Edit File by line

* @see hello()

[500] Fix | Delete

[501] Fix | Delete

* @param string $username The user name

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* @param string $password The password

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* @param string $authtype The auth type (CRAM-MD5, PLAIN, LOGIN, XOAUTH2)

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* @param OAuthTokenProvider $OAuth An optional OAuthTokenProvider instance for XOAUTH2 authentication

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[506] Fix | Delete

* @return bool True if successfully authenticated

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[508] Fix | Delete

public function authenticate(

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$username,

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$password,

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$authtype = null,

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$OAuth = null

[513] Fix | Delete

) {

[514] Fix | Delete

if (!$this->server_caps) {

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$this->setError('Authentication is not allowed before HELO/EHLO');

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return false;

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}

[519] Fix | Delete

[520] Fix | Delete

if (array_key_exists('EHLO', $this->server_caps)) {

[521] Fix | Delete

//SMTP extensions are available; try to find a proper authentication method

[522] Fix | Delete

if (!array_key_exists('AUTH', $this->server_caps)) {

[523] Fix | Delete

$this->setError('Authentication is not allowed at this stage');

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//'at this stage' means that auth may be allowed after the stage changes

[525] Fix | Delete

//e.g. after STARTTLS

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return false;

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}

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$this->edebug('Auth method requested: ' . ($authtype ?: 'UNSPECIFIED'), self::DEBUG_LOWLEVEL);

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$this->edebug(

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'Auth methods available on the server: ' . implode(',', $this->server_caps['AUTH']),

[533] Fix | Delete

self::DEBUG_LOWLEVEL

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);

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[536] Fix | Delete

//If we have requested a specific auth type, check the server supports it before trying others

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if (null !== $authtype && !in_array($authtype, $this->server_caps['AUTH'], true)) {

[538] Fix | Delete

$this->edebug('Requested auth method not available: ' . $authtype, self::DEBUG_LOWLEVEL);

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$authtype = null;

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}

[541] Fix | Delete

[542] Fix | Delete

if (empty($authtype)) {

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//If no auth mechanism is specified, attempt to use these, in this order

[544] Fix | Delete

//Try CRAM-MD5 first as it's more secure than the others

[545] Fix | Delete

foreach (['CRAM-MD5', 'LOGIN', 'PLAIN', 'XOAUTH2'] as $method) {

[546] Fix | Delete

if (in_array($method, $this->server_caps['AUTH'], true)) {

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$authtype = $method;

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break;

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}

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}

[551] Fix | Delete

if (empty($authtype)) {

[552] Fix | Delete

$this->setError('No supported authentication methods found');

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return false;

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}

[556] Fix | Delete

$this->edebug('Auth method selected: ' . $authtype, self::DEBUG_LOWLEVEL);

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}

[558] Fix | Delete

[559] Fix | Delete

if (!in_array($authtype, $this->server_caps['AUTH'], true)) {

[560] Fix | Delete

$this->setError("The requested authentication method \"$authtype\" is not supported by the server");

[561] Fix | Delete

[562] Fix | Delete

return false;

[563] Fix | Delete

}

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} elseif (empty($authtype)) {

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$authtype = 'LOGIN';

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}

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switch ($authtype) {

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case 'PLAIN':

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//Start authentication

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if (!$this->sendCommand('AUTH', 'AUTH PLAIN', 334)) {

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return false;

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}

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//Send encoded username and password

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if (

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//Format from https://tools.ietf.org/html/rfc4616#section-2

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//We skip the first field (it's forgery), so the string starts with a null byte

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!$this->sendCommand(

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'User & Password',

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base64_encode("\0" . $username . "\0" . $password),

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235

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)

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) {

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return false;

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}

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break;

[586] Fix | Delete

case 'LOGIN':

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//Start authentication

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if (!$this->sendCommand('AUTH', 'AUTH LOGIN', 334)) {

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return false;

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}

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if (!$this->sendCommand('Username', base64_encode($username), 334)) {

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return false;

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}

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if (!$this->sendCommand('Password', base64_encode($password), 235)) {

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return false;

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}

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break;

[598] Fix | Delete

case 'CRAM-MD5':

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//Start authentication

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if (!$this->sendCommand('AUTH CRAM-MD5', 'AUTH CRAM-MD5', 334)) {

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return false;

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}

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//Get the challenge

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$challenge = base64_decode(substr($this->last_reply, 4));

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//Build the response

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$response = $username . ' ' . $this->hmac($challenge, $password);

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//send encoded credentials

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return $this->sendCommand('Username', base64_encode($response), 235);

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case 'XOAUTH2':

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//The OAuth instance must be set up prior to requesting auth.

