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<?php
/**
* Background receive function for phiMail Direct Messaging service.
*
* This script is called by the background service manager
* at /library/ajax/execute_background_services.php
*
* Copyright (C) 2013, 2021 EMR Direct <https://www.emrdirect.com/>
*
* LICENSE: This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://opensource.org/licenses/gpl-license.php>;.
*
* @package OpenEMR
* @author EMR Direct <https://www.emrdirect.com/>
* @link http://www.open-emr.org
*/
require_once(dirname(__FILE__) . "/pnotes.inc");
require_once(dirname(__FILE__) . "/documents.php");
require_once(dirname(__FILE__) . "/gprelations.inc.php");
use OpenEMR\Common\Crypto\CryptoGen;
use OpenEMR\Common\Logging\EventAuditLogger;
use OpenEMR\Common\Logging\SystemLogger;
use OpenEMR\Events\Core\Sanitize\IsAcceptedFileFilterEvent;
use OpenEMR\Services\VersionService;
use PHPMailer\PHPMailer\PHPMailer;
/**
* Connect to a phiMail Direct Messaging server
*/
function phimail_connect(&$phimail_error)
{
if ($GLOBALS['phimail_enable'] == false) {
$phimail_error = 'C1';
return false; //for safety
}
$phimail_server = @parse_url($GLOBALS['phimail_server_address']);
$phimail_username = $GLOBALS['phimail_username'];
$cryptoGen = new CryptoGen();
$phimail_password = $cryptoGen->decryptStandard($GLOBALS['phimail_password']);
// if test mode is disabled we use the production cert, otherwise we use the test certificate.
if (isset($GLOBALS['phimail_testmode_disabled']) && $GLOBALS['phimail_testmode_disabled'] == '1') {
$phimail_cafile = $GLOBALS['fileroot'] . '/public/certs/phimail/phimail_server.pem';
} else {
$phimail_cafile = $GLOBALS['fileroot'] . '/public/certs/phimail/EMRDirectTestCA.pem';
(new SystemLogger())->debug("running phimail_connect in test mode. This should not be used for production", ['ca' => $phimail_cafile, 'testmode' => $GLOBALS['phimail_testmode_disabled']]);
}
if (!file_exists($phimail_cafile)) {
$phimail_cafile = '';
}
$phimail_secure = true;
switch ($phimail_server['scheme']) {
case "tcp":
case "http":
$server = "tcp://" . $phimail_server['host'];
$phimail_secure = false;
break;
case "https":
$server = "ssl://" . $phimail_server['host']
. ':' . $phimail_server['port'];
break;
case "ssl":
case "sslv3":
case "tls":
$server = $GLOBALS['phimail_server_address'];
break;
default:
$phimail_error = 'C2';
(new SystemLogger())->error("phimail_connect failed to connect due to invalid scheme", ['error' => $phimail_error]);
return false;
}
if ($phimail_secure) {
$context = stream_context_create();
if (
$phimail_cafile != '' &&
(!stream_context_set_option($context, 'ssl', 'verify_peer', true) ||
!stream_context_set_option($context, 'ssl', 'cafile', $phimail_cafile))
) {
$phimail_error = 'C3';
(new SystemLogger())->error("phimail_connect failed to connect", ['error' => $phimail_error, 'server' => $server, 'ca' => $phimail_cafile]);
return false;
}
$socket_tries = 0;
$fp = false;
while ($socket_tries < 3 && !$fp) {
$socket_tries++;
$fp = @stream_socket_client(
$server,
$err1,
$err2,
10,
STREAM_CLIENT_CONNECT,
$context
);
}
if (!$fp) {
if ($err1 == '111') {
$err2 = xl('Server may be offline');
}
if ($err2 == '') {
$err2 = xl('Connection error');
}
$phimail_error = "C4 $err1 ($err2)";
} else {
(new SystemLogger())->debug("phimail_connect was successful");
}
} else {
$fp = @fsockopen($server, $phimail_server['port']);
}
if ($fp !== false) {
$ret = phimail_write_expect_OK($fp, "INFO VER OEMR " . (new VersionService())->asString() . " 1.3.2 "
. \PHP_VERSION . "\n");
if ($ret !== true) {
$fp = false;
$phimail_error = 'C5';
}
}
if (!empty($phimail_error)) {
(new SystemLogger())->error("phimail_connect failed to connect", ['error' => $phimail_error, 'server' => $server, 'ca' => $phimail_cafile]);
} elseif ($fp !== false) {
(new SystemLogger())->debug("phimail_connect was successful");
} else {
(new SystemLogger())->error("phimail_connect failed to connect with unknown error", ['error' => $phimail_error, 'server' => $server, 'port' => $phimail_server['port']]);
}
return $fp;
}
/**
* Connect to a phiMail Direct Messaging server and check for any incoming status
* messages related to previously transmitted messages or any new messages received.
