diff options
| -rw-r--r-- | crypto/bn/bn_gf2m.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/crypto/bn/bn_gf2m.c b/crypto/bn/bn_gf2m.c index 0bfb56971e..e54a701166 100644 --- a/crypto/bn/bn_gf2m.c +++ b/crypto/bn/bn_gf2m.c @@ -631,8 +631,11 @@ int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx) } if (ubits==vbits) { - bn_correct_top(u); - ubits = BN_num_bits(u); + BN_ULONG u; + int utop = (ubits-1)/BN_BITS2; + + while ((u=udp[utop])==0 && utop) utop--; + ubits = utop*BN_BITS2 + BN_num_bits_word(u); } } bn_correct_top(b); |