4 #define STREAM_BYTES 16
7 enum GRAIN_ROUND {INIT, FP1, NORMAL};
16 // TODO: add struct with output: keystream and optionally macstream and tag
18 uint8_t keystream[STREAM_BYTES];
19 uint8_t macstream[STREAM_BYTES];
23 void init_grain(grain_state *grain, uint8_t *key, uint8_t *iv);
24 uint8_t next_lfsr_fb(grain_state *grain);
25 uint8_t next_nfsr_fb(grain_state *grain);
26 uint8_t next_h(grain_state *grain);
27 uint8_t shift(uint8_t fsr[128], uint8_t fb);
28 void auth_shift(uint8_t sr[32], uint8_t fb);
29 uint8_t next_z(grain_state *grain, uint8_t);
30 void generate_keystream(grain_state *grain, grain_data *data, uint8_t *);
31 void print_state(grain_state *grain);