corrade-nucleus-nucleons
| /base/000_base/bower_components/cryptojslib/components/mode-ctr.js |
|---|
| @@ -0,0 +1,44 @@ |
| /* |
| CryptoJS v3.1.2 |
| code.google.com/p/crypto-js |
| (c) 2009-2013 by Jeff Mott. All rights reserved. |
| code.google.com/p/crypto-js/wiki/License |
| */ |
| /** |
| * Counter block mode. |
| */ |
| CryptoJS.mode.CTR = (function () { |
| var CTR = CryptoJS.lib.BlockCipherMode.extend(); |
| var Encryptor = CTR.Encryptor = CTR.extend({ |
| processBlock: function (words, offset) { |
| // Shortcuts |
| var cipher = this._cipher |
| var blockSize = cipher.blockSize; |
| var iv = this._iv; |
| var counter = this._counter; |
| // Generate keystream |
| if (iv) { |
| counter = this._counter = iv.slice(0); |
| // Remove IV for subsequent blocks |
| this._iv = undefined; |
| } |
| var keystream = counter.slice(0); |
| cipher.encryptBlock(keystream, 0); |
| // Increment counter |
| counter[blockSize - 1] = (counter[blockSize - 1] + 1) | 0 |
| // Encrypt |
| for (var i = 0; i < blockSize; i++) { |
| words[offset + i] ^= keystream[i]; |
| } |
| } |
| }); |
| CTR.Decryptor = Encryptor; |
| return CTR; |
| }()); |