-void cast5_init(const void* key, uint8_t keylength_b, cast5_ctx_t* s){
+void cast5_init(const void* key, uint16_t keylength_b, cast5_ctx_t* s){
/* we migth return if the key is valid and if setup was sucessfull */
uint32_t x[4], z[4];
#define BPX ((uint8_t*)&(x[0]))