com.jn.langx.security.messagedigest.digest.impl

类 SM3Digest

java.lang.Object

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

com.jn.langx.security.messagedigest.digest.impl.SM3Digest

所有已实现的接口:

Digest, ExtendedDigest, Memoable

public class SM3Digest
extends GeneralDigest

Implementation of Chinese SM3 digest as described at http://tools.ietf.org/html/draft-shen-sm3-hash-01 and at .... ( Chinese PDF )

The specification says "process a bit stream", but this is written to process bytes in blocks of 4, meaning this will process 32-bit word groups. But so do also most other digest specifications, including the SHA-256 which was a origin for this specification.

构造器概要

构造器

构造器和说明
SM3Digest() Standard constructor
SM3Digest(SM3Digest t) Copy constructor.

方法概要

限定符和类型	方法和说明
Memoable	copy() Produce a copy of this object with its configuration and in its current state.
int	doFinal(byte[] out, int outOff) close the digest, producing the final digest value.
String	getAlgorithmName() return the algorithm name
int	getDigestSize() return the size, in bytes, of the digest produced by this message digest.
protected void	processBlock()
protected void	processLength(long bitLength)
protected void	processWord(byte[] in, int inOff)
void	reset() reset the chaining variables
void	reset(Memoable other) Restore a copied object state into this object.

从类继承的方法 com.jn.langx.security.messagedigest.digest.GeneralDigest

copyIn, finish, getByteLength, populateState, update, update

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

SM3Digest

public SM3Digest()

Standard constructor

SM3Digest

public SM3Digest(SM3Digest t)

Copy constructor. This will copy the state of the provided message digest.

方法详细资料

getAlgorithmName

public String getAlgorithmName()

从接口复制的说明: Digest

return the algorithm name

返回:

the algorithm name

getDigestSize

public int getDigestSize()

从接口复制的说明: Digest

return the size, in bytes, of the digest produced by this message digest.

返回:

the size, in bytes, of the digest produced by this message digest.

copy

public Memoable copy()

从接口复制的说明: Memoable

Produce a copy of this object with its configuration and in its current state.

The returned object may be used simply to store the state, or may be used as a similar object starting from the copied state.

reset

public void reset(Memoable other)

从接口复制的说明: Memoable

Restore a copied object state into this object.

Implementations of this method should try to avoid or minimise memory allocation to perform the reset.

参数:

other - an object originally copied from an object of the same type as this instance.

reset

public void reset()

reset the chaining variables

指定者:

reset 在接口中 Digest

覆盖:

reset 在类中 GeneralDigest

doFinal

public int doFinal(byte[] out,
                   int outOff)

从接口复制的说明: Digest

close the digest, producing the final digest value. The doFinal call leaves the digest reset.

参数:

out - the array the digest is to be copied into.

outOff - the offset into the out array the digest is to start at.

processWord

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

指定者:

processWord 在类中 GeneralDigest

processLength

protected void processLength(long bitLength)

指定者:

processLength 在类中 GeneralDigest

processBlock

protected void processBlock()

指定者:

processBlock 在类中 GeneralDigest