com.jn.langx.security.messagedigest.digest

类 GeneralDigest

java.lang.Object

com.jn.langx.security.messagedigest.digest.GeneralDigest

所有已实现的接口:

Digest, ExtendedDigest, Memoable

直接已知子类:

SM3Digest

public abstract class GeneralDigest
extends Object
implements ExtendedDigest, Memoable

base implementation of MD4 family style digest as outlined in "Handbook of Applied Cryptography", pages 344 - 347.

构造器概要

构造器

限定符	构造器和说明
protected	GeneralDigest() Standard constructor
protected	GeneralDigest(byte[] encodedState)
protected	GeneralDigest(GeneralDigest t) Copy constructor.

方法概要

限定符和类型	方法和说明
protected void	copyIn(GeneralDigest t)
void	finish()
int	getByteLength() Return the size in bytes of the internal buffer the digest applies it's compression function to.
protected void	populateState(byte[] state)
protected abstract void	processBlock()
protected abstract void	processLength(long bitLength)
protected abstract void	processWord(byte[] in, int inOff)
void	reset() reset the digest back to it's initial state.
void	update(byte in) update the message digest with a single byte.
void	update(byte[] in, int inOff, int len) update the message digest with a block of bytes.

从类继承的方法 java.lang.Object

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

从接口继承的方法 com.jn.langx.security.messagedigest.digest.Digest

doFinal, getAlgorithmName, getDigestSize

从接口继承的方法 com.jn.langx.util.Memoable

copy, reset

构造器详细资料

GeneralDigest

protected GeneralDigest()

Standard constructor

GeneralDigest

protected GeneralDigest(GeneralDigest t)

Copy constructor. We are using copy constructors in place of the Object.clone() interface as this interface is not supported by J2ME.

GeneralDigest

protected GeneralDigest(byte[] encodedState)

方法详细资料

copyIn

protected void copyIn(GeneralDigest t)

update

public void update(byte in)

从接口复制的说明: Digest

update the message digest with a single byte.

指定者:

update 在接口中 Digest

参数:

in - the input byte to be entered.

update

public void update(byte[] in,
                   int inOff,
                   int len)

从接口复制的说明: Digest

update the message digest with a block of bytes.

指定者:

update 在接口中 Digest

参数:

in - the byte array containing the data.

inOff - the offset into the byte array where the data starts.

len - the length of the data.

finish

public void finish()

reset

public void reset()

从接口复制的说明: Digest

reset the digest back to it's initial state.

指定者:

reset 在接口中 Digest

populateState

protected void populateState(byte[] state)

getByteLength

public int getByteLength()

从接口复制的说明: ExtendedDigest

Return the size in bytes of the internal buffer the digest applies it's compression function to.

指定者:

getByteLength 在接口中 ExtendedDigest

返回:

byte length of the digests internal buffer.

processWord

protected abstract void processWord(byte[] in,
                                    int inOff)

processLength

protected abstract void processLength(long bitLength)

processBlock

protected abstract void processBlock()