From b77c9d4669ec9596c8d39d0dec29c8a343aaa155 Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Fri, 05 Feb 2010 08:10:42 -0500
Subject: [PATCH] - fix

---
 program/include/main.inc |  581 +++++++++++++++++++++++++++++++++++++++++++--------------
 1 files changed, 434 insertions(+), 147 deletions(-)

diff --git a/program/include/main.inc b/program/include/main.inc
index b3d0dab..f09db8c 100644
--- a/program/include/main.inc
+++ b/program/include/main.inc
@@ -69,7 +69,7 @@
  */
 function get_sequence_name($sequence)
   {
-  // return table name if configured
+  // return sequence name if configured
   $config_key = 'db_sequence_'.$sequence;
   $opt = rcmail::get_instance()->config->get($config_key);
 
@@ -128,7 +128,9 @@
  */
 function rcmail_temp_gc()
   {
-  $tmp = unslashify($CONFIG['temp_dir']);
+  $rcmail = rcmail::get_instance();
+
+  $tmp = unslashify($rcmail->config->get('temp_dir'));
   $expire = mktime() - 172800;  // expire in 48 hours
 
   if ($dir = opendir($tmp))
@@ -168,6 +170,18 @@
 
 
 /**
+ * Catch an error and throw an exception.
+ *
+ * @param  int    Level of the error
+ * @param  string Error message
+ */ 
+function rcube_error_handler($errno, $errstr)
+  {
+  throw new ErrorException($errstr, 0, $errno);
+  }
+
+
+/**
  * Convert a string from one charset to another.
  * Uses mbstring and iconv functions if possible
  *
@@ -178,56 +192,56 @@
  */
 function rcube_charset_convert($str, $from, $to=NULL)
   {
+  static $iconv_options = null;
   static $mbstring_loaded = null;
   static $mbstring_list = null;
   static $convert_warning = false;
+  static $conv = null;
+  
+  $error = false;
 
-  $from = strtoupper($from);
-  $to = $to==NULL ? strtoupper(RCMAIL_CHARSET) : strtoupper($to);
-  $error = false; $conv = null;
-
-  # RFC1642
-  if ($from == 'UNICODE-1-1-UTF-7')
-    $from = 'UTF-7';
-  if ($to == 'UNICODE-1-1-UTF-7')
-    $to = 'UTF-7';
+  $to = empty($to) ? strtoupper(RCMAIL_CHARSET) : rcube_parse_charset($to);
+  $from = rcube_parse_charset($from);
 
   if ($from == $to || empty($str) || empty($from))
     return $str;
-    
-  $aliases = array(
-    'US-ASCII'         => 'ISO-8859-1',
-    'ANSI_X3.110-1983' => 'ISO-8859-1',
-    'ANSI_X3.4-1968'   => 'ISO-8859-1',
-    'UNKNOWN-8BIT'     => 'ISO-8859-15',
-    'X-UNKNOWN'        => 'ISO-8859-15',
-    'X-USER-DEFINED'   => 'ISO-8859-15',
-    'ISO-8859-8-I'     => 'ISO-8859-8',
-    'KS_C_5601-1987'   => 'EUC-KR',
-  );
 
   // convert charset using iconv module  
   if (function_exists('iconv') && $from != 'UTF-7' && $to != 'UTF-7') {
-    $aliases['GB2312'] = 'GB18030';
-    $_iconv = iconv(($aliases[$from] ? $aliases[$from] : $from), ($aliases[$to] ? $aliases[$to] : $to) . "//IGNORE", $str);
+    if ($iconv_options === null) {
+      // transliterate characters not available in output charset
+      $iconv_options = '//TRANSLIT';
+      if (iconv('', $iconv_options, '') === false) {
+        // iconv implementation does not support options
+        $iconv_options = '';
+      }
+    }
+    // throw an exception if iconv reports an illegal character in input
+    // it means that input string has been truncated
+    set_error_handler('rcube_error_handler', E_NOTICE);
+    try {
+      $_iconv = iconv($from, $to . $iconv_options, $str);
+    } catch (ErrorException $e) {
+      $_iconv = false;
+    }
+    restore_error_handler();
     if ($_iconv !== false) {
-        return $_iconv;
+      return $_iconv;
     }
   }
 
