From cb9fc852cf39d91dfa1dc915073914fd153e774a Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Wed, 23 Sep 2009 13:25:05 -0400
Subject: [PATCH] - Fix regular expression for e-mail address (#1486152)

---
 program/include/rcube_vcard.php |  107 ++++++++++++++++++++++++++++++++++++++++-------------
 1 files changed, 81 insertions(+), 26 deletions(-)

diff --git a/program/include/rcube_vcard.php b/program/include/rcube_vcard.php
index 3ad47a5..7dbbb3f 100644
--- a/program/include/rcube_vcard.php
+++ b/program/include/rcube_vcard.php
@@ -5,7 +5,7 @@
  | program/include/rcube_vcard.php                                       |
  |                                                                       |
  | This file is part of the RoundCube Webmail client                     |
- | Copyright (C) 2008, RoundCube Dev. - Switzerland                      |
+ | Copyright (C) 2008-2009, RoundCube Dev. - Switzerland                 |
  | Licensed under the GNU GPL                                            |
  |                                                                       |
  | PURPOSE:                                                              |
@@ -73,7 +73,7 @@
     $this->business = ($this->raw['X-ABShowAs'][0] == 'COMPANY') || (join('', (array)$this->raw['N'][0]) == '' && !empty($this->organization));
     
     foreach ((array)$this->raw['EMAIL'] as $i => $raw_email)
-      $this->email[$i] = $raw_email[0];
+      $this->email[$i] = is_array($raw_email) ? $raw_email[0] : $raw_email;
     
     // make the pref e-mail address the first entry in $this->email
     $pref_index = $this->get_type_index('EMAIL', 'pref');
@@ -172,6 +172,7 @@
     $encoding = self::detect_encoding($data);
     if ($encoding && $encoding != RCMAIL_CHARSET) {
       $data = rcube_charset_convert($data, $encoding);
+      $data = preg_replace(array('/^[\xFE\xFF]{2}/', '/^\xEF\xBB\xBF/', '/^\x00+/'), '', $data); // also remove BOM
     }
 
     $vcard_block = '';
@@ -217,15 +218,22 @@
     $vcard = preg_replace(array('/^item\d*\.X-AB.*$/m', '/^item\d*\./m', "/\n+/"), array('', '', "\n"), $vcard);
 
     // remove vcard 2.1 charset definitions
-    $vcard = preg_replace('/;CHARSET=[^:]+/', '', $vcard);
+    $vcard = preg_replace('/;CHARSET=[^:;]+/', '', $vcard);
+    
+    // if N doesn't have any semicolons, add some 
+    $vcard = preg_replace('/^(N:[^;\R]*)$/m', '\1;;;;', $vcard);
 
     return $vcard;
   }
 
+  private static function rfc2425_fold_callback($matches)
+  {
+    return ":\n  ".rtrim(chunk_split($matches[1], 72, "\n  "));
+  }
 
   private static function rfc2425_fold($val)
   {
-    return preg_replace('/:([^\n]{72,})/e', '":\n  ".rtrim(chunk_split("\\1", 72, "\n  "))', $val) . "\n";
+    return preg_replace_callback('/:([^\n]{72,})/', array('self', 'rfc2425_fold_callback'), $val) . "\n";
   }
 
 
@@ -241,31 +249,47 @@
     // Perform RFC2425 line unfolding
     $vcard = preg_replace(array("/\r/", "/\n\s+/"), '', $vcard);
     
+    $lines = preg_split('/\r?\n/', $vcard);
     $data = array();
-    if (preg_match_all('/^([^\\:]*):(.+)$/m', $vcard, $regs, PREG_SET_ORDER)) {
-      foreach($regs as $line) {
-        // convert 2.1-style "EMAIL;internet;home:" to 3.0-style "EMAIL;TYPE=internet,home:"
-        if(($data['VERSION'][0] == "2.1") && preg_match('/^([^;]+);([^:]+)/', $line[1], $regs2) && !preg_match('/^TYPE=/i', $regs2[2])) {
-          $line[1] = $regs2[1] . ";TYPE=" . strtr($regs2[2], array(";" => ","));
-        }
+    
+    for ($i=0; $i < count($lines); $i++) {
+      if (!preg_match('/^([^\\:]*):(.+)$/', $lines[$i], $line))
+          continue;
 