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if (null === $OAuth) {

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return false;

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}

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$oauth = $OAuth->getOauth64();

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//Start authentication

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if (!$this->sendCommand('AUTH', 'AUTH XOAUTH2 ' . $oauth, 235)) {

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return false;

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}

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break;

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default:

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$this->setError("Authentication method \"$authtype\" is not supported");

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return false;

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}

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[629] Fix | Delete

return true;

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}

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[632] Fix | Delete

/**

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* Calculate an MD5 HMAC hash.

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* Works like hash_hmac('md5', $data, $key)

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* in case that function is not available.

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* @param string $data The data to hash

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* @param string $key The key to hash with

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* @return string

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protected function hmac($data, $key)

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{

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if (function_exists('hash_hmac')) {

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return hash_hmac('md5', $data, $key);

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}

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//The following borrowed from

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//http://php.net/manual/en/function.mhash.php#27225

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//RFC 2104 HMAC implementation for php.

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//Creates an md5 HMAC.

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//Eliminates the need to install mhash to compute a HMAC

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//by Lance Rushing

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[656] Fix | Delete

$bytelen = 64; //byte length for md5

[657] Fix | Delete

if (strlen($key) > $bytelen) {

[658] Fix | Delete

$key = pack('H*', md5($key));

[659] Fix | Delete

}

[660] Fix | Delete

$key = str_pad($key, $bytelen, chr(0x00));

[661] Fix | Delete

$ipad = str_pad('', $bytelen, chr(0x36));

[662] Fix | Delete

$opad = str_pad('', $bytelen, chr(0x5c));

[663] Fix | Delete

$k_ipad = $key ^ $ipad;

[664] Fix | Delete

$k_opad = $key ^ $opad;

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return md5($k_opad . pack('H*', md5($k_ipad . $data)));

[667] Fix | Delete

}

[668] Fix | Delete

[669] Fix | Delete

/**

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* Check connection state.

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[672] Fix | Delete

* @return bool True if connected

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[674] Fix | Delete

public function connected()

[675] Fix | Delete

{

[676] Fix | Delete

if (is_resource($this->smtp_conn)) {

[677] Fix | Delete

$sock_status = stream_get_meta_data($this->smtp_conn);

[678] Fix | Delete

if ($sock_status['eof']) {

[679] Fix | Delete

//The socket is valid but we are not connected

[680] Fix | Delete

$this->edebug(

[681] Fix | Delete

'SMTP NOTICE: EOF caught while checking if connected',

[682] Fix | Delete

self::DEBUG_CLIENT

[683] Fix | Delete

);

[684] Fix | Delete

$this->close();

[685] Fix | Delete

[686] Fix | Delete

return false;

[687] Fix | Delete

}

[688] Fix | Delete

[689] Fix | Delete

return true; //everything looks good

[690] Fix | Delete

}

[691] Fix | Delete

[692] Fix | Delete

return false;

[693] Fix | Delete

}

[694] Fix | Delete

[695] Fix | Delete

/**

[696] Fix | Delete

* Close the socket and clean up the state of the class.

[697] Fix | Delete

* Don't use this function without first trying to use QUIT.

