diff options
| author | Dr. Stephen Henson <steve@openssl.org> | 2001-02-28 00:51:48 +0000 |
|---|---|---|
| committer | Dr. Stephen Henson <steve@openssl.org> | 2001-02-28 00:51:48 +0000 |
| commit | 3d2e469cfab1ea3a0515bfe006319210da3ff4fb (patch) | |
| tree | c83a1504d4bbf8e1450e2965abb967cd6cbde6c0 /crypto/bn/bn_div.c | |
| parent | bf401a2aef5a130ef21de4575f3a7c3d7a6f5e2a (diff) | |
Fix a bug which caused BN_div to produce the
wrong result if rm==num and num < 0.
Diffstat (limited to 'crypto/bn/bn_div.c')
| -rw-r--r-- | crypto/bn/bn_div.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/crypto/bn/bn_div.c b/crypto/bn/bn_div.c index 7bee1dcc72..bbd0994008 100644 --- a/crypto/bn/bn_div.c +++ b/crypto/bn/bn_div.c @@ -342,9 +342,13 @@ int BN_div(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num, const BIGNUM *divisor, } if (rm != NULL) { + /* Keep a copy of the neg flag in num because if rm==num + * BN_rshift() will overwrite it. + */ + int neg = num->neg; BN_rshift(rm,snum,norm_shift); if (!BN_is_zero(rm)) - rm->neg = num->neg; + rm->neg = neg; } BN_CTX_end(ctx); return(1); |