Code Generation

This methods can be used to generate a TOTP (Time-Based One-Time Password) code.

generateCode

Info

After you created the totpGenerator instance you can generate a one-time password by calling the generateCode method with the secret as an argument. Optionally, if you want to specify a specific time and not have the generator to take the current time itself, you can pass a time as an argument.

Usage

val secret = some_base32_encoded_secret_as_bytearray
val code = totpGenerator.generateCode(secret)

With a specific timestamp:

// with millis
totpGenerator.generateCode(secret, 1656459878681)
// with Instant
totpGenerator.generateCode(secret, Instant())
// with Date
totpGenerator.generateCode(secret, Date())

The generated code will be similar to:

> "563111"

Arguments

Argument	Type	Default	Constraint
secret	ByteArray	-	Required
time	Long, Instant, Date	-	Optional