[698] Fix | Delete

[699] Fix | Delete

* @see quit()

[700] Fix | Delete

[701] Fix | Delete

public function close()

[702] Fix | Delete

{

[703] Fix | Delete

$this->server_caps = null;

[704] Fix | Delete

$this->helo_rply = null;

[705] Fix | Delete

if (is_resource($this->smtp_conn)) {

[706] Fix | Delete

//Close the connection and cleanup

[707] Fix | Delete

fclose($this->smtp_conn);

[708] Fix | Delete

$this->smtp_conn = null; //Makes for cleaner serialization

[709] Fix | Delete

$this->edebug('Connection: closed', self::DEBUG_CONNECTION);

[710] Fix | Delete

}

[711] Fix | Delete

}

[712] Fix | Delete

[713] Fix | Delete

/**

[714] Fix | Delete

* Send an SMTP DATA command.

[715] Fix | Delete

* Issues a data command and sends the msg_data to the server,

[716] Fix | Delete

* finalizing the mail transaction. $msg_data is the message

[717] Fix | Delete

* that is to be sent with the headers. Each header needs to be

[718] Fix | Delete

* on a single line followed by a <CRLF> with the message headers

[719] Fix | Delete

* and the message body being separated by an additional <CRLF>.

[720] Fix | Delete

* Implements RFC 821: DATA <CRLF>.

[721] Fix | Delete

[722] Fix | Delete

* @param string $msg_data Message data to send

[723] Fix | Delete

[724] Fix | Delete

* @return bool

[725] Fix | Delete

[726] Fix | Delete

public function data($msg_data)

[727] Fix | Delete

{

[728] Fix | Delete

//This will use the standard timelimit

[729] Fix | Delete

if (!$this->sendCommand('DATA', 'DATA', 354)) {

[730] Fix | Delete

return false;

[731] Fix | Delete

}

[732] Fix | Delete

[733] Fix | Delete

/* The server is ready to accept data!

[734] Fix | Delete

* According to rfc821 we should not send more than 1000 characters on a single line (including the LE)

[735] Fix | Delete

* so we will break the data up into lines by \r and/or \n then if needed we will break each of those into

[736] Fix | Delete

* smaller lines to fit within the limit.

[737] Fix | Delete

* We will also look for lines that start with a '.' and prepend an additional '.'.

[738] Fix | Delete

* NOTE: this does not count towards line-length limit.

[739] Fix | Delete

[740] Fix | Delete

[741] Fix | Delete

//Normalize line breaks before exploding

[742] Fix | Delete

$lines = explode("\n", str_replace(["\r\n", "\r"], "\n", $msg_data));

[743] Fix | Delete

[744] Fix | Delete

/* To distinguish between a complete RFC822 message and a plain message body, we check if the first field

[745] Fix | Delete

* of the first line (':' separated) does not contain a space then it _should_ be a header, and we will

[746] Fix | Delete

* process all lines before a blank line as headers.

[747] Fix | Delete

[748] Fix | Delete

[749] Fix | Delete

$field = substr($lines[0], 0, strpos($lines[0], ':'));

[750] Fix | Delete

$in_headers = false;

[751] Fix | Delete

if (!empty($field) && strpos($field, ' ') === false) {

[752] Fix | Delete

$in_headers = true;

[753] Fix | Delete

}

[754] Fix | Delete

[755] Fix | Delete

foreach ($lines as $line) {

[756] Fix | Delete

$lines_out = [];

[757] Fix | Delete

if ($in_headers && $line === '') {

[758] Fix | Delete

$in_headers = false;

[759] Fix | Delete

}

[760] Fix | Delete

//Break this line up into several smaller lines if it's too long

[761] Fix | Delete

//Micro-optimisation: isset($str[$len]) is faster than (strlen($str) > $len),

[762] Fix | Delete

while (isset($line[self::MAX_LINE_LENGTH])) {

[763] Fix | Delete

//Working backwards, try to find a space within the last MAX_LINE_LENGTH chars of the line to break on

[764] Fix | Delete

//so as to avoid breaking in the middle of a word

[765] Fix | Delete

$pos = strrpos(substr($line, 0, self::MAX_LINE_LENGTH), ' ');

[766] Fix | Delete

//Deliberately matches both false and 0

[767] Fix | Delete

if (!$pos) {

[768] Fix | Delete

//No nice break found, add a hard break

[769] Fix | Delete

$pos = self::MAX_LINE_LENGTH - 1;

