1=pod 2 3=head1 NAME 4 5EVP_seed_cbc, 6EVP_seed_cfb, 7EVP_seed_cfb128, 8EVP_seed_ecb, 9EVP_seed_ofb 10- EVP SEED cipher 11 12=head1 SYNOPSIS 13 14 #include <openssl/evp.h> 15 16 const EVP_CIPHER *EVP_seed_cbc(void); 17 const EVP_CIPHER *EVP_seed_cfb(void); 18 const EVP_CIPHER *EVP_seed_cfb128(void); 19 const EVP_CIPHER *EVP_seed_ecb(void); 20 const EVP_CIPHER *EVP_seed_ofb(void); 21 22=head1 DESCRIPTION 23 24The SEED encryption algorithm 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_seed_cbc(), 31EVP_seed_cfb(), 32EVP_seed_cfb128(), 33EVP_seed_ecb(), 34EVP_seed_ofb() 35 36The SEED encryption algorithm in CBC, CFB, ECB and OFB modes respectively. 37 38=back 39 40=head1 NOTES 41 42Developers should be aware of the negative performance implications of 43calling these functions multiple times and should consider using 44L<EVP_CIPHER_fetch(3)> with L<EVP_CIPHER-SEED(7)> instead. 45See L<crypto(7)/Performance> for further information. 46 47=head1 RETURN VALUES 48 49These functions return an B<EVP_CIPHER> structure that contains the 50implementation of the symmetric cipher. See L<EVP_CIPHER_meth_new(3)> for 51details of the B<EVP_CIPHER> structure. 52 53=head1 SEE ALSO 54 55L<evp(7)>, 56L<EVP_EncryptInit(3)>, 57L<EVP_CIPHER_meth_new(3)> 58 59=head1 COPYRIGHT 60 61Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved. 62 63Licensed under the Apache License 2.0 (the "License"). You may not use 64this file except in compliance with the License. You can obtain a copy 65in the file LICENSE in the source distribution or at 66L<https://www.openssl.org/source/license.html>. 67 68=cut 69