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/*
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* Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.security.cert;
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import java.security.AccessController;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.NoSuchAlgorithmException;
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import java.security.NoSuchProviderException;
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import java.security.PrivilegedAction;
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import java.security.Provider;
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import java.security.Security;
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import java.util.Collection;
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import sun.security.jca.*;
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import sun.security.jca.GetInstance.Instance;
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/**
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* A class for retrieving <code>Certificate</code>s and <code>CRL</code>s
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* from a repository.
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* <p>
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* This class uses a provider-based architecture.
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* To create a <code>CertStore</code>, call one of the static
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* <code>getInstance</code> methods, passing in the type of
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* <code>CertStore</code> desired, any applicable initialization parameters
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* and optionally the name of the provider desired.
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* <p>
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* Once the <code>CertStore</code> has been created, it can be used to
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* retrieve <code>Certificate</code>s and <code>CRL</code>s by calling its
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* {@link #getCertificates(CertSelector selector) getCertificates} and
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* {@link #getCRLs(CRLSelector selector) getCRLs} methods.
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* <p>
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* Unlike a {@link java.security.KeyStore KeyStore}, which provides access
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* to a cache of private keys and trusted certificates, a
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* <code>CertStore</code> is designed to provide access to a potentially
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* vast repository of untrusted certificates and CRLs. For example, an LDAP
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* implementation of <code>CertStore</code> provides access to certificates
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* and CRLs stored in one or more directories using the LDAP protocol and the
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* schema as defined in the RFC service attribute. See Appendix A in the
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* <a href= "../../../../technotes/guides/security/certpath/CertPathProgGuide.html#AppA">
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* Java Certification Path API Programmer's Guide</a> for more information about
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* standard <code>CertStore</code> types.
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* <p>
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* <b>Concurrent Access</b>
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* <p>
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* All public methods of <code>CertStore</code> objects must be thread-safe.
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* That is, multiple threads may concurrently invoke these methods on a
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* single <code>CertStore</code> object (or more than one) with no
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* ill effects. This allows a <code>CertPathBuilder</code> to search for a
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* CRL while simultaneously searching for further certificates, for instance.
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* <p>
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* The static methods of this class are also guaranteed to be thread-safe.
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* Multiple threads may concurrently invoke the static methods defined in
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* this class with no ill effects.
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*
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* @since 1.4
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* @author Sean Mullan, Steve Hanna
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*/
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public class CertStore {
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/*
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* Constant to lookup in the Security properties file to determine
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* the default certstore type. In the Security properties file, the
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* default certstore type is given as:
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* <pre>
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* certstore.type=LDAP
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* </pre>
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*/
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private static final String CERTSTORE_TYPE = "certstore.type";
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private CertStoreSpi storeSpi;
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private Provider provider;
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private String type;
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private CertStoreParameters params;
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/**
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* Creates a <code>CertStore</code> object of the given type, and
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* encapsulates the given provider implementation (SPI object) in it.
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*
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* @param storeSpi the provider implementation
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* @param provider the provider
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* @param type the type
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* @param params the initialization parameters (may be <code>null</code>)
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*/
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protected CertStore(CertStoreSpi storeSpi, Provider provider,
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String type, CertStoreParameters params) {
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this.storeSpi = storeSpi;
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this.provider = provider;
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this.type = type;
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if (params != null)
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this.params = (CertStoreParameters) params.clone();
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}
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/**
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* Returns a <code>Collection</code> of <code>Certificate</code>s that
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* match the specified selector. If no <code>Certificate</code>s
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* match the selector, an empty <code>Collection</code> will be returned.
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* <p>
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* For some <code>CertStore</code> types, the resulting
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* <code>Collection</code> may not contain <b>all</b> of the
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* <code>Certificate</code>s that match the selector. For instance,
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* an LDAP <code>CertStore</code> may not search all entries in the
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* directory. Instead, it may just search entries that are likely to
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* contain the <code>Certificate</code>s it is looking for.
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* <p>
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* Some <code>CertStore</code> implementations (especially LDAP
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* <code>CertStore</code>s) may throw a <code>CertStoreException</code>
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* unless a non-null <code>CertSelector</code> is provided that
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* includes specific criteria that can be used to find the certificates.
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* Issuer and/or subject names are especially useful criteria.
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*
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* @param selector A <code>CertSelector</code> used to select which
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* <code>Certificate</code>s should be returned. Specify <code>null</code>
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* to return all <code>Certificate</code>s (if supported).
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* @return A <code>Collection</code> of <code>Certificate</code>s that
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* match the specified selector (never <code>null</code>)
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* @throws CertStoreException if an exception occurs
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*/
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public final Collection<? extends Certificate> getCertificates
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(CertSelector selector) throws CertStoreException {
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return storeSpi.engineGetCertificates(selector);
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}
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/**
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* Returns a <code>Collection</code> of <code>CRL</code>s that
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* match the specified selector. If no <code>CRL</code>s
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* match the selector, an empty <code>Collection</code> will be returned.
