EVP_MDC2(3SSL) OpenSSL EVP_MDC2(3SSL)
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>.
3.5.7 2026-06-09 EVP_MDC2(3SSL)
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