org.openeuler.sm4.mode

类 OCB

java.lang.Object

javax.crypto.CipherSpi

org.openeuler.sm4.SM4BaseCipher

org.openeuler.sm4.StreamModeBaseCipher

org.openeuler.sm4.mode.OCB

public class OCB
extends StreamModeBaseCipher

SM4 OCB mode refer to RFC7253

字段概要

字段

限定符和类型	字段和说明
private byte[]	aad
private byte	bottom
private byte[]	checkSum
private int	defaultIvLen
private byte[]	H
private byte[]	ktop
private byte[][]	L
private byte[]	L_$
private byte[]	L_0
private byte[]	nonce
private byte[]	offset
private byte[]	stretch
private byte[]	tag
private int	tLen

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
OCB()

方法概要

限定符和类型	方法和说明
private void	checkMac(byte[] T, byte[] _T) determine whether the authentication tag is consistent
private void	checkTagLen(GCMParameterSpec gcmParam) check if the mac size is valid
private void	decrypt(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) decrypt and check the authentication tag
private byte[]	double_(byte[] h) refer to RFC7253 double
private void	encrypt(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) OCB encrypt and generate authentication tag
byte[]	engineDoFinal(byte[] input, int inputOffset, int inputLen)
int	engineDoFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
int	engineGetOutputSize(int inputLen)
AlgorithmParameters	engineGetParameters()
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)
void	engineSetPadding(String padding)
byte[]	engineUpdate(byte[] input, int inputOffset, int inputLen)
int	engineUpdate(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
protected void	engineUpdateAAD(byte[] src, int offset, int len)
private int	getI(byte[] arr, int i) get i-th bit of arr
private byte[]	hash() hash function
private void	init() init
private void	initL(int m) init L
private byte[]	moveLeftOneBit(byte[] input) move to left one bit
private int	ntz(int num) The number of trailing zero bits in the base-2 representation of the positive integer n.
private void	processOCB(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset) encrypt(decrypt) entire blocks of data
void	reset() reset some parameters after encryption
private void	setI(byte[] arr, int i, int target) set arr i-th bit to target

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

engineGetIV

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

engineGetBlockSize, engineSetMode, 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

字段详细资料

aad

private byte[] aad

defaultIvLen

private int defaultIvLen

tLen

private int tLen

H

private byte[] H

L_$

private byte[] L_$

L

private byte[][] L

L_0

private byte[] L_0

nonce

private byte[] nonce

checkSum

private byte[] checkSum

offset

private byte[] offset

ktop

private byte[] ktop

bottom

private byte bottom

stretch

private byte[] stretch

tag

private byte[] tag

构造器详细资料

OCB

public OCB()

方法详细资料

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

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

engineUpdateAAD

protected void engineUpdateAAD(byte[] src,
                               int offset,
                               int len)

覆盖:

engineUpdateAAD 在类中 SM4BaseCipher

engineGetOutputSize

public int engineGetOutputSize(int inputLen)

覆盖:

engineGetOutputSize 在类中 SM4BaseCipher

engineSetPadding

public void engineSetPadding(String padding)
                      throws NoSuchPaddingException

覆盖:

engineSetPadding 在类中 SM4BaseCipher

抛出:

NoSuchPaddingException

engineGetParameters

public AlgorithmParameters engineGetParameters()

覆盖:

engineGetParameters 在类中 StreamModeBaseCipher

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

processOCB

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

encrypt(decrypt) entire blocks of data

参数:

input -

inputOffset -

inputLen -

output -

outputOffset -

hash

private byte[] hash()

hash function

返回:

the result of hash

double_

private byte[] double_(byte[] h)

refer to RFC7253 double

参数:

h - :input

返回:

moveLeftOneBit

private byte[] moveLeftOneBit(byte[] input)

move to left one bit

参数:

input - to be moved byte array.

返回:

result after moving

ntz

private int ntz(int num)

The number of trailing zero bits in the base-2 representation of the positive integer n.

返回:

init

private void init()

init

initL

private void initL(int m)

init L

参数:

m -

encrypt

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

OCB encrypt and generate authentication tag

参数:

input -

inputOffset -

inputLen -

output -

outputOffset -

decrypt

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

decrypt and check the authentication tag

参数:

input -

inputOffset -

inputLen -

output -

outputOffset -

getI

private int getI(byte[] arr,
                 int i)

get i-th bit of arr

参数:

arr -

返回:

1 or 0

setI

private void setI(byte[] arr,
                  int i,
                  int target)

set arr i-th bit to target

参数:

i -

target - 0 or 1

checkTagLen

private void checkTagLen(GCMParameterSpec gcmParam)
                  throws InvalidAlgorithmParameterException

check if the mac size is valid

参数:

gcmParam -

抛出:

InvalidAlgorithmParameterException

checkMac

private void checkMac(byte[] T,
                      byte[] _T)

determine whether the authentication tag is consistent

参数:

T -

_T -

reset

public void reset()

从类复制的说明: SM4BaseCipher

reset some parameters after encryption

覆盖:

reset 在类中 StreamModeBaseCipher