kmac

// Using CryptoRand from KotlinCrypto/random repo as an example
import org.kotlincrypto.random.CryptoRand
// ...

fun main() {
    val key = CryptoRand.Default.nextBytes(ByteArray(100))

    // NIST.SP.800-185 derived functions
    val S = "My Customization".encodeToByteArray()

    // Macs
    KMAC128(key)
    // Return 123 bytes instead of the default
    // whenever doFinal() is called.
    KMAC256(key, S, outputLength = 123)
}

fun main() {
    // NIST.SP.800-185 derived functions
    val S = "My Customization".encodeToByteArray()

    val xof: Xof<KMAC128> = KMAC128.xOf(key, S)
    KMAC256.xOf(key)
}