1 files changed, 386 insertions, 0 deletions

diff --git a/frontend/gamma/js/Clipperz/Crypto/ECC/BinaryField/Value.js b/frontend/gamma/js/Clipperz/Crypto/ECC/BinaryField/Value.js
new file mode 100644
index 0000000..5a430d1
--- a/dev/null
+++ b/frontend/gamma/js/Clipperz/Crypto/ECC/BinaryField/Value.js
@@ -0,0 +1,386 @@
+/*
+
+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.ECC depends on Clipperz.ByteArray!";
+//}  
+if (typeof(Clipperz) == 'undefined') { Clipperz = {}; }
+if (typeof(Clipperz.Crypto) == 'undefined') { Clipperz.Crypto = {}; }
+if (typeof(Clipperz.Crypto.ECC) == 'undefined') { Clipperz.Crypto.ECC = {}; }
+if (typeof(Clipperz.Crypto.ECC.BinaryField) == 'undefined') { Clipperz.Crypto.ECC.BinaryField = {}; }
+
+Clipperz.Crypto.ECC.BinaryField.Value = function(aValue, aBase, aBitSize) {
+        if (aValue.constructor == String) {
+                        varvalue;
+                        varstringLength;
+                var numberOfWords;
+                        vari,c;
+        
+                if (aBase != 16) {
+                        throw Clipperz.Crypto.ECC.BinaryField.Value.exception.UnsupportedBase;
+                }
+
+                value = aValue.replace(/ /g, '');
+                stringLength = value.length;
+                numberOfWords = Math.ceil(stringLength / 8);
+                this._value = new Array(numberOfWords);
+        
+                c = numberOfWords;
+                for (i=0; i<c; i++) {
+                                varword;
+                
+                        if (i < (c-1)) {
+                                word = parseInt(value.substr(stringLength-((i+1)*8), 8), 16);
+                        } else {
+                                word = parseInt(value.substr(0, stringLength-(i*8)), 16);
+                        }
+                        
+                        this._value[i] = word;
+                }
+        } else if (aValue.constructor == Array) {
+                var itemsToCopy;
+
+                itemsToCopy = aValue.length;
+                while (aValue[itemsToCopy - 1] == 0) {
+                        itemsToCopy --;
+                }
+
+                this._value = aValue.slice(0, itemsToCopy);
+        } else if (aValue.constructor == Number) {
+                this._value = [aValue];
+        } else {
+        //      throw Clipperz.Crypto.ECC.BinaryField.Value.exception.UnsupportedConstructorValueType;
+        }
+        
+        this._bitSize == aBitSize || null;
+
+        return this;
+}
+
+Clipperz.Crypto.ECC.BinaryField.Value.prototype = MochiKit.Base.update(null, {
+
+        'value': function() {
+                return this._value;
+        },
+
+        //-----------------------------------------------------------------------------
+        
+        'wordSize': function() {
+                return this._value.length
+        },
+
+        //-----------------------------------------------------------------------------
+
+        'clone': function() {
+                return new Clipperz.Crypto.ECC.BinaryField.Value(this._value.slice(0), null, this._bitSize);
+        },
+        
+        //-----------------------------------------------------------------------------
+
+        'isZero': function() {
+                return (this.compare(Clipperz.Crypto.ECC.BinaryField.Value.O) == 0);
+        },
+
+        //-----------------------------------------------------------------------------
+
+        'asString': function(aBase) {
+                        varresult;
+                var i,c;
+                
+                if (aBase != 16) {
+                        throw Clipperz.Crypto.ECC.BinaryField.Value.exception.UnsupportedBase;
+                }
+                
+                result = "";
+                c = this.wordSize();
+                for (i=0; i<c; i++) {
+                                varwordAsString;
+                        
+        //              wordAsString = ("00000000" + this.value()[i].toString(16));
+                        wordAsString = ("00000000" + this._value[i].toString(16));
+                        wordAsString = wordAsString.substring(wordAsString.length - 8);
+                        result = wordAsString + result;
+                }
+                
+                result = result.replace(/^(00)*/, "");
+                
+                if (result == "") {
+                        result = "0";
+                }
+                
+                return result;
+        },
+        
+        //-----------------------------------------------------------------------------
+
+        'shiftLeft': function(aNumberOfBitsToShift) {
+                        //this method seems like it is never called. :-(
+                return new Clipperz.Crypto.ECC.BinaryField.Value(Clipperz.Crypto.ECC.BinaryField.Value._shiftLeft(this._value, aNumberOfBitsToShift));
+        },
+
+        //-----------------------------------------------------------------------------
+
+        'bitSize': function() {
+                if (this._bitSize == null) {
+                        this._bitSize = Clipperz.Crypto.ECC.BinaryField.Value._bitSize(this._value);
+                }
+
+                return this._bitSize;
+        },
+        
+        //-----------------------------------------------------------------------------
+
+        'isBitSet': function(aBitPosition) {
+                return Clipperz.Crypto.ECC.BinaryField.Value._isBitSet(this._value, aBitPosition);
+        },
+        
+        //-----------------------------------------------------------------------------
+
+        'xor': function(aValue) {
+                return new Clipperz.Crypto.ECC.BinaryField.Value(Clipperz.Crypto.ECC.BinaryField.Value._xor(this._value, aValue._value));
+        }, 
+
+        //-----------------------------------------------------------------------------
+
+        'compare': function(aValue) {
+                return Clipperz.Crypto.ECC.BinaryField.Value._compare(this._value, aValue._value);
+        },
+        
+        //-----------------------------------------------------------------------------
+        __syntaxFix__: "syntax fix"
+});
+
+Clipperz.Crypto.ECC.BinaryField.Value.O = new Clipperz.Crypto.ECC.BinaryField.Value('0', 16);
+Clipperz.Crypto.ECC.BinaryField.Value.I = new Clipperz.Crypto.ECC.BinaryField.Value('1', 16);
+
+Clipperz.Crypto.ECC.BinaryField.Value._xor = function(a, b, aFirstItemOffset) {
+        var result;
+        var resultSize;
+        var i,c;
+        var firstItemOffset;
+        
+        firstItemOffset = aFirstItemOffset || 0;
+        resultSize = Math.max((a.length - firstItemOffset), b.length) + firstItemOffset;
+
+        result = new Array(resultSize);
+        
+        c = firstItemOffset;
+        for (i=0; i<c; i++) {
+                result[i] = a[i];
+        }
+
+        c = resultSize;
+        for (i=firstItemOffset; i<c; i++) {
+                result[i] = (((a[i] || 0) ^ (b[i - firstItemOffset] || 0)) >>> 0);
+        }
+        
+        return result;
+};
+
+Clipperz.Crypto.ECC.BinaryField.Value._overwriteXor = function(a, b, aFirstItemOffset) {
+        var i,c;
+        var firstItemOffset;
+        
+        firstItemOffset = aFirstItemOffset || 0;
+
+        c = Math.max((a.length - firstItemOffset), b.length) + firstItemOffset;
+        for (i=firstItemOffset; i<c; i++) {
+                a[i] = (((a[i] || 0) ^ (b[i - firstItemOffset] || 0)) >>> 0);
+        }
+};
+
+Clipperz.Crypto.ECC.BinaryField.Value._shiftLeft = function(aWordArray, aNumberOfBitsToShift) {
+        var numberOfWordsToShift;
+                varnumberOfBitsToShift;
+        var result;
+                varoverflowValue;
+        var nextOverflowValue;
+                vari,c;
+
+        numberOfWordsToShift = Math.floor(aNumberOfBitsToShift / 32);
+        numberOfBitsToShift = aNumberOfBitsToShift % 32;
+
+        result = new Array(aWordArray.length + numberOfWordsToShift);
+        
+        c = numberOfWordsToShift;
+        for (i=0; i<c; i++) {
+                result[i] = 0;
+        }
+        
+        overflowValue = 0;
+        nextOverflowValue = 0;
+        
+        c = aWordArray.length;
+        for (i=0; i<c; i++) {
+                        varvalue;
+                        varresultWord;
+
+        //      value = this.value()[i];
+                value = aWordArray[i];
+
+                if (numberOfBitsToShift > 0) {
+                        nextOverflowValue = (value >>> (32 - numberOfBitsToShift));
+                        value = value & (0xffffffff >>> numberOfBitsToShift);
+                        resultWord = (((value << numberOfBitsToShift) | overflowValue) >>> 0);
+                } else {
+                        resultWord = value;
+                }
+                
+                result[i+numberOfWordsToShift] = resultWord;
+                overflowValue = nextOverflowValue;
