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Class javax.crypto.SealedObject

java.lang.Object
    |
    +----javax.crypto.SealedObject

public class SealedObject
extends Object
implements Serializable
This class enables a programmer to create an object and protect its confidentiality with a cryptographic algorithm.

Given any Serializable object, one can create a SealedObject that encapsulates the original object, in serialized format (i.e., a "deep copy"), and seals (encrypts) its serialized contents, using a cryptographic algorithm such as DES, to protect its confidentiality. The encrypted content can later be decrypted (with the corresponding algorithm using the correct decryption key) and de-serialized, yielding the original object.

Note that the Cipher object must be fully initialized with the correct algorithm, key, padding scheme, etc., before being applied to a SealedObject.

See Also:
Cipher

Constructor Index

 o SealedObject(Serializable, Cipher)
Constructs a SealedObject from any Serializable object.

Method Index

 o getObject(Cipher)
Retrieves the original (encapsulated) object.

Constructors

 o SealedObject
public SealedObject(Serializable object,
                    Cipher c) throws IOException, IllegalBlockSizeException
Constructs a SealedObject from any Serializable object.

The given object is sealed using the given Cipher, assuming that the Cipher is already properly initialized.

Parameters:
object - the object to be sealed.
c - the cipher used to seal the object.
Throws: IOException
if an error occurs during serialization
Throws: IllegalBlockSizeException
if the given cipher is a block cipher, no padding has been requested, and the total input length is not a multiple of the cipher's block size

Methods

 o getObject
public final Object getObject(Cipher c) throws IOException, ClassNotFoundException, IllegalBlockSizeException, BadPaddingException
Retrieves the original (encapsulated) object.

The encapsulated object is unsealed (using the given Cipher, assuming that the Cipher is already properly initialized) and de-serialized, before it is returned.

Parameters:
c - the cipher used to unseal the object
Returns:
the original object.
Throws: IOException
if an error occurs during de-serialiazation
Throws: ClassNotFoundException
if an error occurs during de-serialiazation
Throws: IllegalBlockSizeException
if the given cipher is a block cipher, no padding has been requested, and the total input length is not a multiple of the cipher's block size
Throws: BadPaddingException
if the given cipher has been initialized for decryption, and padding has been specified, but the input data does not have proper expected padding bytes

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