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<?php
/**
* This file is part of CodeIgniter 4 framework.
*
* (c) CodeIgniter Foundation <admin@codeigniter.com>
*
* For the full copyright and license information, please view
* the LICENSE file that was distributed with this source code.
*/
namespace CodeIgniter\Email;
use CodeIgniter\Events\Events;
use Config\Mimes;
use ErrorException;
/**
* CodeIgniter Email Class
*
* Permits email to be sent using Mail, Sendmail, or SMTP.
*/
class Email
{
/**
* Properties from the last successful send.
*
* @var array|null
*/
public $archive;
/**
* Properties to be added to the next archive.
*
* @var array
*/
protected $tmpArchive = [];
/**
* @var string
*/
public $fromEmail;
/**
* @var string
*/
public $fromName;
/**
* Used as the User-Agent and X-Mailer headers' value.
*
* @var string
*/
public $userAgent = 'CodeIgniter';
/**
* Path to the Sendmail binary.
*
* @var string
*/
public $mailPath = '/usr/sbin/sendmail';
/**
* Which method to use for sending e-mails.
*
* @var string 'mail', 'sendmail' or 'smtp'
*/
public $protocol = 'mail';
/**
* STMP Server host
*
* @var string
*/
public $SMTPHost = '';
/**
* SMTP Username
*
* @var string
*/
public $SMTPUser = '';
/**
* SMTP Password
*
* @var string
*/
public $SMTPPass = '';
/**
* SMTP Server port
*
* @var int
*/
public $SMTPPort = 25;
/**
* SMTP connection timeout in seconds
*
* @var int
*/
public $SMTPTimeout = 5;
/**
* SMTP persistent connection
*
* @var bool
*/
public $SMTPKeepAlive = false;
/**
* SMTP Encryption
*
* @var string Empty, 'tls' or 'ssl'
*/
public $SMTPCrypto = '';
/**
* Whether to apply word-wrapping to the message body.
*
* @var bool
*/
public $wordWrap = true;
/**
* Number of characters to wrap at.
*
* @see Email::$wordWrap
*
* @var int
*/
public $wrapChars = 76;
/**
* Message format.
*
* @var string 'text' or 'html'
*/
public $mailType = 'text';
/**
* Character set (default: utf-8)
*
* @var string
*/
public $charset = 'utf-8';
/**
* Alternative message (for HTML messages only)
*
* @var string
*/
public $altMessage = '';
/**
* Whether to validate e-mail addresses.
*
* @var bool
*/
public $validate = true;
/**
* X-Priority header value.
*
* @var int 1-5
*/
public $priority = 3;
/**
* Newline character sequence.
* Use "\r\n" to comply with RFC 822.
*
* @see http://www.ietf.org/rfc/rfc822.txt
*
* @var string "\r\n" or "\n"
*/
public $newline = "\n";
/**
* CRLF character sequence
*
* RFC 2045 specifies that for 'quoted-printable' encoding,
* "\r\n" must be used. However, it appears that some servers
* (even on the receiving end) don't handle it properly and
* switching to "\n", while improper, is the only solution
* that seems to work for all environments.
*
* @see http://www.ietf.org/rfc/rfc822.txt
*
* @var string
*/
public $CRLF = "\n";
/**
* Whether to use Delivery Status Notification.
*
* @var bool
*/
public $DSN = false;
/**
* Whether to send multipart alternatives.
* Yahoo! doesn't seem to like these.
*
* @var bool
*/
public $sendMultipart = true;
/**
* Whether to send messages to BCC recipients in batches.
*
* @var bool
*/
public $BCCBatchMode = false;
/**
* BCC Batch max number size.
*
* @see Email::$BCCBatchMode
*
* @var int|string
*/
public $BCCBatchSize = 200;
/**
* Subject header
*
* @var string
*/
protected $subject = '';
/**
* Message body
*
* @var string
*/
protected $body = '';
/**
* Final message body to be sent.
*
* @var string
*/
protected $finalBody = '';
/**
* Final headers to send
*
* @var string
*/
protected $headerStr = '';
/**
* SMTP Connection socket placeholder
*
* @var resource|null
*/
protected $SMTPConnect;
/**
* Mail encoding
*
* @var string '8bit' or '7bit'
*/
protected $encoding = '8bit';
/**
* Whether to perform SMTP authentication
*
* @var bool
*/
protected $SMTPAuth = false;
/**
* Whether to send a Reply-To header
*
* @var bool
*/
protected $replyToFlag = false;
/**
* Debug messages
*
* @see Email::printDebugger()
*
* @var array
*/
protected $debugMessage = [];
/**
* Recipients
*
* @var array|string
*/
protected $recipients = [];
/**
* CC Recipients
*
* @var array
*/
protected $CCArray = [];
/**
* BCC Recipients
*
* @var array
*/
protected $BCCArray = [];
/**
* Message headers
*
* @var array
*/
protected $headers = [];
/**
* Attachment data
*
* @var array
*/
protected $attachments = [];
/**
* Valid $protocol values
*
* @see Email::$protocol
*
* @var array
*/
protected $protocols = [
'mail',
'sendmail',
'smtp',
];
/**
* Character sets valid for 7-bit encoding,
* excluding language suffix.
