org.openeuler.sm4.mode

类 CTR

java.lang.Object

javax.crypto.CipherSpi

org.openeuler.sm4.SM4BaseCipher

org.openeuler.sm4.StreamModeBaseCipher

org.openeuler.sm4.mode.CTR

public class CTR
extends StreamModeBaseCipher

SM4 CTR 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
CTR()

方法概要

限定符和类型	方法和说明
private void	decrypt(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) decrypt without handling padding
private void	encrypt(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) encrypt with handling padding
byte[]	engineDoFinal(byte[] input, int inputOffset, int inputLen)
int	engineDoFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
int	engineGetOutputSize(int inputLen)
void	engineInit(int opmode, Key key, AlgorithmParameterSpec params, SecureRandom random)
void	engineInit(int opmode, Key key, AlgorithmParameters params, SecureRandom random)
void	engineInit(int opmode, Key key, SecureRandom random)
byte[]	engineUpdate(byte[] input, int inputOffset, int inputLen)
int	engineUpdate(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
private byte	increment(int index) determines whether the binary bit of counter[index] contains zeros if it contains zero, it changes the rightmost zero to 1 and all binary positions to its right to 0 if it does not contain 0, it throws an exception
private void	incrementCount() implement counter increment
private void	processCTR(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) encrypt(decrypt) entire blocks of data
void	reset() reset some parameters after encryption

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

engineGetIV, engineGetParameters

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

engineGetBlockSize, 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

CTR

public CTR()

方法详细资料

engineInit

public void engineInit(int opmode,
                       Key key,
                       SecureRandom random)
                throws InvalidKeyException

覆盖:

engineInit 在类中 StreamModeBaseCipher

抛出:

InvalidKeyException

engineInit

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

覆盖:

engineInit 在类中 StreamModeBaseCipher

抛出:

InvalidKeyException

InvalidAlgorithmParameterException

engineInit

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

覆盖:

engineInit 在类中 StreamModeBaseCipher

抛出:

InvalidKeyException

InvalidAlgorithmParameterException

engineGetOutputSize

public int engineGetOutputSize(int inputLen)

覆盖:

engineGetOutputSize 在类中 SM4BaseCipher

engineUpdate

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

覆盖:

engineUpdate 在类中 SM4BaseCipher

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

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

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 -

decrypt

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

decrypt without handling padding

参数:

input -

inputOffset -

inputLen -

output -

outputOffset -

incrementCount

private void incrementCount()

implement counter increment

increment

private byte increment(int index)
                throws Exception

determines whether the binary bit of counter[index] contains zeros if it contains zero, it changes the rightmost zero to 1 and all binary positions to its right to 0 if it does not contain 0, it throws an exception

参数:

index -

返回:

value of counter[index] after the change

抛出:

Exception

processCTR

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

encrypt(decrypt) 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