corrade-nucleus-nucleons – Blame information for rev
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2 | office | 1 | /* |
2 | CryptoJS v3.1.2 |
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3 | code.google.com/p/crypto-js |
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4 | (c) 2009-2013 by Jeff Mott. All rights reserved. |
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5 | code.google.com/p/crypto-js/wiki/License |
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6 | */ |
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7 | /** |
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8 | * Counter block mode. |
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9 | */ |
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10 | CryptoJS.mode.CTR = (function () { |
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11 | var CTR = CryptoJS.lib.BlockCipherMode.extend(); |
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12 | |||
13 | var Encryptor = CTR.Encryptor = CTR.extend({ |
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14 | processBlock: function (words, offset) { |
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15 | // Shortcuts |
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16 | var cipher = this._cipher |
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17 | var blockSize = cipher.blockSize; |
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18 | var iv = this._iv; |
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19 | var counter = this._counter; |
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20 | |||
21 | // Generate keystream |
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22 | if (iv) { |
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23 | counter = this._counter = iv.slice(0); |
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24 | |||
25 | // Remove IV for subsequent blocks |
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26 | this._iv = undefined; |
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27 | } |
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28 | var keystream = counter.slice(0); |
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29 | cipher.encryptBlock(keystream, 0); |
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30 | |||
31 | // Increment counter |
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32 | counter[blockSize - 1] = (counter[blockSize - 1] + 1) | 0 |
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33 | |||
34 | // Encrypt |
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35 | for (var i = 0; i < blockSize; i++) { |
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36 | words[offset + i] ^= keystream[i]; |
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37 | } |
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38 | } |
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39 | }); |
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40 | |||
41 | CTR.Decryptor = Encryptor; |
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42 | |||
43 | return CTR; |
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44 | }()); |