KeyDerivation.Lazy (lazysodium-java 5.1.4 API)

All Known Implementing Classes:

LazySodium, LazySodiumJava

Enclosing interface:

KeyDerivation
```
public static interface KeyDerivation.Lazy
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Key`	`cryptoKdfDeriveFromKey(int lengthOfSubKey, long subKeyId, java.lang.String context, Key masterKey)`	Derive a subkey from a master key.
`Key`	`cryptoKdfKeygen()`	Auto generates a master key and returns it in string format.

- Method Detail
  - cryptoKdfKeygen
```
Key cryptoKdfKeygen()
```
    Auto generates a master key and returns it in string format. The reason why this does not return a string via the normal 'masterKey.getBytes()' is because the resulting string is mangled.
    
    Returns:
    
    A master Key.
  - cryptoKdfDeriveFromKey
```
Key cryptoKdfDeriveFromKey(int lengthOfSubKey,
                           long subKeyId,
                           java.lang.String context,
                           Key masterKey)
                    throws SodiumException
```
    Derive a subkey from a master key.
    
    Parameters:
    
    lengthOfSubKey - The length of the subkey. Should be from KeyDerivation.BYTES_MIN to KeyDerivation.BYTES_MAX.
    
    subKeyId - The ID of the subkey.
    
    context - The context of the subkey. Must be KeyDerivation.CONTEXT_BYTES.
    
    masterKey - The generated master key from cryptoKdfKeygen().
    
    Returns:
    
    A subkey that's gone through Helpers.Lazy.sodiumBin2Hex(byte[]).
    
    Throws:
    
    SodiumException - If any of the lengths were not correct.