Class KeyManagerFactory

java.lang.Object
- 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

Constructors
Modifier	Constructor	Description
`protected`	`KeyManagerFactory(KeyManagerFactorySpi factorySpi, Provider provider, String algorithm)`	Creates a KeyManagerFactory object.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getAlgorithm()`	Returns the algorithm name of this `KeyManagerFactory` object.
`static String`	`getDefaultAlgorithm()`	Obtains the default KeyManagerFactory algorithm name.
`static KeyManagerFactory`	`getInstance(String algorithm)`	Returns a `KeyManagerFactory` object that acts as a factory for key managers.
`static KeyManagerFactory`	`getInstance(String algorithm, String provider)`	Returns a `KeyManagerFactory` object that acts as a factory for key managers.
`static KeyManagerFactory`	`getInstance(String algorithm, Provider provider)`	Returns a `KeyManagerFactory` object that acts as a factory for key managers.
`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 declared in 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 to the desired algorithm name.

Returns:: the default algorithm name as specified by the ssl.KeyManagerFactory.algorithm security property, or an implementation-specific default if no such property exists.
See Also:: security properties

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

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 Security.getProviders() method.

Implementation Note:: The JDK Reference Implementation additionally uses the jdk.security.provider.preferred Security property to determine the preferred provider order for the specified algorithm. This may be different than the order of providers returned by Security.getProviders().
Parameters:: algorithm - the standard name of the requested algorithm. See the Java Security Standard Algorithm Names document for information about standard algorithm names.
Returns:: the new KeyManagerFactory object
Throws:: NoSuchAlgorithmException - if no Provider supports a KeyManagerFactorySpi implementation for the specified algorithm; NullPointerException - if algorithm is null
See Also:: Provider

getInstance

public static final KeyManagerFactory getInstance(String algorithm,
                                                  String provider)
                                           throws NoSuchAlgorithmException,
                                                  NoSuchProviderException

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 Security.getProviders() method.

Parameters:: algorithm - the standard name of the requested algorithm. See the Java Security Standard Algorithm Names document for information about standard algorithm names.; provider - the name of the provider.
Returns:: the new KeyManagerFactory object
Throws:: IllegalArgumentException - if the provider name is null or empty; NoSuchAlgorithmException - if a KeyManagerFactorySpi implementation for the specified algorithm is not available from the specified provider; NoSuchProviderException - if the specified provider is not registered in the security provider list; NullPointerException - if algorithm is null
See Also:: Provider

getInstance

public static final KeyManagerFactory getInstance(String algorithm,
                                                  Provider provider)
                                           throws NoSuchAlgorithmException

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.

Parameters:: algorithm - the standard name of the requested algorithm. See the Java Security Standard Algorithm Names document for information about standard algorithm names.; provider - an instance of the provider.
Returns:: the new KeyManagerFactory object
Throws:: IllegalArgumentException - if provider is null; NoSuchAlgorithmException - if a @KeyManagerFactorySpi implementation for the specified algorithm is not available from the specified Provider object; NullPointerException - if algorithm is null
See Also:: Provider

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
Throws:: IllegalStateException - if the KeyManagerFactory is not initialized