Class DnieCipherImpl

java.lang.Object

javax.crypto.CipherSpi

es.gob.jmulticard.jse.provider.rsacipher.DnieCipherImpl

public final class DnieCipherImpl
extends CipherSpi

RSA cipher implementation. Supports RSA en/decryption and signing/verifying using PKCS#1 v1.5 padding and without padding (raw RSA). Note that raw RSA is supported mostly for completeness and should only be used in rare cases. Objects should be instantiated by calling Cipher.getInstance() using the following algorithm names: . "RSA/ECB/PKCS1Padding" (or "RSA") for PKCS#1 padding. The mode (blocktype) is selected based on the en/decryption mode and public/private key used . "RSA/ECB/NoPadding" for rsa RSA. We only do one RSA operation per doFinal() call. If the application passes more data via calls to update() or doFinal(), we throw an IllegalBlockSizeException when doFinal() is called (see JCE API spec). Bulk encryption using RSA does not make sense and is not standardized. Note: RSA keys should be at least 512 bits long

Since:

1.5

Field Summary

Fields

Modifier and Type	Field	Description
private static final byte[]	B0
private byte[]	buffer	Buffer para los datos.
private int	bufOfs	Número de octetos en el buffer (el offset).
private int	mode
private static final int	MODE_DECRYPT
private static final int	MODE_ENCRYPT
private static final int	MODE_SIGN
private static final int	MODE_VERIFY
private final String	oaepHashAlgorithm	Algoritmo de huella para el OAEP.
private int	outputSize	Tamaño de los datos de salida.
private static final String	PAD_NONE	RSA sin relleno.
private static final String	PAD_OAEP_MGF1
private static final String	PAD_PKCS1	RSA con relleno PKCS#1 v1.5.
private RSAPadding	padding
private String	paddingType
private RSAPrivateKey	privateKey	Clave privada, si se ha inicializado el cifrador con una clave privada.
private RSAPublicKey	publicKey	La clave pública, si se ha inicializado el cifrador con una clave pública.
private SecureRandom	random
private AlgorithmParameterSpec	spec

Constructor Summary

Constructors

Constructor	Description
DnieCipherImpl()	Construye un cifrador RSA para el DNIe.

Method Summary

Modifier and Type	Method	Description
private byte[]	doFinal()
protected byte[]	engineDoFinal(byte[] inData, int inOfs, int inLen)
protected int	engineDoFinal(byte[] inData, int inOfs, int inLen, byte[] out, int outOfs)
protected int	engineGetBlockSize()
protected byte[]	engineGetIV()
protected int	engineGetKeySize(Key key)
protected int	engineGetOutputSize(int inputLen)
protected AlgorithmParameters	engineGetParameters()
protected void	engineInit(int opmode, Key key, AlgorithmParameters params, SecureRandom rnd)
protected void	engineInit(int opmode, Key key, SecureRandom rnd)
protected void	engineInit(int opmode, Key key, AlgorithmParameterSpec params, SecureRandom rnd)
protected void	engineSetMode(String cipherMode)
protected void	engineSetPadding(String paddingName)
protected Key	engineUnwrap(byte[] wrappedKey, String algorithm, int type)
protected byte[]	engineUpdate(byte[] inData, int inOfs, int inLen)
protected int	engineUpdate(byte[] inData, int inOfs, int inLen, byte[] out, int outOfs)
protected byte[]	engineWrap(Key key)
private void	init(int opmode, Key key, SecureRandom rnd, AlgorithmParameterSpec params)	Inicializa el cifrador.
private void	update(byte[] inData, int inOfs, int inLen)

Methods inherited from class CipherSpi

engineDoFinal, engineUpdate, engineUpdateAAD, engineUpdateAAD

Methods inherited from class Object

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

Field Details

B0

private static final byte[] B0

MODE_ENCRYPT

private static final int MODE_ENCRYPT

See Also:

• Constant Field Values

MODE_DECRYPT

private static final int MODE_DECRYPT

See Also:

• Constant Field Values

MODE_SIGN

private static final int MODE_SIGN

See Also:

• Constant Field Values

MODE_VERIFY

private static final int MODE_VERIFY

See Also:

• Constant Field Values

PAD_NONE

private static final String PAD_NONE

RSA sin relleno.

See Also:

• Constant Field Values

PAD_PKCS1

private static final String PAD_PKCS1

RSA con relleno PKCS#1 v1.5.

