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KeyManagerFactory (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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javax.net.ssl
Class KeyManagerFactory

java.lang.Object
  |
  +--javax.net.ssl.KeyManagerFactory

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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

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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)

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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.

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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.

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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 provider is not specified

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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 not specified

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getProvider

public final Provider getProvider()

Returns the provider of this KeyManagerFactory object.

Returns:

the provider of this KeyManagerFactory object

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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).

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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

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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 2002 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.