+// desfire_key.h
+void Desfire_des_key_new (const uint8_t value[8], desfirekey_t key);
+void Desfire_3des_key_new (const uint8_t value[16], desfirekey_t key);
+void Desfire_des_key_new_with_version (const uint8_t value[8], desfirekey_t key);
+void Desfire_3des_key_new_with_version (const uint8_t value[16], desfirekey_t key);
+void Desfire_3k3des_key_new (const uint8_t value[24], desfirekey_t key);
+void Desfire_3k3des_key_new_with_version (const uint8_t value[24], desfirekey_t key);
+void Desfire_aes_key_new (const uint8_t value[16], desfirekey_t key);
+void Desfire_aes_key_new_with_version (const uint8_t value[16], uint8_t version,desfirekey_t key);
+uint8_t Desfire_key_get_version (desfirekey_t key);
+void Desfire_key_set_version (desfirekey_t key, uint8_t version);
+void Desfire_session_key_new (const uint8_t rnda[], const uint8_t rndb[], desfirekey_t authkey, desfirekey_t key);
+