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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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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 key managers based on a
* source of key material. Each key manager manages a specific
* type of key material for use by secure sockets. The key
* material is based on a KeyStore and/or provider specific sources.
*
* Android provides the following KeyManagerFactory algorithms:
*
*
*
* Algorithm
* Supported API Levels
*
*
*
*
* PKIX
* 1+
*
*
*
*
* @since 1.4
* @see KeyManager
*/
public class KeyManagerFactory {
// The provider
private Provider provider;
// The provider implementation (delegate)
private KeyManagerFactorySpi factorySpi;
// The name of the key management algorithm.
private String algorithm;
/**
* Obtains the default KeyManagerFactory algorithm name.
*
* The default algorithm can be changed at runtime by setting
* the value of the {@code ssl.KeyManagerFactory.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.KeyManagerFactory.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.KeyManagerFactory.algorithm");
}
});
if (type == null) {
type = "SunX509";
}
return type;
}
/**
* Creates a KeyManagerFactory object.
*
* @param factorySpi the delegate
* @param provider the provider
* @param algorithm the algorithm
*/
protected KeyManagerFactory(KeyManagerFactorySpi factorySpi,
Provider provider, String algorithm) {
this.factorySpi = factorySpi;
this.provider = provider;
this.algorithm = algorithm;
}
/**
* Returns the algorithm name of this KeyManagerFactory object.
*
* This is the same name that was specified in one of the
* getInstance calls that created this
* KeyManagerFactory object.
*
* @return the algorithm name of this KeyManagerFactory object.
*/
public final String getAlgorithm() {
return this.algorithm;
}
/**
* Returns a KeyManagerFactory object that acts as a
* factory for key managers.
*
*
This method traverses the list of registered security Providers,
* starting with the most preferred Provider.
* A new KeyManagerFactory object encapsulating the
* KeyManagerFactorySpi 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 algorithm.
* See the
* Java Secure Socket Extension Reference Guide
* for information about standard algorithm names.
*
* @return the new KeyManagerFactory object.
*
* @exception NoSuchAlgorithmException if no Provider supports a
* KeyManagerFactorySpi implementation for the
* specified algorithm.
* @exception NullPointerException if algorithm is null.
*
* @see java.security.Provider
*/
public static final KeyManagerFactory getInstance(String algorithm)
throws NoSuchAlgorithmException {
GetInstance.Instance instance = GetInstance.getInstance
("KeyManagerFactory", KeyManagerFactorySpi.class,
algorithm);
return new KeyManagerFactory((KeyManagerFactorySpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns a KeyManagerFactory object that acts as a
* factory for key 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 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 KeyManagerFactory object.
*
* @throws NoSuchAlgorithmException if a KeyManagerFactorySpi
* 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 KeyManagerFactory getInstance(String algorithm,
String provider) throws NoSuchAlgorithmException,
NoSuchProviderException {
GetInstance.Instance instance = GetInstance.getInstance
("KeyManagerFactory", KeyManagerFactorySpi.class,
algorithm, provider);
return new KeyManagerFactory((KeyManagerFactorySpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns a KeyManagerFactory object that acts as a
* factory for key managers.
*
*
A new KeyManagerFactory object encapsulating the
* KeyManagerFactorySpi 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 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 KeyManagerFactory object.
*
* @throws NoSuchAlgorithmException if a KeyManagerFactorySpi
* implementation for the specified algorithm is not available
* from the specified Provider object.
*
* @throws IllegalArgumentException if provider is null.
* @throws NullPointerException if algorithm is null.
*
* @see java.security.Provider
*/
public static final KeyManagerFactory getInstance(String algorithm,
Provider provider) throws NoSuchAlgorithmException {
GetInstance.Instance instance = GetInstance.getInstance
("KeyManagerFactory", KeyManagerFactorySpi.class,
algorithm, provider);
return new KeyManagerFactory((KeyManagerFactorySpi)instance.impl,
instance.provider, algorithm);
}
/**
* Returns the provider of this KeyManagerFactory object.
*
* @return the provider of this KeyManagerFactory object
*/
public final Provider getProvider() {
return this.provider;
}
/**
* Initializes this factory with a source of key material.
*
* The provider typically uses a KeyStore for obtaining
* key material for use during secure socket negotiations.
* The KeyStore is generally password-protected.
*
* For more flexible initialization, please see
* {@link #init(ManagerFactoryParameters)}.
*
*
* @param ks the key store or null
* @param password the password for recovering keys in the KeyStore
* @throws KeyStoreException if this operation fails
* @throws NoSuchAlgorithmException if the specified algorithm is not
* available from the specified provider.
* @throws UnrecoverableKeyException if the key cannot be recovered
* (e.g. the given password is wrong).
*/
public final void init(KeyStore ks, char[] password) throws
KeyStoreException, NoSuchAlgorithmException,
UnrecoverableKeyException {
factorySpi.engineInit(ks, password);
}
/**
* Initializes this factory with a source of provider-specific
* key material.
*
* In some cases, initialization parameters other than a keystore
* and password 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 key manager for each type of key material.
*
* @return the key managers
* @throws IllegalStateException if the KeyManagerFactory is not initialized
*/
public final KeyManager[] getKeyManagers() {
return factorySpi.engineGetKeyManagers();
}
}