Class SecureRandomSpi

• java.lang.Object
• • java.security.SecureRandomSpi

All Implemented Interfaces:

Serializable

public abstract class SecureRandomSpi
extends Object
implements Serializable

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.

Since:

1.2

See Also:

SecureRandom, Serialized Form

Constructors

SecureRandomSpi

public SecureRandomSpi()

Methods

engineSetSeed

protected abstract void engineSetSeed(byte[] seed)

Reseeds this random object. The given seed supplements, rather than replaces, the existing seed. Thus, repeated calls are guaranteed never to reduce randomness.

Parameters:

seed - the seed.

engineNextBytes

protected abstract void engineNextBytes(byte[] bytes)

Parameters:

bytes - the array to be filled in with random bytes.

engineGenerateSeed

protected abstract byte[] engineGenerateSeed(int numBytes)

Returns the given number of seed bytes. This call may be used to seed other random number generators.

Parameters:

numBytes - the number of seed bytes to generate.

Returns:

the seed bytes.