Module jcifs

Package org.codelibs.jcifs.smb1.util

Class RC4

java.lang.Object

org.codelibs.jcifs.smb1.util.RC4

public class RC4
extends Object

Implementation of the RC4 (ARCFOUR) stream cipher algorithm. This class provides RC4 encryption/decryption functionality used in SMB1 protocol operations.

Constructor Summary

Constructors

Constructor	Description
RC4()	Default constructor for RC4 cipher.
RC4(byte[] key)	Constructs and initializes an RC4 cipher with the specified key.

Method Summary

Modifier and Type	Method	Description
void	init(byte[] key, int ki, int klen)	Initializes the RC4 cipher with a key.
void	update(byte[] src, int soff, int slen, byte[] dst, int doff)	Encrypts or decrypts data using the RC4 stream cipher.

Methods inherited from class java.lang.Object

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

Constructor Details

RC4

public RC4()

Default constructor for RC4 cipher. Call init() to initialize with a key before use.

RC4

public RC4(byte[] key)

Constructs and initializes an RC4 cipher with the specified key.

Parameters:

key - the encryption key

Method Details

init

public void init(byte[] key,
 int ki,
 int klen)

Initializes the RC4 cipher with a key. This method sets up the RC4 state array using the key scheduling algorithm.

Parameters:

key - the key array

ki - the starting offset in the key array

klen - the length of the key to use

update

public void update(byte[] src,
 int soff,
 int slen,
 byte[] dst,
 int doff)

Encrypts or decrypts data using the RC4 stream cipher. Since RC4 is a stream cipher, the same operation is used for both encryption and decryption.

Parameters:

src - the source data array

soff - the offset in the source array

slen - the length of data to process

dst - the destination array for the result

doff - the offset in the destination array