diff options
| -rw-r--r-- | crypto/bn/bn_exp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/crypto/bn/bn_exp.c b/crypto/bn/bn_exp.c index 5adb441870..3fa8cda842 100644 --- a/crypto/bn/bn_exp.c +++ b/crypto/bn/bn_exp.c @@ -493,6 +493,9 @@ 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 |