-  if (is_null($mbstring_loaded))
+  if ($mbstring_loaded === null)
     $mbstring_loaded = extension_loaded('mbstring');
     
   // convert charset using mbstring module
   if ($mbstring_loaded) {
-    $aliases['UTF-7'] = 'UTF7-IMAP';
     $aliases['WINDOWS-1257'] = 'ISO-8859-13';
     
-    if (is_null($mbstring_list)) {
+    if ($mbstring_list === null) {
       $mbstring_list = mb_list_encodings();
       $mbstring_list = array_map('strtoupper', $mbstring_list);
     }
-    
+
     $mb_from = $aliases[$from] ? $aliases[$from] : $from;
     $mb_to = $aliases[$to] ? $aliases[$to] : $to;
     
@@ -238,57 +252,213 @@
     }
   }
 
-  # try to convert with custom classes
-  if (class_exists('utf8'))
-    $conv = new utf8();
+  // convert charset using bundled classes/functions
+  if ($to == 'UTF-8') {
+    if ($from == 'UTF7-IMAP') {
+      if ($_str = utf7_to_utf8($str))
+        return $_str;
+    }
+    else if ($from == 'UTF-7') {
+      if ($_str = rcube_utf7_to_utf8($str))
+        return $_str;
+    }
+    else if (($from == 'ISO-8859-1') && function_exists('utf8_encode')) {
+      return utf8_encode($str);
+    }
+    else if (class_exists('utf8')) {
+      if (!$conv)
+        $conv = new utf8($from);
+      else
+        $conv->loadCharset($from);
 
-  // convert string to UTF-8
-  if ($from == 'UTF-7') {
-    if ($_str = utf7_to_utf8($str))
-      $str = $_str;
-    else
-      $error = true;
-  }
-  else if (($from == 'ISO-8859-1') && function_exists('utf8_encode')) {
-    $str = utf8_encode($str);
-  }
-  else if ($from != 'UTF-8' && $conv) {
-    $conv->loadCharset($from);
-    $str = $conv->strToUtf8($str);
-  }
-  else if ($from != 'UTF-8')
+      if($_str = $conv->strToUtf8($str))
+        return $_str;
+    }
     $error = true;
-
+  }
+  
   // encode string for output
-  if ($to == 'UTF-7') {
-    return utf8_to_utf7($str);
-  }
-  else if ($to == 'ISO-8859-1' && function_exists('utf8_decode')) {
-    return utf8_decode($str);
-  }
-  else if ($to != 'UTF-8' && $conv) {
-    $conv->loadCharset($to);
-    return $conv->utf8ToStr($str);
-  }
-  else if ($to != 'UTF-8') {
+  if ($from == 'UTF-8') {
+    // @TODO: we need a function for UTF-7 (RFC2152) conversion
+    if ($to == 'UTF7-IMAP' || $to == 'UTF-7') {
+      if ($_str = utf8_to_utf7($str))
+        return $_str;
+    }
+    else if ($to == 'ISO-8859-1' && function_exists('utf8_decode')) {
+      return utf8_decode($str);
+    }
+    else if (class_exists('utf8')) {
+      if (!$conv)
+        $conv = new utf8($to);
+      else
+        $conv->loadCharset($from);
+
+      if ($_str = $conv->strToUtf8($str))
+        return $_str;
+    }
     $error = true;
   }
   
   // report error
-  if ($error && !$convert_warning){
+  if ($error && !$convert_warning) {
     raise_error(array(
       'code' => 500,
       'type' => 'php',
       'file' => __FILE__,
-      'message' => "Could not convert string from $from to $to. Make sure iconv is installed or lib/utf8.class is available"
+      'line' => __LINE__,
+      'message' => "Could not convert string from $from to $to. Make sure iconv/mbstring is installed or lib/utf8.class is available."
       ), true, false);
     
