cm_ameth.c

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/* Written by Dr Stephen N Henson ([email protected]) for the OpenSSL
 * project 2010.
 */
/* ====================================================================
 * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *    prior written permission. For written permission, please contact
 *    [email protected].
 *
 * 5. Products derived from this software may not be called "OpenSSL"
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 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/evp.h>
#include <openssl/cmac.h>
#include "asn1_locl.h"

/* CMAC "ASN1" method. This is just here to indicate the
 * maximum CMAC output length and to free up a CMAC
 * key.
 */

static int cmac_size(const EVP_PKEY *pkey)
    {
    return EVP_MAX_BLOCK_LENGTH;
    }

static void cmac_key_free(EVP_PKEY *pkey)
    {
    CMAC_CTX *cmctx = (CMAC_CTX *)pkey->pkey.ptr;
    if (cmctx)
        CMAC_CTX_free(cmctx);
    }

const EVP_PKEY_ASN1_METHOD cmac_asn1_meth = 
    {
    EVP_PKEY_CMAC,
    EVP_PKEY_CMAC,
    0,

    "CMAC",
    "OpenSSL CMAC method",

    0,0,0,0,

    0,0,0,

    cmac_size,
    0,
    0,0,0,0,0,0,0,

    cmac_key_free,
    0,
    0,0
    };