmail to choose a default envelope sender. It may //seem preferable to force it to use the From header as with //SMTP, but that introduces new problems (see //<https://github.com/PHPMailer/PHPMailer/issues/2298>), and //it has historically worked this way. $sendmailFmt = '%s -oi -t'; } $sendmail = sprintf($sendmailFmt, escapeshellcmd($this->Sendmail), $this->Sender); $this->edebug('Sendmail path: ' . $this->Sendmail); $this->edebug('Sendmail command: ' . $sendmail); $this->edebug('Envelope sender: ' . $this->Sender); $this->edebug("Headers: {$header}"); if ($this->SingleTo) { foreach ($this->SingleToArray as $toAddr) { $mail = @popen($sendmail, 'w'); if (!$mail) { throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL); } $this->edebug("To: {$toAddr}"); fwrite($mail, 'To: ' . $toAddr . "\n"); fwrite($mail, $header); fwrite($mail, $body); $result = pclose($mail); $addrinfo = static::parseAddresses($toAddr, true, $this->CharSet); $this->doCallback( ($result === 0), [[$addrinfo['address'], $addrinfo['name']]], $this->cc, $this->bcc, $this->Subject, $body, $this->From, [] ); $this->edebug("Result: " . ($result === 0 ? 'true' : 'false')); if (0 !== $result) { throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL); } } } else { $mail = @popen($sendmail, 'w'); if (!$mail) { throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL); } fwrite($mail, $header); fwrite($mail, $body); $result = pclose($mail); $this->doCallback( ($result === 0), $this->to, $this->cc, $this->bcc, $this->Subject, $body, $this->From, [] ); $this->edebug("Result: " . ($result === 0 ? 'true' : 'false')); if (0 !== $result) { throw new Exception($this->lang('execute') . $this->Sendmail, self::STOP_CRITICAL); } } return true; } /** * Fix CVE-2016-10033 and CVE-2016-10045 by disallowing potentially unsafe shell characters. * Note that escapeshellarg and escapeshellcmd are inadequate for our purposes, especially on Windows. * * @see https://github.com/PHPMailer/PHPMailer/issues/924 CVE-2016-10045 bug report * * @param string $string The string to be validated * * @return bool */ protected static function isShellSafe($string) { //It's not possible to use shell commands safely (which includes the mail() function) without escapeshellarg, //but some hosting providers disable it, creating a security problem that we don't want to have to deal with, //so we don't. if (!function_exists('escapeshellarg') || !function_exists('escapeshellcmd')) { return false; } if ( escapeshellcmd($string) !== $string || !in_array(escapeshellarg($string), ["'$string'", "\"$string\""]) ) { return false; } $length = strlen($string); for ($i = 0; $i < $length; ++$i) { $c = $string[$i]; //All other characters have a special meaning in at least one common shell, including = and +. //Full stop (.) has a special meaning in cmd.exe, but its impact should be negligible here. //Note that this does permit non-Latin alphanumeric characters based on the current locale. if (!ctype_alnum($c) && strpos('@_-.', $c) === false) { return false; } } return true; } /** * Check whether a file path is of a permitted type. * Used to reject URLs and phar files from functions that access local file paths, * such as addAttachment. * * @param string $path A relative or absolute path to a file * * @return bool */ protected static function isPermittedPath($path) { //Matches scheme definition from https://tools.ietf.org/html/rfc3986#section-3.1 return !preg_match('#^[a-z][a-z\d+.-]*://#i', $path); } /** * Check whether a file path is safe, accessible, and readable. * * @param string $path A relative or absolute path to a file * * @return bool */ protected static function fileIsAccessible($path) { if (!static::isPermittedPath($path)) { return false; } $readable = file_exists($path); //If not a UNC path (expected to start with \\), check read permission, see #2069 if (strpos($path, '\\\\') !== 0) { $readable = $readable && is_readable($path); } return $readable; } /** * Send mail using the PHP mail() function. * * @see http://www.php.net/manual/en/book.mail.php * * @param string $header The message headers * @param string $body The message body * * @throws Exception * * @return bool */ protected function mailSend($header, $body) { $header = static::stripTrailingWSP($header) . static::$LE . static::$LE; $toArr = []; foreach ($this->to as $toaddr) { $toArr[] = $this->addrFormat($toaddr); } $to = implode(', ', $toArr); $params = null; //This sets the SMTP envelope sender which gets turned into a return-path header by the receiver //A space after `-f` is optional, but there is a long history of its presence //causing problems, so we don't use one //Exim docs: http://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_exim_command_line.html //Sendmail docs: http://www.sendmail.org/~ca/email/man/sendmail.html //Qmail docs: http://www.qmail.org/man/man8/qmail-inject.html //Example problem: https://www.drupal.org/node/1057954 //CVE-2016-10033, CVE-2016-10045: Don't pass -f if characters will be escaped. //PHP 5.6 workaround $sendmail_from_value = ini_get('sendmail_from'); if (empty($this->Sender) && !empty($sendmail_from_value)) { //PHP config has a sender address we can use $this->Sender = ini_get('sendmail_from'); } if (!empty($this->Sender) && static::validateAddress($this->Sender)) { if (self::isShellSafe($this->Sender)) { $params = sprintf('-f%s', $this->Sender); } $old_from = ini_get('sendmail_from'); ini_set('sendmail_from', $this->Sender); } $result = false; if ($this->SingleTo && count($toArr) > 1) { foreach ($toArr as $toAddr) { $result = $this->mailPassthru($toAddr, $this->Subject, $body, $header, $params); $addrinfo = static::parseAddresses($toAddr, true, $this->CharSet); $this->doCallback( $result, [[$addrinfo['address'], $addrinfo['name']]], $this->cc, $this->bcc, $this->Subject, $body, $this->From, [] ); } } else { $result = $this->mailPassthru($to, $this->Subject, $body, $header, $params); $this->doCallback($result, $this->to, $this->cc, $this->bcc, $this->Subject, $body, $this->From, []); } if (isset($old_from)) { ini_set('sendmail_from', $old_from); } if (!$result) { throw new Exception($this->lang('instantiate'), self::STOP_CRITICAL); } return true; } /** * Get an instance to use for SMTP operations. * Override this function to load your own SMTP implementation, * or set one with setSMTPInstance. * * @return SMTP */ public function getSMTPInstance() { if (!is_object($this->smtp)) { $this->smtp = new SMTP(); } return $this->smtp; } /** * Provide an instance to use for SMTP operations. * * @return SMTP */ public function setSMTPInstance(SMTP $smtp) { $this->smtp = $smtp; return $this->smtp; } /** * Send mail via SMTP. * Returns false if there is a bad MAIL FROM, RCPT, or DATA input. * * @see PHPMailer::setSMTPInstance() to use a different class. * * @uses \PHPMailer\PHPMailer\SMTP * * @param string $header The message headers * @param string $body The message body * * @throws Exception * * @return bool */ protected function smtpSend($header, $body) { $header = static::stripTrailingWSP($header) . static::$LE . static::$LE; $bad_rcpt = []; if (!$this->smtpConnect($this->SMTPOptions)) { throw new Exception($this->lang('smtp_connect_failed'), self::STOP_CRITICAL); } //Sender already validated in preSend() if ('' === $this->Sender) { $smtp_from = $this->From; } else { $smtp_from = $this->Sender; } if (!$this->smtp->mail($smtp_from)) { $this->setError($this->lang('from_failed') . $smtp_from . ' : ' . implode(',', $this->smtp->getError())); throw new Exception($this->ErrorInfo, self::STOP_CRITICAL); } $callbacks = []; //Attempt to send to all recipients foreach ([$this->to, $this->cc, $this->bcc] as $togroup) { foreach ($togroup as $to) { if (!$this->smtp->recipient($to[0], $this->dsn)) { $error = $this->smtp->getError(); $bad_rcpt[] = ['to' => $to[0], 'error' => $error['detail']]; $isSent = false; } else { $isSent = true; } $callbacks[] = ['issent' => $isSent, 'to' => $to[0], 'name' => $to[1]]; } } //Only send the DATA command if we have viable recipients if ((count($this->all_recipients) > count($bad_rcpt)) && !$this->smtp->data($header . $body)) { throw new Exception($this->lang('data_not_accepted'), self::STOP_CRITICAL); } $smtp_transaction_id = $this->smtp->getLastTransactionID(); if ($this->SMTPKeepAlive) { $this->smtp->reset(); } else { $this->smtp->quit(); $this->smtp->close(); } foreach ($callbacks as $cb) { $this->doCallback( $cb['issent'], [[$cb['to'], $cb['name']]], [], [], $this->Subject, $body, $this->From, ['smtp_transaction_id' => $smtp_transaction_id] ); } //Create error message for any bad addresses if (count($bad_rcpt) > 0) { $errstr = ''; foreach ($bad_rcpt as $bad) { $errstr .= $bad['to'] . ': ' . $bad['error']; } throw new Exception($this->lang('recipients_failed') . $errstr, self::STOP_CONTINUE); } return true; } /** * Initiate a connection to an SMTP server. * Returns false if the operation failed. * * @param array $options An array of options compatible with stream_context_create() * * @throws Exception * * @uses \PHPMailer\PHPMailer\SMTP * * @return bool */ public function smtpConnect($options = null) { if (null === $this->smtp) { $this->smtp = $this->getSMTPInstance(); } //If no options are provided, use whatever is set in the instance if (null === $options) { $options = $this->SMTPOptions; } //Already connected? if ($this->smtp->connected()) { return true; } $this->smtp->setTimeout($this->Timeout); $this->smtp->setDebugLevel($this->SMTPDebug); $this->smtp->setDebugOutput($this->Debugoutput); $this->smtp->setVerp($this->do_verp); $hosts = explode(';', $this->Host); $lastexception = null; foreach ($hosts as $hostentry) { $hostinfo = []; if ( !preg_match( '/^(?:(ssl|tls):\/\/)?(.+?)(?::(\d+))?$/', trim($hostentry), $hostinfo ) ) { $this->edebug($this->lang('invalid_hostentry') . ' ' . trim($hostentry)); //Not a valid host entry continue; } //$hostinfo[1]: optional ssl or tls prefix //$hostinfo[2]: the hostname //$hostinfo[3]: optional port number //The host string prefix can temporarily override the current setting for SMTPSecure //If it's not specified, the default value is used //Check the host name is a valid name or IP address before trying to use it if (!static::isValidHost($hostinfo[2])) { $this->edebug($this->lang('invalid_host') . ' ' . $hostinfo[2]); continue; } $prefix = ''; $secure = $this->SMTPSecure; $tls = (static::ENCRYPTION_STARTTLS === $this->SMTPSecure); if ('ssl' === $hostinfo[1] || ('' === $hostinfo[1] && static::ENCRYPTION_SMTPS === $this->SMTPSecure)) { $prefix = 'ssl://'; $tls = false; //Can't have SSL and TLS at the same time $secure = static::ENCRYPTION_SMTPS; } elseif ('tls' === $hostinfo[1]) { $tls = true; //TLS doesn't use a prefix $secure = static::ENCRYPTION_STARTTLS; } //Do we need the OpenSSL extension? $sslext = defined('OPENSSL_ALGO_SHA256'); if (static::ENCRYPTION_STARTTLS === $secure || static::ENCRYPTION_SMTPS === $secure) { //Check for an OpenSSL constant rather than using extension_loaded, which is sometimes disabled if (!$sslext) { throw new Exception($this->lang('extension_missing') . 