(Swift 3,4,5...) Generate TOTP using Base32 Secret (6 Digits, Time-based, 30-second period)

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

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.
    // 
    let crypt = CkoCrypt2()!

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

    let sbKey = CkoStringBuilder()!
    var success: Bool = sbKey.append(secretKey)

    // Remove SPACE chars.
    var numRemoved: Int = sbKey.replace(" ", replacement: "").intValue

    // 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.
    var numDigits: Int = 6
    // 30 second time period.
    var timePeriod: Int = 30
    print("Your token is: \(crypt.totp(sbKey.getAsString(), secretEnc: "base32", t0: "0", tNow: "", tStep: timePeriod, numDigits: numDigits, truncOffset: -1, hashAlg: "sha1")!)")

}