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Increase thread safety.

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randombytes() doesn't seem to have any real speed disadvantage.

Also makes people who think nonces need to be random happy.
This commit is contained in:
irungentoo 2015-03-29 13:14:13 -04:00
parent 212bbf2129
commit abff19fdcc
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GPG Key ID: 10349DC9BED89E98
1 changed files with 1 additions and 10 deletions
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11
toxcore/crypto_core.c
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@ -194,19 +194,10 @@ void new_symmetric_key(uint8_t *key)
randombytes(key, crypto_box_KEYBYTES); randombytes(key, crypto_box_KEYBYTES);
} }
static uint8_t base_nonce[crypto_box_NONCEBYTES];
static uint8_t nonce_set = 0;
/* Gives a nonce guaranteed to be different from previous ones.*/ /* Gives a nonce guaranteed to be different from previous ones.*/
void new_nonce(uint8_t *nonce) void new_nonce(uint8_t *nonce)
{ {
if (nonce_set == 0) { random_nonce(nonce);
random_nonce(base_nonce);
nonce_set = 1;
}
increment_nonce(base_nonce);
memcpy(nonce, base_nonce, crypto_box_NONCEBYTES);
} }
/* Create a request to peer. /* Create a request to peer.