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- <?php
- /**
- * mime.php
- *
- * Copyright (c) 1999-2002 The SquirrelMail Project Team
- * Licensed under the GNU GPL. For full terms see the file COPYING.
- *
- * This contains the functions necessary to detect and decode MIME
- * messages.
- *
- * $Id$
- */
- require_once('../functions/imap.php');
- require_once('../functions/attachment_common.php');
- /** Setting up the objects that have the structure for the message **/
- class msg_header {
- /** msg_header contains generic variables for values that **/
- /** could be in a header. **/
- var $type0 = '', $type1 = '', $boundary = '', $charset = '',
- $encoding = '', $size = 0, $to = array(), $from = '', $date = '',
- $cc = array(), $bcc = array(), $reply_to = '', $subject = '',
- $id = 0, $mailbox = '', $description = '', $filename = '',
- $entity_id = 0, $message_id = 0, $name = '', $priority = 3, $type = '';
- }
- class message {
- /** message is the object that contains messages. It is a recursive
- object in that through the $entities variable, it can contain
- more objects of type message. See documentation in mime.txt for
- a better description of how this works.
- **/
- var $header = '', $entities = array();
- function addEntity ($msg) {
- $this->entities[] = $msg;
- }
- }
- /* --------------------------------------------------------------------------------- */
- /* MIME DECODING */
- /* --------------------------------------------------------------------------------- */
- /* This function gets the structure of a message and stores it in the "message" class.
- * It will return this object for use with all relevant header information and
- * fully parsed into the standard "message" object format.
- */
- function mime_structure ($imap_stream, $header) {
- $ssid = sqimap_session_id();
- $lsid = strlen( $ssid );
- $id = $header->id;
- fputs ($imap_stream, "$ssid FETCH $id BODYSTRUCTURE\r\n");
- //
- // This should use sqimap_read_data instead of reading it itself
- //
- $read = fgets ($imap_stream, 9216);
- $bodystructure = '';
- while ( substr($read, 0, $lsid) <> $ssid &&
- !feof( $imap_stream ) ) {
- $bodystructure .= $read;
- $read = fgets ($imap_stream, 9216);
- }
- $read = $bodystructure;
- // isolate the body structure and remove beginning and end parenthesis
- $read = trim(substr ($read, strpos(strtolower($read), 'bodystructure') + 13));
- $read = trim(substr ($read, 0, -1));
- $end = mime_match_parenthesis(0, $read);
- while ($end == strlen($read)-1) {
- $read = trim(substr ($read, 0, -1));
- $read = trim(substr ($read, 1));
- $end = mime_match_parenthesis(0, $read);
- }
- $msg = mime_parse_structure ($read, 0);
- $msg->header = $header;
- return( $msg );
- }
- /* this starts the parsing of a particular structure. It is called recursively,
- * so it can be passed different structures. It returns an object of type
- * $message.
- * First, it checks to see if it is a multipart message. If it is, then it
- * handles that as it sees is necessary. If it is just a regular entity,
- * then it parses it and adds the necessary header information (by calling out
- * to mime_get_elements()
- */
- function mime_parse_structure ($structure, $ent_id) {
- global $mailbox;
- $properties = array();
- $msg = new message();
- if ($structure{0} == '(') {
- $old_ent_id = $ent_id;
- $ent_id = mime_new_element_level($ent_id);
- $start = $end = -1;
- do {
- $start = $end+1;
- $end = mime_match_parenthesis ($start, $structure);
- /* check if we are dealing with a new entity-level */
- $i = strrpos($ent_id,'.');
- if ($i>0) {
- $ent = substr($ent_id, $i+1);
- } else {
- $ent = '';
- }
- /* add "forgotten" parent entities (alternative and relative) */
- if ($ent == '0') {
- /* new entity levels have information about the type (type1) and
- * the properties. This information is situated at the end of the
- * structure string like for example (example between the brackets)
- * [ "RELATED" ("BOUNDARY" "myboundary" "TYPE" "plain/html") ]
- */
-
- /* get the involved properties for parsing to mime_get_properties */
- $startprop = strrpos($structure,'(');
- $properties_str = substr($structure,$startprop);
- $endprop = mime_match_parenthesis ($startprop, $structure);
- $propstr = substr($structure, $startprop + 1, ($endprop - $startprop)-1);
- /* cut off the used properties */
- if ($startprop) {
- $structure_end = substr($structure, $endprop+2);
- $structure = trim(substr($structure,0,$startprop));
- }
- /* get type1 */
- $pos = strrpos($structure,' ');
- if ($structure{$pos+1} =='(') $pos++;
-
- $type1 = strtolower(substr($structure, $pos+2, (count($structure)-2)));
- /* cut off type1 */
- if ($pos && $startprop) {
- $structure = trim(substr($structure, 0, $pos));
- }
- /* process the found information */
- $properties = mime_get_props($properties, $properties_str);
- if (count($properties)>0) {
- $msg->header->entity_id = $old_ent_id;
- $msg->header->type0 = 'multipart';
- $msg->header->type1 = $type1;
- for ($i=0; $i < count($properties); $i++) {
- $msg->header->{$properties[$i]['name']} = $properties[$i]['value'];
- }
- }
- $structure = $structure . ' ' . $structure_end;
- }
- $element = substr($structure, $start+1, ($end - $start)-1);
- $ent_id = mime_increment_id ($ent_id);
- $newmsg = mime_parse_structure ($element, $ent_id);
- /* set mailbox in case of message/rfc822 entities */
- if (isset($newmsg->header->type0) && isset($newmsg->header->type1)) {
- if ($newmsg->header->type0 == 'message' && $newmsg->header->type1 == 'rfc822') {
- $newmsg->header->mailbox=$mailbox;
- }
- }
- $msg->addEntity ($newmsg);
- } while ($structure{$end+1} == '(');
- } else {
- // parse the elements
- $msg = mime_get_element ($structure, $msg, $ent_id);
- }
- return $msg;
- }
- /* Increments the element ID. An element id can look like any of
- * the following: 1, 1.2, 4.3.2.4.1, etc. This function increments
- * the last number of the element id, changing 1.2 to 1.3.
- */
- function mime_increment_id ($id) {
- if (strpos($id, '.')) {
- $first = substr($id, 0, strrpos($id, '.'));
- $last = substr($id, strrpos($id, '.')+1);
- $last++;
- $new = $first . '.' .$last;
- } else {
- $new = $id + 1;
- }
- return $new;
- }
- /*
- * See comment for mime_increment_id().
- * This adds another level on to the entity_id changing 1.3 to 1.3.0
- * NOTE: 1.3.0 is not a valid element ID. It MUST be incremented
- * before it can be used. I left it this way so as not to have
- * to make a special case if it is the first entity_id. It
- * always increments it, and that works fine.
- */
- function mime_new_element_level ($id) {
- if (!$id) {
- $id = 0;
- } else {
- $id = $id . '.0';
- }
- return( $id );
- }
- function mime_get_element (&$structure, $msg, $ent_id) {
- $elem_num = 1;
- $msg->header = new msg_header();
- $msg->header->entity_id = $ent_id;
- $properties = array();
- while (strlen($structure) > 0) {
- $structure = trim($structure);
- $char = $structure{0};
- if (strtolower(substr($structure, 0, 3)) == 'nil') {
- $text = '';
- $structure = substr($structure, 3);
- } else if ($char == '"') {
- // loop through until we find the matching quote, and return that as a string
- $pos = 1;
- $text = '';
- while ( ($char = $structure{$pos} ) <> '"' && $pos < strlen($structure)) {
- $text .= $char;
- $pos++;
- }
- $structure = substr($structure, strlen($text) + 2);
- } else if ($char == '{') {
- /**
- * loop through until we find the matching quote,
- * and return that as a string
- */
- $pos = 1;
- $len = '';
- while (($char = $structure{$pos}) != '}'
- && $pos < strlen($structure)) {
- $len .= $char;
- $pos++;
- }
- $structure = substr($structure, strlen($len) + 4);
- $text = substr($structure, 0, $len);
- $structure = substr($structure, $len + 1);
- } else if ($char == '(') {
- // comment me
- $end = mime_match_parenthesis (0, $structure);
- $sub = substr($structure, 1, $end-1);
- $properties = mime_get_props($properties, $sub);
- $structure = substr($structure, strlen($sub) + 2);
- } else {
- // loop through until we find a space or an end parenthesis
- $pos = 0;
- $char = $structure{$pos};
- $text = '';
- while ($char != ' ' && $char != ')' && $pos < strlen($structure)) {
- $text .= $char;
- $pos++;
- $char = $structure{$pos};
- }
- $structure = substr($structure, strlen($text));
- }
- // This is where all the text parts get put into the header
- switch ($elem_num) {
- case 1:
- $msg->header->type0 = strtolower($text);
- break;
- case 2:
- $msg->header->type1 = strtolower($text);
- break;
- case 4: // Id
- // Invisimail enclose images with <>
- $msg->header->id = str_replace( '<', '', str_replace( '>', '', $text ) );
- break;
- case 5:
- $msg->header->description = $text;
- break;
- case 6:
- $msg->header->encoding = strtolower($text);
- break;
- case 7:
- $msg->header->size = $text;
- break;
- default:
- if ($msg->header->type0 == 'text' && $elem_num == 8) {
- // This is a plain text message, so lets get the number of lines
- // that it contains.
