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.\" $OpenBSD: EVP_sm3.3,v 1.1 2019/08/25 17:08:20 schwarze Exp $
.\" full merge up to: OpenSSL 21ebd2fc Aug 24 20:38:04 2018 +0800
.\"
.\" This file was written by Jack Lloyd <jack.lloyd@ribose.com>
.\" and Ronald Tse <ronald.tse@ribose.com>.
.\" Copyright (c) 2017 The OpenSSL Project. All rights reserved.
.\" Copyright (c) 2017 Ribose Inc. All Rights Reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\"
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in
.\" the documentation and/or other materials provided with the
.\" distribution.
.\"
.\" 3. All advertising materials mentioning features or use of this
.\" software must display the following acknowledgment:
.\" "This product includes software developed by the OpenSSL Project
.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
.\"
.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
.\" endorse or promote products derived from this software without
.\" prior written permission. For written permission, please contact
.\" openssl-core@openssl.org.
.\"
.\" 5. Products derived from this software may not be called "OpenSSL"
.\" nor may "OpenSSL" appear in their names without prior written
.\" permission of the OpenSSL Project.
.\"
.\" 6. Redistributions of any form whatsoever must retain the following
.\" acknowledgment:
.\" "This product includes software developed by the OpenSSL Project
.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)"
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
.\" OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd $Mdocdate: August 25 2019 $
.Dt EVP_SM3 3
.Os
.Sh NAME
.Nm EVP_sm3
.Nd SM3 hash function for EVP
.Sh SYNOPSIS
.In openssl/evp.h
.Ft const EVP_MD *
.Fn EVP_sm3 void
.Sh DESCRIPTION
SM3 is a cryptographic hash function with a 256-bit output.
It is part of the Chinese
.Dq Commercial Cryptography
suite of algorithms which is required
for certain commercial applications in China.
.Sh RETURN VALUES
.Fn EVP_sm3
returns a pointer to a static
.Vt EVP_MD
object implementing the SM3 hash function.
.Sh SEE ALSO
.Xr evp 3 ,
.Xr EVP_DigestInit 3
.Sh STANDARDS
GB/T 32905-2016 and GM/T 0004-2012
.Sh HISTORY
.Fn EVP_sm3
first appeared in OpenSSL 1.1.1 and has been available since
.Ox 6.5 .
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