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: src/lib/libgssapi/gss_import_sec_context.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
27 */
28
29#include "mech_locl.h"
30
31GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
32gss_import_sec_context(OM_uint32 *minor_status,
33    const gss_buffer_t interprocess_token,
34    gss_ctx_id_t *context_handle)
35{
36	OM_uint32 major_status;
37	gssapi_mech_interface m;
38	struct _gss_context *ctx;
39	gss_OID_desc mech_oid;
40	gss_buffer_desc buf;
41	unsigned char *p;
42	size_t len;
43
44	*minor_status = 0;
45	*context_handle = GSS_C_NO_CONTEXT;
46
47	/*
48	 * We added an oid to the front of the token in
49	 * gss_export_sec_context.
50	 */
51	p = interprocess_token->value;
52	len = interprocess_token->length;
53	if (len < 2)
54		return (GSS_S_DEFECTIVE_TOKEN);
55	mech_oid.length = (p[0] << 8) | p[1];
56	if (len < mech_oid.length + 2)
57		return (GSS_S_DEFECTIVE_TOKEN);
58	mech_oid.elements = p + 2;
59	buf.length = len - 2 - mech_oid.length;
60	buf.value = p + 2 + mech_oid.length;
61
62	m = __gss_get_mechanism(&mech_oid);
63	if (!m)
64		return (GSS_S_DEFECTIVE_TOKEN);
65
66	ctx = malloc(sizeof(struct _gss_context));
67	if (!ctx) {
68		*minor_status = ENOMEM;
69		return (GSS_S_FAILURE);
70	}
71	memset(ctx, 0, sizeof(struct _gss_context));
72	ctx->gc_mech = m;
73	major_status = m->gm_import_sec_context(minor_status,
74	    &buf, &ctx->gc_ctx);
75	if (major_status != GSS_S_COMPLETE) {
76		_gss_mg_error(m, *minor_status);
77		free(ctx);
78	} else {
79		*context_handle = (gss_ctx_id_t) ctx;
80	}
81
82	return (major_status);
83}
84