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⏎ java/security/cert/PKIXRevocationChecker.java
/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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package java.security.cert;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
/**
* A {@code PKIXCertPathChecker} for checking the revocation status of
* certificates with the PKIX algorithm.
*
* <p>A {@code PKIXRevocationChecker} checks the revocation status of
* certificates with the Online Certificate Status Protocol (OCSP) or
* Certificate Revocation Lists (CRLs). OCSP is described in RFC 2560 and
* is a network protocol for determining the status of a certificate. A CRL
* is a time-stamped list identifying revoked certificates, and RFC 5280
* describes an algorithm for determining the revocation status of certificates
* using CRLs.
*
* <p>Each {@code PKIXRevocationChecker} must be able to check the revocation
* status of certificates with OCSP and CRLs. By default, OCSP is the
* preferred mechanism for checking revocation status, with CRLs as the
* fallback mechanism. However, this preference can be switched to CRLs with
* the {@link Option#PREFER_CRLS PREFER_CRLS} option. In addition, the fallback
* mechanism can be disabled with the {@link Option#NO_FALLBACK NO_FALLBACK}
* option.
*
* <p>A {@code PKIXRevocationChecker} is obtained by calling the
* {@link CertPathValidator#getRevocationChecker getRevocationChecker} method
* of a PKIX {@code CertPathValidator}. Additional parameters and options
* specific to revocation can be set (by calling the
* {@link #setOcspResponder setOcspResponder} method for instance). The
* {@code PKIXRevocationChecker} is added to a {@code PKIXParameters} object
* using the {@link PKIXParameters#addCertPathChecker addCertPathChecker}
* or {@link PKIXParameters#setCertPathCheckers setCertPathCheckers} method,
* and then the {@code PKIXParameters} is passed along with the {@code CertPath}
* to be validated to the {@link CertPathValidator#validate validate} method
* of a PKIX {@code CertPathValidator}. When supplying a revocation checker in
* this manner, it will be used to check revocation irrespective of the setting
* of the {@link PKIXParameters#isRevocationEnabled RevocationEnabled} flag.
* Similarly, a {@code PKIXRevocationChecker} may be added to a
* {@code PKIXBuilderParameters} object for use with a PKIX
* {@code CertPathBuilder}.
*
* <p>Note that when a {@code PKIXRevocationChecker} is added to
* {@code PKIXParameters}, it clones the {@code PKIXRevocationChecker};
* thus any subsequent modifications to the {@code PKIXRevocationChecker}
* have no effect.
*
* <p>Any parameter that is not set (or is set to {@code null}) will be set to
* the default value for that parameter.
*
* <p><b>Concurrent Access</b>
*
* <p>Unless otherwise specified, the methods defined in this class are not
* thread-safe. Multiple threads that need to access a single object
* concurrently should synchronize amongst themselves and provide the
* necessary locking. Multiple threads each manipulating separate objects
* need not synchronize.
*
* @since 1.8
*
* @see <a href="http://www.ietf.org/rfc/rfc2560.txt"><i>RFC 2560: X.509
* Internet Public Key Infrastructure Online Certificate Status Protocol -
* OCSP</i></a>, <br><a
* href="http://www.ietf.org/rfc/rfc5280.txt"><i>RFC 5280: Internet X.509
* Public Key Infrastructure Certificate and Certificate Revocation List (CRL)
* Profile</i></a>
*/
public abstract class PKIXRevocationChecker extends PKIXCertPathChecker {
private URI ocspResponder;
private X509Certificate ocspResponderCert;
private List<Extension> ocspExtensions = Collections.<Extension>emptyList();
private Map<X509Certificate, byte[]> ocspResponses = Collections.emptyMap();
private Set<Option> options = Collections.emptySet();
/**
* Default constructor.
*/
protected PKIXRevocationChecker() {}
/**
* Sets the URI that identifies the location of the OCSP responder. This
* overrides the {@code ocsp.responderURL} security property and any
* responder specified in a certificate's Authority Information Access
* Extension, as defined in RFC 5280.
*
* @param uri the responder URI
*/
public void setOcspResponder(URI uri) {
this.ocspResponder = uri;
}
/**
* Gets the URI that identifies the location of the OCSP responder. This
* overrides the {@code ocsp.responderURL} security property. If this
* parameter or the {@code ocsp.responderURL} property is not set, the
* location is determined from the certificate's Authority Information
* Access Extension, as defined in RFC 5280.
*
* @return the responder URI, or {@code null} if not set
*/
public URI getOcspResponder() {
return ocspResponder;
}
/**
* Sets the OCSP responder's certificate. This overrides the
* {@code ocsp.responderCertSubjectName},
* {@code ocsp.responderCertIssuerName},
* and {@code ocsp.responderCertSerialNumber} security properties.
*
* @param cert the responder's certificate
*/
public void setOcspResponderCert(X509Certificate cert) {
this.ocspResponderCert = cert;
}
/**
* Gets the OCSP responder's certificate. This overrides the
* {@code ocsp.responderCertSubjectName},
* {@code ocsp.responderCertIssuerName},
* and {@code ocsp.responderCertSerialNumber} security properties. If this
* parameter or the aforementioned properties are not set, then the
* responder's certificate is determined as specified in RFC 2560.
