NAME

       EVP_mdc2 - MDC-2 For EVP

SYNOPSIS

        #include <openssl/evp.h>

        const EVP_MD *EVP_mdc2(void);

DESCRIPTION

       MDC-2 (Modification Detection Code 2 or Meyer-Schilling) is a cryptographic hash function based on a
       block cipher. This implementation is only available with the legacy provider.

       EVP_mdc2()
           The  MDC-2DES algorithm of using MDC-2 with the DES block cipher. It produces a 128-bit output from a
           given input.

NOTES

       Developers should be aware of the negative performance implications of  calling  this  function  multiple
       times  and  should  consider  using  EVP_MD_fetch(3)  with  EVP_MD-MDC2(7) instead.  See "Performance" in
       crypto(7) for further information.

RETURN VALUES

       These functions return a EVP_MD structure that contains the implementation of  the  message  digest.  See
       EVP_MD_meth_new(3) for details of the EVP_MD structure.

CONFORMING TO

       ISO/IEC 10118-2:2000 Hash-Function 2, with DES as the underlying block cipher.

SEE ALSO

       evp(7), provider(7), EVP_DigestInit(3)

COPYRIGHT

       Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved.

       Licensed  under  the  Apache License 2.0 (the "License").  You may not use this file except in compliance
       with the License.  You can obtain  a  copy  in  the  file  LICENSE  in  the  source  distribution  or  at
       <https://www.openssl.org/source/license.html>.

3.5.0                                              2025-06-04                                     EVP_MDC2(3SSL)