javax.crypto
Class KeyGeneratorSpi
java.lang.Object
|
+--javax.crypto.KeyGeneratorSpi
- Direct Known Subclasses:
- JCEKeyGenerator
- public abstract class KeyGeneratorSpi
- extends java.lang.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.
- See Also:
SecretKey
Method Summary |
protected abstract SecretKey |
engineGenerateKey()
Generates a secret key. |
protected abstract void |
engineInit(java.security.spec.AlgorithmParameterSpec params,
java.security.SecureRandom random)
Initializes the key generator with the specified parameter
set and a user-provided source of randomness. |
protected abstract void |
engineInit(int keysize,
java.security.SecureRandom random)
Initializes this key generator for a certain keysize, using the given
source of randomness. |
protected abstract void |
engineInit(java.security.SecureRandom random)
Initializes the key generator. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
KeyGeneratorSpi
public KeyGeneratorSpi()
engineInit
protected abstract void engineInit(java.security.SecureRandom random)
- Initializes the key generator.
- Parameters:
random
- the source of randomness for this generator
engineInit
protected abstract void engineInit(java.security.spec.AlgorithmParameterSpec params,
java.security.SecureRandom random)
throws java.security.InvalidAlgorithmParameterException
- Initializes the key generator with the specified parameter
set and a user-provided source of randomness.
- Parameters:
params
- the key generation parametersrandom
- the source of randomness for this key generator- Throws:
java.security.InvalidAlgorithmParameterException
- if params
is
inappropriate for this key generator
engineInit
protected abstract void engineInit(int keysize,
java.security.SecureRandom random)
throws java.security.InvalidParameterException
- 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:
java.security.InvalidParameterException
- if keysize is wrong or not supported.
engineGenerateKey
protected abstract SecretKey engineGenerateKey()
- Generates a secret key.
- Returns:
- the new key.