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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
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*
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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package javax.net.ssl;
import java.security.Security;
import java.security.*;
import sun.security.jca.GetInstance;
/**
* This class acts as a factory for trust managers based on a
* source of trust material. Each trust manager manages a specific
* type of trust material for use by secure sockets. The trust
* material is based on a KeyStore and/or provider specific sources.
*
* Android provides the following TrustManagerFactory algorithms:
*
*
*
* Algorithm
* Supported API Levels
*
*
*
*
* PKIX
* 1+
*
*
*
*
* @since 1.4
* @see TrustManager
*/
public class TrustManagerFactory {
// The provider
private Provider provider;
// The provider implementation (delegate)
private TrustManagerFactorySpi factorySpi;
// The name of the trust management algorithm.
private String algorithm;
/**
* Obtains the default TrustManagerFactory algorithm name.
*
* The default TrustManager can be changed at runtime by setting
* the value of the {@code ssl.TrustManagerFactory.algorithm}
* security property to the desired algorithm name.
*
* @see java.security.Security security properties
* @return the default algorithm name as specified by the
* {@code ssl.TrustManagerFactory.algorithm} security property, or an
* implementation-specific default if no such property exists.
*/
public final static String getDefaultAlgorithm() {
String type;
type = AccessController.doPrivileged(new PrivilegedAction() {
@Override
public String run() {
return Security.getProperty(
"ssl.TrustManagerFactory.algorithm");
}
});
if (type == null) {
type = "SunX509";
}
return type;
}
/**
* Creates a TrustManagerFactory object.
*
* @param factorySpi the delegate
* @param provider the provider
* @param algorithm the algorithm
*/
protected TrustManagerFactory(TrustManagerFactorySpi factorySpi,
Provider provider, String algorithm) {
this.factorySpi = factorySpi;
this.provider = provider;
this.algorithm = algorithm;
}
/**
* Returns the algorithm name of this TrustManagerFactory
* object.
*
* This is the same name that was specified in one of the
* getInstance calls that created this
* TrustManagerFactory object.
*
* @return the algorithm name of this TrustManagerFactory
* object
*/
public final String getAlgorithm() {
return this.algorithm;
}
/**
* Returns a TrustManagerFactory object that acts as a
* factory for trust managers.
*
*
This method traverses the list of registered security Providers,
* starting with the most preferred Provider.
* A new TrustManagerFactory object encapsulating the
* TrustManagerFactorySpi implementation from the first
* Provider that supports the specified algorithm is returned.
*
*
Note that the list of registered providers may be retrieved via
* the {@link Security#getProviders() Security.getProviders()} method.
*
* @param algorithm the standard name of the requested trust management
* algorithm. See the
* Java Secure Socket Extension Reference Guide
* for information about standard algorithm names.
*
* @return the new TrustManagerFactory object.
*
* @exception NoSuchAlgorithmException if no Provider supports a
* TrustManagerFactorySpi implementation for the
* specified algorithm.
* @exception NullPointerException if algorithm is null.
*
* @see java.security.Provider
*/
public static final TrustManagerFactory getInstance(String algorithm)
throws NoSuchAlgorithmException {
GetInstance.Instance instance = GetInstance.getInstance
("TrustManagerFactory", TrustManagerFactorySpi.class,
algorithm);
return new TrustManagerFactory((TrustManagerFactorySpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns a TrustManagerFactory object that acts as a
* factory for trust managers.
*
*
A new KeyManagerFactory object encapsulating the
* KeyManagerFactorySpi implementation from the specified provider
* is returned. The specified provider must be registered
* in the security provider list.
*
*
Note that the list of registered providers may be retrieved via
* the {@link Security#getProviders() Security.getProviders()} method.
*
* @param algorithm the standard name of the requested trust management
* algorithm. See the
* Java Secure Socket Extension Reference Guide
* for information about standard algorithm names.
*
* @param provider the name of the provider.
*
* @return the new TrustManagerFactory object
*
* @throws NoSuchAlgorithmException if a TrustManagerFactorySpi
* implementation for the specified algorithm is not
* available from the specified provider.
*
* @throws NoSuchProviderException if the specified provider is not
* registered in the security provider list.
*
* @throws IllegalArgumentException if the provider name is null or empty.
* @throws NullPointerException if algorithm is null.
*
* @see java.security.Provider
*/
public static final TrustManagerFactory getInstance(String algorithm,
String provider) throws NoSuchAlgorithmException,
NoSuchProviderException {
GetInstance.Instance instance = GetInstance.getInstance
("TrustManagerFactory", TrustManagerFactorySpi.class,
algorithm, provider);
return new TrustManagerFactory((TrustManagerFactorySpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns a TrustManagerFactory object that acts as a
* factory for trust managers.
*
*
A new TrustManagerFactory object encapsulating the
* TrustManagerFactorySpi 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 standard name of the requested trust management
* algorithm. See the
* Java Secure Socket Extension Reference Guide
* for information about standard algorithm names.
*
* @param provider an instance of the provider.
*
* @return the new TrustManagerFactory object.
*
* @throws NoSuchAlgorithmException if a TrustManagerFactorySpi
* implementation for the specified algorithm is not available
* from the specified Provider object.
*
* @throws IllegalArgumentException if the provider is null.
* @throws NullPointerException if algorithm is null.
*
* @see java.security.Provider
*/
public static final TrustManagerFactory getInstance(String algorithm,
Provider provider) throws NoSuchAlgorithmException {
GetInstance.Instance instance = GetInstance.getInstance
("TrustManagerFactory", TrustManagerFactorySpi.class,
algorithm, provider);
return new TrustManagerFactory((TrustManagerFactorySpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns the provider of this TrustManagerFactory object.
*
* @return the provider of this TrustManagerFactory object
*/
public final Provider getProvider() {
return this.provider;
}
/**
* Initializes this factory with a source of certificate
* authorities and related trust material.
*
* The provider typically uses a KeyStore as a basis for making
* trust decisions.
*
* For more flexible initialization, please see
* {@link #init(ManagerFactoryParameters)}.
*
* @param ks the key store, or null
* @throws KeyStoreException if this operation fails
*/
public final void init(KeyStore ks) throws KeyStoreException {
factorySpi.engineInit(ks);
}
/**
* Initializes this factory with a source of provider-specific
* trust material.
*
* In some cases, initialization parameters other than a keystore
* may be needed by a provider. Users of that particular provider
* are expected to pass an implementation of the appropriate
* ManagerFactoryParameters as defined by the
* provider. The provider can then call the specified methods in
* the ManagerFactoryParameters implementation to obtain the
* needed information.
*
* @param spec an implementation of a provider-specific parameter
* specification
* @throws InvalidAlgorithmParameterException if an error is
* encountered
*/
public final void init(ManagerFactoryParameters spec) throws
InvalidAlgorithmParameterException {
factorySpi.engineInit(spec);
}
/**
* Returns one trust manager for each type of trust material.
*
* @throws IllegalStateException if the factory is not initialized.
*
* @return the trust managers
*/
public final TrustManager[] getTrustManagers() {
return factorySpi.engineGetTrustManagers();
}
}