*
* @var array
*/
protected $baseCharsets = [
'us-ascii',
'iso-2022-',
];
/**
* Bit depths
*
* Valid mail encodings
*
* @see Email::$encoding
*
* @var array
*/
protected $bitDepths = [
'7bit',
'8bit',
];
/**
* $priority translations
*
* Actual values to send with the X-Priority header
*
* @var array
*/
protected $priorities = [
1 => '1 (Highest)',
2 => '2 (High)',
3 => '3 (Normal)',
4 => '4 (Low)',
5 => '5 (Lowest)',
];
/**
* mbstring.func_overload flag
*
* @var bool
*/
protected static $func_overload;
/**
* @param array|null $config
*/
public function __construct($config = null)
{
$this->initialize($config);
if (! isset(static::$func_overload)) {
static::$func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload'));
}
}
/**
* Initialize preferences
*
* @param array|\Config\Email $config
*
* @return Email
*/
public function initialize($config)
{
$this->clear();
if ($config instanceof \Config\Email) {
$config = get_object_vars($config);
}
foreach (array_keys(get_class_vars(static::class)) as $key) {
if (property_exists($this, $key) && isset($config[$key])) {
$method = 'set' . ucfirst($key);
if (method_exists($this, $method)) {
$this->{$method}($config[$key]);
} else {
$this->{$key} = $config[$key];
}
}
}
$this->charset = strtoupper($this->charset);
$this->SMTPAuth = isset($this->SMTPUser[0], $this->SMTPPass[0]);
return $this;
}
/**
* @param bool $clearAttachments
*
* @return Email
*/
public function clear($clearAttachments = false)
{
$this->subject = '';
$this->body = '';
$this->finalBody = '';
$this->headerStr = '';
$this->replyToFlag = false;
$this->recipients = [];
$this->CCArray = [];
$this->BCCArray = [];
$this->headers = [];
$this->debugMessage = [];
$this->setHeader('Date', $this->setDate());
if ($clearAttachments !== false) {
$this->attachments = [];
}
return $this;
}
/**
* @param string $from
* @param string $name
* @param string|null $returnPath Return-Path
*
* @return Email
*/
public function setFrom($from, $name = '', $returnPath = null)
{
if (preg_match('/\<(.*)\>/', $from, $match)) {
$from = $match[1];
}
if ($this->validate) {
$this->validateEmail($this->stringToArray($from));
if ($returnPath) {
$this->validateEmail($this->stringToArray($returnPath));
}
}
$this->tmpArchive['fromEmail'] = $from;
$this->tmpArchive['fromName'] = $name;
if ($name !== '') {
// only use Q encoding if there are characters that would require it
if (! preg_match('/[\200-\377]/', $name)) {
$name = '"' . addcslashes($name, "\0..\37\177'\"\\") . '"';
} else {
$name = $this->prepQEncoding($name);
}
}
$this->setHeader('From', $name . ' <' . $from . '>');
if (! isset($returnPath)) {
$returnPath = $from;
}
$this->setHeader('Return-Path', '<' . $returnPath . '>');
$this->tmpArchive['returnPath'] = $returnPath;
return $this;
}
/**
* @param string $replyto
* @param string $name
*
* @return Email
*/
public function setReplyTo($replyto, $name = '')
{
if (preg_match('/\<(.*)\>/', $replyto, $match)) {
$replyto = $match[1];
}
if ($this->validate) {
$this->validateEmail($this->stringToArray($replyto));
}
if ($name !== '') {
$this->tmpArchive['replyName'] = $name;
// only use Q encoding if there are characters that would require it
if (! preg_match('/[\200-\377]/', $name)) {
$name = '"' . addcslashes($name, "\0..\37\177'\"\\") . '"';
} else {
$name = $this->prepQEncoding($name);
}
}
$this->setHeader('Reply-To', $name . ' <' . $replyto . '>');
$this->replyToFlag = true;
$this->tmpArchive['replyTo'] = $replyto;
return $this;
}
/**
* @param array|string $to
*
* @return Email
*/
public function setTo($to)
{
$to = $this->stringToArray($to);
$to = $this->cleanEmail($to);
if ($this->validate) {
$this->validateEmail($to);
}
if ($this->getProtocol() !== 'mail') {
$this->setHeader('To', implode(', ', $to));
}
$this->recipients = $to;
return $this;
}
/**
* @param string $cc
*
* @return Email
*/
public function setCC($cc)
{
$cc = $this->cleanEmail($this->stringToArray($cc));
if ($this->validate) {
$this->validateEmail($cc);
}
$this->setHeader('Cc', implode(', ', $cc));
if ($this->getProtocol() === 'smtp') {
$this->CCArray = $cc;
}
$this->tmpArchive['CCArray'] = $cc;
return $this;
}
/**
* @param string $bcc
* @param string $limit
*
* @return Email
*/
public function setBCC($bcc, $limit = '')
{
if ($limit !== '' && is_numeric($limit)) {
$this->BCCBatchMode = true;
$this->BCCBatchSize = $limit;
}
$bcc = $this->cleanEmail($this->stringToArray($bcc));
if ($this->validate) {
$this->validateEmail($bcc);
}
if ($this->getProtocol() === 'smtp' || ($this->BCCBatchMode && count($bcc) > $this->BCCBatchSize)) {
$this->BCCArray = $bcc;
} else {
$this->setHeader('Bcc', implode(', ', $bcc));
$this->tmpArchive['BCCArray'] = $bcc;
}
return $this;
}
/**
* @param string $subject
*
* @return Email
*/
public function setSubject($subject)
{
$this->tmpArchive['subject'] = $subject;
$subject = $this->prepQEncoding($subject);
$this->setHeader('Subject', $subject);
return $this;
}
/**
* @param string $body
*
* @return Email
*/
public function setMessage($body)
{
$this->body = rtrim(str_replace("\r", '', $body));
return $this;
}
/**
* @param string $file Can be local path, URL or buffered content
* @param string $disposition 'attachment'
* @param string|null $newname
* @param string $mime
*
* @return bool|Email
*/
public function attach($file, $disposition = '', $newname = null, $mime = '')
{
if ($mime === '') {
if (strpos($file, '://') === false && ! is_file($file)) {
$this->setErrorMessage(lang('Email.attachmentMissing', [$file]));
return false;
