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yggdrasil-go/contrib/yggdrasil-brute-simple/util.c

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#include "yggdrasil-brute.h"
int find_where(unsigned char hash[64], unsigned char besthashlist[NUMKEYS][64]) {
/* Where to insert hash into sorted hashlist */
int j;
int where = -1;
for (j = 0; j < NUMKEYS; ++j) {
if (memcmp(hash, besthashlist[j], 64) > 0) ++where;
else break;
}
return where;
}
void insert_64(unsigned char itemlist[NUMKEYS][64], unsigned char item[64], int where) {
int j;
for (j = 0; j < where; ++j) {
memcpy(itemlist[j], itemlist[j+1], 64);
}
memcpy(itemlist[where], item, 64);
}
void insert_32(unsigned char itemlist[NUMKEYS][32], unsigned char item[32], int where) {
int j;
for (j = 0; j < where; ++j) {
memcpy(itemlist[j], itemlist[j+1], 32);
}
memcpy(itemlist[where], item, 32);
}
void make_addr(unsigned char addr[32], unsigned char hash[64]) {
/* Public key hash to yggdrasil ipv6 address */
int i;
int offset;
unsigned char mask;
unsigned char c;
int ones = 0;
unsigned char br = 0; /* false */
for (i = 0; i < 64 && !br; ++i) {
mask = 128;
c = hash[i];
while (mask) {
if (c & mask) {
++ones;
} else {
br = 1; /* true */
break;
}
mask >>= 1;
}
}
addr[0] = 2;
addr[1] = ones;
offset = ones + 1;
for (i = 0; i < 14; ++i) {
c = hash[offset/8] << (offset%8);
c |= hash[offset/8 + 1] >> (8 - offset%8);
addr[i + 2] = c;
offset += 8;
}
}