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| /*!
| * Crypto-JS v1.1.0
| * http://code.google.com/p/crypto-js/
| * Copyright (c) 2009, Jeff Mott. All rights reserved.
| * http://code.google.com/p/crypto-js/wiki/License
| */
| (function(){
|
| // Public API
| Crypto.mode.OFB = {
| encrypt: OFB,
| decrypt: OFB
| };
|
| // The mode function
| function OFB(cipher, m, iv) {
|
| var blockSizeInBytes = cipher._blocksize * 4,
| keystream = iv.slice(0);
|
| // Encrypt each byte
| for (var i = 0; i < m.length; i++) {
|
| // Generate keystream
| if (i % blockSizeInBytes == 0)
| cipher._encryptblock(keystream, 0);
|
| // Encrypt byte
| m[i] ^= keystream[i % blockSizeInBytes];
|
| }
|
| }
|
| })();
|
|
