OsCryptoRandom

java.lang.Object
- org.apache.commons.crypto.random.OsCryptoRandom

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, CryptoRandom
```
final class OsCryptoRandom
extends java.lang.Object
implements CryptoRandom
```
A Random implementation that uses random bytes sourced from the operating system.
This class is not public/protected so does not appear in the main Javadoc Please ensure that property use is documented in the enum CryptoRandomFactory.RandomProvider

Field Summary

Fields
Modifier and Type Field Description

private int pos

private byte[] reservoir

private static int RESERVOIR_LENGTH

private java.io.FileInputStream stream

Constructor Summary

Constructors
Constructor Description

OsCryptoRandom(java.util.Properties props)
Constructs a OsCryptoRandom.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`	Overrides `AutoCloseable.close()`.
`private void`	`fillReservoir(int min)`	Fills the reservoir.
`void`	`nextBytes(byte[] bytes)`	Overrides `CryptoRandom.nextBytes(byte[])`.

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

- Field Detail
  - RESERVOIR_LENGTH
```
private static final int RESERVOIR_LENGTH
```
    See Also:
    
    Constant Field Values
  - stream
```
private transient java.io.FileInputStream stream
```
  - reservoir
```
private final byte[] reservoir
```
  - pos
```
private int pos
```
- Constructor Detail
  - OsCryptoRandom
```
public OsCryptoRandom(java.util.Properties props)
```
    Constructs a OsCryptoRandom.
    
    Parameters:
    
    props - the configuration properties. Uses CryptoRandomFactory.DEVICE_FILE_PATH_KEY to determine the path to the random device, default is CryptoRandomFactory.DEVICE_FILE_PATH_DEFAULT
- Method Detail
  - close
```
public void close()
```
    Overrides AutoCloseable.close(). Closes the OS stream.
    
    Specified by:
    
    close in interface java.lang.AutoCloseable
    
    Specified by:
    
    close in interface java.io.Closeable
  - fillReservoir
```
private void fillReservoir(int min)
```
    Fills the reservoir.
    
    Parameters:
    
    min - the length.
  - nextBytes
```
public void nextBytes(byte[] bytes)
```
    Overrides CryptoRandom.nextBytes(byte[]). Generates random bytes and places them into a user-supplied byte array. The number of random bytes produced is equal to the length of the byte array.
    
    Specified by:
    
    nextBytes in interface CryptoRandom
    
    Parameters:
    
    bytes - the array to be filled in with random bytes.