signaturevalidator.js

// Input 0
/*
 Copyright 2012, 2013, 2014, 2015 by Vladyslav Volovyk. All Rights Reserved. */
function _base64ToArrayBuffer(base64) {
  var binary_string = window.atob(base64);
  var len = binary_string.length;
  var bytes = new Uint8Array(len);
  for(var i = 0;i < len;i++) {
    bytes[i] = binary_string.charCodeAt(i)
  }
  return bytes
}
function strToUTF8Arr(sDOMStr) {
  var aBytes, nChr, nStrLen = sDOMStr.length, nArrLen = 0;
  for(var nMapIdx = 0;nMapIdx < nStrLen;nMapIdx++) {
    nChr = sDOMStr.charCodeAt(nMapIdx);
    nArrLen += nChr < 128 ? 1 : nChr < 2048 ? 2 : nChr < 65536 ? 3 : nChr < 2097152 ? 4 : nChr < 67108864 ? 5 : 6
  }
  aBytes = new Uint8Array(nArrLen);
  for(var nIdx = 0, nChrIdx = 0;nIdx < nArrLen;nChrIdx++) {
    nChr = sDOMStr.charCodeAt(nChrIdx);
    if(nChr < 128) {
      aBytes[nIdx++] = nChr
    }else {
      if(nChr < 2048) {
        aBytes[nIdx++] = 192 + (nChr >>> 6);
        aBytes[nIdx++] = 128 + (nChr & 63)
      }else {
        if(nChr < 65536) {
          aBytes[nIdx++] = 224 + (nChr >>> 12);
          aBytes[nIdx++] = 128 + (nChr >>> 6 & 63);
          aBytes[nIdx++] = 128 + (nChr & 63)
        }else {
          if(nChr < 2097152) {
            aBytes[nIdx++] = 240 + (nChr >>> 18);
            aBytes[nIdx++] = 128 + (nChr >>> 12 & 63);
            aBytes[nIdx++] = 128 + (nChr >>> 6 & 63);
            aBytes[nIdx++] = 128 + (nChr & 63)
          }else {
            if(nChr < 67108864) {
              aBytes[nIdx++] = 248 + (nChr >>> 24);
              aBytes[nIdx++] = 128 + (nChr >>> 18 & 63);
              aBytes[nIdx++] = 128 + (nChr >>> 12 & 63);
              aBytes[nIdx++] = 128 + (nChr >>> 6 & 63);
              aBytes[nIdx++] = 128 + (nChr & 63)
            }else {
              aBytes[nIdx++] = 252 + (nChr >>> 30);
              aBytes[nIdx++] = 128 + (nChr >>> 24 & 63);
              aBytes[nIdx++] = 128 + (nChr >>> 18 & 63);
              aBytes[nIdx++] = 128 + (nChr >>> 12 & 63);
              aBytes[nIdx++] = 128 + (nChr >>> 6 & 63);
              aBytes[nIdx++] = 128 + (nChr & 63)
            }
          }
        }
      }
    }
  }
  return aBytes
}
var SignatureValidator = {keyData:{"kty":"RSA", "alg":"RS512", "use":"sig", "n":"4PyVoda4xUp2Yslx9pe3-hhOn_pr-QPyIVgJ3cKPDd6ZUgmax1pD9kEEbAfaNGcc1aFg399jDaPN_2j_ITy0kxe8q5XUlT680q5BJYV8XBFKQfKIYUcusG7MzCECjKrOOkC--aWK2JIYQWWDukS44hvxXTO78h82QE0uBDGY-qM", "e":"AQAB"}, isMessageSignatureValid_promise:function(message, signature_base64) {
  return this._importKey_promise().then(this._verify_promise.bind(this, message, signature_base64)).catch(function(err) {
    alert("Something went wrong verifying the License Key:\n\n" + err.message + "\n" + err.stack)
  })
}, _verify_promise:function(message, signature_base64, key) {
  var signature = _base64ToArrayBuffer(signature_base64);
  var plaintext = strToUTF8Arr(message);
  return window.crypto.subtle.verify({name:"RSASSA-PKCS1-v1_5", hash:{name:"SHA-512"}}, key, signature, plaintext)
}, _importKey_promise:function() {
  return window.crypto.subtle.importKey("jwk", this.keyData, {name:"RSASSA-PKCS1-v1_5", hash:{name:"SHA-512"}}, true, ["verify"])
}};