spritzjs/example/browser.html

A Spritz stream-cipher implementation in JavaScript

<script src="../facade-high-level.js"></script>
<script src="../spritzjs.js"></script>
<script>

  (function setUp() {

    //  window.facadeHighLevel only exposes the high-level API
    //  hash, encrypt/decrypt, encryptWithIV/decryptWithIV
    //  it also enforces the guards refactored out from spritzjs v0.3
    window.facadeHighLevel = window.facadeHighLevel;

    //  spritzjs module is now a constructor, with optional facade
    //  if no facade is provided then all spritzjs functions are exposed
    window.spritzjs = window.spritzjs(window.facadeHighLevel);

  }());

  (function hashExample(){
    var M = [65, 66, 67];             // "ABC" as a byte array
    var r = 32;                       // 32 byte hash desired
    var hashed = spritzjs.hash(M, r); // "hashed" now contains 32 bytes of hashed "M" material

    console.log(hashed.length);       // -> 32
    console.log(hashed);              // -> [2, 143, 162,..., 71]
  }());


  (function encryptDecryptExample(){
    var K = [115, 101, 116, 101, 99, 45, 97, 115, 116, 114, 111, 110, 111, 109, 121];
    var M = [84, 104, 97, 110, 107, 32, 121, 111, 117, 32, 102, 111, 114, 32, 100, 101, 99, 111, 100, 105, 110, 103, 32, 116, 104, 105, 115, 32, 112, 108, 97, 105, 110, 116, 101, 120, 116, 32, 97, 116, 32, 108, 101, 97, 115, 116, 44, 32, 73, 32, 104, 111, 112, 101, 32, 121, 111, 117, 32, 119, 105, 108, 108, 32, 116, 114, 121, 32, 115, 112, 114, 105, 116, 122, 106, 115, 33];

    var encrypted = spritzjs.encrypt(K, M);

    console.log(encrypted.length === M.length);   // -> true
    console.log(encrypted);                       // -> [27, 217, 247,..., 165]

    var decrypted = spritzjs.decrypt(K, encrypted);

    for (var i = 0; i < decrypted.length; i++) {
      if (M[i] !== decrypted[i]) throw new Error("I shouldn't be thrown");
    }
  }());
</script>