'openssl', self::STOP_CRITICAL); } } $host = $hostinfo[2]; $port = $this->Port; if ( array_key_exists(3, $hostinfo) && is_numeric($hostinfo[3]) && $hostinfo[3] > 0 && $hostinfo[3] < 65536 ) { $port = (int) $hostinfo[3]; } if ($this->smtp->connect($prefix . $host, $port, $this->Timeout, $options)) { try { if ($this->Helo) { $hello = $this->Helo; } else { $hello = $this->serverHostname(); } $this->smtp->hello($hello); //Automatically enable TLS encryption if: //* it's not disabled //* we have openssl extension //* we are not already using SSL //* the server offers STARTTLS if ($this->SMTPAutoTLS && $sslext && 'ssl' !== $secure && $this->smtp->getServerExt('STARTTLS')) { $tls = true; } if ($tls) { if (!$this->smtp->startTLS()) { $message = $this->getSmtpErrorMessage('connect_host'); throw new Exception($message); } //We must resend EHLO after TLS negotiation $this->smtp->hello($hello); } if ( $this->SMTPAuth && !$this->smtp->authenticate( $this->Username, $this->Password, $this->AuthType, $this->oauth ) ) { throw new Exception($this->lang('authenticate')); } return true; } catch (Exception $exc) { $lastexception = $exc; $this->edebug($exc->getMessage()); //We must have connected, but then failed TLS or Auth, so close connection nicely $this->smtp->quit(); } } } //If we get here, all connection attempts have failed, so close connection hard $this->smtp->close(); //As we've caught all exceptions, just report whatever the last one was if ($this->exceptions && null !== $lastexception) { throw $lastexception; } if ($this->exceptions) { // no exception was thrown, likely $this->smtp->connect() failed $message = $this->getSmtpErrorMessage('connect_host'); throw new Exception($message); } return false; } /** * Close the active SMTP session if one exists. */ public function smtpClose() { if ((null !== $this->smtp) && $this->smtp->connected()) { $this->smtp->quit(); $this->smtp->close(); } } /** * Set the language for error messages. * The default language is English. * * @param string $langcode ISO 639-1 2-character language code (e.g. French is "fr") * Optionally, the language code can be enhanced with a 4-character * script annotation and/or a 2-character country annotation. * @param string $lang_path Path to the language file directory, with trailing separator (slash) * Do not set this from user input! * * @return bool Returns true if the requested language was loaded, false otherwise. */ public function setLanguage($langcode = 'en', $lang_path = '') { //Backwards compatibility for renamed language codes $renamed_langcodes = [ 'br' => 'pt_br', 'cz' => 'cs', 'dk' => 'da', 'no' => 'nb', 'se' => 'sv', 'rs' => 'sr', 'tg' => 'tl', 'am' => 'hy', ]; if (array_key_exists($langcode, $renamed_langcodes)) { $langcode = $renamed_langcodes[$langcode]; } //Define full set of translatable strings in English $PHPMAILER_LANG = [ 'authenticate' => 'SMTP Error: Could not authenticate.', 'buggy_php' => 'Your version of PHP is affected by a bug that may result in corrupted messages.' . ' To fix it, switch to sending using SMTP, disable the mail.add_x_header option in' . ' your php.ini, switch to MacOS or Linux, or upgrade your PHP to version 7.0.17+ or 7.1.3+.', 'connect_host' => 'SMTP Error: Could not connect to SMTP host.', 'data_not_accepted' => 'SMTP Error: data not accepted.', 'empty_message' => 'Message body empty', 'encoding' => 'Unknown encoding: ', 'execute' => 'Could not execute: ', 'extension_missing' => 'Extension missing: ', 'file_access' => 'Could not access file: ', 'file_open' => 'File Error: Could not open file: ', 'from_failed' => 'The following From address failed: ', 'instantiate' => 'Could not instantiate mail function.', 'invalid_address' => 'Invalid address: ', 'invalid_header' => 'Invalid header name or value', 'invalid_hostentry' => 'Invalid hostentry: ', 'invalid_host' => 'Invalid host: ', 'mailer_not_supported' => ' mailer is not supported.', 'provide_address' => 'You must provide at least one recipient email address.', 'recipients_failed' => 'SMTP Error: The following recipients failed: ', 'signing' => 'Signing Error: ', 'smtp_code' => 'SMTP code: ', 'smtp_code_ex' => 'Additional SMTP info: ', 'smtp_connect_failed' => 'SMTP connect() failed.', 'smtp_detail' => 'Detail: ', 'smtp_error' => 'SMTP server error: ', 'variable_set' => 'Cannot set or reset variable: ', ]; if (empty($lang_path)) { //Calculate an absolute path so it can work if CWD is not here $lang_path = dirname(__DIR__) . DIRECTORY_SEPARATOR . 'language' . DIRECTORY_SEPARATOR; } //Validate $langcode $foundlang = true; $langcode = strtolower($langcode); if ( !preg_match('/^(?P<lang>[a-z]{2})(?P<script>_[a-z]{4})?(?P<country>_[a-z]{2})?$/', $langcode, $matches) && $langcode !== 'en' ) { $foundlang = false; $langcode = 'en'; } //There is no English translation file if ('en' !== $langcode) { $langcodes = []; if (!empty($matches['script']) && !empty($matches['country'])) { $langcodes[] = $matches['lang'] . $matches['script'] . $matches['country']; } if (!empty($matches['country'])) { $langcodes[] = $matches['lang'] . $matches['country']; } if (!empty($matches['script'])) { $langcodes[] = $matches['lang'] . $matches['script']; } $langcodes[] = $matches['lang']; //Try and find a readable language file for the requested language. $foundFile = false; foreach ($langcodes as $code) { $lang_file = $lang_path . 'phpmailer.lang-' . $code . '.php'; if (static::fileIsAccessible($lang_file)) { $foundFile = true; break; } } if ($foundFile === false) { $foundlang = false; } else { $lines = file($lang_file); foreach ($lines as $line) { //Translation file lines look like this: //$PHPMAILER_LANG['authenticate'] = 'SMTP-Fehler: Authentifizierung fehlgeschlagen.'; //These files are parsed as text and not PHP so as to avoid the possibility of code injection //See https://blog.stevenlevithan.com/archives/match-quoted-string $matches = []; if ( preg_match( '/^\$PHPMAILER_LANG\[\'([a-z\d_]+)\'\]\s*=\s*(["\'])(.+)*?\2;/', $line, $matches ) && //Ignore unknown translation keys array_key_exists($matches[1], $PHPMAILER_LANG) ) { //Overwrite language-specific strings so we'll never have missing translation keys. $PHPMAILER_LANG[$matches[1]] = (string)$matches[3]; } } } } $this->language = $PHPMAILER_LANG; return $foundlang; //Returns false if language not found } /** * Get the array of strings for the current language. * * @return array */ public function getTranslations() { if (empty($this->language)) { $this->setLanguage(); // Set the default language. } return $this->language; } /** * Create recipient headers. * * @param string $type * @param array $addr An array of recipients, * where each recipient is a 2-element indexed array with element 0 containing an address * and element 1 containing a name, like: * [['joe@example.com', 'Joe User'], ['zoe@example.com', 'Zoe User']] * * @return string */ public function addrAppend($type, $addr) { $addresses = []; foreach ($addr as $address) { $addresses[] = $this->addrFormat($address); } return $type . ': ' . implode(', ', $addresses) . static::$LE; } /** * Format an address for use in a message header. * * @param array $addr A 2-element indexed array, element 0 containing an address, element 1 containing a name like * ['joe@example.com', 'Joe User'] * * @return string */ public function addrFormat($addr) { if (empty($addr[1])) { //No name provided return $this->secureHeader($addr[0]); } return $this->encodeHeader($this->secureHeader($addr[1]), 'phrase') . ' <' . $this->secureHeader($addr[0]) . '>'; } /** * Word-wrap message. * For use with mailers that do not automatically perform wrapping * and for quoted-printable encoded messages. * Original written by philippe. * * @param string $message The message to wrap * @param int $length The line length to wrap to * @param bool $qp_mode Whether to run in Quoted-Printable mode * * @return string */ public function wrapText($message, $length, $qp_mode = false) { if ($qp_mode) { $soft_break = sprintf(' =%s', static::$LE); } else { $soft_break = static::$LE; } //If utf-8 encoding is used, we will need to make sure we don't //split multibyte characters when we wrap $is_utf8 = static::CHARSET_UTF8 === strtolower($this->CharSet); $lelen = strlen(static::$LE); $crlflen = strlen(static::$LE); $message = static::normalizeBreaks($message); //Remove a trailing line break if (substr($message, -$lelen) === static::$LE) { $message = substr($message, 0, -$lelen); } //Split message into lines $lines = explode(static::$LE, $message); //Message will be rebuilt in here $message = ''; foreach ($lines as $line) { $words = explode(' ', $line); $buf = ''; $firstword = true; foreach ($words as $word) { if ($qp_mode && (strlen($word) > $length)) { $space_left = $length - strlen($buf) - $crlflen; if (!$firstword) { if ($space_left > 20) { $len = $space_left; if ($is_utf8) { $len = $this->utf8CharBoundary($word, $len); } elseif ('=' === substr($word, $len - 1, 1)) { --$len; } elseif ('=' === substr($word, $len - 2, 1)) { $len -= 2; } $part = substr($word, 0, $len); $word = substr($word, $len); $buf .= ' ' . $part; $message .= $buf . sprintf('=%s', static::$LE); } else { $message .= $buf . $soft_break; } $buf = ''; } while ($word !== '') { if ($length <= 0) { break; } $len = $length; if ($is_utf8) { $len = $this->utf8CharBoundary($word, $len); } elseif ('=' === substr($word, $len - 1, 1)) { --$len; } elseif ('=' === substr($word, $len - 2, 1)) { $len -= 2; } $part = substr($word, 0, $len); $word = (string) substr($word, $len); if ($word !== '') { $message .= $part . sprintf('=%s', static::$LE); } else { $buf = $part; } } } else { $buf_o = $buf; if (!$firstword) { $buf .= ' '; } $buf .= $word; if ('' !== $buf_o && strlen($buf) > $length) { $message .= $buf_o . $soft_break; $buf = $word; } } $firstword = false; } $message .= $buf . static::$LE; } return $message; } /** * Find the last character boundary prior to $maxLength in a utf-8 * quoted-printable encoded string. * Original written by Colin Brown. * * @param string $encodedText utf-8 QP text * @param int $maxLength Find the last character boundary prior to this length * * @return int */ public function utf8CharBoundary($encodedText, $maxLength) { $foundSplitPos = false; $lookBack = 3; while (!$foundSplitPos) { $lastChunk = substr($encodedText, $maxLength - $lookBack, $lookBack); $encodedCharPos = strpos($lastChunk, '='); if (false !