[770] Fix | Delete

$lines_out[] = substr($line, 0, $pos);

[771] Fix | Delete

$line = substr($line, $pos);

[772] Fix | Delete

} else {

[773] Fix | Delete

//Break at the found point

[774] Fix | Delete

$lines_out[] = substr($line, 0, $pos);

[775] Fix | Delete

//Move along by the amount we dealt with

[776] Fix | Delete

$line = substr($line, $pos + 1);

[777] Fix | Delete

}

[778] Fix | Delete

//If processing headers add a LWSP-char to the front of new line RFC822 section 3.1.1

[779] Fix | Delete

if ($in_headers) {

[780] Fix | Delete

$line = "\t" . $line;

[781] Fix | Delete

}

[782] Fix | Delete

}

[783] Fix | Delete

$lines_out[] = $line;

[784] Fix | Delete

[785] Fix | Delete

//Send the lines to the server

[786] Fix | Delete

foreach ($lines_out as $line_out) {

[787] Fix | Delete

//Dot-stuffing as per RFC5321 section 4.5.2

[788] Fix | Delete

//https://tools.ietf.org/html/rfc5321#section-4.5.2

[789] Fix | Delete

if (!empty($line_out) && $line_out[0] === '.') {

[790] Fix | Delete

$line_out = '.' . $line_out;

[791] Fix | Delete

}

[792] Fix | Delete

$this->client_send($line_out . static::LE, 'DATA');

[793] Fix | Delete

}

[794] Fix | Delete

}

[795] Fix | Delete

[796] Fix | Delete

//Message data has been sent, complete the command

[797] Fix | Delete

//Increase timelimit for end of DATA command

[798] Fix | Delete

$savetimelimit = $this->Timelimit;

[799] Fix | Delete

$this->Timelimit *= 2;

[800] Fix | Delete

$result = $this->sendCommand('DATA END', '.', 250);

[801] Fix | Delete

$this->recordLastTransactionID();

[802] Fix | Delete

//Restore timelimit

[803] Fix | Delete

$this->Timelimit = $savetimelimit;

[804] Fix | Delete

[805] Fix | Delete

return $result;

[806] Fix | Delete

}

[807] Fix | Delete

[808] Fix | Delete

/**

[809] Fix | Delete

* Send an SMTP HELO or EHLO command.

[810] Fix | Delete

* Used to identify the sending server to the receiving server.

[811] Fix | Delete

* This makes sure that client and server are in a known state.

[812] Fix | Delete

* Implements RFC 821: HELO <SP> <domain> <CRLF>

[813] Fix | Delete

* and RFC 2821 EHLO.

[814] Fix | Delete

[815] Fix | Delete

* @param string $host The host name or IP to connect to

[816] Fix | Delete

[817] Fix | Delete

* @return bool

[818] Fix | Delete

[819] Fix | Delete

public function hello($host = '')

[820] Fix | Delete

{

[821] Fix | Delete

//Try extended hello first (RFC 2821)

[822] Fix | Delete

if ($this->sendHello('EHLO', $host)) {

[823] Fix | Delete

return true;

[824] Fix | Delete

}

[825] Fix | Delete

[826] Fix | Delete

//Some servers shut down the SMTP service here (RFC 5321)

[827] Fix | Delete

if (substr($this->helo_rply, 0, 3) == '421') {

[828] Fix | Delete

return false;

[829] Fix | Delete

}

[830] Fix | Delete

[831] Fix | Delete

return $this->sendHello('HELO', $host);

[832] Fix | Delete

}

[833] Fix | Delete

[834] Fix | Delete

/**

[835] Fix | Delete

* Send an SMTP HELO or EHLO command.

[836] Fix | Delete

* Low-level implementation used by hello().

