From a7e552b5a436375e233e7d4df4ed6cfc9e58d435 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Thu, 06 Aug 2015 13:52:01 -0400
Subject: [PATCH] Get rid of Mail_mimeDecode package dependency (#1490416)

---
 program/lib/Roundcube/rcube_mime.php |  168 +++++++++++++++++++++++++++-----------------------------
 1 files changed, 81 insertions(+), 87 deletions(-)

diff --git a/program/lib/Roundcube/rcube_mime.php b/program/lib/Roundcube/rcube_mime.php
index 5258af5..7e86de6 100644
--- a/program/lib/Roundcube/rcube_mime.php
+++ b/program/lib/Roundcube/rcube_mime.php
@@ -63,60 +63,24 @@
      * Parse the given raw message source and return a structure
      * of rcube_message_part objects.
      *
-     * It makes use of the PEAR:Mail_mimeDecode library
+     * It makes use of the rcube_mime_decode library
      *
-     * @param string  The message source
+     * @param string $raw_body The message source
+     *
      * @return object rcube_message_part The message structure
      */
     public static function parse_message($raw_body)
     {
-        $mime = new Mail_mimeDecode($raw_body);
-        $struct = $mime->decode(array('include_bodies' => true, 'decode_bodies' => true));
-        return self::structure_part($struct);
-    }
+        $conf = array(
+            'include_bodies'  => true,
+            'decode_bodies'   => true,
+            'decode_headers'  => false,
+            'default_charset' => self::get_charset(),
+        );
 
+        $mime = new rcube_mime_decode($conf);
 
-    /**
-     * Recursive method to convert a Mail_mimeDecode part into a rcube_message_part object
-     *
-     * @param object  A message part struct
-     * @param int     Part count
-     * @param string  Parent MIME ID
-     *
-     * @return object rcube_message_part
-     */
-    private static function structure_part($part, $count=0, $parent='')
-    {
-        $struct = new rcube_message_part;
-        $struct->mime_id = $part->mime_id ? $part->mime_id : (empty($parent) ? (string)$count : "$parent.$count");
-        $struct->headers = $part->headers;
-        $struct->ctype_primary = $part->ctype_primary;
-        $struct->ctype_secondary = $part->ctype_secondary;
-        $struct->mimetype = $part->ctype_primary . '/' . $part->ctype_secondary;
-        $struct->ctype_parameters = $part->ctype_parameters;
-
-        if ($part->headers['content-transfer-encoding'])
-            $struct->encoding = $part->headers['content-transfer-encoding'];
-        if ($part->ctype_parameters['charset'])
-            $struct->charset = $part->ctype_parameters['charset'];
-
-        $part_charset = $struct->charset ? $struct->charset : self::get_charset();
-
-        // determine filename
-        if (($filename = $part->d_parameters['filename']) || ($filename = $part->ctype_parameters['name'])) {
-            $struct->filename = rcube_mime::decode_mime_string($filename, $part_charset);
-        }
-
-        // copy part body and convert it to UTF-8 if necessary
-        $struct->body = $part->ctype_primary == 'text' || !$part->ctype_parameters['charset'] ? rcube_charset::convert($part->body, $part_charset) : $part->body;
-        $struct->size = strlen($part->body);
-        $struct->disposition = $part->disposition;
-
-        foreach ((array)$part->parts as $child_part) {
-            $struct->parts[] = self::structure_part($child_part, ++$count, $struct->mime_id);
-        }
-
-        return $struct;
+        return $mime->decode($raw_body);
     }
 
 
@@ -366,6 +330,9 @@
                 $address = 'MAILER-DAEMON';
                 $name    = substr($val, 0, -strlen($m[1]));
             }
+            else if (preg_match('/('.$email_rx.')/', $val, $m)) {
+                $name = $m[1];
+            }
             else {
                 $name = $val;
             }
@@ -378,14 +345,20 @@
                 }
                 if ($decode) {
                     $name = self::decode_header($name, $fallback);
+                    // some clients encode addressee name with quotes around it
+                    if ($name[0] == '"' && $name[strlen($name)-1] == '"') {
+                        $name = substr($name, 1, -1);
+                    }
                 }
             }
 
             if (!$address && $name) {
                 $address = $name;
+                $name    = '';
             }
 
             if ($address) {
+                $address      = self::fix_email($address);
                 $result[$key] = array('name' => $name, 'address' => $address);
             }
         }
@@ -514,7 +487,7 @@
                     // remove space-stuffing
                     $line = preg_replace('/^\s/', '', $line);
 
