X-Git-Url: https://vcs.fsf.org/?a=blobdiff_plain;f=functions%2Fmime.php;h=7bacc8625658c2136a934e44a7b2fef7d467dc3e;hb=3b84e1b10d0800d858a68283bce298d15677ce58;hp=ea36c5a077a17a7071f0dc39e881ada150c30b3a;hpb=0b648a5f172688fe16f5380e5fca687d5a8166ec;p=squirrelmail.git diff --git a/functions/mime.php b/functions/mime.php index ea36c5a0..7bacc862 100644 --- a/functions/mime.php +++ b/functions/mime.php @@ -3,75 +3,91 @@ /** * mime.php * - * Copyright (c) 1999-2002 The SquirrelMail Project Team + * Copyright (c) 1999-2004 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. * - * $Id$ + * @version $Id$ + * @package squirrelmail */ -require_once('../functions/imap.php'); -require_once('../functions/attachment_common.php'); +/** The typical includes... */ +require_once(SM_PATH . 'functions/imap.php'); +require_once(SM_PATH . 'functions/attachment_common.php'); -/* --------------------------------------------------------------------------------- */ -/* MIME DECODING */ -/* --------------------------------------------------------------------------------- */ +/* -------------------------------------------------------------------------- */ +/* MIME DECODING */ +/* -------------------------------------------------------------------------- */ -/* This function gets the structure of a message and stores it in the "message" class. +/** + * Get the MIME structure + * + * 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 ($bodystructure, $flags=array()) { - // isolate the body structure and remove beginning and end parenthesis + /* Isolate the body structure and remove beginning and end parenthesis. */ $read = trim(substr ($bodystructure, strpos(strtolower($bodystructure), 'bodystructure') + 13)); - $msg = &new message(); $read = trim(substr ($read, 0, -1)); - $res = $msg->parseStructure($read); - $msg = $res[0]; - $msg->setEnt('0'); + $i = 0; + $msg = Message::parseStructure($read,$i); + if (!is_object($msg)) { + include_once(SM_PATH . 'functions/display_messages.php'); + global $color, $mailbox; + /* removed urldecode because $_GET is auto urldecoded ??? */ + displayPageHeader( $color, $mailbox ); + $errormessage = _("SquirrelMail could not decode the bodystructure of the message"); + $errormessage .= '
'._("the provided bodystructure by your imap-server").':

'; + $errormessage .= '
' . htmlspecialchars($read) . '
'; + plain_error_message( $errormessage, $color ); + echo ''; + exit; + } if (count($flags)) { - foreach ($flags as $flag) { - $char = strtoupper($flag{1}); - switch ($char) { - case 'S': - if (strtolower($flag) == '\\seen') { - $msg->is_seen = true; - } - break; - case 'A': - if (strtolower($flag) == '\\answered') { - $msg->is_answered = true; - } - break; - case 'D': - if (strtolower($flag) == '\\deleted') { - $msg->is_deleted = true; - } - break; - case 'F': - if (strtolower($flag) == '\\flagged') { - $msg->is_flagged = true; - } - break; - case 'M': - if (strtolower($flag) == '$mdnsent') { - $msg->is_mdnsent = true; - } - break; - default: - break; - } - } + foreach ($flags as $flag) { + $char = strtoupper($flag{1}); + switch ($char) { + case 'S': + if (strtolower($flag) == '\\seen') { + $msg->is_seen = true; + } + break; + case 'A': + if (strtolower($flag) == '\\answered') { + $msg->is_answered = true; + } + break; + case 'D': + if (strtolower($flag) == '\\deleted') { + $msg->is_deleted = true; + } + break; + case 'F': + if (strtolower($flag) == '\\flagged') { + $msg->is_flagged = true; + } + break; + case 'M': + if (strtolower($flag) == '$mdnsent') { + $msg->is_mdnsent = true; + } + break; + default: + break; + } + } } -// listEntities($msg); - return( $msg ); + // listEntities($msg); + return $msg; } -/* this starts the parsing of a particular structure. It is called recursively, + + +/* 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 * $message. * First, it checks to see if it is a multipart message. If it is, then it @@ -80,92 +96,106 @@ function mime_structure ($bodystructure, $flags=array()) { * to mime_get_elements() */ -function mime_fetch_body($imap_stream, $id, $ent_id) { - global $uid_support; - /* - * do a bit of error correction. If we couldn't find the entity id, just guess +function mime_fetch_body($imap_stream, $id, $ent_id=1, $fetch_size=0) { + /* Do a bit of error correction. If we couldn't find the entity id, just guess * that it is the first one. That is usually the case anyway. */ + if (!$ent_id) { - $ent_id = 1; + $cmd = "FETCH $id BODY[]"; + } else { + $cmd = "FETCH $id BODY[$ent_id]"; } - $cmd = "FETCH $id BODY[$ent_id]"; - - $data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message, $uid_support); + + if ($fetch_size!=0) $cmd .= "<0.$fetch_size>"; + + $data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message, TRUE); do { - $topline = trim(array_shift( $data )); - } while( $topline && $topline[0] == '*' && !preg_match( '/\* [0-9]+ FETCH.*/i', $topline )) ; + $topline = trim(array_shift($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, $uid_support); - } + $ret = substr($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, TRUE); +// } } else if (ereg('"([^"]*)"', $topline, $regs)) { $ret = $regs[1]; } else { global $where, $what, $mailbox, $passed_id, $startMessage; - $par = 'mailbox=' . urlencode($mailbox) . "&passed_id=$passed_id"; + $par = 'mailbox=' . urlencode($mailbox) . '&passed_id=' . $passed_id; if (isset($where) && isset($what)) { - $par .= '&where='. urlencode($where) . "&what=" . urlencode($what); + $par .= '&where=' . urlencode($where) . '&what=' . urlencode($what); } else { - $par .= "&startMessage=$startMessage&show_more=0"; + $par .= '&startMessage=' . $startMessage . '&show_more=0'; } $par .= '&response=' . urlencode($response) . - '&message=' . urlencode($message). - '&topline=' . urlencode($topline); + '&message=' . urlencode($message) . + '&topline=' . urlencode($topline); - echo '
' . + echo '
' . '' . - '' . - '" . - '" . - '" . - '" . - "
' . - _("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!") . - "
" . - _("Submit message") . '
 ' . + '
' . + _("Body retrieval error. The reason for this is most probably that the message is malformed.") . '
' . _("Command:") . "$cmd
' . _("Response:") . "$response
' . _("Message:") . "$message
' . _("FETCH line:") . "$topline

"; + '' . _("Command:") . "$cmd" . + '' . _("Response:") . "$response" . + '' . _("Message:") . "$message" . + '' . _("FETCH line:") . "$topline" . + "
"; - $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message, $uid_support); + $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message, TRUE); array_shift($data); $wholemessage = implode('', $data); $ret = $wholemessage; } - return( $ret ); + return $ret; } -function mime_print_body_lines ($imap_stream, $id, $ent_id, $encoding) { - global $uid_support; - // do a bit of error correction. If we couldn't find the entity id, just guess - // that it is the first one. That is usually the case anyway. - if (!$ent_id) { - $ent_id = 1; - } - $sid = sqimap_session_id($uid_support); - // Don't kill the connection if the browser is over a dialup - // and it would take over 30 seconds to download it. +function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding) { + + /* Don't kill the connection if the browser is over a dialup + * and it would take over 30 seconds to download it. + * Don't call set_time_limit in safe mode. + */ - // don´t call set_time_limit in safe mode. - if (!ini_get("safe_mode")) { + if (!ini_get('safe_mode')) { set_time_limit(0); } - if ($uid_support) { - $sid_s = substr($sid,0,strpos($sid, ' ')); + /* in case of base64 encoded attachments, do not buffer them. + Instead, echo the decoded attachment directly to screen */ + if (strtolower($encoding) == 'base64') { + if (!