anon.mixminion.message
Class Header

java.lang.Object
  anon.mixminion.message.Header

public class Header
extends java.lang.Object

Author:

Stefan Roenisch

Field Summary

private int	HASH_LEN
private int	HEADER_LEN
private byte[]	m_header
private int	MIN_SH
private int	PK_ENC_LEN
private int	PK_MAX_DATA_LEN
private int	PK_OVERHEAD_LEN
private byte[]	VERSION_MAJOR

Constructor Summary

Header(java.util.Vector path, java.util.Vector secrets, ExitInformation exitInfo)
CONSTRUCTOR

Method Summary

private byte[]	buildHeader(java.util.Vector path, java.util.Vector secrets, ExitInformation exitInfo) builds a header with the specified hops
byte[]	getAsByteArray() Gives back the header as byteArray
private byte[]	makeFSHS(byte[] v, byte[] sk, byte[] d, byte[] rs, short rt) fixed-size part of the subheader structure
private byte[]	makeSHS(byte[] V, byte[] SK, byte[] D, byte[] RS, short RT, byte[] RI) entire subheader
private int	max(int first, int second) Compares two int values and returns the larger one
private byte[]	pk_encrypt(MyRSAPublicKey key, byte[] m) PublicKey Encryption of
private byte[]	subKey(byte[] secretKey, java.lang.String phrase) Subkey

Methods inherited from class java.lang.Object

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

Field Detail

HEADER_LEN

private final int HEADER_LEN

See Also:

Constant Field Values

PK_ENC_LEN

private final int PK_ENC_LEN

See Also:

Constant Field Values

PK_OVERHEAD_LEN

private final int PK_OVERHEAD_LEN

See Also:

Constant Field Values

PK_MAX_DATA_LEN

private final int PK_MAX_DATA_LEN

See Also:

Constant Field Values

HASH_LEN

private final int HASH_LEN

See Also:

Constant Field Values

MIN_SH

private final int MIN_SH

See Also:

Constant Field Values

VERSION_MAJOR

private byte[] VERSION_MAJOR

m_header

private byte[] m_header

Constructor Detail

Header

public Header(java.util.Vector path,
              java.util.Vector secrets,
              ExitInformation exitInfo)

CONSTRUCTOR

Parameters:

hops -

recipient -

Method Detail

buildHeader

private byte[] buildHeader(java.util.Vector path,
                           java.util.Vector secrets,
                           ExitInformation exitInfo)

builds a header with the specified hops

Parameters:

hops - int

recipient - String

Returns:

Vector with byte[]-Objects

getAsByteArray

public byte[] getAsByteArray()

Gives back the header as byteArray

Returns:

header byte[]

subKey

private byte[] subKey(byte[] secretKey,
                      java.lang.String phrase)

Subkey

Parameters:

Secret - Key byte[]

phrase - String

Returns:

the subkey byte[]

makeFSHS

private byte[] makeFSHS(byte[] v,
                        byte[] sk,
                        byte[] d,
                        byte[] rs,
                        short rt)

fixed-size part of the subheader structure

Parameters:

version - byte[]

secretkey - byte[]

digest - byte[]

routingsize - byte[]

routingtype - byte[]

Returns:

part byte[]

makeSHS

private byte[] makeSHS(byte[] V,
                       byte[] SK,
                       byte[] D,
                       byte[] RS,
                       short RT,
                       byte[] RI)

entire subheader

Parameters:

Version - byte[]

SecretKey - byte[]

Digest - byte[]

RoutingSize - byte[]

RoutingType - byte[]

RoutingInformation - byte[]

Returns:

entire subheader byte[]

max

private int max(int first,
                int second)

Compares two int values and returns the larger one

Parameters:

first - int

second - int

Returns:

the larger one int

pk_encrypt

private byte[] pk_encrypt(MyRSAPublicKey key,
                          byte[] m)

PublicKey Encryption of

Parameters:

key - MyRSAPublicKey

m - byte[]

Returns:

the digest byte[]