     $convert_warning = true;
   }
   
-  // return UTF-8 string
+  // return UTF-8 or original string
   return $str;
   }
+
+
+/**
+ * Parse and validate charset name string (see #1485758).
+ * Sometimes charset string is malformed, there are also charset aliases 
+ * but we need strict names for charset conversion (specially utf8 class)
+ *
+ * @param  string  Input charset name
+ * @return The validated charset name
+ */
+function rcube_parse_charset($charset)
+  {
+  $charset = strtoupper($charset);
+
+  $charset = preg_replace(array(
+    '/^[^0-9A-Z]+/',	// e.g. _ISO-8859-JP$SIO
+    '/\$.*$/',		// e.g. _ISO-8859-JP$SIO
+    '/UNICODE-1-1-/',	// RFC1642
+    ), '', $charset);
+
+  # Aliases: some of them from HTML5 spec.
+  $aliases = array(
+    'USASCII'       => 'WINDOWS-1252',
+    'ANSIX31101983' => 'WINDOWS-1252',
+    'ANSIX341968'   => 'WINDOWS-1252',
+    'UNKNOWN8BIT'   => 'ISO-8859-15',
+    'UNKNOWN'       => 'ISO-8859-15',
+    'USERDEFINED'   => 'ISO-8859-15',
+    'KSC56011987'   => 'EUC-KR',
+    'GB2312' 	    => 'GBK',
+    'GB231280'	    => 'GBK',
+    'UNICODE'	    => 'UTF-8',
+    'UTF7IMAP'	    => 'UTF7-IMAP',
+    'TIS620'	    => 'WINDOWS-874',
+    'ISO88599'	    => 'WINDOWS-1254',
+    'ISO885911'	    => 'WINDOWS-874',
+    'MACROMAN'	    => 'MACINTOSH',
+  );
+
+  // allow a-z and 0-9 only and remove X- prefix (e.g. X-ROMAN8 => ROMAN8)
+  $str = preg_replace(array('/[^a-z0-9]/i', '/^x+/i'), '', $charset);
+
+  if (isset($aliases[$str]))
+    return $aliases[$str];
+
+  if (preg_match('/UTF(7|8|16|32)(BE|LE)*/', $str, $m))
+    return 'UTF-' . $m[1] . $m[2];
+
+  if (preg_match('/ISO8859([0-9]{0,2})/', $str, $m)) {
+    $iso = 'ISO-8859-' . ($m[1] ? $m[1] : 1);
+    # some clients sends windows-1252 text as latin1,
+    # it is safe to use windows-1252 for all latin1
+    return $iso == 'ISO-8859-1' ? 'WINDOWS-1252' : $iso;
+    }
+
+  return $charset;
+  }
+
+
+/**
+ * Converts string from standard UTF-7 (RFC 2152) to UTF-8.
+ *
+ * @param  string  Input string
+ * @return The converted string
+ */
+function rcube_utf7_to_utf8($str)
+{
+  $Index_64 = array(
+    0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
+    0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
+    0,0,0,0, 0,0,0,0, 0,0,0,1, 0,0,0,0,
+    1,1,1,1, 1,1,1,1, 1,1,0,0, 0,0,0,0,
+    0,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1,
+    1,1,1,1, 1,1,1,1, 1,1,1,0, 0,0,0,0,
+    0,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1,
+    1,1,1,1, 1,1,1,1, 1,1,1,0, 0,0,0,0,
+  );
+
+  $u7len = strlen($str);
+  $str = strval($str);
+  $res = '';
+
+  for ($i=0; $u7len > 0; $i++, $u7len--)
+  {
+    $u7 = $str[$i];
+    if ($u7 == '+')
+    {
+      $i++;
+      $u7len--;
+      $ch = '';
+
+      for (; $u7len > 0; $i++, $u7len--)
+      {
+        $u7 = $str[$i];
+
+        if (!$Index_64[ord($u7)])
+          break;
+
+	$ch .= $u7;
+      }
+
+      if ($ch == '') {
+        if ($u7 == '-')
+          $res .= '+';
+        continue;
+      }
+
+      $res .= rcube_utf16_to_utf8(base64_decode($ch));
+    }
+    else
+    {
+      $res .= $u7;
+    }
+  }
+
+  return $res;
+}
+
+/**
+ * Converts string from UTF-16 to UTF-8 (helper for utf-7 to utf-8 conversion)
+ *
+ * @param  string  Input string
+ * @return The converted string
+ */
+function rcube_utf16_to_utf8($str)
+{
+  $len = strlen($str);
+  $dec = '';
+
+  for ($i = 0; $i < $len; $i += 2) {
+    $c = ord($str[$i]) << 8 | ord($str[$i + 1]);
+    if ($c >= 0x0001 && $c <= 0x007F) {
+      $dec .= chr($c);
+    } else if ($c > 0x07FF) {
+      $dec .= chr(0xE0 | (($c >> 12) & 0x0F));
+      $dec .= chr(0x80 | (($c >>  6) & 0x3F));
+      $dec .= chr(0x80 | (($c >>  0) & 0x3F));
+    } else {
+      $dec .= chr(0xC0 | (($c >>  6) & 0x1F));
+      $dec .= chr(0x80 | (($c >>  0) & 0x3F));
+    }
+  }
+  return $dec;
+}
 