- $msg->header->num_lines = $text;
- } else if ($msg->header->type0 == 'message' && $msg->header->type1 == 'rfc822' && $elem_num == 8) {
- // This is an encapsulated message, so lets start all over again and
- // parse this message adding it on to the existing one.
- $structure = trim($structure);
- if ( $structure{0} == '(' ) {
- $e = mime_match_parenthesis (0, $structure);
- $structure = substr($structure, 0, $e);
- $structure = substr($structure, 1);
- $m = mime_parse_structure($structure, $msg->header->entity_id);
- // the following conditional is there to correct a bug that wasn't
- // incrementing the entity IDs correctly because of the special case
- // that message/rfc822 is. This fixes it fine.
- if (substr($structure, 1, 1) != '(')
- $m->header->entity_id = mime_increment_id(mime_new_element_level($ent_id));
- // Now we'll go through and reformat the results.
- if ($m->entities) {
- for ($i=0; $i < count($m->entities); $i++) {
- $msg->addEntity($m->entities[$i]);
- }
- } else {
- $msg->addEntity($m);
- }
- $structure = "";
- }
- }
- break;
- }
- $elem_num++;
- $text = "";
- }
- // loop through the additional properties and put those in the various headers
- for ($i=0; $i < count($properties); $i++) {
- $msg->header->{$properties[$i]['name']} = $properties[$i]['value'];
- }
- return $msg;
- }
- /*
- * I did most of the MIME stuff yesterday (June 20, 2000), but I couldn't
- * figure out how to do this part, so I decided to go to bed. I woke up
- * in the morning and had a flash of insight. I went to the white-board
- * and scribbled it out, then spent a bit programming it, and this is the
- * result. Nothing complicated, but I think my brain was fried yesterday.
- * Funny how that happens some times.
- *
- * This gets properties in a nested parenthesisized list. For example,
- * this would get passed something like: ("attachment" ("filename" "luke.tar.gz"))
- * This returns an array called $props with all paired up properties.
- * It ignores the "attachment" for now, maybe that should change later
- * down the road. In this case, what is returned is:
- * $props[0]["name"] = "filename";
- * $props[0]["value"] = "luke.tar.gz";
- */
- function mime_get_props ($props, $structure) {
- while (strlen($structure) > 0) {
- $structure = trim($structure);
- $char = $structure{0};
- if ($char == '"') {
- $pos = 1;
- $tmp = '';
- while ( ( $char = $structure{$pos} ) != '"' &&
- $pos < strlen($structure)) {
- $tmp .= $char;
- $pos++;
- }
- $structure = trim(substr($structure, strlen($tmp) + 2));
- $char = $structure{0};
- if ($char == '"') {
- $pos = 1;
- $value = '';
- while ( ( $char = $structure{$pos} ) != '"' &&
- $pos < strlen($structure) ) {
- $value .= $char;
- $pos++;
- }
- $structure = trim(substr($structure, strlen($value) + 2));
- $k = count($props);
- $props[$k]['name'] = strtolower($tmp);
- $props[$k]['value'] = $value;
- if ($structure != '') {
- mime_get_props($props, $structure);
- } else {
- return $props;
- }
- } else if ($char == '(') {
- $end = mime_match_parenthesis (0, $structure);
- $sub = substr($structure, 1, $end-1);
- if (! isset($props))
- $props = array();
- $props = mime_get_props($props, $sub);
- $structure = substr($structure, strlen($sub) + 2);
- return $props;
- }
- } else if ($char == '(') {
- $end = mime_match_parenthesis (0, $structure);
- $sub = substr($structure, 1, $end-1);
- $props = mime_get_props($props, $sub);
- $structure = substr($structure, strlen($sub) + 2);
- return $props;
- } else {
- return $props;
- }
- }
- }
- /*
- * Matches parenthesis. It will return the position of the matching
- * parenthesis in $structure. For instance, if $structure was:
- * ("text" "plain" ("val1name", "1") nil ... )
- * x x
- * then this would return 42 to match up those two.
- */
- function mime_match_parenthesis ($pos, $structure) {
- $j = strlen( $structure );
-
- /*
- * ignore all extra characters
- * If inside of a quoted string or literal, skip it -- Boundary IDs and other
- * things can have ) in them.
- */
-
- if ( $structure{$pos} != '(' ) {
- return( $j );
- }
-
- while ( $pos < $j ) {
- $pos++;
- if ($structure{$pos} == ')') {
- return $pos;
- } elseif ($structure{$pos} == '"') { /* check for quoted string */
- $pos++;
- while ( $structure{$pos} != '"' &&
- $pos < $j ) {
- if (substr($structure, $pos, 2) == '\\"') {
- $pos++;
- } elseif (substr($structure, $pos, 2) == '\\\\') {
- $pos++;
- }
- $pos++;
- }
- } elseif ($structure{$pos} == '{') { /* check for literal */
- $str = substr($structure, $pos);
- $pos++;
- if (preg_match("/^\{(\d+)\}.*/",$str,$reg)) {
- $pos = $pos + strlen($reg[1]) + $reg[1] + 2;
- }
- } elseif ( $structure{$pos} == '(' ) {
- $pos = mime_match_parenthesis ($pos, $structure);
- }
- }
- echo _("Error decoding mime structure. Report this as a bug!") . '<br>';
- return( $pos );
- }
- function mime_fetch_body($imap_stream, $id, $ent_id) {
- /*
- * do a bit of error correction. If we couldn't find the entity id, just guess
- * that it is the first one. That is usually the case anyway.
- */
- if (!$ent_id) {
- $ent_id = 1;
- }
- $cmd = "FETCH $id BODY[$ent_id]";
- $data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message);
- do {
- $topline = trim(array_shift( $data ));
- } while( $topline && $topline[0] == '*' && !preg_match( '/\* [0-9]+ FETCH.*/i', $topline )) ;
- $wholemessage = implode('', $data);
- if (ereg('\\{([^\\}]*)\\}', $topline, $regs)) {
- $ret = substr( $wholemessage, 0, $regs[1] );
- /*
- There is some information in the content info header that could be important
- in order to parse html messages. Let's get them here.
- */
- if ( $ret{0} == '<' ) {
- $data = sqimap_run_command ($imap_stream, "FETCH $id BODY[$ent_id.MIME]", true, $response, $message);
- /* BASE within HTML documents is illegal (see w3 spec)
- * $base = '';
- * $k = 10;
- * foreach( $data as $d ) {
- * if ( substr( $d, 0, 13 ) == 'Content-Base:' ) {
- * $j = strlen( $d );
- * $i = 13;
- * $base = '';
- * while ( $i < $j &&
- * ( !isNoSep( $d{$i} ) || $d{$i} == '"' ) )
- * $i++;
- * while ( $i < $j ) {
- * if ( isNoSep( $d{$i} ) )
- * $base .= $d{$i};
- * $i++;
- * }
- * $k = 0;
- * } elseif ( $k == 1 && !isnosep( $d{0} ) ) {
- * $base .= substr( $d, 1 );
- * }
- * $k++;
- * }
- * if ( $base <> '' ) {
- * $ret = "<base href=\"$base\">" . $ret;
- * }
- * */
- }
- } else if (ereg('"([^"]*)"', $topline, $regs)) {
- $ret = $regs[1];
- } else {
- global $where, $what, $mailbox, $passed_id, $startMessage;
- $par = 'mailbox=' . urlencode($mailbox) . "&passed_id=$passed_id";
- if (isset($where) && isset($what)) {
- $par .= '&where='. urlencode($where) . "&what=" . urlencode($what);
- } else {
- $par .= "&startMessage=$startMessage&show_more=0";
- }
- $par .= '&response=' . urlencode($response) .