$ent_id) { + $query = "FETCH $id BODY[]"; + } else { + $query = "FETCH $id BODY[$ent_id]"; + } + sqimap_run_command($imap_stream,$query,true,$response,$message,TRUE,'sqimap_base64_decode','php://stdout',true); } else { - $sid_s = $sid; + $body = mime_fetch_body ($imap_stream, $id, $ent_id); + echo decodeBody($body, $encoding); } - $body = mime_fetch_body ($imap_stream, $id, $ent_id); - echo decodeBody($body, $encoding); + /* + TODO, use the same method for quoted printable. + However, I assume that quoted printable attachments aren't that large + so the performancegain / memory usage drop will be minimal. + If we decide to add that then we need to adapt sqimap_fread because + we need to split te result on \n and fread doesn't stop at \n. That + means we also should provide $results from sqimap_fread (by ref) to + te function and set $no_return to false. The $filter function for + quoted printable should handle unsetting of $results. + */ + /* + TODO 2: find out how we write to the output stream php://stdout. fwrite + doesn't work because 'php://stdout isn't a stream. + */ + return; /* fputs ($imap_stream, "$sid FETCH $id BODY[$ent_id]\r\n"); @@ -198,67 +228,49 @@ function mime_print_body_lines ($imap_stream, $id, $ent_id, $encoding) { /* -[ END MIME DECODING ]----------------------------------------------------------- */ -/* findDisplayEntity - * Checks to see if $message contains content of type $type0/$type1 - * returns the first entity number it finds of that type, or NULL if - * none is found. Takes optional argument $start to allow the caller - * to continue where they left off +/* This is here for debugging purposes. It will print out a list + * of all the entity IDs that are in the $message object. */ -function findDisplayEntity($message, $type0, $type1, $start=0) { +function listEntities ($message) { if ($message) { - for ($i = $start;isset($message->entities[$i]); $i++) { - $entity = $message->entities[$i]; - if ($entity->type0 == $type0 && $entity->type1 == $type1) { - return $i; + echo "" . $message->entity_id . ' : ' . $message->type0 . '/' . $message->type1 . ' parent = '. $message->parent->entity_id. '
'; + for ($i = 0; isset($message->entities[$i]); $i++) { + echo "$i : "; + $msg = listEntities($message->entities[$i]); + + if ($msg) { + echo "return: "; + return $msg; } } } - return NULL; } -// This is here for debugging purposese. It will print out a list -// of all the entity IDs that are in the $message object. +function getPriorityStr($priority) { + $priority_level = substr($priority,0,1); + + switch($priority_level) { + /* Check for a higher then normal priority. */ + case '1': + case '2': + $priority_string = _("High"); + break; -function listEntities ($message) { - if ($message) { - echo "" . $message->entity_id . ' : ' . $message->type0 . '/' . $message->type1 . ' parent = '. $message->parent->entity_id. '
'; - for ($i = 0;isset($message->entities[$i]); $i++) { - echo "$i : "; - $msg = listEntities($message->entities[$i]); - - if ($msg) { - echo "return: "; - return $msg; - } - } - } -} + /* Check for a lower then normal priority. */ + case '4': + case '5': + $priority_string = _("Low"); + break; -function getPriorityStr($priority) { - $priority_level = substr($priority,0,1); - - switch($priority_level) { - /* check for a higher then normal priority. */ - case '1': - case '2': - $priority_string = _("High"); - break; - - /* check for a lower then normal priority. */ - case '4': - case '5': - $priority_string = _("Low"); - break; - - /* check for a normal priority. */ - case '3': - default: - $priority_level = '3'; - $priority_string = _("Normal"); - break; - - } - return $priority_string; + /* Check for a normal priority. */ + case '3': + default: + $priority_level = '3'; + $priority_string = _("Normal"); + break; + + } + return $priority_string; } /* returns a $message object for a particular entity id */ @@ -266,19 +278,17 @@ function getEntity ($message, $ent_id) { return $message->getEntity($ent_id); } -/* - * translateText +/* translateText * Extracted from strings.php 23/03/2002 */ function translateText(&$body, $wrap_at, $charset) { - global $where, $what; /* from searching */ - global $color; /* color theme */ + global $where, $what; /* from searching */ + global $color; /* color theme */ - require_once('../functions/url_parser.php'); + require_once(SM_PATH . '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 >= $wrap_at) { @@ -289,92 +299,129 @@ function translateText(&$body, $wrap_at, $charset) { parseUrl ($line); - $Quotes = 0; + $quotes = 0; $pos = 0; - $j = strlen( $line ); + $j = strlen($line); - while ( $pos < $j ) { + while ($pos < $j) { if ($line[$pos] == ' ') { - $pos ++; + $pos++; } else if (strpos($line, '>', $pos) === $pos) { $pos += 4; - $Quotes ++; + $quotes++; } else { break; } } - - if ($Quotes > 1) { - if (! isset($color[14])) { - $color[14] = '#FF0000'; - } - $line = '' . $line . ''; - } elseif ($Quotes) { - if (! isset($color[13])) { + + if ($quotes % 2) { + if (!isset($color[13])) { $color[13] = '#800000'; } - $line = '' . $line . ''; + $line = '' . $line . ''; + } elseif ($quotes) { + if (!isset($color[14])) { + $color[14] = '#FF0000'; + } + $line = '' . $line . ''; } - + $body_ary[$i] = $line; } $body = '
' . implode("\n", $body_ary) . '
'; } - /* This returns a parsed string called $body. That string can then -be displayed as the actual message in the HTML. It contains -everything needed, including HTML Tags, Attachments at the -bottom, etc. -*/ + * be displayed as the actual message in the HTML. It contains + * everything needed, including HTML Tags, Attachments at the + * bottom, etc. + */ function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $mailbox='INBOX') { - // 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. + /* 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; + $show_html_default, $sort, $has_unsafe_images, $passed_ent_id; + global $languages, $squirrelmail_language; + + if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET) ) { + $view_unsafe_images = false; + } - $has_unsafe_images= 0; $body = ''; $urlmailbox = urlencode($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); + $body = mime_fetch_body ($imap_stream, $id, $ent_num); $body = decodeBody($body, $body_message->header->encoding); + + if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && + function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode')) { + if (mb_detect_encoding($body) != 'ASCII') { + $body = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode',$body); + } + } $hookResults = do_hook("message_body", $body); $body = $hookResults[1]; - // If there are other types that shouldn't be formatted, add - // them here + /* If there are other types that shouldn't be formatted, add + * them here. + */ + if ($body_message->header->type1 == 'html') { - if ( $show_html_default <> 1 ) { - $body = strip_tags( $body ); - translateText($body, $wrap_at, - $body_message->header->getParameter['charset']); + if ($show_html_default <> 1) { + $entity_conv = array(' ' => ' ', + '

' => "\n", + '

' => "\n", + '
' => "\n", + '
' => "\n", + '
' => "\n", + '
' => "\n", + '>' => '>', + '<' => '<'); + $body = strtr($body, $entity_conv); + $body = strip_tags($body); + $body = trim($body); + translateText($body, $wrap_at, + $body_message->header->getParameter('charset')); } else { - $body = magicHTML( $body, $id, $message, $mailbox ); + $body = magicHTML($body, $id, $message, $mailbox); } } else { - translateText($body, $wrap_at, - $body_message->header->getParameter('charset')); + translateText($body, $wrap_at, + $body_message->header->getParameter('charset')); } - - if ($has_unsafe_images) { - if ($view_unsafe_images) { - $body .= "

entity_id."&mailbox=$urlmailbox&sort=$sort&startMessage=$startMessage&show_more=0\">". _("Hide Unsafe Images") ."

