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KeyManagerFactory (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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javax.net.ssl
Class KeyManagerFactory

java.lang.Object
  extended by javax.net.ssl.KeyManagerFactory

public class KeyManagerFactory
extends Object

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.

Since:
1.4
See Also:
KeyManager

Constructor Summary
protected KeyManagerFactory(KeyManagerFactorySpi factorySpi, Provider provider, String algorithm)
          Creates a KeyManagerFactory object.
 
Method Summary
 String getAlgorithm()
          Returns the algorithm name of this KeyManagerFactory object.
static String getDefaultAlgorithm()
          Obtains the default KeyManagerFactory algorithm name.
static KeyManagerFactory getInstance(String algorithm)
          Generates a KeyManagerFactory object that implements the specified key management algorithm.
static KeyManagerFactory getInstance(String algorithm, Provider provider)
          Generates a KeyManagerFactory object for the specified key management algorithm from the specified provider.
static KeyManagerFactory getInstance(String algorithm, String provider)
          Generates a KeyManagerFactory object for the specified key management algorithm from the specified provider.
 KeyManager[] getKeyManagers()
          Returns one key manager for each type of key material.
 Provider getProvider()
          Returns the provider of this KeyManagerFactory object.
 void init(KeyStore ks, char[] password)
          Initializes this factory with a source of key material.
 void init(ManagerFactoryParameters spec)
          Initializes this factory with a source of provider-specific key material.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

KeyManagerFactory

protected KeyManagerFactory(KeyManagerFactorySpi factorySpi,
                            Provider provider,
                            String algorithm)
Creates a KeyManagerFactory object.

Parameters:
factorySpi - the delegate
provider - the provider
algorithm - the algorithm
Method Detail

getDefaultAlgorithm

public static final String getDefaultAlgorithm()
Obtains the default KeyManagerFactory algorithm name.

The default algorithm can be changed at runtime by setting the value of the "ssl.KeyManagerFactory.algorithm" security property (set in the Java security properties file or by calling Security.setProperty(java.lang.String, java.lang.String)) to the desired algorithm name.

Returns:
the default algorithm name as specified in the Java security properties, or an implementation-specific default if no such property exists.
See Also:
Security.setProperty(java.lang.String, java.lang.String)

getAlgorithm

public final String getAlgorithm()
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.

Returns:
the algorithm name of this KeyManagerFactory object.

getInstance

public static final KeyManagerFactory getInstance(String algorithm)
                                           throws NoSuchAlgorithmException
Generates a KeyManagerFactory object that implements the specified key management algorithm.

If the default provider package provides an implementation of the requested key management algorithm, an instance of KeyManagerFactory containing that implementation is returned. If the algorithm is not available in the default provider package, other provider packages are searched.

Parameters:
algorithm - the standard name of the requested algorithm.
Returns:
the new KeyManagerFactory object
Throws:
NoSuchAlgorithmException - if the specified algorithm is not available in the default provider package or any of the other provider packages that were searched.

getInstance

public static final KeyManagerFactory getInstance(String algorithm,
                                                  String provider)
                                           throws NoSuchAlgorithmException,
                                                  NoSuchProviderException
Generates a KeyManagerFactory object for the specified key management algorithm from the specified provider.

Parameters:
algorithm - the standard name of the requested algorithm.
provider - the name of the provider
Returns:
the new KeyManagerFactory object
Throws:
NoSuchAlgorithmException - if the specified algorithm is not available from the specified provider.
NoSuchProviderException - if the specified provider has not been configured.
IllegalArgumentException - if the provider name is null or empty.

getInstance

public static final KeyManagerFactory getInstance(String algorithm,
                                                  Provider provider)
                                           throws NoSuchAlgorithmException
Generates a KeyManagerFactory object for the specified key management algorithm from the specified provider.

Parameters:
algorithm - the standard name of the requested algorithm.
provider - an instance of the provider
Returns:
the new KeyManagerFactory object
Throws:
NoSuchAlgorithmException - if the specified algorithm is not available from the specified provider.
IllegalArgumentException - if provider is null.

getProvider

public final Provider getProvider()
Returns the provider of this KeyManagerFactory object.

Returns:
the provider of this KeyManagerFactory object

init

public final void init(KeyStore ks,
                       char[] password)
                throws KeyStoreException,
                       NoSuchAlgorithmException,
                       UnrecoverableKeyException
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 init(ManagerFactoryParameters).

Parameters:
ks - the key store or null
password - the password for recovering keys in the KeyStore
Throws:
KeyStoreException - if this operation fails
NoSuchAlgorithmException - if the specified algorithm is not available from the specified provider.
UnrecoverableKeyException - if the key cannot be recovered (e.g. the given password is wrong).

init

public final void init(ManagerFactoryParameters spec)
                throws InvalidAlgorithmParameterException
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.

Parameters:
spec - an implementation of a provider-specific parameter specification
Throws:
InvalidAlgorithmParameterException - if an error is encountered

getKeyManagers

public final KeyManager[] getKeyManagers()
Returns one key manager for each type of key material.

Returns:
the key managers
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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2004 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.