- '&message=' . urlencode($message).
- '&topline=' . urlencode($topline);
- echo '<tt><br>' .
- '<table width="80%"><tr>' .
- '<tr><td colspan=2>' .
- _("Body retrieval error. The reason for this is most probably that the message is malformed. Please help us making future versions better by submitting this message to the developers knowledgebase!") .
- " <A HREF=\"../src/retrievalerror.php?$par\"><br>" .
- _("Submit message") . '</A><BR> ' .
- '</td></tr>' .
- '<td><b>' . _("Command:") . "</td><td>$cmd</td></tr>" .
- '<td><b>' . _("Response:") . "</td><td>$response</td></tr>" .
- '<td><b>' . _("Message:") . "</td><td>$message</td></tr>" .
- '<td><b>' . _("FETCH line:") . "</td><td>$topline</td></tr>" .
- "</table><BR></tt></font><hr>";
- $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message);
- array_shift($data);
- $wholemessage = implode('', $data);
- $ret = $wholemessage;
- }
- return( $ret );
- }
- function mime_print_body_lines ($imap_stream, $id, $ent_id, $encoding) {
- // do a bit of error correction. If we couldn't find the entity id, just guess
- // that it is the first one. That is usually the case anyway.
- if (!$ent_id) {
- $ent_id = 1;
- }
- $sid = sqimap_session_id();
- // Don't kill the connection if the browser is over a dialup
- // and it would take over 30 seconds to download it.
- // don´t call set_time_limit in safe mode.
- if (!ini_get("safe_mode")) {
- set_time_limit(0);
- }
- fputs ($imap_stream, "$sid FETCH $id BODY[$ent_id]\r\n");
- $cnt = 0;
- $continue = true;
- $read = fgets ($imap_stream,4096);
- // This could be bad -- if the section has sqimap_session_id() . ' OK'
- // or similar, it will kill the download.
- while (!ereg("^".$sid." (OK|BAD|NO)(.*)$", $read, $regs)) {
- if (trim($read) == ')==') {
- $read1 = $read;
- $read = fgets ($imap_stream,4096);
- if (ereg("^".$sid." (OK|BAD|NO)(.*)$", $read, $regs)) {
- return;
- } else {
- echo decodeBody($read1, $encoding) .
- decodeBody($read, $encoding);
- }
- } else if ($cnt) {
- echo decodeBody($read, $encoding);
- }
- $read = fgets ($imap_stream,4096);
- $cnt++;
- }
- }
- /* -[ END MIME DECODING ]----------------------------------------------------------- */
- /* This is the first function called. It decides if this is a multipart
- message or if it should be handled as a single entity
- */
- function decodeMime ($imap_stream, &$header) {
- global $username, $key, $imapServerAddress, $imapPort;
- return mime_structure ($imap_stream, $header);
- }
- // This is here for debugging purposese. It will print out a list
- // of all the entity IDs that are in the $message object.
- function listEntities ($message) {
- if ($message) {
- if ($message->header->entity_id)
- echo "<tt>" . $message->header->entity_id . ' : ' . $message->header->type0 . '/' . $message->header->type1 . '<br>';
- for ($i = 0; $message->entities[$i]; $i++) {
- $msg = listEntities($message->entities[$i], $ent_id);
- if ($msg)
- return $msg;
- }
- }
- }
- /* returns a $message object for a particular entity id */
- function getEntity ($message, $ent_id) {
- if ($message) {
- if ($message->header->entity_id == $ent_id && strlen($ent_id) == strlen($message->header->entity_id))
- {
- return $message;
- } else {
- for ($i = 0; isset($message->entities[$i]); $i++) {
- $msg = getEntity ($message->entities[$i], $ent_id);
- if ($msg) {
- return $msg;
- }
- }
- }
- }
- }
- /*
- * figures out what entity to display and returns the $message object
- * for that entity.
- */
- function findDisplayEntity ($msg, $textOnly = true, $entity = array() ) {
- global $show_html_default;
-
- $found = false;
- if ($msg) {
- $type = $msg->header->type0.'/'.$msg->header->type1;
- if ( $type == 'multipart/alternative') {
- $msg = findAlternativeEntity($msg, $textOnly);
- if (count($msg->entities) == 0) {
- $entity[] = $msg->header->entity_id;
- } else {
- $found = true;
- $entity =findDisplayEntity($msg,$textOnly, $entity);
- }
- } else if ( $type == 'multipart/related') {
- $msgs = findRelatedEntity($msg);
- for ($i = 0; $i < count($msgs); $i++) {
- $msg = $msgs[$i];
- if (count($msg->entities) == 0) {
- $entity[] = $msg->header->entity_id;
- } else {
- $found = true;
- $entity =findDisplayEntity($msg,$textOnly, $entity);
- }
- }
- } else if ( count($entity) == 0 &&
- $msg->header->type0 == 'text' &&
- ( $msg->header->type1 == 'plain' ||
- $msg->header->type1 == 'html' ) &&
- isset($msg->header->entity_id) ) {
- if (count($msg->entities) == 0) {
- $entity[] = $msg->header->entity_id;
- }
- }
- $i = 0;
- while ( isset($msg->entities[$i]) && count($entity) == 0 && !$found ) {
- $entity = findDisplayEntity($msg->entities[$i], $textOnly, $entity);
- $i++;
- }
- }
- if ( !isset($entity[0]) ) {
- $entity[]="";
- }
- return( $entity );
- }
- /* Shows the HTML version */
- function findDisplayEntityHTML ($message) {
- if ( $message->header->type0 == 'text' &&
- $message->header->type1 == 'html' &&
- isset($message->header->entity_id)) {
- return $message->header->entity_id;
- }
- for ($i = 0; isset($message->entities[$i]); $i ++) {
- if ( $message->header->type0 == 'message' &&
- $message->header->type1 == 'rfc822' &&
- isset($message->header->entity_id)) {
- return 0;
- }
-
- $entity = findDisplayEntityHTML($message->entities[$i]);
- if ($entity != 0) {
- return $entity;
- }
- }
- return 0;
- }
- function findAlternativeEntity ($message, $textOnly) {
- global $show_html_default;
- /* if we are dealing with alternative parts then we choose the best
- * viewable message supported by SM.
- */
- if ($show_html_default && !$textOnly) {
- $alt_order = array ('text/plain','text/html');
- } else {
- $alt_order = array ('text/plain');
- }
- $best_view = 0;
- $ent_id = 0;
- $k = 0;
- for ($i = 0; $i < count($message->entities); $i ++) {
- $type = $message->entities[$i]->header->type0.'/'.$message->entities[$i]->header->type1;
- if ($type == 'multipart/related') {
- $type = $message->entities[$i]->header->type;
- }
- for ($j = $k; $j < count($alt_order); $j++) {
- if ($alt_order[$j] == $type && $j > $best_view) {
- $best_view = $j;
- $ent_id = $i;
- $k = $j;
- }
- }
- }
- return $message->entities[$ent_id];
- }
- function findRelatedEntity ($message) {
- $msgs = array();
- for ($i = 0; $i < count($message->entities); $i ++) {
- $type = $message->entities[$i]->header->type0.'/'.$message->entities[$i]->header->type1;
- if ($message->header->type == $type) {
- $msgs[] = $message->entities[$i];
- }
- }
- return $msgs;
- }
- /*
- * translateText
- * Extracted from strings.php 23/03/2002
- */
- function translateText(&$body, $wrap_at, $charset) {
- global $where, $what; /* from searching */
- global $color; /* color theme */
- require_once('../functions/url_parser.php');
- $body_ary = explode("\n", $body);
- $PriorQuotes = 0;
- for ($i=0; $i < count($body_ary); $i++) {
- $line = $body_ary[$i];
- if (strlen($line) - 2 >= $wrap_at) {
- sqWordWrap($line, $wrap_at);
- }
- $line = charset_decode($charset, $line);
- $line = str_replace("\t", ' ', $line);
- parseUrl ($line);
- $Quotes = 0;
- $pos = 0;
- $j = strlen( $line );
- while ( $pos < $j ) {
- if ($line[$pos] == ' ') {
- $pos ++;
- } else if (strpos($line, '>', $pos) === $pos) {
- $pos += 4;
- $Quotes ++;
- } else {
- break;
- }
- }
-
- if ($Quotes > 1) {
- if (! isset($color[14])) {
- $color[14] = '#FF0000';
- }
- $line = '<FONT COLOR="' . $color[14] . '">' . $line . '</FONT>';
- } elseif ($Quotes) {
- if (! isset($color[13])) {
- $color[13] = '#800000';
- }
- $line = '<FONT COLOR="' . $color[13] . '">' . $line . '</FONT>';
- }
-
- $body_ary[$i] = $line;
- }
- $body = '<pre>' . implode("\n", $body_ary) . '</pre>';
- }
- /* debugfunction for looping through entities and displaying correct entities */
- function listMyEntities ($message) {
- if ($message) {
- if ($message->header->entity_id) {
- echo "<tt>" . $message->header->entity_id . ' : ' . $message->header->type0 . '/' . $message->header->type1 . '<br>';
- }
- if (!($message->header->type0 == 'message' && $message->header->type1 == 'rfc822')) {
- if (isset($message->header->boundary) ) {
- $ent_id = $message->header->entity_id;
- $var = $message->header->boundary;
- if ($var !='')
- echo "<b>$ent_id boundary = $var</b><br>";
- }
- if (isset($message->header->type) ) {
- $var = $message->header->type;
- if ($var !='')
- echo "<b>$ent_id type = $var</b><br>";
- }
- for ($i = 0; $message->entities[$i]; $i++) {
- $msg = listMyEntities($message->entities[$i]);
- }
- if ($msg ) return $msg;
- }
- }
- }
- /* This returns a parsed string called $body. That string can then
- be displayed as the actual message in the HTML. It contains
- everything needed, including HTML Tags, Attachments at the
- bottom, etc.
- */
- function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num) {
- // this if statement checks for the entity to show as the
- // primary message. To add more of them, just put them in the
- // order that is their priority.
- global $startMessage, $username, $key, $imapServerAddress, $imapPort,
- $show_html_default, $has_unsafe_images, $view_unsafe_images, $sort;
- $has_unsafe_images = 0;
- $id = $message->header->id;
- $urlmailbox = urlencode($message->header->mailbox);
- $body_message = getEntity($message, $ent_num);
- if (($body_message->header->type0 == 'text') ||
- ($body_message->header->type0 == 'rfc822')) {
- $body = mime_fetch_body ($imap_stream, $id, $ent_num);
-
- $body = decodeBody($body, $body_message->header->encoding);
- $hookResults = do_hook("message_body", $body);
- $body = $hookResults[1];
- // If there are other types that shouldn't be formatted, add
- // them here
- if ($body_message->header->type1 == 'html') {
- if ( $show_html_default <> 1 ) {
- $body = strip_tags( $body );
- translateText($body, $wrap_at, $body_message->header->charset);
- } else {
- $body = magicHTML( $body, $id, $message );
- }
- } else {
- translateText($body, $wrap_at, $body_message->header->charset);
- }
- $body .= "<CENTER><SMALL><A HREF=\"../src/download.php?absolute_dl=true&passed_id=$id&passed_ent_id=$ent_num&mailbox=$urlmailbox&showHeaders=1\">". _("Download this as a file") ."</A></SMALL></CENTER><BR>";
- if ($has_unsafe_images) {
- if ($view_unsafe_images) {
- $body .= "<CENTER><SMALL><A HREF=\"read_body.php?passed_id=$id&mailbox=$urlmailbox&sort=$sort&startMessage=$startMessage&show_more=0\">". _("Hide Unsafe Images") ."</A></SMALL></CENTER><BR>\n";
- } else {
- $body .= "<CENTER><SMALL><A HREF=\"read_body.php?passed_id=$id&mailbox=$urlmailbox&sort=$sort&startMessage=$startMessage&show_more=0&view_unsafe_images=1\">". _("View Unsafe Images") ."</A></SMALL></CENTER><BR>\n";
- }
- }
- /** Display the ATTACHMENTS: message if there's more than one part **/
- if (isset($message->entities[1])) {
- /* Header-type alternative means we choose the best one to display
- so don't show the alternatives as attachment. Header-type related
- means that the attachments are already part of the related message.
- */
- if ($message->header->type1 !='related' && $message->header->type1 !='alternative') {
- $body .= formatAttachments ($message, $ent_num, $message->header->mailbox, $id);
- }
- }
- } else {
- $body = formatAttachments ($message, -1, $message->header->mailbox, $id);
- }
- return ($body);
- }
- /*
- * A recursive function that returns a list of attachments with links
- * to where to download these attachments
- */
- function formatAttachments($message, $ent_id, $mailbox, $id) {
- global $where, $what;
- global $startMessage, $color;
- static $ShownHTML = 0;
- $body = '';
- if ($ShownHTML == 0) {
- $ShownHTML = 1;
- $body .= "<TABLE WIDTH=\"100%\" CELLSPACING=0 CELLPADDING=2 BORDER=0 BGCOLOR=\"$color[0]\"><TR>\n" .
- "<TH ALIGN=\"left\" BGCOLOR=\"$color[9]\"><B>\n" .
- _("Attachments") . ':' .
- "</B></TH></TR><TR><TD>\n" .
- "<TABLE CELLSPACING=0 CELLPADDING=1 BORDER=0>\n" .
- formatAttachments($message, $ent_id, $mailbox, $id) .
- "</TABLE></TD></TR></TABLE>";
- } else if ($message) {
- $header = $message->header;
- $type0 = strtolower($header->type0);
- $type1 = strtolower($header->type1);
- $name = '';
- if (isset($header->name)) {
- $name = decodeHeader($header->name);
- }
- if ($type0 =='message' && $type1 == 'rfc822') {
-
- $filename = decodeHeader($message->header->filename);
- if (trim($filename) == '') {
- if (trim($name) == '') {
- $display_filename = 'untitled-[' . $message->header->entity_id . ']' ;
- } else {
- $display_filename = $name;
- $filename = $name;
- }
- } else {
- $display_filename = $filename;
- }
- $urlMailbox = urlencode($mailbox);
- $ent = urlencode($message->header->entity_id);
- $DefaultLink =
- "../src/download.php?startMessage=$startMessage&passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$ent";
- if ($where && $what) {
- $DefaultLink .= '&where=' . urlencode($where) . '&what=' . urlencode($what);
- }
- $Links['download link']['text'] = _("download");
- $Links['download link']['href'] =
- "../src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$ent";
- $ImageURL = '';
- /* this executes the attachment hook with a specific MIME-type.
- * if that doens't have results, it tries if there's a rule
- * for a more generic type. */
- $HookResults = do_hook("attachment $type0/$type1", $Links,
- $startMessage, $id, $urlMailbox, $ent, $DefaultLink, $display_filename, $where, $what);
- if(count($HookResults[1]) <= 1) {
- $HookResults = do_hook("attachment $type0/*", $Links,
- $startMessage, $id, $urlMailbox, $ent, $DefaultLink,
- $display_filename, $where, $what);
- }
- $Links = $HookResults[1];
- $DefaultLink = $HookResults[6];
- $body .= '<TR><TD> </TD><TD>' .
- "<A HREF=\"$DefaultLink\">$display_filename</A> </TD>" .
- '<TD><SMALL><b>' . show_readable_size($message->header->size) .
- '</b> </small></TD>' .
- "<TD><SMALL>[ $type0/$type1 ] </SMALL></TD>" .
- '<TD><SMALL>';
- if ($message->header->description) {
- $body .= '<b>' . htmlspecialchars(_($message->header->description)) . '</b>';
- }
- $body .= '</SMALL></TD><TD><SMALL> ';
- $SkipSpaces = 1;
- foreach ($Links as $Val) {
- if ($SkipSpaces) {
- $SkipSpaces = 0;
- } else {
- $body .= ' | ';
- }
- $body .= '<a href="' . $Val['href'] . '">' . $Val['text'] . '</a>';
- }
- unset($Links);
- $body .= "</SMALL></TD></TR>\n";
-
- return( $body );
-
- } elseif (!$message->entities) {
- $type0 = strtolower($message->header->type0);
- $type1 = strtolower($message->header->type1);
- $name = decodeHeader($message->header->name);
- if ($message->header->entity_id != $ent_id) {
- $filename = decodeHeader($message->header->filename);
- if (trim($filename) == '') {
- if (trim($name) == '') {
- if ( trim( $message->header->id ) == '' )
- $display_filename = 'untitled-[' . $message->header->entity_id . ']' ;
- else
- $display_filename = 'cid: ' . $message->header->id;
- // $display_filename = 'untitled-[' . $message->header->entity_id . ']' ;
- } else {
- $display_filename = $name;
- $filename = $name;
- }
- } else {
- $display_filename = $filename;
- }
- $urlMailbox = urlencode($mailbox);
- $ent = urlencode($message->header->entity_id);
- $DefaultLink =
- "../src/download.php?startMessage=$startMessage&passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$ent";
- if ($where && $what) {
- $DefaultLink = '&where='. urlencode($where).'&what='.urlencode($what);
- }
- $Links['download link']['text'] = _("download");
- $Links['download link']['href'] =
- "../src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$ent";
- $ImageURL = '';
- /* this executes the attachment hook with a specific MIME-type.
