\n\n" . '
'; $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') { $msg->is_mdnsent = true; } break; default: break; } } } // listEntities($msg); 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 * $message. * First, it checks to see if it is a multipart message. If it is, then it * handles that as it sees is necessary. If it is just a regular entity, * then it parses it and adds the necessary header information (by calling out * to mime_get_elements() */ function mime_fetch_body($imap_stream, $id, $ent_id=1, $fetch_size=0) { 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) { $cmd = "FETCH $id BODY[]"; } else { $cmd = "FETCH $id BODY[$ent_id]"; } if ($fetch_size!=0) $cmd .= "<0.$fetch_size>"; $data = sqimap_run_command ($imap_stream, $cmd, true, $response, $message, $uid_support); 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, $uid_support); // } } 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 '
' . '' . '' . '" . '" . '" . '" . "
' . _("Body retrieval error. The reason for this is most probably that the message is malformed.") . '
' . _("Command:") . "$cmd
' . _("Response:") . "$response
' . _("Message:") . "$message
' . _("FETCH line:") . "$topline

"; $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message, $uid_support); array_shift($data); $wholemessage = implode('', $data); $ret = $wholemessage; } return $ret; } function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding) { global $uid_support; /* Don't kill the connection if the browser is over a dialup * and it would take over 30 seconds to download it. * Donīt call set_time_limit in safe mode. */ if (!ini_get('safe_mode')) { set_time_limit(0); } /* in case of base64 encoded attachments, do not buffer them. Instead, echo the decoded attachment directly to screen */ if (strtolower($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,$uid_support,'sqimap_base64_decode','php://stdout',true); } else { $body = mime_fetch_body ($imap_stream, $id, $ent_id); echo decodeBody($body, $encoding); } return; } function sqimap_base64_decode(&$string) { // base64 enoded 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; } /* -[ END MIME DECODING ]----------------------------------------------------------- */ /* This is here for debugging purposes. It will print out a list * of all the entity IDs that are in the $message object. */ function listEntities ($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 $msg; } } } } function getPriorityStr($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; } /* returns a $message object for a particular entity id */ function getEntity ($message, $ent_id) { return $message->getEntity($ent_id); } /* 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(SM_PATH . 'functions/url_parser.php'); $body_ary = explode("\n", $body); for ($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 % 2) { if (!isset($color[13])) { $color[13] = '#800000'; } $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 $body. That string can then * be displayed as the actual message in the HTML. It contains * everything needed, including HTML Tags, Attachments at the * bottom, etc. */ function formatBody($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. */ global $startMessage, $username, $key, $imapServerAddress, $imapPort, $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; } $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); $body = decodeBody($body, $body_message->header->encoding); if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) { if (mb_detect_encoding($body) != 'ASCII') { $body = $languages[$squirrelmail_language]['XTRA_CODE']('decode', $body); } } $hookResults = do_hook("message_body", $body); $body = $hookResults[1]; /* If there are other types that shouldn't be formatted, add * them here. */ if ($body_message->header->type1 == 'html') { if ($show_html_default <> 1) { $entity_conv = array(' ' => ' ', '

' => "\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, $mailbox); } } else { translateText($body, $wrap_at, $body_message->header->getParameter('charset')); } $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 { $text = ''; } } if($text != '') { $body .= ' | ' . $text . ''; } $body .= '

' . "\n"; } return $body; } function formatAttachments($message, $exclude_id, $mailbox, $id) { global $where, $what, $startMessage, $color; static $ShownHTML = 0; $att_ar = $message->getAttachments($exclude_id); if (!count($att_ar)) return ''; $attachments = ''; $urlMailbox = urlencode($mailbox); foreach ($att_ar as $att) { $ent = $att->entity_id; $header = $att->header; $type0 = strtolower($header->type0); $type1 = strtolower($header->type1); $name = ''; $links['download link']['text'] = _("download"); $links['download link']['href'] = SM_PATH . "src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&ent_id=$ent"; $ImageURL = ''; if ($type0 =='message' && $type1 == 'rfc822') { $default_page = SM_PATH . 'src/read_body.php'; $rfc822_header = $att->rfc822_header; $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); } else { $from_name = _("Unknown sender"); } $from_name = decodeHeader(($from_name)); $description = $from_name; } else { $default_page = SM_PATH . 