 
 /**
@@ -306,17 +476,8 @@
   static $js_rep_table = false;
   static $xml_rep_table = false;
 
-  $charset = rcmail::get_instance()->config->get('charset', RCMAIL_CHARSET);
-  $is_iso_8859_1 = false;
-  if ($charset == 'ISO-8859-1') {
-    $is_iso_8859_1 = true;
-  }
   if (!$enctype)
     $enctype = $OUTPUT->type;
-
-  // encode for plaintext
-  if ($enctype=='text')
-    return str_replace("\r\n", "\n", $mode=='remove' ? strip_tags($str) : $str);
 
   // encode for HTML output
   if ($enctype=='html')
@@ -347,9 +508,6 @@
     return $newlines ? nl2br($out) : $out;
     }
 
-  if ($enctype=='url')
-    return rawurlencode($str);
-
   // if the replace tables for XML and JS are not yet defined
   if ($js_rep_table===false)
     {
@@ -357,31 +515,31 @@
     $xml_rep_table['&'] = '&amp;';
 
     for ($c=160; $c<256; $c++)  // can be increased to support more charsets
-      {
-      $xml_rep_table[Chr($c)] = "&#$c;";
-      
-      if ($is_iso_8859_1)
-        $js_rep_table[Chr($c)] = sprintf("\\u%04x", $c);
-      }
+      $xml_rep_table[chr($c)] = "&#$c;";
 
     $xml_rep_table['"'] = '&quot;';
     $js_rep_table['"'] = '\\"';
     $js_rep_table["'"] = "\\'";
     $js_rep_table["\\"] = "\\\\";
+    // Unicode line and paragraph separators (#1486310)
+    $js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A8))] = '&#8232;';
+    $js_rep_table[chr(hexdec(E2)).chr(hexdec(80)).chr(hexdec(A9))] = '&#8233;';
     }
+
+  // encode for javascript use
+  if ($enctype=='js')
+    return preg_replace(array("/\r?\n/", "/\r/", '/<\\//'), array('\n', '\n', '<\\/'), strtr($str, $js_rep_table));
+
+  // encode for plaintext
+  if ($enctype=='text')
+    return str_replace("\r\n", "\n", $mode=='remove' ? strip_tags($str) : $str);
+
+  if ($enctype=='url')
+    return rawurlencode($str);
 
   // encode for XML
   if ($enctype=='xml')
     return strtr($str, $xml_rep_table);
-
-  // encode for javascript use
-  if ($enctype=='js')
-    {
-    if ($charset!='UTF-8')
-      $str = rcube_charset_convert($str, RCMAIL_CHARSET,$charset);
-      
-    return preg_replace(array("/\r?\n/", "/\r/", '/<\\//'), array('\n', '\n', '<\\/'), strtr($str, $js_rep_table));
-    }
 
   // no encoding given -> return original string
   return $str;
@@ -423,7 +581,7 @@
  * @return string   Field value or NULL if not available
  */
 function get_input_value($fname, $source, $allow_html=FALSE, $charset=NULL)
-  {
+{
   global $OUTPUT;
   $value = NULL;
   
@@ -440,7 +598,10 @@
     else if (isset($_COOKIE[$fname]))
       $value = $_COOKIE[$fname];
     }
-  
+
+  if (empty($value))
+    return $value;
+
   // strip single quotes if magic_quotes_sybase is enabled
   if (ini_get('magic_quotes_sybase'))
     $value = str_replace("''", "'", $value);
@@ -457,16 +618,35 @@
     return rcube_charset_convert($value, $OUTPUT->get_charset(), $charset);
   else
     return $value;
+}
+
+/**
+ * Convert array of request parameters (prefixed with _)
+ * to a regular array with non-prefixed keys.
+ *
+ * @param  int   Source to get value from (GPC)
+ * @return array Hash array with all request parameters
+ */
+function request2param($mode = RCUBE_INPUT_GPC)
+{
+  $out = array();
+  $src = $mode == RCUBE_INPUT_GET ? $_GET : ($mode == RCUBE_INPUT_POST ? $_POST : $_REQUEST);
+  foreach ($src as $key => $value) {
+    $fname = $key[0] == '_' ? substr($key, 1) : $key;
+    $out[$fname] = get_input_value($key, $mode);
   }
+  
+  return $out;
+}
 
