SecretKeyFactory (Java SE 11 & JDK 11 )

java.lang.Object
- javax.crypto.SecretKeyFactory

```
public class SecretKeyFactory
extends Object
```
This class represents a factory for secret keys.
Key factories are used to convert keys (opaque cryptographic keys of type Key) into key specifications (transparent representations of the underlying key material), and vice versa. Secret key factories operate only on secret (symmetric) keys.
Key factories are bi-directional, i.e., they allow to build an opaque key object from a given key specification (key material), or to retrieve the underlying key material of a key object in a suitable format.
Application developers should refer to their provider's documentation to find out which key specifications are supported by the generateSecret and getKeySpec methods. 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.
Every implementation of the Java platform is required to support the following standard SecretKeyFactory algorithms:
- DES
- DESede
These algorithms are described in the SecretKeyFactory section of the Java Security Standard Algorithm Names Specification. Consult the release documentation for your implementation to see if any other algorithms are supported.
Since:

1.4

See Also:

SecretKey, DESKeySpec, DESedeKeySpec, PBEKeySpec

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`SecretKeyFactory(SecretKeyFactorySpi keyFacSpi, Provider provider, String algorithm)`	Creates a SecretKeyFactory object.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`SecretKey`	`generateSecret(KeySpec keySpec)`	Generates a `SecretKey` object from the provided key specification (key material).
`String`	`getAlgorithm()`	Returns the algorithm name of this `SecretKeyFactory` object.
`static SecretKeyFactory`	`getInstance(String algorithm)`	Returns a `SecretKeyFactory` object that converts secret keys of the specified algorithm.
`static SecretKeyFactory`	`getInstance(String algorithm, String provider)`	Returns a `SecretKeyFactory` object that converts secret keys of the specified algorithm.
`static SecretKeyFactory`	`getInstance(String algorithm, Provider provider)`	Returns a `SecretKeyFactory` object that converts secret keys of the specified algorithm.
`KeySpec`	`getKeySpec(SecretKey key, Class<?> keySpec)`	Returns a specification (key material) of the given key object in the requested format.
`Provider`	`getProvider()`	Returns the provider of this `SecretKeyFactory` object.
`SecretKey`	`translateKey(SecretKey key)`	Translates a key object, whose provider may be unknown or potentially untrusted, into a corresponding key object of this secret-key factory.

Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll,