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path: root/frontend/beta/js/Clipperz/Crypto/SHA.js
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1/*
2
3Copyright 2008-2011 Clipperz Srl
4
5This file is part of Clipperz's Javascript Crypto Library.
6Javascript Crypto Library provides web developers with an extensive
7and efficient set of cryptographic functions. The library aims to
8obtain maximum execution speed while preserving modularity and
9reusability.
10For further information about its features and functionalities please
11refer to http://www.clipperz.com
12
13* Javascript Crypto Library is free software: you can redistribute
14 it and/or modify it under the terms of the GNU Affero General Public
15 License as published by the Free Software Foundation, either version
16 3 of the License, or (at your option) any later version.
17
18* Javascript Crypto Library is distributed in the hope that it will
19 be useful, but WITHOUT ANY WARRANTY; without even the implied
20 warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
21 See the GNU Affero General Public License for more details.
22
23* You should have received a copy of the GNU Affero General Public
24 License along with Javascript Crypto Library. If not, see
25 <http://www.gnu.org/licenses/>.
26
27*/
28
29try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) {
30 throw "Clipperz.Crypto.PRNG depends on Clipperz.ByteArray!";
31}
32
33if (typeof(Clipperz.Crypto) == 'undefined') { Clipperz.Crypto = {}; }
34if (typeof(Clipperz.Crypto.SHA) == 'undefined') { Clipperz.Crypto.SHA = {}; }
35
36Clipperz.Crypto.SHA.VERSION = "0.3";
37Clipperz.Crypto.SHA.NAME = "Clipperz.Crypto.SHA";
38
39MochiKit.Base.update(Clipperz.Crypto.SHA, {
40
41 '__repr__': function () {
42 return "[" + this.NAME + " " + this.VERSION + "]";
43 },
44
45 'toString': function () {
46 return this.__repr__();
47 },
48
49 //-----------------------------------------------------------------------------
50
51 'rotateRight': function(aValue, aNumberOfBits) {
52//Clipperz.Profile.start("Clipperz.Crypto.SHA.rotateRight");
53 var result;
54
55 result = (aValue >>> aNumberOfBits) | (aValue << (32 - aNumberOfBits));
56
57//Clipperz.Profile.stop("Clipperz.Crypto.SHA.rotateRight");
58 return result;
59 },
60
61 'shiftRight': function(aValue, aNumberOfBits) {
62//Clipperz.Profile.start("Clipperz.Crypto.SHA.shiftRight");
63 var result;
64
65 result = aValue >>> aNumberOfBits;
66
67//Clipperz.Profile.stop("Clipperz.Crypto.SHA.shiftRight");
68 return result;
69 },
70
71 //-----------------------------------------------------------------------------
72
73 'safeAdd': function() {
74//Clipperz.Profile.start("Clipperz.Crypto.SHA.safeAdd");
75 varresult;
76 vari, c;
77
78 result = arguments[0];
79 c = arguments.length;
80 for (i=1; i<c; i++) {
81 varlowerBytesSum;
82
83 lowerBytesSum = (result & 0xffff) + (arguments[i] & 0xffff);
84 result = (((result >> 16) + (arguments[i] >> 16) + (lowerBytesSum >> 16)) << 16) | (lowerBytesSum & 0xffff);
85 }
86
87//Clipperz.Profile.stop("Clipperz.Crypto.SHA.safeAdd");
88 return result;
89 },
90
91 //-----------------------------------------------------------------------------
92
93 'sha256_array': function(aValue) {
94//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha256_array");
95 varresult;
96 varmessage;
97 var h0, h1, h2, h3, h4, h5, h6, h7;
98 vark;
99 varmessageLength;
100 varmessageLengthInBits;
101 var_i, _c;
102 var charBits;
103 var rotateRight;
104 var shiftRight;
105 var safeAdd;
106 varbytesPerBlock;
107 var currentMessageIndex;
108
109 bytesPerBlock = 512/8;
110 rotateRight = Clipperz.Crypto.SHA.rotateRight;
111 shiftRight = Clipperz.Crypto.SHA.shiftRight;
112 safeAdd = Clipperz.Crypto.SHA.safeAdd;
113
114 charBits = 8;
115
116 h0 = 0x6a09e667;
117 h1 = 0xbb67ae85;
118 h2 = 0x3c6ef372;
119 h3 = 0xa54ff53a;
120 h4 = 0x510e527f;
121 h5 = 0x9b05688c;
122 h6 = 0x1f83d9ab;
123 h7 = 0x5be0cd19;
124
125 k = [0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
126 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
127 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
128 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
129 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
130 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
131 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
132 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2];
133
134 message = aValue;
135 messageLength = message.length;
136
137 //Pre-processing:
138 message.push(0x80); //append a single "1" bit to message
