Package com.storedobject.common

Class TOTP

java.lang.Object

com.storedobject.common.TOTP

public class TOTP
extends Object

TOTP implementation.

Author:

Syam

Constructor Summary

Constructors

Constructor	Description
TOTP(byte[] key)	Constructor.
TOTP(byte[] key, int digits)	Constructor.
TOTP(byte[] key, int digits, String algorithm)	Constructor.

Method Summary

Modifier and Type	Method	Description
static byte[]	generateKey()	Generate a suitable key.
void	setAlgorithm(String algorithm)	Set algorithm.
void	setDigits(int digits)	Set number of digits.
void	setKey(byte[] key)	Set another key.
void	setPeriodDrift(int periodDrift)	Set period-drift.
void	setTimeDrift(int timeDrift)	Set allowed time-drift.
boolean	verify(int code)	Verify the TOTP code.
boolean	verify(String code)	Verify the TOTP code.

Methods inherited from class java.lang.Object

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

Constructor Details

TOTP

public TOTP(byte[] key)

Constructor. Default digits: 6, Default algorithm: SHA1. Default time-drift: 30 seconds. Default period-drift: 1.

Parameters:

key - Key to be used (Must have been generated earlier with generateKey()).

TOTP

public TOTP(byte[] key,
 int digits)

Constructor. Default algorithm: SHA1. Default time-drift: 30 seconds. Default period-drift: 1.

Parameters:

key - Key to be used (Must have been generated earlier with generateKey()).

digits - Number of digits in the TOTP.

TOTP

public TOTP(byte[] key,
 int digits,
 String algorithm)

Constructor. Default time-drift: 30 seconds. Default period-drift: 1.

Parameters:

key - Key to be used (Must have been generated earlier with generateKey()).

digits - Number of digits in the TOTP.

algorithm - Algorithm to use - "SHA1", "SHA256", "SHA512".

Method Details

setKey

public void setKey(byte[] key)

Set another key.

Parameters:

key - Key to be used (Must have been generated earlier with generateKey()).

setDigits

public void setDigits(int digits)

Set number of digits.

Parameters:

digits - Number of digits in the TOTP.

setAlgorithm

public void setAlgorithm(String algorithm)

Set algorithm.

Parameters:

algorithm - Algorithm to use - "SHA1", "SHA256", "SHA512".

setTimeDrift

public void setTimeDrift(int timeDrift)

Set allowed time-drift. Default is 30 seconds.

Parameters:

timeDrift - Time-drift to set.

setPeriodDrift

public void setPeriodDrift(int periodDrift)

Set period-drift. Default is 1 period.

Parameters:

periodDrift - Period-drift to set.

verify

public boolean verify(String code)

Verify the TOTP code.

Parameters:

code - Code to verify.

Returns:

True/false.

verify

public boolean verify(int code)

Verify the TOTP code.

Parameters:

code - Code to verify.

Returns:

True/false.

generateKey

public static byte[] generateKey()

Generate a suitable key.

Returns:

Generated key.