com.jn.langx.security.crypto.digest.internal

接口 Digest

所有已知子接口:

Xof

所有已知实现类:

_AbstractLongDigest, _KeccakDigest, _MD2Digest, _MD4Digest, _MD5Digest, _SHA1Digest, _SHA224Digest, _SHA256Digest, _SHA384Digest, _SHA3Digest, _SHA512Digest, _SHA512tDigest, _SM3Digest, _WhirlpoolDigest, GeneralDigest

public interface Digest

interface that a message digest conforms to.

这是一套自定义的 digest 规范，跟官方接口 MessageDigest 没有关系

方法概要

限定符和类型	方法和说明
int	doFinal(byte[] out, int outOff) close the digest, producing the final digest value.
String	getAlgorithmName() return the algorithm name
int	getBufferSize() Return the size in bytes of the internal buffer the digest applies it's compression function to.
int	getDigestSize() return the size, in bytes, of the digest produced by this message digest.
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.

方法详细资料

getAlgorithmName

String getAlgorithmName()

return the algorithm name

返回:

the algorithm name

getDigestSize

int getDigestSize()

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.

getBufferSize

int getBufferSize()

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

返回:

byte length of the digests internal buffer.

update

void update(byte in)

update the message digest with a single byte.

参数:

in - the input byte to be entered.

update

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

update the message digest with a block of bytes.

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.

doFinal

int doFinal(byte[] out,
            int outOff)

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.

reset

void reset()

reset the digest back to it's initial state.