Merge pull request #252 from corbosman/uufix

Aleksander Machniak

2014-12-23 fa5dabb5747f12fd63a5a0d2b7a7e49de714afa4

 program/lib/Roundcube/rcube_message.php

@@ -195,8 +195,6 @@
    /**
     * Determine if the message contains a HTML part. This must to be
     * a real part not an attachment (or its part)
     * This must to be
     * a real part not an attachment (or its part)
     *
     * @param bool $enriched Enables checking for text/enriched parts too
     *
@@ -213,15 +211,19 @@
                }

                $level = explode('.', $part->mime_id);
                $depth = count($level);

                // Check if the part belongs to higher-level's alternative/related
                // Check if the part belongs to higher-level's multipart part
                // this can be alternative/related/signed/encrypted or mixed
                while (array_pop($level) !== null) {
                    if (!count($level)) {
                    $parent_depth = count($level);
                    if (!$parent_depth) {
                        return true;
                    }

                    $parent = $this->mime_parts[join('.', $level)];
                    if ($parent->mimetype != 'multipart/alternative' && $parent->mimetype != 'multipart/related') {
                    if (!preg_match('/^multipart\/(alternative|related|signed|encrypted|mixed)$/', $parent->mimetype)
                        || ($parent->mimetype == 'multipart/mixed' && $parent_depth < $depth - 1)) {
                        continue 2;
                    }
                }
@@ -435,17 +437,24 @@
                    continue;
                }

                // We've encountered (malformed) messages with more than
                // one text/plain or text/html part here. There's no way to choose
                // which one is better, so we'll display first of them and add
                // others as attachments (#1489358)

                // check if sub part is
                if ($is_multipart)
                    $related_part = $p;
                else if ($sub_mimetype == 'text/plain')
                else if ($sub_mimetype == 'text/plain' && !$plain_part)
                    $plain_part = $p;
                else if ($sub_mimetype == 'text/html')
                else if ($sub_mimetype == 'text/html' && !$html_part)
                    $html_part = $p;
                else if ($sub_mimetype == 'text/enriched')
                else if ($sub_mimetype == 'text/enriched' && !$enriched_part)
                    $enriched_part = $p;
                else
                    $attach_part = $p;
                else {
                    // add unsupported/unrecognized parts to attachments list
                    $this->attachments[] = $sub_part;
                }
            }

            // parse related part (alternative part could be in here)
@@ -486,11 +495,6 @@

                $this->parts[] = $c;
            }

            // add unsupported/unrecognized parts to attachments list
            if ($attach_part) {
                $this->attachments[] = $structure->parts[$attach_part];
            }
        }
        // this is an ecrypted message -> create a plaintext body with the according message
        else if ($mimetype == 'multipart/encrypted') {
@@ -528,8 +532,9 @@
                    $part_mimetype = $mail_part->real_mimetype;
                    list($primary_type, $secondary_type) = explode('/', $part_mimetype);
                }
                else
                    $part_mimetype = $mail_part->mimetype;
                else {
                    $part_mimetype = $part_orig_mimetype = $mail_part->mimetype;
                  }

                // multipart/alternative
                if ($primary_type == 'multipart') {
@@ -760,28 +765,43 @@
        }

        $parts = array();
        // FIXME: line length is max.65?
        $uu_regexp = '/begin [0-7]{3,4} ([^\n]+)\n/s';
        
        // uuencode regexp
        $uu_regexp = '/^(begin [0-7]{3,4} ([^\n]+)\n)(([\x21-\x60]{0,65}\n){0,2})([\x21-\x60]{0,65}|`\nend)\s*\n/sm';

        if (preg_match_all($uu_regexp, $part->body, $matches, PREG_SET_ORDER)) {
            // update message content-type
            $part->ctype_primary   = 'multipart';
            $part->ctype_secondary = 'mixed';
            $part->mimetype        = $part->ctype_primary . '/' . $part->ctype_secondary;
            $uu_endstring = "`\nend\n";

            // add attachments to the structure
            foreach ($matches as $pid => $att) {
                $startpos = strpos($part->body, $att[1]) + strlen($att[1]) + 1; // "\n"
                $endpos = strpos($part->body, $uu_endstring);
                // make sure we're looking at a uuencoded file, and not a false positive
                $uu_lines = explode("\n", $att[3]);
                foreach ($uu_lines as $uu_line) {
                    if ( strlen($uu_line) == 0 ) {
                        continue;
                    }
                    $line_len = (ord(substr($uu_line, 0, 1)) - 32) & 0x3F;
                    $max_code_len = floor( ($line_len+2)/3 ) * 4;
                    $min_code_len = ceil( $line_len/3 * 4);
                    if ( strlen($uu_line)-1 < $min_code_len
                         or strlen($uu_line)-1 > $max_code_len )
                    {
                        // illegal uuencode, break out of 'foreach $matches' loop
                        break 2;
                    }
                }

                $startpos = strpos($part->body, $att[0]) + strlen($att[1]);
                $endpos   = strpos($part->body, $uu_endstring);
                $filebody = substr($part->body, $startpos, $endpos-$startpos);

                // remove attachments bodies from the message body
                $part->body = substr_replace($part->body, "", $startpos, $endpos+strlen($uu_endstring)-$startpos);

                $uu_startpos = $startpos - strlen($att[1]);
                $part->body = substr_replace($part->body, "", $uu_startpos, $endpos+strlen($uu_endstring)-$uu_startpos);
                
                $uupart = new rcube_message_part;

                $uupart->filename = trim($att[1]);
                $uupart->filename = trim($att[2]);
                $uupart->encoding = 'stream';
                $uupart->body     = convert_uudecode($filebody);
                $uupart->size     = strlen($uupart->body);
@@ -795,8 +815,8 @@
                unset($matches[$pid]);
            }

            // remove attachments bodies from the message body
            $part->body = preg_replace($uu_regexp, '', $part->body);
            // mark body as modified so it will not be cached by rcube_imap_cache
            $part->body_modified = true;
        }

        return $parts;