intl/uconv/tests/unit/test_bug381412.js

   1 const charset = "Shift_JIS";
   2
   3 function error(inString, outString, msg){
   4     var dispIn = "";
   5     var dispOut = "";
   6     var i;
   7     for (i = 0; i < inString.length; ++i) {
   8         dispIn += " x" + inString.charCodeAt(i).toString(16);
   9     }
  10     if (outString.length == 0) {
  11         dispOut = "<empty>";
  12     } else {
  13         for (i = 0; i < outString.length; ++i) {
  14             dispOut += " x" + outString.charCodeAt(i).toString(16);
  15         }
  16     }
  17     dump("\"" + dispIn + "\" ==> \"" + dispOut + "\"\n");
  18     do_throw("security risk: " + msg);
  19 }
  20
  21 function run_test() {
  22     var ScriptableUnicodeConverter =
  23         Components.Constructor("@mozilla.org/intl/scriptableunicodeconverter",
  24                                "nsIScriptableUnicodeConverter");
  25
  26     var converter = new ScriptableUnicodeConverter();
  27     converter.charset = charset;
  28
  29     var leadByte, trailByte;
  30     var inString;
  31     for (leadByte = 1; leadByte < 0x100; ++leadByte) {
  32         for (trailByte = 1; trailByte < 0x100; ++trailByte) {
  33             inString = String.fromCharCode(leadByte, trailByte, 65);
  34             var outString = converter.ConvertToUnicode(inString) + converter.Finish();
  35             switch (outString.length) {
  36                 case 1:
  37                     error(inString, outString, "2 byte sequence eaten");
  38                     break;
  39                 case 2:
  40                     if (outString.charCodeAt(0) < 0x80 &&
  41                         outString.charCodeAt(1) < 0x80) {
  42                         error(inString, outString, "2 byte sequence converted to 1 ASCII");
  43                     }
  44                     break;
  45                 case 3:
  46                     if (outString != inString &&
  47                         outString.charCodeAt(0) < 0x80 &&
  48                         outString.charCodeAt(1) < 0x80) {
  49                         error(inString, outString,
  50                               "2 byte sequence converted to 2 ASCII");
  51                     }
  52                     break;
  53             }
  54         }
  55     }
  56 }