gopiv

A NIST 800-73-4 standards compliant PIV library written in Go, with support for additional card management functionality offered by various manufacturers' proprietary extensions to the PIV protocol. Work in progress.

Use

Uses the scard go library to interact with the underlying smartcard.

ctx, err := scard.EstablishContext()
if err != nil {
	log.Fatalln(err)
}

readers, err := ctx.ListReaders()
if err != nil {
	log.Fatalln(err)
}

if len(readers) == 0 {
	log.Fatalln("No connected smartcard readers")
}

card, err := ctx.Connect(readers[0], scard.ShareShared, scard.ProtocolAny)
if err != nil {
	log.Fatalln(err) // No smartcard inserted in reader
}

defer card.Disconnect(scard.ResetCard)

pivCard, err := gopiv.GetPivCard(card)
if err != nil {
	log.Fatalln(err) // Connected smartcard supports PIV
}

cert, err := pivCard.GetCertificate(gopiv.AuthenticationSlot)
if err != nil {
	log.Fatalln(err)
}

log.Println(cert.Subject.CommonName)

if yubikey, ok := pivCard.(*gopiv.Yubikey); ok {
	// Connected smartcard supports Yubico's PIV extensions

	attestation, err := yubikey.Attest(gopiv.AuthenticationKey)
	if err != nil {
		log.Fatalln(err)
	}

	log.Println(cert.Subject.CommonName)
}