Exemplo n.º 1
0
func (ps *Key) getPrivateKey(module *pkcs11.Ctx, session pkcs11.SessionHandle, label string) (pkcs11.ObjectHandle, error) {
	var noHandle pkcs11.ObjectHandle
	template := []*pkcs11.Attribute{
		pkcs11.NewAttribute(pkcs11.CKA_CLASS, pkcs11.CKO_PRIVATE_KEY),
		pkcs11.NewAttribute(pkcs11.CKA_LABEL, label),
	}
	if err := module.FindObjectsInit(session, template); err != nil {
		return noHandle, err
	}
	objs, _, err := module.FindObjects(session, 2)
	if err != nil {
		return noHandle, err
	}
	if err = module.FindObjectsFinal(session); err != nil {
		return noHandle, err
	}

	if len(objs) == 0 {
		return noHandle, fmt.Errorf("private key not found")
	}
	privateKeyHandle := objs[0]

	// Check whether the key has the CKA_ALWAYS_AUTHENTICATE attribute.
	// If so, fail: we don't want to have to re-authenticate for each sign
	// operation.
	attributes, err := module.GetAttributeValue(session, privateKeyHandle, []*pkcs11.Attribute{
		pkcs11.NewAttribute(pkcs11.CKA_ALWAYS_AUTHENTICATE, false),
	})
	if err != nil {
		return noHandle, err
	}
	for _, attribute := range attributes {
		if len(attribute.Value) > 0 && attribute.Value[0] == 1 {
			ps.alwaysAuthenticate = true
		}
	}

	return privateKeyHandle, nil
}
Exemplo n.º 2
0
func getPrivateKey(context *pkcs11.Ctx, session pkcs11.SessionHandle, label string) (pkcs11.ObjectHandle, error) {
	var noKey pkcs11.ObjectHandle
	template := []*pkcs11.Attribute{
		pkcs11.NewAttribute(pkcs11.CKA_CLASS, pkcs11.CKO_PRIVATE_KEY),
		pkcs11.NewAttribute(pkcs11.CKA_LABEL, label),
	}
	if err := context.FindObjectsInit(session, template); err != nil {
		return noKey, err
	}
	objs, _, err := context.FindObjects(session, 2)
	if err != nil {
		return noKey, err
	}
	if err = context.FindObjectsFinal(session); err != nil {
		return noKey, err
	}

	if len(objs) == 0 {
		err = fmt.Errorf("private key not found")
		return noKey, err
	}
	return objs[0], nil
}