}
if (! $fp = @fopen($file, 'rb')) {
$this->setErrorMessage(lang('Email.attachmentUnreadable', [$file]));
return false;
}
$fileContent = stream_get_contents($fp);
$mime = $this->mimeTypes(pathinfo($file, PATHINFO_EXTENSION));
fclose($fp);
} else {
$fileContent = &$file; // buffered file
}
// declare names on their own, to make phpcbf happy
$namesAttached = [$file, $newname];
$this->attachments[] = [
'name' => $namesAttached,
'disposition' => empty($disposition) ? 'attachment' : $disposition,
// Can also be 'inline' Not sure if it matters
'type' => $mime,
'content' => chunk_split(base64_encode($fileContent)),
'multipart' => 'mixed',
];
return $this;
}
/**
* Set and return attachment Content-ID
* Useful for attached inline pictures
*
* @param string $filename
*
* @return bool|string
*/
public function setAttachmentCID($filename)
{
foreach ($this->attachments as $i => $attachment) {
if ($attachment['name'][0] === $filename) {
$this->attachments[$i]['multipart'] = 'related';
$this->attachments[$i]['cid'] = uniqid(basename($attachment['name'][0]) . '@', true);
return $this->attachments[$i]['cid'];
}
}
return false;
}
/**
* @param string $header
* @param string $value
*
* @return Email
*/
public function setHeader($header, $value)
{
$this->headers[$header] = str_replace(["\n", "\r"], '', $value);
return $this;
}
/**
* @param string $email
*
* @return array
*/
protected function stringToArray($email)
{
if (! is_array($email)) {
return (strpos($email, ',') !== false) ? preg_split('/[\s,]/', $email, -1, PREG_SPLIT_NO_EMPTY) : (array) trim($email);
}
return $email;
}
/**
* @param string $str
*
* @return Email
*/
public function setAltMessage($str)
{
$this->altMessage = (string) $str;
return $this;
}
/**
* @param string $type
*
* @return Email
*/
public function setMailType($type = 'text')
{
$this->mailType = ($type === 'html') ? 'html' : 'text';
return $this;
}
/**
* @param bool $wordWrap
*
* @return Email
*/
public function setWordWrap($wordWrap = true)
{
$this->wordWrap = (bool) $wordWrap;
return $this;
}
/**
* @param string $protocol
*
* @return Email
*/
public function setProtocol($protocol = 'mail')
{
$this->protocol = in_array($protocol, $this->protocols, true) ? strtolower($protocol) : 'mail';
return $this;
}
/**
* @param int $n
*
* @return Email
*/
public function setPriority($n = 3)
{
$this->priority = preg_match('/^[1-5]$/', (string) $n) ? (int) $n : 3;
return $this;
}
/**
* @param string $newline
*
* @return Email
*/
public function setNewline($newline = "\n")
{
$this->newline = in_array($newline, ["\n", "\r\n", "\r"], true) ? $newline : "\n";
return $this;
}
/**
* @param string $CRLF
*
* @return Email
*/
public function setCRLF($CRLF = "\n")
{
$this->CRLF = ($CRLF !== "\n" && $CRLF !== "\r\n" && $CRLF !== "\r") ? "\n" : $CRLF;
return $this;
}
/**
* @return string
*/
protected function getMessageID()
{
$from = str_replace(['>', '<'], '', $this->headers['Return-Path']);
return '<' . uniqid('', true) . strstr($from, '@') . '>';
}
/**
* @return string
*/
protected function getProtocol()
{
$this->protocol = strtolower($this->protocol);
if (! in_array($this->protocol, $this->protocols, true)) {
$this->protocol = 'mail';
}
return $this->protocol;
}
/**
* @return string
*/
protected function getEncoding()
{
if (! in_array($this->encoding, $this->bitDepths, true)) {
$this->encoding = '8bit';
}
foreach ($this->baseCharsets as $charset) {
if (strpos($this->charset, $charset) === 0) {
$this->encoding = '7bit';
break;
}
}
return $this->encoding;
}
/**
* @return string
*/
protected function getContentType()
{
if ($this->mailType === 'html') {
return empty($this->attachments) ? 'html' : 'html-attach';
}
if ($this->mailType === 'text' && ! empty($this->attachments)) {
return 'plain-attach';
}
return 'plain';
}
/**
* Set RFC 822 Date
*
* @return string
*/
protected function setDate()
{
$timezone = date('Z');
$operator = ($timezone[0] === '-') ? '-' : '+';
$timezone = abs($timezone);
$timezone = floor($timezone / 3600) * 100 + ($timezone % 3600) / 60;
return sprintf('%s %s%04d', date('D, j M Y H:i:s'), $operator, $timezone);
}
/**
* @return string
*/
protected function getMimeMessage()
{
return 'This is a multi-part message in MIME format.' . $this->newline . 'Your email application may not support this format.';
}
/**
* @param array|string $email
*
* @return bool
*/
public function validateEmail($email)
{
if (! is_array($email)) {
$this->setErrorMessage(lang('Email.mustBeArray'));
return false;
}
foreach ($email as $val) {
if (! $this->isValidEmail($val)) {
$this->setErrorMessage(lang('Email.invalidAddress', [$val]));
return false;
}
}
return true;
}
/**
* @param string $email
*
* @return bool
*/
public function isValidEmail($email)
{
if (function_exists('idn_to_ascii') && defined('INTL_IDNA_VARIANT_UTS46') && $atpos = strpos($email, '@')) {
$email = static::substr($email, 0, ++$atpos)
. idn_to_ascii(static::substr($email, $atpos), 0, INTL_IDNA_VARIANT_UTS46);
}
return (bool) filter_var($email, FILTER_VALIDATE_EMAIL);
}
/**
* @param array|string $email
*
* @return array|string
*/
public function cleanEmail($email)
{
if (! is_array($email)) {
return preg_match('/\<(.*)\>/', $email, $match) ? $match[1] : $email;
}
$cleanEmail = [];
foreach ($email as $addy) {
$cleanEmail[] = preg_match('/\<(.*)\>/', $addy, $match) ? $match[1] : $addy;
}
return $cleanEmail;
}
/**
* Build alternative plain text message
*
* Provides the raw message for use in plain-text headers of
* HTML-formatted emails.
*
* If the user hasn't specified his own alternative message
* it creates one by stripping the HTML
*
* @return string
*/
protected function getAltMessage()
{
if (! empty($this->altMessage)) {
return ($this->wordWrap) ? $this->wordWrap($this->altMessage, 76) : $this->altMessage;
}
$body = preg_match('/\<body.*?\>(.*)\<\/body\>/si', $this->body, $match) ? $match[1] : $this->body;
$body = str_replace("\t", '', preg_replace('#<!--(.*)--\>#', '', trim(strip_tags($body))));
for ($i = 20; $i >= 3; $i--) {
$body = str_replace(str_repeat("\n", $i), "\n\n", $body);
}
$body = preg_replace('| +|', ' ', $body);
return ($this->wordWrap) ? $this->wordWrap($body, 76) : $body;
}
/**
* @param string $str
* @param int|null $charlim Line-length limit
*
* @return string
*/
public function wordWrap($str, $charlim = null)
{
if (empty($charlim)) {
$charlim = empty($this->wrapChars) ? 76 : $this->wrapChars;
}
if (strpos($str, "\r") !== false) {
$str = str_replace(["\r\n", "\r"], "\n", $str);
}
$str = preg_replace('| +\n|', "\n", $str);
$unwrap = [];
if (preg_match_all('|\{unwrap\}(.+?)\{/unwrap\}|s', $str, $matches)) {
for ($i = 0, $c = count($matches[0]); $i < $c; $i++) {
$unwrap[] = $matches[1][$i];
$str = str_replace($matches[0][$i], '{{unwrapped' . $i . '}}', $str);
}
}
// Use PHP's native function to do the initial wordwrap.
// We set the cut flag to FALSE so that any individual words that are
// too long get left alone. In the next step we'll deal with them.
$str = wordwrap($str, $charlim, "\n", false);
// Split the string into individual lines of text and cycle through them
$output = '';
foreach (explode("\n", $str) as $line) {
if (static::strlen($line) <= $charlim) {
$output .= $line . $this->newline;
continue;
}
$temp = '';
do {
if (preg_match('!\[url.+\]|://|www\.!', $line)) {
break;
}
$temp .= static::substr($line, 0, $charlim - 1);
$line = static::substr($line, $charlim - 1);
} while (static::strlen($line) > $charlim);
if ($temp !== '') {
$output .= $temp . $this->newline;
}
$output .= $line . $this->newline;
}
if ($unwrap) {
foreach ($unwrap as $key => $val) {
$output = str_replace('{{unwrapped' . $key . '}}', $val, $output);
}
}
return $output;
}
/**
* Build final headers
*/
protected function buildHeaders()
{
$this->setHeader('User-Agent', $this->userAgent);
$this->setHeader('X-Sender', $this->cleanEmail($this->headers['From']));
$this->setHeader('X-Mailer', $this->userAgent);
$this->setHeader('X-Priority', $this->priorities[$this->priority]);
$this->setHeader('Message-ID', $this->getMessageID());
$this->setHeader('Mime-Version', '1.0');
}
/**
* Write Headers as a string
*/
protected function writeHeaders()
{
if ($this->protocol === 'mail' && isset($this->headers['Subject'])) {
$this->subject = $this->headers['Subject'];
unset($this->headers['Subject']);
}
reset($this->headers);
$this->headerStr = '';
foreach ($this->headers as $key => $val) {
$val = trim($val);
if ($val !== '') {
$this->headerStr .= $key . ': ' . $val . $this->newline;
}
}
if ($this->getProtocol() === 'mail') {
$this->headerStr = rtrim($this->headerStr);
}
}
/**
* Build Final Body and attachments
*/
protected function buildMessage()
{
if ($this->wordWrap === true && $this->mailType !== 'html') {
$this->body = $this->wordWrap($this->body);
}
$this->writeHeaders();
$hdr = ($this->getProtocol() === 'mail') ? $this->newline : '';
$body = '';
switch ($this->getContentType()) {
case 'plain':
$hdr .= 'Content-Type: text/plain; charset='
. $this->charset
. $this->newline
. 'Content-Transfer-Encoding: '
. $this->getEncoding();
if ($this->getProtocol() === 'mail') {
$this->headerStr .= $hdr;
$this->finalBody = $this->body;
} else {
$this->finalBody = $hdr . $this->newline . $this->newline . $this->body;
}
return;
case 'html':
$boundary = uniqid('B_ALT_', true);
if ($this->sendMultipart === false) {
$hdr .= 'Content-Type: text/html; charset='
. $this->charset . $this->newline
. 'Content-Transfer-Encoding: quoted-printable';
} else {
$hdr .= 'Content-Type: multipart/alternative; boundary="' . $boundary . '"';
$body .= $this->getMimeMessage() . $this->newline . $this->newline
. '--' . $boundary . $this->newline
. 'Content-Type: text/plain; charset=' . $this->charset . $this->newline
. 'Content-Transfer-Encoding: ' . $this->getEncoding() . $this->newline . $this->newline
. $this->getAltMessage() . $this->newline . $this->newline
. '--' . $boundary . $this->newline
. 'Content-Type: text/html; charset=' . $this->charset . $this->newline
. 'Content-Transfer-Encoding: quoted-printable' . $this->newline . $this->newline;
}
$this->finalBody = $body . $this->prepQuotedPrintable($this->body) . $this->newline . $this->newline;
if ($this->getProtocol() === 'mail') {
$this->headerStr .= $hdr;
} else {
$this->finalBody = $hdr . $this->newline . $this->newline . $this->finalBody;
}
if ($this->sendMultipart !== false) {
$this->finalBody .= '--' . $boundary . '--';
}
return;
case 'plain-attach':
$boundary = uniqid('B_ATC_', true);
$hdr .= 'Content-Type: multipart/mixed; boundary="' . $boundary . '"';
if ($this->getProtocol() === 'mail') {
$this->headerStr .= $hdr;
}
$body .= $this->getMimeMessage() . $this->newline
. $this->newline
. '--' . $boundary . $this->newline
. 'Content-Type: text/plain; charset=' . $this->charset . $this->newline
. 'Content-Transfer-Encoding: ' . $this->getEncoding() . $this->newline
. $this->newline
. $this->body . $this->newline . $this->newline;
