Fix handling of escaped separator in vCard file (#1488896)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix handling of escaped separator in vCard file (#1488896)
 - Fix #countcontrols issue in IE<=8 when text is very long (#1488890)
 - Add option to use envelope From address for MDN responses (#1488880)
 - Add possibility to search in message body only (#1488770)

program/lib/Roundcube/rcube_vcard.php

@@ -770,15 +770,21 @@ class rcube_vcard
      */
     private static function vcard_unquote($s, $sep = ';')
     {
-        // break string into parts separated by $sep, but leave escaped $sep alone
-        if (count($parts = explode($sep, strtr($s, array("\\$sep" => "\007")))) > 1) {
-            foreach($parts as $s) {
-                $result[] = self::vcard_unquote(strtr($s, array("\007" => "\\$sep")), $sep);
+        // break string into parts separated by $sep
+        if (!empty($sep)) {
+            // Handle properly backslash escaping (#1488896)
+            $rep1 = array("\\\\" => "\010", "\\$sep" => "\007");
+            $rep2 = array("\007" => "\\$sep", "\010" => "\\\\");
+
+            if (count($parts = explode($sep, strtr($s, $rep1))) > 1) {
+                foreach ($parts as $s) {
+                    $result[] = self::vcard_unquote(strtr($s, $rep2));
+                }
+                return $result;
             }
-            return $result;
         }
 
-        return strtr($s, array("\r" => '', '\\\\' => '\\', '\n' => "\n", '\N' => "\n", '\,' => ',', '\;' => ';', '\:' => ':'));
+        return strtr($s, array("\r" => '', '\\\\' => '\\', '\n' => "\n", '\N' => "\n", '\,' => ',', '\;' => ';'));
     }
 
     /**

tests/Framework/VCard.php

@@ -55,12 +55,14 @@ class Framework_VCard extends PHPUnit_Framework_TestCase
      */
     function test_parse_four()
     {
-        $vcard = "BEGIN:VCARD\nVERSION:3.0\nN:last\\;;first\\\\;middle;;\nFN:test\nEND:VCARD";
+        $vcard = "BEGIN:VCARD\nVERSION:3.0\nN:last\\;;first\\\\;middle\\\\\\;\\\\;prefix;\nFN:test\nEND:VCARD";
         $vcard = new rcube_vcard($vcard, null);
+        $vcard = $vcard->get_assoc();
 
-        $this->assertEquals("last;", $vcard->surname, "Decode backslash character");
-        $this->assertEquals("first\\", $vcard->firstname, "Decode backslash character");
-        $this->assertEquals("middle", $vcard->middlename, "Decode backslash character");
+        $this->assertEquals("last;", $vcard['surname'], "Decode backslash character");
+        $this->assertEquals("first\\", $vcard['firstname'], "Decode backslash character");
+        $this->assertEquals("middle\\;\\", $vcard['middlename'], "Decode backslash character");
+        $this->assertEquals("prefix", $vcard['prefix'], "Decode backslash character");
     }
 
     function test_import()