*/
function phimail_check()
{
$fp = phimail_connect($err);
if ($fp === false) {
phimail_logit(0, xl('could not connect to server') . ' ' . $err);
return;
}
$phimail_username = $GLOBALS['phimail_username'];
$cryptoGen = new CryptoGen();
$phimail_password = $cryptoGen->decryptStandard($GLOBALS['phimail_password']);
$ret = phimail_write_expect_OK($fp, "AUTH $phimail_username $phimail_password\n");
if ($ret !== true) {
phimail_logit(0, "authentication error " . $ret);
return;
}
if (!($notifyUsername = $GLOBALS['phimail_notify'])) {
$notifyUsername = 'admin'; //fallback
}
while (1) {
phimail_write($fp, "CHECK\n");
$ret = fgets($fp, 512);
if ($ret == "NONE\n") { //nothing to process
phimail_close($fp);
phimail_logit(1, "message check completed");
return;
} elseif (substr($ret, 0, 6) == "STATUS") {
//Format STATUS message-id status-code [additional-information]
$val = explode(" ", trim($ret), 4);
$sql = 'SELECT * from direct_message_log WHERE msg_id = ?';
$res = sqlStatementNoLog($sql, array($val[1]));
if ($res === false) { //database problem
phimail_close($fp);
phimail_logit(0, "database problem");
return;
}
if (($msg = sqlFetchArray($res)) === false) {
//no match, so log it and move on (should never happen)
phimail_logit(0, "NO MATCH: " . $ret);
$ret = phimail_write_expect_OK($fp, "OK\n");
if ($ret !== true) {
phimail_logit(0, "M1 status acknowledgment failed: " . $ret);
return;
} else {
continue;
}
}
//if we get here, $msg contains the matching outgoing message record
if ($val[2] == 'failed') {
$success = 0;
$status = 'F';
} elseif ($val[2] == 'dispatched') {
$success = 1;
$status = 'D';
} else {
//unrecognized status, log it and move on (should never happen)
$ret = "UNKNOWN STATUS: " . $ret;
$success = 0;
$status = 'U';
}
phimail_logit($success, $ret, $msg['patient_id']);
if (!isset($val[3])) {
$val[3] = "";
}
$sql = "UPDATE direct_message_log SET status=?, status_ts=NOW(), status_info=? WHERE msg_type='S' AND msg_id=?";
$res = sqlStatementNoLog($sql, array($status, $val[3], $val[1]));
if ($res === false) { //database problem
phimail_close($fp);
phimail_logit(0, "database problem updating: " . $val[1]);
return;
}
if (!$success) {
//notify local user of failure
$sql = "SELECT username FROM users WHERE id = ?";
$res2 = sqlStatementNoLog($sql, array($msg['user_id']));
$fail_user = ($res2 === false || ($user_row = sqlFetchArray($res2)) === false) ?