\n"; + $link = 'passed_id=' . $id . '&ent_id='.$ent_num. + '&mailbox=' . $urlmailbox .'&sort=' . $sort . + '&startMessage=' . $startMessage . '&show_more=0'; + if (isset($passed_ent_id)) { + $link .= '&passed_ent_id='.$passed_ent_id; + } + $body .= '
' . _("Download this as a file") . ''; + if ($view_unsafe_images) { + $text = _("Hide Unsafe Images"); + } else { + if (isset($has_unsafe_images) && $has_unsafe_images) { + $link .= '&view_unsafe_images=1'; + $text = _("View Unsafe Images"); } else { - $body .= "
entity_id."&mailbox=$urlmailbox&sort=$sort&startMessage=$startMessage&show_more=0&view_unsafe_images=1\">". _("View Unsafe Images") ."

\n"; + $text = ''; } - } - } - return ($body); + } + if($text != '') { + $body .= ' | ' . $text . ''; + } + $body .= '

' . "\n"; + } + return $body; } function formatAttachments($message, $exclude_id, $mailbox, $id) { - global $where, $what; - global $startMessage, $color; + global $where, $what, $startMessage, $color; static $ShownHTML = 0; $att_ar = $message->getAttachments($exclude_id); @@ -386,231 +433,508 @@ function formatAttachments($message, $exclude_id, $mailbox, $id) { $urlMailbox = urlencode($mailbox); foreach ($att_ar as $att) { - $ent = urldecode($att->entity_id); + $ent = $att->entity_id; $header = $att->header; $type0 = strtolower($header->type0); $type1 = strtolower($header->type1); $name = ''; - $Links['download link']['text'] = _("download"); - $Links['download link']['href'] = - "../src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&ent_id=$ent"; + $links['download link']['text'] = _("Download"); + $links['download link']['href'] = SM_PATH . + "src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&ent_id=$ent"; $ImageURL = ''; if ($type0 =='message' && $type1 == 'rfc822') { - $default_page = '../src/read_body.php'; + $default_page = SM_PATH . 'src/read_body.php'; $rfc822_header = $att->rfc822_header; - $filename = decodeHeader($rfc822_header->subject); - + $filename = $rfc822_header->subject; + if (trim( $filename ) == '') { + $filename = 'untitled-[' . $ent . ']' ; + } $from_o = $rfc822_header->from; if (is_object($from_o)) { - $from_name = $from_o->getAddress(false); + $from_name = decodeHeader($from_o->getAddress(false)); } else { $from_name = _("Unknown sender"); } - $from_name = decodeHeader(htmlspecialchars($from_name)); - $description = $from_name; + $description = $from_name; } else { - $default_page = '../src/download.php'; - if (is_object($header->disposition)) { - $filename = decodeHeader($header->disposition->getProperty('filename')); - if (trim($filename) == '') { - $name = decodeHeader($header->disposition->getProperty('name')); - if (trim($name) == '') { - if ( trim( $header->id ) == '' ) + $default_page = SM_PATH . 'src/download.php'; + if (is_object($header->disposition)) { + $filename = $header->disposition->getProperty('filename'); + if (trim($filename) == '') { + $name = decodeHeader($header->disposition->getProperty('name')); + if (trim($name) == '') { + $name = $header->getParameter('name'); + if(trim($name) == '') { + if (trim( $header->id ) == '') { + $filename = 'untitled-[' . $ent . ']' ; + } else { + $filename = 'cid: ' . $header->id; + } + } else { + $filename = $name; + } + } else { + $filename = $name; + } + } + } else { + $filename = $header->getParameter('name'); + if (!trim($filename)) { + if (trim( $header->id ) == '') { $filename = 'untitled-[' . $ent . ']' ; - else + } else { $filename = 'cid: ' . $header->id; - } else { - $filename = $name; - } - } - } else { - if ( trim( $header->id ) == '' ) - $filename = 'untitled-[' . $ent . ']' ; - else - $filename = 'cid: ' . $header->id; - } - + } + } + } if ($header->description) { - $description = htmlspecialchars($header->description); + $description = decodeHeader($header->description); } else { - $description = ''; - } + $description = ''; + } } $display_filename = $filename; - if (isset($passed_ent_id)) { - $passed_ent_id_link = '&passed_ent_id='.$passed_ent_id; - } else { - $passed_ent_id_link = ''; - } - $DefaultLink = $default_page . "?startMessage=$startMessage" + if (isset($passed_ent_id)) { + $passed_ent_id_link = '&passed_ent_id='.$passed_ent_id; + } else { + $passed_ent_id_link = ''; + } + $defaultlink = $default_page . "?startMessage=$startMessage" . "&passed_id=$id&mailbox=$urlMailbox" . '&ent_id='.$ent.$passed_ent_id_link; if ($where && $what) { - $DefaultLink = '&where='. urlencode($where).'&what='.urlencode($what); + $defaultlink .= '&where='. urlencode($where).'&what='.urlencode($what); } - /* 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); + + /* This executes the attachment hook with a specific MIME-type. + * If that doesn'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]; + $links = $hookresults[1]; + $defaultlink = $hookresults[6]; - $attachments .= '' . - "$display_filename " . - '' . show_readable_size($header->size) . - '  ' . - "[ $type0/$type1 ] " . - ''; + $attachments .= '' . + ''.decodeHeader($display_filename).' ' . + '' . show_readable_size($header->size) . + '  ' . + '[ '.htmlspecialchars($type0).'/'.htmlspecialchars($type1).' ] ' . + ''; $attachments .= '' . $description . ''; - $attachments .= ' '; + $attachments .= ' '; - $SkipSpaces = 1; - foreach ($Links as $Val) { - if ($SkipSpaces) { - $SkipSpaces = 0; + $skipspaces = 1; + foreach ($links as $val) { + if ($skipspaces) { + $skipspaces = 0; } else { $attachments .= '  |  '; } - $attachments .= '' . $Val['text'] . ''; + $attachments .= '' . $val['text'] . ''; } - unset($Links); - $attachments .= "\n"; + unset($links); + $attachments .= "\n"; } + $attachmentadd = do_hook_function('attachments_bottom',$attachments); + if ($attachmentadd != '') + $attachments = $attachmentadd; return $attachments; } -/** this function decodes the body depending on the encoding type. **/ +function sqimap_base64_decode(&$string) { + + // Base64 encoded data goes in pairs of 4 bytes. To achieve on the + // fly decoding (to reduce memory usage) you have to check if the + // data has incomplete pairs + + // Remove the noise in order to check if the 4 bytes pairs are complete + $string = str_replace(array("\r\n","\n", "\r", " "),array('','','',''),$string); + + $sStringRem = ''; + $iMod = strlen($string) % 4; + if ($iMod) { + $sStringRem = substr($string,-$iMod); + // Check if $sStringRem contains padding characters + if (substr($sStringRem,-1) != '=') { + $string = substr($string,0,-$iMod); + } else { + $sStringRem = ''; + } + } + $string = base64_decode($string); + return $sStringRem; +} + + +/* This function decodes the body depending on the encoding type. */ function decodeBody($body, $encoding) { - $body = str_replace("\r\n", "\n", $body); - $encoding = strtolower($encoding); + global $show_html_default; + + $body = str_replace("\r\n", "\n", $body); + $encoding = strtolower($encoding); - global $show_html_default; + $encoding_handler = do_hook_function('decode_body', $encoding); - if ($encoding == 'quoted-printable' || - $encoding == 'quoted_printable') { - $body = quoted_printable_decode($body); - while (ereg("=\n", $body)) - $body = ereg_replace ("=\n", "", $body); + // plugins get first shot at decoding the body + // + if (!empty($encoding_handler) && function_exists($encoding_handler)) { + $body = $encoding_handler('decode', $body); - } else if ($encoding == 'base64') { - $body = base64_decode($body); - } + } else if ($encoding == 'quoted-printable' || + $encoding == 'quoted_printable') { + $body = quoted_printable_decode($body); - // All other encodings are returned raw. - return $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; } -/* +/** + * Decodes headers + * * This functions decode strings that is encoded according to * RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text). * Patched by Christian Schmidt 23/03/2002 + * + * @param string $string header string that has to be made readable + * @param boolean $utfencode change message in order to be readable on user's charset. defaults to true + * @param boolean $htmlsave preserve spaces and sanitize html special characters. defaults to true + * @param boolean $decide decide if string can be utfencoded. defaults to false + * @return string decoded header string */ -function decodeHeader ($string, $utfencode=true) { +function decodeHeader ($string, $utfencode=true,$htmlsave=true,$decide=false) { + global $languages, $squirrelmail_language,$default_charset; if (is_array($string)) { $string = implode("\n", $string); } + + if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && + function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader')) { + $string = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader', $string); + // Do we need to return at this point? + // return $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]; - } + $iLastMatch = -2; + $encoded = true; - if (ucfirst($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"))', + $aString = explode(' ',$string); + $ret = ''; + foreach ($aString as $chunk) { + if ($encoded && $chunk === '') { + continue; + } elseif ($chunk === '') { + $ret .= ' '; + continue; + } + $encoded = false; + /* if encoded words are not separated by a linear-space-white we still catch them */ + $j = $i-1; + + while ($match = preg_match('/^(.*)=\?([^?]*)\?(Q|B)\?([^?]*)\?=(.*)$/Ui',$chunk,$res)) { + /* if the last chunk isn't an encoded string then put back the space, otherwise don't */ + if ($iLastMatch !== $j) { + if ($htmlsave) { + $ret .= ' '; + } else { + $ret .= ' '; + } + } + $iLastMatch = $i; + $j = $i; + $ret .= $res[1]; + $encoding = ucfirst($res[3]); + + /* decide about valid decoding */ + if ($decide && is_conversion_safe($res[2])) { + $utfencode=true; + $can_be_encoded=true; + } else { + $can_be_encoded=false; + } + switch ($encoding) + { + case 'B': + $replace = base64_decode($res[4]); + if ($can_be_encoded) { + /* convert string to different charset, + * if functions asks for it (usually in compose) + */ + $ret .= charset_convert($res[2],$replace,$default_charset); + } else { + // convert string to html codes in order to display it + $ret .= charset_decode($res[2],$replace); + } + break; + case 'Q': + $replace = str_replace('_', ' ', $res[4]); + $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], $replace); + if ($utfencode) { + if ($can_be_encoded) { + /* convert string to different charset, + * if functions asks for it (usually in compose) + */ + $replace = charset_convert($res[2], $replace,$default_charset); + } else { + // convert string to html codes in order to display it + $replace = charset_decode($res[2], $replace); + } + } else { + if ($htmlsave) { + $replace = htmlspecialchars($replace); + } + } + $ret .= $replace; + break; + default: + break; } + $chunk = $res[5]; + $encoded = true; } - $string = $prefix . $replace . substr($string, strlen($res[0])); - $i = strlen($prefix) + strlen($replace); + if (!$encoded) { + if ($htmlsave) { + $ret .= ' '; + } else { + $ret .= ' '; + } + } + + if (!$encoded && $htmlsave) { + $ret .= htmlspecialchars($chunk); + } else { + $ret .= $chunk; + } + ++$i; } - return( $string ); + /* remove the first added space */ + if ($ret) { + if ($htmlsave) { + $ret = substr($ret,5); + } else { + $ret = substr($ret,1); + } + } + + return $ret; } -/* +/** + * Encodes header as quoted-printable + * * 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. + * + * @param string $string header string, that has to be encoded + * @return string quoted-printable encoded string */ function encodeHeader ($string) { - global $default_charset; + global $default_charset, $languages, $squirrelmail_language; + + if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && + function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader')) { + return call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader', $string); + } // Encode only if the string contains 8-bit characters or =? - $j = strlen( $string ); - $l = strstr($string, '=?'); // Must be encoded ? + $j = strlen($string); + $max_l = 75 - strlen($default_charset) - 7; + $aRet = array(); $ret = ''; - for( $i=0; $i < $j; ++$i) { - switch( $string{$i} ) { - case '=': - $ret .= '=3D'; - break; + $iEncStart = $enc_init = false; + $cur_l = $iOffset = 0; + for($i = 0; $i < $j; ++$i) { + switch($string{$i}) + { + case '=': + case '<': + case '>': + case ',': case '?': - $ret .= '=3F'; - break; case '_': - $ret .= '=5F'; - break; + if ($iEncStart === false) { + $iEncStart = $i; + } + $cur_l+=3; + if ($cur_l > ($max_l-2)) { + /* if there is an stringpart that doesn't need encoding, add it */ + $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); + $aRet[] = "=?$default_charset?Q?$ret?="; + $iOffset = $i; + $cur_l = 0; + $ret = ''; + $iEncStart = false; + } else { + $ret .= sprintf("=%02X",ord($string{$i})); + } + break; + case '(': + case ')': + if ($iEncStart !== false) { + $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); + $aRet[] = "=?$default_charset?Q?$ret?="; + $iOffset = $i; + $cur_l = 0; + $ret = ''; + $iEncStart = false; + } + break; case ' ': - $ret .= '_'; - break; + if ($iEncStart !== false) { + $cur_l++; + if ($cur_l > $max_l) { + $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); + $aRet[] = "=?$default_charset?Q?$ret?="; + $iOffset = $i; + $cur_l = 0; + $ret = ''; + $iEncStart = false; + } else { + $ret .= '_'; + } + } + break; default: - $k = ord( $string{$i} ); - if ( $k > 126 ) { - $ret .= sprintf("=%02X", $k); - $l = TRUE; - } else - $ret .= $string{$i}; + $k = ord($string{$i}); + if ($k > 126) { + if ($iEncStart === false) { + // do not start encoding in the middle of a string, also take the rest of the word. + $sLeadString = substr($string,0,$i); + $aLeadString = explode(' ',$sLeadString); + $sToBeEncoded = array_pop($aLeadString); + $iEncStart = $i - strlen($sToBeEncoded); + $ret .= $sToBeEncoded; + $cur_l += strlen($sToBeEncoded); + } + $cur_l += 3; + /* first we add the encoded string that reached it's max size */ + if ($cur_l > ($max_l-2)) { + $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); + $aRet[] = "=?$default_charset?Q?$ret?