io.nem.core.utils

Class ByteUtils

java.lang.Object

io.nem.core.utils.ByteUtils

public class ByteUtils
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ByteUtils()

Method Summary

Modifier and Type	Method and Description
static int	bytesToInt(byte[] bytes) Converts an array of 4 bytes into a int.
static long	bytesToLong(byte[] bytes) Converts an array of 8 bytes into a long.
static byte[]	intToBytes(int x) Converts an int value into an array of 4 bytes.
static int	isEqualConstantTime(int b, int c) Constant-time byte comparison.
static int	isNegativeConstantTime(int b) Constant-time check if byte is negative.
static byte[]	longToBytes(long x) Converts a long value into an array of 8 bytes.
static java.lang.String	toString(byte[] bytes) Creates a human readable representation of an array of bytes.

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteUtils

public ByteUtils()

Method Detail

bytesToLong

public static long bytesToLong(byte[] bytes)

Converts an array of 8 bytes into a long.

Parameters:

bytes - The bytes.

Returns:

The long.

longToBytes

public static byte[] longToBytes(long x)

Converts a long value into an array of 8 bytes.

Parameters:

x - The long.

Returns:

The bytes.

bytesToInt

public static int bytesToInt(byte[] bytes)

Converts an array of 4 bytes into a int.

Parameters:

bytes - The bytes.

Returns:

The int.

intToBytes

public static byte[] intToBytes(int x)

Converts an int value into an array of 4 bytes.

Parameters:

x - The int.

Returns:

The bytes.

isEqualConstantTime

public static int isEqualConstantTime(int b,
                                      int c)

Constant-time byte comparison. The constant time behavior eliminates side channel attacks.

Parameters:

b - One byte.

c - Another byte.

Returns:

1 if b and c are equal, 0 otherwise.

isNegativeConstantTime

public static int isNegativeConstantTime(int b)

Constant-time check if byte is negative. The constant time behavior eliminates side channel attacks.

Parameters:

b - The byte to check.

Returns:

1 if the byte is negative, 0 otherwise.

toString

public static java.lang.String toString(byte[] bytes)

Creates a human readable representation of an array of bytes.

Parameters:

bytes - The bytes.

Returns:

An string representation of the bytes.