From: Geoff Thorpe <geoff@openssl.org>
Date: Thu, 6 Nov 2003 23:13:04 +0000 (+0000)
Subject: Add debug-screening of input parameters to some functions I'd missed
X-Git-Tag: BEN_FIPS_TEST_4^2~11^2~31
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=18f62d4b82cc3101f3e1ae026c5e077193cfca5b;p=openssl

Add debug-screening of input parameters to some functions I'd missed
before.
---

diff --git a/crypto/bn/bn_shift.c b/crypto/bn/bn_shift.c
index 513e686f86..69c03570bd 100644
--- a/crypto/bn/bn_shift.c
+++ b/crypto/bn/bn_shift.c
@@ -65,6 +65,9 @@ int BN_lshift1(BIGNUM *r, const BIGNUM *a)
 	register BN_ULONG *ap,*rp,t,c;
 	int i;
 
+	bn_check_top(r);
+	bn_check_top(a);
+
 	if (r != a)
 		{
 		r->neg=a->neg;
@@ -98,6 +101,9 @@ int BN_rshift1(BIGNUM *r, const BIGNUM *a)
 	BN_ULONG *ap,*rp,t,c;
 	int i;
 
+	bn_check_top(r);
+	bn_check_top(a);
+
 	if (BN_is_zero(a))
 		{
 		BN_zero(r);
@@ -129,6 +135,9 @@ int BN_lshift(BIGNUM *r, const BIGNUM *a, int n)
 	BN_ULONG *t,*f;
 	BN_ULONG l;
 
+	bn_check_top(r);
+	bn_check_top(a);
+
 	r->neg=a->neg;
 	nw=n/BN_BITS2;
 	if (bn_wexpand(r,a->top+nw+1) == NULL) return(0);
@@ -162,6 +171,9 @@ int BN_rshift(BIGNUM *r, const BIGNUM *a, int n)
 	BN_ULONG *t,*f;
 	BN_ULONG l,tmp;
 
+	bn_check_top(r);
+	bn_check_top(a);
+
 	nw=n/BN_BITS2;
 	rb=n%BN_BITS2;
 	lb=BN_BITS2-rb;