/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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 <stdlib.h>
#include <string.h>
#include <errno.h>
#include "mech_switch.h"
#include "utils.h"
#include "name.h"
static OM_uint32
_gss_import_export_name(OM_uint32 *minor_status,
const gss_buffer_t input_name_buffer,
gss_name_t *output_name)
{
OM_uint32 major_status;
unsigned char *p = input_name_buffer->value;
size_t len = input_name_buffer->length;
size_t t;
gss_OID_desc mech_oid;
struct _gss_mech_switch *m;
struct _gss_name *name;
gss_name_t new_canonical_name;
*minor_status = 0;
*output_name = 0;
/*
* Make sure that TOK_ID is {4, 1}.
*/
if (len < 2)
return (GSS_S_BAD_NAME);
if (p[0] != 4 || p[1] != 1)
return (GSS_S_BAD_NAME);
p += 2;
len -= 2;
/*
* Get the mech length and the name length and sanity
* check the size of of the buffer.
*/
if (len < 2)
return (GSS_S_BAD_NAME);
t = (p[0] << 8) + p[1];
p += 2;
len -= 2;
/*
* Check the DER encoded OID to make sure it agrees with the
* length we just decoded.
*/
if (p[0] != 6) /* 6=OID */
return (GSS_S_BAD_NAME);
p++;
len--;
t--;
if (p[0] & 0x80) {
int digits = p[0];
p++;
len--;
t--;
mech_oid.length = 0;
while (digits--) {
mech_oid.length = (mech_oid.length << 8) | p[0];
p++;
len--;
t--;
}
} else {
mech_oid.length = p[0];
p++;
len--;
t--;
}
if (mech_oid.length != t)
return (GSS_S_BAD_NAME);
mech_oid.elements = p;
if (len < t + 4)
return (GSS_S_BAD_NAME);
p += t;
len -= t;
t = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
p += 4;
len -= 4;
if (len != t)
return (GSS_S_BAD_NAME);
m = _gss_find_mech_switch(&mech_oid);
if (!m)
return (GSS_S_BAD_MECH);
/*
* Ask the mechanism to import the name.
*/
major_status = m->gm_import_name(minor_status,
input_name_buffer, GSS_C_NT_EXPORT_NAME, &new_canonical_name);
if (major_status != GSS_S_COMPLETE) {
_gss_mg_error(m, major_status, *minor_status);
return (major_status);
}
/*
* Now we make a new name and mark it as an MN.
*/
name = _gss_make_name(m, new_canonical_name);
if (!name) {
m->gm_release_name(minor_status, &new_canonical_name);
return (GSS_S_FAILURE);
}
*output_name = (gss_name_t) name;
*minor_status = 0;
return (GSS_S_COMPLETE);
}
OM_uint32
gss_import_name(OM_uint32 *minor_status,
const gss_buffer_t input_name_buffer,
const gss_OID input_name_type,
gss_name_t *output_name)
{
gss_OID name_type = input_name_type;
OM_uint32 major_status;
struct _gss_name *name;
*output_name = GSS_C_NO_NAME;
if (input_name_buffer->length == 0) {
*minor_status = 0;
return (GSS_S_BAD_NAME);
}
/*
* Use GSS_NT_USER_NAME as default name type.
*/
if (name_type == GSS_C_NO_OID)
name_type = GSS_C_NT_USER_NAME;
/*
* If this is an exported name, we need to parse it to find
* the mechanism and then import it as an MN. See RFC 2743
* section 3.2 for a description of the format.
*/
if (gss_oid_equal(name_type, GSS_C_NT_EXPORT_NAME)) {
return _gss_import_export_name(minor_status,
input_name_buffer, output_name);
}
/*
* Only allow certain name types. This is pretty bogus - we
* should figure out the list of supported name types using
* gss_inquire_names_for_mech.
*/
if (!gss_oid_equal(name_type, GSS_C_NT_USER_NAME)
&& !gss_oid_equal(name_type, GSS_C_NT_MACHINE_UID_NAME)
&& !gss_oid_equal(name_type, GSS_C_NT_STRING_UID_NAME)
&& !gss_oid_equal(name_type, GSS_C_NT_HOSTBASED_SERVICE_X)
&& !gss_oid_equal(name_type, GSS_C_NT_HOSTBASED_SERVICE)
&& !gss_oid_equal(name_type, GSS_C_NT_ANONYMOUS)
&& !gss_oid_equal(name_type, GSS_KRB5_NT_PRINCIPAL_NAME)) {
*minor_status = 0;
return (GSS_S_BAD_NAMETYPE);
}
*minor_status = 0;
name = malloc(sizeof(struct _gss_name));
if (!name) {
*minor_status = ENOMEM;
return (GSS_S_FAILURE);
}
memset(name, 0, sizeof(struct _gss_name));
major_status = _gss_copy_oid(minor_status,
name_type, &name->gn_type);
if (major_status) {
free(name);
return (GSS_S_FAILURE);
}
major_status = _gss_copy_buffer(minor_status,
input_name_buffer, &name->gn_value);
if (major_status) {
gss_name_t rname = (gss_name_t)name;
gss_release_name(minor_status, &rname);
return (GSS_S_FAILURE);
}
SLIST_INIT(&name->gn_mn);
*output_name = (gss_name_t) name;
return (GSS_S_COMPLETE);
}