== $encodedCharPos) { //Found start of encoded character byte within $lookBack block. //Check the encoded byte value (the 2 chars after the '=') $hex = substr($encodedText, $maxLength - $lookBack + $encodedCharPos + 1, 2); $dec = hexdec($hex); if ($dec < 128) { //Single byte character. //If the encoded char was found at pos 0, it will fit //otherwise reduce maxLength to start of the encoded char if ($encodedCharPos > 0) { $maxLength -= $lookBack - $encodedCharPos; } $foundSplitPos = true; } elseif ($dec >= 192) { //First byte of a multi byte character //Reduce maxLength to split at start of character $maxLength -= $lookBack - $encodedCharPos; $foundSplitPos = true; } elseif ($dec < 192) { //Middle byte of a multi byte character, look further back $lookBack += 3; } } else { //No encoded character found $foundSplitPos = true; } } return $maxLength; } /** * Apply word wrapping to the message body. * Wraps the message body to the number of chars set in the WordWrap property. * You should only do this to plain-text bodies as wrapping HTML tags may break them. * This is called automatically by createBody(), so you don't need to call it yourself. */ public function setWordWrap() { if ($this->WordWrap < 1) { return; } switch ($this->message_type) { case 'alt': case 'alt_inline': case 'alt_attach': case 'alt_inline_attach': $this->AltBody = $this->wrapText($this->AltBody, $this->WordWrap); break; default: $this->Body = $this->wrapText($this->Body, $this->WordWrap); break; } } /** * Assemble message headers. * * @return string The assembled headers */ public function createHeader() { $result = ''; $result .= $this->headerLine('Date', '' === $this->MessageDate ? self::rfcDate() : $this->MessageDate); //The To header is created automatically by mail(), so needs to be omitted here if ('mail' !== $this->Mailer) { if ($this->SingleTo) { foreach ($this->to as $toaddr) { $this->SingleToArray[] = $this->addrFormat($toaddr); } } elseif (count($this->to) > 0) { $result .= $this->addrAppend('To', $this->to); } elseif (count($this->cc) === 0) { $result .= $this->headerLine('To', 'undisclosed-recipients:;'); } } $result .= $this->addrAppend('From', [[trim($this->From), $this->FromName]]); //sendmail and mail() extract Cc from the header before sending if (count($this->cc) > 0) { $result .= $this->addrAppend('Cc', $this->cc); } //sendmail and mail() extract Bcc from the header before sending if ( ( 'sendmail' === $this->Mailer || 'qmail' === $this->Mailer || 'mail' === $this->Mailer ) && count($this->bcc) > 0 ) { $result .= $this->addrAppend('Bcc', $this->bcc); } if (count($this->ReplyTo) > 0) { $result .= $this->addrAppend('Reply-To', $this->ReplyTo); } //mail() sets the subject itself if ('mail' !== $this->Mailer) { $result .= $this->headerLine('Subject', $this->encodeHeader($this->secureHeader($this->Subject))); } //Only allow a custom message ID if it conforms to RFC 5322 section 3.6.4 //https://tools.ietf.org/html/rfc5322#section-3.6.4 if ( '' !== $this->MessageID && preg_match( '/^<((([a-z\d!#$%&\'*+\/=?^_`{|}~-]+(\.[a-z\d!#$%&\'*+\/=?^_`{|}~-]+)*)' . '|("(([\x01-\x08\x0B\x0C\x0E-\x1F\x7F]|[\x21\x23-\x5B\x5D-\x7E])' . '|(\\[\x01-\x09\x0B\x0C\x0E-\x7F]))*"))@(([a-z\d!#$%&\'*+\/=?^_`{|}~-]+' . '(\.[a-z\d!#$%&\'*+\/=?^_`{|}~-]+)*)|(\[(([\x01-\x08\x0B\x0C\x0E-\x1F\x7F]' . '|[\x21-\x5A\x5E-\x7E])|(\\[\x01-\x09\x0B\x0C\x0E-\x7F]))*\])))>$/Di', $this->MessageID ) ) { $this->lastMessageID = $this->MessageID; } else { $this->lastMessageID = sprintf('<%s@%s>', $this->uniqueid, $this->serverHostname()); } $result .= $this->headerLine('Message-ID', $this->lastMessageID); if (null !== $this->Priority) { $result .= $this->headerLine('X-Priority', $this->Priority); } if ('' === $this->XMailer) { //Empty string for default X-Mailer header $result .= $this->headerLine( 'X-Mailer', 'PHPMailer ' . self::VERSION . ' (https://github.com/PHPMailer/PHPMailer)' ); } elseif (is_string($this->XMailer) && trim($this->XMailer) !== '') { //Some string $result .= $this->headerLine('X-Mailer', trim($this->XMailer)); } //Other values result in no X-Mailer header if ('' !== $this->ConfirmReadingTo) { $result .= $this->headerLine('Disposition-Notification-To', '<' . $this->ConfirmReadingTo . '>'); } //Add custom headers foreach ($this->CustomHeader as $header) { $result .= $this->headerLine( trim($header[0]), $this->encodeHeader(trim($header[1])) ); } if (!$this->sign_key_file) { $result .= $this->headerLine('MIME-Version', '1.0'); $result .= $this->getMailMIME(); } return $result; } /** * Get the message MIME type headers. * * @return string */ public function getMailMIME() { $result = ''; $ismultipart = true; switch ($this->message_type) { case 'inline': $result .= $this->headerLine('Content-Type', static::CONTENT_TYPE_MULTIPART_RELATED . ';'); $result .= $this->textLine(' boundary="' . $this->boundary[1] . '"'); break; case 'attach': case 'inline_attach': case 'alt_attach': case 'alt_inline_attach': $result .= $this->headerLine('Content-Type', static::CONTENT_TYPE_MULTIPART_MIXED . ';'); $result .= $this->textLine(' boundary="' . $this->boundary[1] . '"'); break; case 'alt': case 'alt_inline': $result .= $this->headerLine('Content-Type', static::CONTENT_TYPE_MULTIPART_ALTERNATIVE . ';'); $result .= $this->textLine(' boundary="' . $this->boundary[1] . '"'); break; default: //Catches case 'plain': and case '': $result .= $this->textLine('Content-Type: ' . $this->ContentType . '; charset=' . $this->CharSet); $ismultipart = false; break; } //RFC1341 part 5 says 7bit is assumed if not specified if (static::ENCODING_7BIT !== $this->Encoding) { //RFC 2045 section 6.4 says multipart MIME parts may only use 7bit, 8bit or binary CTE if ($ismultipart) { if (static::ENCODING_8BIT === $this->Encoding) { $result .= $this->headerLine('Content-Transfer-Encoding', static::ENCODING_8BIT); } //The only remaining alternatives are quoted-printable and base64, which are both 7bit compatible } else { $result .= $this->headerLine('Content-Transfer-Encoding', $this->Encoding); } } return $result; } /** * Returns the whole MIME message. * Includes complete headers and body. * Only valid post preSend(). * * @see PHPMailer::preSend() * * @return string */ public function getSentMIMEMessage() { return static::stripTrailingWSP($this->MIMEHeader . $this->mailHeader) . static::$LE . static::$LE . $this->MIMEBody; } /** * Create a unique ID to use for boundaries. * * @return string */ protected function generateId() { $len = 32; //32 bytes = 256 bits $bytes = ''; if (function_exists('random_bytes')) { try { $bytes = random_bytes($len); } catch (\Exception $e) { //Do nothing } } elseif (function_exists('openssl_random_pseudo_bytes')) { /** @noinspection CryptographicallySecureRandomnessInspection */ $bytes = openssl_random_pseudo_bytes($len); } if ($bytes === '') { //We failed to produce a proper random string, so make do. //Use a hash to force the length to the same as the other methods $bytes = hash('sha256', uniqid((string) mt_rand(), true), true); } //We don't care about messing up base64 format here, just want a random string return str_replace(['=', '+', '/'], '', base64_encode(hash('sha256', $bytes, true))); } /** * Assemble the message body. * Returns an empty string on failure. * * @throws Exception * * @return string The assembled message body */ public function createBody() { $body = ''; //Create unique IDs and preset boundaries $this->uniqueid = $this->generateId(); $this->boundary[1] = 'b1_' . $this->uniqueid; $this->boundary[2] = 'b2_' . $this->uniqueid; $this->boundary[3] = 'b3_' . $this->uniqueid; if ($this->sign_key_file) { $body .= $this->getMailMIME() . static::$LE; } $this->setWordWrap(); $bodyEncoding = $this->Encoding; $bodyCharSet = $this->CharSet; //Can we do a 7-bit downgrade? if (static::ENCODING_8BIT === $bodyEncoding && !$this->has8bitChars($this->Body)) { $bodyEncoding = static::ENCODING_7BIT; //All ISO 8859, Windows codepage and UTF-8 charsets are ascii compatible up to 7-bit $bodyCharSet = static::CHARSET_ASCII; } //If lines are too long, and we're not already using an encoding that will shorten them, //change to quoted-printable transfer encoding for the body part only if (static::ENCODING_BASE64 !== $this->Encoding && static::hasLineLongerThanMax($this->Body)) { $bodyEncoding = static::ENCODING_QUOTED_PRINTABLE; } $altBodyEncoding = $this->Encoding; $altBodyCharSet = $this->CharSet; //Can we do a 7-bit downgrade? if (static::ENCODING_8BIT === $altBodyEncoding && !$this->has8bitChars($this->AltBody)) { $altBodyEncoding = static::ENCODING_7BIT; //All ISO 8859, Windows codepage and UTF-8 charsets are ascii compatible up to 7-bit $altBodyCharSet = static::CHARSET_ASCII; } //If lines are too long, and we're not already using an encoding that will shorten them, //change to quoted-printable transfer encoding for the alt body part only if (static::ENCODING_BASE64 !== $altBodyEncoding && static::hasLineLongerThanMax($this->AltBody)) { $altBodyEncoding = static::ENCODING_QUOTED_PRINTABLE; } //Use this as a preamble in all multipart message types $mimepre = 'This is a multi-part message in MIME format.' . static::$LE . static::$LE; switch ($this->message_type) { case 'inline': $body .= $mimepre; $body .= $this->getBoundary($this->boundary[1], $bodyCharSet, '', $bodyEncoding); $body .= $this->encodeString($this->Body, $bodyEncoding); $body .= static::$LE; $body .= $this->attachAll('inline', $this->boundary[1]); break; case 'attach': $body .= $mimepre; $body .= $this->getBoundary($this->boundary[1], $bodyCharSet, '', $bodyEncoding); $body .= $this->encodeString($this->Body, $bodyEncoding); $body .= static::$LE; $body .= $this->attachAll('attachment', $this->boundary[1]); break; case 'inline_attach': $body .= $mimepre; $body .= $this->textLine('--' . $this->boundary[1]); $body .= $this->headerLine('Content-Type', static::CONTENT_TYPE_MULTIPART_RELATED . ';'); $body .= $this->textLine(' boundary="' . $this->boundary[2] . '";'); $body .= $this->textLine(' type="' . static::CONTENT_TYPE_TEXT_HTML . '"'); $body .= static::$LE; $body .= $this->getBoundary($this->boundary[2], $bodyCharSet, '', $bodyEncoding); $body .= $this->encodeString($this->Body, $bodyEncoding); $body .= static::$LE; $body .= $this->attachAll('inline', $this->boundary[2]); $body .= static::$LE; $body .= $this->attachAll('attachment', $this->boundary[1]); break; case 'alt': $body .= $mimepre; $body .= $this->getBoundary( $this->boundary[1], $altBodyCharSet, static::CONTENT_TYPE_PLAINTEXT, $altBodyEncoding ); $body .= $this->encodeString($this->AltBody, $altBodyEncoding); $body .= static::$LE; $body .= $this->getBoundary( $this->boundary[1], $bodyCharSet, static::CONTENT_TYPE_TEXT_HTML, $bodyEncoding ); $body .= $this->encodeString($this->Body, $bodyEncoding); $body .= static::$LE; if (!empty($this->Ical)) { $method = static::ICAL_METHOD_REQUEST; foreach (static::$IcalMethods as $imethod) { if (stripos($this->Ical, 'METHOD:' . $imethod) !== false) { $method = $imethod; break; } } $body .= $this->getBoundary( $this->boundary[1], '', static::CONTENT_TYPE_TEXT_CALENDAR . '; method=' . $method, '' ); $body .= $this->encodeString($this->Ical, $this->Encoding); $body .= static::$LE; } $body .= $this->endBoundary($this->boundary[1]); break; case 'alt_inline': $body .= $mimepre; $body .= $this->getBoundary( $this->boundary[1], $altBodyCharSet, static::CONTENT_TYPE_PLAINTEXT, $altBodyEncoding ); $body .= $this->encodeString($this->AltBody, $altBodyEncoding); $body .= static::$LE; $body .= $this->textLine('--' . $this->boundary[1]); $body .= $this->headerLine('Content-Type', static::CONTENT_TYPE_MULTIPART_RELATED . ';'); $body .= $this->textLine(' boundary="' . $this->boundary[2] . '";'); $body .