Updated: 2022/Sep/29

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EVP_mdc2(3)                         OpenSSL                        EVP_mdc2(3)



NAME
       EVP_mdc2 - MDC-2 For EVP

LIBRARY
       libcrypto, -lcrypto

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>.



3.0.12                            2023-10-25                       EVP_mdc2(3)