- * if that doens't have results, it tries if there's a rule
- * for a more generic type. */
- $HookResults = do_hook("attachment $type0/$type1", $Links,
- $startMessage, $id, $urlMailbox, $ent, $DefaultLink,
- $display_filename, $where, $what);
- if(count($HookResults[1]) <= 1) {
- $HookResults = do_hook("attachment $type0/*", $Links,
- $startMessage, $id, $urlMailbox, $ent, $DefaultLink,
- $display_filename, $where, $what);
- }
- $Links = $HookResults[1];
- $DefaultLink = $HookResults[6];
- $body .= '<TR><TD> </TD><TD>' .
- "<A HREF=\"$DefaultLink\">$display_filename</A> </TD>" .
- '<TD><SMALL><b>' . show_readable_size($message->header->size) .
- '</b> </small></TD>' .
- "<TD><SMALL>[ $type0/$type1 ] </SMALL></TD>" .
- '<TD><SMALL>';
- if ($message->header->description) {
- $body .= '<b>' . htmlspecialchars(_($message->header->description)) . '</b>';
- }
- $body .= '</SMALL></TD><TD><SMALL> ';
- $SkipSpaces = 1;
- foreach ($Links as $Val) {
- if ($SkipSpaces) {
- $SkipSpaces = 0;
- } else {
- $body .= ' | ';
- }
- $body .= '<a href="' . $Val['href'] . '">' . $Val['text'] . '</a>';
- }
- unset($Links);
- $body .= "</SMALL></TD></TR>\n";
- }
- } else {
- for ($i = 0; $i < count($message->entities); $i++) {
- $body .= formatAttachments($message->entities[$i], $ent_id, $mailbox, $id);
- }
- }
- }
- return( $body );
- }
- /** this function decodes the body depending on the encoding type. **/
- function decodeBody($body, $encoding) {
- $body = str_replace("\r\n", "\n", $body);
- $encoding = strtolower($encoding);
- global $show_html_default;
- if ($encoding == 'quoted-printable' ||
- $encoding == 'quoted_printable') {
- $body = quoted_printable_decode($body);
- while (ereg("=\n", $body))
- $body = ereg_replace ("=\n", "", $body);
- } else if ($encoding == 'base64') {
- $body = base64_decode($body);
- }
- // All other encodings are returned raw.
- return $body;
- }
- /*
- * This functions decode strings that is encoded according to
- * RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text).
- * Patched by Christian Schmidt <christian@ostenfeld.dk> 23/03/2002
- */
- function decodeHeader ($string, $utfencode=true) {
- if (is_array($string)) {
- $string = implode("\n", $string);
- }
- $i = 0;
- while (preg_match('/^(.{' . $i . '})(.*)=\?([^?]*)\?(Q|B)\?([^?]*)\?=/Ui',
- $string, $res)) {
- $prefix = $res[1];
- // Ignore white-space between consecutive encoded-words
- if (strspn($res[2], " \t") != strlen($res[2])) {
- $prefix .= $res[2];
- }
- if (ucfirst($res[4]) == 'B') {
- $replace = base64_decode($res[5]);
- } else {
- $replace = str_replace('_', ' ', $res[5]);
- $replace = preg_replace('/=([0-9a-f]{2})/ie', 'chr(hexdec("\1"))',
- $replace);
- /* Only encode into entities by default. Some places
- don't need the encoding, like the compose form. */
- if ($utfencode) {
- $replace = charset_decode($res[3], $replace);
- }
- }
- $string = $prefix . $replace . substr($string, strlen($res[0]));
- $i = strlen($prefix) + strlen($replace);
- }
- return( $string );
- }
- /*
- * Encode a string according to RFC 1522 for use in headers if it
- * contains 8-bit characters or anything that looks like it should
- * be encoded.
- */
- function encodeHeader ($string) {
- global $default_charset;
- // Encode only if the string contains 8-bit characters or =?
- $j = strlen( $string );
- $l = strstr($string, '=?'); // Must be encoded ?
- $ret = '';
- for( $i=0; $i < $j; ++$i) {
- switch( $string{$i} ) {
- case '=':
- $ret .= '=3D';
- break;
- case '?':
- $ret .= '=3F';
- break;
- case '_':
- $ret .= '=5F';
- break;
- case ' ':
- $ret .= '_';
- break;
- default:
- $k = ord( $string{$i} );
- if ( $k > 126 ) {
- $ret .= sprintf("=%02X", $k);
- $l = TRUE;
- } else
- $ret .= $string{$i};
- }
- }
- if ( $l ) {
- $string = "=?$default_charset?Q?$ret?=";
- }
- return( $string );
- }
- /* This function trys to locate the entity_id of a specific mime element */
- function find_ent_id( $id, $message ) {
- $ret = '';
- for ($i=0; $ret == '' && $i < count($message->entities); $i++) {
- if (( $message->entities[$i]->header->type1 == 'alternative') ||
- ( $message->entities[$i]->header->type1 == 'related') ||
- ( $message->entities[$i]->header->type1 == 'mixed')) {
- $ret = find_ent_id( $id, $message->entities[$i] );
- } else {
- if ( strcasecmp( $message->entities[$i]->header->id, $id ) == 0 )
- $ret = $message->entities[$i]->header->entity_id;
- }
- }
- return( $ret );
- }
- /**
- ** HTMLFILTER ROUTINES
- */
- /**
- * This function returns the final tag out of the tag name, an array
- * of attributes, and the type of the tag. This function is called by
- * sq_sanitize internally.
- *
- * @param $tagname the name of the tag.
- * @param $attary the array of attributes and their values
- * @param $tagtype The type of the tag (see in comments).
- * @return a string with the final tag representation.
- */
- function sq_tagprint($tagname, $attary, $tagtype){
- $me = "sq_tagprint";
- if ($tagtype == 2){
- $fulltag = '</' . $tagname . '>';
- } else {
- $fulltag = '<' . $tagname;
- if (is_array($attary) && sizeof($attary)){
- $atts = Array();
- while (list($attname, $attvalue) = each($attary)){
- array_push($atts, "$attname=$attvalue");
- }
- $fulltag .= ' ' . join(" ", $atts);
- }
- if ($tagtype == 3){
- $fulltag .= " /";
- }
- $fulltag .= ">";
- }
- return $fulltag;
- }
- /**
- * A small helper function to use with array_walk. Modifies a by-ref
- * value and makes it lowercase.
- *
- * @param $val a value passed by-ref.
- * @return void since it modifies a by-ref value.
- */
- function sq_casenormalize(&$val){
- $val = strtolower($val);
- }
- /**
- * This function skips any whitespace from the current position within
- * a string and to the next non-whitespace value.
- *
- * @param $body the string
- * @param $offset the offset within the string where we should start
- * looking for the next non-whitespace character.
- * @return the location within the $body where the next
- * non-whitespace char is located.
- */
- function sq_skipspace($body, $offset){
- $me = "sq_skipspace";
- preg_match("/^(\s*)/s", substr($body, $offset), $matches);
- if (sizeof($matches{1})){
- $count = strlen($matches{1});
- $offset += $count;
- }
- return $offset;
- }
- /**
- * This function looks for the next character within a string. It's
- * really just a glorified "strpos", except it catches if failures
- * nicely.
- *
- * @param $body The string to look for needle in.
- * @param $offset Start looking from this position.
- * @param $needle The character/string to look for.
- * @return location of the next occurance of the needle, or
- * strlen($body) if needle wasn't found.
- */
- function sq_findnxstr($body, $offset, $needle){
- $me = "sq_findnxstr";
- $pos = strpos($body, $needle, $offset);
- if ($pos === FALSE){
- $pos = strlen($body);
- }
- return $pos;
- }
- /**
- * This function takes a PCRE-style regexp and tries to match it
- * within the string.
