java.security.SecureRandomSpi Maven / Gradle / Ivy
/*
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This work corresponds to the API signatures of JSR 219: Foundation
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*/
package java.security;
/**
* This class defines the Service Provider Interface (SPI)
* for the SecureRandom class.
* All the abstract methods in this class must be implemented by each
* service provider who wishes to supply the implementation
* of a cryptographically strong pseudo-random number generator.
*
* @version 1.7, 02/02/00
*
* @see SecureRandom
* @since 1.2
*/
public abstract class SecureRandomSpi implements java.io.Serializable
{
public SecureRandomSpi() { }
/**
* Reseeds this random object. The given seed supplements, rather than
* replaces, the existing seed. Thus, repeated calls are guaranteed
* never to reduce randomness.
*
* @param seed the seed.
*/
protected abstract void engineSetSeed(byte[] seed);
/**
* Generates a user-specified number of random bytes.
*
* @param bytes the array to be filled in with random bytes.
*/
protected abstract void engineNextBytes(byte[] bytes);
/**
* Returns the given number of seed bytes. This call may be used to
* seed other random number generators.
*
* @param numBytes the number of seed bytes to generate.
*
* @return the seed bytes.
*/
protected abstract byte[] engineGenerateSeed(int numBytes);
}