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CertPathValidator.java
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343 lines (329 loc) · 13.1 KB
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/*
* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
*
*
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*
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*
*
*/
package java.security.cert;
import java.security.AccessController;
import java.security.InvalidAlgorithmParameterException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivilegedAction;
import java.security.Provider;
import java.security.Security;
import sun.security.util.Debug;
import sun.security.jca.*;
import sun.security.jca.GetInstance.Instance;
/**
* A class for validating certification paths (also known as certificate
* chains).
* <p>
* This class uses a provider-based architecture.
* To create a {@code CertPathValidator},
* call one of the static {@code getInstance} methods, passing in the
* algorithm name of the {@code CertPathValidator} desired and
* optionally the name of the provider desired.
*
* <p>Once a {@code CertPathValidator} object has been created, it can
* be used to validate certification paths by calling the {@link #validate
* validate} method and passing it the {@code CertPath} to be validated
* and an algorithm-specific set of parameters. If successful, the result is
* returned in an object that implements the
* {@code CertPathValidatorResult} interface.
*
* <p>The {@link #getRevocationChecker} method allows an application to specify
* additional algorithm-specific parameters and options used by the
* {@code CertPathValidator} when checking the revocation status of
* certificates. Here is an example demonstrating how it is used with the PKIX
* algorithm:
*
* <pre>
* CertPathValidator cpv = CertPathValidator.getInstance("PKIX");
* PKIXRevocationChecker rc = (PKIXRevocationChecker)cpv.getRevocationChecker();
* rc.setOptions(EnumSet.of(Option.SOFT_FAIL));
* params.addCertPathChecker(rc);
* CertPathValidatorResult cpvr = cpv.validate(path, params);
* </pre>
*
* <p>Every implementation of the Java platform is required to support the
* following standard {@code CertPathValidator} algorithm:
* <ul>
* <li>{@code PKIX}</li>
* </ul>
* This algorithm is described in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#CertPathValidator">
* CertPathValidator section</a> of the
* Java Cryptography Architecture Standard Algorithm Name Documentation.
* Consult the release documentation for your implementation to see if any
* other algorithms are supported.
*
* <p>
* <b>Concurrent Access</b>
* <p>
* The static methods of this class are guaranteed to be thread-safe.
* Multiple threads may concurrently invoke the static methods defined in
* this class with no ill effects.
* <p>
* However, this is not true for the non-static methods defined by this class.
* Unless otherwise documented by a specific provider, threads that need to
* access a single {@code CertPathValidator} instance concurrently should
* synchronize amongst themselves and provide the necessary locking. Multiple
* threads each manipulating a different {@code CertPathValidator}
* instance need not synchronize.
*
* @see CertPath
*
* @since 1.4
* @author Yassir Elley
*/
public class CertPathValidator {
/*
* Constant to lookup in the Security properties file to determine
* the default certpathvalidator type. In the Security properties file,
* the default certpathvalidator type is given as:
* <pre>
* certpathvalidator.type=PKIX
* </pre>
*/
private static final String CPV_TYPE = "certpathvalidator.type";
private final CertPathValidatorSpi validatorSpi;
private final Provider provider;
private final String algorithm;
/**
* Creates a {@code CertPathValidator} object of the given algorithm,
* and encapsulates the given provider implementation (SPI object) in it.
*
* @param validatorSpi the provider implementation
* @param provider the provider
* @param algorithm the algorithm name
*/
protected CertPathValidator(CertPathValidatorSpi validatorSpi,
Provider provider, String algorithm)
{
this.validatorSpi = validatorSpi;
this.provider = provider;
this.algorithm = algorithm;
}
/**
* Returns a {@code CertPathValidator} object that implements the
* specified algorithm.
*
* <p> This method traverses the list of registered security Providers,
* starting with the most preferred Provider.
* A new CertPathValidator object encapsulating the
* CertPathValidatorSpi implementation from the first
* Provider that supports the specified algorithm is returned.
*
* <p> Note that the list of registered providers may be retrieved via
* the {@link Security#getProviders() Security.getProviders()} method.
*
* @param algorithm the name of the requested {@code CertPathValidator}
* algorithm. See the CertPathValidator section in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#CertPathValidator">
* Java Cryptography Architecture Standard Algorithm Name Documentation</a>
* for information about standard algorithm names.
*
* @return a {@code CertPathValidator} object that implements the
* specified algorithm.
*
* @exception NoSuchAlgorithmException if no Provider supports a
* CertPathValidatorSpi implementation for the
* specified algorithm.
*
* @see java.security.Provider
*/
public static CertPathValidator getInstance(String algorithm)
throws NoSuchAlgorithmException {
Instance instance = GetInstance.getInstance("CertPathValidator",
CertPathValidatorSpi.class, algorithm);
return new CertPathValidator((CertPathValidatorSpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns a {@code CertPathValidator} object that implements the
* specified algorithm.
*
* <p> A new CertPathValidator object encapsulating the
* CertPathValidatorSpi implementation from the specified provider
* is returned. The specified provider must be registered
* in the security provider list.
*
* <p> Note that the list of registered providers may be retrieved via
* the {@link Security#getProviders() Security.getProviders()} method.
