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drop 128-bit keys from ChaCha implementation

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Daniel Micay 2018-09-11 10:22:28 -04:00
parent b52d9ca831
commit 433af6d4ba
3 changed files with 16 additions and 25 deletions
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9
random.c
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@ -35,14 +35,11 @@ static void get_random_seed(void *buf, size_t size) {
}
}
#define KEY_SIZE 32
#define IV_SIZE 8
void random_state_init(struct random_state *state) {
uint8_t rnd[KEY_SIZE + IV_SIZE];
uint8_t rnd[CHACHA_KEY_SIZE + CHACHA_IV_SIZE];
get_random_seed(rnd, sizeof(rnd));
chacha_keysetup(&state->ctx, rnd, KEY_SIZE * 8);
chacha_ivsetup(&state->ctx, rnd + KEY_SIZE);
chacha_keysetup(&state->ctx, rnd);
chacha_ivsetup(&state->ctx, rnd + CHACHA_KEY_SIZE);
chacha_keystream_bytes(&state->ctx, state->cache, RANDOM_CACHE_SIZE);
state->index = 0;
state->reseed = 0;