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_export_sec_context.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
27  */
28 
29 #include "mech_locl.h"
30 
31 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
32 gss_export_sec_context(OM_uint32 *minor_status,
33     gss_ctx_id_t *context_handle,
34     gss_buffer_t interprocess_token)
35 {
36 	OM_uint32 major_status;
37 	struct _gss_context *ctx = (struct _gss_context *) *context_handle;
38 	gssapi_mech_interface m = ctx->gc_mech;
39 	gss_buffer_desc buf;
40 
41 	_mg_buffer_zero(interprocess_token);
42 
43 	major_status = m->gm_export_sec_context(minor_status,
44 	    &ctx->gc_ctx, &buf);
45 
46 	if (major_status == GSS_S_COMPLETE) {
47 		unsigned char *p;
48 
49 		free(ctx);
50 		*context_handle = GSS_C_NO_CONTEXT;
51 		interprocess_token->length = buf.length
52 			+ 2 + m->gm_mech_oid.length;
53 		interprocess_token->value = malloc(interprocess_token->length);
54 		if (!interprocess_token->value) {
55 			/*
56 			 * We are in trouble here - the context is
57 			 * already gone. This is allowed as long as we
58 			 * set the caller's context_handle to
59 			 * GSS_C_NO_CONTEXT, which we did above.
60 			 * Return GSS_S_FAILURE.
61 			 */
62 			_mg_buffer_zero(interprocess_token);
63 			*minor_status = ENOMEM;
64 			return (GSS_S_FAILURE);
65 		}
66 		p = interprocess_token->value;
67 		p[0] = m->gm_mech_oid.length >> 8;
68 		p[1] = m->gm_mech_oid.length;
69 		memcpy(p + 2, m->gm_mech_oid.elements, m->gm_mech_oid.length);
70 		memcpy(p + 2 + m->gm_mech_oid.length, buf.value, buf.length);
71 		gss_release_buffer(minor_status, &buf);
72 	} else {
73 		_gss_mg_error(m, major_status, *minor_status);
74 	}
75 
76 	return (major_status);
77 }
78