KeyGeneratorSpi

public abstract class KeyGeneratorSpi
extends Object

java.lang.Object
↳	javax.crypto.KeyGeneratorSpi

This class defines the Service Provider Interface (SPI) for the KeyGenerator class. All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a key generator for a particular algorithm.

See also:

SecretKey

Summary

Public constructors
`KeyGeneratorSpi()`

Protected methods
`abstract SecretKey`	`engineGenerateKey()` Generates a secret key.
`abstract void`	`engineInit(AlgorithmParameterSpec params, SecureRandom random)` Initializes the key generator with the specified parameter set and a user-provided source of randomness.
`abstract void`	`engineInit(SecureRandom random)` Initializes the key generator.
`abstract void`	`engineInit(int keysize, SecureRandom random)` Initializes this key generator for a certain keysize, using the given source of randomness.

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 timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

KeyGeneratorSpi

Added in API level 1

public KeyGeneratorSpi ()

Protected methods

engineGenerateKey

Added in API level 1

protected abstract SecretKey engineGenerateKey ()

Generates a secret key.

Returns
`SecretKey`	the new key

engineInit

Added in API level 1

protected abstract void engineInit (AlgorithmParameterSpec params, 
                SecureRandom random)

Initializes the key generator with the specified parameter set and a user-provided source of randomness.

Parameters
`params`	`AlgorithmParameterSpec`: the key generation parameters
`random`	`SecureRandom`: the source of randomness for this key generator

Throws
`InvalidAlgorithmParameterException`	if `params` is inappropriate for this key generator

engineInit

Added in API level 1

protected abstract void engineInit (SecureRandom random)

Initializes the key generator.

Parameters
`random`	`SecureRandom`: the source of randomness for this generator

engineInit

Added in API level 1

protected abstract void engineInit (int keysize, 
                SecureRandom random)

Initializes this key generator for a certain keysize, using the given source of randomness.

Parameters
`keysize`	`int`: the keysize. This is an algorithm-specific metric, specified in number of bits.
`random`	`SecureRandom`: the source of randomness for this key generator

Throws
`InvalidParameterException`	if the keysize is wrong or not supported.