1=pod 2 3=head1 NAME 4 5EVP_sm3 6- SM3 for EVP 7 8=head1 SYNOPSIS 9 10 #include <openssl/evp.h> 11 12 const EVP_MD *EVP_sm3(void); 13 14=head1 DESCRIPTION 15 16SM3 is a cryptographic hash function with a 256-bit output, defined in GB/T 1732905-2016. 18 19=over 4 20 21=item EVP_sm3() 22 23The SM3 hash function. 24 25=back 26 27=head1 NOTES 28 29Developers should be aware of the negative performance implications of 30calling this function multiple times and should consider using 31L<EVP_MD_fetch(3)> with L<EVP_MD-SM3(7)> instead. 32See L<crypto(7)/Performance> for further information. 33 34=head1 RETURN VALUES 35 36These functions return a B<EVP_MD> structure that contains the 37implementation of the message digest. See L<EVP_MD_meth_new(3)> for 38details of the B<EVP_MD> structure. 39 40=head1 CONFORMING TO 41 42GB/T 32905-2016 and GM/T 0004-2012. 43 44=head1 SEE ALSO 45 46L<evp(7)>, 47L<EVP_DigestInit(3)> 48 49=head1 COPYRIGHT 50 51Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved. 52Copyright 2017 Ribose Inc. All Rights Reserved. 53 54Licensed under the Apache License 2.0 (the "License"). You may not use 55this file except in compliance with the License. You can obtain a copy 56in the file LICENSE in the source distribution or at 57L<https://www.openssl.org/source/license.html>. 58 59=cut 60 61