 /**
  * Remove all non-ascii and non-word chars
- * except . and -
+ * except ., -, _
  */
-function asciiwords($str, $css_id = false)
+function asciiwords($str, $css_id = false, $replace_with = '')
 {
   $allowed = 'a-z0-9\_\-' . (!$css_id ? '\.' : '');
-  return preg_replace("/[^$allowed]/i", '', $str);
+  return preg_replace("/[^$allowed]/i", $replace_with, $str);
 }
 
 /**
@@ -519,7 +699,7 @@
     while ($table_data && ($sql_arr = $db->fetch_assoc($table_data)))
     {
       $zebra_class = $c % 2 ? 'even' : 'odd';
-      $table->add_row(array('id' => 'rcmrow' . $sql_arr[$id_col], 'class' => "contact $zebra_class"));
+      $table->add_row(array('id' => 'rcmrow' . $sql_arr[$id_col], 'class' => $zebra_class));
 
       // format each col
       foreach ($a_show_cols as $col)
@@ -533,7 +713,7 @@
     foreach ($table_data as $row_data)
     {
       $zebra_class = $c % 2 ? 'even' : 'odd';
-      $table->add_row(array('id' => 'rcmrow' . $row_data[$id_col], 'class' => "contact $zebra_class"));
+      $table->add_row(array('id' => 'rcmrow' . $row_data[$id_col], 'class' => $zebra_class));
 
       // format each col
       foreach ($a_show_cols as $col)
@@ -599,7 +779,7 @@
   $replacements = new rcube_string_replacer;
   
   // ignore the whole block if evil styles are detected
-  $stripped = preg_replace('/[^a-z\(:]/', '', rcmail_xss_entitiy_decode($source));
+  $stripped = preg_replace('/[^a-z\(:]/', '', rcmail_xss_entity_decode($source));
   if (preg_match('/expression|behavior|url\(|import/', $stripped))
     return '/* evil! */';
 
@@ -640,22 +820,22 @@
  * @param string CSS content to decode
  * @return string Decoded string
  */
-function rcmail_xss_entitiy_decode($content)
+function rcmail_xss_entity_decode($content)
 {
   $out = html_entity_decode(html_entity_decode($content));
-  $out = preg_replace_callback('/\\\([0-9a-f]{4})/i', 'rcmail_xss_entitiy_decode_callback', $out);
+  $out = preg_replace_callback('/\\\([0-9a-f]{4})/i', 'rcmail_xss_entity_decode_callback', $out);
   $out = preg_replace('#/\*.*\*/#Um', '', $out);
   return $out;
 }
 
 
 /**
- * preg_replace_callback callback for rcmail_xss_entitiy_decode_callback
+ * preg_replace_callback callback for rcmail_xss_entity_decode_callback
  *
  * @param array matches result from preg_replace_callback
  * @return string decoded entity
  */ 
-function rcmail_xss_entitiy_decode_callback($matches)
+function rcmail_xss_entity_decode_callback($matches)
 { 
   return chr(hexdec($matches[1]));
 }
@@ -756,14 +936,19 @@
   $today_limit = mktime(0, 0, 0, $now_date['mon'], $now_date['mday'], $now_date['year']);
   $week_limit = mktime(0, 0, 0, $now_date['mon'], $now_date['mday']-6, $now_date['year']);
 
