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freebsd/lib/libgssapi/gss_inquire_context.c
Pedro F. Giffuni 6baf7cc80e libgssapi: avoid NULL pointer dereferences.
While here also use NULL instead of zero for pointers.

Found with coccinelle.

MFC after:	1 week
2016-04-13 21:08:02 +00:00

110 lines
3.1 KiB
C

/*-
* Copyright (c) 2005 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <gssapi/gssapi.h>
#include "mech_switch.h"
#include "context.h"
#include "name.h"
OM_uint32
gss_inquire_context(OM_uint32 *minor_status,
const gss_ctx_id_t context_handle,
gss_name_t *src_name,
gss_name_t *targ_name,
OM_uint32 *lifetime_rec,
gss_OID *mech_type,
OM_uint32 *ctx_flags,
int *locally_initiated,
int *open)
{
OM_uint32 major_status;
struct _gss_context *ctx = (struct _gss_context *) context_handle;
struct _gss_mech_switch *m = ctx->gc_mech;
struct _gss_name *name;
gss_name_t src_mn, targ_mn;
if (locally_initiated)
*locally_initiated = 0;
if (open)
*open = 0;
if (lifetime_rec)
*lifetime_rec = 0;
if (src_name)
*src_name = GSS_C_NO_NAME;
if (targ_name)
*targ_name = GSS_C_NO_NAME;
if (mech_type)
*mech_type = GSS_C_NO_OID;
src_mn = targ_mn = GSS_C_NO_NAME;
major_status = m->gm_inquire_context(minor_status,
ctx->gc_ctx,
src_name ? &src_mn : NULL,
targ_name ? &targ_mn : NULL,
lifetime_rec,
mech_type,
ctx_flags,
locally_initiated,
open);
if (major_status != GSS_S_COMPLETE) {
_gss_mg_error(m, major_status, *minor_status);
return (major_status);
}
if (src_name) {
name = _gss_make_name(m, src_mn);
if (!name) {
if (mech_type)
*mech_type = GSS_C_NO_OID;
m->gm_release_name(minor_status, &src_mn);
*minor_status = 0;
return (GSS_S_FAILURE);
}
*src_name = (gss_name_t) name;
}
if (targ_name) {
name = _gss_make_name(m, targ_mn);
if (!name) {
if (mech_type)
*mech_type = GSS_C_NO_OID;
if (src_name)
gss_release_name(minor_status, src_name);
m->gm_release_name(minor_status, &src_mn);
minor_status = NULL;
return (GSS_S_FAILURE);
}
*targ_name = (gss_name_t) name;
}
return (GSS_S_COMPLETE);
}