xl('unknown (see log)') : $user_row['username'];
$fail_notice = xl('Sent by:') . ' ' . $fail_user . '(' . $msg['user_id'] . ') ' . xl('on') . ' ' . $msg['create_ts']
. "\n" . xl('Sent to:') . ' ' . $msg['recipient'] . "\n" . xl('Server message:') . ' ' . $ret;
phimail_notify(xl('Direct Messaging Send Failure.'), $fail_notice);
$pnote_id = addPnote(
$msg['patient_id'],
xl("FAILURE NOTICE: Direct Message Send Failed.") . "\n\n$fail_notice\n",
0,
1,
"Unassigned",
$notifyUsername,
"",
"New",
"phimail-service"
);
}
//done with this status message
$ret = phimail_write_expect_OK($fp, "OK\n");
if ($ret !== true) {
phimail_logit(0, "M2 status acknowledgment failed: " . $ret);
phimail_close($fp);
return;
}
} elseif (substr($ret, 0, 4) == "MAIL") {
$val = explode(" ", trim($ret), 5); // MAIL recipient sender #attachments msg-id
$recipient = $val[1];
$sender = $val[2];
$att = (int)$val[3];
$msg_id = $val[4];
//request main message
$ret2 = phimail_write_expect_OK($fp, "SHOW 0\n");
if ($ret2 !== true) {
phimail_logit(0, "M3 SHOW 0 failed: " . $ret2);
phimail_close($fp);
return;
}
//get message headers
$hdrs = "";
while (($next_hdr = fgets($fp, 1024)) != "\n") {
$hdrs .= $next_hdr;
}
$mime_type = fgets($fp, 512);
$mime_info = explode(";", $mime_type);
$mime_type_main = trim(strtolower($mime_info[0]));
//get main message body
$body_len = fgets($fp, 256);
$body = phimail_read_blob($fp, $body_len);
if ($body === false) {
phimail_logit(0, "M4 read body failed");
phimail_close($fp);
return;
}
$att2 = fgets($fp, 256);
if ($att2 != $att) { //safety for mismatch on attachments
phimail_logit(0, "M5 attachment mismatch");
phimail_close($fp);
return;
}
//get attachment info
if ($att > 0) {
for ($attnum = 0; $attnum < $att; $attnum++) {
if (
($attinfo[$attnum]['name'] = fgets($fp, 1024)) === false
|| ($attinfo[$attnum]['mime'] = fgets($fp, 1024)) === false
|| ($attinfo[$attnum]['desc'] = fgets($fp, 1024)) === false
) {
phimail_logit(0, "M6 read attachment " . ($attnum + 1) . " metadata failed");
phimail_close($fp);
return;
}
}
}
//main part gets stored as document if not plain text content
//(if plain text it will be the body of the final pnote)
$all_doc_ids = array();
$doc_id = 0;
$att_detail = "";
if ($mime_type_main != "text/plain" && $mime_type_main != "text/html") {
if ($body_len == 0) {
$att_detail = $att_detail . "\n" . xl("Zero length attachment") . " ($mime_type_main; " .
"0 bytes - " . xl("empty file received") . ") Main message body";
unlink($body);
} else {
$name = uniqid("dm-message-") . phimail_extension($mime_type_main);
$doc_id = phimail_store($name, $mime_type_main, $body);
if (!$doc_id) {
phimail_logit(0, "M7 store non-text body failed");
phimail_close($fp);
return;
}
$idnum = $doc_id['doc_id'];
$all_doc_ids[] = $idnum;
$url = $doc_id['url'];
$url = substr($url, strrpos($url, "/") + 1);
$att_detail = "\n" . xl("Document") . " $idnum (\"$url\"; $mime_type_main; " .
filesize($body) . " bytes) Main message body";
}
}
//download and store attachments
for ($attnum = 0; $attnum < $att; $attnum++) {
$ret2 = phimail_write_expect_OK($fp, "SHOW " . ($attnum + 1) . "\n");
if ($ret2 !== true) {
phimail_logit(0, "M8 SHOW " . ($attnum + 1) . " failed: " . $ret2);
phimail_close($fp);
return;
}
//we can ignore next two lines (repeat of name and mime-type)
if (($a1 = fgets($fp, 512)) === false || ($a2 = fgets($fp, 512)) === false) {
phimail_logit(0, "M9 skip attachment " . ($attnum + 1) . " duplicate header lines failed");
phimail_close($fp);
return;
}
$att_len = fgets($fp, 256); //length of file
$attdata = phimail_read_blob($fp, $att_len);
if ($attdata === false) {
phimail_logit(0, "M10 read attachment " . ($attnum + 1) . " failed");
phimail_close($fp);
return;
}
$attinfo[$attnum]['file'] = $attdata;
$req_name = trim($attinfo[$attnum]['name']);
$req_name = (empty($req_name) ? $attdata : "dm-") . $req_name;
$attinfo[$attnum]['mime'] = explode(";", trim($attinfo[$attnum]['mime']));
$attmime = strtolower($attinfo[$attnum]['mime'][0]);
if ($att_len == 0) {
$att_detail = $att_detail . "\n" . xl("Zero length attachment") . " ($attmime; " .
"0 bytes - " . xl("empty file received") . " " . trim($attinfo[$attnum]['desc']);
unlink($attdata);
} else {
$att_doc_id = phimail_store($req_name, $attmime, $attdata);
if (!$att_doc_id) {
phimail_logit(0, "M11 store attachment " . ($attnum + 1) . " failed");
phimail_close($fp);
return;
}
$attinfo[$attnum]['doc_id'] = $att_doc_id;
$idnum = $att_doc_id['doc_id'];
$all_doc_ids[] = $idnum;
$url = $att_doc_id['url'];
$url = substr($url, strrpos($url, "/") + 1);
$att_detail = $att_detail . "\n" . xl("Document") . " $idnum (\"$url\"; $attmime; " .