See Also:

• Constant Field Values

PAD_OAEP_MGF1

private static final String PAD_OAEP_MGF1

See Also:

• Constant Field Values

mode

private int mode

paddingType

private String paddingType

padding

private RSAPadding padding

spec

private AlgorithmParameterSpec spec

buffer

private byte[] buffer

Buffer para los datos.

bufOfs

private int bufOfs

Número de octetos en el buffer (el offset).

outputSize

private int outputSize

Tamaño de los datos de salida.

publicKey

private RSAPublicKey publicKey

La clave pública, si se ha inicializado el cifrador con una clave pública.

privateKey

private RSAPrivateKey privateKey

Clave privada, si se ha inicializado el cifrador con una clave privada.

oaepHashAlgorithm

private final String oaepHashAlgorithm

Algoritmo de huella para el OAEP.

See Also:

• Constant Field Values

random

private SecureRandom random

Constructor Details

DnieCipherImpl

public DnieCipherImpl()

Construye un cifrador RSA para el DNIe.

Method Details

engineSetMode

protected void engineSetMode(String cipherMode)
                      throws NoSuchAlgorithmException

Specified by:

engineSetMode in class CipherSpi

Throws:

NoSuchAlgorithmException

engineSetPadding

protected void engineSetPadding(String paddingName)
                         throws NoSuchPaddingException

Specified by:

engineSetPadding in class CipherSpi

Throws:

NoSuchPaddingException

engineGetBlockSize

protected int engineGetBlockSize()

Specified by:

engineGetBlockSize in class CipherSpi

engineGetOutputSize

protected int engineGetOutputSize(int inputLen)

Specified by:

engineGetOutputSize in class CipherSpi

engineGetIV

protected byte[] engineGetIV()

Specified by:

engineGetIV in class CipherSpi

engineGetParameters

protected AlgorithmParameters engineGetParameters()

Specified by:

engineGetParameters in class CipherSpi

engineInit

protected void engineInit(int opmode,
 Key key,
 SecureRandom rnd)
                   throws InvalidKeyException

Specified by:

engineInit in class CipherSpi

Throws:

InvalidKeyException

engineInit

protected void engineInit(int opmode,
 Key key,
 AlgorithmParameterSpec params,
 SecureRandom rnd)
                   throws InvalidKeyException,
InvalidAlgorithmParameterException

Specified by:

engineInit in class CipherSpi

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

engineInit

protected void engineInit(int opmode,
 Key key,
 AlgorithmParameters params,
 SecureRandom rnd)
                   throws InvalidKeyException,
InvalidAlgorithmParameterException

Specified by:

engineInit in class CipherSpi

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

init

private void init(int opmode,
 Key key,
 SecureRandom rnd,
 AlgorithmParameterSpec params)
           throws InvalidKeyException,
InvalidAlgorithmParameterException

Inicializa el cifrador.

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

update

private void update(byte[] inData,
 int inOfs,
 int inLen)

doFinal

private byte[] doFinal()
                throws BadPaddingException,
IllegalBlockSizeException,
CryptoCardException,
PinException,
LostChannelException

Throws:

BadPaddingException

IllegalBlockSizeException

CryptoCardException

PinException

LostChannelException

engineUpdate

protected byte[] engineUpdate(byte[] inData,
 int inOfs,
 int inLen)

Specified by:

engineUpdate in class CipherSpi

engineUpdate

protected int engineUpdate(byte[] inData,
 int inOfs,
 int inLen,
 byte[] out,
 int outOfs)

Specified by:

engineUpdate in class CipherSpi

engineDoFinal

protected byte[] engineDoFinal(byte[] inData,
 int inOfs,
 int inLen)
                        throws BadPaddingException,
IllegalBlockSizeException

Specified by:

engineDoFinal in class CipherSpi

Throws:

BadPaddingException

IllegalBlockSizeException

engineDoFinal

protected int engineDoFinal(byte[] inData,
 int inOfs,
 int inLen,
 byte[] out,
 int outOfs)
                     throws ShortBufferException,
BadPaddingException,
IllegalBlockSizeException

Specified by:

engineDoFinal in class CipherSpi

Throws:

ShortBufferException

BadPaddingException

IllegalBlockSizeException

engineWrap

protected byte[] engineWrap(Key key)
                     throws InvalidKeyException,
IllegalBlockSizeException

Overrides:

engineWrap in class CipherSpi

Throws:

InvalidKeyException

IllegalBlockSizeException

engineUnwrap

protected Key engineUnwrap(byte[] wrappedKey,
 String algorithm,
 int type)
                    throws InvalidKeyException,
NoSuchAlgorithmException

Overrides:

engineUnwrap in class CipherSpi

Throws:

InvalidKeyException

NoSuchAlgorithmException

engineGetKeySize

protected int engineGetKeySize(Key key)
                        throws InvalidKeyException

Overrides:

engineGetKeySize in class CipherSpi

Throws:

InvalidKeyException