- *
- * @param $body The string to look for needle in.
- * @param $offset Start looking from here.
- * @param $reg A PCRE-style regex to match.
- * @return Returns a false if no matches found, or an array
- * with the following members:
- * - integer with the location of the match within $body
- * - string with whatever content between offset and the match
- * - string with whatever it is we matched
- */
- function sq_findnxreg($body, $offset, $reg){
- $me = "sq_findnxreg";
- $matches = Array();
- $retarr = Array();
- preg_match("%^(.*?)($reg)%s", substr($body, $offset), $matches);
- if (!$matches{0}){
- $retarr = false;
- } else {
- $retarr{0} = $offset + strlen($matches{1});
- $retarr{1} = $matches{1};
- $retarr{2} = $matches{2};
- }
- return $retarr;
- }
- /**
- * This function looks for the next tag.
- *
- * @param $body String where to look for the next tag.
- * @param $offset Start looking from here.
- * @return false if no more tags exist in the body, or
- * an array with the following members:
- * - string with the name of the tag
- * - array with attributes and their values
- * - integer with tag type (1, 2, or 3)
- * - integer where the tag starts (starting "<")
- * - integer where the tag ends (ending ">")
- * first three members will be false, if the tag is invalid.
- */
- function sq_getnxtag($body, $offset){
- $me = "sq_getnxtag";
- if ($offset > strlen($body)){
- return false;
- }
- $lt = sq_findnxstr($body, $offset, "<");
- if ($lt == strlen($body)){
- return false;
- }
- /**
- * We are here:
- * blah blah <tag attribute="value">
- * \---------^
- */
- $pos = sq_skipspace($body, $lt+1);
- if ($pos >= strlen($body)){
- return Array(false, false, false, $lt, strlen($body));
- }
- /**
- * There are 3 kinds of tags:
- * 1. Opening tag, e.g.:
- * <a href="blah">
- * 2. Closing tag, e.g.:
- * </a>
- * 3. XHTML-style content-less tag, e.g.:
- * <img src="blah"/>
- */
- $tagtype = false;
- switch (substr($body, $pos, 1)){
- case "/":
- $tagtype = 2;
- $pos++;
- break;
- case "!":
- /**
- * A comment or an SGML declaration.
- */
- if (substr($body, $pos+1, 2) == "--"){
- $gt = strpos($body, "-->", $pos);
- if ($gt === false){
- $gt = strlen($body);
- } else {
- $gt += 2;
- }
- return Array(false, false, false, $lt, $gt);
- } else {
- $gt = sq_findnxstr($body, $pos, ">");
- return Array(false, false, false, $lt, $gt);
- }
- break;
- default:
- /**
- * Assume tagtype 1 for now. If it's type 3, we'll switch values
- * later.
- */
- $tagtype = 1;
- break;
- }
- $tag_start = $pos;
- $tagname = '';
- /**
- * Look for next [\W-_], which will indicate the end of the tag name.
- */
- $regary = sq_findnxreg($body, $pos, "[^\w\-_]");
- if ($regary == false){
- return Array(false, false, false, $lt, strlen($body));
- }
- list($pos, $tagname, $match) = $regary;
- $tagname = strtolower($tagname);
- /**
- * $match can be either of these:
- * '>' indicating the end of the tag entirely.
- * '\s' indicating the end of the tag name.
- * '/' indicating that this is type-3 xhtml tag.
- *
- * Whatever else we find there indicates an invalid tag.
- */
- switch ($match){
- case "/":
- /**
- * This is an xhtml-style tag with a closing / at the
- * end, like so: <img src="blah"/>. Check if it's followed
- * by the closing bracket. If not, then this tag is invalid
- */
- if (substr($body, $pos, 2) == "/>"){
- $pos++;
- $tagtype = 3;
- } else {
- $gt = sq_findnxstr($body, $pos, ">");
- $retary = Array(false, false, false, $lt, $gt);
- return $retary;
- }
- case ">":
- return Array($tagname, false, $tagtype, $lt, $pos);
- break;
- default:
- /**
- * Check if it's whitespace
- */
- if (preg_match("/\s/", $match)){
- } else {
- /**
- * This is an invalid tag! Look for the next closing ">".
- */
- $gt = sq_findnxstr($body, $offset, ">");
- return Array(false, false, false, $lt, $gt);
- }
- }
-
- /**
- * At this point we're here:
- * <tagname attribute='blah'>
- * \-------^
- *
- * At this point we loop in order to find all attributes.
- */
- $attname = '';
- $atttype = false;
- $attary = Array();
- while ($pos <= strlen($body)){
- $pos = sq_skipspace($body, $pos);
- if ($pos == strlen($body)){
- /**
- * Non-closed tag.
- */
- return Array(false, false, false, $lt, $pos);
- }
- /**
- * See if we arrived at a ">" or "/>", which means that we reached
- * the end of the tag.
- */
- $matches = Array();
- if (preg_match("%^(\s*)(>|/>)%s", substr($body, $pos), $matches)) {
- /**
- * Yep. So we did.
- */
- $pos += strlen($matches{1});
- if ($matches{2} == "/>"){
- $tagtype = 3;
- $pos++;
- }
- return Array($tagname, $attary, $tagtype, $lt, $pos);
- }
- /**
- * There are several types of attributes, with optional
- * [:space:] between members.
- * Type 1:
- * attrname[:space:]=[:space:]'CDATA'
- * Type 2:
- * attrname[:space:]=[:space:]"CDATA"
- * Type 3:
- * attr[:space:]=[:space:]CDATA
- * Type 4:
- * attrname
- *
- * We leave types 1 and 2 the same, type 3 we check for
- * '"' and convert to """ if needed, then wrap in
- * double quotes. Type 4 we convert into:
- * attrname="yes".
- */
- $regary = sq_findnxreg($body, $pos, "[^\w\-_]");
- if ($regary == false){
- /**
- * Looks like body ended before the end of tag.
- */
- return Array(false, false, false, $lt, strlen($body));
- }
- list($pos, $attname, $match) = $regary;
- $attname = strtolower($attname);
- /**
- * We arrived at the end of attribute name. Several things possible
- * here:
- * '>' means the end of the tag and this is attribute type 4
- * '/' if followed by '>' means the same thing as above
- * '\s' means a lot of things -- look what it's followed by.
- * anything else means the attribute is invalid.
- */
- switch($match){
- case "/":
- /**
- * This is an xhtml-style tag with a closing / at the
- * end, like so: <img src="blah"/>. Check if it's followed
- * by the closing bracket. If not, then this tag is invalid
- */
- if (substr($body, $pos, 2) == "/>"){
- $pos++;
- $tagtype = 3;
- } else {
- $gt = sq_findnxstr($body, $pos, ">");
- $retary = Array(false, false, false, $lt, $gt);
- return $retary;
- }
- case ">":
- $attary{$attname} = '"yes"';
- return Array($tagname, $attary, $tagtype, $lt, $pos);
- break;
- default:
- /**
- * Skip whitespace and see what we arrive at.
- */
- $pos = sq_skipspace($body, $pos);
- $char = substr($body, $pos, 1);
- /**
- * Two things are valid here:
- * '=' means this is attribute type 1 2 or 3.
- * \w means this was attribute type 4.
- * anything else we ignore and re-loop. End of tag and
- * invalid stuff will be caught by our checks at the beginning
- * of the loop.
- */
- if ($char == "="){
- $pos++;
- $pos = sq_skipspace($body, $pos);
- /**
- * Here are 3 possibilities:
- * "'" attribute type 1
- * '"' attribute type 2
- * everything else is the content of tag type 3
- */
- $quot = substr($body, $pos, 1);
- if ($quot == "'"){
- $regary = sq_findnxreg($body, $pos+1, "\'");
- if ($regary == false){
- return Array(false, false, false, $lt, strlen($body));
- }
- list($pos, $attval, $match) = $regary;
- $pos++;
- $attary{$attname} = "'" . $attval . "'";
- } else if ($quot == '"'){
- $regary = sq_findnxreg($body, $pos+1, '\"');
- if ($regary == false){
- return Array(false, false, false, $lt, strlen($body));
- }
- list($pos, $attval, $match) = $regary;
- $pos++;
- $attary{$attname} = '"' . $attval . '"';
- } else {
- /**
- * These are hateful. Look for \s, or >.
