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.IX Title "EVP_MDC2 3SSL"
.TH EVP_MDC2 3SSL 2024-04-04 3.2.2-dev OpenSSL
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.SH NAME
EVP_mdc2
\&\- MDC\-2 For EVP
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& const EVP_MD *EVP_mdc2(void);
.Ve
.SH DESCRIPTION
.IX Header "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.
.IP \fBEVP_mdc2()\fR 4
.IX Item "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.
.SH NOTES
.IX Header "NOTES"
Developers should be aware of the negative performance implications of
calling this function multiple times and should consider using
\&\fBEVP_MD_fetch\fR\|(3) with \fBEVP_MD\-MDC2\fR\|(7) instead.
See "Performance" in \fBcrypto\fR\|(7) for further information.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
These functions return a \fBEVP_MD\fR structure that contains the
implementation of the message digest. See \fBEVP_MD_meth_new\fR\|(3) for
details of the \fBEVP_MD\fR structure.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
ISO/IEC 10118\-2:2000 Hash-Function 2, with DES as the underlying block cipher.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBevp\fR\|(7),
\&\fBprovider\fR\|(7),
\&\fBEVP_DigestInit\fR\|(3)
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright 2017\-2023 The OpenSSL Project Authors. All Rights Reserved.
.PP
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>.