Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

A
KeyManagerFactory is responsible for creating
KeyManager objects for a specific key management
algorithm. Obtain a KeyManagerFactory object by
calling one of the getInstance(
)
methods and specifying the desired algorithm and, optionally, the
desired provider. In Java 1.4, the
"SunX509" algorithm is
the only one supported by the default
"SunJSSE" provider.
After calling getInstance( ), you initialize the
factory object with init( ). For the
"SunX509" algorithm, you always use
the two-argument version of init( ) passing in a
KeyStore object that contains the private keys and
certificates required by X509KeyManager objects,
and also specifying the password used to protect the private keys in
that KeyStore. Once a
KeyManagerFactory has been created and
initialized, use it to create a KeyManager by
calling getKeyManagers(
). This method returns an array of
KeyManager objects because some key management
algorithms may handle more than one type of key. The
"SunX509" algorithm manages only
X509 keys, and always returns an array with an
X509KeyManager object as its single element. This
returned array is typically passed to the init( )
method of an SSLContext object.

If a KeyStore and password are not passed to the
init( )
method of the KeyManagerFactory for the
"SunX509" algorithm, then the
factory uses attempts to read a KeyStore from the
file specified by the javax.net.ssl.keyStore
system property using the password specified by the
javax.net.ssl.keyStorePassword. The type of the
keystore is specified by
javax.net.ssl.keyStoreType.

public class

KeyManagerFactory {
// Protected Constructors
protected

KeyManagerFactory (KeyManagerFactorySpi

factorySpi ,
java.security.Provider

provider , String

algorithm );
// Public Class Methods
public static final String

getDefaultAlgorithm ( );
public static final KeyManagerFactory

getInstance (String

algorithm )
throws java.security.NoSuchAlgorithmException;
public static final KeyManagerFactory

getInstance (String

algorithm ,
java.security.Provider

provider )
throws java.security.NoSuchAlgorithmException;
public static final KeyManagerFactory

getInstance (String

algorithm ,
String

provider ) throws java.security.NoSuchAlgorithmException,
java.security.NoSuchProviderException;
// Public Instance Methods
public final String

getAlgorithm ( );
public final KeyManager[ ]

getKeyManagers ( );
public final java.security.Provider

getProvider ( );
public final void

init (ManagerFactoryParameters

spec )
throws java.security.InvalidAlgorithmParameterException;
public final void

init (java.security.KeyStore

ks , char[ ]

password )
throws java.security.KeyStoreException,
java.security.NoSuchAlgorithmException,
java.security.UnrecoverableKeyException;
}