= $this->textLine(' type="' . static::CONTENT_TYPE_TEXT_HTML . '"'); $body .= static::$LE; $body .= $this->getBoundary( $this->boundary[2], $bodyCharSet, static::CONTENT_TYPE_TEXT_HTML, $bodyEncoding ); $body .= $this->encodeString($this->Body, $bodyEncoding); $body .= static::$LE; $body .= $this->attachAll('inline', $this->boundary[2]); $body .= static::$LE; $body .= $this->endBoundary($this->boundary[1]); break; case 'alt_attach': $body .= $mimepre; $body .= $this->textLine('--' . $this->boundary[1]); $body .= $this->headerLine('Content-Type', static::CONTENT_TYPE_MULTIPART_ALTERNATIVE . ';'); $body .= $this->textLine(' boundary="' . $this->boundary[2] . '"'); $body .= static::$LE; $body .= $this->getBoundary( $this->boundary[2], $altBodyCharSet, static::CONTENT_TYPE_PLAINTEXT, $altBodyEncoding ); $body .= $this->encodeString($this->AltBody, $altBodyEncoding); $body .= static::$LE; $body .= $this->getBoundary( $this->boundary[2], $bodyCharSet, static::CONTENT_TYPE_TEXT_HTML, $bodyEncoding ); $body .= $this->encodeString($this->Body, $bodyEncoding); $body .= static::$LE; if (!empty($this->Ical)) { $method = static::ICAL_METHOD_REQUEST; foreach (static::$IcalMethods as $imethod) { if (stripos($this->Ical, 'METHOD:' . $imethod) !== false) { $method = $imethod; break; } } $body .= $this->getBoundary( $this->boundary[2], '', static::CONTENT_TYPE_TEXT_CALENDAR . '; method=' . $method, '' ); $body .= $this->encodeString($this->Ical, $this->Encoding); } $body .= $this->endBoundary($this->boundary[2]); $body .= static::$LE; $body .= $this->attachAll('attachment', $this->boundary[1]); break; case 'alt_inline_attach': $body .= $mimepre; $body .= $this->textLine('--' . $this->boundary[1]); $body .= $this->headerLine('Content-Type', static::CONTENT_TYPE_MULTIPART_ALTERNATIVE . ';'); $body .= $this->textLine(' boundary="' . $this->boundary[2] . '"'); $body .= static::$LE; $body .= $this->getBoundary( $this->boundary[2], $altBodyCharSet, static::CONTENT_TYPE_PLAINTEXT, $altBodyEncoding ); $body .= $this->encodeString($this->AltBody, $altBodyEncoding); $body .= static::$LE; $body .= $this->textLine('--' . $this->boundary[2]); $body .= $this->headerLine('Content-Type', static::CONTENT_TYPE_MULTIPART_RELATED . ';'); $body .= $this->textLine(' boundary="' . $this->boundary[3] . '";'); $body .= $this->textLine(' type="' . static::CONTENT_TYPE_TEXT_HTML . '"'); $body .= static::$LE; $body .= $this->getBoundary( $this->boundary[3], $bodyCharSet, static::CONTENT_TYPE_TEXT_HTML, $bodyEncoding ); $body .= $this->encodeString($this->Body, $bodyEncoding); $body .= static::$LE; $body .= $this->attachAll('inline', $this->boundary[3]); $body .= static::$LE; $body .= $this->endBoundary($this->boundary[2]); $body .= static::$LE; $body .= $this->attachAll('attachment', $this->boundary[1]); break; default: //Catch case 'plain' and case '', applies to simple `text/plain` and `text/html` body content types //Reset the `Encoding` property in case we changed it for line length reasons $this->Encoding = $bodyEncoding; $body .= $this->encodeString($this->Body, $this->Encoding); break; } if ($this->isError()) { $body = ''; if ($this->exceptions) { throw new Exception($this->lang('empty_message'), self::STOP_CRITICAL); } } elseif ($this->sign_key_file) { try { if (!defined('PKCS7_TEXT')) { throw new Exception($this->lang('extension_missing') . 'openssl'); } $file = tempnam(sys_get_temp_dir(), 'srcsign'); $signed = tempnam(sys_get_temp_dir(), 'mailsign'); file_put_contents($file, $body); //Workaround for PHP bug https://bugs.php.net/bug.php?id=69197 if (empty($this->sign_extracerts_file)) { $sign = @openssl_pkcs7_sign( $file, $signed, 'file://' . realpath($this->sign_cert_file), ['file://' . realpath($this->sign_key_file), $this->sign_key_pass], [] ); } else { $sign = @openssl_pkcs7_sign( $file, $signed, 'file://' . realpath($this->sign_cert_file), ['file://' . realpath($this->sign_key_file), $this->sign_key_pass], [], PKCS7_DETACHED, $this->sign_extracerts_file ); } @unlink($file); if ($sign) { $body = file_get_contents($signed); @unlink($signed); //The message returned by openssl contains both headers and body, so need to split them up $parts = explode("\n\n", $body, 2); $this->MIMEHeader .= $parts[0] . static::$LE . static::$LE; $body = $parts[1]; } else { @unlink($signed); throw new Exception($this->lang('signing') . openssl_error_string()); } } catch (Exception $exc) { $body = ''; if ($this->exceptions) { throw $exc; } } } return $body; } /** * Return the start of a message boundary. * * @param string $boundary * @param string $charSet * @param string $contentType * @param string $encoding * * @return string */ protected function getBoundary($boundary, $charSet, $contentType, $encoding) { $result = ''; if ('' === $charSet) { $charSet = $this->CharSet; } if ('' === $contentType) { $contentType = $this->ContentType; } if ('' === $encoding) { $encoding = $this->Encoding; } $result .= $this->textLine('--' . $boundary); $result .= sprintf('Content-Type: %s; charset=%s', $contentType, $charSet); $result .= static::$LE; //RFC1341 part 5 says 7bit is assumed if not specified if (static::ENCODING_7BIT !== $encoding) { $result .= $this->headerLine('Content-Transfer-Encoding', $encoding); } $result .= static::$LE; return $result; } /** * Return the end of a message boundary. * * @param string $boundary * * @return string */ protected function endBoundary($boundary) { return static::$LE . '--' . $boundary . '--' . static::$LE; } /** * Set the message type. * PHPMailer only supports some preset message types, not arbitrary MIME structures. */ protected function setMessageType() { $type = []; if ($this->alternativeExists()) { $type[] = 'alt'; } if ($this->inlineImageExists()) { $type[] = 'inline'; } if ($this->attachmentExists()) { $type[] = 'attach'; } $this->message_type = implode('_', $type); if ('' === $this->message_type) { //The 'plain' message_type refers to the message having a single body element, not that it is plain-text $this->message_type = 'plain'; } } /** * Format a header line. * * @param string $name * @param string|int $value * * @return string */ public function headerLine($name, $value) { return $name . ': ' . $value . static::$LE; } /** * Return a formatted mail line. * * @param string $value * * @return string */ public function textLine($value) { return $value . static::$LE; } /** * Add an attachment from a path on the filesystem. * Never use a user-supplied path to a file! * Returns false if the file could not be found or read. * Explicitly *does not* support passing URLs; PHPMailer is not an HTTP client. * If you need to do that, fetch the resource yourself and pass it in via a local file or string. * * @param string $path Path to the attachment * @param string $name Overrides the attachment name * @param string $encoding File encoding (see $Encoding) * @param string $type MIME type, e.g. `image/jpeg`; determined automatically from $path if not specified * @param string $disposition Disposition to use * * @throws Exception * * @return bool */ public function addAttachment( $path, $name = '', $encoding = self::ENCODING_BASE64, $type = '', $disposition = 'attachment' ) { try { if (!static::fileIsAccessible($path)) { throw new Exception($this->lang('file_access') . $path, self::STOP_CONTINUE); } //If a MIME type is not specified, try to work it out from the file name if ('' === $type) { $type = static::filenameToType($path); } $filename = (string) static::mb_pathinfo($path, PATHINFO_BASENAME); if ('' === $name) { $name = $filename; } if (!$this->validateEncoding($encoding)) { throw new Exception($this->lang('encoding') . $encoding); } $this->attachment[] = [ 0 => $path, 1 => $filename, 2 => $name, 3 => $encoding, 4 => $type, 5 => false, //isStringAttachment 6 => $disposition, 7 => $name, ]; } catch (Exception $exc) { $this->setError($exc->getMessage()); $this->edebug($exc->getMessage()); if ($this->exceptions) { throw $exc; } return false; } return true; } /** * Return the array of attachments. * * @return array */ public function getAttachments() { return $this->attachment; } /** * Attach all file, string, and binary attachments to the message. * Returns an empty string on failure. * * @param string $disposition_type * @param string $boundary * * @throws Exception * * @return string */ protected function attachAll($disposition_type, $boundary) { //Return text of body $mime = []; $cidUniq = []; $incl = []; //Add all attachments foreach ($this->attachment as $attachment) { //Check if it is a valid disposition_filter if ($attachment[6] === $disposition_type) { //Check for string attachment $string = ''; $path = ''; $bString = $attachment[5]; if ($bString) { $string = $attachment[0]; } else { $path = $attachment[0]; } $inclhash = hash('sha256', serialize($attachment)); if (in_array($inclhash, $incl, true)) { continue; } $incl[] = $inclhash; $name = $attachment[2]; $encoding = $attachment[3]; $type = $attachment[4]; $disposition = $attachment[6]; $cid = $attachment[7]; if ('inline' === $disposition && array_key_exists($cid, $cidUniq)) { continue; } $cidUniq[$cid] = true; $mime[] = sprintf('--%s%s', $boundary, static::$LE); //Only include a filename property if we have one if (!empty($name)) { $mime[] = sprintf( 'Content-Type: %s; name=%s%s', $type, static::quotedString($this->encodeHeader($this->secureHeader($name))), static::$LE ); } else { $mime[] = sprintf( 'Content-Type: %s%s', $type, static::$LE ); } //RFC1341 part 5 says 7bit is assumed if not specified if (static::ENCODING_7BIT !== $encoding) { $mime[] = sprintf('Content-Transfer-Encoding: %s%s', $encoding, static::$LE); } //Only set Content-IDs on inline attachments if ((string) $cid !== '' && $disposition === 'inline') { $mime[] = 'Content-ID: <' . $this->encodeHeader($this->secureHeader($cid)) . '>' . static::$LE; } //Allow for bypassing the Content-Disposition header if (!empty($disposition)) { $encoded_name = $this->encodeHeader($this->secureHeader($name)); if (!empty($encoded_name)) { $mime[] = sprintf( 'Content-Disposition: %s; filename=%s%s', $disposition, static::quotedString($encoded_name), static::$LE . static::$LE ); } else { $mime[] = sprintf( 'Content-Disposition: %s%s', $disposition, static::$LE . static::$LE ); } } else { $mime[] = static::$LE; } //Encode as string attachment if ($bString) { $mime[] = $this->encodeString($string, $encoding); } else { $mime[] = $this->encodeFile($path, $encoding); } if ($this->isError()) { return ''; } $mime[] = static::$LE; } } $mime[] = sprintf('--%s--%s', $boundary, static::$LE); return implode('', $mime); } /** * Encode a file attachment in requested format. * Returns an empty string on failure. * * @param string $path The full path to the file * @param string $encoding The encoding to use; one of 'base64', '7bit', '8bit', 'binary', 'quoted-printable' * * @return string */ protected function encodeFile($path, $encoding = self::ENCODING_BASE64) { try { if (!static::fileIsAccessible($path)) { throw new Exception($this->lang('file_open') . $path, self::STOP_CONTINUE); } $file_buffer = file_get_contents($path); if (false === $file_buffer) { throw new Exception($this->lang('file_open') . $path, self::STOP_CONTINUE); } $file_buffer = $this->encodeString($file_buffer, $encoding); return $file_buffer; } catch (Exception $exc) { $this->setError($exc->getMessage()); $this->edebug($exc->getMessage()); if ($this->exceptions) { throw $exc; } return ''; } } /** * Encode a string in requested format. * Returns an empty string on failure. * * @param string $str The text to encode * @param string $encoding The encoding to use; one of 'base64', '7bit', '8bit', 'binary', 'quoted-printable' * * @throws Exception * * @return string */ public function encodeString($str, $encoding = self::ENCODING_BASE64) { $encoded = ''; switch (strtolower($encoding)) { case static::ENCODING_BASE64: $encoded = chunk_split( base64_encode($str), static::STD_LINE_LENGTH, static::$LE ); break; case static::ENCODING_7BIT: case static::ENCODING_8BIT: $encoded = static::normalizeBreaks($str); //Make sure it ends with a line break if (substr($encoded, -(strlen(static::$LE))) !