297 lines
8.7 KiB
JavaScript
297 lines
8.7 KiB
JavaScript
/*
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Copyright 2008-2011 Clipperz Srl
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This file is part of Clipperz's Javascript Crypto Library.
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Javascript Crypto Library provides web developers with an extensive
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and efficient set of cryptographic functions. The library aims to
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obtain maximum execution speed while preserving modularity and
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reusability.
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For further information about its features and functionalities please
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refer to http://www.clipperz.com
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* Javascript Crypto Library is free software: you can redistribute
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it and/or modify it under the terms of the GNU Affero General Public
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License as published by the Free Software Foundation, either version
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3 of the License, or (at your option) any later version.
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* Javascript Crypto Library is distributed in the hope that it will
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be useful, but WITHOUT ANY WARRANTY; without even the implied
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU Affero General Public
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License along with Javascript Crypto Library. If not, see
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<http://www.gnu.org/licenses/>.
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*/
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try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) {
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throw "Clipperz.Crypto.PRNG depends on Clipperz.ByteArray!";
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}
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if (typeof(Clipperz.Crypto) == 'undefined') { Clipperz.Crypto = {}; }
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if (typeof(Clipperz.Crypto.SHA) == 'undefined') { Clipperz.Crypto.SHA = {}; }
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Clipperz.Crypto.SHA.VERSION = "0.3";
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Clipperz.Crypto.SHA.NAME = "Clipperz.Crypto.SHA";
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MochiKit.Base.update(Clipperz.Crypto.SHA, {
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'__repr__': function () {
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return "[" + this.NAME + " " + this.VERSION + "]";
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},
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'toString': function () {
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return this.__repr__();
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},
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//-----------------------------------------------------------------------------
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'rotateRight': function(aValue, aNumberOfBits) {
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//Clipperz.Profile.start("Clipperz.Crypto.SHA.rotateRight");
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var result;
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result = (aValue >>> aNumberOfBits) | (aValue << (32 - aNumberOfBits));
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//Clipperz.Profile.stop("Clipperz.Crypto.SHA.rotateRight");
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return result;
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},
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'shiftRight': function(aValue, aNumberOfBits) {
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//Clipperz.Profile.start("Clipperz.Crypto.SHA.shiftRight");
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var result;
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result = aValue >>> aNumberOfBits;
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//Clipperz.Profile.stop("Clipperz.Crypto.SHA.shiftRight");
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return result;
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},
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//-----------------------------------------------------------------------------
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'safeAdd': function() {
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//Clipperz.Profile.start("Clipperz.Crypto.SHA.safeAdd");
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var result;
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var i, c;
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result = arguments[0];
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c = arguments.length;
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for (i=1; i<c; i++) {
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var lowerBytesSum;
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lowerBytesSum = (result & 0xffff) + (arguments[i] & 0xffff);
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result = (((result >> 16) + (arguments[i] >> 16) + (lowerBytesSum >> 16)) << 16) | (lowerBytesSum & 0xffff);
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}
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//Clipperz.Profile.stop("Clipperz.Crypto.SHA.safeAdd");
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return result;
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},
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//-----------------------------------------------------------------------------
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'sha256_array': function(aValue) {
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//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha256_array");
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var result;
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var message;
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var h0, h1, h2, h3, h4, h5, h6, h7;
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var k;
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var messageLength;
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var messageLengthInBits;
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var _i, _c;
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var charBits;
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var rotateRight;
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var shiftRight;
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var safeAdd;
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var bytesPerBlock;
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var currentMessageIndex;
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bytesPerBlock = 512/8;
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rotateRight = Clipperz.Crypto.SHA.rotateRight;
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shiftRight = Clipperz.Crypto.SHA.shiftRight;
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safeAdd = Clipperz.Crypto.SHA.safeAdd;
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charBits = 8;
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h0 = 0x6a09e667;
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h1 = 0xbb67ae85;
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h2 = 0x3c6ef372;
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h3 = 0xa54ff53a;
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h4 = 0x510e527f;
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h5 = 0x9b05688c;
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h6 = 0x1f83d9ab;
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h7 = 0x5be0cd19;
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k = [ 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2];
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message = aValue;
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messageLength = message.length;
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//Pre-processing:
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message.push(0x80); // append a single "1" bit to message
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_c = (512 - (((messageLength + 1) * charBits) % 512) - 64) / charBits;
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for (_i=0; _i<_c; _i++) {
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message.push(0x00); // append "0" bits until message length ≡ 448 ≡ -64 (mod 512)
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}
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messageLengthInBits = messageLength * charBits;
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message.push(0x00); // the 4 most high byte are alway 0 as message length is represented with a 32bit value;
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message.push(0x00);
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message.push(0x00);
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message.push(0x00);
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message.push((messageLengthInBits >> 24) & 0xff);
