Diffstat (limited to 'frontend/delta/js/Clipperz/Crypto/AES.js') (more/less context) (ignore whitespace changes)
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1 files changed, 859 insertions, 0 deletions
diff --git a/frontend/delta/js/Clipperz/Crypto/AES.js b/frontend/delta/js/Clipperz/Crypto/AES.js new file mode 100644 index 0000000..cb56f11 --- a/dev/null +++ b/frontend/delta/js/Clipperz/Crypto/AES.js @@ -0,0 +1,859 @@ +/* + +Copyright 2008-2013 Clipperz Srl + +This file is part of Clipperz, the online password manager. +For further information about its features and functionalities please +refer to http://www.clipperz.com. + +* Clipperz 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. + +* Clipperz 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 Clipperz. If not, see http://www.gnu.org/licenses/. + +*/ + +try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) { + throw "Clipperz.Crypto.AES depends on Clipperz.ByteArray!"; +} + +// Dependency commented to avoid a circular reference +//try { if (typeof(Clipperz.Crypto.PRNG) == 'undefined') { throw ""; }} catch (e) { +// throw "Clipperz.Crypto.AES depends on Clipperz.Crypto.PRNG!"; +//} + +if (typeof(Clipperz.Crypto.AES) == 'undefined') { Clipperz.Crypto.AES = {}; } + +//############################################################################# + +Clipperz.Crypto.AES.DeferredExecutionContext = function(args) { + args = args || {}; + + this._key = args.key; + this._message = args.message; + this._result = args.message.clone(); + this._nonce = args.nonce; + this._messageLength = this._message.length(); + + this._messageArray = this._message.arrayValues(); + this._resultArray = this._result.arrayValues(); + this._nonceArray = this._nonce.arrayValues(); + + this._executionStep = 0; + +// this._elaborationChunkSize = 1024; // 4096; // 16384; // 4096; + this._elaborationChunks = 10; + this._pauseTime = 0.02; // 0.02 // 0.2; + + return this; +} + +Clipperz.Crypto.AES.DeferredExecutionContext.prototype = MochiKit.Base.update(null, { + + 'key': function() { + return this._key; + }, + + 'message': function() { + return this._message; + }, + + 'messageLength': function() { + return this._messageLength; + }, + + 'result': function() { + return new Clipperz.ByteArray(this.resultArray()); + }, + + 'nonce': function() { + return this._nonce; + }, + + 'messageArray': function() { + return this._messageArray; + }, + + 'resultArray': function() { + return this._resultArray; + }, + + 'nonceArray': function() { + return this._nonceArray; + }, + + 'elaborationChunkSize': function() { +// return Clipperz.Crypto.AES.DeferredExecution.chunkSize; +// return this._elaborationChunkSize; + return (this._elaborationChunks * 1024); + }, + + 'executionStep': function() { + return this._executionStep; + }, + + 'setExecutionStep': function(aValue) { + this._executionStep = aValue; + }, + + 'tuneExecutionParameters': function (anElapsedTime) { +//var originalChunks = this._elaborationChunks; + if (anElapsedTime > 0) { + this._elaborationChunks = Math.round(this._elaborationChunks * ((anElapsedTime + 1000)/(anElapsedTime * 2))); + } +//Clipperz.log("tuneExecutionParameters - elapsedTime: " + anElapsedTime + /*originalChunks,*/ " chunks # " + this._elaborationChunks + " [" + this._executionStep + " / " + this._messageLength + "]"); + }, + + 'pause': function(aValue) { +// return MochiKit.Async.wait(Clipperz.Crypto.AES.DeferredExecution.pauseTime, aValue); + return MochiKit.Async.wait(this._pauseTime, aValue); + }, + + 'isDone': function () { + return (this._executionStep >= this._messageLength); + }, + + //----------------------------------------------------------------------------- + __syntaxFix__: "syntax fix" + +}); + +//############################################################################# + +Clipperz.Crypto.AES.Key = function(args) { + args = args || {}; + + this._key = args.key; + this._keySize = args.keySize || this.key().length(); + + if (this.keySize() == 128/8) { + this._b = 176; + this._numberOfRounds = 10; + } else if (this.keySize() == 256/8) { + this._b = 240; + this._numberOfRounds = 14; + } else { + Clipperz.logError("AES unsupported key size: " + (this.keySize() * 8) + " bits"); + throw Clipperz.Crypto.AES.exception.UnsupportedKeySize; + } + + this._stretchedKey = null; + + return this; +} + +Clipperz.Crypto.AES.Key.prototype = MochiKit.Base.update(null, { + + 'asString': function() { + return "Clipperz.Crypto.AES.Key (" + this.key().toHexString() + ")"; + }, + + //----------------------------------------------------------------------------- + + 'key': function() { + return this._key; + }, + + 'keySize': function() { + return this._keySize; + }, + + 'b': function() { + return this._b; + }, + + 'numberOfRounds': function() { + return this._numberOfRounds; + }, + //========================================================================= + + 'keyScheduleCore': function(aWord, aRoundConstantsIndex) { + var result; + var sbox; + + sbox = Clipperz.Crypto.AES.sbox(); + + result = [ sbox[aWord[1]] ^ Clipperz.Crypto.AES.roundConstants()[aRoundConstantsIndex], + sbox[aWord[2]], + sbox[aWord[3]], + sbox[aWord[0]] ]; + + return result; + }, + + //----------------------------------------------------------------------------- + + 'xorWithPreviousStretchValues': function(aKey, aWord, aPreviousWordIndex) { + var result; + var i,c; + + result = []; + c = 4; + for (i=0; i<c; i++) { + result[i] = aWord[i] ^ aKey.byteAtIndex(aPreviousWordIndex + i); + } + + return result; + }, + + //----------------------------------------------------------------------------- + + 'sboxShakeup': function(aWord) { + var result; + var sbox; + var i,c; + + result = []; + sbox = Clipperz.Crypto.AES.sbox(); + c =4; + for (i=0; i<c; i++) { + result[i] = sbox[aWord[i]]; + } + + return result; + }, + + //----------------------------------------------------------------------------- + + 'stretchKey': function(aKey) { + var currentWord; + var keyLength; + var previousStretchIndex; + var i,c; + + keyLength = aKey.length(); + previousStretchIndex = keyLength - this.keySize(); + + currentWord = [ aKey.byteAtIndex(keyLength - 4), + aKey.byteAtIndex(keyLength - 3), + aKey.byteAtIndex(keyLength - 2), + aKey.byteAtIndex(keyLength - 1) ]; + currentWord = this.keyScheduleCore(currentWord, keyLength / this.keySize()); + + if (this.keySize() == 256/8) { + c = 8; + } else if (this.keySize() == 128/8){ + c = 4; + } + + for (i=0; i<c; i++) { + if (i == 4) { + // fifth streatch word + currentWord = this.sboxShakeup(currentWord); + } + + currentWord = this.xorWithPreviousStretchValues(aKey, currentWord, previousStretchIndex + (i*4)); + aKey.appendBytes(currentWord); + } + + return aKey; + }, + + //----------------------------------------------------------------------------- + + 'stretchedKey': function() { + if (this._stretchedKey == null) { + var stretchedKey; + + stretchedKey = this.key().clone(); + + while (stretchedKey.length() < this.keySize()) { + stretchedKey.appendByte(0); + } + + while (stretchedKey.length() < this.b()) { + stretchedKey = this.stretchKey(stretchedKey); + } + + this._stretchedKey = stretchedKey.split(0, this.b()); + } + + return this._stretchedKey; + }, + + //========================================================================= + __syntaxFix__: "syntax fix" +}); + +//############################################################################# + +Clipperz.Crypto.AES.State = function(args) { + args = args || {}; + + this._data = args.block; + this._key = args.key; + + return this; +} + +Clipperz.Crypto.AES.State.prototype = MochiKit.Base.update(null, { + + 'key': function() { + return this._key; + }, + + //----------------------------------------------------------------------------- + + 'data': function() { + return this._data; + }, + + 'setData': function(aValue) { + this._data = aValue; + }, + + //========================================================================= + + 'addRoundKey': function(aRoundNumber) { + // each byte of the state is combined with the round key; each round key is derived from the cipher key using a key schedule. + var data; + var stretchedKey; + var firstStretchedKeyIndex; + var i,c; + + data = this.data(); + stretchedKey = this.key().stretchedKey(); + firstStretchedKeyIndex = aRoundNumber * (128/8); + c = 128/8; + for (i=0; i<c; i++) { + data[i] = data[i] ^ stretchedKey.byteAtIndex(firstStretchedKeyIndex + i); + } + }, + + //----------------------------------------------------------------------------- + + 'subBytes': function() { + // a non-linear substitution step where each byte is replaced with another according to a lookup table. + var i,c; + var data; + var sbox; + + data = this.data(); + sbox = Clipperz.Crypto.AES.sbox(); + + c = 16; + for (i=0; i<c; i++) { + data[i] = sbox[data[i]]; + } + }, + + //----------------------------------------------------------------------------- + + 'shiftRows': function() { + // a transposition step where each row of the state is shifted cyclically a certain number of steps. + var newValue; + var data; + var shiftMapping; + var i,c; + + newValue = new Array(16); + data = this.data(); + shiftMapping = Clipperz.Crypto.AES.shiftRowMapping(); +// [0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, 1, 6, 11]; + c = 16; + for (i=0; i<c; i++) { + newValue[i] = data[shiftMapping[i]]; + } + for (i=0; i<c; i++) { + data[i] = newValue[i]; + } + }, + + //----------------------------------------------------------------------------- +/* + 'mixColumnsWithValues': function(someValues) { + var result; + var a; + var i,c; + + c = 4; + result = []; + a = []; + for (i=0; i<c; i++) { + a[i] = []; + a[i][1] = someValues[i] + if ((a[i][1] & 0x80) == 0x80) { + a[i][2] = (a[i][1] << 1) ^ 0x11b; + } else { + a[i][2] = a[i][1] << 1; + } + + a[i][3] = a[i][2] ^ a[i][1]; + } + + for (i=0; i<c; i++) { + var x; + + x = Clipperz.Crypto.AES.mixColumnsMatrix()[i]; + result[i] = a[0][x[0]] ^ a[1][x[1]] ^ a[2][x[2]] ^ a[3][x[3]]; + } + + return result; + }, + + 'mixColumns': function() { + // a mixing operation which operates on the columns of the state, combining the four bytes in each column using a linear transformation. + var data; + var i, c; + + data = this.data(); + c = 4; + for(i=0; i<c; i++) { + var blockIndex; + var mixedValues; + + blockIndex = i * 4; + mixedValues = this.mixColumnsWithValues([ data[blockIndex + 0], + data[blockIndex + 1], + data[blockIndex + 2], + data[blockIndex + 3]]); + data[blockIndex + 0] = mixedValues[0]; + data[blockIndex + 1] = mixedValues[1]; + data[blockIndex + 2] = mixedValues[2]; + data[blockIndex + 3] = mixedValues[3]; + } + }, +*/ + + 'mixColumns': function() { + // a mixing operation which operates on the columns of the state, combining the four bytes in each column using a linear transformation. + var data; + var i, c; + var a_1; + var a_2; + + a_1 = new Array(4); + a_2 = new Array(4); + + data = this.data(); + c = 4; + for(i=0; i<c; i++) { + var blockIndex; + var ii, cc; + + blockIndex = i * 4; + + cc = 4; + for (ii=0; ii<cc; ii++) { + var value; + + value = data[blockIndex + ii]; + a_1[ii] = value; + a_2[ii] = (value & 0x80) ? ((value << 1) ^ 0x011b) : (value << 1); + } + + data[blockIndex + 0] = a_2[0] ^ a_1[1] ^ a_2[1] ^ a_1[2] ^ a_1[3]; + data[blockIndex + 1] = a_1[0] ^ a_2[1] ^ a_1[2] ^ a_2[2] ^ a_1[3]; + data[blockIndex + 2] = a_1[0] ^ a_1[1] ^ a_2[2] ^ a_1[3] ^ a_2[3]; + data[blockIndex + 3] = a_1[0] ^ a_2[0] ^ a_1[1] ^ a_1[2] ^ a_2[3]; + } + }, + + //========================================================================= + + 'spinRound': function(aRoundNumber) { + this.addRoundKey(aRoundNumber); + this.subBytes(); + this.shiftRows(); + this.mixColumns(); + }, + + 'spinLastRound': function() { + this.addRoundKey(this.key().numberOfRounds() - 1); + this.subBytes(); + this.shiftRows(); + this.addRoundKey(this.key().numberOfRounds()); + }, + + //========================================================================= + + 'encrypt': function() { + var i,c; + + c = this.key().numberOfRounds() - 1; + for (i=0; i<c; i++) { + this.spinRound(i); + } + + this.spinLastRound(); + }, + + //========================================================================= + __syntaxFix__: "syntax fix" +}); + +//############################################################################# + +Clipperz.Crypto.AES.VERSION = "0.1"; +Clipperz.Crypto.AES.NAME = "Clipperz.Crypto.AES"; + +MochiKit.Base.update(Clipperz.Crypto.AES, { + +// http://www.cs.eku.edu/faculty/styer/460/Encrypt/JS-AES.html +// http://en.wikipedia.org/wiki/Advanced_Encryption_Standard +// http://en.wikipedia.org/wiki/Rijndael_key_schedule +// http://en.wikipedia.org/wiki/Rijndael_S-box + + '__repr__': function () { + return "[" + this.NAME + " " + this.VERSION + "]"; + }, + + 'toString': function () { + return this.__repr__(); + }, + + //============================================================================= + + '_sbox': null, + 'sbox': function() { + if (Clipperz.Crypto.AES._sbox == null) { + Clipperz.Crypto.AES._sbox = [ +0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, +0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, +0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, +0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, +0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, +0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, +0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, +0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, +0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, +0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, +0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, +0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, +0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, +0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, +0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, +0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 + ]; + } + + return Clipperz.Crypto.AES._sbox; + }, + + //----------------------------------------------------------------------------- + // + // 0 4 8 12 0 4 8 12 + // 1 5 9 13 => 5 9 13 1 + // 2 6 10 14 10 14 2 6 + // 3 7 11 15 15 3 7 11 + // + '_shiftRowMapping': null, + 'shiftRowMapping': function() { + if (Clipperz.Crypto.AES._shiftRowMapping == null) { + Clipperz.Crypto.AES._shiftRowMapping = [0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, 1, 6, 11]; + } + + return Clipperz.Crypto.AES._shiftRowMapping; + }, + + //----------------------------------------------------------------------------- + + '_mixColumnsMatrix': null, + 'mixColumnsMatrix': function() { + if (Clipperz.Crypto.AES._mixColumnsMatrix == null) { + Clipperz.Crypto.AES._mixColumnsMatrix = [ [2, 3, 1 ,1], + [1, 2, 3, 1], + [1, 1, 2, 3], + [3, 1, 1, 2] ]; + } + + return Clipperz.Crypto.AES._mixColumnsMatrix; + }, + + '_roundConstants': null, + 'roundConstants': function() { + if (Clipperz.Crypto.AES._roundConstants == null) { + Clipperz.Crypto.AES._roundConstants = [ , 1, 2, 4, 8, 16, 32, 64, 128, 27, 54, 108, 216, 171, 77, 154]; +// Clipperz.Crypto.AES._roundConstants = [ , 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a]; + } + + return