added a minimal nPA card driver for OpenSC

use as something like

    env OPENSC_CONF=$PWD/vsmartcard/npa/opensc.conf opensc-tool --name

npa/src/iso-sm-internal.h

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2014 Frank Morgner
+ *
+ * This file is part of npa.
+ *
+ * npa is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * npa is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * npa.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/**
+ * @file
+ * @defgroup sm Interface to Secure Messaging (SM) defined in ISO 7816
+ * @{
+ */
+#ifndef _CCID_SM_INTERNAL_H
+#define _CCID_SM_INTERNAL_H
+
+#include <libopensc/opensc.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+
+/* @brief Protect an APDU with Secure Messaging
+ *
+ * If secure messaging (SM) is activated in \a sctx and \a apdu is not already
+ * SM protected, \a apdu is processed with the following steps:
+ * \li call to \a sctx->pre_transmit
+ * \li encrypt \a apdu calling \a sctx->encrypt
+ * \li authenticate \a apdu calling \a sctx->authenticate
+ * \li copy the SM protected data to \a sm_apdu
+ *
+ * Data for authentication or encryption is always padded before the callback
+ * functions are called
+ *
+ * @param[in]     card
+ * @param[in]     apdu
+ * @param[in,out] sm_apdu
+ *
+ * @return \c SC_SUCCESS or error code if an error occurred
+ */
+int iso_get_sm_apdu(struct sc_card *card, struct sc_apdu *apdu, struct sc_apdu **sm_apdu);
+
+/* @brief Remove Secure Messaging from an APDU
+ *
+ * If secure messaging (SM) is activated in \a sctx and \a apdu is not already
+ * SM protected, \a apdu is processed with the following steps:
+ * \li verify SM protected \a apdu calling \a sctx->verify_authentication
+ * \li decrypt SM protected \a apdu calling \a sctx->decrypt
+ * \li copy decrypted/authenticated data and status bytes to \a apdu
+ *
+ * Callback functions must not remove padding.
+ *
+ * @param[in]     card
+ * @param[in,out] apdu
+ * @param[in,out] sm_apdu will be freed when done.
+ *
+ * @return \c SC_SUCCESS or error code if an error occurred
+ */
+int iso_free_sm_apdu(struct sc_card *card, struct sc_apdu *apdu, struct sc_apdu **sm_apdu);
+
+/**
+ * @brief Cleans up allocated ressources of the ISO SM driver
+ *
+ * \c iso_sm_close() is designed as SM card operation. However, have in mind
+ * that this card operation is not called automatically for \c
+ * sc_disconnect_card() .
+ *
+ * @param[in] card
+ *
+ * @return \c SC_SUCCESS or error code if an error occurred
+ */
+int iso_sm_close(struct sc_card *card);
+
+#ifdef  __cplusplus
+}
+#endif
+#endif
+/* @} */