C++

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. C++

#include <CkCrypt2.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.
    //  
    CkCrypt2 crypt;

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

    CkStringBuilder sbKey;
    success = 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;
    std::cout << "Your token is: " << crypt.totp(sbKey.getAsString(),"base32","0","",timePeriod,numDigits,-1,"sha1") << "\r\n";
    }