-                    if (isset($text[$last]) && $line
+                    if (isset($text[$last]) && $line && !$q_level
                         && $text[$last] != '-- '
                         && $text[$last][strlen($text[$last])-1] == ' '
                     ) {
@@ -587,23 +560,20 @@
      */
     public static function wordwrap($string, $width=75, $break="\n", $cut=false, $charset=null, $wrap_quoted=true)
     {
-        if (!$charset) {
-            $charset = RCUBE_CHARSET;
-        }
+        // Note: Never try to use iconv instead of mbstring functions here
+        //       Iconv's substr/strlen are 100x slower (#1489113)
 
-        // detect available functions
-        $strlen_func  = function_exists('iconv_strlen') ? 'iconv_strlen' : 'mb_strlen';
-        $strpos_func  = function_exists('iconv_strpos') ? 'iconv_strpos' : 'mb_strpos';
-        $strrpos_func = function_exists('iconv_strrpos') ? 'iconv_strrpos' : 'mb_strrpos';
-        $substr_func  = function_exists('iconv_substr') ? 'iconv_substr' : 'mb_substr';
+        if ($charset && $charset != RCUBE_CHARSET && function_exists('mb_internal_encoding')) {
+            mb_internal_encoding($charset);
+        }
 
         // Convert \r\n to \n, this is our line-separator
         $string       = str_replace("\r\n", "\n", $string);
         $separator    = "\n"; // must be 1 character length
         $result       = array();
 
-        while (($stringLength = $strlen_func($string, $charset)) > 0) {
-            $breakPos = $strpos_func($string, $separator, 0, $charset);
+        while (($stringLength = mb_strlen($string)) > 0) {
+            $breakPos = mb_strpos($string, $separator, 0);
 
             // quoted line (do not wrap)
             if ($wrap_quoted && $string[0] == '>') {
@@ -612,7 +582,7 @@
                     $cutLength = null;
                 }
                 else {
-                    $subString = $substr_func($string, 0, $breakPos, $charset);
+                    $subString = mb_substr($string, 0, $breakPos);
                     $cutLength = $breakPos + 1;
                 }
             }
@@ -623,59 +593,54 @@
                     $cutLength = null;
                 }
                 else {
-                    $subString = $substr_func($string, 0, $breakPos, $charset);
+                    $subString = mb_substr($string, 0, $breakPos);
                     $cutLength = $breakPos + 1;
                 }
             }
             else {
-                $subString = $substr_func($string, 0, $width, $charset);
+                $subString = mb_substr($string, 0, $width);
 
                 // last line
                 if ($breakPos === false && $subString === $string) {
                     $cutLength = null;
                 }
                 else {
-                    $nextChar = $substr_func($string, $width, 1, $charset);
+                    $nextChar = mb_substr($string, $width, 1);
 
                     if ($nextChar === ' ' || $nextChar === $separator) {
-                        $afterNextChar = $substr_func($string, $width + 1, 1, $charset);
+                        $afterNextChar = mb_substr($string, $width + 1, 1);
 
-                        if ($afterNextChar === false) {
+                        // Note: mb_substr() does never return False
+                        if ($afterNextChar === false || $afterNextChar === '') {
                             $subString .= $nextChar;
                         }
 
-                        $cutLength = $strlen_func($subString, $charset) + 1;
+                        $cutLength = mb_strlen($subString) + 1;
                     }
                     else {
-                        if ($strrpos_func[0] == 'm') {
-                            $spacePos = $strrpos_func($subString, ' ', 0, $charset);
-                        }
-                        else {
-                            $spacePos = $strrpos_func($subString, ' ', $charset);
-                        }
+                        $spacePos = mb_strrpos($subString, ' ', 0);
 
                         if ($spacePos !== false) {
-                            $subString = $substr_func($subString, 0, $spacePos, $charset);
+                            $subString = mb_substr($subString, 0, $spacePos);
                             $cutLength = $spacePos + 1;
                         }
-                        else if ($cut === false && $breakPos === false) {
-                            $subString = $string;
-                            $cutLength = null;
-                        }
                         else if ($cut === false) {
-                            $spacePos = $strpos_func($string, ' ', 0, $charset);
+                            $spacePos = mb_strpos($string, ' ', 0);
 
