diff options
Diffstat (limited to 'crypto/bn/bn_div.c')
| -rw-r--r-- | crypto/bn/bn_div.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/crypto/bn/bn_div.c b/crypto/bn/bn_div.c index b2efe5bb53..0fe58dbf69 100644 --- a/crypto/bn/bn_div.c +++ b/crypto/bn/bn_div.c @@ -227,9 +227,10 @@ int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor, * This is the part that corresponds to the current * 'area' being divided */ BN_init(&wnum); + wnum.flags = BN_FLG_STATIC_DATA; /* prevent accidental "expands" */ wnum.d= &(snum->d[loop]); wnum.top= div_n; - wnum.dmax= snum->dmax+1; /* a bit of a lie */ + wnum.dmax= snum->dmax - loop; /* so we don't step out of bounds */ /* Get the top 2 words of sdiv */ /* i=sdiv->top; */ @@ -248,6 +249,7 @@ int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor, /* space for temp */ if (!bn_wexpand(tmp,(div_n+1))) goto err; + bn_fix_top(&wnum); if (BN_ucmp(&wnum,sdiv) >= 0) { if (!BN_usub(&wnum,&wnum,sdiv)) goto err; @@ -346,7 +348,7 @@ X) -> 0x%08X\n", #endif /* !BN_DIV3W */ l0=bn_mul_words(tmp->d,sdiv->d,div_n,q); - wnum.d--; wnum.top++; + wnum.d--; wnum.top++; wnum.dmax++; tmp->d[div_n]=l0; /* XXX: Couldn't we replace this with; * tmp->top = div_n; |