com.goterl.lazysodium.interfaces

Interface KeyDerivation.Lazy

All Known Implementing Classes:

LazySodium, LazySodiumJava

Enclosing interface:

KeyDerivation

public static interface KeyDerivation.Lazy

Method Summary

Modifier and Type	Method and 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.