Line data    Source code

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