250 lines
8.4 KiB
Java
250 lines
8.4 KiB
Java
/* CertPathBuilder.java -- bulids CertPath objects from Certificates.
|
|
Copyright (C) 2003, 2004 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package java.security.cert;
|
|
|
|
import gnu.java.security.Engine;
|
|
|
|
import java.lang.reflect.InvocationTargetException;
|
|
import java.security.InvalidAlgorithmParameterException;
|
|
import java.security.NoSuchAlgorithmException;
|
|
import java.security.NoSuchProviderException;
|
|
import java.security.Provider;
|
|
import java.security.Security;
|
|
|
|
/**
|
|
* This class builds certificate paths (also called certificate chains),
|
|
* which can be used to establish trust for a particular certificate by
|
|
* building a path from a trusted certificate (a trust anchor) to the
|
|
* untrusted certificate.
|
|
*
|
|
* @see CertPath
|
|
*/
|
|
public class CertPathBuilder
|
|
{
|
|
|
|
// Constants and fields.
|
|
// ------------------------------------------------------------------------
|
|
|
|
/** Service name for CertPathBuilder. */
|
|
private static final String CERT_PATH_BUILDER = "CertPathBuilder";
|
|
|
|
/** The underlying implementation. */
|
|
private CertPathBuilderSpi cpbSpi;
|
|
|
|
/** The provider of this implementation. */
|
|
private Provider provider;
|
|
|
|
/** The name of this implementation. */
|
|
private String algorithm;
|
|
|
|
// Constructor.
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Creates a new CertPathBuilder.
|
|
*
|
|
* @param cpbSpi The underlying implementation.
|
|
* @param provider The provider of the implementation.
|
|
* @param algorithm This implementation's name.
|
|
*/
|
|
protected CertPathBuilder(CertPathBuilderSpi cpbSpi, Provider provider,
|
|
String algorithm)
|
|
{
|
|
this.cpbSpi = cpbSpi;
|
|
this.provider = provider;
|
|
this.algorithm = algorithm;
|
|
}
|
|
|
|
// Class methods.
|
|
// ------------------------------------------------------------------------
|
|
|
|
/**
|
|
* Get the default cert path builder type.
|
|
*
|
|
* <p>This value can be set at run-time by the security property
|
|
* <code>"certpathbuilder.type"</code>. If this property is not set,
|
|
* then the value returned is <code>"PKIX"</code>.
|
|
*
|
|
* @return The default CertPathBuilder algorithm.
|
|
*/
|
|
public static final String getDefaultType()
|
|
{
|
|
String type = Security.getProperty("certpathbuilder.type");
|
|
if (type == null)
|
|
type = "PKIX";
|
|
return type;
|
|
}
|
|
|
|
/**
|
|
* Returns an instance of a named <code>CertPathBuilder</code> from the
|
|
* first provider that implements it.
|
|
*
|
|
* @param algorithm The name of the <code>CertPathBuilder</code> to create.
|
|
* @return The new instance.
|
|
* @throws NoSuchAlgorithmException If no installed provider implements the
|
|
* named algorithm.
|
|
* @throws IllegalArgumentException if <code>algorithm</code> is
|
|
* <code>null</code> or is an empty string.
|
|
*/
|
|
public static CertPathBuilder getInstance(String algorithm)
|
|
throws NoSuchAlgorithmException
|
|
{
|
|
Provider[] p = Security.getProviders();
|
|
NoSuchAlgorithmException lastException = null;
|
|
for (int i = 0; i < p.length; i++)
|
|
try
|
|
{
|
|
return getInstance(algorithm, p[i]);
|
|
}
|
|
catch (NoSuchAlgorithmException x)
|
|
{
|
|
lastException = x;
|
|
}
|
|
if (lastException != null)
|
|
throw lastException;
|
|
throw new NoSuchAlgorithmException(algorithm);
|
|
}
|
|
|
|
/**
|
|
* Returns an instance of a named <code>CertPathBuilder</code> from a named
|
|
* provider.
|
|
*
|
|
* @param algorithm The name of the <code>CertPathBuilder</code> to create.
