SecretKeyFactorySpi (crypto 2.0.1 API)

java.lang.Object
- javax.crypto.SecretKeyFactorySpi

```
public abstract class SecretKeyFactorySpi
extends java.lang.Object
```
This class defines the Service Provider Interface (SPI) for the SecretKeyFactory class. All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a secret-key factory for a particular algorithm.
A provider should document all the key specifications supported by its secret key factory. For example, the DES secret-key factory supplied by the "SunJCE" provider supports DESKeySpec as a transparent representation of DES keys, and that provider's secret-key factory for Triple DES keys supports DESedeKeySpec as a transparent representation of Triple DES keys.

Since:

1.4

See Also:

SecretKey, DESKeySpec, DESedeKeySpec

Constructor Summary

Constructors
Constructor Description

SecretKeyFactorySpi()

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`protected abstract SecretKey`	`engineGenerateSecret(KeySpec keySpec)`	Generates a `SecretKey` object from the provided key specification (key material).

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SecretKeyFactorySpi
```
public SecretKeyFactorySpi()
```
- Method Detail
  - engineGenerateSecret
```
protected abstract SecretKey engineGenerateSecret(KeySpec keySpec)
                                           throws InvalidKeySpecException
```
    Generates a SecretKey object from the provided key specification (key material).
    
    Parameters:
    
    keySpec - the specification (key material) of the secret key
    
    Returns:
    
    the secret key
    
    Throws:
    
    InvalidKeySpecException - if the given key specification is inappropriate for this secret-key factory to produce a secret key.