$att_doc_id['filesize'] . " bytes) " . trim($attinfo[$attnum]['desc']);
}
}
if ($att_detail != "") {
$att_detail = "\n\n" . xl("The following documents were attached to this Direct message:") . $att_detail;
}
$ret2 = phimail_write_expect_OK($fp, "DONE\n"); //we'll check for failure after logging.
//logging only after succesful download, storage, and acknowledgement of message
$sql = "INSERT INTO direct_message_log (msg_type,msg_id,sender,recipient,status,status_ts,user_id) " .
"VALUES ('R', ?, ?, ?, 'R', NOW(), ?)";
$res = sqlStatementNoLog($sql, array($msg_id, $sender, $recipient, phimail_service_userID()));
phimail_logit(1, $ret);
//alert appointed user about new message
switch ($mime_type_main) {
case "text/plain":
$body_text = @file_get_contents($body); //this was not uploaded as a document
unlink($body);
if (empty($body_text ?? '')) {
$body_text = xl("Please note, this message was received empty and is not an error.");
}
$pnote_id = addPnote(
0,
xl("Direct Message Received.") . "\n$hdrs\n$body_text$att_detail",
0,
1,
"Unassigned",
$notifyUsername,
"",
"New",
"phimail-service"
);
break;
case "text/html":
$body_text = @file_get_contents($body);
unlink($body);
if (empty($body_text ?? '')) {
$body_text = xl("Please note, this message was received empty and is not an error.");
} else {
// meager attempt to covert to text. @TODO convert our Messages message body from textarea to div so can display html.
$body_text = trim(html_entity_decode(strip_tags(str_ireplace(["<br />", "<br>", "<br/>"], PHP_EOL, $body_text))));
}
$pnote_id = addPnote(
0,
xl("Direct Message Received.") . "\n$hdrs\n$body_text$att_detail",
0,
1,
"Unassigned",
$notifyUsername,
"",
"New",
"phimail-service"
);
break;
default:
$note = xl("Direct Message Received.") . "\n$hdrs\n"
. xl("Message content is not plain text so it has been stored as a document.") . $att_detail;
$pnote_id = addPnote(0, $note, 0, 1, "Unassigned", $notifyUsername, "", "New", "phimail-service");
break;
}
foreach ($all_doc_ids as $doc_id) {
setGpRelation(1, $doc_id, 6, $pnote_id);
}
if ($ret2 !== true) {
phimail_logit(0, "M12 DONE failed: " . $ret2);
phimail_close();
return;
}
} else { //unrecognized or FAIL response
phimail_logit(0, "M16 unexpected problem checking messages " . $ret);
phimail_close($fp);
return;
}
}
}
/**
* Helper functions
*/
function phimail_write($fp, $text)
{
fwrite($fp, $text);
fflush($fp);
}
function phimail_write_expect_OK($fp, $text)
{
phimail_write($fp, $text);
$ret = fgets($fp, 256);
if ($ret != "OK\n") { //unexpected error
phimail_close($fp);
return $ret;
}
return true;
}
function phimail_close($fp)
{
fclose($fp);
}
function phimail_logit($success, $text, $pid = 0, $event = "direct-message-check")
{
if (!$success) {
(new SystemLogger())->errorLogCaller($event, ['success' => $success, 'text' => $text, 'pid' => $pid]);
}
EventAuditLogger::instance()->newEvent($event, "phimail-service", 0, $success, $text, $pid);
}
/**
* Read a blob of data into a local temporary file
*
* @param $len number of bytes to read
* @return the temp filename, or FALSE if failure
*/
function phimail_read_blob($fp, $len)
{
$fpath = $GLOBALS['temporary_files_dir'];
if (!@file_exists($fpath)) {
phimail_logit(0, "M13 temp dir does not exist: " . $fpath);
return false;
}
$name = uniqid("direct-");
$fn = $fpath . "/" . $name . ".dat";
$dup = 1;
while (file_exists($fn)) {
$fn = $fpath . "/" . $name . "." . $dup++ . ".dat";
}
$ff = @fopen($fn, "w");
if (!$ff) {
phimail_logit(0, "M14 failed opening temp file: " . $fn);
return false;
}
$bytes_left = $len;
$chunk_size = 1024;
while (!feof($fp) && $bytes_left > 0) {
if ($bytes_left < $chunk_size) {
$chunk_size = $bytes_left;
}
$chunk = fread($fp, $chunk_size);
if ($chunk === false || @fwrite($ff, $chunk) === false) {
@fclose($ff);
@unlink($fn);
phimail_logit(0, "M15 failure " . ($chunk === false ? "reading" : "writing")
. " blob chunk after " . ($len - $bytes_left) . " bytes");
return false;
}
$bytes_left -= strlen($chunk);
}
@fclose($ff);
return ($fn);
}
/**
* Return a suitable filename extension based on MIME-type
* (very limited, default is .dat)
*/
function phimail_extension($mime)
{
$m = explode("/", $mime);
switch ($mime) {
case 'text/plain':
return (".txt");
default:
}
switch ($m[1]) {
case 'html':
case 'xml':
case 'pdf':
return ("." . $m[1]);
default:
return (".dat");
}
}
function phimail_service_userID($name = 'phimail-service')
{
$sql = "SELECT id FROM users WHERE username=?";
if (
($r = sqlStatementNoLog($sql, array($name))) === false ||
($u = sqlFetchArray($r)) === false
) {
$user = 1; //default if we don't have a service user
} else {
$user = $u['id'];
}
return ($user);
}
/**
* Given an IsAcceptedFileFilterEvent from our isWhitelist function we check to make sure that we allow
* the mime type of the Direct message attachment that was sent by the server.
