CryptoRandom

java.lang.Object

br.net.dd.netherwingcore.common.cryptography.CryptoRandom

public final class CryptoRandom extends Object

Utility class for generating cryptographically secure random bytes.

Method Summary

Modifier and Type

Method

Description

static void

getRandomBytes(byte[] buf)

Fills the provided byte array with random bytes.

static void

getRandomBytes(byte[] buf, int len)

Fills the first len bytes of the provided byte array with random bytes.

static byte[]

getRandomBytes(int size)

Generates a new byte array of the specified size filled with random bytes.

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details
- getRandomBytes
  
  public static void getRandomBytes(byte[] buf)
  
  Fills the provided byte array with random bytes.
  
  Parameters:
  
  buf - the byte array to fill with random bytes
  
  Throws:
  
  NullPointerException - if buf is null
- getRandomBytes
  
  public static void getRandomBytes(byte[] buf, int len)
  
  Fills the first len bytes of the provided byte array with random bytes.
  
  Parameters:
  
  buf - the byte array to fill with random bytes
  
  len - the number of random bytes to generate (must be in range [0, buf.length])
  
  Throws:
  
  NullPointerException - if buf is null
  
  IllegalArgumentException - if len is negative or greater than buf.length
- getRandomBytes
  
  public static byte[] getRandomBytes(int size)
  
  Generates a new byte array of the specified size filled with random bytes.
  
  Parameters:
  
  size - the size of the byte array to generate (must be >= 0)
  
  Returns:
  
  a new byte array filled with random bytes
  
  Throws:
  
  IllegalArgumentException - if size is negative