= "; /* the next part is also encoded => separate by space */ + $cur_l = 3; + $ret = ''; + $iOffset = $i; + $iEncStart = $i; + } + $enc_init = true; + $ret .= sprintf("=%02X", $k); + } else { + if ($iEncStart !== false) { + $cur_l++; + if ($cur_l > $max_l) { + $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); + $aRet[] = "=?$default_charset?Q?$ret?="; + $iEncStart = false; + $iOffset = $i; + $cur_l = 0; + $ret = ''; + } else { + $ret .= $string{$i}; + } + } + } + break; } } - if ( $l ) { - $string = "=?$default_charset?Q?$ret?="; + if ($enc_init) { + if ($iEncStart !== false) { + $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); + $aRet[] = "=?$default_charset?Q?$ret?="; + } else { + $aRet[] = substr($string,$iOffset); + } + $string = implode('',$aRet); } - - return( $string ); + 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->type0 == 'multipart') { - $ret = find_ent_id( $id, $message->entities[$i] ); +function find_ent_id($id, $message) { + for ($i = 0, $ret = ''; $ret == '' && $i < count($message->entities); $i++) { + if ($message->entities[$i]->header->type0 == 'multipart') { + $ret = find_ent_id($id, $message->entities[$i]); } else { - if ( strcasecmp( $message->entities[$i]->header->id, $id ) == 0 ) - $ret = $message->entities[$i]->entity_id; + if (strcasecmp($message->entities[$i]->header->id, $id) == 0) { +// if (sq_check_save_extension($message->entities[$i])) { + return $message->entities[$i]->entity_id; +// } + } } } - return( $ret ); + return $ret; } +function sq_check_save_extension($message) { + $filename = $message->getFilename(); + $ext = substr($filename, strrpos($filename,'.')+1); + $save_extensions = array('jpg','jpeg','gif','png','bmp'); + return in_array($ext, $save_extensions); +} + + /** ** HTMLFILTER ROUTINES */ +/** + * This function is more or less a wrapper around stripslashes. Apparently + * Explorer is stupid enough to just remove the backslashes and then + * execute the content of the attribute as if nothing happened. + * Who does that? + * + * @param attvalue The value of the attribute + * @return attvalue The value of the attribute stripslashed. + */ +function sq_unbackslash($attvalue){ + /** + * Remove any backslashes. See if there are any first. + */ + + if (strstr($attvalue, '\\') !== false){ + $attvalue = stripslashes($attvalue); + } + return $attvalue; +} + +/** + * Kill any tabs, newlines, or carriage returns. Our friends the + * makers of the browser with 95% market value decided that it'd + * be funny to make "java[tab]script" be just as good as "javascript". + * + * @param attvalue The attribute value before extraneous spaces removed. + * @return attvalue The attribute value after extraneous spaces removed. + */ +function sq_unspace($attvalue){ + if (strcspn($attvalue, "\t\r\n") != strlen($attvalue)){ + $attvalue = str_replace(Array("\t", "\r", "\n"), Array('', '', ''), + $attvalue); + } + return $attvalue; +} + /** * 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 + * of attributes, and the type of the tag. This function is called by * sq_sanitize internally. * * @param $tagname the name of the tag. @@ -619,7 +943,8 @@ function find_ent_id( $id, $message ) { * @return a string with the final tag representation. */ function sq_tagprint($tagname, $attary, $tagtype){ - $me = "sq_tagprint"; + $me = 'sq_tagprint'; + if ($tagtype == 2){ $fulltag = ''; } else { @@ -632,9 +957,9 @@ function sq_tagprint($tagname, $attary, $tagtype){ $fulltag .= ' ' . join(" ", $atts); } if ($tagtype == 3){ - $fulltag .= " /"; + $fulltag .= ' /'; } - $fulltag .= ">"; + $fulltag .= '>'; } return $fulltag; } @@ -653,7 +978,7 @@ function sq_casenormalize(&$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 $offset the offset within the string where we should start * looking for the next non-whitespace character. @@ -661,8 +986,8 @@ function sq_casenormalize(&$val){ * non-whitespace char is located. */ function sq_skipspace($body, $offset){ - $me = "sq_skipspace"; - preg_match("/^(\s*)/s", substr($body, $offset), $matches); + $me = 'sq_skipspace'; + preg_match('/^(\s*)/s', substr($body, $offset), $matches); if (sizeof($matches{1})){ $count = strlen($matches{1}); $offset += $count; @@ -682,7 +1007,7 @@ function sq_skipspace($body, $offset){ * strlen($body) if needle wasn't found. */ function sq_findnxstr($body, $offset, $needle){ - $me = "sq_findnxstr"; + $me = 'sq_findnxstr'; $pos = strpos($body, $needle, $offset); if ($pos === FALSE){ $pos = strlen($body); @@ -704,11 +1029,11 @@ function sq_findnxstr($body, $offset, $needle){ * - string with whatever it is we matched */ function sq_findnxreg($body, $offset, $reg){ - $me = "sq_findnxreg"; + $me = 'sq_findnxreg'; $matches = Array(); $retarr = Array(); - preg_match("%^(.*?)($reg)%s", substr($body, $offset), $matches); - if (!$matches{0}){ + preg_match("%^(.*?)($reg)%si", substr($body, $offset), $matches); + if (!isset($matches{0}) || !$matches{0}){ $retarr = false; } else { $retarr{0} = $offset + strlen($matches{1}); @@ -733,7 +1058,7 @@ function sq_findnxreg($body, $offset, $reg){ * first three members will be false, if the tag is invalid. */ function sq_getnxtag($body, $offset){ - $me = "sq_getnxtag"; + $me = 'sq_getnxtag'; if ($offset > strlen($body)){ return false; } @@ -757,38 +1082,38 @@ function sq_getnxtag($body, $offset){ * 2. Closing tag, e.g.: * * 3. XHTML-style content-less tag, e.g.: - * + * */ $tagtype = false; switch (substr($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); + 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 += 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; + $gt = sq_findnxstr($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 = $pos; @@ -808,41 +1133,41 @@ function sq_getnxtag($body, $offset){ * '>' indicating the end of the tag entirely. * '\s' indicating the end of the tag name. * '/' indicating that this is type-3 xhtml tag. - * + * * Whatever else we find there indicates an invalid tag. */ switch ($match){ - case "/": - /** - * This is an xhtml-style tag with a closing / at the - * end, like so: . 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 { + case '/': /** - * This is an invalid tag! Look for the next closing ">". + * This is an xhtml-style tag with a closing / at the + * end, like so: . Check if it's followed + * by the closing bracket. If not, then this tag is invalid */ - $gt = sq_findnxstr($body, $offset, ">"); - return Array(false, false, false, $lt, $gt); - } + if (substr($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)){ + /** + * This is an invalid tag! Look for the next closing ">". + */ + $gt = sq_findnxstr($body, $lt, ">"); + return Array(false, false, false, $lt, $gt); + } + break; } - + /** * At this point we're here: * @@ -896,7 +1221,7 @@ function sq_getnxtag($body, $offset){ * double quotes. Type 4 we convert into: * attrname="yes". */ - $regary = sq_findnxreg($body, $pos, "[^\w\-_]"); + $regary = sq_findnxreg($body, $pos, "[^:\w\-_]"); if ($regary == false){ /** * Looks like body ended before the end of tag. @@ -914,91 +1239,92 @@ function sq_getnxtag($body, $offset){ * anything else means the attribute is invalid. */ switch($match){ - case "/": - /** - * This is an xhtml-style tag with a closing / at the - * end, like so: . 