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add a sanity check on target size

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Jethro Grassie 2019-02-09 18:20:06 -05:00
parent 6b9c012574
commit 7cff0f5d5c
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GPG key ID: DE8ED755616565BB
1 changed files with 10 additions and 3 deletions
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13
src/pool.c
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@ -1007,6 +1007,16 @@ target_to_hex(uint64_t target, char *target_hex)
BN_bn2bin(res, &bnb[0]); BN_bn2bin(res, &bnb[0]);
size_t cc = 4 - (32 - BN_num_bytes(res)); size_t cc = 4 - (32 - BN_num_bytes(res));
BN_free(bnt);
BN_free(res);
if (cc > 4 || cc == 0)
{
log_warn("Requested target too big/small: %llu", target);
target_hex[1] = '1';
return;
}
char *ph = &target_hex[0]; char *ph = &target_hex[0];
while (cc) while (cc)
{ {
@ -1014,9 +1024,6 @@ target_to_hex(uint64_t target, char *target_hex)
bin_to_hex((const char*)&c, 1, ph++); bin_to_hex((const char*)&c, 1, ph++);
ph++; ph++;
} }
BN_free(bnt);
BN_free(res);
} }
static char * static char *