== static::$LE) { $encoded .= static::$LE; } break; case static::ENCODING_BINARY: $encoded = $str; break; case static::ENCODING_QUOTED_PRINTABLE: $encoded = $this->encodeQP($str); break; default: $this->setError($this->lang('encoding') . $encoding); if ($this->exceptions) { throw new Exception($this->lang('encoding') . $encoding); } break; } return $encoded; } /** * Encode a header value (not including its label) optimally. * Picks shortest of Q, B, or none. Result includes folding if needed. * See RFC822 definitions for phrase, comment and text positions. * * @param string $str The header value to encode * @param string $position What context the string will be used in * * @return string */ public function encodeHeader($str, $position = 'text') { $matchcount = 0; switch (strtolower($position)) { case 'phrase': if (!preg_match('/[\200-\377]/', $str)) { //Can't use addslashes as we don't know the value of magic_quotes_sybase $encoded = addcslashes($str, "\0..\37\177\\\""); if (($str === $encoded) && !preg_match('/[^A-Za-z0-9!#$%&\'*+\/=?^_`{|}~ -]/', $str)) { return $encoded; } return "\"$encoded\""; } $matchcount = preg_match_all('/[^\040\041\043-\133\135-\176]/', $str, $matches); break; /* @noinspection PhpMissingBreakStatementInspection */ case 'comment': $matchcount = preg_match_all('/[()"]/', $str, $matches); //fallthrough case 'text': default: $matchcount += preg_match_all('/[\000-\010\013\014\016-\037\177-\377]/', $str, $matches); break; } if ($this->has8bitChars($str)) { $charset = $this->CharSet; } else { $charset = static::CHARSET_ASCII; } //Q/B encoding adds 8 chars and the charset ("` =?<charset>?[QB]?<content>?=`"). $overhead = 8 + strlen($charset); if ('mail' === $this->Mailer) { $maxlen = static::MAIL_MAX_LINE_LENGTH - $overhead; } else { $maxlen = static::MAX_LINE_LENGTH - $overhead; } //Select the encoding that produces the shortest output and/or prevents corruption. if ($matchcount > strlen($str) / 3) { //More than 1/3 of the content needs encoding, use B-encode. $encoding = 'B'; } elseif ($matchcount > 0) { //Less than 1/3 of the content needs encoding, use Q-encode. $encoding = 'Q'; } elseif (strlen($str) > $maxlen) { //No encoding needed, but value exceeds max line length, use Q-encode to prevent corruption. $encoding = 'Q'; } else { //No reformatting needed $encoding = false; } switch ($encoding) { case 'B': if ($this->hasMultiBytes($str)) { //Use a custom function which correctly encodes and wraps long //multibyte strings without breaking lines within a character $encoded = $this->base64EncodeWrapMB($str, "\n"); } else { $encoded = base64_encode($str); $maxlen -= $maxlen % 4; $encoded = trim(chunk_split($encoded, $maxlen, "\n")); } $encoded = preg_replace('/^(.*)$/m', ' =?' . $charset . "?$encoding?\\1?=", $encoded); break; case 'Q': $encoded = $this->encodeQ($str, $position); $encoded = $this->wrapText($encoded, $maxlen, true); $encoded = str_replace('=' . static::$LE, "\n", trim($encoded)); $encoded = preg_replace('/^(.*)$/m', ' =?' . $charset . "?$encoding?\\1?=", $encoded); break; default: return $str; } return trim(static::normalizeBreaks($encoded)); } /** * Check if a string contains multi-byte characters. * * @param string $str multi-byte text to wrap encode * * @return bool */ public function hasMultiBytes($str) { if (function_exists('mb_strlen')) { return strlen($str) > mb_strlen($str, $this->CharSet); } //Assume no multibytes (we can't handle without mbstring functions anyway) return false; } /** * Does a string contain any 8-bit chars (in any charset)? * * @param string $text * * @return bool */ public function has8bitChars($text) { return (bool) preg_match('/[\x80-\xFF]/', $text); } /** * Encode and wrap long multibyte strings for mail headers * without breaking lines within a character. * Adapted from a function by paravoid. * * @see http://www.php.net/manual/en/function.mb-encode-mimeheader.php#60283 * * @param string $str multi-byte text to wrap encode * @param string $linebreak string to use as linefeed/end-of-line * * @return string */ public function base64EncodeWrapMB($str, $linebreak = null) { $start = '=?' . $this->CharSet . '?B?'; $end = '?='; $encoded = ''; if (null === $linebreak) { $linebreak = static::$LE; } $mb_length = mb_strlen($str, $this->CharSet); //Each line must have length <= 75, including $start and $end $length = 75 - strlen($start) - strlen($end); //Average multi-byte ratio $ratio = $mb_length / strlen($str); //Base64 has a 4:3 ratio $avgLength = floor($length * $ratio * .75); $offset = 0; for ($i = 0; $i < $mb_length; $i += $offset) { $lookBack = 0; do { $offset = $avgLength - $lookBack; $chunk = mb_substr($str, $i, $offset, $this->CharSet); $chunk = base64_encode($chunk); ++$lookBack; } while (strlen($chunk) > $length); $encoded .= $chunk . $linebreak; } //Chomp the last linefeed return substr($encoded, 0, -strlen($linebreak)); } /** * Encode a string in quoted-printable format. * According to RFC2045 section 6.7. * * @param string $string The text to encode * * @return string */ public function encodeQP($string) { return static::normalizeBreaks(quoted_printable_encode($string)); } /** * Encode a string using Q encoding. * * @see http://tools.ietf.org/html/rfc2047#section-4.2 * * @param string $str the text to encode * @param string $position Where the text is going to be used, see the RFC for what that means * * @return string */ public function encodeQ($str, $position = 'text') { //There should not be any EOL in the string $pattern = ''; $encoded = str_replace(["\r", "\n"], '', $str); switch (strtolower($position)) { case 'phrase': //RFC 2047 section 5.3 $pattern = '^A-Za-z0-9!*+\/ -'; break; /* * RFC 2047 section 5.2. * Build $pattern without including delimiters and [] */ /* @noinspection PhpMissingBreakStatementInspection */ case 'comment': $pattern = '\(\)"'; /* Intentional fall through */ case 'text': default: //RFC 2047 section 5.1 //Replace every high ascii, control, =, ? and _ characters $pattern = '\000-\011\013\014\016-\037\075\077\137\177-\377' . $pattern; break; } $matches = []; if (preg_match_all("/[{$pattern}]/", $encoded, $matches)) { //If the string contains an '=', make sure it's the first thing we replace //so as to avoid double-encoding $eqkey = array_search('=', $matches[0], true); if (false !== $eqkey) { unset($matches[0][$eqkey]); array_unshift($matches[0], '='); } foreach (array_unique($matches[0]) as $char) { $encoded = str_replace($char, '=' . sprintf('%02X', ord($char)), $encoded); } } //Replace spaces with _ (more readable than =20) //RFC 2047 section 4.2(2) return str_replace(' ', '_', $encoded); } /** * Add a string or binary attachment (non-filesystem). * This method can be used to attach ascii or binary data, * such as a BLOB record from a database. * * @param string $string String attachment data * @param string $filename Name of the attachment * @param string $encoding File encoding (see $Encoding) * @param string $type File extension (MIME) type * @param string $disposition Disposition to use * * @throws Exception * * @return bool True on successfully adding an attachment */ public function addStringAttachment( $string, $filename, $encoding = self::ENCODING_BASE64, $type = '', $disposition = 'attachment' ) { try { //If a MIME type is not specified, try to work it out from the file name if ('' === $type) { $type = static::filenameToType($filename); } if (!$this->validateEncoding($encoding)) { throw new Exception($this->lang('encoding') . $encoding); } //Append to $attachment array $this->attachment[] = [ 0 => $string, 1 => $filename, 2 => static::mb_pathinfo($filename, PATHINFO_BASENAME), 3 => $encoding, 4 => $type, 5 => true, //isStringAttachment 6 => $disposition, 7 => 0, ]; } catch (Exception $exc) { $this->setError($exc->getMessage()); $this->edebug($exc->getMessage()); if ($this->exceptions) { throw $exc; } return false; } return true; } /** * Add an embedded (inline) attachment from a file. * This can include images, sounds, and just about any other document type. * These differ from 'regular' attachments in that they are intended to be * displayed inline with the message, not just attached for download. * This is used in HTML messages that embed the images * the HTML refers to using the `$cid` value in `img` tags, for example `<img src="cid:mylogo">`. * Never use a user-supplied path to a file! * * @param string $path Path to the attachment * @param string $cid Content ID of the attachment; Use this to reference * the content when using an embedded image in HTML * @param string $name Overrides the attachment filename * @param string $encoding File encoding (see $Encoding) defaults to `base64` * @param string $type File MIME type (by default mapped from the `$path` filename's extension) * @param string $disposition Disposition to use: `inline` (default) or `attachment` * (unlikely you want this – {@see `addAttachment()`} instead) * * @return bool True on successfully adding an attachment * @throws Exception * */ public function addEmbeddedImage( $path, $cid, $name = '', $encoding = self::ENCODING_BASE64, $type = '', $disposition = 'inline' ) { try { if (!static::fileIsAccessible($path)) { throw new Exception($this->lang('file_access') . $path, self::STOP_CONTINUE); } //If a MIME type is not specified, try to work it out from the file name if ('' === $type) { $type = static::filenameToType($path); } if (!