From 541bb378ddece2eab135a8066a16994e94436dea Mon Sep 17 00:00:00 2001
From: Giulio Cesare Solaroli <giulio.cesare@solaroli.it>
Date: Mon, 03 Oct 2011 16:04:12 +0000
Subject: Merge pull request #1 from gcsolaroli/master

First version of the restructured repository
---
(limited to 'frontend/gamma/js/Clipperz/Crypto/RSA.js')

diff --git a/frontend/gamma/js/Clipperz/Crypto/RSA.js b/frontend/gamma/js/Clipperz/Crypto/RSA.js
new file mode 100644
index 0000000..4dad8f7
--- a/dev/null
+++ b/frontend/gamma/js/Clipperz/Crypto/RSA.js
@@ -0,0 +1,151 @@
+/*
+
+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.Crypto.BigInt) == 'undefined') { throw ""; }} catch (e) {
+	throw "Clipperz.Crypto.RSA depends on Clipperz.Crypto.BigInt!";
+}  
+
+if (typeof(Clipperz.Crypto.RSA) == 'undefined') { Clipperz.Crypto.RSA = {}; }
+
+Clipperz.Crypto.RSA.VERSION = "0.1";
+Clipperz.Crypto.RSA.NAME = "Clipperz.RSA";
+
+//#############################################################################
+
+MochiKit.Base.update(Clipperz.Crypto.RSA, {
+
+	//-------------------------------------------------------------------------
+
+	'publicKeyWithValues': function (e, d, n) {
+		var	result;
+		
+		result = {};
+
+		if (e.isBigInt) {
+			result.e = e;
+		} else {
+			result.e = new Clipperz.Crypto.BigInt(e, 16);
+		}
+		
+		if (d.isBigInt) {
+			result.d = d;
+		} else {
+			result.d = new Clipperz.Crypto.BigInt(d, 16);
+		}
+		
+		if (n.isBigInt) {
+			result.n = n;
+		} else {
+			result.n = new Clipperz.Crypto.BigInt(n, 16);
+		}
+		
+		return result;
+	},
+
+	'privateKeyWithValues': function(e, d, n) {
+		return Clipperz.Crypto.RSA.publicKeyWithValues(e, d, n);
+	},
+
+	//-----------------------------------------------------------------------------
+
+	'encryptUsingPublicKey': function (aKey, aMessage) {
+		var	messageValue;
+		var	result;
+		
+		messageValue = new Clipperz.Crypto.BigInt(aMessage, 16);
+		result = messageValue.powerModule(aKey.e, aKey.n);
+		
+		return result.asString(16);
+	},
+
+	//.............................................................................
+
+	'decryptUsingPublicKey': function (aKey, aMessage) {
+		return Clipperz.Crypto.RSA.encryptUsingPublicKey(aKey, aMessage);
+	},
+
+	//-----------------------------------------------------------------------------
+
+	'encryptUsingPrivateKey': function (aKey, aMessage) {
+		var	messageValue;
+		var	result;
+		
+		messageValue = new Clipperz.Crypto.BigInt(aMessage, 16);
+		result = messageValue.powerModule(aKey.d, aKey.n);
+		
+		return result.asString(16);
+	},
+
+	//.............................................................................
+
+	'decryptUsingPrivateKey': function (aKey, aMessage) {
+		return Clipperz.Crypto.RSA.encryptUsingPrivateKey(aKey, aMessage);
+	},
+
+	//-----------------------------------------------------------------------------
+	
+	'generatePublicKey': function(aNumberOfBits) {
+		var	result;
+		var	e;
+		var	d;
+		var	n;
+		
+		e = new Clipperz.Crypto.BigInt("10001", 16);
+
+		{
+			var p, q;
+			var	phi;
+
+			do {
+				p = Clipperz.Crypto.BigInt.randomPrime(aNumberOfBits);
+			} while (p.module(e).equals(1));
+			
+			do {
+				q = Clipperz.Crypto.BigInt.randomPrime(aNumberOfBits);
+			} while ((q.equals(p)) || (q.module(e).equals(1)));
+
+			n = p.multiply(q);
+			phi = (p.subtract(1).multiply(q.subtract(1)));
+			d = e.powerModule(-1, phi);
+		}
+		
+		result = Clipperz.Crypto.RSA.publicKeyWithValues(e, d, n);
+		
+		return result;
+	},
+
+	//-------------------------------------------------------------------------
+
+	__syntaxFix__: "syntax fix"
+	
+	//-------------------------------------------------------------------------
+
+});
+
+//#############################################################################
+
--
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