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); + case '/': /** - * Here are 3 possibilities: - * "'" attribute type 1 - * '"' attribute type 2 - * everything else is the content of tag type 3 + * This is an xhtml-style tag with a closing / at the + * end, like so: . Check if it's followed + * by the closing bracket. If not, then this tag is invalid */ - $quot = substr($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) = $regary; + if (substr($body, $pos, 2) == "/>"){ $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 . '"'; + $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); /** - * These are hateful. Look for \s, or >. + * Here are 3 possibilities: + * "'" attribute type 1 + * '"' attribute type 2 + * everything else is the content of tag type 3 */ - $regary = sq_findnxreg($body, $pos, "[\s>]"); - if ($regary == false){ - return Array(false, false, false, $lt, strlen($body)); + $quot = substr($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} = '"' . $attval . '"'; } - list($pos, $attval, $match) = $regary; + } else if (preg_match("|[\w/>]|", $char)) { + /** + * That was attribute type 4. + */ + $attary{$attname} = '"yes"'; + } else { /** - * If it's ">" it will be caught at the top. + * An illegal character. Find next '>' and return. */ - $attval = preg_replace("/\"/s", """, $attval); - $attary{$attname} = '"' . $attval . '"'; + $gt = sq_findnxstr($body, $pos, ">"); + return Array(false, false, false, $lt, $gt); } - } 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, $gt); - } + break; } } /** @@ -1016,13 +1342,14 @@ function sq_getnxtag($body, $offset){ * @param $attvalue A string to run entity check against. * @return Translated value. */ + function sq_deent($attvalue){ - $me="sq_deent"; + $me = 'sq_deent'; /** * See if we have to run the checks first. All entities must start * with "&". */ - if (strpos($attvalue, "&") === false){ + if (strpos($attvalue, '&') === false){ return $attvalue; } /** @@ -1033,22 +1360,22 @@ function sq_deent($attvalue){ * Leave " in, as it can mess us up. */ $trans = array_flip($trans); - unset($trans{"""}); + unset($trans{'"'}); while (list($ent, $val) = each($trans)){ - $attvalue = preg_replace("/$ent*(\W)/si", "$val\\1", $attvalue); + $attvalue = preg_replace('/' . $ent . '*/si', $val, $attvalue); } /** * Now translate numbered entities from 1 to 255 if needed. */ - if (strpos($attvalue, "#") !== false){ + if (strpos($attvalue, '#') !== false){ $omit = Array(34, 39); - for ($asc=1; $asc<256; $asc++){ + for ($asc = 256; $asc >= 0; $asc--){ if (!in_array($asc, $omit)){ $chr = chr($asc); - $attvalue = preg_replace("/\�*$asc;*(\D)/si", "$chr\\1", - $attvalue); - $attvalue = preg_replace("/\�*".dechex($asc).";*(\W)/si", - "$chr\\1", $attvalue); + $octrule = '/\�*' . $asc . ';*/si'; + $hexrule = '/\�*' . dechex($asc) . ';*/si'; + $attvalue = preg_replace($octrule, $chr, $attvalue); + $attvalue = preg_replace($hexrule, $chr, $attvalue); } } } @@ -1067,16 +1394,16 @@ function sq_deent($attvalue){ * @param $id message id * @return Array with modified attributes. */ -function sq_fixatts($tagname, - $attary, +function sq_fixatts($tagname, + $attary, $rm_attnames, $bad_attvals, $add_attr_to_tag, $message, $id, - $mailbox + $mailbox ){ - $me = "sq_fixatts"; + $me = 'sq_fixatts'; while (list($attname, $attvalue) = each($attary)){ /** * See if this attribute should be removed. @@ -1092,9 +1419,17 @@ function sq_fixatts($tagname, } } /** - * Remove any entities. + * Remove any backslashes, entities, and extraneous whitespace. */ + $attvalue = sq_unbackslash($attvalue); $attvalue = sq_deent($attvalue); + $attvalue = sq_unspace($attvalue); + + /** + * Remove \r \n \t \0 " " "\\" + */ + $attvalue = str_replace(Array("\r", "\n", "\t", "\0", " ", "\\"), + Array('', '','','','',''), $attvalue); /** * Now let's run checks on the attvalues. @@ -1112,7 +1447,7 @@ function sq_fixatts($tagname, * Second one is replacements */ list($valmatch, $valrepl) = $valary; - $newvalue = + $newvalue = preg_replace($valmatch, $valrepl, $attvalue); if ($newvalue != $attvalue){ $attary{$attname} = $newvalue; @@ -1142,15 +1477,22 @@ function sq_fixatts($tagname, /** * 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 + * @param $mailbox the message mailbox * @return a string with edited content. */ -function sq_fixstyle($message, $id, $content){ +function sq_fixstyle($body, $pos, $message, $id, $mailbox){ global $view_unsafe_images; - $me = "sq_fixstyle"; + $me = 'sq_fixstyle'; + $ret = sq_findnxreg($body, $pos, ''); + if ($ret == FALSE){ + return array(FALSE, strlen($body)); + } + $newpos = $ret[0] + strlen($ret[2]); + $content = $ret[1]; /** * First look for general BODY style declaration, which would be * like so: @@ -1158,29 +1500,29 @@ function sq_fixstyle($message, $id, $content){ * and change it to .bodyclass so we can just assign it to a
*/ $content = preg_replace("|body(\s*\{.*?\})|si", ".bodyclass\\1", $content); - $secremoveimg = "../images/" . _("sec_remove_eng.png"); + $secremoveimg = '../images/' . _("sec_remove_eng.png"); /** * Fix url('blah') declarations. */ - $content = preg_replace("|url\(([\'\"])\s*\S+script\s*:.*?([\'\"])\)|si", + $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|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", + $content = preg_replace("|url\s*\(\s*([\'\"])\s*https*:.*?([\'\"])\s*\)|si", "url(\\1$secremoveimg\\2)", $content); } - + /** * Fix urls that refer to cid: */ - while (preg_match("|url\(([\'\"]\s*cid:.*?[\'\"])\)|si", $content, - $matches)){ + while (preg_match("|url\s*\(\s*([\'\"]\s*cid:.*?[\'\"])\s*\)|si", + $content, $matches)){ $cidurl = $matches{1}; - $httpurl = sq_cid2http($message, $id, $cidurl); - $content = preg_replace("|url\($cidurl\)|si", + $httpurl = sq_cid2http($message, $id, $cidurl, $mailbox); + $content = preg_replace("|url\s*\(\s*$cidurl\s*\)|si", "url($httpurl)", $content); } @@ -1188,12 +1530,13 @@ function sq_fixstyle($message, $id, $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'); + $match = Array('/expression/i', + '/behaviou*r/i', + '/binding/i', + '/include-source/i'); + $replace = Array('idiocy', 'idiocy', 'idiocy', 'idiocy'); $content = preg_replace($match, $replace, $content); - return $content; + return array($content, $newpos); } /** @@ -1203,6 +1546,7 @@ function sq_fixstyle($message, $id, $content){ * @param $message the message object * @param $id the message id * @param $cidurl the cid: url. + * @param $mailbox the message mailbox * @return a string with a http-friendly url */ function sq_cid2http($message, $id, $cidurl, $mailbox){ @@ -1210,11 +1554,21 @@ function sq_cid2http($message, $id, $cidurl, $mailbox){ * Get rid of quotes. */ $quotchar = substr($cidurl, 0, 1); - $cidurl = str_replace($quotchar, "", $cidurl); + if ($quotchar == '"' || $quotchar == "'"){ + $cidurl = str_replace($quotchar, "", $cidurl); + } else { + $quotchar = ''; + } $cidurl = substr(trim($cidurl), 4); - $httpurl = $quotchar . "../src/download.php?absolute_dl=true&" . - "passed_id=$id&mailbox=" . urlencode($mailbox) . - "&ent_id=" . find_ent_id($cidurl, $message) . $quotchar; + $linkurl = find_ent_id($cidurl, $message); + /* in case of non-save cid links $httpurl should be replaced by a sort of + unsave link image */ + $httpurl = ''; + if ($linkurl) { + $httpurl = $quotchar . SM_PATH . 'src/download.php?absolute_dl=true&' . + "passed_id=$id&mailbox=" . urlencode($mailbox) . + '&ent_id=' . $linkurl . $quotchar; + } return $httpurl; } @@ -1222,30 +1576,44 @@ function sq_cid2http($message, $id, $cidurl, $mailbox){ * This function changes the tag into a