$this->validateEncoding($encoding)) { throw new Exception($this->lang('encoding') . $encoding); } $filename = (string) static::mb_pathinfo($path, PATHINFO_BASENAME); if ('' === $name) { $name = $filename; } //Append to $attachment array $this->attachment[] = [ 0 => $path, 1 => $filename, 2 => $name, 3 => $encoding, 4 => $type, 5 => false, //isStringAttachment 6 => $disposition, 7 => $cid, ]; } catch (Exception $exc) { $this->setError($exc->getMessage()); $this->edebug($exc->getMessage()); if ($this->exceptions) { throw $exc; } return false; } return true; } /** * Add an embedded stringified attachment. * This can include images, sounds, and just about any other document type. * If your filename doesn't contain an extension, be sure to set the $type to an appropriate MIME type. * * @param string $string The attachment binary data * @param string $cid Content ID of the attachment; Use this to reference * the content when using an embedded image in HTML * @param string $name A filename for the attachment. If this contains an extension, * PHPMailer will attempt to set a MIME type for the attachment. * For example 'file.jpg' would get an 'image/jpeg' MIME type. * @param string $encoding File encoding (see $Encoding), defaults to 'base64' * @param string $type MIME type - will be used in preference to any automatically derived type * @param string $disposition Disposition to use * * @throws Exception * * @return bool True on successfully adding an attachment */ public function addStringEmbeddedImage( $string, $cid, $name = '', $encoding = self::ENCODING_BASE64, $type = '', $disposition = 'inline' ) { try { //If a MIME type is not specified, try to work it out from the name if ('' === $type && !empty($name)) { $type = static::filenameToType($name); } if (!$this->validateEncoding($encoding)) { throw new Exception($this->lang('encoding') . $encoding); } //Append to $attachment array $this->attachment[] = [ 0 => $string, 1 => $name, 2 => $name, 3 => $encoding, 4 => $type, 5 => true, //isStringAttachment 6 => $disposition, 7 => $cid, ]; } catch (Exception $exc) { $this->setError($exc->getMessage()); $this->edebug($exc->getMessage()); if ($this->exceptions) { throw $exc; } return false; } return true; } /** * Validate encodings. * * @param string $encoding * * @return bool */ protected function validateEncoding($encoding) { return in_array( $encoding, [ self::ENCODING_7BIT, self::ENCODING_QUOTED_PRINTABLE, self::ENCODING_BASE64, self::ENCODING_8BIT, self::ENCODING_BINARY, ], true ); } /** * Check if an embedded attachment is present with this cid. * * @param string $cid * * @return bool */ protected function cidExists($cid) { foreach ($this->attachment as $attachment) { if ('inline' === $attachment[6] && $cid === $attachment[7]) { return true; } } return false; } /** * Check if an inline attachment is present. * * @return bool */ public function inlineImageExists() { foreach ($this->attachment as $attachment) { if ('inline' === $attachment[6]) { return true; } } return false; } /** * Check if an attachment (non-inline) is present. * * @return bool */ public function attachmentExists() { foreach ($this->attachment as $attachment) { if ('attachment' === $attachment[6]) { return true; } } return false; } /** * Check if this message has an alternative body set. * * @return bool */ public function alternativeExists() { return !empty($this->AltBody); } /** * Clear queued addresses of given kind. * * @param string $kind 'to', 'cc', or 'bcc' */ public function clearQueuedAddresses($kind) { $this->RecipientsQueue = array_filter( $this->RecipientsQueue, static function ($params) use ($kind) { return $params[0] !== $kind; } ); } /** * Clear all To recipients. */ public function clearAddresses() { foreach ($this->to as $to) { unset($this->all_recipients[strtolower($to[0])]); } $this->to = []; $this->clearQueuedAddresses('to'); } /** * Clear all CC recipients. */ public function clearCCs() { foreach ($this->cc as $cc) { unset($this->all_recipients[strtolower($cc[0])]); } $this->cc = []; $this->clearQueuedAddresses('cc'); } /** * Clear all BCC recipients. */ public function clearBCCs() { foreach ($this->bcc as $bcc) { unset($this->all_recipients[strtolower($bcc[0])]); } $this->bcc = []; $this->clearQueuedAddresses('bcc'); } /** * Clear all ReplyTo recipients. */ public function clearReplyTos() { $this->ReplyTo = []; $this->ReplyToQueue = []; } /** * Clear all recipient types. */ public function clearAllRecipients() { $this->to = []; $this->cc = []; $this->bcc = []; $this->all_recipients = []; $this->RecipientsQueue = []; } /** * Clear all filesystem, string, and binary attachments. */ public function clearAttachments() { $this->attachment = []; } /** * Clear all custom headers. */ public function clearCustomHeaders() { $this->CustomHeader = []; } /** * Add an error message to the error container. * * @param string $msg */ protected function setError($msg) { ++$this->error_count; if ('smtp' === $this->Mailer && null !== $this->smtp) { $lasterror = $this->smtp->getError(); if (!empty($lasterror['error'])) { $msg .= $this->lang('smtp_error') . $lasterror['error']; if (!empty($lasterror['detail'])) { $msg .= ' ' . $this->lang('smtp_detail') . $lasterror['detail']; } if (!empty($lasterror['smtp_code'])) { $msg .= ' ' . $this->lang('smtp_code') . $lasterror['smtp_code']; } if (!empty($lasterror['smtp_code_ex'])) { $msg .= ' ' . $this->lang('smtp_code_ex') . $lasterror['smtp_code_ex']; } } } $this->ErrorInfo = $msg; } /** * Return an RFC 822 formatted date. * * @return string */ public static function rfcDate() { //Set the time zone to whatever the default is to avoid 500 errors //Will default to UTC if it's not set properly in php.ini date_default_timezone_set(@date_default_timezone_get()); return date('D, j M Y H:i:s O'); } /** * Get the server hostname. * Returns 'localhost.localdomain' if unknown. * * @return string */ protected function serverHostname() { $result = ''; if (!empty($this->Hostname)) { $result = $this->Hostname; } elseif (isset($_SERVER) && array_key_exists('SERVER_NAME', $_SERVER)) { $result = $_SERVER['SERVER_NAME']; } elseif (function_exists('gethostname') && gethostname() !== false) { $result = gethostname(); } elseif (php_uname('n') !== false) { $result = php_uname('n'); } if (!static::isValidHost($result)) { return 'localhost.localdomain'; } return $result; } /** * Validate whether a string contains a valid value to use as a hostname or IP address. * IPv6 addresses must include [], e.g. `[::1]`, not just `::1`. * * @param string $host The host name or IP address to check * * @return bool */ public static function isValidHost($host) { //Simple syntax limits if ( empty($host) || !is_string($host) || strlen($host) > 256 || !preg_match('/^([a-zA-Z\d.-]*|\[[a-fA-F\d:]+\])$/', $host) ) { return false; } //Looks like a bracketed IPv6 address if (strlen($host) > 2 && substr($host, 0, 1) === '[' && substr($host, -1, 1) === ']') { return filter_var(substr($host, 1, -1), FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) !== false; } //If removing all the dots results in a numeric string, it must be an IPv4 address. //Need to check this first because otherwise things like `999.0.0.0` are considered valid host names if (is_numeric(str_replace('.', '', $host))) { //Is it a valid IPv4 address? return filter_var($host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) !== false; } //Is it a syntactically valid hostname (when embeded in a URL)? return filter_var('http://' . $host, FILTER_VALIDATE_URL) !== false; } /** * Get an error message in the current language. * * @param string $key * * @return string */ protected function lang($key) { if (count($this->language) < 1) { $this->setLanguage(); //Set the default language } if (array_key_exists($key, $this->language)) { if ('smtp_connect_failed' === $key) { //Include a link to troubleshooting docs on SMTP connection failure. //This is by far the biggest cause of support questions //but it's usually not PHPMailer's fault. return $this->language[$key] . ' https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting'; } return $this->language[$key]; } //Return the key as a fallback return $key; } /** * Build an error message starting with a generic one and adding details if possible. * * @param string $base_key * @return string */ private function getSmtpErrorMessage($base_key) { $message = $this->lang($base_key); $error = $this->smtp->getError(); if (!empty($error['error'])) { $message .= ' ' . $error['error']; if (!empty($error['detail'])) { $message .= ' ' . $error['detail']; } } return $message; } /** * Check if an error occurred. * * @return bool True if an error did occur */ public function isError() { return $this->error_count > 0; } /** * Add a custom header. * $name value can be overloaded to contain * both header name and value (name:value). * * @param string $name Custom header name * @param string|null $value Header value * * @throws Exception */ public function addCustomHeader($name, $value = null) { if (null === $value && strpos($name, ':') !== false) { //Value passed in as name:value list($name, $value) = explode(':', $name, 2); } $name = trim($name); $value = (null === $value) ? '' : trim($value); //Ensure name is not empty, and that neither name nor value contain line breaks if (empty($name) || strpbrk($name . $value, "\r\n") !== false) { if ($this->exceptions) { throw new Exception($this->lang('invalid_header')); } return false; } $this->CustomHeader[] = [$name, $value]; return true; } /** * Returns all custom headers. * * @return array */ public function getCustomHeaders() { return $this->CustomHeader; } /** * Create a message body from an HTML string. * Automatically inlines images and creates a plain-text version by converting the HTML, * overwriting any existing values in Body and AltBody. * Do not source $message content from user input! * $basedir is prepended when handling relative URLs, e.g. <img src="/images/a.png"> and must not be empty * will look for an image file in $basedir/images/a.png and convert it to inline. * If you don't provide a $basedir, relative paths will be left untouched (and thus probably break in email) * Converts data-uri images into embedded attachments. * If you don't want to apply these transformations to your HTML, just set Body and AltBody directly. * * @param string $message HTML message string * @param string $basedir Absolute path to a base directory to prepend to relative paths to images * @param bool|callable $advanced Whether to use the internal HTML to text converter * or your own custom converter * @return string The transformed message body * * @throws Exception * * @see PHPMailer::html2text() */ public function msgHTML($message, $basedir = '', $advanced = false) { preg_match_all('/(?<!-)(src|background)=["\'](.*)["\']/Ui', $message, $images); if (array_key_exists(2, $images)) { if (strlen($basedir) > 1 && '/' !== substr($basedir, -1)) { //Ensure $basedir has a trailing / $basedir .= '/'; } foreach ($images[2] as $imgindex => $url) { //Convert data URIs into embedded images //e.g. "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" $match = []; if (preg_match('#^data:(image/(?:jpe?g|gif|png));?(base64)?,(.+)#', $url, $match)) { if (count($match) === 4 && static::ENCODING_BASE64 === $match[2]) { $data = base64_decode($match[3]); } elseif ('' === $match[2]) { $data = rawurldecode($match[3]); } else { //Not recognised so leave it alone continue; } //Hash the decoded data, not the URL, so that the same data-URI image used in multiple places //will only be embedded once, even if it used a different encoding $cid = substr(hash('sha256', $data), 0, 32) . '@phpmailer.0'; //RFC2392 S 2 if (!