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225 lines
5.6 KiB
C
225 lines
5.6 KiB
C
/*-
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* Copyright (c) 2005 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <gssapi/gssapi.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "mech_switch.h"
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#include "utils.h"
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#include "name.h"
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static OM_uint32
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_gss_import_export_name(OM_uint32 *minor_status,
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const gss_buffer_t input_name_buffer,
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gss_name_t *output_name)
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{
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OM_uint32 major_status;
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unsigned char *p = input_name_buffer->value;
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size_t len = input_name_buffer->length;
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size_t t;
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gss_OID_desc mech_oid;
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struct _gss_mech_switch *m;
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struct _gss_name *name;
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gss_name_t new_canonical_name;
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*minor_status = 0;
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*output_name = 0;
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/*
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* Make sure that TOK_ID is {4, 1}.
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*/
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if (len < 2)
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return (GSS_S_BAD_NAME);
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if (p[0] != 4 || p[1] != 1)
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return (GSS_S_BAD_NAME);
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p += 2;
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len -= 2;
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/*
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* Get the mech length and the name length and sanity
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* check the size of of the buffer.
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*/
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if (len < 2)
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return (GSS_S_BAD_NAME);
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t = (p[0] << 8) + p[1];
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p += 2;
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len -= 2;
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/*
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* Check the DER encoded OID to make sure it agrees with the
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* length we just decoded.
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*/
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if (p[0] != 6) /* 6=OID */
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return (GSS_S_BAD_NAME);
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p++;
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len--;
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t--;
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if (p[0] & 0x80) {
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int digits = p[0];
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p++;
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len--;
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t--;
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mech_oid.length = 0;
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while (digits--) {
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mech_oid.length = (mech_oid.length << 8) | p[0];
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p++;
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len--;
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t--;
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}
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} else {
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mech_oid.length = p[0];
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p++;
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len--;
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t--;
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}
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if (mech_oid.length != t)
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return (GSS_S_BAD_NAME);
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mech_oid.elements = p;
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if (len < t + 4)
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return (GSS_S_BAD_NAME);
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p += t;
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len -= t;
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t = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
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p += 4;
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len -= 4;
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if (len != t)
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return (GSS_S_BAD_NAME);
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m = _gss_find_mech_switch(&mech_oid);
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if (!m)
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return (GSS_S_BAD_MECH);
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/*
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* Ask the mechanism to import the name.
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*/
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major_status = m->gm_import_name(minor_status,
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input_name_buffer, GSS_C_NT_EXPORT_NAME, &new_canonical_name);
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if (major_status != GSS_S_COMPLETE) {
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_gss_mg_error(m, major_status, *minor_status);
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return (major_status);
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}
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/*
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* Now we make a new name and mark it as an MN.
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*/
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name = _gss_make_name(m, new_canonical_name);
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if (!name) {
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m->gm_release_name(minor_status, &new_canonical_name);
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return (GSS_S_FAILURE);
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}
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*output_name = (gss_name_t) name;
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*minor_status = 0;
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return (GSS_S_COMPLETE);
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}
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OM_uint32
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gss_import_name(OM_uint32 *minor_status,
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const gss_buffer_t input_name_buffer,
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const gss_OID input_name_type,
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gss_name_t *output_name)
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{
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gss_OID name_type = input_name_type;
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OM_uint32 major_status;
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struct _gss_name *name;
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*output_name = GSS_C_NO_NAME;
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if (input_name_buffer->length == 0) {
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*minor_status = 0;
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return (GSS_S_BAD_NAME);
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}
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/*
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* Use GSS_NT_USER_NAME as default name type.
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*/
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if (name_type == GSS_C_NO_OID)
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name_type = GSS_C_NT_USER_NAME;
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/*
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* If this is an exported name, we need to parse it to find
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* the mechanism and then import it as an MN. See RFC 2743
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* section 3.2 for a description of the format.
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*/
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if (gss_oid_equal(name_type, GSS_C_NT_EXPORT_NAME)) {
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return _gss_import_export_name(minor_status,
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input_name_buffer, output_name);
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}
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/*
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* Only allow certain name types. This is pretty bogus - we
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* should figure out the list of supported name types using
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* gss_inquire_names_for_mech.
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*/
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if (!gss_oid_equal(name_type, GSS_C_NT_USER_NAME)
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&& !gss_oid_equal(name_type, GSS_C_NT_MACHINE_UID_NAME)
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&& !gss_oid_equal(name_type, GSS_C_NT_STRING_UID_NAME)
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&& !gss_oid_equal(name_type, GSS_C_NT_HOSTBASED_SERVICE_X)
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&& !gss_oid_equal(name_type, GSS_C_NT_HOSTBASED_SERVICE)
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&& !gss_oid_equal(name_type, GSS_C_NT_ANONYMOUS)
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&& !gss_oid_equal(name_type, GSS_KRB5_NT_PRINCIPAL_NAME)) {
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*minor_status = 0;
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return (GSS_S_BAD_NAMETYPE);
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}
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*minor_status = 0;
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name = malloc(sizeof(struct _gss_name));
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if (!name) {
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*minor_status = ENOMEM;
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return (GSS_S_FAILURE);
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}
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memset(name, 0, sizeof(struct _gss_name));
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major_status = _gss_copy_oid(minor_status,
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name_type, &name->gn_type);
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if (major_status) {
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free(name);
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return (GSS_S_FAILURE);
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}
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major_status = _gss_copy_buffer(minor_status,
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input_name_buffer, &name->gn_value);
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if (major_status) {
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gss_name_t rname = (gss_name_t)name;
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gss_release_name(minor_status, &rname);
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return (GSS_S_FAILURE);
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}
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SLIST_INIT(&name->gn_mn);
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*output_name = (gss_name_t) name;
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return (GSS_S_COMPLETE);
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}
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