iaik.security.ec.common

Interface KeyDerivationFunction

All Known Implementing Classes:

HKDF, X963KeyDerivationFunction

public interface KeyDerivationFunction

This interface specifies key derivation functions (KDFs) for use with ECDH.

Author:

Christian Hanser

Method Summary

Modifier and Type	Method and Description
byte[]	engineGenerateKey(byte[] secret) Derives the symmetric key from a shared secret and returns it.
byte[]	engineGenerateKey(byte[] secret, int keyLength) Derives the symmetric key from a shared secret and returns it.
void	engineInit(KDFParameterSpec params) Initializes this KDF.

Method Detail

engineInit

void engineInit(KDFParameterSpec params)

Initializes this KDF.

Parameters:

params - the KDF parameters

engineGenerateKey

byte[] engineGenerateKey(byte[] secret)

Derives the symmetric key from a shared secret and returns it.

Parameters:

secret - the secret, from which the key is going to be derived

Returns:

a byte array holding the derived key

engineGenerateKey

byte[] engineGenerateKey(byte[] secret,
                         int keyLength)

Derives the symmetric key from a shared secret and returns it.

Parameters:

secret - the secret, from which the key is going to be derived

keyLength - the length of the key in bits

Returns:

a byte array holding the derived key