$this->appendAttachments($body, $boundary);
break;
case 'html-attach':
$altBoundary = uniqid('B_ALT_', true);
$lastBoundary = null;
if ($this->attachmentsHaveMultipart('mixed')) {
$atcBoundary = uniqid('B_ATC_', true);
$hdr .= 'Content-Type: multipart/mixed; boundary="' . $atcBoundary . '"';
$lastBoundary = $atcBoundary;
}
if ($this->attachmentsHaveMultipart('related')) {
$relBoundary = uniqid('B_REL_', true);
$relBoundaryHeader = 'Content-Type: multipart/related; boundary="' . $relBoundary . '"';
if (isset($lastBoundary)) {
$body .= '--' . $lastBoundary . $this->newline . $relBoundaryHeader;
} else {
$hdr .= $relBoundaryHeader;
}
$lastBoundary = $relBoundary;
}
if ($this->getProtocol() === 'mail') {
$this->headerStr .= $hdr;
}
static::strlen($body) && $body .= $this->newline . $this->newline;
$body .= $this->getMimeMessage() . $this->newline . $this->newline
. '--' . $lastBoundary . $this->newline
. 'Content-Type: multipart/alternative; boundary="' . $altBoundary . '"' . $this->newline . $this->newline
. '--' . $altBoundary . $this->newline
. 'Content-Type: text/plain; charset=' . $this->charset . $this->newline
. 'Content-Transfer-Encoding: ' . $this->getEncoding() . $this->newline . $this->newline
. $this->getAltMessage() . $this->newline . $this->newline
. '--' . $altBoundary . $this->newline
. 'Content-Type: text/html; charset=' . $this->charset . $this->newline
. 'Content-Transfer-Encoding: quoted-printable' . $this->newline . $this->newline
. $this->prepQuotedPrintable($this->body) . $this->newline . $this->newline
. '--' . $altBoundary . '--' . $this->newline . $this->newline;
if (! empty($relBoundary)) {
$body .= $this->newline . $this->newline;
$this->appendAttachments($body, $relBoundary, 'related');
}
// multipart/mixed attachments
if (! empty($atcBoundary)) {
$body .= $this->newline . $this->newline;
$this->appendAttachments($body, $atcBoundary, 'mixed');
}
break;
}
$this->finalBody = ($this->getProtocol() === 'mail') ? $body : $hdr . $this->newline . $this->newline . $body;
}
/**
* @param mixed $type
*
* @return bool
*/
protected function attachmentsHaveMultipart($type)
{
foreach ($this->attachments as &$attachment) {
if ($attachment['multipart'] === $type) {
return true;
}
}
return false;
}
/**
* @param string $body Message body to append to
* @param string $boundary Multipart boundary
* @param string|null $multipart When provided, only attachments of this type will be processed
*/
protected function appendAttachments(&$body, $boundary, $multipart = null)
{
foreach ($this->attachments as $attachment) {
if (isset($multipart) && $attachment['multipart'] !== $multipart) {
continue;
}
$name = $attachment['name'][1] ?? basename($attachment['name'][0]);
$body .= '--' . $boundary . $this->newline
. 'Content-Type: ' . $attachment['type'] . '; name="' . $name . '"' . $this->newline
. 'Content-Disposition: ' . $attachment['disposition'] . ';' . $this->newline
. 'Content-Transfer-Encoding: base64' . $this->newline
. (empty($attachment['cid']) ? '' : 'Content-ID: <' . $attachment['cid'] . '>' . $this->newline)
. $this->newline
. $attachment['content'] . $this->newline;
}
// $name won't be set if no attachments were appended,
// and therefore a boundary wouldn't be necessary
if (! empty($name)) {
$body .= '--' . $boundary . '--';
}
}
/**
* Prepares string for Quoted-Printable Content-Transfer-Encoding
* Refer to RFC 2045 http://www.ietf.org/rfc/rfc2045.txt
*
* @param string $str
*
* @return string
*/
protected function prepQuotedPrintable($str)
{
// ASCII code numbers for "safe" characters that can always be
// used literally, without encoding, as described in RFC 2049.
// http://www.ietf.org/rfc/rfc2049.txt
static $asciiSafeChars = [
// ' ( ) + , - . / : = ?
39,
40,
41,
43,
44,
45,
46,
47,
58,
61,
63,
// numbers
48,
49,
50,
51,
52,
53,
54,
55,
56,
57,
// upper-case letters
65,
66,
67,
68,
69,
70,
71,
72,
73,
74,
75,
76,
77,
78,
79,
80,
81,
82,
83,
84,
85,
86,
87,
88,
89,
90,
// lower-case letters
97,
98,
99,
100,
101,
102,
103,
104,
105,
106,
107,
108,
109,
110,
111,
112,
113,
114,
115,
116,
117,
118,
119,
120,
121,
122,
];
// We are intentionally wrapping so mail servers will encode characters
// properly and MUAs will behave, so {unwrap} must go!
$str = str_replace(['{unwrap}', '{/unwrap}'], '', $str);
// RFC 2045 specifies CRLF as "\r\n".
// However, many developers choose to override that and violate
// the RFC rules due to (apparently) a bug in MS Exchange,
// which only works with "\n".
if ($this->CRLF === "\r\n") {
return quoted_printable_encode($str);
}
// Reduce multiple spaces & remove nulls
$str = preg_replace(['| +|', '/\x00+/'], [' ', ''], $str);
// Standardize newlines
if (strpos($str, "\r") !== false) {
$str = str_replace(["\r\n", "\r"], "\n", $str);
}
$escape = '=';
$output = '';
foreach (explode("\n", $str) as $line) {
$length = static::strlen($line);
$temp = '';
// Loop through each character in the line to add soft-wrap
// characters at the end of a line " =\r\n" and add the newly
// processed line(s) to the output (see comment on $crlf class property)
for ($i = 0; $i < $length; $i++) {
// Grab the next character
$char = $line[$i];
$ascii = ord($char);
// Convert spaces and tabs but only if it's the end of the line
if ($ascii === 32 || $ascii === 9) {
if ($i === ($length - 1)) {
$char = $escape . sprintf('%02s', dechex($ascii));
}
}
// DO NOT move this below the $ascii_safe_chars line!
