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.\" ========================================================================
.\"
.IX Title "EVP_DESX_CBC 3ossl"
.TH EVP_DESX_CBC 3ossl "2026-01-16" "3.5.1" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
EVP_desx_cbc
\&\- EVP DES\-X cipher
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& const EVP_CIPHER *EVP_desx_cbc(void);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The DES-X encryption algorithm for \s-1EVP.\s0
.PP
All modes below use a key length of 128 bits and acts on blocks of 128\-bits.
.IP "\fBEVP_desx_cbc()\fR" 4
.IX Item "EVP_desx_cbc()"
The DES-X algorithm in \s-1CBC\s0 mode.
.Sp
This algorithm is not provided by the OpenSSL default provider.
To use it is necessary to load either the OpenSSL legacy provider or another
implementation.
.PP
Developers should be aware of the negative performance implications of
calling this function multiple times and should consider using
\&\fBEVP_CIPHER_fetch\fR\|(3) with \s-1\fBEVP_CIPHER\-DES\s0\fR\|(7) instead.
See \*(L"Performance\*(R" in \fBcrypto\fR\|(7) for further information.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
These functions return an \fB\s-1EVP_CIPHER\s0\fR structure that contains the
implementation of the symmetric cipher. See \fBEVP_CIPHER_meth_new\fR\|(3) for
details of the \fB\s-1EVP_CIPHER\s0\fR structure.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBevp\fR\|(7),
\&\fBEVP_EncryptInit\fR\|(3),
\&\fBEVP_CIPHER_meth_new\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 \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.
