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• RandomGenerator.java

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com.fitbur.bouncycastle.crypto.prng.RandomGenerator Maven / Gradle / Ivy

package com.fitbur.bouncycastle.crypto.prng;

/**
 * Generic interface for objects generating random bytes.
 */
public interface RandomGenerator
{
    /**
     * 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.
     *
     * @param seed a long value to be mixed into the generator's state.
     */
    void addSeedMaterial(long seed);

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

    /**
     * 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);

}