Package com.southernstorm.noise.protocol

Class Noise

java.lang.Object

com.southernstorm.noise.protocol.Noise

public final class Noise
extends Object

Utility functions for the Noise protocol library.

Field Summary

Fields

Modifier and Type	Field	Description
static int	MAX_PACKET_LEN	Maximum length for Noise packets.

Constructor Summary

Constructors

Constructor	Description
Noise()

Method Summary

Modifier and Type	Method	Description
(package private) static byte[]	copySubArray(byte[] data, int offset, int length)	Makes a copy of part of an array.
static CipherState	createCipher(String name)	Creates a cipher object from its Noise protocol name.
static MessageDigest	createHash(String name)	Creates a hash object from its Noise protocol name.
(package private) static void	destroy(byte[] array)	Destroys the contents of a byte array.
(package private) static void	throwBadTagException()	Throws an instance of AEADBadTagException.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_PACKET_LEN

public static final int MAX_PACKET_LEN

Maximum length for Noise packets.

See Also:

Constant Field Values

Constructor Detail

Noise

public Noise()

Method Detail

createCipher

public static CipherState createCipher(String name)
                                throws NoSuchAlgorithmException

Creates a cipher object from its Noise protocol name.

Parameters:

name - The name of the cipher algorithm; e.g. "AESGCM", "ChaChaPoly", etc.

Returns:

The cipher object if the name is recognized.

Throws:

NoSuchAlgorithmException - The name is not recognized as a valid Noise protocol name, or there is no cryptography provider in the system that implements the algorithm.

createHash

public static MessageDigest createHash(String name)
                                throws NoSuchAlgorithmException

Creates a hash object from its Noise protocol name.

Parameters:

name - The name of the hash algorithm; e.g. "SHA256", "BLAKE2s", etc.

Returns:

The hash object if the name is recognized.

Throws:

NoSuchAlgorithmException - The name is not recognized as a valid Noise protocol name, or there is no cryptography provider in the system that implements the algorithm.

destroy

static void destroy(byte[] array)

Destroys the contents of a byte array.

Parameters:

array - The array whose contents should be destroyed.

copySubArray

static byte[] copySubArray(byte[] data,
                           int offset,
                           int length)

Makes a copy of part of an array.

Parameters:

data - The buffer containing the data to copy.

offset - Offset of the first byte to copy.

length - The number of bytes to copy.

Returns:

A new array with a copy of the sub-array.

throwBadTagException

static void throwBadTagException()
                          throws BadPaddingException

Throws an instance of AEADBadTagException.

Throws:

BadPaddingException - The AEAD exception. If the underlying JDK does not have the AEADBadTagException class, then this function will instead throw an instance of the superclass BadPaddingException.