$this->cidExists($cid)) { $this->addStringEmbeddedImage( $data, $cid, 'embed' . $imgindex, static::ENCODING_BASE64, $match[1] ); } $message = str_replace( $images[0][$imgindex], $images[1][$imgindex] . '="cid:' . $cid . '"', $message ); continue; } if ( //Only process relative URLs if a basedir is provided (i.e. no absolute local paths) !empty($basedir) //Ignore URLs containing parent dir traversal (..) && (strpos($url, '..') === false) //Do not change urls that are already inline images && 0 !== strpos($url, 'cid:') //Do not change absolute URLs, including anonymous protocol && !preg_match('#^[a-z][a-z0-9+.-]*:?//#i', $url) ) { $filename = static::mb_pathinfo($url, PATHINFO_BASENAME); $directory = dirname($url); if ('.' === $directory) { $directory = ''; } //RFC2392 S 2 $cid = substr(hash('sha256', $url), 0, 32) . '@phpmailer.0'; if (strlen($basedir) > 1 && '/' !== substr($basedir, -1)) { $basedir .= '/'; } if (strlen($directory) > 1 && '/' !== substr($directory, -1)) { $directory .= '/'; } if ( $this->addEmbeddedImage( $basedir . $directory . $filename, $cid, $filename, static::ENCODING_BASE64, static::_mime_types((string) static::mb_pathinfo($filename, PATHINFO_EXTENSION)) ) ) { $message = preg_replace( '/' . $images[1][$imgindex] . '=["\']' . preg_quote($url, '/') . '["\']/Ui', $images[1][$imgindex] . '="cid:' . $cid . '"', $message ); } } } } $this->isHTML(); //Convert all message body line breaks to LE, makes quoted-printable encoding work much better $this->Body = static::normalizeBreaks($message); $this->AltBody = static::normalizeBreaks($this->html2text($message, $advanced)); if (!$this->alternativeExists()) { $this->AltBody = 'This is an HTML-only message. To view it, activate HTML in your email application.' . static::$LE; } return $this->Body; } /** * Convert an HTML string into plain text. * This is used by msgHTML(). * Note - older versions of this function used a bundled advanced converter * which was removed for license reasons in #232. * Example usage: * * ```php * //Use default conversion * $plain = $mail->html2text($html); * //Use your own custom converter * $plain = $mail->html2text($html, function($html) { * $converter = new MyHtml2text($html); * return $converter->get_text(); * }); * ``` * * @param string $html The HTML text to convert * @param bool|callable $advanced Any boolean value to use the internal converter, * or provide your own callable for custom conversion. * *Never* pass user-supplied data into this parameter * * @return string */ public function html2text($html, $advanced = false) { if (is_callable($advanced)) { return call_user_func($advanced, $html); } return html_entity_decode( trim(strip_tags(preg_replace('/<(head|title|style|script)[^>]*>.*?<\/\\1>/si', '', $html))), ENT_QUOTES, $this->CharSet ); } /** * Get the MIME type for a file extension. * * @param string $ext File extension * * @return string MIME type of file */ public static function _mime_types($ext = '') { $mimes = [ 'xl' => 'application/excel', 'js' => 'application/javascript', 'hqx' => 'application/mac-binhex40', 'cpt' => 'application/mac-compactpro', 'bin' => 'application/macbinary', 'doc' => 'application/msword', 'word' => 'application/msword', 'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template', 'potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template', 'ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow', 'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation', 'sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide', 'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template', 'xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12', 'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12', 'class' => 'application/octet-stream', 'dll' => 'application/octet-stream', 'dms' => 'application/octet-stream', 'exe' => 'application/octet-stream', 'lha' => 'application/octet-stream', 'lzh' => 'application/octet-stream', 'psd' => 'application/octet-stream', 'sea' => 'application/octet-stream', 'so' => 'application/octet-stream', 'oda' => 'application/oda', 'pdf' => 'application/pdf', 'ai' => 'application/postscript', 'eps' => 'application/postscript', 'ps' => 'application/postscript', 'smi' => 'application/smil', 'smil' => 'application/smil', 'mif' => 'application/vnd.mif', 'xls' => 'application/vnd.ms-excel', 'ppt' => 'application/vnd.ms-powerpoint', 'wbxml' => 'application/vnd.wap.wbxml', 'wmlc' => 'application/vnd.wap.wmlc', 'dcr' => 'application/x-director', 'dir' => 'application/x-director', 'dxr' => 'application/x-director', 'dvi' => 'application/x-dvi', 'gtar' => 'application/x-gtar', 'php3' => 'application/x-httpd-php', 'php4' => 'application/x-httpd-php', 'php' => 'application/x-httpd-php', 'phtml' => 'application/x-httpd-php', 'phps' => 'application/x-httpd-php-source', 'swf' => 'application/x-shockwave-flash', 'sit' => 'application/x-stuffit', 'tar' => 'application/x-tar', 'tgz' => 'application/x-tar', 'xht' => 'application/xhtml+xml', 'xhtml' => 'application/xhtml+xml', 'zip' => 'application/zip', 'mid' => 'audio/midi', 'midi' => 'audio/midi', 'mp2' => 'audio/mpeg', 'mp3' => 'audio/mpeg', 'm4a' => 'audio/mp4', 'mpga' => 'audio/mpeg', 'aif' => 'audio/x-aiff', 'aifc' => 'audio/x-aiff', 'aiff' => 'audio/x-aiff', 'ram' => 'audio/x-pn-realaudio', 'rm' => 'audio/x-pn-realaudio', 'rpm' => 'audio/x-pn-realaudio-plugin', 'ra' => 'audio/x-realaudio', 'wav' => 'audio/x-wav', 'mka' => 'audio/x-matroska', 'bmp' => 'image/bmp', 'gif' => 'image/gif', 'jpeg' => 'image/jpeg', 'jpe' => 'image/jpeg', 'jpg' => 'image/jpeg', 'png' => 'image/png', 'tiff' => 'image/tiff', 'tif' => 'image/tiff', 'webp' => 'image/webp', 'avif' => 'image/avif', 'heif' => 'image/heif', 'heifs' => 'image/heif-sequence', 'heic' => 'image/heic', 'heics' => 'image/heic-sequence', 'eml' => 'message/rfc822', 'css' => 'text/css', 'html' => 'text/html', 'htm' => 'text/html', 'shtml' => 'text/html', 'log' => 'text/plain', 'text' => 'text/plain', 'txt' => 'text/plain', 'rtx' => 'text/richtext', 'rtf' => 'text/rtf', 'vcf' => 'text/vcard', 'vcard' => 'text/vcard', 'ics' => 'text/calendar', 'xml' => 'text/xml', 'xsl' => 'text/xml', 'wmv' => 'video/x-ms-wmv', 'mpeg' => 'video/mpeg', 'mpe' => 'video/mpeg', 'mpg' => 'video/mpeg', 'mp4' => 'video/mp4', 'm4v' => 'video/mp4', 'mov' => 'video/quicktime', 'qt' => 'video/quicktime', 'rv' => 'video/vnd.rn-realvideo', 'avi' => 'video/x-msvideo', 'movie' => 'video/x-sgi-movie', 'webm' => 'video/webm', 'mkv' => 'video/x-matroska', ]; $ext = strtolower($ext); if (array_key_exists($ext, $mimes)) { return $mimes[$ext]; } return 'application/octet-stream'; } /** * Map a file name to a MIME type. * Defaults to 'application/octet-stream', i.e.. arbitrary binary data. * * @param string $filename A file name or full path, does not need to exist as a file * * @return string */ public static function filenameToType($filename) { //In case the path is a URL, strip any query string before getting extension $qpos = strpos($filename, '?'); if (false !== $qpos) { $filename = substr($filename, 0, $qpos); } $ext = static::mb_pathinfo($filename, PATHINFO_EXTENSION); return static::_mime_types($ext); } /** * Multi-byte-safe pathinfo replacement. * Drop-in replacement for pathinfo(), but multibyte- and cross-platform-safe. * * @see http://www.php.net/manual/en/function.pathinfo.php#107461 * * @param string $path A filename or path, does not need to exist as a file * @param int|string $options Either a PATHINFO_* constant, * or a string name to return only the specified piece * * @return string|array */ public static function mb_pathinfo($path, $options = null) { $ret = ['dirname' => '', 'basename' => '', 'extension' => '', 'filename' => '']; $pathinfo = []; if (preg_match('#^(.*?)[\\\\/]*(([^/\\\\]*?)(\.([^.\\\\/]+?)|))[\\\\/.]*$#m', $path, $pathinfo)) { if (array_key_exists(1, $pathinfo)) { $ret['dirname'] = $pathinfo[1]; } if (array_key_exists(2, $pathinfo)) { $ret['basename'] = $pathinfo[2]; } if (array_key_exists(5, $pathinfo)) { $ret['extension'] = $pathinfo[5]; } if (array_key_exists(3, $pathinfo)) { $ret['filename'] = $pathinfo[3]; } } switch ($options) { case PATHINFO_DIRNAME: case 'dirname': return $ret['dirname']; case PATHINFO_BASENAME: case 'basename': return $ret['basename']; case PATHINFO_EXTENSION: case 'extension': return $ret['extension']; case PATHINFO_FILENAME: case 'filename': return $ret['filename']; default: return $ret; } } /** * Set or reset instance properties. * You should avoid this function - it's more verbose, less efficient, more error-prone and * harder to debug than setting properties directly. * Usage Example: * `$mail->set('SMTPSecure', static::ENCRYPTION_STARTTLS);` * is the same as: * `$mail->SMTPSecure = static::ENCRYPTION_STARTTLS;`. * * @param string $name The property name to set * @param mixed $value The value to set the property to * * @return bool */ public function set($name, $value = '') { if (property_exists($this, $name)) { $this->{$name} = $value; return true; } $this->setError($this->lang('variable_set') . $name); return false; } /** * Strip newlines to prevent header injection. * * @param string $str * * @return string */ public function secureHeader($str) { return trim(str_replace(["\r", "\n"], '', $str)); } /** * Normalize line breaks in a string. * Converts UNIX LF, Mac CR and Windows CRLF line breaks into a single line break format. * Defaults to CRLF (for message bodies) and preserves consecutive breaks. * * @param string $text * @param string $breaktype What kind of line break to use; defaults to static::$LE * * @return string */ public static function normalizeBreaks($text, $breaktype = null) { if (null === $breaktype) { $breaktype = static::$LE; } //Normalise to \n $text = str_replace([self::CRLF, "\r"], "\n", $text); //Now convert LE as needed if ("\n" !== $breaktype) { $text = str_replace("\n", $breaktype, $text); } return $text; } /** * Remove trailing breaks from a string. * * @param string $text * * @return string The text to remove breaks from */ public static function stripTrailingWSP($text) { return rtrim($text, " \r\n\t"); } /** * Return the current line break format string. * * @return string */ public static function getLE() { return static::$LE; } /** * Set the line break format string, e.g. "\r\n". * * @param string $le */ protected static function setLE($le) { static::$LE = $le; } /** * Set the public and private key files and password for S/MIME signing. * * @param string $cert_filename * @param string $key_filename * @param string $key_pass Password for private key * @param string $extracerts_filename Optional path to chain certificate */ public function sign($cert_filename, $key_filename, $key_pass, $extracerts_filename = '') { $this->sign_cert_file = $cert_filename; $this->sign_key_file = $key_filename; $this->sign_key_pass = $key_pass; $this->sign_extracerts_file = $extracerts_filename; } /** * Quoted-Printable-encode a DKIM header. * * @param string $txt * * @return string */ public function DKIM_QP($txt) { $line = ''; $len = strlen($txt); for ($i = 0; $i < $len; ++$i) { $ord = ord($txt[$i]); if (((0x21 <= $ord) && ($ord <= 0x3A)) || $ord === 0x3C || ((0x3E <= $ord) && ($ord <= 0x7E))) { $line .