Package de.hda.fbi.ucs.eucrite.parameters

Class AESParameters

java.lang.Object

de.hda.fbi.ucs.eucrite.parameters.AESParameters

All Implemented Interfaces:

AlgorithmParameters

public class AESParameters
extends Object
implements AlgorithmParameters

The parameters required for the AES symmetrical encryption scheme. It can be used to encrypt and decrypt data with a single, secret key. Whoever has this key is able to decrypt the encrypted data. Therefore, the key must be stored in a secure way.

AES can be used for example to encrypt data on storage. If you want to encrypt messages, you should use a hybrid scheme (see RSA_KEMParameters or McEliece_KEMParameters), where an asymmetric key is used in addition to encrypt and share the secret key with the receiver of the message.

Author:

Alexander Zeier

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AESParameters.Keysize	The keysize determines the security of the AES encryption, but also the performance.
static class	AESParameters.Mode	The operating mode determines how data that is longer than a single block is chained together.
static class	AESParameters.Padding	The padding scheme determines how an incomplete block (that does not reach the full block length) is filled with additional bytes to make a complete block.

Nested classes/interfaces inherited from interface de.hda.fbi.ucs.eucrite.parameters.AlgorithmParameters

AlgorithmParameters.Algorithm, AlgorithmParameters.Template, AlgorithmParameters.Type

Constructor Summary

Constructors

Constructor	Description
AESParameters(AESParameters.Keysize keySize, AESParameters.Mode mode, AESParameters.Padding padding)	Creates a new AESParameters object with the given keySize, mode and padding scheme.

Method Summary

Modifier and Type	Method	Description
int	getKeySize()	Returns the AES key size.
String	getMode()	Returns the mode.
String	getPadding()	Returns the padding scheme.
AlgorithmParameters.Type	getType()	Return the type of the cryptographic scheme.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AESParameters

public AESParameters(AESParameters.Keysize keySize,
AESParameters.Mode mode,
AESParameters.Padding padding)

Creates a new AESParameters object with the given keySize, mode and padding scheme. AES is an symmetrical encryption scheme.

Parameters:

keySize - The size of the AES key. It can be 128, 192 or 256 bit.

mode - The mode used for encryption.

padding - The padding scheme used for encryption.

Method Details

getType

public AlgorithmParameters.Type getType()

Description copied from interface: AlgorithmParameters

Return the type of the cryptographic scheme.

Specified by:

getType in interface AlgorithmParameters

Returns:

The type of the cryptographic scheme.

getMode

public String getMode()

Returns the mode.

Returns:

The encryption mode.

getKeySize

public int getKeySize()

Returns the AES key size.

Returns:

The size of the AES key.

getPadding

public String getPadding()

Returns the padding scheme.

Returns:

The padding scheme.