//
// = (equals) signs are allowed by RFC2049, but must be encoded
// as they are the encoding delimiter!
elseif ($ascii === 61) {
$char = $escape . strtoupper(sprintf('%02s', dechex($ascii))); // =3D
} elseif (! in_array($ascii, $asciiSafeChars, true)) {
$char = $escape . strtoupper(sprintf('%02s', dechex($ascii)));
}
// If we're at the character limit, add the line to the output,
// reset our temp variable, and keep on chuggin'
if ((static::strlen($temp) + static::strlen($char)) >= 76) {
$output .= $temp . $escape . $this->CRLF;
$temp = '';
}
// Add the character to our temporary line
$temp .= $char;
}
// Add our completed line to the output
$output .= $temp . $this->CRLF;
}
// get rid of extra CRLF tacked onto the end
return static::substr($output, 0, static::strlen($this->CRLF) * -1);
}
/**
* Performs "Q Encoding" on a string for use in email headers.
* It's related but not identical to quoted-printable, so it has its
* own method.
*
* @param string $str
*
* @return string
*/
protected function prepQEncoding($str)
{
$str = str_replace(["\r", "\n"], '', $str);
if ($this->charset === 'UTF-8') {
// Note: We used to have mb_encode_mimeheader() as the first choice
// here, but it turned out to be buggy and unreliable. DO NOT
// re-add it! -- Narf
if (extension_loaded('iconv')) {
$output = @iconv_mime_encode('', $str, [
'scheme' => 'Q',
'line-length' => 76,
'input-charset' => $this->charset,
'output-charset' => $this->charset,
'line-break-chars' => $this->CRLF,
]);
// There are reports that iconv_mime_encode() might fail and return FALSE
if ($output !== false) {
// iconv_mime_encode() will always put a header field name.
// We've passed it an empty one, but it still prepends our
// encoded string with ': ', so we need to strip it.
return static::substr($output, 2);
}
$chars = iconv_strlen($str, 'UTF-8');
} elseif (extension_loaded('mbstring')) {
$chars = mb_strlen($str, 'UTF-8');
}
}
// We might already have this set for UTF-8
if (! isset($chars)) {
$chars = static::strlen($str);
}
$output = '=?' . $this->charset . '?Q?';
for ($i = 0, $length = static::strlen($output); $i < $chars; $i++) {
$chr = ($this->charset === 'UTF-8' && extension_loaded('iconv')) ? '=' . implode('=', str_split(strtoupper(bin2hex(iconv_substr($str, $i, 1, $this->charset))), 2)) : '=' . strtoupper(bin2hex($str[$i]));
// RFC 2045 sets a limit of 76 characters per line.
// We'll append ?= to the end of each line though.
if ($length + ($l = static::strlen($chr)) > 74) {
$output .= '?=' . $this->CRLF // EOL
. ' =?' . $this->charset . '?Q?' . $chr; // New line
$length = 6 + static::strlen($this->charset) + $l; // Reset the length for the new line
} else {
$output .= $chr;
$length += $l;
}
}
// End the header
return $output . '?=';
}
/**
* @param bool $autoClear
*
* @return bool
*/
public function send($autoClear = true)
{
if (! isset($this->headers['From']) && ! empty($this->fromEmail)) {
$this->setFrom($this->fromEmail, $this->fromName);
}
if (! isset($this->headers['From'])) {
$this->setErrorMessage(lang('Email.noFrom'));
return false;
}
if ($this->replyToFlag === false) {
$this->setReplyTo($this->headers['From']);
}
if (empty($this->recipients) && ! isset($this->headers['To']) && empty($this->BCCArray) && ! isset($this->headers['Bcc']) && ! isset($this->headers['Cc'])) {
$this->setErrorMessage(lang('Email.noRecipients'));
return false;
}
$this->buildHeaders();
if ($this->BCCBatchMode && count($this->BCCArray) > $this->BCCBatchSize) {
$this->batchBCCSend();
if ($autoClear) {
$this->clear();
}
return true;
}
$this->buildMessage();
$result = $this->spoolEmail();
if ($result) {
$this->setArchiveValues();
if ($autoClear) {
$this->clear();
}
Events::trigger('email', $this->archive);
}
return $result;
}
/**
* Batch Bcc Send. Sends groups of BCCs in batches
*/
public function batchBCCSend()
{
$float = $this->BCCBatchSize - 1;
$set = '';
$chunk = [];
for ($i = 0, $c = count($this->BCCArray); $i < $c; $i++) {
if (isset($this->BCCArray[$i])) {
$set .= ', ' . $this->BCCArray[$i];
}
if ($i === $float) {
$chunk[] = static::substr($set, 1);
$float += $this->BCCBatchSize;
$set = '';
}
if ($i === $c - 1) {
$chunk[] = static::substr($set, 1);
}
}
for ($i = 0, $c = count($chunk); $i < $c; $i++) {
unset($this->headers['Bcc']);
$bcc = $this->cleanEmail($this->stringToArray($chunk[$i]));
if ($this->protocol !== 'smtp') {
$this->setHeader('Bcc', implode(', ', $bcc));
} else {
$this->BCCArray = $bcc;
}
$this->buildMessage();
$this->spoolEmail();
}
// Update the archive
$this->setArchiveValues();
Events::trigger('email', $this->archive);
}
/**
* Unwrap special elements
*/
protected function unwrapSpecials()
{
$this->finalBody = preg_replace_callback(
'/\{unwrap\}(.*?)\{\/unwrap\}/si',
[
$this,
'removeNLCallback',
],
$this->finalBody
);
}
/**
* Strip line-breaks via callback
*
* @param string $matches
*
* @return string
*/
protected function removeNLCallback($matches)
{
if (strpos($matches[1], "\r") !== false || strpos($matches[1], "\n") !== false) {
$matches[1] = str_replace(["\r\n", "\r", "\n"], '', $matches[1]);
}
return $matches[1];
}
/**
* Spool mail to the mail server
*
* @return bool
*/
protected function spoolEmail()
{
$this->unwrapSpecials();
$protocol = $this->getProtocol();
$method = 'sendWith' . ucfirst($protocol);
try {
$success = $this->{$method}();
} catch (ErrorException $e) {
$success = false;
log_message('error', 'Email: ' . $method . ' throwed ' . $e->getMessage());
}
if (! $success) {
$this->setErrorMessage(lang('Email.sendFailure' . ($protocol === 'mail' ? 'PHPMail' : ucfirst($protocol))));
return false;
}
$this->setErrorMessage(lang('Email.sent', [$protocol]));
return true;
}
/**
* Validate email for shell
*
* Applies stricter, shell-safe validation to email addresses.
