Java-based Time-based One Time Password (TOTP) generator

Installation

The compiled libraries are deployed to Maven Central.

With maven:

<dependency>
    <groupId>io.github.kamilszewc</groupId>
    <artifactId>totp</artifactId>
    <version>6.0</version>
</dependency>

With gradle:

implementation 'io.github.kamilszewc:totp:6.0'

It requires Java 8.

Basic usage

Getting totp code (defult settings):

String code = Totp.getCode(secret);

Getting the ramaining validity time of totp code (default settings):

long remainingValidityTime = Totp.getRemainingValidityTime();

There is also an option to generate custom codes:

String code = Totp.getCode(
                    secret,         // Secret password
                    epoch,          // Epoch (default 0)
                    timeStep,       // Length of password validity in seconds (default 30)
                    timeStamp,      // Time stamp (Unix time) (default now)
                    codeLength,     // Length of returned code (between 1 and 9, default 6)
                    hashFunction);  // Hash function (default sha1)