at.favre.lib.armadillo

Interface KeyStretchingFunction

All Known Implementing Classes:

FastKeyStretcher, PBKDF2KeyStretcher

public interface KeyStretchingFunction

In cryptography, key stretching techniques are used to make a possibly weak key, typically a password or passphrase, more secure against a brute-force attack by increasing the time it takes to test each possible key.

This function should implement a key derivation function with a parametrized key stretching feature.

Examples of such algorithms are:

• PKDF2
• Bcrypt
• Scrypt
• Argon2

Since:

18.12.2017

Method Summary

Modifier and Type	Method and Description
byte[]	stretch(byte[] salt, char[] password, int outLengthByte) Derives and stretches the given password with given salt to desired out length.

Method Detail

stretch

byte[] stretch(byte[] salt,
               char[] password,
               int outLengthByte)

Derives and stretches the given password with given salt to desired out length.

Parameters:

salt - to use when deriving/stretching the password

password - to stretch

outLengthByte - required out length byte

Returns:

byte array with length of outLengthByte