Package emissary.kff

Class Ssdeep

java.lang.Object

emissary.kff.Ssdeep

public final class Ssdeep
extends Object

A java port of the ssdeep code for "fuzzy hashing". http://ssdeep.sourceforge.net There are a number of ports out there that all look basically the same. This one is from https://opensourceprojects.eu/p/triplecheck/code/23/tree/tool/src/ssdeep/ A new ssdeep hash gets calculated and saved at each level of unwrapping.

Field Summary

Fields

Modifier and Type	Field	Description
static int	FUZZY_MAX_RESULT

Constructor Summary

Constructors

Constructor	Description
Ssdeep()

Method Summary

Modifier and Type	Method	Description
int	compare(SpamSumSignature signature1, SpamSumSignature signature2)	Given two spamsum signature return a value indicating the degree to which they match.
String	fuzzyHash(byte[] data)	Calculate the SpamSum hash for a byte array.
String	fuzzyHash(SeekableByteChannelFactory sbcf)
String	fuzzyHashFile(File file)	Calculates the SpamSum hash for specified stream.
String	fuzzyHashFile(String fileName)	Calculates the SpamSum hash for specified file.
static void	main(String[] args)

Methods inherited from class java.lang.Object

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

Field Detail

FUZZY_MAX_RESULT

public static final int FUZZY_MAX_RESULT

See Also:

Constant Field Values

Constructor Detail

Ssdeep

public Ssdeep()

Method Detail

fuzzyHash

public String fuzzyHash(byte[] data)

Calculate the SpamSum hash for a byte array.

Parameters:

data - The bytes to be hashed.

Returns:

The SpamSum signature for the bytes.

fuzzyHash

public String fuzzyHash(SeekableByteChannelFactory sbcf)

fuzzyHashFile

public String fuzzyHashFile(File file)
                     throws IOException

Calculates the SpamSum hash for specified stream.

Parameters:

file - The input file to be hashed.

Returns:

The SpamSum signature for the file.

Throws:

IOException - If there is some I/O problem accessing the file.

fuzzyHashFile

public String fuzzyHashFile(String fileName)
                     throws IOException

Calculates the SpamSum hash for specified file.

Parameters:

fileName - The path to the file to be hashed.

Returns:

The SpamSum signature for the file.

Throws:

IOException - If there is some I/O problem accessing the file.

compare

public int compare(@Nullable
                   SpamSumSignature signature1,
                   @Nullable
                   SpamSumSignature signature2)

Given two spamsum signature return a value indicating the degree to which they match.

Parameters:

signature1 - The first signature.

signature2 - The second signature.

Returns:

The score for the two signatures. The value is in the range 0..100, where 0 is a terrible match and 100 is a great match.

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception