gss_export_sec_context.c revision 168340 
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: head/lib/libgssapi/gss_export_sec_context.c 168340 2007-04-04 02:40:59Z kan $
27 */
28
29#include <gssapi/gssapi.h>
30#include <stdlib.h>
31#include <string.h>
32#include <errno.h>
33
34#include "mech_switch.h"
35#include "context.h"
36
37OM_uint32
38gss_export_sec_context(OM_uint32 *minor_status,
39    gss_ctx_id_t *context_handle,
40    gss_buffer_t interprocess_token)
41{
42	OM_uint32 major_status;
43	struct _gss_context *ctx = (struct _gss_context *) *context_handle;
44	struct _gss_mech_switch *m = ctx->gc_mech;
45	gss_buffer_desc buf;
46
47	major_status = m->gm_export_sec_context(minor_status,
48	    &ctx->gc_ctx, &buf);
49
50	if (major_status == GSS_S_COMPLETE) {
51		unsigned char *p;
52
53		free(ctx);
54		*context_handle = GSS_C_NO_CONTEXT;
55		interprocess_token->length = buf.length
56			+ 2 + m->gm_mech_oid.length;
57		interprocess_token->value = malloc(interprocess_token->length);
58		if (!interprocess_token->value) {
59			/*
60			 * We are in trouble here - the context is
61			 * already gone. This is allowed as long as we
62			 * set the caller's context_handle to
63			 * GSS_C_NO_CONTEXT, which we did above.
64			 * Return GSS_S_FAILURE.
65			 */
66			*minor_status = ENOMEM;
67			return (GSS_S_FAILURE);
68		}
69		p = interprocess_token->value;
70		p[0] = m->gm_mech_oid.length >> 8;
71		p[1] = m->gm_mech_oid.length;
72		memcpy(p + 2, m->gm_mech_oid.elements, m->gm_mech_oid.length);
73		memcpy(p + 2 + m->gm_mech_oid.length, buf.value, buf.length);
74		gss_release_buffer(minor_status, &buf);
75	}
76
77	return (major_status);
78}
79