Class MD5InputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

java.security.DigestInputStream

org.nuiton.util.MD5InputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class MD5InputStream
extends DigestInputStream

MD5InputStream, a subclass of FilterInputStream implementing MD5 functionality on a stream.

Author:

Tony Chemit - chemit@codelutin.com

Field Summary

Fields

Modifier and Type	Field	Description
protected long	streamLength	length of readed stream

Fields inherited from class DigestInputStream

digest

Fields inherited from class FilterInputStream

in

Constructor Summary

Constructors

Constructor	Description
MD5InputStream(InputStream in)	Creates a MD5InputStream

Method Summary

Modifier and Type	Method	Description
protected static MessageDigest	getMD5Digest()
long	getStreamLength()
byte[]	hash()	Returns array of bytes representing hash of the stream as finalized for the current state.
static byte[]	hash(File input)	Compute the MD5 for the given input file.
static byte[]	hash(InputStream input)	Compute the MD5 for the given input.
static byte[]	hash(String input)	Compute the MD5 for the given input sring.
int	read()
int	read(byte[] bytes, int offset, int length)

Methods inherited from class DigestInputStream

getMessageDigest, on, setMessageDigest, toString

Methods inherited from class FilterInputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class Object

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

Field Details

streamLength

protected long streamLength

length of readed stream

Constructor Details

MD5InputStream

public MD5InputStream(InputStream in)

Creates a MD5InputStream

Parameters:

in - The input stream

Method Details

getMD5Digest

protected static MessageDigest getMD5Digest()
                                     throws IllegalStateException

Throws:

IllegalStateException

hash

public static byte[] hash(InputStream input)
                   throws IOException

Compute the MD5 for the given input. Note: The the stream will be closed after calling the method even if something was wrong.

Parameters:

input - the stream to parse

Returns:

the MD5 hash for the given input stream

Throws:

IOException - if any pb while reading in stream or digest

hash

public static byte[] hash(File input)
                   throws IOException

Compute the MD5 for the given input file.

Parameters:

input - the File stream to parse

Returns:

the MD5 hash for the given input File

Throws:

IOException - if any pb while reading in stream or digest

hash

public static byte[] hash(String input)
                   throws IOException

Compute the MD5 for the given input sring.

Parameters:

input - the stream to parse

Returns:

the MD5 hash for the given input String

Throws:

IOException - if any pb while reading in stream or digest

read

public int read()
         throws IOException

Overrides:

read in class DigestInputStream

Throws:

IOException

read

public int read(byte[] bytes,
 int offset,
 int length)
         throws IOException

Overrides:

read in class DigestInputStream

Throws:

IOException

hash

public byte[] hash()

Returns array of bytes representing hash of the stream as finalized for the current state.

Returns:

hash

See Also:

• MessageDigest.digest()

getStreamLength

public long getStreamLength()