diff options
Diffstat (limited to 'openssl/trunk/crypto/bn/bn_prime.c')
| -rw-r--r-- | openssl/trunk/crypto/bn/bn_prime.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/openssl/trunk/crypto/bn/bn_prime.c b/openssl/trunk/crypto/bn/bn_prime.c index d57f6582..5bab0195 100644 --- a/openssl/trunk/crypto/bn/bn_prime.c +++ b/openssl/trunk/crypto/bn/bn_prime.c @@ -378,13 +378,14 @@ static int probable_prime(BIGNUM *rnd, int bits) { int i; BN_ULONG mods[NUMPRIMES]; - BN_ULONG delta,d; + BN_ULONG delta,maxdelta; again: if (!BN_rand(rnd,bits,1,1)) return(0); /* we now have a random number 'rand' to test. */ for (i=1; i<NUMPRIMES; i++) mods[i]=BN_mod_word(rnd,(BN_ULONG)primes[i]); + maxdelta=BN_MASK2 - primes[NUMPRIMES-1]; delta=0; loop: for (i=1; i<NUMPRIMES; i++) { @@ -392,12 +393,8 @@ again: * that gcd(rnd-1,primes) == 1 (except for 2) */ if (((mods[i]+delta)%primes[i]) <= 1) { - d=delta; delta+=2; - /* perhaps need to check for overflow of - * delta (but delta can be up to 2^32) - * 21-May-98 eay - added overflow check */ - if (delta < d) goto again; + if (delta > maxdelta) goto again; goto loop; } } |