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#

bool success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// 
Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

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

Chilkat.StringBuilder sbKey = new Chilkat.StringBuilder();
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;
Debug.WriteLine("Your token is: " + crypt.Totp(sbKey.GetAsString(),"base32","0","",timePeriod,numDigits,-1,"sha1"));