1=pod 2 3=head1 NAME 4 5EVP_rc2_cbc, 6EVP_rc2_cfb, 7EVP_rc2_cfb64, 8EVP_rc2_ecb, 9EVP_rc2_ofb, 10EVP_rc2_40_cbc, 11EVP_rc2_64_cbc 12- EVP RC2 cipher 13 14=head1 SYNOPSIS 15 16 #include <openssl/evp.h> 17 18 const EVP_CIPHER *EVP_rc2_cbc(void); 19 const EVP_CIPHER *EVP_rc2_cfb(void); 20 const EVP_CIPHER *EVP_rc2_cfb64(void); 21 const EVP_CIPHER *EVP_rc2_ecb(void); 22 const EVP_CIPHER *EVP_rc2_ofb(void); 23 const EVP_CIPHER *EVP_rc2_40_cbc(void); 24 const EVP_CIPHER *EVP_rc2_64_cbc(void); 25 26=head1 DESCRIPTION 27 28The RC2 encryption algorithm for EVP. 29 30=over 4 31 32=item EVP_rc2_cbc(), 33EVP_rc2_cfb(), 34EVP_rc2_cfb64(), 35EVP_rc2_ecb(), 36EVP_rc2_ofb() 37 38RC2 encryption algorithm in CBC, CFB, ECB and OFB modes respectively. This is a 39variable key length cipher with an additional parameter called "effective key 40bits" or "effective key length". By default both are set to 128 bits. 41 42=item EVP_rc2_40_cbc(), 43EVP_rc2_64_cbc() 44 45RC2 algorithm in CBC mode with a default key length and effective key length of 4640 and 64 bits. 47 48WARNING: these functions are obsolete. Their usage should be replaced with the 49EVP_rc2_cbc(), EVP_CIPHER_CTX_set_key_length() and EVP_CIPHER_CTX_ctrl() 50functions to set the key length and effective key length. 51 52=back 53 54=head1 NOTES 55 56Developers should be aware of the negative performance implications of 57calling these functions multiple times and should consider using 58L<EVP_CIPHER_fetch(3)> with L<EVP_CIPHER-RC2(7)> instead. 59See L<crypto(7)/Performance> for further information. 60 61=head1 RETURN VALUES 62 63These functions return an B<EVP_CIPHER> structure that contains the 64implementation of the symmetric cipher. See L<EVP_CIPHER_meth_new(3)> for 65details of the B<EVP_CIPHER> structure. 66 67=head1 SEE ALSO 68 69L<evp(7)>, 70L<EVP_EncryptInit(3)>, 71L<EVP_CIPHER_meth_new(3)> 72 73=head1 COPYRIGHT 74 75Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved. 76 77Licensed under the Apache License 2.0 (the "License"). You may not use 78this file except in compliance with the License. You can obtain a copy 79in the file LICENSE in the source distribution or at 80L<https://www.openssl.org/source/license.html>. 81 82=cut 83 84