-  // define date format depending on current time  
-  if ($CONFIG['prettydate'] && !$format && $timestamp > $today_limit && $timestamp < $now)
-    return sprintf('%s %s', rcube_label('today'), date($CONFIG['date_today'] ? $CONFIG['date_today'] : 'H:i', $timestamp));
-  else if ($CONFIG['prettydate'] && !$format && $timestamp > $week_limit && $timestamp < $now)
-    $format = $CONFIG['date_short'] ? $CONFIG['date_short'] : 'D H:i';
-  else if (!$format)
-    $format = $CONFIG['date_long'] ? $CONFIG['date_long'] : 'd.m.Y H:i';
+  // define date format depending on current time
+  if (!$format) {
+    if ($CONFIG['prettydate'] && $timestamp > $today_limit && $timestamp < $now)
+      return sprintf('%s %s', rcube_label('today'), date($CONFIG['date_today'] ? $CONFIG['date_today'] : 'H:i', $timestamp));
+    else if ($CONFIG['prettydate'] && $timestamp > $week_limit && $timestamp < $now)
+      $format = $CONFIG['date_short'] ? $CONFIG['date_short'] : 'D H:i';
+    else
+      $format = $CONFIG['date_long'] ? $CONFIG['date_long'] : 'd.m.Y H:i';
+    }
 
+  // strftime() format
+  if (preg_match('/%[a-z]+/i', $format))
+    return strftime($format, $timestamp);
 
   // parse format string manually in order to provide localized weekday and month names
   // an alternative would be to convert the date() format string to fit with strftime()
@@ -799,7 +984,7 @@
 
 
 /**
- * Compose a valid representaion of name and e-mail address
+ * Compose a valid representation of name and e-mail address
  *
  * @param string E-mail address
  * @param string Person name
@@ -810,10 +995,10 @@
   if ($name && $name != $email)
     {
     // Special chars as defined by RFC 822 need to in quoted string (or escaped).
-    return sprintf('%s <%s>', preg_match('/[\(\)\<\>\\\.\[\]@,;:"]/', $name) ? '"'.addcslashes($name, '"').'"' : $name, $email);
+    return sprintf('%s <%s>', preg_match('/[\(\)\<\>\\\.\[\]@,;:"]/', $name) ? '"'.addcslashes($name, '"').'"' : $name, trim($email));
     }
   else
-    return $email;
+    return trim($email);
   }
 
 
@@ -829,12 +1014,16 @@
 function console()
   {
   $args = func_get_args();
-  if (class_exists('rcmail', false))
-      rcmail::get_instance()->plugins->exec_hook('console', $args);
+
+  if (class_exists('rcmail', false)) {
+    $rcmail = rcmail::get_instance();
+    if (is_object($rcmail->plugins))
+      $rcmail->plugins->exec_hook('console', $args);
+  }
 
   $msg = array();
   foreach ($args as $arg)
-     $msg[] = !is_string($arg) ? var_export($arg, true) : $arg;
+    $msg[] = !is_string($arg) ? var_export($arg, true) : $arg;
 
   if (!($GLOBALS['CONFIG']['debug_level'] & 4))
     write_log('console', join(";\n", $msg));
@@ -858,33 +1047,50 @@
  */
 function write_log($name, $line)
   {
-  global $CONFIG;
+  global $CONFIG, $RCMAIL;
 
   if (!is_string($line))
     $line = var_export($line, true);
+ 
+  if (empty($CONFIG['log_date_format']))
+    $CONFIG['log_date_format'] = 'd-M-Y H:i:s O';
   
-  $log_entry = sprintf("[%s]: %s\n",
-                 date("d-M-Y H:i:s O", mktime()),
-                 $line);
+  $date = date($CONFIG['log_date_format']);
+  
+  // trigger logging hook
+  if (is_object($RCMAIL) && is_object($RCMAIL->plugins)) {
+    $log = $RCMAIL->plugins->exec_hook('write_log', array('name' => $name, 'date' => $date, 'line' => $line));
+    $name = $log['name'];
+    $line = $log['line'];
+    $date = $log['date'];
+    if ($log['abort'])
+      return true;
+  }
+ 
+  $log_entry = sprintf("[%s]: %s\n", $date, $line);
 
   if ($CONFIG['log_driver'] == 'syslog') {
-    if ($name == 'errors')
-      $prio = LOG_ERR;
-    else
-      $prio = LOG_INFO;
+    $prio = $name == 'errors' ? LOG_ERR : LOG_INFO;
     syslog($prio, $log_entry);
-  } else {
+    return true;
+  }
+  else {
     // log_driver == 'file' is assumed here
     if (empty($CONFIG['log_dir']))
       $CONFIG['log_dir'] = INSTALL_PATH.'logs';
 
