diff options
Diffstat (limited to 'src/cc20rng/cc20_prng.h')
| -rw-r--r-- | src/cc20rng/cc20_prng.h | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/src/cc20rng/cc20_prng.h b/src/cc20rng/cc20_prng.h index 6940f53..08f78d7 100644 --- a/src/cc20rng/cc20_prng.h +++ b/src/cc20rng/cc20_prng.h @@ -3,16 +3,22 @@ #include <stdint.h> -#define CHACHA20_MAX_BLOCK_COUNTER 0xffffffff -#define CHACHA20_NUM_WORDS 16 -#define CHACHA20_BLOCK_SIZE (CHACHA20_NUM_WORDS * 4) +#define CHACHA20_BLOCK_SIZE_WORDS 16 +#define CHACHA20_BLOCK_SIZE (CHACHA20_BLOCK_SIZE_WORDS * 4) struct cc20_state { - uint32_t i[CHACHA20_NUM_WORDS]; + union { + struct { + uint32_t constant[4]; + uint32_t key[8]; + uint32_t counter; + uint32_t nonce[3]; + } s; + uint32_t i[CHACHA20_BLOCK_SIZE_WORDS]; + }; }; -extern void chacha20_prng_reseed(struct cc20_state *cc, uint32_t *entropy); -extern void chacha20_prng_block(struct cc20_state *cc, uint32_t block_counter, struct cc20_state *out); -extern int chacha20_prng_self_test(); +void chacha20_prng_block(struct cc20_state *cc, uint8_t *out); +int chacha20_prng_self_test(); #endif /* __STM32_CHACHA20_H */ |