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

This
class is a wrapper around a serializable object. It serializes the
object and encrypts the resulting data stream, thereby protecting the
confidentiality of the object. Create a
SealedObject by specifying the object to be sealed
and a Cipher object to perform the encryption.
Retrieve the sealed object by calling getObject( )
and specifying the Cipher or
java.security.Key to use for decryption. The
SealedObject keeps track of the encryption
algorithm and parameters so that a Key object
alone can decrypt the object.

Figure 17-9. javax.crypto.SealedObject

public class

SealedObject implements Serializable {
// Public Constructors
public

SealedObject (Serializable

object , Cipher

c )
throws java.io.IOException, IllegalBlockSizeException;
// Protected Constructors
protected

SealedObject (SealedObject

so );
// Public Instance Methods
public final String

getAlgorithm ( );
public final Object

getObject (java.security.Key

key )
throws java.io.IOException, ClassNotFoundException,
java.security.NoSuchAlgorithmException, java.security.InvalidKeyException;
public final Object

getObject (Cipher

c )
throws java.io.IOException, ClassNotFoundException,
IllegalBlockSizeException, BadPaddingException;
public final Object

getObject (java.security.Key

key , String

provider )
throws java.io.IOException, ClassNotFoundException,
java.security.NoSuchAlgorithmException,
java.security.NoSuchProviderException,
java.security.InvalidKeyException;
// Protected Instance Fields
protected byte[ ]

encodedParams ;
}