org.apache.sshd.common.cipher

Class ChaCha20Cipher.ChaChaEngine

java.lang.Object

org.apache.sshd.common.cipher.ChaCha20Cipher.ChaChaEngine

Enclosing class:

ChaCha20Cipher

protected static class ChaCha20Cipher.ChaChaEngine
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
private static int	BLOCK_BYTES
private static int	BLOCK_INTS
private static int	COUNTER_OFFSET
private static int[]	ENGINE_STATE_HEADER
protected int[]	engineState
protected long	initialNonce
private static int	KEY_BYTES
private static int	KEY_INTS
private static int	KEY_OFFSET
protected byte[]	nonce
private static int	NONCE_BYTES
private static int	NONCE_INTS
private static int	NONCE_OFFSET
protected int[]	x

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ChaChaEngine()

Method Summary

Modifier and Type	Method and Description
protected void	advanceNonce()
protected static void	columnRound(int[] state)
protected void	crypt(byte[] in, int offset, int length, byte[] out, int outOffset)
protected static void	diagonalRound(int[] state)
protected void	initCounter(long counter)
protected void	initKey(byte[] key)
protected void	initNonce(byte[] nonce)
private static void	packIntLE(int value, byte[] dst, int off, int len)
protected static void	permute(int[] state)
protected byte[]	polyKey()
protected static void	quarterRound(int[] state, int a, int b, int c, int d)
private static int	unpackIntLE(byte[] buf, int off)
private static int	unpackIntLE(byte[] buf, int off, int len)
private static void	unpackIntsLE(byte[] buf, int off, int nrInts, int[] dst, int dstOff)
private static int[]	unpackSigmaString(byte[] buf)

Methods inherited from class java.lang.Object

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

Field Detail

BLOCK_BYTES

private static final int BLOCK_BYTES

See Also:

Constant Field Values

BLOCK_INTS

private static final int BLOCK_INTS

See Also:

Constant Field Values

KEY_OFFSET

private static final int KEY_OFFSET

See Also:

Constant Field Values

KEY_BYTES

private static final int KEY_BYTES

See Also:

Constant Field Values

KEY_INTS

private static final int KEY_INTS

See Also:

Constant Field Values

COUNTER_OFFSET

private static final int COUNTER_OFFSET

See Also:

Constant Field Values

NONCE_OFFSET

private static final int NONCE_OFFSET

See Also:

Constant Field Values

NONCE_BYTES

private static final int NONCE_BYTES

See Also:

Constant Field Values

NONCE_INTS

private static final int NONCE_INTS

See Also:

Constant Field Values

ENGINE_STATE_HEADER

private static final int[] ENGINE_STATE_HEADER

x

protected final int[] x

engineState

protected final int[] engineState

nonce

protected final byte[] nonce

initialNonce

protected long initialNonce

Constructor Detail

ChaChaEngine

protected ChaChaEngine()

Method Detail

initKey

protected void initKey(byte[] key)

initNonce

protected void initNonce(byte[] nonce)

advanceNonce

protected void advanceNonce()

initCounter

protected void initCounter(long counter)

crypt

protected void crypt(byte[] in,
                     int offset,
                     int length,
                     byte[] out,
                     int outOffset)

polyKey

protected byte[] polyKey()

permute

protected static void permute(int[] state)

columnRound

protected static void columnRound(int[] state)

diagonalRound

protected static void diagonalRound(int[] state)

quarterRound

protected static void quarterRound(int[] state,
                                   int a,
                                   int b,
                                   int c,
                                   int d)

unpackIntLE

private static int unpackIntLE(byte[] buf,
                               int off)

unpackIntLE

private static int unpackIntLE(byte[] buf,
                               int off,
                               int len)

unpackIntsLE

private static void unpackIntsLE(byte[] buf,
                                 int off,
                                 int nrInts,
                                 int[] dst,
                                 int dstOff)

unpackSigmaString

private static int[] unpackSigmaString(byte[] buf)

packIntLE

private static void packIntLE(int value,
                              byte[] dst,
                              int off,
                              int len)