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message.push((messageLengthInBits >> 16) & 0xff);
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message.push((messageLengthInBits >> 8) & 0xff);
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message.push( messageLengthInBits & 0xff);
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currentMessageIndex = 0;
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while(currentMessageIndex < message.length) {
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var w;
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var a, b, c, d, e, f, g, h;
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w = Array(64);
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_c = 16;
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for (_i=0; _i<_c; _i++) {
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var _j;
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_j = currentMessageIndex + _i*4;
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w[_i] = (message[_j] << 24) | (message[_j + 1] << 16) | (message[_j + 2] << 8) | (message[_j + 3] << 0);
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}
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_c = 64;
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for (_i=16; _i<_c; _i++) {
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var s0, s1;
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s0 = (rotateRight(w[_i-15], 7)) ^ (rotateRight(w[_i-15], 18)) ^ (shiftRight(w[_i-15], 3));
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s1 = (rotateRight(w[_i-2], 17)) ^ (rotateRight(w[_i-2], 19)) ^ (shiftRight(w[_i-2], 10));
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w[_i] = safeAdd(w[_i-16], s0, w[_i-7], s1);
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}
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a=h0; b=h1; c=h2; d=h3; e=h4; f=h5; g=h6; h=h7;
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_c = 64;
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for (_i=0; _i<_c; _i++) {
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var s0, s1, ch, maj, t1, t2;
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s0 = (rotateRight(a, 2)) ^ (rotateRight(a, 13)) ^ (rotateRight(a, 22));
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maj = (a & b) ^ (a & c) ^ (b & c);
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t2 = safeAdd(s0, maj);
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s1 = (rotateRight(e, 6)) ^ (rotateRight(e, 11)) ^ (rotateRight(e, 25));
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ch = (e & f) ^ ((~e) & g);
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t1 = safeAdd(h, s1, ch, k[_i], w[_i]);
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h = g;
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g = f;
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f = e;
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e = safeAdd(d, t1);
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d = c;
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c = b;
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b = a;
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a = safeAdd(t1, t2);
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}
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h0 = safeAdd(h0, a);
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h1 = safeAdd(h1, b);
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h2 = safeAdd(h2, c);
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h3 = safeAdd(h3, d);
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h4 = safeAdd(h4, e);
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h5 = safeAdd(h5, f);
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h6 = safeAdd(h6, g);
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h7 = safeAdd(h7, h);
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currentMessageIndex += bytesPerBlock;
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}
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result = new Array(256/8);
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result[0] = (h0 >> 24) & 0xff;
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result[1] = (h0 >> 16) & 0xff;
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result[2] = (h0 >> 8) & 0xff;
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result[3] = h0 & 0xff;
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result[4] = (h1 >> 24) & 0xff;
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result[5] = (h1 >> 16) & 0xff;
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result[6] = (h1 >> 8) & 0xff;
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result[7] = h1 & 0xff;
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result[8] = (h2 >> 24) & 0xff;
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result[9] = (h2 >> 16) & 0xff;
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result[10] = (h2 >> 8) & 0xff;
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result[11] = h2 & 0xff;
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result[12] = (h3 >> 24) & 0xff;
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result[13] = (h3 >> 16) & 0xff;
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result[14] = (h3 >> 8) & 0xff;
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result[15] = h3 & 0xff;
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result[16] = (h4 >> 24) & 0xff;
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result[17] = (h4 >> 16) & 0xff;
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result[18] = (h4 >> 8) & 0xff;
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result[19] = h4 & 0xff;
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result[20] = (h5 >> 24) & 0xff;
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result[21] = (h5 >> 16) & 0xff;
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result[22] = (h5 >> 8) & 0xff;
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result[23] = h5 & 0xff;
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result[24] = (h6 >> 24) & 0xff;
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result[25] = (h6 >> 16) & 0xff;
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result[26] = (h6 >> 8) & 0xff;
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result[27] = h6 & 0xff;
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result[28] = (h7 >> 24) & 0xff;
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result[29] = (h7 >> 16) & 0xff;
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result[30] = (h7 >> 8) & 0xff;
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result[31] = h7 & 0xff;
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//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256_array");
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return result;
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},
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//-----------------------------------------------------------------------------
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'sha256': function(aValue) {
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//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha256");
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var result;
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var resultArray;
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var valueArray;
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valueArray = aValue.arrayValues();
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resultArray = Clipperz.Crypto.SHA.sha256_array(valueArray);
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result = new Clipperz.ByteArray(resultArray);
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//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256");
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return result;
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},
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//-----------------------------------------------------------------------------
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'sha_d256': function(aValue) {
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//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha_d256");
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var result;
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var resultArray;
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var valueArray;
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valueArray = aValue.arrayValues();
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resultArray = Clipperz.Crypto.SHA.sha256_array(valueArray);
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resultArray = Clipperz.Crypto.SHA.sha256_array(resultArray);
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result = new Clipperz.ByteArray(resultArray);
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//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256");
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return result;
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},
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//-----------------------------------------------------------------------------
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__syntaxFix__: "syntax fix"
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});
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