Issue 4465 - Move rsa module from adblockpluschrome

lib/rsa.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /**
  * This is a specialized RSA library meant only to verify SHA1-based signatures.
  */
 
 let {BigInteger} = require("jsbn");
 let Rusha = require("rusha");
 
 let rusha = new Rusha();
-
 
 // Define ASN.1 templates for the data structures used
 function seq()
 {
   return {type: 0x30, children: Array.prototype.slice.call(arguments)};
 }
 function obj(id)
 {
   return {type: 0x06, content: id};
 }
@@ skipping 146 matching lines @@
     var expected = new BigInteger(rusha.digest(data), 16);
     return (sha1.compareTo(expected) == 0);
   }
   catch (e)
   {
     console.log("Invalid encrypted signature: " + e);
     return false;
   }
 }
 exports.verifySignature = verifySignature;