-                            if ($spacePos !== false && $spacePos < $breakPos) {
-                                $subString = $substr_func($string, 0, $spacePos, $charset);
+                            if ($spacePos !== false && ($breakPos === false || $spacePos < $breakPos)) {
+                                $subString = mb_substr($string, 0, $spacePos);
                                 $cutLength = $spacePos + 1;
                             }
+                            else if ($breakPos === false) {
+                                $subString = $string;
+                                $cutLength = null;
+                            }
                             else {
-                                $subString = $substr_func($string, 0, $breakPos, $charset);
+                                $subString = mb_substr($string, 0, $breakPos);
                                 $cutLength = $breakPos + 1;
                             }
                         }
                         else {
-                            $subString = $substr_func($subString, 0, $width, $charset);
                             $cutLength = $width;
                         }
                     }
@@ -685,11 +650,15 @@
             $result[] = $subString;
 
             if ($cutLength !== null) {
-                $string = $substr_func($string, $cutLength, ($stringLength - $cutLength), $charset);
+                $string = mb_substr($string, $cutLength, ($stringLength - $cutLength));
             }
             else {
                 break;
             }
+        }
+
+        if ($charset && $charset != RCUBE_CHARSET && function_exists('mb_internal_encoding')) {
+            mb_internal_encoding(RCUBE_CHARSET);
         }
 
         return implode($break, $result);
@@ -712,12 +681,20 @@
      */
     public static function file_content_type($path, $name, $failover = 'application/octet-stream', $is_stream = false, $skip_suffix = false)
     {
+        static $mime_ext = array();
+
         $mime_type = null;
-        $mime_magic = rcube::get_instance()->config->get('mime_magic');
-        $mime_ext = $skip_suffix ? null : @include(RCUBE_CONFIG_DIR . '/mimetypes.php');
+        $config = rcube::get_instance()->config;
+        $mime_magic = $config->get('mime_magic');
+
+        if (!$skip_suffix && empty($mime_ext)) {
+            foreach ($config->resolve_paths('mimetypes.php') as $fpath) {
+                $mime_ext = array_merge($mime_ext, (array) @include($fpath));
+            }
+        }
 
         // use file name suffix with hard-coded mime-type map
-        if (is_array($mime_ext) && $name) {
+        if (!$skip_suffix && is_array($mime_ext) && $name) {
             if ($suffix = substr($name, strrpos($name, '.')+1)) {
                 $mime_type = $mime_ext[strtolower($suffix)];
             }
@@ -806,7 +783,7 @@
         }
 
         $mime_types = $mime_extensions = array();
-        $regex = "/([\w\+\-\.\/]+)\t+([\w\s]+)/i"; 
+        $regex = "/([\w\+\-\.\/]+)\s+([\w\s]+)/i";
         foreach((array)$lines as $line) {
              // skip comments or mime types w/o any extensions
             if ($line[0] == '#' || !preg_match($regex, $line, $matches))
@@ -822,7 +799,9 @@
 
         // fallback to some well-known types most important for daily emails
         if (empty($mime_types)) {
-            $mime_extensions = (array) @include(RCUBE_CONFIG_DIR . '/mimetypes.php');
+            foreach (rcube::get_instance()->config->resolve_paths('mimetypes.php') as $fpath) {
+                $mime_extensions = array_merge($mime_extensions, (array) @include($fpath));
+            }
 
             foreach ($mime_extensions as $ext => $mime) {
                 $mime_types[$mime][] = $ext;
@@ -875,4 +854,19 @@
         return 'image/' . $type;
     }
 
+    /**
+     * Try to fix invalid email addresses
+     */
+    public static function fix_email($email)
+    {
+        $parts = rcube_utils::explode_quoted_string('@', $email);
+        foreach ($parts as $idx => $part) {
+            // remove redundant quoting (#1490040)
+            if ($part[0] == '"' && preg_match('/^"([a-zA-Z0-9._+=-]+)"$/', $part, $m)) {
+                $parts[$idx] = $m[1];
+            }
+        }
+
+        return implode('@', $parts);
+    }
 }

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