diff options
| author | Bodo Möller <bodo@openssl.org> | 2000-09-19 18:02:15 +0000 |
|---|---|---|
| committer | Bodo Möller <bodo@openssl.org> | 2000-09-19 18:02:15 +0000 |
| commit | a45bd29535a26a982eaef9be85822d08cbb49b0f (patch) | |
| tree | 7f5af5b1f7a99adf8fef69f250820939e0744512 /crypto/bn/bn_mont.c | |
| parent | 688fbf547568f6440cadbbf31cc9da1576a57f67 (diff) | |
Document BN_mod_mul_montgomery bug;
make disabled code slightly more correct (this does not solve
the problem though).
Diffstat (limited to 'crypto/bn/bn_mont.c')
| -rw-r--r-- | crypto/bn/bn_mont.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c index 932f5cecef..8fb171e132 100644 --- a/crypto/bn/bn_mont.c +++ b/crypto/bn/bn_mont.c @@ -85,7 +85,8 @@ int BN_mod_mul_montgomery(BIGNUM *r, BIGNUM *a, BIGNUM *b, if (a == b) { -#if 0 /* buggy -- try squaring g in the following parameters +#if 0 /* buggy -- try squaring g (after converting it to Montgomery + representation) in the following parameters (but note that squaring 2 or 4 works): Diffie-Hellman-Parameters: (1024 bit) prime: @@ -109,7 +110,7 @@ Sgh5jjQE3e+VGbPNOkMbMCsKbfJfFDdP4TVtbVHCReSFtXZiXn7G9ExC6aY37WsL bn_wexpand(tmp2,a->top*4); bn_sqr_recursive(tmp->d,a->d,a->top,tmp2->d); tmp->top=a->top*2; - if (tmp->top > 0 && tmp->d[tmp->top-1] == 0) + while (tmp->top > 0 && tmp->d[tmp->top-1] == 0) tmp->top--; #else if (!BN_sqr(tmp,a,ctx)) goto err; |