Java™ Platform
Standard Ed. 6

javax.crypto
Class KeyGeneratorSpi

java.lang.Object
  extended by javax.crypto.KeyGeneratorSpi

public abstract class KeyGeneratorSpi
extends Object

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.

Since:
1.4
See Also:
SecretKey

Constructor Summary
KeyGeneratorSpi()
           
 
Method Summary
protected abstract  SecretKey engineGenerateKey()
          Generates a secret key.
protected abstract  void engineInit(AlgorithmParameterSpec params, SecureRandom random)
          Initializes the key generator with the specified parameter set and a user-provided source of randomness.
protected abstract  void engineInit(int keysize, SecureRandom random)
          Initializes this key generator for a certain keysize, using the given source of randomness.
protected abstract  void engineInit(SecureRandom random)
          Initializes the key generator.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

KeyGeneratorSpi

public KeyGeneratorSpi()
Method Detail

engineInit

protected abstract void engineInit(SecureRandom random)
Initializes the key generator.

Parameters:
random - the source of randomness for this generator

engineInit

protected abstract void engineInit(AlgorithmParameterSpec params,
                                   SecureRandom random)
                            throws InvalidAlgorithmParameterException
Initializes the key generator with the specified parameter set and a user-provided source of randomness.

Parameters:
params - the key generation parameters
random - the source of randomness for this key generator
Throws:
InvalidAlgorithmParameterException - if params is inappropriate for this key generator

engineInit

protected abstract void engineInit(int keysize,
                                   SecureRandom random)
Initializes this key generator for a certain keysize, using the given source of randomness.

Parameters:
keysize - the keysize. This is an algorithm-specific metric, specified in number of bits.
random - the source of randomness for this key generator
Throws:
InvalidParameterException - if the keysize is wrong or not supported.

engineGenerateKey

protected abstract SecretKey engineGenerateKey()
Generates a secret key.

Returns:
the new key

Java™ Platform
Standard Ed. 6

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