author | Giulio Cesare Solaroli <giulio.cesare@clipperz.com> | 2011-10-02 23:56:18 (UTC) |
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committer | Giulio Cesare Solaroli <giulio.cesare@clipperz.com> | 2011-10-02 23:56:18 (UTC) |
commit | ef68436ac04da078ffdcacd7e1f785473a303d45 (patch) (side-by-side diff) | |
tree | c403752d66a2c4775f00affd4fa8431b29c5b68c /frontend/gamma/js/Clipperz/Crypto/SHA.js | |
parent | 597ecfbc0249d83e1b856cbd558340c01237a360 (diff) | |
download | clipperz-ef68436ac04da078ffdcacd7e1f785473a303d45.zip clipperz-ef68436ac04da078ffdcacd7e1f785473a303d45.tar.gz clipperz-ef68436ac04da078ffdcacd7e1f785473a303d45.tar.bz2 |
First version of the newly restructured repository
Diffstat (limited to 'frontend/gamma/js/Clipperz/Crypto/SHA.js') (more/less context) (ignore whitespace changes)
-rw-r--r-- | frontend/gamma/js/Clipperz/Crypto/SHA.js | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/frontend/gamma/js/Clipperz/Crypto/SHA.js b/frontend/gamma/js/Clipperz/Crypto/SHA.js new file mode 100644 index 0000000..3cf8559 --- a/dev/null +++ b/frontend/gamma/js/Clipperz/Crypto/SHA.js @@ -0,0 +1,301 @@ +/* + +Copyright 2008-2011 Clipperz Srl + +This file is part of Clipperz's Javascript Crypto Library. +Javascript Crypto Library provides web developers with an extensive +and efficient set of cryptographic functions. The library aims to +obtain maximum execution speed while preserving modularity and +reusability. +For further information about its features and functionalities please +refer to http://www.clipperz.com + +* Javascript Crypto Library is free software: you can redistribute + it and/or modify it under the terms of the GNU Affero General Public + License as published by the Free Software Foundation, either version + 3 of the License, or (at your option) any later version. + +* Javascript Crypto Library is distributed in the hope that it will + be useful, but WITHOUT ANY WARRANTY; without even the implied + warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU Affero General Public License for more details. + +* You should have received a copy of the GNU Affero General Public + License along with Javascript Crypto Library. If not, see + <http://www.gnu.org/licenses/>. + +*/ + +try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) { + throw "Clipperz.Crypto.PRNG depends on Clipperz.ByteArray!"; +} + +if (typeof(Clipperz.Crypto) == 'undefined') { Clipperz.Crypto = {}; } +if (typeof(Clipperz.Crypto.SHA) == 'undefined') { Clipperz.Crypto.SHA = {}; } + +Clipperz.Crypto.SHA.VERSION = "0.3"; +Clipperz.Crypto.SHA.NAME = "Clipperz.Crypto.SHA"; + +MochiKit.Base.update(Clipperz.Crypto.SHA, { + + '__repr__': function () { + return "[" + this.NAME + " " + this.VERSION + "]"; + }, + + 'toString': function () { + return this.__repr__(); + }, + + //----------------------------------------------------------------------------- + + 'rotateRight': function(aValue, aNumberOfBits) { +//Clipperz.Profile.start("Clipperz.Crypto.SHA.rotateRight"); + var result; + + result = (aValue >>> aNumberOfBits) | (aValue << (32 - aNumberOfBits)); + +//Clipperz.Profile.stop("Clipperz.Crypto.SHA.rotateRight"); + return result; + }, + + 'shiftRight': function(aValue, aNumberOfBits) { +//Clipperz.Profile.start("Clipperz.Crypto.SHA.shiftRight"); + var result; + + result = aValue >>> aNumberOfBits; + +//Clipperz.Profile.stop("Clipperz.Crypto.SHA.shiftRight"); + return result; + }, + + //----------------------------------------------------------------------------- + + 'safeAdd': function() { +//Clipperz.Profile.start("Clipperz.Crypto.SHA.safeAdd"); + var result; + var i, c; + + result = arguments[0]; + c = arguments.length; + for (i=1; i<c; i++) { + var lowerBytesSum; + + lowerBytesSum = (result & 0xffff) + (arguments[i] & 0xffff); + result = (((result >> 16) + (arguments[i] >> 16) + (lowerBytesSum >> 16)) << 16) | (lowerBytesSum & 0xffff); + } + +//Clipperz.Profile.stop("Clipperz.Crypto.SHA.safeAdd"); + return result; + }, + + //----------------------------------------------------------------------------- + + 'sha256_array': function(aValue) { +//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha256_array"); + var result; + var message; + var h0, h1, h2, h3, h4, h5, h6, h7; + var k; + var messageLength; + var messageLengthInBits; + var _i, _c; + var charBits; + var rotateRight; + var shiftRight; + var safeAdd; + var bytesPerBlock; + var currentMessageIndex; + + bytesPerBlock = 512/8; + rotateRight = Clipperz.Crypto.SHA.rotateRight; + shiftRight = Clipperz.Crypto.SHA.shiftRight; + safeAdd = Clipperz.Crypto.SHA.safeAdd; + + charBits = 8; + + h0 = 0x6a09e667; + h1 = 0xbb67ae85; + h2 = 0x3c6ef372; + h3 = 0xa54ff53a; + h4 = 0x510e527f; + h5 = 0x9b05688c; + h6 = 0x1f83d9ab; + h7 = 0x5be0cd19; + + k = [ 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, + 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, + 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, + 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, + 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, + 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, + 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, + 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2]; + + message = aValue; + messageLength = message.length; + + //Pre-processing: + message.push(0x80); // append a single "1" bit to message + + _c = (512 - (((messageLength + 1) * charBits) % 512) - 64) / charBits; + if (_c < 0) { + _c = _c + (512 / charBits); + } + + for (_i=0; _i<_c; _i++) { + message.push(0x00); // append "0" bits until message length ≡ 448 ≡ -64 (mod 512) + } + + messageLengthInBits = messageLength * charBits; + message.push(0x00); // the 4 most high byte are alway 0 as message length is represented with a 32bit value; + message.push(0x00); + message.push(0x00); + message.push(0x00); + message.push((messageLengthInBits >> 24) & 0xff); + message.push((messageLengthInBits >> 16) & 0xff); + message.push((messageLengthInBits >> 8) & 0xff); + message.push( messageLengthInBits & 0xff); + + currentMessageIndex = 0; + while(currentMessageIndex < message.length) { + var w; + var a, b, c, d, e, f, g, h; + + w = Array(64); + + _c = 16; + for (_i=0; _i<_c; _i++) { + var _j; + + _j = currentMessageIndex + _i*4; + w[_i] = (message[_j] << 24) | (message[_j + 1] << 16) | (message[_j + 2] << 8) | (message[_j + 3] << 0); + } + + _c = 64; + for (_i=16; _i<_c; _i++) { + var s0, s1; + + s0 = (rotateRight(w[_i-15], 7)) ^ (rotateRight(w[_i-15], 18)) ^ (shiftRight(w[_i-15], 3)); + s1 = (rotateRight(w[_i-2], 17)) ^ (rotateRight(w[_i-2], 19)) ^ (shiftRight(w[_i-2], 10)); + w[_i] = safeAdd(w[_i-16], s0, w[_i-7], s1); + } + + a=h0; b=h1; c=h2; d=h3; e=h4; f=h5; g=h6; h=h7; + + _c = 64; + for (_i=0; _i<_c; _i++) { + var s0, s1, ch, maj, t1, t2; + + s0 = (rotateRight(a, 2)) ^ (rotateRight(a, 13)) ^ (rotateRight(a, 22)); + maj = (a & b) ^ (a & c) ^ (b & c); + t2 = safeAdd(s0, maj); + s1 = (rotateRight(e, 6)) ^ (rotateRight(e, 11)) ^ (rotateRight(e, 25)); + ch = (e & f) ^ ((~e) & g); + t1 = safeAdd(h, s1, ch, k[_i], w[_i]); + + h = g; + g = f; + f = e; + e = safeAdd(d, t1); + d = c; + c = b; + b = a; + a = safeAdd(t1, t2); + } + + h0 = safeAdd(h0, a); + h1 = safeAdd(h1, b); + h2 = safeAdd(h2, c); + h3 = safeAdd(h3, d); + h4 = safeAdd(h4, e); + h5 = safeAdd(h5, f); + h6 = safeAdd(h6, g); + h7 = safeAdd(h7, h); + + currentMessageIndex += bytesPerBlock; + } + + result = new Array(256/8); + result[0] = (h0 >> 24) & 0xff; + result[1] = (h0 >> 16) & 0xff; + result[2] = (h0 >> 8) & 0xff; + result[3] = h0 & 0xff; + + result[4] = (h1 >> 24) & 0xff; + result[5] = (h1 >> 16) & 0xff; + result[6] = (h1 >> 8) & 0xff; + result[7] = h1 & 0xff; + + result[8] = (h2 >> 24) & 0xff; + result[9] = (h2 >> 16) & 0xff; + result[10] = (h2 >> 8) & 0xff; + result[11] = h2 & 0xff; + + result[12] = (h3 >> 24) & 0xff; + result[13] = (h3 >> 16) & 0xff; + result[14] = (h3 >> 8) & 0xff; + result[15] = h3 & 0xff; + + result[16] = (h4 >> 24) & 0xff; + result[17] = (h4 >> 16) & 0xff; + result[18] = (h4 >> 8) & 0xff; + result[19] = h4 & 0xff; + + result[20] = (h5 >> 24) & 0xff; + result[21] = (h5 >> 16) & 0xff; + result[22] = (h5 >> 8) & 0xff; + result[23] = h5 & 0xff; + + result[24] = (h6 >> 24) & 0xff; + result[25] = (h6 >> 16) & 0xff; + result[26] = (h6 >> 8) & 0xff; + result[27] = h6 & 0xff; + + result[28] = (h7 >> 24) & 0xff; + result[29] = (h7 >> 16) & 0xff; + result[30] = (h7 >> 8) & 0xff; + result[31] = h7 & 0xff; + +//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256_array"); + return result; + }, + + //----------------------------------------------------------------------------- + + 'sha256': function(aValue) { +//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha256"); + var result; + var resultArray; + var valueArray; + + valueArray = aValue.arrayValues(); + resultArray = Clipperz.Crypto.SHA.sha256_array(valueArray); + + result = new Clipperz.ByteArray(resultArray); + +//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256"); + return result; + }, + + //----------------------------------------------------------------------------- + + 'sha_d256': function(aValue) { +//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha_d256"); + var result; + var resultArray; + var valueArray; + + valueArray = aValue.arrayValues(); + resultArray = Clipperz.Crypto.SHA.sha256_array(valueArray); + resultArray = Clipperz.Crypto.SHA.sha256_array(resultArray); + + result = new Clipperz.ByteArray(resultArray); + +//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256"); + return result; + }, + + //----------------------------------------------------------------------------- + __syntaxFix__: "syntax fix" + +}); |