= $txt[$i]; } else { $line .= '=' . sprintf('%02X', $ord); } } return $line; } /** * Generate a DKIM signature. * * @param string $signHeader * * @throws Exception * * @return string The DKIM signature value */ public function DKIM_Sign($signHeader) { if (!defined('PKCS7_TEXT')) { if ($this->exceptions) { throw new Exception($this->lang('extension_missing') . 'openssl'); } return ''; } $privKeyStr = !empty($this->DKIM_private_string) ? $this->DKIM_private_string : file_get_contents($this->DKIM_private); if ('' !== $this->DKIM_passphrase) { $privKey = openssl_pkey_get_private($privKeyStr, $this->DKIM_passphrase); } else { $privKey = openssl_pkey_get_private($privKeyStr); } if (openssl_sign($signHeader, $signature, $privKey, 'sha256WithRSAEncryption')) { if (\PHP_MAJOR_VERSION < 8) { openssl_pkey_free($privKey); } return base64_encode($signature); } if (\PHP_MAJOR_VERSION < 8) { openssl_pkey_free($privKey); } return ''; } /** * Generate a DKIM canonicalization header. * Uses the 'relaxed' algorithm from RFC6376 section 3.4.2. * Canonicalized headers should *always* use CRLF, regardless of mailer setting. * * @see https://tools.ietf.org/html/rfc6376#section-3.4.2 * * @param string $signHeader Header * * @return string */ public function DKIM_HeaderC($signHeader) { //Normalize breaks to CRLF (regardless of the mailer) $signHeader = static::normalizeBreaks($signHeader, self::CRLF); //Unfold header lines //Note PCRE \s is too broad a definition of whitespace; RFC5322 defines it as `[ \t]` //@see https://tools.ietf.org/html/rfc5322#section-2.2 //That means this may break if you do something daft like put vertical tabs in your headers. $signHeader = preg_replace('/\r\n[ \t]+/', ' ', $signHeader); //Break headers out into an array $lines = explode(self::CRLF, $signHeader); foreach ($lines as $key => $line) { //If the header is missing a :, skip it as it's invalid //This is likely to happen because the explode() above will also split //on the trailing LE, leaving an empty line if (strpos($line, ':') === false) { continue; } list($heading, $value) = explode(':', $line, 2); //Lower-case header name $heading = strtolower($heading); //Collapse white space within the value, also convert WSP to space $value = preg_replace('/[ \t]+/', ' ', $value); //RFC6376 is slightly unclear here - it says to delete space at the *end* of each value //But then says to delete space before and after the colon. //Net result is the same as trimming both ends of the value. //By elimination, the same applies to the field name $lines[$key] = trim($heading, " \t") . ':' . trim($value, " \t"); } return implode(self::CRLF, $lines); } /** * Generate a DKIM canonicalization body. * Uses the 'simple' algorithm from RFC6376 section 3.4.3. * Canonicalized bodies should *always* use CRLF, regardless of mailer setting. * * @see https://tools.ietf.org/html/rfc6376#section-3.4.3 * * @param string $body Message Body * * @return string */ public function DKIM_BodyC($body) { if (empty($body)) { return self::CRLF; } //Normalize line endings to CRLF $body = static::normalizeBreaks($body, self::CRLF); //Reduce multiple trailing line breaks to a single one return static::stripTrailingWSP($body) . self::CRLF; } /** * Create the DKIM header and body in a new message header. * * @param string $headers_line Header lines * @param string $subject Subject * @param string $body Body * * @throws Exception * * @return string */ public function DKIM_Add($headers_line, $subject, $body) { $DKIMsignatureType = 'rsa-sha256'; //Signature & hash algorithms $DKIMcanonicalization = 'relaxed/simple'; //Canonicalization methods of header & body $DKIMquery = 'dns/txt'; //Query method $DKIMtime = time(); //Always sign these headers without being asked //Recommended list from https://tools.ietf.org/html/rfc6376#section-5.4.1 $autoSignHeaders = [ 'from', 'to', 'cc', 'date', 'subject', 'reply-to', 'message-id', 'content-type', 'mime-version', 'x-mailer', ]; if (stripos($headers_line, 'Subject') === false) { $headers_line .= 'Subject: ' . $subject . static::$LE; } $headerLines = explode(static::$LE, $headers_line); $currentHeaderLabel = ''; $currentHeaderValue = ''; $parsedHeaders = []; $headerLineIndex = 0; $headerLineCount = count($headerLines); foreach ($headerLines as $headerLine) { $matches = []; if (preg_match('/^([^ \t]*?)(?::[ \t]*)(.*)$/', $headerLine, $matches)) { if ($currentHeaderLabel !== '') { //We were previously in another header; This is the start of a new header, so save the previous one $parsedHeaders[] = ['label' => $currentHeaderLabel, 'value' => $currentHeaderValue]; } $currentHeaderLabel = $matches[1]; $currentHeaderValue = $matches[2]; } elseif (preg_match('/^[ \t]+(.*)$/', $headerLine, $matches)) { //This is a folded continuation of the current header, so unfold it $currentHeaderValue .= ' ' . $matches[1]; } ++$headerLineIndex; if ($headerLineIndex >= $headerLineCount) { //This was the last line, so finish off this header $parsedHeaders[] = ['label' => $currentHeaderLabel, 'value' => $currentHeaderValue]; } } $copiedHeaders = []; $headersToSignKeys = []; $headersToSign = []; foreach ($parsedHeaders as $header) { //Is this header one that must be included in the DKIM signature? if (in_array(strtolower($header['label']), $autoSignHeaders, true)) { $headersToSignKeys[] = $header['label']; $headersToSign[] = $header['label'] . ': ' . $header['value']; if ($this->DKIM_copyHeaderFields) { $copiedHeaders[] = $header['label'] . ':' . //Note no space after this, as per RFC str_replace('|', '=7C', $this->DKIM_QP($header['value'])); } continue; } //Is this an extra custom header we've been asked to sign? if (in_array($header['label'], $this->DKIM_extraHeaders, true)) { //Find its value in custom headers foreach ($this->CustomHeader as $customHeader) { if ($customHeader[0] === $header['label']) { $headersToSignKeys[] = $header['label']; $headersToSign[] = $header['label'] . ': ' . $header['value']; if ($this->DKIM_copyHeaderFields) { $copiedHeaders[] = $header['label'] . ':' . //Note no space after this, as per RFC str_replace('|', '=7C', $this->DKIM_QP($header['value'])); } //Skip straight to the next header continue 2; } } } } $copiedHeaderFields = ''; if ($this->DKIM_copyHeaderFields && count($copiedHeaders) > 0) { //Assemble a DKIM 'z' tag $copiedHeaderFields = ' z='; $first = true; foreach ($copiedHeaders as $copiedHeader) { if (!$first) { $copiedHeaderFields .= static::$LE . ' |'; } //Fold long values if (strlen($copiedHeader) > self::STD_LINE_LENGTH - 3) { $copiedHeaderFields .= substr( chunk_split($copiedHeader, self::STD_LINE_LENGTH - 3, static::$LE . self::FWS), 0, -strlen(static::$LE . self::FWS) ); } else { $copiedHeaderFields .= $copiedHeader; } $first = false; } $copiedHeaderFields .= ';' . static::$LE; } $headerKeys = ' h=' . implode(':', $headersToSignKeys) . ';' . static::$LE; $headerValues = implode(static::$LE, $headersToSign); $body = $this->DKIM_BodyC($body); //Base64 of packed binary SHA-256 hash of body $DKIMb64 = base64_encode(pack('H*', hash('sha256', $body))); $ident = ''; if ('' !== $this->DKIM_identity) { $ident = ' i=' . $this->DKIM_identity . ';' . static::$LE; } //The DKIM-Signature header is included in the signature *except for* the value of the `b` tag //which is appended after calculating the signature //https://tools.ietf.org/html/rfc6376#section-3.5 $dkimSignatureHeader = 'DKIM-Signature: v=1;' . ' d=' . $this->DKIM_domain . ';' . ' s=' . $this->DKIM_selector . ';' . static::$LE . ' a=' . $DKIMsignatureType . ';' . ' q=' . $DKIMquery . ';' . ' t=' . $DKIMtime . ';' . ' c=' . $DKIMcanonicalization . ';' . static::$LE . $headerKeys . $ident . $copiedHeaderFields . ' bh=' . $DKIMb64 . ';' . static::$LE . ' b='; //Canonicalize the set of headers $canonicalizedHeaders = $this->DKIM_HeaderC( $headerValues . static::$LE . $dkimSignatureHeader ); $signature = $this->DKIM_Sign($canonicalizedHeaders); $signature = trim(chunk_split($signature, self::STD_LINE_LENGTH - 3, static::$LE . self::FWS)); return static::normalizeBreaks($dkimSignatureHeader . $signature); } /** * Detect if a string contains a line longer than the maximum line length * allowed by RFC 2822 section 2.1.1. * * @param string $str * * @return bool */ public static function hasLineLongerThanMax($str) { return (bool) preg_match('/^(.{' . (self::MAX_LINE_LENGTH + strlen(static::$LE)) . ',})/m', $str); } /** * If a string contains any "special" characters, double-quote the name, * and escape any double quotes with a backslash. * * @param string $str * * @return string * * @see RFC822 3.4.1 */ public static function quotedString($str) { if (preg_match('/[ ()<>@,;:"\/\[\]?=]/', $str)) { //If the string contains any of these chars, it must be double-quoted //and any double quotes must be escaped with a backslash return '"' . str_replace('"', '\\"', $str) . '"'; } //Return the string untouched, it doesn't need quoting return $str; } /** * Allows for public read access to 'to' property. * Before the send() call, queued addresses (i.e. with IDN) are not yet included. * * @return array */ public function getToAddresses() { return $this->to; } /** * Allows for public read access to 'cc' property. * Before the send() call, queued addresses (i.e. with IDN) are not yet included. * * @return array */ public function getCcAddresses() { return $this->cc; } /** * Allows for public read access to 'bcc' property. * Before the send() call, queued addresses (i.e. with IDN) are not yet included. * * @return array */ public function getBccAddresses() { return $this->bcc; } /** * Allows for public read access to 'ReplyTo' property. * Before the send() call, queued addresses (i.e. with IDN) are not yet included. * * @return array */ public function getReplyToAddresses() { return $this->ReplyTo; } /** * Allows for public read access to 'all_recipients' property. * Before the send() call, queued addresses (i.e. with IDN) are not yet included. * * @return array */ public function getAllRecipientAddresses() { return $this->all_recipients; } /** * Perform a callback. * * @param bool $isSent * @param array $to * @param array $cc * @param array $bcc * @param string $subject * @param string $body * @param string $from * @param array $extra */ protected function doCallback($isSent, $to, $cc, $bcc, $subject, $body, $from, $extra) { if (!empty($this->action_function) && is_callable($this->action_function)) { call_user_func($this->action_function, $isSent, $to, $cc, $bcc, $subject, $body, $from, $extra); } } /** * Get the OAuthTokenProvider instance. * * @return OAuthTokenProvider */ public function getOAuth() { return $this->oauth; } /** * Set an OAuthTokenProvider instance. */ public function setOAuth(OAuthTokenProvider $oauth) { $this->oauth = $oauth; } }
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