[837] Fix | Delete

[838] Fix | Delete

* @param string $hello The HELO string

[839] Fix | Delete

* @param string $host The hostname to say we are

[840] Fix | Delete

[841] Fix | Delete

* @return bool

[842] Fix | Delete

[843] Fix | Delete

* @see hello()

[844] Fix | Delete

[845] Fix | Delete

protected function sendHello($hello, $host)

[846] Fix | Delete

{

[847] Fix | Delete

$noerror = $this->sendCommand($hello, $hello . ' ' . $host, 250);

[848] Fix | Delete

$this->helo_rply = $this->last_reply;

[849] Fix | Delete

if ($noerror) {

[850] Fix | Delete

$this->parseHelloFields($hello);

[851] Fix | Delete

} else {

[852] Fix | Delete

$this->server_caps = null;

[853] Fix | Delete

}

[854] Fix | Delete

[855] Fix | Delete

return $noerror;

[856] Fix | Delete

}

[857] Fix | Delete

[858] Fix | Delete

/**

[859] Fix | Delete

* Parse a reply to HELO/EHLO command to discover server extensions.

[860] Fix | Delete

* In case of HELO, the only parameter that can be discovered is a server name.

[861] Fix | Delete

[862] Fix | Delete

* @param string $type `HELO` or `EHLO`

[863] Fix | Delete

[864] Fix | Delete

protected function parseHelloFields($type)

[865] Fix | Delete

{

[866] Fix | Delete

$this->server_caps = [];

[867] Fix | Delete

$lines = explode("\n", $this->helo_rply);

[868] Fix | Delete

[869] Fix | Delete

foreach ($lines as $n => $s) {

[870] Fix | Delete

//First 4 chars contain response code followed by - or space

[871] Fix | Delete

$s = trim(substr($s, 4));

[872] Fix | Delete

if (empty($s)) {

[873] Fix | Delete

continue;

[874] Fix | Delete

}

[875] Fix | Delete

$fields = explode(' ', $s);

[876] Fix | Delete

if (!empty($fields)) {

[877] Fix | Delete

if (!$n) {

[878] Fix | Delete

$name = $type;

[879] Fix | Delete

$fields = $fields[0];

[880] Fix | Delete

} else {

[881] Fix | Delete

$name = array_shift($fields);

[882] Fix | Delete

switch ($name) {

[883] Fix | Delete

case 'SIZE':

[884] Fix | Delete

$fields = ($fields ? $fields[0] : 0);

[885] Fix | Delete

break;

[886] Fix | Delete

case 'AUTH':

[887] Fix | Delete

if (!is_array($fields)) {

[888] Fix | Delete

$fields = [];

[889] Fix | Delete

}

[890] Fix | Delete

break;

[891] Fix | Delete

default:

[892] Fix | Delete

$fields = true;

[893] Fix | Delete

}

[894] Fix | Delete

}

[895] Fix | Delete

$this->server_caps[$name] = $fields;

[896] Fix | Delete

}

[897] Fix | Delete

}

[898] Fix | Delete

}

[899] Fix | Delete

[900] Fix | Delete

/**

[901] Fix | Delete

* Send an SMTP MAIL command.

[902] Fix | Delete

* Starts a mail transaction from the email address specified in

[903] Fix | Delete

* $from. Returns true if successful or false otherwise. If True

[904] Fix | Delete

* the mail transaction is started and then one or more recipient

[905] Fix | Delete

* commands may be called followed by a data command.

[906] Fix | Delete

* Implements RFC 821: MAIL <SP> FROM:<reverse-path> <CRLF>.

[907] Fix | Delete

[908] Fix | Delete

* @param string $from Source address of this message

[909] Fix | Delete

[910] Fix | Delete

* @return bool

[911] Fix | Delete

[912] Fix | Delete

public function mail($from)

[913] Fix | Delete

{

[914] Fix | Delete

$useVerp = ($this->do_verp ? ' XVERP' : '');

[915] Fix | Delete

[916] Fix | Delete

return $this->sendCommand(

[917] Fix | Delete

'MAIL FROM',

[918] Fix | Delete

'MAIL FROM:<' . $from . '>' . $useVerp,

[919] Fix | Delete

250

[920] Fix | Delete

);

[921] Fix | Delete

}

[922] Fix | Delete

[923] Fix | Delete

/**

[924] Fix | Delete

* Send an SMTP QUIT command.