     // try to open specific log file for writing
-    if ($fp = @fopen($CONFIG['log_dir'].'/'.$name, 'a')) {
+    $logfile = $CONFIG['log_dir'].'/'.$name;
+    if ($fp = @fopen($logfile, 'a')) {
       fwrite($fp, $log_entry);
       fflush($fp);
       fclose($fp);
+      return true;
     }
+    else
+      trigger_error("Error writing to log file $logfile; Please check permissions", E_USER_WARNING);
   }
+  return false;
 }
 
 
@@ -892,17 +1098,16 @@
  * @access private
  */
 function rcube_timer()
-  {
-  list($usec, $sec) = explode(" ", microtime());
-  return ((float)$usec + (float)$sec);
-  }
+{
+  return microtime(true);
+}
   
 
 /**
  * @access private
  */
-function rcube_print_time($timer, $label='Timer')
-  {
+function rcube_print_time($timer, $label='Timer', $dest='console')
+{
   static $print_count = 0;
   
   $print_count++;
@@ -912,8 +1117,8 @@
   if (empty($label))
     $label = 'Timer '.$print_count;
   
-  console(sprintf("%s: %0.4f sec", $label, $diff));
-  }
+  write_log($dest, sprintf("%s: %0.4f sec", $label, $diff));
+}
 
 
 /**
@@ -927,7 +1132,7 @@
   global $RCMAIL;
   static $a_mailboxes;
   
-  $attrib += array('maxlength' => 100, 'relanames' => false);
+  $attrib += array('maxlength' => 100, 'realnames' => false);
 
   // add some labels to client
   $RCMAIL->output->add_label('purgefolderconfirm', 'deletemessagesconfirm');
@@ -951,6 +1156,9 @@
     foreach ($a_folders as $folder)
       rcmail_build_folder_tree($a_mailboxes, $folder, $delimiter);
   }
+  
+  // allow plugins to alter the folder tree or to localize folder names
+  $hook = $RCMAIL->plugins->exec_hook('render_mailboxlist', array('list' => $a_mailboxes, 'delimiter' => $delimiter));
 
   if ($type=='select') {
     $select = new html_select($attrib);
@@ -959,12 +1167,12 @@
     if ($attrib['noselection'])
       $select->add(rcube_label($attrib['noselection']), '0');
     
-    rcmail_render_folder_tree_select($a_mailboxes, $mbox_name, $attrib['maxlength'], $select, $attrib['realnames']);
+    rcmail_render_folder_tree_select($hook['list'], $mbox_name, $attrib['maxlength'], $select, $attrib['realnames']);
     $out = $select->show();
   }
   else {
     $js_mailboxlist = array();
-    $out = html::tag('ul', $attrib, rcmail_render_folder_tree_html($a_mailboxes, $mbox_name, $js_mailboxlist, $attrib), html::$common_attrib);
+    $out = html::tag('ul', $attrib, rcmail_render_folder_tree_html($hook['list'], $mbox_name, $js_mailboxlist, $attrib), html::$common_attrib);
     
     $RCMAIL->output->add_gui_object('mailboxlist', $attrib['id']);
     $RCMAIL->output->set_env('mailboxes', $js_mailboxlist);
@@ -985,11 +1193,12 @@
 {
   global $RCMAIL;
   
-  $p += array('maxlength' => 100, 'relanames' => false);
+  $p += array('maxlength' => 100, 'realnames' => false);
   $a_mailboxes = array();
   
   foreach ($RCMAIL->imap->list_mailboxes() as $folder)
-    rcmail_build_folder_tree($a_mailboxes, $folder, $RCMAIL->imap->get_hierarchy_delimiter());
+    if (empty($p['exceptions']) || !in_array($folder, $p['exceptions']))
+      rcmail_build_folder_tree($a_mailboxes, $folder, $RCMAIL->imap->get_hierarchy_delimiter());
 
   $select = new html_select($p);
   
@@ -1025,7 +1234,7 @@
   if (!isset($arrFolders[$currentFolder])) {
     $arrFolders[$currentFolder] = array(
       'id' => $path,
-      'name' => rcube_charset_convert($currentFolder, 'UTF-7'),
+      'name' => rcube_charset_convert($currentFolder, 'UTF7-IMAP'),
       'virtual' => $virtual,
       'folders' => array());
   }
@@ -1071,7 +1280,7 @@
     }
 
