#include <stdint.h>
-typedef void (*nessie_bc_gen_fpt)(uint8_t* key, uint16_t keysize_b, void* ctx);
+typedef void (*nessie_bc_gen_fpt)(const 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);
+typedef void (*nessie_bc_enc_fpt)(void* buffer, const void* ctx);
+typedef void (*nessie_bc_dec_fpt)(void* buffer, const void* ctx);
typedef struct nessie_bc_ctx_st{
uint16_t keysize_b;