tag since we * can't really have a body-within-body. * - * @param $attary an array of attributes and values of - * @return a modified array of attributes to be set for
+ * @param $attary an array of attributes and values of + * @param $mailbox mailbox we're currently reading (for cid2http) + * @param $message current message (for cid2http) + * @param $id current message id (for cid2http) + * @return a modified array of attributes to be set for
*/ -function sq_body2div($attary){ - $me = "sq_body2div"; - $divattary = Array("class"=>"'bodyclass'"); - $bgcolor="#ffffff"; - $text="#000000"; - $styledef=""; +function sq_body2div($attary, $mailbox, $message, $id){ + $me = 'sq_body2div'; + $divattary = Array('class' => "'bodyclass'"); + $bgcolor = '#ffffff'; + $text = '#000000'; + $has_bgc_stl = $has_txt_stl = false; + $styledef = ''; if (is_array($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; "; + case 'background': + $attvalue = sq_cid2http($message, $id, + $attvalue, $mailbox); + $styledef .= "background-image: url('$attvalue'); "; + break; + case 'bgcolor': + $has_bgc_stl = true; + $styledef .= "background-color: $attvalue; "; + break; + case 'text': + $has_txt_stl = true; + $styledef .= "color: $attvalue; "; + break; } } + // Outlook defines a white bgcolor and no text color. This can lead to + // white text on a white bg with certain themes. + if ($has_bgc_stl && !$has_txt_stl) { + $styledef .= "color: $text; "; + } if (strlen($styledef) > 0){ $divattary{"style"} = "\"$styledef\""; } @@ -1259,7 +1627,7 @@ function sq_body2div($attary){ * special description. * * Since the description is quite lengthy, see it here: - * http://www.mricon.com/html/phpfilter.html + * http://linux.duke.edu/projects/mini/htmlfilter/ * * @param $body the string with HTML you wish to filter * @param $tag_list see description above @@ -1273,8 +1641,8 @@ function sq_body2div($attary){ * @param $id message id * @return sanitized html safe to show on your pages. */ -function sq_sanitize($body, - $tag_list, +function sq_sanitize($body, + $tag_list, $rm_tags_with_content, $self_closing_tags, $force_tag_closing, @@ -1283,13 +1651,14 @@ function sq_sanitize($body, $add_attr_to_tag, $message, $id, - $mailbox + $mailbox ){ - $me = "sq_sanitize"; + $me = 'sq_sanitize'; + $rm_tags = array_shift($tag_list); /** * Normalize rm_tags and rm_tags_with_content. */ - @array_walk($rm_tags, 'sq_casenormalize'); + @array_walk($tag_list, 'sq_casenormalize'); @array_walk($rm_tags_with_content, 'sq_casenormalize'); @array_walk($self_closing_tags, 'sq_casenormalize'); /** @@ -1297,10 +1666,9 @@ function sq_sanitize($body, * false means remove these tags * true means allow these tags */ - $rm_tags = array_shift($tag_list); $curpos = 0; $open_tags = Array(); - $trusted = "\n"; + $trusted = "\n\n"; $skip_content = false; /** * Take care of netscape's stupid javascript entities like @@ -1308,22 +1676,24 @@ function sq_sanitize($body, */ $body = preg_replace("/&(\{.*?\};)/si", "&\\1", $body); - while (($curtag=sq_getnxtag($body, $curpos)) != FALSE){ + while (($curtag = sq_getnxtag($body, $curpos)) != FALSE){ list($tagname, $attary, $tagtype, $lt, $gt) = $curtag; $free_content = substr($body, $curpos, $lt-$curpos); /** * Take care of . Edit the - * content before we apply it. - */ - $free_content = sq_fixstyle($message, $id, $free_content); + if ($tagname == "style" && $tagtype == 1){ + list($free_content, $curpos) = + sq_fixstyle($body, $gt+1, $message, $id, $mailbox); + if ($free_content != FALSE){ + $trusted .= sq_tagprint($tagname, $attary, $tagtype); + $trusted .= $free_content; + $trusted .= sq_tagprint($tagname, false, 2); + } + continue; } if ($skip_content == false){ $trusted .= $free_content; - } else { } if ($tagname != FALSE){ if ($tagtype == 2){ @@ -1337,15 +1707,13 @@ function sq_sanitize($body, if ($skip_content == false){ if ($tagname == "body"){ $tagname = "div"; + } + if (isset($open_tags{$tagname}) && + $open_tags{$tagname} > 0){ + $open_tags{$tagname}--; } else { - if (isset($open_tags{$tagname}) && - $open_tags{$tagname} > 0){ - $open_tags{$tagname}--; - } else { - $tagname = false; - } + $tagname = false; } - } else { } } } else { @@ -1359,7 +1727,7 @@ function sq_sanitize($body, */ if ($tagtype == 1 && in_array($tagname, $self_closing_tags)){ - $tagtype=3; + $tagtype = 3; } /** * See if we should skip this tag and any content @@ -1369,12 +1737,20 @@ function sq_sanitize($body, in_array($tagname, $rm_tags_with_content)){ $skip_content = $tagname; } else { - if (($rm_tags == false + if (($rm_tags == false && in_array($tagname, $tag_list)) || ($rm_tags == true && !in_array($tagname, $tag_list))){ $tagname = false; } else { + /** + * Convert body into div. + */ + if ($tagname == "body"){ + $tagname = "div"; + $attary = sq_body2div($attary, $mailbox, + $message, $id); + } if ($tagtype == 1){ if (isset($open_tags{$tagname})){ $open_tags{$tagname}++; @@ -1393,25 +1769,16 @@ function sq_sanitize($body, $add_attr_to_tag, $message, $id, - $mailbox + $mailbox ); } - /** - * Convert body into div. - */ - if ($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 = $gt+1; } @@ -1436,9 +1803,9 @@ function sq_sanitize($body, * @param $id the id of the message * @return a string with html safe to display in the browser. */ -function magicHTML($body, $id, $message, $mailbox = 'INBOX'){ +function magicHTML($body, $id, $message, $mailbox = 'INBOX') { global $attachment_common_show_images, $view_unsafe_images, - $has_unsafe_images; + $has_unsafe_images; /** * Don't display attached images in HTML mode. */ @@ -1450,14 +1817,20 @@ function magicHTML($body, $id, $message, $mailbox = 'INBOX'){ "html", "head", "base", - "link" + "link", + "frame", + "iframe", + "plaintext", + "marquee" ); $rm_tags_with_content = Array( "script", "applet", "embed", - "title" + "title", + "frameset", + "xml" ); $self_closing_tags = Array( @@ -1467,15 +1840,16 @@ function magicHTML($body, $id, $message, $mailbox = 'INBOX'){ "input" ); - $force_tag_closing = false; + $force_tag_closing = true; $rm_attnames = Array( "/.*/" => Array( - "/target/si", - "/^on.*/si", - "/^dynsrc/si", - "/^data.*/si" + "/target/i", + "/^on.*/i", + "/^dynsrc/i", + "/^data.*/i", + "/^lowsrc.*/i" ) ); @@ -1486,56 +1860,60 @@ function magicHTML($body, $id, $message, $mailbox = 'INBOX'){ "/^src|background/i" => Array( Array( - "|^([\'\"])\s*\.