corrade-nucleus-nucleons – Blame information for rev 2

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2 office 1 /*
2 CryptoJS v3.1.2
3 code.google.com/p/crypto-js
4 (c) 2009-2013 by Jeff Mott. All rights reserved.
5 code.google.com/p/crypto-js/wiki/License
6 */
7 (function () {
8 // Shortcuts
9 var C = CryptoJS;
10 var C_lib = C.lib;
11 var StreamCipher = C_lib.StreamCipher;
12 var C_algo = C.algo;
13  
14 // Reusable objects
15 var S = [];
16 var C_ = [];
17 var G = [];
18  
19 /**
20 * Rabbit stream cipher algorithm
21 */
22 var Rabbit = C_algo.Rabbit = StreamCipher.extend({
23 _doReset: function () {
24 // Shortcuts
25 var K = this._key.words;
26 var iv = this.cfg.iv;
27  
28 // Swap endian
29 for (var i = 0; i < 4; i++) {
30 K[i] = (((K[i] << 8) | (K[i] >>> 24)) & 0x00ff00ff) |
31 (((K[i] << 24) | (K[i] >>> 8)) & 0xff00ff00);
32 }
33  
34 // Generate initial state values
35 var X = this._X = [
36 K[0], (K[3] << 16) | (K[2] >>> 16),
37 K[1], (K[0] << 16) | (K[3] >>> 16),
38 K[2], (K[1] << 16) | (K[0] >>> 16),
39 K[3], (K[2] << 16) | (K[1] >>> 16)
40 ];
41  
42 // Generate initial counter values
43 var C = this._C = [
44 (K[2] << 16) | (K[2] >>> 16), (K[0] & 0xffff0000) | (K[1] & 0x0000ffff),
45 (K[3] << 16) | (K[3] >>> 16), (K[1] & 0xffff0000) | (K[2] & 0x0000ffff),
46 (K[0] << 16) | (K[0] >>> 16), (K[2] & 0xffff0000) | (K[3] & 0x0000ffff),
47 (K[1] << 16) | (K[1] >>> 16), (K[3] & 0xffff0000) | (K[0] & 0x0000ffff)
48 ];
49  
50 // Carry bit
51 this._b = 0;
52  
53 // Iterate the system four times
54 for (var i = 0; i < 4; i++) {
55 nextState.call(this);
56 }
57  
58 // Modify the counters
59 for (var i = 0; i < 8; i++) {
60 C[i] ^= X[(i + 4) & 7];
61 }
62  
63 // IV setup
64 if (iv) {
65 // Shortcuts
66 var IV = iv.words;
67 var IV_0 = IV[0];
68 var IV_1 = IV[1];
69  
70 // Generate four subvectors
71 var i0 = (((IV_0 << 8) | (IV_0 >>> 24)) & 0x00ff00ff) | (((IV_0 << 24) | (IV_0 >>> 8)) & 0xff00ff00);
72 var i2 = (((IV_1 << 8) | (IV_1 >>> 24)) & 0x00ff00ff) | (((IV_1 << 24) | (IV_1 >>> 8)) & 0xff00ff00);
73 var i1 = (i0 >>> 16) | (i2 & 0xffff0000);
74 var i3 = (i2 << 16) | (i0 & 0x0000ffff);
75  
76 // Modify counter values
77 C[0] ^= i0;
78 C[1] ^= i1;
79 C[2] ^= i2;
80 C[3] ^= i3;
81 C[4] ^= i0;
82 C[5] ^= i1;
83 C[6] ^= i2;
84 C[7] ^= i3;
85  
86 // Iterate the system four times
87 for (var i = 0; i < 4; i++) {
88 nextState.call(this);
89 }
90 }
91 },
92  
93 _doProcessBlock: function (M, offset) {
94 // Shortcut
95 var X = this._X;
96  
97 // Iterate the system
98 nextState.call(this);
99  
100 // Generate four keystream words
101 S[0] = X[0] ^ (X[5] >>> 16) ^ (X[3] << 16);
102 S[1] = X[2] ^ (X[7] >>> 16) ^ (X[5] << 16);