- */
- $regary = sq_findnxreg($body, $pos, "[\s>]");
- if ($regary == false){
- return Array(false, false, false, $lt, strlen($body));
- }
- list($pos, $attval, $match) = $regary;
- /**
- * If it's ">" it will be caught at the top.
- */
- $attval = preg_replace("/\"/s", """, $attval);
- $attary{$attname} = '"' . $attval . '"';
- }
- } else if (preg_match("|[\w/>]|", $char)) {
- /**
- * That was attribute type 4.
- */
- $attary{$attname} = '"yes"';
- } else {
- /**
- * An illegal character. Find next '>' and return.
- */
- $gt = sq_findnxstr($body, $pos, ">");
- return Array(false, false, false, $lt, $gt);
- }
- }
- }
- /**
- * The fact that we got here indicates that the tag end was never
- * found. Return invalid tag indication so it gets stripped.
- */
- return Array(false, false, false, $lt, strlen($body));
- }
- /**
- * This function checks attribute values for entity-encoded values
- * and returns them translated into 8-bit strings so we can run
- * checks on them.
- *
- * @param $attvalue A string to run entity check against.
- * @return Translated value.
- */
- function sq_deent($attvalue){
- $me="sq_deent";
- /**
- * See if we have to run the checks first. All entities must start
- * with "&".
- */
- if (strpos($attvalue, "&") === false){
- return $attvalue;
- }
- /**
- * Check named entities first.
- */
- $trans = get_html_translation_table(HTML_ENTITIES);
- /**
- * Leave " in, as it can mess us up.
- */
- $trans = array_flip($trans);
- unset($trans{"""});
- while (list($ent, $val) = each($trans)){
- $attvalue = preg_replace("/$ent*(\W)/si", "$val\\1", $attvalue);
- }
- /**
- * Now translate numbered entities from 1 to 255 if needed.
- */
- if (strpos($attvalue, "#") !== false){
- $omit = Array(34, 39);
- for ($asc=1; $asc<256; $asc++){
- if (!in_array($asc, $omit)){
- $chr = chr($asc);
- $attvalue = preg_replace("/\�*$asc;*(\D)/si", "$chr\\1",
- $attvalue);
- $attvalue = preg_replace("/\�*".dechex($asc).";*(\W)/si",
- "$chr\\1", $attvalue);
- }
- }
- }
- return $attvalue;
- }
- /**
- * This function runs various checks against the attributes.
- *
- * @param $tagname String with the name of the tag.
- * @param $attary Array with all tag attributes.
- * @param $rm_attnames See description for sq_sanitize
- * @param $bad_attvals See description for sq_sanitize
- * @param $add_attr_to_tag See description for sq_sanitize
- * @param $message message object
- * @param $id message id
- * @return Array with modified attributes.
- */
- function sq_fixatts($tagname,
- $attary,
- $rm_attnames,
- $bad_attvals,
- $add_attr_to_tag,
- $message,
- $id
- ){
- $me = "sq_fixatts";
- while (list($attname, $attvalue) = each($attary)){
- /**
- * See if this attribute should be removed.
- */
- foreach ($rm_attnames as $matchtag=>$matchattrs){
- if (preg_match($matchtag, $tagname)){
- foreach ($matchattrs as $matchattr){
- if (preg_match($matchattr, $attname)){
- unset($attary{$attname});
- continue;
- }
- }
- }
- }
- /**
- * Remove any entities.
- */
- $attvalue = sq_deent($attvalue);
- /**
- * Now let's run checks on the attvalues.
- * I don't expect anyone to comprehend this. If you do,
- * get in touch with me so I can drive to where you live and
- * shake your hand personally. :)
- */
- foreach ($bad_attvals as $matchtag=>$matchattrs){
- if (preg_match($matchtag, $tagname)){
- foreach ($matchattrs as $matchattr=>$valary){
- if (preg_match($matchattr, $attname)){
- /**
- * There are two arrays in valary.
- * First is matches.
- * Second one is replacements
- */
- list($valmatch, $valrepl) = $valary;
- $newvalue =
- preg_replace($valmatch, $valrepl, $attvalue);
- if ($newvalue != $attvalue){
- $attary{$attname} = $newvalue;
- }
- }
- }
- }
- }
- /**
- * Turn cid: urls into http-friendly ones.
- */
- if (preg_match("/^[\'\"]\s*cid:/si", $attvalue)){
- $attary{$attname} = sq_cid2http($message, $id, $attvalue);
- }
- }
- /**
- * See if we need to append any attributes to this tag.
- */
- foreach ($add_attr_to_tag as $matchtag=>$addattary){
- if (preg_match($matchtag, $tagname)){
- $attary = array_merge($attary, $addattary);
- }
- }
- return $attary;
- }
- /**
- * This function edits the style definition to make them friendly and
- * usable in squirrelmail.
- *
- * @param $message the message object
- * @param $id the message id
- * @param $content a string with whatever is between <style> and </style>
- * @return a string with edited content.
- */
- function sq_fixstyle($message, $id, $content){
- global $view_unsafe_images;
- $me = "sq_fixstyle";
- /**
- * First look for general BODY style declaration, which would be
- * like so:
- * body {background: blah-blah}
- * and change it to .bodyclass so we can just assign it to a <div>
- */
- $content = preg_replace("|body(\s*\{.*?\})|si", ".bodyclass\\1", $content);
- $secremoveimg = "../images/" . _("sec_remove_eng.png");
- /**
- * Fix url('blah') declarations.
- */
- $content = preg_replace("|url\(([\'\"])\s*\S+script\s*:.*?([\'\"])\)|si",
- "url(\\1$secremoveimg\\2)", $content);
- /**
- * Fix url('https*://.*) declarations but only if $view_unsafe_images
- * is false.
- */
- if (!$view_unsafe_images){
- $content = preg_replace("|url\(([\'\"])\s*https*:.*?([\'\"])\)|si",
- "url(\\1$secremoveimg\\2)", $content);
- }
-
- /**
- * Fix urls that refer to cid:
- */
- while (preg_match("|url\(([\'\"]\s*cid:.*?[\'\"])\)|si", $content,
- $matches)){
- $cidurl = $matches{1};
- $httpurl = sq_cid2http($message, $id, $cidurl);
- $content = preg_replace("|url\($cidurl\)|si",
- "url($httpurl)", $content);
- }
- /**
- * Fix stupid css declarations which lead to vulnerabilities
- * in IE.
- */
- $match = Array('/expression/si',
- '/behaviou*r/si',
- '/binding/si');
- $replace = Array('idiocy', 'idiocy', 'idiocy');
- $content = preg_replace($match, $replace, $content);
- return $content;
- }
- /**
- * This function converts cid: url's into the ones that can be viewed in
- * the browser.
- *
- * @param $message the message object
- * @param $id the message id
- * @param $cidurl the cid: url.
- * @return a string with a http-friendly url
- */
- function sq_cid2http($message, $id, $cidurl){
- /**
- * Get rid of quotes.
- */
- $quotchar = substr($cidurl, 0, 1);
- $cidurl = str_replace($quotchar, "", $cidurl);
- $cidurl = substr(trim($cidurl), 4);
- $httpurl = $quotchar . "../src/download.php?absolute_dl=true&" .
- "passed_id=$id&mailbox=" . urlencode($message->header->mailbox) .
- "&passed_ent_id=" . find_ent_id($cidurl, $message) . $quotchar;
- return $httpurl;
- }
- /**
- * This function changes the <body> tag into a <div> tag since we
- * can't really have a body-within-body.
- *
- * @param $attary an array of attributes and values of <body>
- * @return a modified array of attributes to be set for <div>
- */
- function sq_body2div($attary){
- $me = "sq_body2div";
- $divattary = Array("class"=>"'bodyclass'");
- $bgcolor="#ffffff";
- $text="#000000";
- $styledef="";
- if (is_array($attary) && sizeof($attary) > 0){
- foreach ($attary as $attname=>$attvalue){
- $quotchar = substr($attvalue, 0, 1);
- $attvalue = str_replace($quotchar, "", $attvalue);
- switch ($attname){
- case "background":
- $styledef .= "background-image: url('$attvalue'); ";
- break;
- case "bgcolor":
- $styledef .= "background-color: $attvalue; ";
- break;
- case "text":
- $styledef .= "color: $attvalue; ";
- }
- }
- if (strlen($styledef) > 0){
- $divattary{"style"} = "\"$styledef\"";
- }
- }
- return $divattary;
- }
- /**
- * This is the main function and the one you should actually be calling.
