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diff --git a/libcacard/vcard_emul.h b/libcacard/vcard_emul.h
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+++ b/libcacard/vcard_emul.h
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+/*
+ * This is the actual card emulator.
+ *
+ * These functions can be implemented in different ways on different platforms
+ * using the underlying system primitives. For Linux it uses NSS, though direct
+ * to PKCS #11, openssl+pkcs11, or even gnu crypto libraries+pkcs #11 could be
+ * used. On Windows CAPI could be used.
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ */
+
+#ifndef VCARD_EMUL_H
+#define VCARD_EMUL_H 1
+
+#include "card_7816t.h"
+#include "vcard.h"
+#include "vcard_emul_type.h"
+
+/*
+ * types
+ */
+typedef enum {
+    VCARD_EMUL_OK = 0,
+    VCARD_EMUL_FAIL,
+    /* return values by vcard_emul_init */
+    VCARD_EMUL_INIT_ALREADY_INITED,
+} VCardEmulError;
+
+/* options are emul specific. call card_emul_parse_args to change a string
+ * To an options struct */
+typedef struct VCardEmulOptionsStruct VCardEmulOptions;
+
+/*
+ * Login functions
+ */
+/* return the number of login attempts still possible on the card. if unknown,
+ * return -1 */
+int vcard_emul_get_login_count(VCard *card);
+/* login into the card, return the 7816 status word (sw2 || sw1) */
+vcard_7816_status_t vcard_emul_login(VCard *card, unsigned char *pin,
+                                     int pin_len);
+
+/*
+ * key functions
+ */
+/* delete a key */
+void vcard_emul_delete_key(VCardKey *key);
+/* RSA sign/decrypt with the key, signature happens 'in place' */
+vcard_7816_status_t vcard_emul_rsa_op(VCard *card, VCardKey *key,
+                                  unsigned char *buffer, int buffer_size);
+
+void vcard_emul_reset(VCard *card, VCardPower power);
+void vcard_emul_get_atr(VCard *card, unsigned char *atr, int *atr_len);
+
+/* Re-insert of a card that has been removed by force removal */
+VCardEmulError vcard_emul_force_card_insert(VReader *vreader);
+/* Force a card removal even if the card is not physically removed */
+VCardEmulError vcard_emul_force_card_remove(VReader *vreader);
+
+VCardEmulOptions *vcard_emul_options(const char *args);
+VCardEmulError vcard_emul_init(const VCardEmulOptions *options);
+void vcard_emul_replay_insertion_events(void);
+void vcard_emul_usage(void);
+#endif