\./.*([\'\"])|si", "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si", - "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", - "/^([\'\"])\s*about\s*:.*([\'\"])/si" + "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", + "/^([\'\"])\s*about\s*:.*([\'\"])/si" ), Array( "\\1$secremoveimg\\2", "\\1$secremoveimg\\2", - "\\1$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" + "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", + "/^([\'\"])\s*about\s*:.*([\'\"])/si" ), Array( - "\\1#\\2", - "\\1#\\2", - "\\1#\\2", - "\\1#\\2" + "\\1#\\1", + "\\1#\\1", + "\\1#\\1", + "\\1#\\1" ) ), - "/^style/si" => + "/^style/i" => 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" + "/expression/i", + "/binding/i", + "/behaviou*r/i", + "/include-source/i", + "/url\s*\(\s*([\'\"])\s*\S+script\s*:.*([\'\"])\s*\)/si", + "/url\s*\(\s*([\'\"])\s*mocha\s*:.*([\'\"])\s*\)/si", + "/url\s*\(\s*([\'\"])\s*about\s*:.*([\'\"])\s*\)/si", + "/(.*)\s*:\s*url\s*\(\s*([\'\"]*)\s*\S+script\s*:.*([\'\"]*)\s*\)/si" ), Array( "idiocy", - "idiocy", - "idiocy", - "url(\\1#\\2)", - "url(\\1#\\2)", - "url(\\1#\\2)", - "url(\\1#\\2)" + "idiocy", + "idiocy", + "idiocy", + "url(\\1#\\1)", + "url(\\1#\\1)", + "url(\\1#\\1)", + "url(\\1#\\1)", + "\\1:url(\\2#\\3)" ) ) ) ); + if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET) ) { + $view_unsafe_images = false; + } if (!$view_unsafe_images){ /** * Remove any references to http/https if view_unsafe_images set @@ -1544,18 +1922,21 @@ function magicHTML($body, $id, $message, $mailbox = 'INBOX'){ array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[0], '/^([\'\"])\s*https*:.*([\'\"])/si'); array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[1], - "\\1$secremoveimg\\2"); - array_push($bad_attvals{'/.*/'}{'/^style/si'}[0], + "\\1$secremoveimg\\1"); + array_push($bad_attvals{'/.*/'}{'/^style/i'}[0], '/url\(([\'\"])\s*https*:.*([\'\"])\)/si'); - array_push($bad_attvals{'/.*/'}{'/^style/si'}[1], - "url(\\1$secremoveimg\\2)"); + array_push($bad_attvals{'/.*/'}{'/^style/i'}[1], + "url(\\1$secremoveimg\\1)"); } $add_attr_to_tag = Array( - "/^a$/si" => Array('target'=>'"_new"') - ); - $trusted = sq_sanitize($body, - $tag_list, + "/^a$/i" => + Array('target'=>'"_new"', + 'title'=>'"'._("This external link will open in a new window").'"' + ) + ); + $trusted = sq_sanitize($body, + $tag_list, $rm_tags_with_content, $self_closing_tags, $force_tag_closing, @@ -1564,12 +1945,120 @@ function magicHTML($body, $id, $message, $mailbox = 'INBOX'){ $add_attr_to_tag, $message, $id, - $mailbox + $mailbox ); - if (preg_match("|$secremoveimg|si", $trusted)){ + if (preg_match("|$secremoveimg|i", $trusted)){ $has_unsafe_images = true; - } + } return $trusted; } -?> +/** + * function SendDownloadHeaders - send file to the browser + * + * Original Source: SM core src/download.php + * moved here to make it available to other code, and separate + * front end from back end functionality. + * + * @param string $type0 first half of mime type + * @param string $type1 second half of mime type + * @param string $filename filename to tell the browser for downloaded file + * @param boolean $force whether to force the download dialog to pop + * @param optional integer $filesize send the Content-Header and length to the browser + * @return void + */ + function SendDownloadHeaders($type0, $type1, $filename, $force, $filesize=0) { + global $languages, $squirrelmail_language; + $isIE = $isIE6 = 0; + + sqgetGlobalVar('HTTP_USER_AGENT', $HTTP_USER_AGENT, SQ_SERVER); + + if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false && + strstr($HTTP_USER_AGENT, 'Opera') === false) { + $isIE = 1; + } + + if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false && + strstr($HTTP_USER_AGENT, 'Opera') === false) { + $isIE6 = 1; + } + + if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && + function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_downloadfilename')) { + $filename = + call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_downloadfilename', $filename, $HTTP_USER_AGENT); + } else { + $filename = ereg_replace('[\\/:\*\?"<>\|;]', '_', str_replace(' ', ' ', $filename)); + } + + // A Pox on Microsoft and it's Internet Explorer! + // + // IE has lots of bugs with file downloads. + // It also has problems with SSL. Both of these cause problems + // for us in this function. + // + // See this article on Cache Control headers and SSL + // http://support.microsoft.com/default.aspx?scid=kb;en-us;323308 + // + // The best thing you can do for IE is to upgrade to the latest + // version + //set all the Cache Control Headers for IE + if ($isIE) { + $filename=urlencode($filename); + header ("Pragma: public"); + header ("Cache-Control: no-store, max-age=0, no-cache, must-revalidate"); # HTTP/1.1 + header ("Cache-Control: post-check=0, pre-check=0", false); + header ("Cache-control: private"); + + //set the inline header for IE, we'll add the attachment header later if we need it + header ("Content-Disposition: inline; filename=$filename"); + } + + if (!$force) { + // Try to show in browser window + header ("Content-Disposition: inline; filename=\"$filename\""); + header ("Content-Type: $type0/$type1; name=\"$filename\""); + } else { + // Try to pop up the "save as" box + + // IE makes this hard. It pops up 2 save boxes, or none. + // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP + // http://support.microsoft.com/default.aspx?scid=kb;EN-US;260519 + // But, according to Microsoft, it is "RFC compliant but doesn't + // take into account some deviations that allowed within the + // specification." Doesn't that mean RFC non-compliant? + // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP + + // all browsers need the application/octet-stream header for this + header ("Content-Type: application/octet-stream; name=\"$filename\""); + + // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp + // Do not have quotes around filename, but that applied to + // "attachment"... does it apply to inline too? + header ("Content-Disposition: attachment; filename=\"$filename\""); + + if ($isIE && !$isIE6) { + // This combination seems to work mostly. IE 5.5 SP 1 has + // known issues (see the Microsoft Knowledge Base) + + // This works for most types, but doesn't work with Word files + header ("Content-Type: application/download; name=\"$filename\""); + + // These are spares, just in case. :-) + //header("Content-Type: $type0/$type1; name=\"$filename\""); + //header("Content-Type: application/x-msdownload; name=\"$filename\""); + //header("Content-Type: application/octet-stream; name=\"$filename\""); + } else { + // another application/octet-stream forces download for Netscape + header ("Content-Type: application/octet-stream; name=\"$filename\""); + } + } + + //send the content-length header if the calling function provides it + if ($filesize > 0) { + header("Content-Length: $filesize"); + } + +} // end fn SendDownloadHeaders + +?> \ No newline at end of file