xref: /freebsd/sys/kgssapi/gss_get_mic.c (revision abd87254)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
5  * Authors: Doug Rabson <dfr@rabson.org>
6  * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/kobj.h>
33 #include <sys/malloc.h>
34 #include <sys/mbuf.h>
35 
36 #include <kgssapi/gssapi.h>
37 #include <kgssapi/gssapi_impl.h>
38 
39 #include "kgss_if.h"
40 
41 OM_uint32
42 gss_get_mic(OM_uint32 *minor_status,
43     const gss_ctx_id_t ctx,
44     gss_qop_t qop_req,
45     const gss_buffer_t message_buffer,
46     gss_buffer_t message_token)
47 {
48 	OM_uint32 maj_stat;
49 	struct mbuf *m, *mic;
50 
51 	if (!ctx) {
52 		*minor_status = 0;
53 		return (GSS_S_NO_CONTEXT);
54 	}
55 
56 	MGET(m, M_WAITOK, MT_DATA);
57 	if (message_buffer->length > MLEN)
58 		MCLGET(m, M_WAITOK);
59 	m_append(m, message_buffer->length, message_buffer->value);
60 
61 	maj_stat = KGSS_GET_MIC(ctx, minor_status, qop_req, m, &mic);
62 
63 	m_freem(m);
64 	if (maj_stat == GSS_S_COMPLETE) {
65 		message_token->length = m_length(mic, NULL);
66 		message_token->value = malloc(message_token->length,
67 		    M_GSSAPI, M_WAITOK);
68 		m_copydata(mic, 0, message_token->length,
69 		    message_token->value);
70 		m_freem(mic);
71 	}
72 
73 	return (maj_stat);
74 }
75 
76 OM_uint32
77 gss_get_mic_mbuf(OM_uint32 *minor_status, const gss_ctx_id_t ctx,
78     gss_qop_t qop_req, struct mbuf *m, struct mbuf **micp)
79 {
80 
81 	if (!ctx) {
82 		*minor_status = 0;
83 		return (GSS_S_NO_CONTEXT);
84 	}
85 
86 	return (KGSS_GET_MIC(ctx, minor_status, qop_req, m, micp));
87 }
88