java.lang.Object
- io.github.mmm.crypto.symmetric.key.spec.SymmetricKeySpecFactoryImplPbe

All Implemented Interfaces:

SymmetricKeySpecFactory
```
public class SymmetricKeySpecFactoryImplPbe
extends Object
implements SymmetricKeySpecFactory
```
Implementation of SymmetricKeySpecFactory for PBE (PBEKeySpec). For sufficient security strength you should use a salt of 20 bytes, a key length of 256 bits (never use less than 128 bits) and a high number of iterations (e.g. 65536).

Since:

1.0.0

Author:

Joerg Hohwiller (hohwille at users.sourceforge.net)

Constructor Summary

Constructors
Constructor	Description
`SymmetricKeySpecFactoryImplPbe()`	The constructor.
`SymmetricKeySpecFactoryImplPbe(byte[] salt)`	The constructor.
`SymmetricKeySpecFactoryImplPbe(byte[] salt, int iterationCount)`	The constructor.
`SymmetricKeySpecFactoryImplPbe(byte[] salt, int iterationCount, int keyLength)`	The constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

KeySpec createKeySpec(String password)

int getIterationCount()

int getKeyLength()
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SymmetricKeySpecFactoryImplPbe
```
public SymmetricKeySpecFactoryImplPbe()
```
    The constructor.
  - SymmetricKeySpecFactoryImplPbe
```
public SymmetricKeySpecFactoryImplPbe(byte[] salt)
```
    The constructor.
    
    Parameters:
    
    salt - the salt or null for no salting.
  - SymmetricKeySpecFactoryImplPbe
```
public SymmetricKeySpecFactoryImplPbe(byte[] salt,
                                      int iterationCount)
```
    The constructor.
    
    Parameters:
    
    salt - the salt or null for no salting.
    
    iterationCount - the iteration count.
  - SymmetricKeySpecFactoryImplPbe
```
public SymmetricKeySpecFactoryImplPbe(byte[] salt,
                                      int iterationCount,
                                      int keyLength)
```
    The constructor.
    
    Parameters:
    
    salt - the salt or null for no salting.
    
    iterationCount - the iteration count.
    
    keyLength - the key length.
- Method Detail
  - createKeySpec
```
public KeySpec createKeySpec(String password)
```
    Specified by:
    
    createKeySpec in interface SymmetricKeySpecFactory
    
    Parameters:
    
    password - the secret password.
    
    Returns:
    
    the KeySpec for the given password. May contain additional information like salt.
  - getIterationCount
```
public int getIterationCount()
```
    Returns:
    
    the iteration count or 0 for no iterations.
  - getKeyLength
```
public int getKeyLength()
```
    Returns:
    
    the key length in bits or 0 if unspecified (to use defaults).

Modifier and Type	Method	Description
`KeySpec`	`createKeySpec(String password)`
`int`	`getIterationCount()`
`int`	`getKeyLength()`

Class SymmetricKeySpecFactoryImplPbe

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

SymmetricKeySpecFactoryImplPbe

SymmetricKeySpecFactoryImplPbe

SymmetricKeySpecFactoryImplPbe

SymmetricKeySpecFactoryImplPbe

Method Detail

createKeySpec

getIterationCount

getKeyLength