+        }
+
+        if (overflowValue != 0) {
+                result[aWordArray.length + numberOfWordsToShift] = overflowValue;
+        }
+
+        return result;
+};
+
+Clipperz.Crypto.ECC.BinaryField.Value._overwriteShiftLeft = function(aWordArray, aNumberOfBitsToShift) {
+        var numberOfWordsToShift;
+                varnumberOfBitsToShift;
+        var result;
+                varoverflowValue;
+                vari,c;
+
+        numberOfWordsToShift = Math.floor(aNumberOfBitsToShift / 32);
+        numberOfBitsToShift = aNumberOfBitsToShift % 32;
+
+        result = new Array(aWordArray.length + numberOfWordsToShift);
+        
+        c = numberOfWordsToShift;
+        for (i=0; i<c; i++) {
+                result[i] = 0;
+        }
+        
+        overflowValue = 0;
+        nextOverflowValue = 0;
+        
+        c = aWordArray.length;
+        for (i=0; i<c; i++) {
+                        varvalue;
+                        varresultWord;
+
+        //      value = this.value()[i];
+                value = aWordArray[i];
+
+                if (numberOfBitsToShift > 0) {
+                        var nextOverflowValue;
+                
+                        nextOverflowValue = (value >>> (32 - numberOfBitsToShift));
+                        value = value & (0xffffffff >>> numberOfBitsToShift);
+                        resultWord = (((value << numberOfBitsToShift) | overflowValue) >>> 0);
+                } else {
+                        resultWord = value;
+                }
+                
+                result[i+numberOfWordsToShift] = resultWord;
+                overflowValue = nextOverflowValue;
+        }
+
+        if (overflowValue != 0) {
+                result[aWordArray.length + numberOfWordsToShift] = overflowValue;
+        }
+
+        return result;
+};
+
+Clipperz.Crypto.ECC.BinaryField.Value._bitSize = function(aWordArray) {
+                varresult;
+                varnotNullElements;
+        var mostValuableWord;
+        var matchingBitsInMostImportantWord;
+        var mask;
+        var i,c;
+
+        notNullElements = aWordArray.length;
+        
+        if ((aWordArray.length == 1) && (aWordArray[0] == 0)) {
+                result = 0;
+        } else {
+                        notNullElements --;
+                while((notNullElements > 0) && (aWordArray[notNullElements] == 0)) {
+                        notNullElements --;
+                }
+        
+                result = notNullElements * 32;
+                mostValuableWord = aWordArray[notNullElements];
+
+                matchingBits = 32;
+                mask = 0x80000000;
+        
+                while ((matchingBits > 0) && ((mostValuableWord & mask) == 0)) {
+                        matchingBits --;
+                        mask >>>= 1;
+                }
+        
+                result += matchingBits;
+        }
+        
+        return result;
+};
+
+Clipperz.Crypto.ECC.BinaryField.Value._isBitSet = function(aWordArray, aBitPosition) {
+        var result;
+                varbyteIndex;
+        var bitIndexInSelectedByte;
+
+        byteIndex = Math.floor(aBitPosition / 32);
+        bitIndexInSelectedByte = aBitPosition % 32;
+        
+        if (byteIndex <= aWordArray.length) {
+                result = ((aWordArray[byteIndex] & (1 << bitIndexInSelectedByte)) != 0);
+        } else {
+                result = false;
+        }
+
+        return result;
+};
+
+Clipperz.Crypto.ECC.BinaryField.Value._compare = function(a,b) {
+                varresult;
+        var i,c;
+        
+        result = MochiKit.Base.compare(a.length, b.length);
+
+        c = a.length;
+        for (i=0; (i<c) && (result==0); i++) {
+//console.log("compare[" + c + " - " + i + " - 1] " + this.value()[c-i-1] + ", " + aValue.value()[c-i-1]);
+        //      result = MochiKit.Base.compare(this.value()[c-i-1], aValue.value()[c-i-1]);
+                result = MochiKit.Base.compare(a[c-i-1], b[c-i-1]);
+        }
+        
+        return result;
+};
+
+
+Clipperz.Crypto.ECC.BinaryField.Value['exception']= {
+                'UnsupportedBase':                              new MochiKit.Base.NamedError("Clipperz.Crypto.ECC.BinaryField.Value.exception.UnsupportedBase"),
+                'UnsupportedConstructorValueType':new MochiKit.Base.NamedError("Clipperz.Crypto.ECC.BinaryField.Value.exception.UnsupportedConstructorValueType")
+};