Class ChaCha20Cipher.ChaChaEngine

java.lang.Object

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

Enclosing class:

ChaCha20Cipher

protected static class ChaCha20Cipher.ChaChaEngine
extends Object

Field Summary

Fields

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

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ChaChaEngine()

Method Summary

Modifier and Type	Method	Description
protected void	advanceNonce()
protected void	crypt(byte[] in, int offset, int length, byte[] out, int outOffset)
protected void	initCounter(long counter)
protected void	initKey(byte[] key)
protected void	initNonce(byte[] nonce)
protected byte[]	polyKey()
protected void	setKeyStream(int[] engine)
private static void	unpackIntsLE(byte[] buf, int off, int nrInts, int[] dst, int dstOff)
private static int[]	unpackSigmaString(byte[] buf)

Methods inherited from class Object

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

Field Details

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

ENGINE_STATE_HEADER

private static final int[] ENGINE_STATE_HEADER

engineState

protected final int[] engineState

keyStream

protected final byte[] keyStream

nonce

protected final byte[] nonce

initialNonce

protected long initialNonce

nonceVal

protected long nonceVal

Constructor Details

ChaChaEngine

protected ChaChaEngine()

Method Details

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()

setKeyStream

protected void setKeyStream(int[] engine)

unpackIntsLE

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

unpackSigmaString

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