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Add a method to generate a prime that is guaranteed not to be divisible by 3 or 5.
[oweals/openssl.git]
/
crypto
/
bn
/
bn_exp.c
diff --git
a/crypto/bn/bn_exp.c
b/crypto/bn/bn_exp.c
index baeda372cf5c0d70d552459945ccf6a0d90fdff4..ea2bd0a8984bb29a4ef537817ccf0361d9c5102a 100644
(file)
--- a/
crypto/bn/bn_exp.c
+++ b/
crypto/bn/bn_exp.c
@@
-494,6
+494,9
@@
int BN_mod_exp_mont(BIGNUM *rr, const BIGNUM *a, const BIGNUM *p,
r->d[0] = (0-m->d[0])&BN_MASK2;
for(i=1;i<j;i++) r->d[i] = (~m->d[i])&BN_MASK2;
r->top = j;
+ /* Upper words will be zero if the corresponding words of 'm'
+ * were 0xfff[...], so decrement r->top accordingly. */
+ bn_correct_top(r);
}
else
#endif