io.vertx.ext.auth

## Class PRNG

- java.lang.Object
- - io.vertx.ext.auth.PRNG

- All Implemented Interfaces:
    VertxContextPRNG

      public class PRNG
      extends Object
      implements VertxContextPRNG

  Wrapper around secure random that periodically seeds the PRNG with new entropy. To avoid entropy exhaustion the entropy is only refreshed if the PRNG is used. This introduces a new variable which reduces the probability of cracking the random number generator.
  Author:
    Paulo Lopes

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `PRNG(Vertx vertx)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `close()`
    `void` | `nextBytes(byte[] bytes)` Fills the given byte array with random bytes.
    `int` | `nextInt()` Returns a secure random int
    `int` | `nextInt(int bound)` Returns a secure random int, between 0 (inclusive) and the specified bound (exclusive).

    - ### Methods inherited from class java.lang.Object

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

    - ### Methods inherited from interface io.vertx.ext.auth.VertxContextPRNG

      `current, current, current, nextString`

- - ### Constructor Detail

    - #### PRNG

          public PRNG(Vertx vertx)

  - ### Method Detail

    - #### close

          public void close()

    - #### nextBytes

          public void nextBytes(byte[] bytes)

      Description copied from interface: `VertxContextPRNG`
      Fills the given byte array with random bytes.
      Specified by:
        `nextBytes` in interface `VertxContextPRNG`
      Parameters:
        `bytes` - a byte array.

    - #### nextInt

          public int nextInt()

      Description copied from interface: `VertxContextPRNG`
      Returns a secure random int
      Specified by:
        `nextInt` in interface `VertxContextPRNG`
      Returns:
        random int.

    - #### nextInt

          public int nextInt(int bound)

      Description copied from interface: `VertxContextPRNG`
      Returns a secure random int, between 0 (inclusive) and the specified bound (exclusive).
      Specified by:
        `nextInt` in interface `VertxContextPRNG`
      Parameters:
        `bound` - the upper bound (exclusive), which must be positive.
      Returns:
        random int.

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