/* $OpenBSD: cm_ameth.c,v 1.11 2024/01/04 17:01:26 tb Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2010.
 */
/* ====================================================================
 * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
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 * 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
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 * 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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 *    licensing@OpenSSL.org.
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 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
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 */

#include <stdio.h>

#include <openssl/cmac.h>
#include <openssl/evp.h>

#include "asn1_local.h"
#include "evp_local.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_free(pkey->pkey.ptr);
}

const EVP_PKEY_ASN1_METHOD cmac_asn1_meth = {
	.base_method = &cmac_asn1_meth,
	.pkey_id = EVP_PKEY_CMAC,

	.pem_str = "CMAC",
	.info = "OpenSSL CMAC method",

	.pkey_size = cmac_size,
	.pkey_free = cmac_key_free
};