TimeBasedOTP (Keycloak Docs Distribution 21.0.2 API)

java.lang.Object
- org.keycloak.models.utils.HmacOTP
- - org.keycloak.models.utils.TimeBasedOTP

```
public class TimeBasedOTP
extends HmacOTP
```
TOTP: Time-based One-time Password Algorithm Based on http://tools.ietf.org/html/draft-mraihi-totp-timebased-06

Since:

Sep 20, 2010

Author:

anil saldhana

Field Summary

Fields
Modifier and Type Field Description

static int DEFAULT_DELAY_WINDOW

static int DEFAULT_INTERVAL_SECONDS
- Fields inherited from class org.keycloak.models.utils.HmacOTP
  algorithm, DEFAULT_ALGORITHM, DEFAULT_NUMBER_DIGITS, HMAC_SHA1, HMAC_SHA256, HMAC_SHA512, lookAheadWindow, numberDigits

Constructor Summary

Constructors
Constructor	Description
`TimeBasedOTP()`
`TimeBasedOTP(String algorithm, int numberDigits, int timeIntervalInSeconds, int lookAroundWindow)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`generateTOTP(String secretKey)`	Generates a token.
`void`	`setCalendar(Calendar calendar)`
`boolean`	`validateTOTP(String token, byte[] secret)`	Validates a token using a secret key.

Methods inherited from class org.keycloak.models.utils.HmacOTP
generateHOTP, generateOTP, generateSecret, validateHOTP

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DEFAULT_INTERVAL_SECONDS
```
public static final int DEFAULT_INTERVAL_SECONDS
```
    See Also:
    
    Constant Field Values
  - DEFAULT_DELAY_WINDOW
```
public static final int DEFAULT_DELAY_WINDOW
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - TimeBasedOTP
```
public TimeBasedOTP()
```
  - TimeBasedOTP
```
public TimeBasedOTP(String algorithm,
                    int numberDigits,
                    int timeIntervalInSeconds,
                    int lookAroundWindow)
```
    Parameters:
    
    algorithm - the encryption algorithm
    
    numberDigits - the number of digits for tokens
    
    timeIntervalInSeconds - the number of seconds a token is valid
    
    lookAroundWindow - the number of previous and following intervals that should be used to validate tokens.
- Method Detail
  - generateTOTP
```
public String generateTOTP(String secretKey)
```
    Generates a token.
    
    Parameters:
    
    secretKey - the secret key to derive the token from.
  - validateTOTP
```
public boolean validateTOTP(String token,
                            byte[] secret)
```
    Validates a token using a secret key.
    
    Parameters:
    
    token - OTP string to validate
    
    secret - Shared secret
    
    Returns:
    
    true of the token is valid
  - setCalendar
```
public void setCalendar(Calendar calendar)
```