1=pod 2 3=head1 NAME 4 5EVP_sm4_cbc, 6EVP_sm4_ecb, 7EVP_sm4_cfb, 8EVP_sm4_ofb, 9EVP_sm4_ctr 10- EVP SM4 cipher 11 12=head1 SYNOPSIS 13 14 #include <openssl/evp.h> 15 16 const EVP_CIPHER *EVP_sm4_cbc(void); 17 const EVP_CIPHER *EVP_sm4_ecb(void); 18 const EVP_CIPHER *EVP_sm4_cfb(void); 19 const EVP_CIPHER *EVP_sm4_ofb(void); 20 const EVP_CIPHER *EVP_sm4_ctr(void); 21 22=head1 DESCRIPTION 23 24The SM4 blockcipher (GB/T 32907-2016) for EVP. 25 26All modes below use a key length of 128 bits and acts on blocks of 128 bits. 27 28=over 4 29 30=item EVP_sm4_cbc(), 31EVP_sm4_ecb(), 32EVP_sm4_cfb(), 33EVP_sm4_ofb(), 34EVP_sm4_ctr() 35 36The SM4 blockcipher with a 128-bit key in CBC, ECB, CFB, OFB and CTR modes 37respectively. 38 39=back 40 41=head1 RETURN VALUES 42 43These functions return a B<EVP_CIPHER> structure that contains the 44implementation of the symmetric cipher. See L<EVP_CIPHER_meth_new(3)> for 45details of the B<EVP_CIPHER> structure. 46 47=head1 SEE ALSO 48 49L<evp(7)>, 50L<EVP_EncryptInit(3)>, 51L<EVP_CIPHER_meth_new(3)> 52 53=head1 COPYRIGHT 54 55Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved. 56Copyright 2017 Ribose Inc. All Rights Reserved. 57 58Licensed under the OpenSSL license (the "License"). You may not use 59this file except in compliance with the License. You can obtain a copy 60in the file LICENSE in the source distribution or at 61L<https://www.openssl.org/source/license.html>. 62 63=cut 64 65