'src/download.php'; if (is_object($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 { $filename = 'cid: ' . $header->id; } } } if ($header->description) { $description = decodeHeader($header->description); } else { $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" . "&passed_id=$id&mailbox=$urlMailbox" . '&ent_id='.$ent.$passed_ent_id_link; if ($where && $what) { $defaultlink .= '&where='. urlencode($where).'&what='.urlencode($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]; $attachments .= '' . ''.decodeHeader($display_filename).' ' . '' . show_readable_size($header->size) . '  ' . '[ '. htmlspecialchars($type0).'/'.htmlspecialchars($type1). ' ] '. ''; $attachments .= '' . $description . ''; $attachments .= ' '; $skipspaces = 1; foreach ($links as $val) { if ($skipspaces) { $skipspaces = 0; } else { $attachments .= '  |  '; } $attachments .= '' . $val['text'] . ''; } unset($links); $attachments .= "\n"; } return $attachments; } /* This function decodes the body depending on the encoding type. */ function decodeBody($body, $encoding) { global $show_html_default; $body = str_replace("\r\n", "\n", $body); $encoding = strtolower($encoding); $encoding_handler = do_hook_function('decode_body', $encoding); // plugins get first shot at decoding the body // if (!empty($encoding_handler) && function_exists($encoding_handler)) { $body = $encoding_handler('decode', $body); } else if ($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 $body; } /* * This functions decode strings that is encoded according to * RFC1522 (MIME Part Two: Message Header Extensions for Non-ASCII Text). * Patched by Christian Schmidt 23/03/2002 */ function decodeHeader ($string, $utfencode=true,$htmlsave=true) { global $languages, $squirrelmail_language; if (is_array($string)) { $string = implode("\n", $string); } if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) { $string = $languages[$squirrelmail_language]['XTRA_CODE']('decodeheader', $string); // Do we need to return at this point? // return $string; } $i = 0; $iLastMatch = -2; $encoded = false; $aString = explode(' ',$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]); switch ($encoding) { case 'B': $replace = base64_decode($res[4]); $ret .= charset_decode($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[2], $replace); } else { if ($htmlsave) { $replace = htmlspecialchars($replace); } } $ret .= $replace; break; default: break; } $chunk = $res[5]; $encoded = true; } if (!$encoded) { if ($htmlsave) { $ret .= ' '; } else { $ret .= ' '; } } if (!$encoded && $htmlsave) { $ret .= htmlspecialchars($chunk); } else { $ret .= $chunk; } ++$i; } /* remove the first added space */ if ($ret) { if ($htmlsave) { $ret = substr($ret,5); } else { $ret = substr($ret,1); } } return $ret; } /* * Encode a string according to RFC 1522 for use in headers if it * contains 8-bit characters or anything that looks like it should * be encoded. */ function encodeHeader ($string) { global $default_charset, $languages, $squirrelmail_language; if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) { return $languages[$squirrelmail_language]['XTRA_CODE']('encodeheader', $string); } // Encode only if the string contains 8-bit characters or =? $j = strlen($string); $max_l = 75 - strlen($default_charset) - 7; $aRet = array(); $ret = ''; $iEncStart = $enc_init = false; $cur_l = $iOffset = 0; for($i = 0; $i < $j; ++$i) { switch($string{$i}) { case '=': case '<': case '>': case ',': case '?': case '_': 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 = ''; $iEncStart = false; } break; case ' ': if ($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) { 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 ($enc_init) { if ($iEncStart !== false) { $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); $aRet[] = "=?$default_charset?Q?$ret?="; } else { $aRet[] = substr($string,$iOffset); } $string = implode('',$aRet); } return $string; } /* This function trys to locate the entity_id of a specific mime element */ function find_ent_id($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, $id) == 0) { // if (sq_check_save_extension($message->entities[$i])) { return $message->entities[$i]->entity_id; // } } } } 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 checks attribute values for entity-encoded values * and returns them translated into 8-bit strings so we can run * checks on them. * * @param $attvalue A string to run entity check against. * @return Nothing, modifies a reference value. */ function sq_defang(&$attvalue){ $me = 'sq_defang'; /** * Skip this if there aren't ampersands or backslashes. */ if (strpos($attvalue, '&') === false && strpos($attvalue, '\\') === false){ return; } $m = false; do { $m = false; $m = $m || sq_deent($attvalue, '/\�*(\d+);*/s'); $m = $m || sq_deent($attvalue, '/\�*((\d|[a-f])+);*/si', true); $m = $m || sq_deent($attvalue, '/\\\\(\d+)/s', true); } while ($m == true); $attvalue = stripslashes($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 Nothing, modifies a reference value. */ function sq_unspace(&$attvalue){ $me = 'sq_unspace'; if (strcspn($attvalue, "\t\r\n\0 ") != strlen($attvalue)){ $attvalue = str_replace(Array("\t", "\r", "\n", "\0", " "), Array('', '', '', '', ''), $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 * 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 = ''; } 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)%si", substr($body, $offset), $matches); if (!isset($matches{0}) || !