|
|
* @param provider The name of the provider to use.
|
|
* @return The new instance.
|
|
* @throws NoSuchAlgorithmException If no installed provider implements the
|
|
* named algorithm.
|
|
* @throws NoSuchProviderException If the named provider does not exist.
|
|
* @throws IllegalArgumentException if either <code>algorithm</code> or
|
|
* <code>provider</code> is <code>null</code>, or if
|
|
* <code>algorithm</code> is an empty string.
|
|
*/
|
|
public static CertPathBuilder getInstance(String algorithm, String provider)
|
|
throws NoSuchAlgorithmException, NoSuchProviderException
|
|
{
|
|
if (provider == null)
|
|
throw new IllegalArgumentException("provider MUST NOT be null");
|
|
Provider p = Security.getProvider(provider);
|
|
if (p == null)
|
|
throw new NoSuchProviderException(provider);
|
|
return getInstance(algorithm, p);
|
|
}
|
|
|
|
/**
|
|
* Returns an instance of a named <code>CertPathBuilder</code> from the
|
|
* specified provider.
|
|
*
|
|
* @param algorithm The name of the <code>CertPathBuilder</code> to create.
|
|
* @param provider The provider to use.
|
|
* @return The new instance.
|
|
* @throws NoSuchAlgorithmException If no installed provider implements the
|
|
* named algorithm.
|
|
* @throws IllegalArgumentException if either <code>algorithm</code> or
|
|
* <code>provider</code> is <code>null</code>, or if
|
|
* <code>algorithm</code> is an empty string.
|
|
*/
|
|
public static CertPathBuilder getInstance(String algorithm, Provider provider)
|
|
throws NoSuchAlgorithmException
|
|
{
|
|
StringBuilder sb = new StringBuilder("CertPathBuilder for algorithm [")
|
|
.append(algorithm).append("] from provider[")
|
|
.append(provider).append("] could not be created");
|
|
Throwable cause;
|
|
try
|
|
{
|
|
Object spi = Engine.getInstance(CERT_PATH_BUILDER, algorithm, provider);
|
|
return new CertPathBuilder((CertPathBuilderSpi) spi, provider, algorithm);
|
|
}
|
|
catch (InvocationTargetException x)
|
|
{
|
|
cause = x.getCause();
|
|
if (cause instanceof NoSuchAlgorithmException)
|
|
throw (NoSuchAlgorithmException) cause;
|
|
if (cause == null)
|
|
cause = x;
|
|
}
|
|
catch (ClassCastException x)
|
|
{
|
|
cause = x;
|
|
}
|
|
NoSuchAlgorithmException x = new NoSuchAlgorithmException(sb.toString());
|
|
x.initCause(cause);
|
|
throw x;
|
|
}
|
|
|
|
/**
|
|
* Return the name of this CertPathBuilder algorithm.
|
|
*
|
|
* @return The algorithm name.
|
|
*/
|
|
public final String getAlgorithm()
|
|
{
|
|
return algorithm;
|
|
}
|
|
|
|
/**
|
|
* Return the provider of this instance's implementation.
|
|
*
|
|
* @return The provider.
|
|
*/
|
|
public final Provider getProvider()
|
|
{
|
|
return provider;
|
|
}
|
|
|
|
/**
|
|
* Builds a certificate path. The {@link CertPathParameters} parameter
|
|
* passed to this method is implementation-specific, but in general
|
|
* should contain some number of certificates and some number of
|
|
* trusted certificates (or "trust anchors").
|
|
*
|
|
* @param params The parameters.
|
|
* @retrun The certificate path result.
|
|
* @throws CertPathBuilderException If the certificate path cannot be
|
|
* built.
|
|
* @throws InvalidAlgorithmParameterException If the implementation
|
|
* rejects the specified parameters.
|
|
*/
|
|
public final CertPathBuilderResult build(CertPathParameters params)
|
|
throws CertPathBuilderException, InvalidAlgorithmParameterException
|
|
{
|
|
return cpbSpi.engineBuild(params);
|
|
}
|
|
}
|