equip.data
Class Challenge

java.lang.Object
  equip.data.Challenge

public class Challenge

extends java.lang.Object

challenge-response utility class

Field Summary

protected static int	CHALLENGE_SIZE challenge size
protected static java.security.MessageDigest	digest digest algorithm
protected static java.security.SecureRandom	random secure random for challenges
protected static int	SECRET_SIZE secret size

Constructor Summary

Challenge()

Method Summary

static boolean	acceptResponse(java.lang.String secret, java.lang.String challenge, java.lang.String response) check a response
static java.lang.String	bytesToString(byte[] b) bytes to string (hex for now?)
static int	fromHex(char c) char to nibble
static java.lang.String	makeChallenge() make a new challenge
static java.lang.String	makeResponse(java.lang.String secret, java.lang.String challenge) make a response to a challenge
static java.lang.String	makeSecret() make a new secret
static char	toHex(int nibble) nibble to char

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

random

protected static java.security.SecureRandom random

secure random for challenges

CHALLENGE_SIZE

protected static final int CHALLENGE_SIZE

challenge size

See Also:

Constant Field Values

SECRET_SIZE

protected static final int SECRET_SIZE

secret size

See Also:

Constant Field Values

digest

protected static java.security.MessageDigest digest

digest algorithm

Constructor Detail

Challenge

public Challenge()

Method Detail

makeChallenge

public static java.lang.String makeChallenge()

make a new challenge

makeSecret

public static java.lang.String makeSecret()

make a new secret

makeResponse

public static java.lang.String makeResponse(java.lang.String secret,
                                            java.lang.String challenge)

make a response to a challenge

acceptResponse

public static boolean acceptResponse(java.lang.String secret,
                                     java.lang.String challenge,
                                     java.lang.String response)

check a response

bytesToString

public static java.lang.String bytesToString(byte[] b)

bytes to string (hex for now?)

toHex

public static char toHex(int nibble)

nibble to char

fromHex

public static int fromHex(char c)

char to nibble