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

Class RSA_KEMParameters

java.lang.Object

de.hda.fbi.ucs.eucrite.parameters.RSA_KEMParameters

All Implemented Interfaces:

AlgorithmParameters

public class RSA_KEMParameters
extends Object
implements AlgorithmParameters

The parameters required for the hybrid RSA (KEM = Key Encapsulation Mechanism) scheme. An asymmetric RSA key is used to encapsulate a randomly generated AES key which in turn in used to encrypt and decrypt the data.

Since symmetric schemes are much more efficient than asymmetric schemes, this is in general more efficient than encrypting the data directly with the asymmetric key.

If you want to encrypt/decrypt data at rest with no need to exchange the key with other parties, a symmetric encryption scheme like AES can be used.

Author:

Alexander Zeier

Nested Class Summary

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

AlgorithmParameters.Algorithm, AlgorithmParameters.Template, AlgorithmParameters.Type

Constructor Summary

Constructors

Constructor	Description
RSA_KEMParameters(RSAParameters.Keysize rsaKeysize, AESParameters.Keysize aesKeysize, AESParameters.Mode mode, AESParameters.Padding padding)	Creates a new RSA_KEMParameters object with the given rsaKeysize, aesKeysize, mode and padding.

Method Summary

Modifier and Type	Method	Description
int	getAesKeysize()	Get the key size of the AES key.
String	getMode()	Get the mode for the AES scheme.
String	getPadding()	Get the padding for the AES scheme.
int	getRsaKeysize()	Get the key size of the RSA key.
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

RSA_KEMParameters

public RSA_KEMParameters(RSAParameters.Keysize rsaKeysize,
AESParameters.Keysize aesKeysize,
AESParameters.Mode mode,
AESParameters.Padding padding)

Creates a new RSA_KEMParameters object with the given rsaKeysize, aesKeysize, mode and padding. RSA KEM (Key Encapsulation Mechanism) is an hybrid encryption scheme using the asymmetrical RSA scheme to encrypt a symmetrical key which in turn encrypts the data.

Parameters:

rsaKeysize - The size of the RSA key. It can be 2048, 3072 or 4096 bit.

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

mode - The mode used for the AES encryption.

padding - The padding used for the AES 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.

getRsaKeysize

public int getRsaKeysize()

Get the key size of the RSA key.

Returns:

The RSA key size.

getAesKeysize

public int getAesKeysize()

Get the key size of the AES key.

Returns:

The AES key size.

getMode

public String getMode()

Get the mode for the AES scheme.

Returns:

The AES mode.

getPadding

public String getPadding()

Get the padding for the AES scheme.

Returns:

The AES padding.