139
140 _c = (512 - (((messageLength + 1) * charBits) % 512) - 64) / charBits;
141 for (_i=0; _i<_c; _i++) {
142 message.push(0x00); //append "0" bits until message length ≡ 448 ≡ -64 (mod 512)
143 }
144 messageLengthInBits = messageLength * charBits;
145 message.push(0x00); //the 4 most high byte are alway 0 as message length is represented with a 32bit value;
146 message.push(0x00);
147 message.push(0x00);
148 message.push(0x00);
149 message.push((messageLengthInBits >> 24)& 0xff);
150 message.push((messageLengthInBits >> 16)& 0xff);
151 message.push((messageLengthInBits >> 8) & 0xff);
152 message.push( messageLengthInBits & 0xff);
153
154 currentMessageIndex = 0;
155 while(currentMessageIndex < message.length) {
156 varw;
157 vara, b, c, d, e, f, g, h;
158
159 w = Array(64);
160
161 _c = 16;
162 for (_i=0; _i<_c; _i++) {
163 var _j;
164
165 _j = currentMessageIndex + _i*4;
166 w[_i] = (message[_j] << 24) | (message[_j + 1] << 16) | (message[_j + 2] << 8) | (message[_j + 3] << 0);
167 }
168
169 _c = 64;
170 for (_i=16; _i<_c; _i++) {
171 vars0, s1;
172
173 s0 = (rotateRight(w[_i-15], 7)) ^ (rotateRight(w[_i-15], 18)) ^ (shiftRight(w[_i-15], 3));
174 s1 = (rotateRight(w[_i-2], 17)) ^ (rotateRight(w[_i-2], 19)) ^ (shiftRight(w[_i-2], 10));
175 w[_i] = safeAdd(w[_i-16], s0, w[_i-7], s1);
176 }
177
178 a=h0; b=h1; c=h2; d=h3; e=h4; f=h5; g=h6; h=h7;
179
180 _c = 64;
181 for (_i=0; _i<_c; _i++) {
182 var s0, s1, ch, maj, t1, t2;
183
184 s0 = (rotateRight(a, 2)) ^ (rotateRight(a, 13)) ^ (rotateRight(a, 22));
185 maj = (a & b) ^ (a & c) ^ (b & c);
186 t2 = safeAdd(s0, maj);
187 s1 = (rotateRight(e, 6)) ^ (rotateRight(e, 11)) ^ (rotateRight(e, 25));
188 ch = (e & f) ^ ((~e) & g);
189 t1 = safeAdd(h, s1, ch, k[_i], w[_i]);
190
191 h = g;
192 g = f;
193 f = e;
194 e = safeAdd(d, t1);
195 d = c;
196 c = b;
197 b = a;
198 a = safeAdd(t1, t2);
199 }
200
201 h0 = safeAdd(h0, a);
202 h1 = safeAdd(h1, b);
203 h2 = safeAdd(h2, c);
204 h3 = safeAdd(h3, d);
205 h4 = safeAdd(h4, e);
206 h5 = safeAdd(h5, f);
207 h6 = safeAdd(h6, g);
208 h7 = safeAdd(h7, h);
209
210 currentMessageIndex += bytesPerBlock;
211 }
212
213 result = new Array(256/8);
214 result[0] = (h0 >> 24)& 0xff;
215 result[1] = (h0 >> 16)& 0xff;
216 result[2] = (h0 >> 8)& 0xff;
217 result[3] = h0 & 0xff;
218
219 result[4] = (h1 >> 24)& 0xff;
220 result[5] = (h1 >> 16)& 0xff;
221 result[6] = (h1 >> 8)& 0xff;
222 result[7] = h1 & 0xff;
223
224 result[8] = (h2 >> 24)& 0xff;
225 result[9] = (h2 >> 16)& 0xff;
226 result[10] = (h2 >> 8)& 0xff;
227 result[11] = h2 & 0xff;
228
229 result[12] = (h3 >> 24)& 0xff;
230 result[13] = (h3 >> 16)& 0xff;
231 result[14] = (h3 >> 8)& 0xff;
232 result[15] = h3 & 0xff;
233
234 result[16] = (h4 >> 24)& 0xff;
235 result[17] = (h4 >> 16)& 0xff;
236 result[18] = (h4 >> 8)& 0xff;
237 result[19] = h4 & 0xff;
238
239 result[20] = (h5 >> 24)& 0xff;
240 result[21] = (h5 >> 16)& 0xff;
241 result[22] = (h5 >> 8)& 0xff;
242 result[23] = h5 & 0xff;
243
244 result[24] = (h6 >> 24)& 0xff;
245 result[25] = (h6 >> 16)& 0xff;
246 result[26] = (h6 >> 8)& 0xff;
247 result[27] = h6 & 0xff;
248
249 result[28] = (h7 >> 24)& 0xff;
250 result[29] = (h7 >> 16)& 0xff;
251 result[30] = (h7 >> 8)& 0xff;
252 result[31] = h7 & 0xff;
253
254//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256_array");
255 return result;
256 },
257
258 //-----------------------------------------------------------------------------
259
260 'sha256': function(aValue) {
261//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha256");
262 var result;
263 var resultArray;
264 varvalueArray;
265
266 valueArray = aValue.arrayValues();
267 resultArray = Clipperz.Crypto.SHA.sha256_array(valueArray);
268
269 result = new Clipperz.ByteArray(resultArray);
270
271//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256");
272 return result;
273 },
274
275 //-----------------------------------------------------------------------------
276
277 'sha_d256': function(aValue) {
278//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha_d256");
279 var result;
280 var resultArray;
281 varvalueArray;
282
283 valueArray = aValue.arrayValues();
284 resultArray = Clipperz.Crypto.SHA.sha256_array(valueArray);
285 resultArray = Clipperz.Crypto.SHA.sha256_array(resultArray);
286
287 result = new Clipperz.ByteArray(resultArray);
288
289//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256");
290 return result;
291 },
292
293 //-----------------------------------------------------------------------------
294 __syntaxFix__: "syntax fix"
295
296});