yubikey attestation client

main.go

package main

import (
	"encoding/base64"
	"fmt"
	"log"
	"strings"

	"github.com/go-piv/piv-go/piv"
)

func main() {
	cards, err := piv.Cards()
	if err != nil {
		log.Fatalf("cannot find smart cards, err:%+v", err)
	}
	var yk *piv.YubiKey
	var ykFound bool
	for _, card := range cards {
		if strings.Contains(strings.ToLower(card), "yubikey") {
			if yk, err = piv.Open(card); err != nil {
				log.Fatalf("cannot open yubikey, err: %+v", err)
			}
			ykFound = true
			break
		}
	}
	if ykFound {
		slotAttestationCertificate, err := yk.Attest(piv.SlotAuthentication)
		if err != nil {
			log.Fatalf("cannot attest, err: %+v", err)
		}
		fmt.Println(base64.StdEncoding.EncodeToString(slotAttestationCertificate.Raw))
	} else {
		log.Fatal("could find yubikey device")
	}
}