103 S[2] = X[4] ^ (X[1] >>> 16) ^ (X[7] << 16);
104 S[3] = X[6] ^ (X[3] >>> 16) ^ (X[1] << 16);
105  
106 for (var i = 0; i < 4; i++) {
107 // Swap endian
108 S[i] = (((S[i] << 8) | (S[i] >>> 24)) & 0x00ff00ff) |
109 (((S[i] << 24) | (S[i] >>> 8)) & 0xff00ff00);
110  
111 // Encrypt
112 M[offset + i] ^= S[i];
113 }
114 },
115  
116 blockSize: 128/32,
117  
118 ivSize: 64/32
119 });
120  
121 function nextState() {
122 // Shortcuts
123 var X = this._X;
124 var C = this._C;
125  
126 // Save old counter values
127 for (var i = 0; i < 8; i++) {
128 C_[i] = C[i];
129 }
130  
131 // Calculate new counter values
132 C[0] = (C[0] + 0x4d34d34d + this._b) | 0;
133 C[1] = (C[1] + 0xd34d34d3 + ((C[0] >>> 0) < (C_[0] >>> 0) ? 1 : 0)) | 0;
134 C[2] = (C[2] + 0x34d34d34 + ((C[1] >>> 0) < (C_[1] >>> 0) ? 1 : 0)) | 0;
135 C[3] = (C[3] + 0x4d34d34d + ((C[2] >>> 0) < (C_[2] >>> 0) ? 1 : 0)) | 0;
136 C[4] = (C[4] + 0xd34d34d3 + ((C[3] >>> 0) < (C_[3] >>> 0) ? 1 : 0)) | 0;
137 C[5] = (C[5] + 0x34d34d34 + ((C[4] >>> 0) < (C_[4] >>> 0) ? 1 : 0)) | 0;
138 C[6] = (C[6] + 0x4d34d34d + ((C[5] >>> 0) < (C_[5] >>> 0) ? 1 : 0)) | 0;
139 C[7] = (C[7] + 0xd34d34d3 + ((C[6] >>> 0) < (C_[6] >>> 0) ? 1 : 0)) | 0;
140 this._b = (C[7] >>> 0) < (C_[7] >>> 0) ? 1 : 0;
141  
142 // Calculate the g-values
143 for (var i = 0; i < 8; i++) {
144 var gx = X[i] + C[i];
145  
146 // Construct high and low argument for squaring
147 var ga = gx & 0xffff;
148 var gb = gx >>> 16;
149  
150 // Calculate high and low result of squaring
151 var gh = ((((ga * ga) >>> 17) + ga * gb) >>> 15) + gb * gb;
152 var gl = (((gx & 0xffff0000) * gx) | 0) + (((gx & 0x0000ffff) * gx) | 0);
153  
154 // High XOR low
155 G[i] = gh ^ gl;
156 }
157  
158 // Calculate new state values
159 X[0] = (G[0] + ((G[7] << 16) | (G[7] >>> 16)) + ((G[6] << 16) | (G[6] >>> 16))) | 0;
160 X[1] = (G[1] + ((G[0] << 8) | (G[0] >>> 24)) + G[7]) | 0;
161 X[2] = (G[2] + ((G[1] << 16) | (G[1] >>> 16)) + ((G[0] << 16) | (G[0] >>> 16))) | 0;
162 X[3] = (G[3] + ((G[2] << 8) | (G[2] >>> 24)) + G[1]) | 0;
163 X[4] = (G[4] + ((G[3] << 16) | (G[3] >>> 16)) + ((G[2] << 16) | (G[2] >>> 16))) | 0;
164 X[5] = (G[5] + ((G[4] << 8) | (G[4] >>> 24)) + G[3]) | 0;
165 X[6] = (G[6] + ((G[5] << 16) | (G[5] >>> 16)) + ((G[4] << 16) | (G[4] >>> 16))) | 0;
166 X[7] = (G[7] + ((G[6] << 8) | (G[6] >>> 24)) + G[5]) | 0;
167 }
168  
169 /**
170 * Shortcut functions to the cipher's object interface.
171 *
172 * @example
173 *
174 * var ciphertext = CryptoJS.Rabbit.encrypt(message, key, cfg);
175 * var plaintext = CryptoJS.Rabbit.decrypt(ciphertext, key, cfg);
176 */
177 C.Rabbit = StreamCipher._createHelper(Rabbit);
178 }());