[925] Fix | Delete

* Closes the socket if there is no error or the $close_on_error argument is true.

[926] Fix | Delete

* Implements from RFC 821: QUIT <CRLF>.

[927] Fix | Delete

[928] Fix | Delete

* @param bool $close_on_error Should the connection close if an error occurs?

[929] Fix | Delete

[930] Fix | Delete

* @return bool

[931] Fix | Delete

[932] Fix | Delete

public function quit($close_on_error = true)

[933] Fix | Delete

{

[934] Fix | Delete

$noerror = $this->sendCommand('QUIT', 'QUIT', 221);

[935] Fix | Delete

$err = $this->error; //Save any error

[936] Fix | Delete

if ($noerror || $close_on_error) {

[937] Fix | Delete

$this->close();

[938] Fix | Delete

$this->error = $err; //Restore any error from the quit command

[939] Fix | Delete

}

[940] Fix | Delete

[941] Fix | Delete

return $noerror;

[942] Fix | Delete

}

[943] Fix | Delete

[944] Fix | Delete

/**

[945] Fix | Delete

* Send an SMTP RCPT command.

[946] Fix | Delete

* Sets the TO argument to $toaddr.

[947] Fix | Delete

* Returns true if the recipient was accepted false if it was rejected.

[948] Fix | Delete

* Implements from RFC 821: RCPT <SP> TO:<forward-path> <CRLF>.

[949] Fix | Delete

[950] Fix | Delete

* @param string $address The address the message is being sent to

[951] Fix | Delete

* @param string $dsn Comma separated list of DSN notifications. NEVER, SUCCESS, FAILURE

[952] Fix | Delete

* or DELAY. If you specify NEVER all other notifications are ignored.

[953] Fix | Delete

[954] Fix | Delete

* @return bool

[955] Fix | Delete

[956] Fix | Delete

public function recipient($address, $dsn = '')

[957] Fix | Delete

{

[958] Fix | Delete

if (empty($dsn)) {

[959] Fix | Delete

$rcpt = 'RCPT TO:<' . $address . '>';

[960] Fix | Delete

} else {

[961] Fix | Delete

$dsn = strtoupper($dsn);

[962] Fix | Delete

$notify = [];

[963] Fix | Delete

[964] Fix | Delete

if (strpos($dsn, 'NEVER') !== false) {

[965] Fix | Delete

$notify[] = 'NEVER';

[966] Fix | Delete

} else {

[967] Fix | Delete

foreach (['SUCCESS', 'FAILURE', 'DELAY'] as $value) {

[968] Fix | Delete

if (strpos($dsn, $value) !== false) {

[969] Fix | Delete

$notify[] = $value;

[970] Fix | Delete

}

[971] Fix | Delete

}

[972] Fix | Delete

}

[973] Fix | Delete

[974] Fix | Delete

$rcpt = 'RCPT TO:<' . $address . '> NOTIFY=' . implode(',', $notify);

[975] Fix | Delete

}

[976] Fix | Delete

[977] Fix | Delete

return $this->sendCommand(

[978] Fix | Delete

'RCPT TO',

[979] Fix | Delete

$rcpt,

[980] Fix | Delete

[250, 251]

[981] Fix | Delete

);

[982] Fix | Delete

}

[983] Fix | Delete

[984] Fix | Delete

/**

[985] Fix | Delete

* Send SMTP XCLIENT command to server and check its return code.

[986] Fix | Delete

[987] Fix | Delete

* @return bool True on success

[988] Fix | Delete

[989] Fix | Delete

public function xclient(array $vars)

[990] Fix | Delete

{

[991] Fix | Delete

$xclient_options = "";

[992] Fix | Delete

foreach ($vars as $key => $value) {

[993] Fix | Delete

if (in_array($key, SMTP::$xclient_allowed_attributes)) {

[994] Fix | Delete

$xclient_options .= " {$key}={$value}";

[995] Fix | Delete

}

[996] Fix | Delete

}

[997] Fix | Delete

if (!$xclient_options) {

[998] Fix | Delete

return true;

[999] Fix | Delete

123