*
* @param algorithm the name of the requested {@code CertPathValidator}
* algorithm. See the CertPathValidator section in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#CertPathValidator">
* Java Cryptography Architecture Standard Algorithm Name Documentation</a>
* for information about standard algorithm names.
*
* @param provider the name of the provider.
*
* @return a {@code CertPathValidator} object that implements the
* specified algorithm.
*
* @exception NoSuchAlgorithmException if a CertPathValidatorSpi
* implementation for the specified algorithm is not
* available from the specified provider.
*
* @exception NoSuchProviderException if the specified provider is not
* registered in the security provider list.
*
* @exception IllegalArgumentException if the {@code provider} is
* null or empty.
*
* @see java.security.Provider
*/
public static CertPathValidator getInstance(String algorithm,
String provider) throws NoSuchAlgorithmException,
NoSuchProviderException {
Instance instance = GetInstance.getInstance("CertPathValidator",
CertPathValidatorSpi.class, algorithm, provider);
return new CertPathValidator((CertPathValidatorSpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns a {@code CertPathValidator} object that implements the
* specified algorithm.
*
* <p> A new CertPathValidator object encapsulating the
* CertPathValidatorSpi implementation from the specified Provider
* object is returned. Note that the specified Provider object
* does not have to be registered in the provider list.
*
* @param algorithm the name of the requested {@code CertPathValidator}
* algorithm. See the CertPathValidator section in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#CertPathValidator">
* Java Cryptography Architecture Standard Algorithm Name Documentation</a>
* for information about standard algorithm names.
*
* @param provider the provider.
*
* @return a {@code CertPathValidator} object that implements the
* specified algorithm.
*
* @exception NoSuchAlgorithmException if a CertPathValidatorSpi
* implementation for the specified algorithm is not available
* from the specified Provider object.
*
* @exception IllegalArgumentException if the {@code provider} is
* null.
*
* @see java.security.Provider
*/
public static CertPathValidator getInstance(String algorithm,
Provider provider) throws NoSuchAlgorithmException {
Instance instance = GetInstance.getInstance("CertPathValidator",
CertPathValidatorSpi.class, algorithm, provider);
return new CertPathValidator((CertPathValidatorSpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns the {@code Provider} of this
* {@code CertPathValidator}.
*
* @return the {@code Provider} of this {@code CertPathValidator}
*/
public final Provider getProvider() {
return this.provider;
}
/**
* Returns the algorithm name of this {@code CertPathValidator}.
*
* @return the algorithm name of this {@code CertPathValidator}
*/
public final String getAlgorithm() {
return this.algorithm;
}
/**
* Validates the specified certification path using the specified
* algorithm parameter set.
* <p>
* The {@code CertPath} specified must be of a type that is
* supported by the validation algorithm, otherwise an
* {@code InvalidAlgorithmParameterException} will be thrown. For
* example, a {@code CertPathValidator} that implements the PKIX
* algorithm validates {@code CertPath} objects of type X.509.
*
* @param certPath the {@code CertPath} to be validated
* @param params the algorithm parameters
* @return the result of the validation algorithm
* @exception CertPathValidatorException if the {@code CertPath}
* does not validate
* @exception InvalidAlgorithmParameterException if the specified
* parameters or the type of the specified {@code CertPath} are
* inappropriate for this {@code CertPathValidator}
*/
public final CertPathValidatorResult validate(CertPath certPath,
CertPathParameters params)
throws CertPathValidatorException, InvalidAlgorithmParameterException
{
return validatorSpi.engineValidate(certPath, params);
}
/**
* Returns the default {@code CertPathValidator} type as specified by
* the {@code certpathvalidator.type} security property, or the string
* {@literal "PKIX"} if no such property exists.
*
* <p>The default {@code CertPathValidator} type can be used by
* applications that do not want to use a hard-coded type when calling one
* of the {@code getInstance} methods, and want to provide a default
* type in case a user does not specify its own.
*
* <p>The default {@code CertPathValidator} type can be changed by
* setting the value of the {@code certpathvalidator.type} security
* property to the desired type.
*
* @see java.security.Security security properties
* @return the default {@code CertPathValidator} type as specified
* by the {@code certpathvalidator.type} security property, or the string
* {@literal "PKIX"} if no such property exists.
*/
public final static String getDefaultType() {
String cpvtype =
AccessController.doPrivileged(new PrivilegedAction<String>() {
public String run() {
return Security.getProperty(CPV_TYPE);
}
});
return (cpvtype == null) ? "PKIX" : cpvtype;
}
/**
* Returns a {@code CertPathChecker} that the encapsulated
* {@code CertPathValidatorSpi} implementation uses to check the revocation
* status of certificates. A PKIX implementation returns objects of
* type {@code PKIXRevocationChecker}. Each invocation of this method
* returns a new instance of {@code CertPathChecker}.
*
* <p>The primary purpose of this method is to allow callers to specify
* additional input parameters and options specific to revocation checking.
* See the class description for an example.
*
* @return a {@code CertPathChecker}
* @throws UnsupportedOperationException if the service provider does not
* support this method
* @since 1.8
*/
public final CertPathChecker getRevocationChecker() {
return validatorSpi.engineGetRevocationChecker();
}
}