$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 * \---------^ */ $pos = sq_skipspace($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.: * * 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); } 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: . 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)){ /** * 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: * * \-------^ * * 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($match){ case '/': /** * This is an xhtml-style tag with a closing / at the * end, like so: . Check if it's followed * by the closing bracket. If not, then this tag is invalid */ if (substr($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); } break; } } /** * 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)); } /** * Translates entities into literal values so they can be checked. * * @param $attvalue the by-ref value to check. * @param $regex the regular expression to check against. * @param $hex whether the entites are hexadecimal. * @return True or False depending on whether there were matches. */ function sq_deent(&$attvalue, $regex, $hex=false){ $me = 'sq_deent'; $ret_match = false; preg_match_all($regex, $attvalue, $matches); if (is_array($matches) && sizeof($matches[0]) > 0){ $repl = Array(); for ($i = 0; $i < sizeof($matches[0]); $i++){ $numval = $matches[1][$i]; if ($hex){ $numval = hexdec($numval); } $repl{$matches[0][$i]} = chr($numval); } $attvalue = strtr($attvalue, $repl); return true; } else { return false; } } /** * 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, $mailbox ){ $me = 'sq_fixatts'; while (list($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{$attname}); continue; } } } } /** * Remove any backslashes, entities, and extraneous whitespace. */ sq_defang($attvalue); sq_unspace($attvalue); /** * Now let's run checks on the attvalues. * I don't expect anyone to comprehend this. If you do, * get in touch with me so I can drive to where you live and * shake your hand personally. :) */ foreach ($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, $mailbox); } } /** * See if we need to append any attributes to this tag. */ foreach ($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 * @param $mailbox the message mailbox * @return a string with edited content. */ function sq_fixstyle($body, $pos, $message, $id, $mailbox){ global $view_unsafe_images; $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: * body {background: blah-blah} * 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"); /** * Fix url('blah') declarations. */ $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*\(\s*([\'\"])\s*https*:.*?([\'\"])\s*\)|si", "url(\\1$secremoveimg\\2)", $content); } /** * Fix urls that refer to cid: */ while (preg_match("|url\s*\(\s*([\'\"]\s*cid:.*?[\'\"])\s*\)|si", $content, $matches)){ $cidurl = $matches{1}; $httpurl = sq_cid2http($message, $id, $cidurl, $mailbox); $content = preg_replace("|url\s*\(\s*$cidurl\s*\)|si", "url($httpurl)", $content); } /** * Fix stupid css declarations which lead to vulnerabilities * in IE. */ $match = Array('/expression/i', '/behaviou*r/i', '/binding/i', '/include-source/i'); $replace = Array('idiocy', 'idiocy', 'idiocy', 'idiocy'); $content = preg_replace($match, $replace, $content); return array($content, $newpos); } /** * 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. * @param $mailbox the message mailbox * @return a string with a http-friendly url */ function sq_cid2http($message, $id, $cidurl, $mailbox){ /** * Get rid of quotes. */ $quotchar = substr($cidurl, 0, 1); if ($quotchar == '"' || $quotchar == "'"){ $cidurl = str_replace($quotchar, "", $cidurl); } else { $quotchar = ''; } $cidurl = substr(trim($cidurl), 4); $linkurl = find_ent_id($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; } /** * 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 * @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, $mailbox, $message, $id){ $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': $attvalue = sq_cid2http($message, $id, $attvalue, $mailbox); $styledef .= "background-image: url('$attvalue'); "; break; case 'bgcolor': $styledef .= "background-color: $attvalue; "; break; case 'text': $styledef .= "color: $attvalue; "; break; } } if (strlen($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, $mailbox ){ $me = 'sq_sanitize'; $rm_tags = array_shift($tag_list); /** * Normalize rm_tags and rm_tags_with_content. */ @array_walk($tag_list, 'sq_casenormalize'); @array_walk($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 */ $curpos = 0; $open_tags = Array(); $trusted = "\n\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