Package net.i2p.router.transport.ntcp

Class OutboundNTCP2State

java.lang.Object

net.i2p.router.transport.ntcp.OutboundNTCP2State

All Implemented Interfaces:

EstablishState

class OutboundNTCP2State
extends Object
implements EstablishState

NTCP 2 only. We are Alice. Also contains static constants and methods used by InboundEstablishState for NTCP2. Does not extend EstablishBase.

Since:

0.9.35

Field Summary

Fields

Modifier and Type	Field	Description
static final int	IV_SIZE
static final int	KEY_SIZE
static final int	MAC_SIZE
static final long	MAX_SKEW	in SECONDS
static final int	MSG1_SIZE	64
static final int	MSG2_SIZE
static final int	MSG3P1_SIZE	48
static final int	OPTIONS1_SIZE
static final int	OPTIONS2_SIZE
static final int	TOTAL1_MAX	one less than 288 byte NTCP1 msg 1
static final byte[]	ZEROKEY

Constructor Summary

Constructors

Constructor	Description
OutboundNTCP2State(RouterContext ctx, NTCPTransport transport, NTCPConnection con)

Method Summary

Modifier and Type	Method	Description
void	close(String reason, Exception e)	Release resources on timeout.
protected void	fail(String reason)
protected void	fail(String reason, Exception e)
protected void	fail(String reason, Exception e, boolean bySkew)
(package private) static byte[][]	generateSipHashKeys(RouterContext ctx, HandshakeState state)	KDF for SipHash
int	getVersion()	Get the NTCP version
boolean	isComplete()	Don't synchronize this, deadlocks all over.
boolean	isCorrupt()	did the handshake fail for some reason?
void	prepareOutbound()	We are Alice.
void	receive(ByteBuffer src)	Parse the contents of the buffer as part of the handshake.
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

KEY_SIZE

public static final int KEY_SIZE

See Also:

• Constant Field Values

MAC_SIZE

public static final int MAC_SIZE

See Also:

• Constant Field Values

IV_SIZE

public static final int IV_SIZE

See Also:

• Constant Field Values

OPTIONS1_SIZE

public static final int OPTIONS1_SIZE

See Also:

• Constant Field Values

MSG1_SIZE

public static final int MSG1_SIZE

64

See Also:

• Constant Field Values

TOTAL1_MAX

public static final int TOTAL1_MAX

one less than 288 byte NTCP1 msg 1

See Also:

• Constant Field Values

OPTIONS2_SIZE

public static final int OPTIONS2_SIZE

See Also:

• Constant Field Values

MSG2_SIZE

public static final int MSG2_SIZE

See Also:

• Constant Field Values

MSG3P1_SIZE

public static final int MSG3P1_SIZE

48

See Also:

• Constant Field Values

MAX_SKEW

public static final long MAX_SKEW

in SECONDS

See Also:

• Constant Field Values

ZEROKEY

public static final byte[] ZEROKEY

Constructor Details

OutboundNTCP2State

public OutboundNTCP2State(RouterContext ctx,
 NTCPTransport transport,
 NTCPConnection con)

Throws:

IllegalArgumentException - on bad address in the con

Method Details

receive

public void receive(ByteBuffer src)

Parse the contents of the buffer as part of the handshake. All data must be copied out of the buffer as Reader.processRead() will return it to the pool.

Specified by:

receive in interface EstablishState

isCorrupt

public boolean isCorrupt()

did the handshake fail for some reason?

Specified by:

isCorrupt in interface EstablishState

isComplete

public boolean isComplete()

Don't synchronize this, deadlocks all over.

Specified by:

isComplete in interface EstablishState

Returns:

is the handshake complete and valid?

getVersion

public int getVersion()

Get the NTCP version

Specified by:

getVersion in interface EstablishState

Returns:

2

prepareOutbound

public void prepareOutbound()

We are Alice. We are establishing an outbound connection, so prepare ourselves by writing the first message in the handshake. Encrypt X and write X, the options block, and the padding. Save last half of encrypted X as IV for message 2 AES.

Specified by:

prepareOutbound in interface EstablishState

Throws:

IllegalStateException

generateSipHashKeys

static byte[][] generateSipHashKeys(RouterContext ctx,
 HandshakeState state)

KDF for SipHash

Returns:

rv[0] is sip_ab, rv[1] is sip_ba

close

public void close(String reason,
 Exception e)

Release resources on timeout.

Specified by:

close in interface EstablishState

Parameters:

e - may be null

Since:

0.9.16

fail

protected void fail(String reason)

fail

protected void fail(String reason,
 Exception e)

fail

protected void fail(String reason,
 Exception e,
 boolean bySkew)

toString

public String toString()

Overrides:

toString in class Object