Clipperz.Crypto.AES._roundConstants; + }, + + //============================================================================= + + 'incrementNonce': function(aNonce) { +//Clipperz.Profile.start("Clipperz.Crypto.AES.incrementNonce"); + var i; + var done; + + done = false; + i = aNonce.length - 1; + + while ((i>=0) && (done == false)) { + var currentByteValue; + + currentByteValue = aNonce[i]; + + if (currentByteValue == 0xff) { + aNonce[i] = 0; + if (i>= 0) { + i --; + } else { + done = true; + } + } else { + aNonce[i] = currentByteValue + 1; + done = true; + } + } +//Clipperz.Profile.stop("Clipperz.Crypto.AES.incrementNonce"); + }, + + //----------------------------------------------------------------------------- + + 'encryptBlock': function(aKey, aBlock) { + var result; + var state; + + state = new Clipperz.Crypto.AES.State({block:aBlock, key:aKey}); +//is(state.data(), 'before'); + state.encrypt(); + result = state.data(); + + return result; + }, + + //----------------------------------------------------------------------------- + + 'encryptBlocks': function(aKey, aMessage, aNonce) { + var result; + var nonce; + var self; + var messageIndex; + var messageLength; + var blockSize; + + self = Clipperz.Crypto.AES; + blockSize = 128/8; + messageLength = aMessage.length; + nonce = aNonce; + + result = aMessage; + messageIndex = 0; + while (messageIndex < messageLength) { + var encryptedBlock; + var i,c; + + self.incrementNonce(nonce); + encryptedBlock = self.encryptBlock(aKey, nonce); + + if ((messageLength - messageIndex) > blockSize) { + c = blockSize; + } else { + c = messageLength - messageIndex; + } + + for (i=0; i<c; i++) { + result[messageIndex + i] = result[messageIndex + i] ^ encryptedBlock[i]; + } + + messageIndex += blockSize; + } + + return result; + }, + + //----------------------------------------------------------------------------- + + 'encrypt': function(aKey, someData, aNonce) { + var result; + var nonce; + var encryptedData; + var key; + + key = new Clipperz.Crypto.AES.Key({key:aKey}); + nonce = aNonce ? aNonce.clone() : Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(128/8); + + encryptedData = Clipperz.Crypto.AES.encryptBlocks(key, someData.arrayValues(), nonce.arrayValues()); + + result = nonce.appendBytes(encryptedData); + + return result; + }, + + //----------------------------------------------------------------------------- + + 'decrypt': function(aKey, someData) { + var result; + var nonce; + var encryptedData; + var decryptedData; + var dataIterator; + var key; + + key = new Clipperz.Crypto.AES.Key({key:aKey}); + + encryptedData = someData.arrayValues(); + nonce = encryptedData.slice(0, (128/8)); + encryptedData = encryptedData.slice(128/8); + decryptedData = Clipperz.Crypto.AES.encryptBlocks(key, encryptedData, nonce); + + result = new Clipperz.ByteArray(decryptedData); + + return result; + }, + + //============================================================================= + + 'deferredEncryptExecutionChunk': function(anExecutionContext) { + var result; + var nonce; + var self; + var messageIndex; + var messageLength; + var blockSize; + var executionLimit; + var startTime, endTime; + + self = Clipperz.Crypto.AES; + startTime = new Date(); + blockSize = 128/8; + messageLength = anExecutionContext.messageArray().length; + nonce = anExecutionContext.nonceArray(); + result = anExecutionContext.resultArray(); + + messageIndex = anExecutionContext.executionStep(); + executionLimit = messageIndex + anExecutionContext.elaborationChunkSize(); + executionLimit = Math.min(executionLimit, messageLength); + + while (messageIndex < executionLimit) { + var encryptedBlock; + var i,c; + + self.incrementNonce(nonce); + encryptedBlock = self.encryptBlock(anExecutionContext.key(), nonce); + + if ((executionLimit - messageIndex) > blockSize) { + c = blockSize; + } else { + c = executionLimit - messageIndex; + } + + for (i=0; i<c; i++) { + result[messageIndex + i] = result[messageIndex + i] ^ encryptedBlock[i]; + } + + messageIndex += blockSize; + } + anExecutionContext.setExecutionStep(messageIndex); + endTime = new Date(); + anExecutionContext.tuneExecutionParameters(endTime - startTime); + + return anExecutionContext; + }, + + //----------------------------------------------------------------------------- +/* + 'deferredEncryptBlocks': function(anExecutionContext) { + var deferredResult; + var messageSize; + var i,c; + + messageSize = anExecutionContext.messageLength(); + + deferredResult = new Clipperz.Async.Deferred("AES.deferredEncryptBloks"); + + c = Math.ceil(messageSize / anExecutionContext.elaborationChunkSize()); + for (i=0; i<c; i++) { + deferredResult.addCallback(Clipperz.Crypto.AES.deferredEncryptExecutionChunk); + deferredResult.addMethod(anExecutionContext, 'pause'); + } + + deferredResult.callback(anExecutionContext); + + return deferredResult; + }, +*/ + + 'deferredEncryptBlocks': function(anExecutionContext) { + var deferredResult; + + if (! anExecutionContext.isDone()) { + deferredResult = Clipperz.Async.callbacks("Clipperz.Crypto.AES.deferredEncryptBloks", [ + Clipperz.Crypto.AES.deferredEncryptExecutionChunk, + MochiKit.Base.method(anExecutionContext, 'pause'), + Clipperz.Crypto.AES.deferredEncryptBlocks + ], {trace:false}, anExecutionContext); + } else { + deferredResult = MochiKit.Async.succeed(anExecutionContext); + } + + return deferredResult; + }, + + //----------------------------------------------------------------------------- + + 'deferredEncrypt': function(aKey, someData, aNonce) { + var deferredResult; + var executionContext; + var result; + var nonce; + var key; + + key = new Clipperz.Crypto.AES.Key({key:aKey}); + nonce = aNonce ? aNonce.clone() : Clipperz.Crypto.PRNG.defaultRandomGenerator().getRandomBytes(128/8); + + executionContext = new Clipperz.Crypto.AES.DeferredExecutionContext({key:key, message:someData, nonce:nonce}); + + deferredResult = new Clipperz.Async.Deferred("AES.deferredEncrypt"); + deferredResult.addCallback(Clipperz.Crypto.AES.deferredEncryptBlocks); + deferredResult.addCallback(function(anExecutionContext) { + var result; + + result = anExecutionContext.nonce().clone(); + result.appendBytes(anExecutionContext.resultArray()); + + return result; + }); + deferredResult.callback(executionContext) + + return deferredResult; + }, + + //----------------------------------------------------------------------------- + + 'deferredDecrypt': function(aKey, someData) { + var deferredResult + var nonce; + var message; + var key; + + key = new Clipperz.Crypto.AES.Key({key:aKey}); + nonce = someData.split(0, (128/8)); + message = someData.split(128/8); + executionContext = new Clipperz.Crypto.AES.DeferredExecutionContext({key:key, message:message, nonce:nonce}); + + deferredResult = new Clipperz.Async.Deferred("AES.deferredDecrypt"); + deferredResult.addCallback(Clipperz.Crypto.AES.deferredEncryptBlocks); + deferredResult.addCallback(function(anExecutionContext) { + return anExecutionContext.result(); + }); + deferredResult.callback(executionContext); + + return deferredResult; + }, + + //----------------------------------------------------------------------------- + __syntaxFix__: "syntax fix" + +}); + +//############################################################################# + +//Clipperz.Crypto.AES.DeferredExecution = { +// 'chunkSize': 16384, // 4096, // 1024 4096 8192 16384 32768; +// 'pauseTime': 0.02 // 0.2 +//} + +Clipperz.Crypto.AES.exception = { + 'UnsupportedKeySize': new MochiKit.Base.NamedError("Clipperz.Crypto.AES.exception.UnsupportedKeySize") +}; |