1/*-
2 * Copyright (c) 2005 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *	$FreeBSD$
27 */
28
29#include <gssapi/gssapi.h>
30#include <stdlib.h>
31#include <errno.h>
32
33#include "mech_switch.h"
34#include "context.h"
35
36OM_uint32
37gss_import_sec_context(OM_uint32 *minor_status,
38    const gss_buffer_t interprocess_token,
39    gss_ctx_id_t *context_handle)
40{
41	OM_uint32 major_status;
42	struct _gss_mech_switch *m;
43	struct _gss_context *ctx;
44	gss_OID_desc mech_oid;
45	gss_buffer_desc buf;
46	unsigned char *p;
47	size_t len;
48
49	*minor_status = 0;
50	*context_handle = GSS_C_NO_CONTEXT;
51
52	/*
53	 * We added an oid to the front of the token in
54	 * gss_export_sec_context.
55	 */
56	p = interprocess_token->value;
57	len = interprocess_token->length;
58	if (len < 2)
59		return (GSS_S_DEFECTIVE_TOKEN);
60	mech_oid.length = (p[0] << 8) | p[1];
61	if (len < mech_oid.length + 2)
62		return (GSS_S_DEFECTIVE_TOKEN);
63	mech_oid.elements = p + 2;
64	buf.length = len - 2 - mech_oid.length;
65	buf.value = p + 2 + mech_oid.length;
66
67	m = _gss_find_mech_switch(&mech_oid);
68	if (!m)
69		return (GSS_S_DEFECTIVE_TOKEN);
70
71	ctx = malloc(sizeof(struct _gss_context));
72	if (!ctx) {
73		*minor_status = ENOMEM;
74		return (GSS_S_FAILURE);
75	}
76	ctx->gc_mech = m;
77	major_status = m->gm_import_sec_context(minor_status,
78	    &buf, &ctx->gc_ctx);
79	if (major_status != GSS_S_COMPLETE) {
80		_gss_mg_error(m, major_status, *minor_status);
81		free(ctx);
82	} else {
83		*context_handle = (gss_ctx_id_t) ctx;
84	}
85
86	return (major_status);
87}
88