com.ds.common.md5

类 MD5OutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

com.ds.common.md5.MD5OutputStream

所有已实现的接口:

Closeable, Flushable, AutoCloseable

public class MD5OutputStream
extends FilterOutputStream

Implements MD5 functionality on a stream. More information about this class is available from ostermiller.org.

This class produces a 128-bit "fingerprint" or "message digest" for all data written to this stream. It is conjectured that it is computationally infeasible to produce two messages having the same message digest, or to produce any message having a given pre-specified target message digest. The MD5 algorithm is intended for digital signature applications, where a large file must be "compressed" in a secure manner before being encrypted with a private (secret) key under a public-key cryptosystem such as RSA.

For more information see RFC1321.

从以下版本开始:

ostermillerutils 1.00.00

作者:

Santeri Paavolainen http://santtu.iki.fi/md5/, Stephen Ostermiller http://ostermiller.org/contact.pl?regarding=Java+Utilities

另请参阅:

MD5, MD5InputStream

字段概要

从类继承的字段 java.io.FilterOutputStream

out

构造器概要

构造器

构造器和说明
MD5OutputStream(OutputStream out) Creates MD5OutputStream

方法概要

限定符和类型	方法和说明
byte[]	getHash() Returns array of bytes representing hash of the stream so far.
String	getHashString() Get a 32-character hex representation representing hash of the stream so far.
void	write(byte[] b, int off, int len) Writes length bytes from the specified byte array starting a offset off to this output stream.
void	write(int b) Writes the specified byte to this output stream.

从类继承的方法 java.io.FilterOutputStream

close, flush, write

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

MD5OutputStream

public MD5OutputStream(OutputStream out)

Creates MD5OutputStream

参数:

out - The output stream

从以下版本开始:

ostermillerutils 1.00.00

方法详细资料

write

public void write(int b)
           throws IOException

Writes the specified byte to this output stream.

覆盖:

write 在类中 FilterOutputStream

参数:

b - the byte.

抛出:

IOException - if an I/O error occurs.

从以下版本开始:

ostermillerutils 1.00.00

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Writes length bytes from the specified byte array starting a offset off to this output stream.

覆盖:

write 在类中 FilterOutputStream

参数:

b - the data.

off - the start offset in the data.

len - the number of bytes to write.

抛出:

IOException - if an I/O error occurs.

从以下版本开始:

ostermillerutils 1.00.00

getHash

public byte[] getHash()

Returns array of bytes representing hash of the stream so far.

返回:

Array of 16 bytes, the hash of all written bytes.

从以下版本开始:

ostermillerutils 1.00.00

getHashString

public String getHashString()

Get a 32-character hex representation representing hash of the stream so far.

返回:

A string containing the hash of all written bytes.

从以下版本开始:

ostermillerutils 1.00.00