Initial checking of Mark Benvenuto's security code

1 files changed, 195 insertions, 0 deletions

diff --git a/java/security/AlgorithmParameterGenerator.java b/java/security/AlgorithmParameterGenerator.java
new file mode 100644
index 000000000..0936c1237
--- /dev/null
+++ b/java/security/AlgorithmParameterGenerator.java
@@ -0,0 +1,195 @@
+/* AlgorithmParameterGenerator.java --- Algorithm Parameter Generator

+   

+  Copyright (c) 1999 by Free Software Foundation, Inc.

+  Written by Mark Benvenuto <ivymccough@worldnet.att.net>

+

+  This program is free software; you can redistribute it and/or modify

+  it under the terms of the GNU Library General Public License as published 

+  by the Free Software Foundation, version 2. (see COPYING.LIB)

+

+  This program 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 General Public License for more details.

+

+  You should have received a copy of the GNU General Public License

+  along with this program; if not, write to the Free Software Foundation

+  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA. */

+

+package java.security;

+import java.security.spec.AlgorithmParameterSpec;

+

+/**

+	AlgorithmParameterGenerator is used to generate 

+	algorithm parameters for specified algorithms.

+	This class is used to generate the algorithm parameters

+	for a specific algorithm.

+

+	@since JDK 1.2

+

+	@author Mark Benvenuto

+*/

+public class AlgorithmParameterGenerator

+{

+private AlgorithmParameterGeneratorSpi paramGenSpi;

+private Provider provider;

+private String algorithm;

+

+/**

+	Creates an instance of AlgorithmParameters

+

+	@param paramSpi A parameters engine to use

+	@param provider A provider to use

+	@param algorithm The algorithm 

+*/

+protected AlgorithmParameterGenerator(AlgorithmParameterGeneratorSpi paramGenSpi, Provider provider, String algorithm)

+{

+	this.paramGenSpi = paramGenSpi;

+	this.provider = provider;

+	this.algorithm = algorithm;

+}

+

+/**

+	Returns the name of the algorithm used

+

+	@return A string with the name of the algorithm

+*/

+public final String getAlgorithm()

+{

+	return algorithm;

+}

+

+/** 

+	Gets an instance of the AlgorithmParameterGenerator class 

+	which generates algorithm parameters for the specified algorithm. 

+	If the algorithm is not found then, it throws NoSuchAlgorithmException.

+

+	@param algorithm the name of algorithm to choose

+	@return a AlgorithmParameterGenerator repesenting the desired algorithm

+

+	@throws NoSuchAlgorithmException if the algorithm is not implemented by providers

+*/

+public static AlgorithmParameterGenerator getInstance(String algorithm)

+	throws NoSuchAlgorithmException

+{

+    Provider[] p = Security.getProviders ();

+

+    for (int i = 0; i < p.length; i++)

+    {

+      String classname = p[i].getProperty ("AlgorithmParameterGenerator." + algorithm);

+      if (classname != null)

+	return getInstance (classname, algorithm, p[i]);

+    }

+

+    throw new NoSuchAlgorithmException (algorithm);

+}

+

+/** 

+	Gets an instance of the AlgorithmParameterGenerator class 

+	which generates algorithm parameters for the specified algorithm. 

+	If the algorithm is not found then, it throws NoSuchAlgorithmException.

+

+	@param algorithm the name of algorithm to choose

+	@param provider the name of the provider to find the algorithm in

+	@return a AlgorithmParameterGenerator repesenting the desired algorithm

+

+	@throws NoSuchAlgorithmException if the algorithm is not implemented by the provider

+	@throws NoSuchProviderException if the provider is not found

+*/

+public static AlgorithmParameterGenerator getInstance(String algorithm, String provider) 

+	throws NoSuchAlgorithmException, NoSuchProviderException

+{

+	Provider p = Security.getProvider(provider);

+	if( p == null)

+		throw new NoSuchProviderException();

+

+    return getInstance (p.getProperty ("AlgorithmParameterGenerator." + algorithm),

+			algorithm, p);

+}

+

+private static AlgorithmParameterGenerator getInstance (String classname,

+					String algorithm,

+					Provider provider)

+	throws NoSuchAlgorithmException

+{

+

+	try {

+                return new AlgorithmParameterGenerator( (AlgorithmParameterGeneratorSpi )Class.forName( classname ).newInstance(), provider, algorithm );

+	} catch( ClassNotFoundException cnfe) {

+		throw new NoSuchAlgorithmException("Class not found");

+	} catch( InstantiationException ie) {

+		throw new NoSuchAlgorithmException("Class instantiation failed");

+	} catch( IllegalAccessException iae) {

+		throw new NoSuchAlgorithmException("Illegal Access");

+	}

+}

+

+/**

+	Gets the provider that the class is from.

+

+	@return the provider of this class

+*/

+public final Provider getProvider()

+{

+	return provider;

+}

+

+/**

+	Initializes the Algorithm Parameter Generator with the specified

+	size. (Since no source of randomness is supplied, a default

+	one is supplied).

+

+	@param size size (in bits) to use

+*/

+public final void init(int size)

+{

+	init( size, new SecureRandom() );

+}

+

+/**

+	Initializes the Algorithm Parameter Generator with the specified

+	size and source of randomness.

+

+	@param size size (in bits) to use

+	@param random source of randomness to use

+*/

+public final void init(int size, SecureRandom random)

+{

+	paramGenSpi.engineInit( size, random );

+}

+

+/**

+	Initializes the Algorithm Parameter Generator with the specified

+	AlgorithmParameterSpec. (Since no source of randomness is supplied, 

+	a default one is supplied).

+

+	@param genParamSpec the AlgorithmParameterSpec class to use

+*/

+public final void init(AlgorithmParameterSpec genParamSpec) throws InvalidAlgorithmParameterException

+{

+	init( genParamSpec, new SecureRandom() );

+}

+

+/**

+	Initializes the Algorithm Parameter Generator with the specified

+	AlgorithmParameterSpec and source of randomness.

+

+	@param genParamSpec the AlgorithmParameterSpec class to use

+	@param random source of randomness to use

+*/

+public final void init(AlgorithmParameterSpec genParamSpec, SecureRandom random) throws InvalidAlgorithmParameterException

+{

+	paramGenSpi.engineInit( genParamSpec, random );

+}

+

+/**

+	Generate a new set of AlgorithmParameters.

+

+	@returns a new set of algorithm parameters

+*/

+public final AlgorithmParameters generateParameters()

+{

+	return paramGenSpi.engineGenerateParameters();

+}

+

+}