Class CipherSpi

java.lang.Object

javax.crypto.CipherSpi

org.bouncycastle.jcajce.provider.asymmetric.sm9.CipherSpi

public class CipherSpi
extends CipherSpi

JCA Cipher for SM9 public-key encryption (GM/T 0044.4).

Encrypt with the recipient's public key, formed from the published master public key and the recipient's identity via SM9EncMasterPublicKey.getUserPublicKey(byte[]) (the same recipient key the SM9-KEM encapsulates to); decrypt with the recipient's private key. The ciphertext is a DER SM9Cipher whose enType records the data-encapsulation mode, so decryption selects the mode automatically. The default encryption mode is SM4/ECB/PKCS#7 (enType = 1); call setMode("XOR") for the KDF stream mode.

The ciphertext is the GM/T 0080-2020 SM9Cipher structure (see SM9Cipher).

Constructor Summary

Constructors

Constructor	Description
CipherSpi()

Method Summary

Modifier and Type	Method	Description
protected byte[]	engineDoFinal(byte[] input, int inputOffset, int inputLen)
protected int	engineDoFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
protected int	engineGetBlockSize()
protected byte[]	engineGetIV()
protected int	engineGetOutputSize(int inputLen)
protected AlgorithmParameters	engineGetParameters()
protected void	engineInit(int opmode, Key key, AlgorithmParameters params, SecureRandom random)
protected void	engineInit(int opmode, Key key, SecureRandom random)
protected void	engineInit(int opmode, Key key, AlgorithmParameterSpec params, SecureRandom random)
protected void	engineSetMode(String modeName)
protected void	engineSetPadding(String padding)
protected byte[]	engineUpdate(byte[] input, int inputOffset, int inputLen)
protected int	engineUpdate(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)

Methods inherited from class CipherSpi

engineDoFinal, engineGetKeySize, engineUnwrap, engineUpdate, engineUpdateAAD, engineUpdateAAD, engineWrap

Methods inherited from class Object

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

Constructor Details

CipherSpi

public CipherSpi()

Method Details

engineSetMode

protected void engineSetMode(String modeName)
                      throws NoSuchAlgorithmException

Specified by:

engineSetMode in class CipherSpi

Throws:

NoSuchAlgorithmException

engineSetPadding

protected void engineSetPadding(String padding)
                         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 random)
                   throws InvalidKeyException

Specified by:

engineInit in class CipherSpi

Throws:

InvalidKeyException

engineInit

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

Specified by:

engineInit in class CipherSpi

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

engineInit

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

Specified by:

engineInit in class CipherSpi

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

engineUpdate

protected byte[] engineUpdate(byte[] input,
 int inputOffset,
 int inputLen)

Specified by:

engineUpdate in class CipherSpi

engineUpdate

protected int engineUpdate(byte[] input,
 int inputOffset,
 int inputLen,
 byte[] output,
 int outputOffset)

Specified by:

engineUpdate in class CipherSpi

engineDoFinal

protected byte[] engineDoFinal(byte[] input,
 int inputOffset,
 int inputLen)
                        throws IllegalBlockSizeException,
BadPaddingException

Specified by:

engineDoFinal in class CipherSpi

Throws:

IllegalBlockSizeException

BadPaddingException

engineDoFinal

protected int engineDoFinal(byte[] input,
 int inputOffset,
 int inputLen,
 byte[] output,
 int outputOffset)
                     throws ShortBufferException,
IllegalBlockSizeException,
BadPaddingException

Specified by:

engineDoFinal in class CipherSpi

Throws:

ShortBufferException

IllegalBlockSizeException

BadPaddingException