cm_ameth.c revision 392aa7cc7d2b122614c5393c3e357da07fd07af3
1/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
2 * project 2010.
3 */
4/* ====================================================================
5 * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in
16 *    the documentation and/or other materials provided with the
17 *    distribution.
18 *
19 * 3. All advertising materials mentioning features or use of this
20 *    software must display the following acknowledgment:
21 *    "This product includes software developed by the OpenSSL Project
22 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
23 *
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 *    endorse or promote products derived from this software without
26 *    prior written permission. For written permission, please contact
27 *    licensing@OpenSSL.org.
28 *
29 * 5. Products derived from this software may not be called "OpenSSL"
30 *    nor may "OpenSSL" appear in their names without prior written
31 *    permission of the OpenSSL Project.
32 *
33 * 6. Redistributions of any form whatsoever must retain the following
34 *    acknowledgment:
35 *    "This product includes software developed by the OpenSSL Project
36 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
51 */
52
53#include <stdio.h>
54#include "cryptlib.h"
55#include <openssl/evp.h>
56#include <openssl/cmac.h>
57#include "asn1_locl.h"
58
59/* CMAC "ASN1" method. This is just here to indicate the
60 * maximum CMAC output length and to free up a CMAC
61 * key.
62 */
63
64static int cmac_size(const EVP_PKEY *pkey)
65	{
66	return EVP_MAX_BLOCK_LENGTH;
67	}
68
69static void cmac_key_free(EVP_PKEY *pkey)
70	{
71	CMAC_CTX *cmctx = (CMAC_CTX *)pkey->pkey.ptr;
72	if (cmctx)
73		CMAC_CTX_free(cmctx);
74	}
75
76const EVP_PKEY_ASN1_METHOD cmac_asn1_meth =
77	{
78	EVP_PKEY_CMAC,
79	EVP_PKEY_CMAC,
80	0,
81
82	"CMAC",
83	"OpenSSL CMAC method",
84
85	0,0,0,0,
86
87	0,0,0,
88
89	cmac_size,
90	0,
91	0,0,0,0,0,0,0,
92
93	cmac_key_free,
94	0,
95	0,0
96	};
97
98