     // make folder name safe for ids and class names
-    $folder_id = asciiwords($folder['id'], true);
+    $folder_id = asciiwords($folder['id'], true, '_');
     $classes = array('mailbox');
 
     // set special class for Sent, Drafts, Trash and Junk
@@ -1200,7 +1409,7 @@
   if ($folder_class = rcmail_folder_classname($name))
     return rcube_label($folder_class);
   else
-    return rcube_charset_convert($name, 'UTF-7');
+    return rcube_charset_convert($name, 'UTF7-IMAP');
 }
 
 
@@ -1211,18 +1420,96 @@
  */
 function rcube_html_editor($mode='')
 {
-  global $OUTPUT, $CONFIG;
+  global $RCMAIL, $CONFIG;
 
-  $lang = $tinylang = strtolower(substr($_SESSION['language'], 0, 2));
-  if (!file_exists(INSTALL_PATH . 'program/js/tiny_mce/langs/'.$tinylang.'.js'))
-    $tinylang = 'en';
+  $hook = $RCMAIL->plugins->exec_hook('hmtl_editor', array('mode' => $mode));
 
-  $OUTPUT->include_script('tiny_mce/tiny_mce.js');
-  $OUTPUT->include_script('editor.js');
-  $OUTPUT->add_script('rcmail_editor_init("$__skin_path", "'.JQ($tinylang).'", '.intval($CONFIG['enable_spellcheck']).', "'.$mode.'");');
+  if ($hook['abort'])
+    return;  
+
+  $lang = strtolower(substr($_SESSION['language'], 0, 2));
+  if (!file_exists(INSTALL_PATH . 'program/js/tiny_mce/langs/'.$lang.'.js'))
+    $lang = 'en';
+
+  $RCMAIL->output->include_script('tiny_mce/tiny_mce.js');
+  $RCMAIL->output->include_script('editor.js');
+  $RCMAIL->output->add_script('rcmail_editor_init("$__skin_path",
+    "'.JQ($lang).'", '.intval($CONFIG['enable_spellcheck']).', "'.$mode.'");');
 }
 
 
+/**
+ * Check if working in SSL mode
+ *
+ * @param integer HTTPS port number
+ * @param boolean Enables 'use_https' option checking
+ */
+function rcube_https_check($port=null, $use_https=true)
+{
+  global $RCMAIL;
+  
+  if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) != 'off')
+    return true;
+  if ($port && $_SERVER['SERVER_PORT'] == $port)
+    return true;
+  if ($use_https && $RCMAIL->config->get('use_https'))
+    return true;
+
+  return false;
+}
+
+
+/**
+ * E-mail address validation
+ */
+function check_email($email)
+{
+  // Check for invalid characters
+  if (preg_match('/[\x00-\x1F\x7F-\xFF]/', $email))
+    return false;
+
+  // Check that there's one @ symbol, and that the lengths are right
+  if (!preg_match('/^([^@]{1,64})@([^@]{1,255})$/', $email, $email_array))
+    return false;
+
+  // Check local part
+  $local_array = explode('.', $email_array[1]);
+  foreach ($local_array as $local_part)
+    if (!preg_match('/^(([A-Za-z0-9!#$%&\'*+\/=?^_`{|}~-]+)|("[^"]+"))$/', $local_part))
+      return false;
+
+  // Check domain part
+  if (preg_match('/^(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}$/', $email_array[2]) 
+      || preg_match('/^\[(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}\]$/', $email_array[2]))
+    return true; // If an IP address
+  else {
+    // If not an IP address
+    $domain_array = explode('.', $email_array[2]);
+    if (sizeof($domain_array) < 2)
+      return false; // Not enough parts to be a valid domain
+
+    foreach ($domain_array as $domain_part)
+      if (!preg_match('/^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]))$/', $domain_part))
+        return false;
+
+    if (!rcmail::get_instance()->config->get('email_dns_check'))
+      return true;
+
+    if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN' && version_compare(PHP_VERSION, '5.3.0', '<'))
+      return true;
+
+    // find MX record(s)
+    if (getmxrr($email_array[2], $mx_records))
+      return true;
+
+    // find any DNS record
+    if (checkdnsrr($email_array[2], 'ANY'))
+      return true;
+  }
+
+  return false;
+}
+
 
 /**
  * Helper class to turn relative urls into absolute ones

--
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