http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.crypto.prng;


Generic interface for objects generating random bytes.

/**
 * Generic interface for objects generating random bytes.
 */
public interface RandomGenerator
{
    
Add more seed material to the generator.

Params:
  • seed – a byte array to be mixed into the generator's state.
/**
     * Add more seed material to the generator.
     *
     * @param seed a byte array to be mixed into the generator's state.
     */
    void addSeedMaterial(byte[] seed);

    
Add more seed material to the generator.

Params:
  • seed – a long value to be mixed into the generator's state.
/**
     * Add more seed material to the generator.
     *
     * @param seed a long value to be mixed into the generator's state.
     */
    void addSeedMaterial(long seed);

    
Fill bytes with random values.

Params:
  • bytes – byte array to be filled.
/**
     * Fill bytes with random values.
     *
     * @param bytes byte array to be filled.
     */
    void nextBytes(byte[] bytes);

    
Fill part of bytes with random values.

Params:
  • bytes – byte array to be filled.
  • start – index to start filling at.
  • len – length of segment to fill.
/**
     * Fill part of bytes with random values.
     *
     * @param bytes byte array to be filled.
     * @param start index to start filling at.
     * @param len length of segment to fill.
     */
    void nextBytes(byte[] bytes, int start, int len);

}