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* <p>
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* For some <code>CertStore</code> types, the resulting
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* <code>Collection</code> may not contain <b>all</b> of the
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* <code>CRL</code>s that match the selector. For instance,
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* an LDAP <code>CertStore</code> may not search all entries in the
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* directory. Instead, it may just search entries that are likely to
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* contain the <code>CRL</code>s it is looking for.
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* <p>
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* Some <code>CertStore</code> implementations (especially LDAP
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* <code>CertStore</code>s) may throw a <code>CertStoreException</code>
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* unless a non-null <code>CRLSelector</code> is provided that
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* includes specific criteria that can be used to find the CRLs.
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* Issuer names and/or the certificate to be checked are especially useful.
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*
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* @param selector A <code>CRLSelector</code> used to select which
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* <code>CRL</code>s should be returned. Specify <code>null</code>
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* to return all <code>CRL</code>s (if supported).
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* @return A <code>Collection</code> of <code>CRL</code>s that
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* match the specified selector (never <code>null</code>)
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* @throws CertStoreException if an exception occurs
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*/
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public final Collection<? extends CRL> getCRLs(CRLSelector selector)
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throws CertStoreException {
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return storeSpi.engineGetCRLs(selector);
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}
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/**
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* Returns a <code>CertStore</code> object that implements the specified
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* <code>CertStore</code> type and is initialized with the specified
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* parameters.
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*
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* <p> This method traverses the list of registered security Providers,
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* starting with the most preferred Provider.
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* A new CertStore object encapsulating the
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* CertStoreSpi implementation from the first
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* Provider that supports the specified type is returned.
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*
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* <p> Note that the list of registered providers may be retrieved via
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* the {@link Security#getProviders() Security.getProviders()} method.
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*
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* <p>The <code>CertStore</code> that is returned is initialized with the
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* specified <code>CertStoreParameters</code>. The type of parameters
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* needed may vary between different types of <code>CertStore</code>s.
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* Note that the specified <code>CertStoreParameters</code> object is
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* cloned.
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*
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* @param type the name of the requested <code>CertStore</code> type.
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* See Appendix A in the <a href=
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* "../../../../technotes/guides/security/certpath/CertPathProgGuide.html#AppA">
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* Java Certification Path API Programmer's Guide </a>
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* for information about standard types.
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*
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* @param params the initialization parameters (may be <code>null</code>).
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*
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* @return a <code>CertStore</code> object that implements the specified
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* <code>CertStore</code> type.
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*
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* @throws NoSuchAlgorithmException if no Provider supports a
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* CertStoreSpi implementation for the specified type.
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*
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* @throws InvalidAlgorithmParameterException if the specified
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* initialization parameters are inappropriate for this
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* <code>CertStore</code>.
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*
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* @see java.security.Provider
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*/
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public static CertStore getInstance(String type, CertStoreParameters params)
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throws InvalidAlgorithmParameterException,
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NoSuchAlgorithmException {
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try {
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Instance instance = GetInstance.getInstance("CertStore",
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CertStoreSpi.class, type, params);
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return new CertStore((CertStoreSpi)instance.impl,
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instance.provider, type, params);
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} catch (NoSuchAlgorithmException e) {
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return handleException(e);
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}
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}
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private static CertStore handleException(NoSuchAlgorithmException e)
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throws NoSuchAlgorithmException, InvalidAlgorithmParameterException {
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Throwable cause = e.getCause();
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if (cause instanceof InvalidAlgorithmParameterException) {
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throw (InvalidAlgorithmParameterException)cause;
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}
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throw e;
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}
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/**
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* Returns a <code>CertStore</code> object that implements the specified
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* <code>CertStore</code> type.
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*
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* <p> A new CertStore object encapsulating the
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* CertStoreSpi implementation from the specified provider
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* is returned. The specified provider must be registered
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* in the security provider list.
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*
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* <p> Note that the list of registered providers may be retrieved via
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* the {@link Security#getProviders() Security.getProviders()} method.
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*
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* <p>The <code>CertStore</code> that is returned is initialized with the
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* specified <code>CertStoreParameters</code>. The type of parameters
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* needed may vary between different types of <code>CertStore</code>s.
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* Note that the specified <code>CertStoreParameters</code> object is
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* cloned.
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*
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* @param type the requested <code>CertStore</code> type.
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* See Appendix A in the <a href=
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* "../../../../technotes/guides/security/certpath/CertPathProgGuide.html#AppA">
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* Java Certification Path API Programmer's Guide </a>
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* for information about standard types.
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*
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* @param params the initialization parameters (may be <code>null</code>).
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*
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* @param provider the name of the provider.
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*
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* @return a <code>CertStore</code> object that implements the
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* specified type.
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*
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* @throws NoSuchAlgorithmException if a CertStoreSpi
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* implementation for the specified type is not
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* available from the specified provider.
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*
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* @throws InvalidAlgorithmParameterException if the specified
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* initialization parameters are inappropriate for this
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* <code>CertStore</code>.
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*
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* @throws NoSuchProviderException if the specified provider is not
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* registered in the security provider list.
