diff options
Diffstat (limited to 'nss/makedb.c')
| -rw-r--r-- | nss/makedb.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/nss/makedb.c b/nss/makedb.c index 8d7d027..e372f5d 100644 --- a/nss/makedb.c +++ b/nss/makedb.c @@ -591,13 +591,16 @@ copy_valstr (const void *nodep, const VISIT which, const int depth) } +/* Determine if the candidate is prime by using a modified trial division + algorithm. The candidate must be both odd and greater than 4. */ static int is_prime (size_t candidate) { - /* No even number and none less than 10 will be passed here. */ size_t divn = 3; size_t sq = divn * divn; + assert (candidate > 4 && candidate % 2 != 0); + while (sq < candidate && candidate % divn != 0) { ++divn; @@ -612,8 +615,8 @@ is_prime (size_t candidate) static size_t next_prime (size_t seed) { - /* Make it definitely odd. */ - seed |= 1; + /* Make sure that we're always greater than 4. */ + seed = (seed + 4) | 1; while (!is_prime (seed)) seed += 2; |