* Introduced to prevent RCE via sendmail's -f option.
*
* @see https://github.com/codeigniter4/CodeIgniter/issues/4963
* @see https://gist.github.com/Zenexer/40d02da5e07f151adeaeeaa11af9ab36
*
* @license https://creativecommons.org/publicdomain/zero/1.0/ CC0 1.0, Public Domain
*
* Credits for the base concept go to Paul Buonopane <paul@namepros.com>
*
* @param string $email
*
* @return bool
*/
protected function validateEmailForShell(&$email)
{
if (function_exists('idn_to_ascii') && $atpos = strpos($email, '@')) {
$email = static::substr($email, 0, ++$atpos)
. idn_to_ascii(static::substr($email, $atpos), 0, INTL_IDNA_VARIANT_UTS46);
}
return filter_var($email, FILTER_VALIDATE_EMAIL) === $email && preg_match('#\A[a-z0-9._+-]+@[a-z0-9.-]{1,253}\z#i', $email);
}
/**
* Send using mail()
*
* @return bool
*/
protected function sendWithMail()
{
$recipients = is_array($this->recipients) ? implode(', ', $this->recipients) : $this->recipients;
// _validate_email_for_shell() below accepts by reference,
// so this needs to be assigned to a variable
$from = $this->cleanEmail($this->headers['Return-Path']);
if (! $this->validateEmailForShell($from)) {
return mail($recipients, $this->subject, $this->finalBody, $this->headerStr);
}
// most documentation of sendmail using the "-f" flag lacks a space after it, however
// we've encountered servers that seem to require it to be in place.
return mail($recipients, $this->subject, $this->finalBody, $this->headerStr, '-f ' . $from);
}
/**
* Send using Sendmail
*
* @return bool
*/
protected function sendWithSendmail()
{
// _validate_email_for_shell() below accepts by reference,
// so this needs to be assigned to a variable
$from = $this->cleanEmail($this->headers['From']);
$from = $this->validateEmailForShell($from) ? '-f ' . $from : '';
if (! function_usable('popen') || false === ($fp = @popen($this->mailPath . ' -oi ' . $from . ' -t', 'w'))) {
return false;
}
fwrite($fp, $this->headerStr);
fwrite($fp, $this->finalBody);
$status = pclose($fp);
if ($status !== 0) {
$this->setErrorMessage(lang('Email.exitStatus', [$status]));
$this->setErrorMessage(lang('Email.noSocket'));
return false;
}
return true;
}
/**
* Send using SMTP
*
* @return bool
*/
protected function sendWithSmtp()
{
if ($this->SMTPHost === '') {
$this->setErrorMessage(lang('Email.noHostname'));
return false;
}
if (! $this->SMTPConnect() || ! $this->SMTPAuthenticate()) {
return false;
}
if (! $this->sendCommand('from', $this->cleanEmail($this->headers['From']))) {
$this->SMTPEnd();
return false;
}
foreach ($this->recipients as $val) {
if (! $this->sendCommand('to', $val)) {
$this->SMTPEnd();
return false;
}
}
foreach ($this->CCArray as $val) {
if ($val !== '' && ! $this->sendCommand('to', $val)) {
$this->SMTPEnd();
return false;
}
}
foreach ($this->BCCArray as $val) {
if ($val !== '' && ! $this->sendCommand('to', $val)) {
$this->SMTPEnd();
return false;
}
}
if (! $this->sendCommand('data')) {
$this->SMTPEnd();
return false;
}
// perform dot transformation on any lines that begin with a dot
$this->sendData($this->headerStr . preg_replace('/^\./m', '..$1', $this->finalBody));
$this->sendData($this->newline . '.');
$reply = $this->getSMTPData();
$this->setErrorMessage($reply);
$this->SMTPEnd();
if (strpos($reply, '250') !== 0) {
$this->setErrorMessage(lang('Email.SMTPError', [$reply]));
return false;
}
return true;
}
/**
* Shortcut to send RSET or QUIT depending on keep-alive
*/
protected function SMTPEnd()
{
$this->sendCommand($this->SMTPKeepAlive ? 'reset' : 'quit');
}
/**
* @return bool|string
*/
protected function SMTPConnect()
{
if (is_resource($this->SMTPConnect)) {
return true;
}
$ssl = '';
if ($this->SMTPPort === 465) {
$ssl = 'tls://';
} elseif ($this->SMTPCrypto === 'ssl') {
$ssl = 'ssl://';
}
$this->SMTPConnect = fsockopen(
$ssl . $this->SMTPHost,
$this->SMTPPort,
$errno,
$errstr,
$this->SMTPTimeout
);
if (! is_resource($this->SMTPConnect)) {
$this->setErrorMessage(lang('Email.SMTPError', [$errno . ' ' . $errstr]));
return false;
}
stream_set_timeout($this->SMTPConnect, $this->SMTPTimeout);
$this->setErrorMessage($this->getSMTPData());
if ($this->SMTPCrypto === 'tls') {
$this->sendCommand('hello');
$this->sendCommand('starttls');
$crypto = stream_socket_enable_crypto(
$this->SMTPConnect,
true,
STREAM_CRYPTO_METHOD_TLSv1_0_CLIENT | STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT | STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT
);
if ($crypto !== true) {
$this->setErrorMessage(lang('Email.SMTPError', [$this->getSMTPData()]));
return false;
}
}
return $this->sendCommand('hello');
}
/**
* @param string $cmd
* @param string $data
*
* @return bool
*/
protected function sendCommand($cmd, $data = '')
{
switch ($cmd) {
case 'hello':
if ($this->SMTPAuth || $this->getEncoding() === '8bit') {
$this->sendData('EHLO ' . $this->getHostname());
} else {
$this->sendData('HELO ' . $this->getHostname());
}
$resp = 250;
break;
case 'starttls':
$this->sendData('STARTTLS');
$resp = 220;
break;
case 'from':
$this->sendData('MAIL FROM:<' . $data . '>');
$resp = 250;
break;
case 'to':
if ($this->DSN) {
$this->sendData('RCPT TO:<' . $data . '> NOTIFY=SUCCESS,DELAY,FAILURE ORCPT=rfc822;' . $data);