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*
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* @exception IllegalArgumentException if the <code>provider</code> is
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* null or empty.
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*
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* @see java.security.Provider
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*/
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public static CertStore getInstance(String type,
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CertStoreParameters params, String provider)
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throws InvalidAlgorithmParameterException,
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NoSuchAlgorithmException, NoSuchProviderException {
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try {
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Instance instance = GetInstance.getInstance("CertStore",
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CertStoreSpi.class, type, params, provider);
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return new CertStore((CertStoreSpi)instance.impl,
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instance.provider, type, params);
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} catch (NoSuchAlgorithmException e) {
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return handleException(e);
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}
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}
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/**
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* Returns a <code>CertStore</code> object that implements the specified
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* <code>CertStore</code> type.
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*
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* <p> A new CertStore object encapsulating the
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* CertStoreSpi implementation from the specified Provider
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* object is returned. Note that the specified Provider object
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* does not have to be registered in the provider list.
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*
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* <p>The <code>CertStore</code> that is returned is initialized with the
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* specified <code>CertStoreParameters</code>. The type of parameters
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* needed may vary between different types of <code>CertStore</code>s.
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* Note that the specified <code>CertStoreParameters</code> object is
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* cloned.
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*
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* @param type the requested <code>CertStore</code> type.
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* See Appendix A in the <a href=
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* "../../../../technotes/guides/security/certpath/CertPathProgGuide.html#AppA">
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* Java Certification Path API Programmer's Guide </a>
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* for information about standard types.
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*
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* @param params the initialization parameters (may be <code>null</code>).
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*
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* @param provider the provider.
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*
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* @return a <code>CertStore</code> object that implements the
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* specified type.
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*
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* @exception NoSuchAlgorithmException if a CertStoreSpi
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* implementation for the specified type is not available
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* from the specified Provider object.
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*
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* @throws InvalidAlgorithmParameterException if the specified
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* initialization parameters are inappropriate for this
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* <code>CertStore</code>
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*
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* @exception IllegalArgumentException if the <code>provider</code> is
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* null.
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*
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* @see java.security.Provider
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*/
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public static CertStore getInstance(String type, CertStoreParameters params,
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Provider provider) throws NoSuchAlgorithmException,
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InvalidAlgorithmParameterException {
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try {
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Instance instance = GetInstance.getInstance("CertStore",
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CertStoreSpi.class, type, params, provider);
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return new CertStore((CertStoreSpi)instance.impl,
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instance.provider, type, params);
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} catch (NoSuchAlgorithmException e) {
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return handleException(e);
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}
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}
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/**
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* Returns the parameters used to initialize this <code>CertStore</code>.
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* Note that the <code>CertStoreParameters</code> object is cloned before
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* it is returned.
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*
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* @return the parameters used to initialize this <code>CertStore</code>
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* (may be <code>null</code>)
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*/
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public final CertStoreParameters getCertStoreParameters() {
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return (params == null ? null : (CertStoreParameters) params.clone());
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}
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/**
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* Returns the type of this <code>CertStore</code>.
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*
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* @return the type of this <code>CertStore</code>
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*/
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public final String getType() {
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return this.type;
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}
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/**
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* Returns the provider of this <code>CertStore</code>.
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*
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* @return the provider of this <code>CertStore</code>
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*/
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public final Provider getProvider() {
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return this.provider;
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}
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/**
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* Returns the default <code>CertStore</code> type as specified in the
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* Java security properties file, or the string "LDAP" if no
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384 |
* such property exists. The Java security properties file is located in
|
|
385 |
* the file named <JAVA_HOME>/lib/security/java.security.
|
|
386 |
* <JAVA_HOME> refers to the value of the java.home system property,
|
|
387 |
* and specifies the directory where the JRE is installed.
|
|
388 |
*
|
|
389 |
* <p>The default <code>CertStore</code> type can be used by applications
|
|
390 |
* that do not want to use a hard-coded type when calling one of the
|
|
391 |
* <code>getInstance</code> methods, and want to provide a default
|
|
392 |
* <code>CertStore</code> type in case a user does not specify its own.
|
|
393 |
*
|
|
394 |
* <p>The default <code>CertStore</code> type can be changed by setting
|
|
395 |
* the value of the "certstore.type" security property (in the Java
|
|
396 |
* security properties file) to the desired type.
|
|
397 |
*
|
|
398 |
* @return the default <code>CertStore</code> type as specified in the
|
|
399 |
* Java security properties file, or the string "LDAP"
|
|
400 |
* if no such property exists.
|
|
401 |
*/
|
|
402 |
public final static String getDefaultType() {
|
|
403 |
String cstype;
|
|
404 |
cstype = AccessController.doPrivileged(new PrivilegedAction<String>() {
|
|
405 |
public String run() {
|
|
406 |
return Security.getProperty(CERTSTORE_TYPE);
|
|
407 |
}
|
|
408 |
});
|
|
409 |
if (cstype == null) {
|
|
410 |
cstype = "LDAP";
|
|
411 |
}
|
|
412 |
return cstype;
|
|
413 |
}
|
|
414 |
}
|