*
* @param IsAcceptedFileFilterEvent $event The event with the mimetype to check if we allow it or not
* @return IsAcceptedFileFilterEvent
*/
function phimail_allow_document_mimetype(IsAcceptedFileFilterEvent $event)
{
global $phimail_direct_message_check_allowed_mimetype;
$isAllowedFile = $event->isAllowedFile();
if (!$isAllowedFile) {
// we used to only bypass if the Direct mime type matched with what comes through in the event.
// This fails though if there are multiple possible mime types such as application/xml vs text/xml and the Direct
// mime type differs from the local OS detection. We will just bypass the mime check alltogether.
$event->setAllowedFile(true);
}
return $event;
}
/**
* Registers an attachment or non-text message file using the existing Document structure
*
* @return Array(doc_id,URL) of the file as stored in documents table, false = failure
*/
function phimail_store($name, $mime_type, $fn)
{
global $phimail_direct_message_check_allowed_mimetype;
$allowMimeTypeFunction = 'phimail_allow_document_mimetype';
// we bypass the whitelisting JUST for phimail documents
if (isset($GLOBALS['kernel'])) {
$GLOBALS['kernel']->getEventDispatcher()
->addListener(IsAcceptedFileFilterEvent::EVENT_FILTER_IS_ACCEPTED_FILE, $allowMimeTypeFunction);
}
// Collect phimail user id
$user = phimail_service_userID();
try {
// Import the document
$phimail_direct_message_check_allowed_mimetype = $mime_type;
$filesize = filesize($fn);
$return = addNewDocument($name, $mime_type, $fn, 0, $filesize, $user, 'direct');
if (is_array($return)) {
$return['filesize'] = $filesize;
}
} catch (\Exception $exception) {
(new SystemLogger())->errorLogCaller($exception->getMessage(), ['name' => $name, 'mime_type' => $mime_type, 'fn' => $fn]);
phimail_logit(0, "problem storing attachment in OpenEMR");
$return = false;
} finally {
$phimail_direct_message_check_allowed_mimetype = null;
// There shouldn't be another request in the system to add a document, but for security sake we will prevent code
// after this from bypassing the whitelist filter
if (isset($GLOBALS['kernel'])) {
$GLOBALS['kernel']->getEventDispatcher()
->removeListener(IsAcceptedFileFilterEvent::EVENT_FILTER_IS_ACCEPTED_FILE, $allowMimeTypeFunction);
}
// Remove the temporary file
@unlink($fn);
}
// Return the result
return $return;
}
/**
* Send an error notification or other alert to the notification address specified in globals.
* (notification email function modified from interface/drugs/dispense_drug.php)
*
* @return true if notification successfully sent, false otherwise
*/
function phimail_notify($subj, $body)
{
$recipient = $GLOBALS['practice_return_email_path'];
if (empty($recipient)) {
return false;
}
$mail = new PHPMailer();
$mail->From = $recipient;
$mail->FromName = 'phiMail Gateway';
$mail->isMail();
$mail->Host = "localhost";
$mail->Mailer = "mail";
$mail->Body = $body;
$mail->Subject = $subj;
$mail->AddAddress($recipient);
return ($mail->Send());
}