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Update so this works with the new distance function.

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irungentoo 2015-12-12 14:49:21 -05:00
parent 1c8109e524
commit 07a6f482d9
No known key found for this signature in database
GPG Key ID: 10349DC9BED89E98
1 changed files with 15 additions and 6 deletions
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21
toxcore/DHT.c
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@ -1335,22 +1335,31 @@ int DHT_getfriendip(const DHT *dht, const uint8_t *public_key, IP_Port *ip_port)
return -1;
}
static void divide_by_2(uint8_t *public_key)
static void abs_divide_by_2(uint8_t *public_key_dist)
{
unsigned int i;
_Bool one = 0;
_Bool one = 0, abs = 0;
if (public_key_dist[0] & (1 << 7)) {
for (i = 0; i < crypto_box_PUBLICKEYBYTES; ++i) {
public_key_dist[i] = ~public_key_dist[i];
}
if (public_key_dist[crypto_box_PUBLICKEYBYTES - 1] != UINT8_MAX)
++public_key_dist[crypto_box_PUBLICKEYBYTES - 1];
}
for (i = 0; i < crypto_box_PUBLICKEYBYTES; ++i) {
_Bool temp = 0;
if (public_key[i] & (1)) {
if (public_key_dist[i] & (1)) {
temp = 1;
}
public_key[i] >>= 1;
public_key_dist[i] >>= 1;
if (one)
public_key[i] += (1 << 7);
public_key_dist[i] += (1 << 7);
one = temp;
}
@ -1364,7 +1373,7 @@ static void find_midpoint(uint8_t *out, const uint8_t *top, const uint8_t *bot)
out[i] = top[i] ^ bot[i];
}
divide_by_2(out);
abs_divide_by_2(out);
for (i = 0; i < crypto_box_PUBLICKEYBYTES; ++i) {
out[i] ^= bot[i];