-        if (!preg_match('/^(BEGIN|END)$/', $line[1]) && preg_match_all('/([^\\;]+);?/', $line[1], $regs2)) {
-          $entry = array(self::vcard_unquote($line[2]));
-
-          foreach($regs2[1] as $attrid => $attr) {
-            if ((list($key, $value) = explode('=', $attr)) && $value)
-              $entry[strtolower($key)] = array_merge((array)$entry[strtolower($key)], (array)self::vcard_unquote($value, ','));
-            elseif ($attrid > 0)
-              $entry[$key] = true;  # true means attr without =value
-          }
-
-          $data[$regs2[1][0]][] = count($entry) > 1 ? $entry : $entry[0];
-        }
+      // convert 2.1-style "EMAIL;internet;home:" to 3.0-style "EMAIL;TYPE=internet;TYPE=home:"
+      if (($data['VERSION'][0] == "2.1") && preg_match('/^([^;]+);([^:]+)/', $line[1], $regs2) && !preg_match('/^TYPE=/i', $regs2[2])) {
+        $line[1] = $regs2[1];
+        foreach (explode(';', $regs2[2]) as $prop)
+          $line[1] .= ';' . (strpos($prop, '=') ? $prop : 'TYPE='.$prop);
       }
 
-      unset($data['VERSION']);
+      if (!preg_match('/^(BEGIN|END)$/i', $line[1]) && preg_match_all('/([^\\;]+);?/', $line[1], $regs2)) {
+        $entry = array();
+        $field = strtoupper($regs2[1][0]);
+
+        foreach($regs2[1] as $attrid => $attr) {
+          if ((list($key, $value) = explode('=', $attr)) && $value) {
+            if ($key == 'ENCODING') {
+              // add next line(s) to value string if QP line end detected
+              while ($value == 'QUOTED-PRINTABLE' && preg_match('/=$/', $lines[$i]))
+                  $line[2] .= "\n" . $lines[++$i];
+              
+              $line[2] = self::decode_value($line[2], $value);
+            }
+            else
+              $entry[strtolower($key)] = array_merge((array)$entry[strtolower($key)], (array)self::vcard_unquote($value, ','));
+          }
+          else if ($attrid > 0) {
+            $entry[$key] = true;  // true means attr without =value
+          }
+        }
+
+        $entry = array_merge($entry, (array)self::vcard_unquote($line[2]));
+        $data[$field][] = count($entry) > 1 ? $entry : $entry[0];
+      }
     }
 
+    unset($data['VERSION']);
     return $data;
   }
 
@@ -293,6 +317,28 @@
 
 
   /**
+   * Decode a given string with the encoding rule from ENCODING attributes
+   *
+   * @param string String to decode
+   * @param string Encoding type (quoted-printable and base64 supported)
+   * @return string Decoded 8bit value
+   */
+  private static function decode_value($value, $encoding)
+  {
+    switch (strtolower($encoding)) {
+      case 'quoted-printable':
+        return quoted_printable_decode($value);
+
+      case 'base64':
+        return base64_decode($value);
+
+      default:
+        return $value;
+    }
+  }
+
+
+  /**
    * Encodes an entry for storage in our database (vcard 3.0 format, unfolded)
    *
    * @param array Raw data structure to encode
@@ -302,7 +348,7 @@
   {
     foreach((array)$data as $type => $entries) {
       /* valid N has 5 properties */
-      while ($type == "N" && count($entries[0]) < 5)
+      while ($type == "N" && is_array($entries[0]) && count($entries[0]) < 5)
         $entries[0][] = "";
 
       foreach((array)$entries as $entry) {
@@ -313,7 +359,7 @@
             if (is_int($attrname))
               $value[] = $attrvalues;
             elseif ($attrvalues === true)
-              $attr .= ";$attrname";    # true means just tag, not tag=value, as in PHOTO;BASE64:...
+              $attr .= ";$attrname";    // true means just tag, not tag=value, as in PHOTO;BASE64:...
             else {
               foreach((array)$attrvalues as $attrvalue)
                 $attr .= ";$attrname=" . self::vcard_quote($attrvalue, ',');
@@ -367,6 +413,15 @@
     if (substr($string, 0, 2) == "\xFF\xFE")     return 'UTF-16LE';  // Little Endian
     if (substr($string, 0, 3) == "\xEF\xBB\xBF") return 'UTF-8';
 
+    // use mb_detect_encoding()
+    $encodings = array('UTF-8', 'ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3',
+      'ISO-8859-4', 'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8', 'ISO-8859-9',
+      'ISO-8859-10', 'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'ISO-8859-16',
+      'WINDOWS-1252', 'WINDOWS-1251', 'BIG5', 'GB2312');
+
+    if (function_exists('mb_detect_encoding') && ($enc = mb_detect_encoding($string, $encodings)))
+      return $enc;
+
     // No match, check for UTF-8
     // from http://w3.org/International/questions/qa-forms-utf-8.html
     if (preg_match('/\A(
@@ -381,7 +436,7 @@
         )*\z/xs', substr($string, 0, 2048)))
       return 'UTF-8';
 
-    return null;
+    return rcmail::get_instance()->config->get('default_charset', 'ISO-8859-1'); # fallback to Latin-1
   }
 
 }

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