*
* @return the responder's certificate, or {@code null} if not set
*/
public X509Certificate getOcspResponderCert() {
return ocspResponderCert;
}
// request extensions; single extensions not supported
/**
* Sets the optional OCSP request extensions.
*
* @param extensions a list of extensions. The list is copied to protect
* against subsequent modification.
*/
public void setOcspExtensions(List<Extension> extensions)
{
this.ocspExtensions = (extensions == null)
? Collections.<Extension>emptyList()
: new ArrayList<>(extensions);
}
/**
* Gets the optional OCSP request extensions.
*
* @return an unmodifiable list of extensions. The list is empty if no
* extensions have been specified.
*/
public List<Extension> getOcspExtensions() {
return Collections.unmodifiableList(ocspExtensions);
}
/**
* Sets the OCSP responses. These responses are used to determine
* the revocation status of the specified certificates when OCSP is used.
*
* @param responses a map of OCSP responses. Each key is an
* {@code X509Certificate} that maps to the corresponding
* DER-encoded OCSP response for that certificate. A deep copy of
* the map is performed to protect against subsequent modification.
*/
public void setOcspResponses(Map<X509Certificate, byte[]> responses)
{
if (responses == null) {
this.ocspResponses = Collections.<X509Certificate, byte[]>emptyMap();
} else {
Map<X509Certificate, byte[]> copy = new HashMap<>(responses.size());
for (Map.Entry<X509Certificate, byte[]> e : responses.entrySet()) {
copy.put(e.getKey(), e.getValue().clone());
}
this.ocspResponses = copy;
}
}
/**
* Gets the OCSP responses. These responses are used to determine
* the revocation status of the specified certificates when OCSP is used.
*
* @return a map of OCSP responses. Each key is an
* {@code X509Certificate} that maps to the corresponding
* DER-encoded OCSP response for that certificate. A deep copy of
* the map is returned to protect against subsequent modification.
* Returns an empty map if no responses have been specified.
*/
public Map<X509Certificate, byte[]> getOcspResponses() {
Map<X509Certificate, byte[]> copy = new HashMap<>(ocspResponses.size());
for (Map.Entry<X509Certificate, byte[]> e : ocspResponses.entrySet()) {
copy.put(e.getKey(), e.getValue().clone());
}
return copy;
}
/**
* Sets the revocation options.
*
* @param options a set of revocation options. The set is copied to protect
* against subsequent modification.
*/
public void setOptions(Set<Option> options) {
this.options = (options == null)
? Collections.<Option>emptySet()
: new HashSet<>(options);
}
/**
* Gets the revocation options.
*
* @return an unmodifiable set of revocation options. The set is empty if
* no options have been specified.
*/
public Set<Option> getOptions() {
return Collections.unmodifiableSet(options);
}
/**
* Returns a list containing the exceptions that are ignored by the
* revocation checker when the {@link Option#SOFT_FAIL SOFT_FAIL} option
* is set. The list is cleared each time {@link #init init} is called.
* The list is ordered in ascending order according to the certificate
* index returned by {@link CertPathValidatorException#getIndex getIndex}
* method of each entry.
* <p>
* An implementation of {@code PKIXRevocationChecker} is responsible for
* adding the ignored exceptions to the list.
*
* @return an unmodifiable list containing the ignored exceptions. The list
* is empty if no exceptions have been ignored.
*/
public abstract List<CertPathValidatorException> getSoftFailExceptions();
@Override
public PKIXRevocationChecker clone() {
PKIXRevocationChecker copy = (PKIXRevocationChecker)super.clone();
copy.ocspExtensions = new ArrayList<>(ocspExtensions);
copy.ocspResponses = new HashMap<>(ocspResponses);
// deep-copy the encoded responses, since they are mutable
for (Map.Entry<X509Certificate, byte[]> entry :
copy.ocspResponses.entrySet())
{
byte[] encoded = entry.getValue();
entry.setValue(encoded.clone());
}
copy.options = new HashSet<>(options);
return copy;
}
/**
* Various revocation options that can be specified for the revocation
* checking mechanism.
*/
public enum Option {
/**
* Only check the revocation status of end-entity certificates.
*/
ONLY_END_ENTITY,
/**
* Prefer CRLs to OSCP. The default behavior is to prefer OCSP. Each
* PKIX implementation should document further details of their
* specific preference rules and fallback policies.
*/
PREFER_CRLS,
/**
* Disable the fallback mechanism.
*/
NO_FALLBACK,
/**
* Allow revocation check to succeed if the revocation status cannot be
* determined for one of the following reasons:
* <ul>
* <li>The CRL or OCSP response cannot be obtained because of a
* network error.
* <li>The OCSP responder returns one of the following errors
* specified in section 2.3 of RFC 2560: internalError or tryLater.
* </ul><br>
* Note that these conditions apply to both OCSP and CRLs, and unless
* the {@code NO_FALLBACK} option is set, the revocation check is
* allowed to succeed only if both mechanisms fail under one of the
* conditions as stated above.
* Exceptions that cause the network errors are ignored but can be
* later retrieved by calling the
* {@link #getSoftFailExceptions getSoftFailExceptions} method.
*/
SOFT_FAIL
}
}
⏎ java/security/cert/PKIXRevocationChecker.java
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