- * There are several variables you should be aware of an which need
- * special description.
- *
- * Since the description is quite lengthy, see it here:
- * http://www.mricon.com/html/phpfilter.html
- *
- * @param $body the string with HTML you wish to filter
- * @param $tag_list see description above
- * @param $rm_tags_with_content see description above
- * @param $self_closing_tags see description above
- * @param $force_tag_closing see description above
- * @param $rm_attnames see description above
- * @param $bad_attvals see description above
- * @param $add_attr_to_tag see description above
- * @param $message message object
- * @param $id message id
- * @return sanitized html safe to show on your pages.
- */
- function sq_sanitize($body,
- $tag_list,
- $rm_tags_with_content,
- $self_closing_tags,
- $force_tag_closing,
- $rm_attnames,
- $bad_attvals,
- $add_attr_to_tag,
- $message,
- $id
- ){
- $me = "sq_sanitize";
- /**
- * Normalize rm_tags and rm_tags_with_content.
- */
- @array_walk($rm_tags, 'sq_casenormalize');
- @array_walk($rm_tags_with_content, 'sq_casenormalize');
- @array_walk($self_closing_tags, 'sq_casenormalize');
- /**
- * See if tag_list is of tags to remove or tags to allow.
- * false means remove these tags
- * true means allow these tags
- */
- $rm_tags = array_shift($tag_list);
- $curpos = 0;
- $open_tags = Array();
- $trusted = "<!-- begin sanitized html -->\n";
- $skip_content = false;
- /**
- * Take care of netscape's stupid javascript entities like
- * &{alert('boo')};
- */
- $body = preg_replace("/&(\{.*?\};)/si", "&\\1", $body);
- while (($curtag=sq_getnxtag($body, $curpos)) != FALSE){
- list($tagname, $attary, $tagtype, $lt, $gt) = $curtag;
- $free_content = substr($body, $curpos, $lt-$curpos);
- /**
- * Take care of <style>
- */
- if ($tagname == "style" && $tagtype == 2){
- /**
- * This is a closing </style>. Edit the
- * content before we apply it.
- */
- $free_content = sq_fixstyle($message, $id, $free_content);
- }
- if ($skip_content == false){
- $trusted .= $free_content;
- } else {
- }
- if ($tagname != FALSE){
- if ($tagtype == 2){
- if ($skip_content == $tagname){
- /**
- * Got to the end of tag we needed to remove.
- */
- $tagname = false;
- $skip_content = false;
- } else {
- if ($skip_content == false){
- if ($tagname == "body"){
- $tagname = "div";
- } else {
- if (isset($open_tags{$tagname}) &&
- $open_tags{$tagname} > 0){
- $open_tags{$tagname}--;
- } else {
- $tagname = false;
- }
- }
- } else {
- }
- }
- } else {
- /**
- * $rm_tags_with_content
- */
- if ($skip_content == false){
- /**
- * See if this is a self-closing type and change
- * tagtype appropriately.
- */
- if ($tagtype == 1
- && in_array($tagname, $self_closing_tags)){
- $tagtype=3;
- }
- /**
- * See if we should skip this tag and any content
- * inside it.
- */
- if ($tagtype == 1 &&
- in_array($tagname, $rm_tags_with_content)){
- $skip_content = $tagname;
- } else {
- if (($rm_tags == false
- && in_array($tagname, $tag_list)) ||
- ($rm_tags == true &&
- !in_array($tagname, $tag_list))){
- $tagname = false;
- } else {
- if ($tagtype == 1){
- if (isset($open_tags{$tagname})){
- $open_tags{$tagname}++;
- } else {
- $open_tags{$tagname}=1;
- }
- }
- /**
- * This is where we run other checks.
- */
- if (is_array($attary) && sizeof($attary) > 0){
- $attary = sq_fixatts($tagname,
- $attary,
- $rm_attnames,
- $bad_attvals,
- $add_attr_to_tag,
- $message,
- $id
- );
- }
- /**
- * Convert body into div.
- */
- if ($tagname == "body"){
- $tagname = "div";
- $attary = sq_body2div($attary, $message, $id);
- }
- }
- }
- } else {
- }
- }
- if ($tagname != false && $skip_content == false){
- $trusted .= sq_tagprint($tagname, $attary, $tagtype);
- }
- } else {
- }
- $curpos = $gt+1;
- }
- $trusted .= substr($body, $curpos, strlen($body)-$curpos);
- if ($force_tag_closing == true){
- foreach ($open_tags as $tagname=>$opentimes){
- while ($opentimes > 0){
- $trusted .= '</' . $tagname . '>';
- $opentimes--;
- }
- }
- $trusted .= "\n";
- }
- $trusted .= "<!-- end sanitized html -->\n";
- return $trusted;
- }
- /**
- * This is a wrapper function to call html sanitizing routines.
- *
- * @param $body the body of the message
- * @param $id the id of the message
- * @return a string with html safe to display in the browser.
- */
- function magicHTML($body, $id, $message){
- global $attachment_common_show_images, $view_unsafe_images,
- $has_unsafe_images;
- /**
- * Don't display attached images in HTML mode.
- */
- $attachment_common_show_images = false;
- $tag_list = Array(
- false,
- "object",
- "meta",
- "html",
- "head",
- "base"
- );
- $rm_tags_with_content = Array(
- "script",
- "applet",
- "embed",
- "title"
- );
- $self_closing_tags = Array(
- "img",
- "br",
- "hr",
- "input"
- );
- $force_tag_closing = false;
- $rm_attnames = Array(
- "/.*/" =>
- Array(
- "/target/si",
- "/^on.*/si",
- "/^dynsrc/si",
- "/^data.*/si"
- )
- );
- $secremoveimg = "../images/" . _("sec_remove_eng.png");
- $bad_attvals = Array(
- "/.*/" =>
- Array(
- "/^src|background/i" =>
- Array(
- Array(
- "|^([\'\"])\s*\.\./.*([\'\"])|si",
- "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si",
- "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si",
- "/^([\'\"])\s*about\s*:.*([\'\"])/si"
- ),
- Array(
- "\\1$secremoveimg\\2",
- "\\1$secremoveimg\\2",
- "\\1$secremoveimg\\2",
- "\\1$secremoveimg\\2"
- )
- ),
- "/^href|action/i" =>
- Array(
- Array(
- "|^([\'\"])\s*\.\./.*([\'\"])|si",
- "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si",
- "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si",
- "/^([\'\"])\s*about\s*:.*([\'\"])/si"
- ),
- Array(
- "\\1#\\2",
- "\\1#\\2",
- "\\1#\\2",
- "\\1#\\2"
- )
- ),
- "/^style/si" =>
- Array(
- Array(
- "/expression/si",
- "/binding/si",
- "/behaviou*r/si",
- "|url\(([\'\"])\s*\.\./.*([\'\"])\)|si",
- "/url\(([\'\"])\s*\S+script\s*:.*([\'\"])\)/si",
- "/url\(([\'\"])\s*mocha\s*:.*([\'\"])\)/si",
- "/url\(([\'\"])\s*about\s*:.*([\'\"])\)/si"
- ),
- Array(
- "idiocy",
- "idiocy",
- "idiocy",
- "url(\\1#\\2)",
- "url(\\1#\\2)",
- "url(\\1#\\2)",
- "url(\\1#\\2)"
- )
- )
- )
- );
- if (!$view_unsafe_images){
- /**
- * Remove any references to http/https if view_unsafe_images set
- * to false.
- */
- array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[0],
- '/^([\'\"])\s*https*:.*([\'\"])/si');
- array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[1],
- "\\1$secremoveimg\\2");
- array_push($bad_attvals{'/.*/'}{'/^style/si'}[0],
- '/url\(([\'\"])\s*https*:.*([\'\"])\)/si');
- array_push($bad_attvals{'/.*/'}{'/^style/si'}[1],
- "url(\\1$secremoveimg\\2)");
- }
- $add_attr_to_tag = Array(
- "/^a$/si" => Array('target'=>'"_new"')
- );
- $trusted = sq_sanitize($body,
- $tag_list,
- $rm_tags_with_content,
- $self_closing_tags,
- $force_tag_closing,
- $rm_attnames,
- $bad_attvals,
- $add_attr_to_tag,
- $message,
- $id
- );
- if (preg_match("|$secremoveimg|si", $trusted)){
- $has_unsafe_images = true;
- }
- return $trusted;
- }
- ?>
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