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Summary: Ctors | Protected Methods | Inherited Methods

SecureRandomSpi

public abstract class SecureRandomSpi
extends Object implements Serializable

java.lang.Object
↳	java.security.SecureRandomSpi

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.

See also:

SecureRandom

Summary

Public constructors
`SecureRandomSpi()`

Protected methods
`abstract byte[]`	`engineGenerateSeed(int numBytes)` Returns the given number of seed bytes.
`abstract void`	`engineNextBytes(byte[] bytes)` Generates a user-specified number of random bytes.
`abstract void`	`engineSetSeed(byte[] seed)` Reseeds this random object.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public constructors

SecureRandomSpi

public SecureRandomSpi ()

Protected methods

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`	`int`: the number of seed bytes to generate.

Returns
`byte[]`	the seed bytes.

engineNextBytes

protected abstract void engineNextBytes (byte[] bytes)

Generates a user-specified number of random bytes.

If a call to engineSetSeed had not occurred previously, the first call to this method forces this SecureRandom implementation to seed itself. This self-seeding will not occur if engineSetSeed was previously called.

Parameters
`bytes`	`byte`: the array to be filled in with random bytes.

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`	`byte`: the seed.

Interfaces

Classes

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Exceptions

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Results for

SecureRandomSpi

Summary

Public constructors

Protected methods

Inherited methods

Public constructors

SecureRandomSpi

Protected methods

engineGenerateSeed

engineNextBytes

engineSetSeed