-typedef void (*nessie_gen_fpt)(uint8_t*, uint16_t, void*);
-typedef void (*nessie_enc_fpt)(void*, void*);
-typedef void (*nessie_dec_fpt)(void*, void*);
+typedef void (*nessie_bc_gen_fpt)(uint8_t* key, uint16_t keysize_b, void* ctx);
+typedef void (*nessie_bc_free_fpt)(void* ctx);
+typedef void (*nessie_bc_enc_fpt)(void* buffer, void* ctx);
+typedef void (*nessie_bc_dec_fpt)(void* buffer, void* ctx);