Java

Generate TOTP using Base32 Secret (6 Digits, Time-based, 30-second period)

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Generates a 6-digit time-based TOTP code using a base32 secret with a 30-second time period. Chilkat2 Java

import com.chilkatsoft.chilkat2.Crypt2;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.
        //
        Crypt2 crypt = new Crypt2();

        // Base32 secret key:
        String secretKey = "oebf ytfl qmzb p4xd 2ztf zyz4 hjrw 3uyo";

        StringBuilder sbKey = new StringBuilder();
        sbKey.append(secretKey);

        // Remove SPACE chars.
        int numRemoved = sbKey.replace(" ", "");

        // Note: A new token is generated every 30 seconds.  You must generate within the same 30 second interval to get the same result.

        // Generate 6 digits.
        int numDigits = 6;
        // 30 second time period.
        int timePeriod = 30;
        System.out.println("Your token is: " + crypt.totp(sbKey.getAsString(), "base32", "0", "", timePeriod, numDigits, -1, "sha1"));
    }
}