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jeremybenn |
/* SRPTrustManagerFactory.java -- trust manager for SRP.
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is a part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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USA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.javax.net.ssl.provider;
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import java.io.IOException;
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import java.math.BigInteger;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.KeyPair;
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import java.security.KeyStore;
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import java.util.HashMap;
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import javax.net.ssl.ManagerFactoryParameters;
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import javax.net.ssl.TrustManager;
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import javax.net.ssl.TrustManagerFactorySpi;
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import gnu.java.security.key.IKeyPairGenerator;
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import gnu.javax.crypto.key.srp6.SRPKeyPairGenerator;
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import gnu.javax.crypto.sasl.srp.PasswordFile;
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import gnu.javax.crypto.sasl.srp.SRP;
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import gnu.javax.net.ssl.SRPManagerParameters;
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import gnu.javax.net.ssl.SRPTrustManager;
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/**
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* This is an implementation of a {@link javax.net.ssl.TrustManagerFactory}
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* engine for the ``SRP'' algorithm. You must initialize instances of this
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* algorithm with {@link SRPManagerParameters}.
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*/
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public class SRPTrustManagerFactory extends TrustManagerFactorySpi
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{
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// Field.
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// -------------------------------------------------------------------------
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private Manager current;
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// Constructor.
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// -------------------------------------------------------------------------
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public SRPTrustManagerFactory()
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{
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super();
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}
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// Instance methods.
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// -------------------------------------------------------------------------
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protected TrustManager[] engineGetTrustManagers()
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{
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if (current == null)
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throw new IllegalStateException("not initialized");
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return new TrustManager[] { current };
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}
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protected void engineInit(KeyStore ks)
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{
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throw new IllegalArgumentException("only accepts SRPManagerParameters");
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}
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protected void engineInit(ManagerFactoryParameters params)
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throws InvalidAlgorithmParameterException
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{
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if (params == null)
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{
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try
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{
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String srpPasswd = Util.getSecurityProperty("jessie.srp.password.file");
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if (srpPasswd == null)
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{
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current = new Manager(new PasswordFile());
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return;
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}
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String srpPasswd2 = Util.getSecurityProperty("jessie.srp.password.file2");
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if (srpPasswd2 == null)
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srpPasswd2 = srpPasswd + "2";
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String srpConfig = Util.getSecurityProperty("jessie.srp.config");
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if (srpConfig == null)
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srpConfig = srpPasswd + ".conf";
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current = new Manager(new PasswordFile(srpPasswd, srpPasswd2, srpConfig));
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return;
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}
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catch (IOException ioe)
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{
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throw new InvalidAlgorithmParameterException("default initialization failed: "
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+ ioe.toString());
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}
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}
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if (params instanceof SRPManagerParameters)
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{
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current = new Manager(((SRPManagerParameters) params).getPasswordFile());
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return;
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}
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throw new InvalidAlgorithmParameterException();
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}
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// Inner class.
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// -------------------------------------------------------------------------
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private class Manager implements SRPTrustManager
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{
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// Field.
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// -----------------------------------------------------------------------
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private final PasswordFile file;
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// Constructor.
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// -----------------------------------------------------------------------
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Manager(PasswordFile file)
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{
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this.file = file;
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}
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// Instance methods.
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// -----------------------------------------------------------------------
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public boolean contains(String user)
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{
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try
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{
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return file.contains(user);
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}
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catch (IOException ioe) { }
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return false;
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}
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public KeyPair getKeyPair(String user)
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{
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try
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{
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if (file.contains(user))
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{
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SRP srp = SRP.instance("SHA");
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String[] ent = file.lookup(user, "SHA");
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String[] cnf = file.lookupConfig(ent[2]);
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BigInteger v, N, g;
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v = new BigInteger(1, gnu.java.security.util.Util.fromBase64(ent[0]));
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N = new BigInteger(1, gnu.java.security.util.Util.fromBase64(cnf[0]));
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g = new BigInteger(1, gnu.java.security.util.Util.fromBase64(cnf[1]));
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IKeyPairGenerator kpg = new SRPKeyPairGenerator();
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HashMap attr = new HashMap();
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attr.put(SRPKeyPairGenerator.SHARED_MODULUS, N);
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attr.put(SRPKeyPairGenerator.GENERATOR, g);
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attr.put(SRPKeyPairGenerator.USER_VERIFIER, v);
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kpg.setup(attr);
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return kpg.generate();
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}
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}
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catch (IOException ioe) { }
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return null;
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}
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public byte[] getSalt(String user)
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{
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try
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{
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if (file.contains(user))
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{
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return gnu.java.security.util.Util.fromBase64(file.lookup(user, "SHA")[1]);
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}
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}
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catch (IOException ioe) { }
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return null;
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}
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public BigInteger getVerifier(String user)
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{
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try
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{
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if (file.contains(user))
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{
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return new BigInteger(1,
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gnu.java.security.util.Util.fromBase64(file.lookup(user, "SHA")[0]));
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}
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}
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catch (IOException ioe) { }
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return null;
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}
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public PasswordFile getPasswordFile()
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{
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return file;
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}
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}
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}
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