Class ChachaPolyCipher

java.lang.Object

net.schmizz.sshj.transport.cipher.BaseCipher

com.hierynomus.sshj.transport.cipher.ChachaPolyCipher

All Implemented Interfaces:

Cipher

public class ChachaPolyCipher
extends BaseCipher

Nested Class Summary

Nested classes/interfaces inherited from interface Cipher

Cipher.Mode

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	AAD_LENGTH
protected Cipher	aadCipher
protected Key	aadCipherKey
private final int	authSize
private static final int	CHACHA_KEY_SIZE
private static final String	CIPHER_CHACHA
protected Key	cipherKey
private byte[]	encryptedAad
protected Mac	mac
private static final String	MAC_POLY1305
protected Cipher.Mode	mode
private static final byte[]	POLY_KEY_INPUT
private static final int	POLY_TAG_LENGTH

Fields inherited from class BaseCipher

cipher

Constructor Summary

Constructors

Constructor	Description
ChachaPolyCipher(int authSize, int bsize, String algorithm)

Method Summary

Modifier and Type	Method	Description
int	getAuthenticationTagSize()
protected void	initCipher(Cipher cipher, Cipher.Mode mode, byte[] key, byte[] iv)
private byte[]	longToBytes(long lng)
void	setSequenceNumber(long seq)
void	update(byte[] input, int inputOffset, int inputLen)	Performs in-place encryption or decryption on the given data.
void	updateAAD(byte[] data)	Adds the provided input data as additional authenticated data during encryption or decryption.
void	updateAAD(byte[] data, int offset, int length)	Adds the provided input data as additional authenticated data during encryption or decryption.

Methods inherited from class BaseCipher

getBlockSize, getIVSize, getKeySpec, getMode, init, updateWithAAD

Methods inherited from class Object

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

Field Details

CHACHA_KEY_SIZE

private static final int CHACHA_KEY_SIZE

See Also:

• Constant Field Values

AAD_LENGTH

private static final int AAD_LENGTH

See Also:

• Constant Field Values

POLY_TAG_LENGTH

private static final int POLY_TAG_LENGTH

See Also:

• Constant Field Values

CIPHER_CHACHA

private static final String CIPHER_CHACHA

See Also:

• Constant Field Values

MAC_POLY1305

private static final String MAC_POLY1305

See Also:

• Constant Field Values

POLY_KEY_INPUT

private static final byte[] POLY_KEY_INPUT

authSize

private final int authSize

encryptedAad

private byte[] encryptedAad

mode

protected Cipher.Mode mode

aadCipher

protected Cipher aadCipher

mac

protected Mac mac

cipherKey

protected Key cipherKey

aadCipherKey

protected Key aadCipherKey

Constructor Details

ChachaPolyCipher

public ChachaPolyCipher(int authSize,
 int bsize,
 String algorithm)

Method Details

getAuthenticationTagSize

public int getAuthenticationTagSize()

Specified by:

getAuthenticationTagSize in interface Cipher

Overrides:

getAuthenticationTagSize in class BaseCipher

Returns:

Size of the authentication tag (AT) in bytes or 0 if this cipher does not support authentication

setSequenceNumber

public void setSequenceNumber(long seq)

Specified by:

setSequenceNumber in interface Cipher

Overrides:

setSequenceNumber in class BaseCipher

initCipher

protected void initCipher(Cipher cipher,
 Cipher.Mode mode,
 byte[] key,
 byte[] iv)

Specified by:

initCipher in class BaseCipher

updateAAD

public void updateAAD(byte[] data,
 int offset,
 int length)

Description copied from interface: Cipher

Adds the provided input data as additional authenticated data during encryption or decryption.

Specified by:

updateAAD in interface Cipher

Overrides:

updateAAD in class BaseCipher

Parameters:

data - The additional data to authenticate

offset - The offset of the additional data in the buffer

length - The number of bytes in the buffer to use for authentication

updateAAD

public void updateAAD(byte[] data)

Description copied from interface: Cipher

Adds the provided input data as additional authenticated data during encryption or decryption.

Specified by:

updateAAD in interface Cipher

Overrides:

updateAAD in class BaseCipher

Parameters:

data - The data to authenticate

update

public void update(byte[] input,
 int inputOffset,
 int inputLen)

Description copied from interface: Cipher

Performs in-place encryption or decryption on the given data.

Specified by:

update in interface Cipher

Overrides:

update in class BaseCipher

Parameters:

input - the subject

inputOffset - offset at which to start

inputLen - number of bytes starting at inputOffset

longToBytes

private byte[] longToBytes(long lng)