com.sshtools.common.ssh.components.jce

Class ChaCha20Poly1305

java.lang.Object

com.sshtools.common.ssh.components.SshCipher

com.sshtools.common.ssh.components.jce.ChaCha20Poly1305

All Implemented Interfaces:

SshComponent, SecureComponent

public class ChaCha20Poly1305
extends SshCipher

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ChaCha20Poly1305.ChaCha20
static class	ChaCha20Poly1305.Poly1305 Poly1305 message authentication code, designed by D.

Field Summary

Fields inherited from class com.sshtools.common.ssh.components.SshCipher

DECRYPT_MODE, ENCRYPT_MODE

Constructor Summary

Constructors

Constructor and Description
ChaCha20Poly1305()

Method Summary

Modifier and Type	Method and Description
int	getBlockSize() Get the cipher block size.
int	getKeyLength() Return the key length required
int	getMacLength()
java.lang.String	getProviderName()
void	init(int mode, byte[] iv, byte[] keydata) Initialize the cipher with up to 40 bytes of iv and key data.
protected static void	intToLittleEndian(int n, byte[] bs, int off)
boolean	isMAC()
protected static int	littleEndianToInt(byte[] bs, int i)
long	readPacketLength(byte[] encoded, com.sshtools.common.util.UnsignedInteger64 sequenceNo)
void	transform(byte[] src, int start, byte[] dest, int offset, int len) Transform the byte array according to the cipher mode; it is legal for the source and destination arrays to reference the same physical array so care should be taken in the transformation process to safeguard this rule.
byte[]	writePacketLength(int length, com.sshtools.common.util.UnsignedInteger64 sequenceNo)

Methods inherited from class com.sshtools.common.ssh.components.SshCipher

getAlgorithm, getPriority, getSecurityLevel, transform

Methods inherited from class java.lang.Object

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

Constructor Detail

ChaCha20Poly1305

public ChaCha20Poly1305()
                 throws java.io.IOException

Throws:

java.io.IOException

Method Detail

init

public void init(int mode,
                 byte[] iv,
                 byte[] keydata)
          throws java.io.IOException

Description copied from class: SshCipher

Initialize the cipher with up to 40 bytes of iv and key data. Each implementation should take as much data from the initialization as it needs ignoring any data that it does not require.

Specified by:

init in class SshCipher

Parameters:

mode - the mode to operate

iv - the initiaization vector

keydata - the key data

Throws:

java.io.IOException

getBlockSize

public int getBlockSize()

Description copied from class: SshCipher

Get the cipher block size.

Specified by:

getBlockSize in class SshCipher

Returns:

the block size in bytes.

getKeyLength

public int getKeyLength()

Description copied from class: SshCipher

Return the key length required

Specified by:

getKeyLength in class SshCipher

Returns:

getMacLength

public int getMacLength()

Overrides:

getMacLength in class SshCipher

isMAC

public boolean isMAC()

Overrides:

isMAC in class SshCipher

transform

public void transform(byte[] src,
                      int start,
                      byte[] dest,
                      int offset,
                      int len)
               throws java.io.IOException

Description copied from class: SshCipher

Transform the byte array according to the cipher mode; it is legal for the source and destination arrays to reference the same physical array so care should be taken in the transformation process to safeguard this rule.

Specified by:

transform in class SshCipher

Throws:

java.io.IOException

getProviderName

public java.lang.String getProviderName()

Specified by:

getProviderName in class SshCipher

readPacketLength

public long readPacketLength(byte[] encoded,
                             com.sshtools.common.util.UnsignedInteger64 sequenceNo)
                      throws java.io.IOException

Throws:

java.io.IOException

writePacketLength

public byte[] writePacketLength(int length,
                                com.sshtools.common.util.UnsignedInteger64 sequenceNo)
                         throws java.io.IOException

Throws:

java.io.IOException

littleEndianToInt

protected static int littleEndianToInt(byte[] bs,
                                       int i)

intToLittleEndian

protected static void intToLittleEndian(int n,
                                        byte[] bs,
                                        int off)