} else {
$this->sendData('RCPT TO:<' . $data . '>');
}
$resp = 250;
break;
case 'data':
$this->sendData('DATA');
$resp = 354;
break;
case 'reset':
$this->sendData('RSET');
$resp = 250;
break;
case 'quit':
$this->sendData('QUIT');
$resp = 221;
break;
default:
$resp = null;
}
$reply = $this->getSMTPData();
$this->debugMessage[] = '<pre>' . $cmd . ': ' . $reply . '</pre>';
if ($resp === null || ((int) static::substr($reply, 0, 3) !== $resp)) {
$this->setErrorMessage(lang('Email.SMTPError', [$reply]));
return false;
}
if ($cmd === 'quit') {
fclose($this->SMTPConnect);
}
return true;
}
/**
* @return bool
*/
protected function SMTPAuthenticate()
{
if (! $this->SMTPAuth) {
return true;
}
if ($this->SMTPUser === '' && $this->SMTPPass === '') {
$this->setErrorMessage(lang('Email.noSMTPAuth'));
return false;
}
$this->sendData('AUTH LOGIN');
$reply = $this->getSMTPData();
if (strpos($reply, '503') === 0) { // Already authenticated
return true;
}
if (strpos($reply, '334') !== 0) {
$this->setErrorMessage(lang('Email.failedSMTPLogin', [$reply]));
return false;
}
$this->sendData(base64_encode($this->SMTPUser));
$reply = $this->getSMTPData();
if (strpos($reply, '334') !== 0) {
$this->setErrorMessage(lang('Email.SMTPAuthUsername', [$reply]));
return false;
}
$this->sendData(base64_encode($this->SMTPPass));
$reply = $this->getSMTPData();
if (strpos($reply, '235') !== 0) {
$this->setErrorMessage(lang('Email.SMTPAuthPassword', [$reply]));
return false;
}
if ($this->SMTPKeepAlive) {
$this->SMTPAuth = false;
}
return true;
}
/**
* @param string $data
*
* @return bool
*/
protected function sendData($data)
{
$data .= $this->newline;
$result = null;
for ($written = $timestamp = 0, $length = static::strlen($data); $written < $length; $written += $result) {
if (($result = fwrite($this->SMTPConnect, static::substr($data, $written))) === false) {
break;
}
// See https://bugs.php.net/bug.php?id=39598 and http://php.net/manual/en/function.fwrite.php#96951
if ($result === 0) {
if ($timestamp === 0) {
$timestamp = time();
} elseif ($timestamp < (time() - $this->SMTPTimeout)) {
$result = false;
break;
}
usleep(250000);
continue;
}
$timestamp = 0;
}
if (! is_int($result)) {
$this->setErrorMessage(lang('Email.SMTPDataFailure', [$data]));
return false;
}
return true;
}
/**
* @return string
*/
protected function getSMTPData()
{
$data = '';
while ($str = fgets($this->SMTPConnect, 512)) {
$data .= $str;
if ($str[3] === ' ') {
break;
}
}
return $data;
}
/**
* There are only two legal types of hostname - either a fully
* qualified domain name (eg: "mail.example.com") or an IP literal
* (eg: "[1.2.3.4]").
*
* @see https://tools.ietf.org/html/rfc5321#section-2.3.5
* @see http://cbl.abuseat.org/namingproblems.html
*
* @return string
*/
protected function getHostname()
{
if (isset($_SERVER['SERVER_NAME'])) {
return $_SERVER['SERVER_NAME'];
}
if (isset($_SERVER['SERVER_ADDR'])) {
return '[' . $_SERVER['SERVER_ADDR'] . ']';
}
return '[127.0.0.1]';
}
/**
* @param array $include List of raw data chunks to include in the output
* Valid options are: 'headers', 'subject', 'body'
*
* @return string
*/
public function printDebugger($include = ['headers', 'subject', 'body'])
{
$msg = implode('', $this->debugMessage);
// Determine which parts of our raw data needs to be printed
$rawData = '';
if (! is_array($include)) {
$include = [$include];
}
if (in_array('headers', $include, true)) {
$rawData = htmlspecialchars($this->headerStr) . "\n";
}
if (in_array('subject', $include, true)) {
$rawData .= htmlspecialchars($this->subject) . "\n";
}
if (in_array('body', $include, true)) {
$rawData .= htmlspecialchars($this->finalBody);
}
return $msg . ($rawData === '' ? '' : '<pre>' . $rawData . '</pre>');
}
/**
* @param string $msg
*/
protected function setErrorMessage($msg)
{
$this->debugMessage[] = $msg . '<br />';
}
/**
* Mime Types
*
* @param string $ext
*
* @return string
*/
protected function mimeTypes($ext = '')
{
$mime = Mimes::guessTypeFromExtension(strtolower($ext));
return ! empty($mime) ? $mime : 'application/x-unknown-content-type';
}
public function __destruct()
{
if (is_resource($this->SMTPConnect)) {
$this->sendCommand('quit');
}
}
/**
* Byte-safe strlen()
*
* @param string $str
*
* @return int
*/
protected static function strlen($str)
{
return (static::$func_overload) ? mb_strlen($str, '8bit') : strlen($str);
}
/**
* Byte-safe substr()
*
* @param string $str
* @param int $start
* @param int|null $length
*
* @return string
*/
protected static function substr($str, $start, $length = null)
{
if (static::$func_overload) {
return mb_substr($str, $start, $length, '8bit');
}
return isset($length) ? substr($str, $start, $length) : substr($str, $start);
}
/**
* Determines the values that should be stored in $archive.
*
* @return array The updated archive values
*/
protected function setArchiveValues(): array
{
// Get property values and add anything prepped in tmpArchive
$this->archive = array_merge(get_object_vars($this), $this->tmpArchive);
unset($this->archive['archive']);
// Clear tmpArchive for next run
$this->tmpArchive = [];
return $this->archive;
}
}
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