+// desfire_crypto.h
+void *mifare_cryto_preprocess_data (desfiretag_t tag, void *data, size_t *nbytes, off_t offset, int communication_settings);
+void *mifare_cryto_postprocess_data (desfiretag_t tag, void *data, ssize_t *nbytes, int communication_settings);
+void mifare_cypher_single_block (desfirekey_t key, uint8_t *data, uint8_t *ivect, MifareCryptoDirection direction, MifareCryptoOperation operation, size_t block_size);
+void mifare_cypher_blocks_chained (desfiretag_t tag, desfirekey_t key, uint8_t *ivect, uint8_t *data, size_t data_size, MifareCryptoDirection direction, MifareCryptoOperation operation);
+size_t key_block_size (const desfirekey_t key);
+size_t padded_data_length (const size_t nbytes, const size_t block_size);
+size_t maced_data_length (const desfirekey_t key, const size_t nbytes);
+size_t enciphered_data_length (const desfiretag_t tag, const size_t nbytes, int communication_settings);
+void cmac_generate_subkeys (desfirekey_t key);
+void cmac (const desfirekey_t key, uint8_t *ivect, const uint8_t *data, size_t len, uint8_t *cmac);