org.openeuler.sm4.mode

类 CBC

java.lang.Object

javax.crypto.CipherSpi

org.openeuler.sm4.SM4BaseCipher

org.openeuler.sm4.StreamModeBaseCipher

org.openeuler.sm4.mode.CBC

public class CBC
extends StreamModeBaseCipher

SM4 CBC mode

字段概要

从类继承的字段 org.openeuler.sm4.StreamModeBaseCipher

counter, iv

从类继承的字段 org.openeuler.sm4.SM4BaseCipher

BLOCKSIZE, inputLenUpdate, inputOffsetUpdate, inputUpdate, isInitialized, len, opmode, padding, rk, sm4

构造器概要

构造器

构造器和说明
CBC()

方法概要

限定符和类型	方法和说明
private void	decryptCBC(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) decrypt entire blocks of data
private byte[]	decryptLastBlock(byte[] input, int inputOffset, int inputLen, int extra, byte[] cipher) decrypt the last block and return an array containing the decrypted result.
private int	decryptLastBlock(byte[] input, int inputOffset, int inputLen, int extra, byte[] output, int outputOffset, byte[] cipher) decrypting the last block and return the number of bytes required to store the decryption result
private void	encrypt(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) encrypt with handling padding
private void	encryptCBC(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) encrypt entire blocks of data
byte[]	engineDoFinal(byte[] input, int inputOffset, int inputLen)
int	engineDoFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
byte[]	engineUpdate(byte[] input, int inputOffset, int inputLen)
int	engineUpdate(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
void	reset() reset some parameters after encryption

从类继承的方法 org.openeuler.sm4.StreamModeBaseCipher

engineGetIV, engineGetParameters, engineInit, engineInit, engineInit

从类继承的方法 org.openeuler.sm4.SM4BaseCipher

engineGetBlockSize, engineGetOutputSize, engineSetMode, engineSetPadding, engineUpdateAAD, init

从类继承的方法 javax.crypto.CipherSpi

engineDoFinal, engineGetKeySize, engineUnwrap, engineUpdate, engineUpdateAAD, engineWrap

从类继承的方法 java.lang.Object

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

构造器详细资料

CBC

public CBC()

方法详细资料

engineUpdate

public int engineUpdate(byte[] input,
                        int inputOffset,
                        int inputLen,
                        byte[] output,
                        int outputOffset)
                 throws ShortBufferException

覆盖:

engineUpdate 在类中 SM4BaseCipher

抛出:

ShortBufferException

engineUpdate

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

覆盖:

engineUpdate 在类中 SM4BaseCipher

engineDoFinal

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

覆盖:

engineDoFinal 在类中 StreamModeBaseCipher

抛出:

IllegalBlockSizeException

BadPaddingException

engineDoFinal

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

覆盖:

engineDoFinal 在类中 StreamModeBaseCipher

抛出:

ShortBufferException

IllegalBlockSizeException

BadPaddingException

decryptLastBlock

private byte[] decryptLastBlock(byte[] input,
                                int inputOffset,
                                int inputLen,
                                int extra,
                                byte[] cipher)
                         throws BadPaddingException

decrypt the last block and return an array containing the decrypted result. if there is padding the length of the final result can only be determined if the last block is decrypted.

参数:

input -

inputOffset -

inputLen -

extra - the number of bytes required in addition to the input data

cipher -

返回:

byte array which contain the last block decrypted and whose length is extra+inputLen-16+(lastBlockDecrypted).length

抛出:

BadPaddingException

decryptLastBlock

private int decryptLastBlock(byte[] input,
                             int inputOffset,
                             int inputLen,
                             int extra,
                             byte[] output,
                             int outputOffset,
                             byte[] cipher)
                      throws BadPaddingException,
                             ShortBufferException

decrypting the last block and return the number of bytes required to store the decryption result

参数:

input -

inputOffset -

inputLen -

extra -

output -

outputOffset -

cipher -

返回:

抛出:

BadPaddingException

ShortBufferException

decryptCBC

private void decryptCBC(byte[] input,
                        int inputOffset,
                        int inputLen,
                        byte[] output,
                        int outputOffset)

decrypt entire blocks of data

参数:

input -

inputOffset -

inputLen -

output -

outputOffset -

encrypt

private void encrypt(byte[] input,
                     int inputOffset,
                     int inputLen,
                     byte[] output,
                     int outputOffset)

encrypt with handling padding

参数:

input -

inputOffset -

inputLen -

output -

outputOffset -

encryptCBC

private void encryptCBC(byte[] input,
                        int inputOffset,
                        int inputLen,
                        byte[] output,
                        int outputOffset)

encrypt entire blocks of data

参数:

input -

inputOffset -

inputLen -

output -

outputOffset -

reset

public void reset()

从类复制的说明: SM4BaseCipher

reset some parameters after encryption

覆盖:

reset 在类中 StreamModeBaseCipher