From ef68436ac04da078ffdcacd7e1f785473a303d45 Mon Sep 17 00:00:00 2001
From: Giulio Cesare Solaroli <giulio.cesare@clipperz.com>
Date: Sun, 02 Oct 2011 23:56:18 +0000
Subject: First version of the newly restructured repository

---
(limited to 'frontend/gamma/js/Clipperz/Crypto/ECC/BinaryField/Value.js')

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) {
+		var	value;
+		var	stringLength;
+		var numberOfWords;
+		var	i,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++) {
+			var	word;
+		
+			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) {
+		var	result;
+		var i,c;
+		
+		if (aBase != 16) {
+			throw Clipperz.Crypto.ECC.BinaryField.Value.exception.UnsupportedBase;
+		}
+		
+		result = "";
+		c = this.wordSize();
+		for (i=0; i<c; i++) {
+			var	wordAsString;
+			
+//			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;
+	var	numberOfBitsToShift;
+	var result;
+	var	overflowValue;
+	var nextOverflowValue;
+	var	i,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++) {
+		var	value;
+		var	resultWord;
+
+//		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;
+	var	numberOfBitsToShift;
+	var result;
+	var	overflowValue;
+	var	i,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++) {
+		var	value;
+		var	resultWord;
+
+//		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) {
+	var	result;
+	var	notNullElements;
+	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;
+	var	byteIndex;
+	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) {
+	var	result;
+	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")
+};
--
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