| =pod |
| |
| =head1 NAME |
| |
| EVP_rc5_32_12_16_cbc, |
| EVP_rc5_32_12_16_cfb, |
| EVP_rc5_32_12_16_cfb64, |
| EVP_rc5_32_12_16_ecb, |
| EVP_rc5_32_12_16_ofb |
| - EVP RC5 cipher |
| |
| =head1 SYNOPSIS |
| |
| #include <openssl/evp.h> |
| |
| const EVP_CIPHER *EVP_rc5_32_12_16_cbc(void); |
| const EVP_CIPHER *EVP_rc5_32_12_16_cfb(void); |
| const EVP_CIPHER *EVP_rc5_32_12_16_cfb64(void); |
| const EVP_CIPHER *EVP_rc5_32_12_16_ecb(void); |
| const EVP_CIPHER *EVP_rc5_32_12_16_ofb(void); |
| |
| =head1 DESCRIPTION |
| |
| The RC5 encryption algorithm for EVP. |
| |
| =over 4 |
| |
| =item EVP_rc5_32_12_16_cbc(), |
| EVP_rc5_32_12_16_cfb(), |
| EVP_rc5_32_12_16_cfb64(), |
| EVP_rc5_32_12_16_ecb(), |
| EVP_rc5_32_12_16_ofb() |
| |
| RC5 encryption algorithm in CBC, CFB, ECB and OFB modes respectively. This is a |
| variable key length cipher with an additional "number of rounds" parameter. By |
| default the key length is set to 128 bits and 12 rounds. Alternative key lengths |
| can be set using L<EVP_CIPHER_CTX_set_key_length(3)>. The maximum key length is |
| 2040 bits. |
| |
| The following rc5 specific I<ctrl>s are supported (see |
| L<EVP_CIPHER_CTX_ctrl(3)>). |
| |
| =over 4 |
| |
| =item EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_SET_RC5_ROUNDS, rounds, NULL) |
| |
| Sets the number of rounds to B<rounds>. This must be one of RC5_8_ROUNDS, |
| RC5_12_ROUNDS or RC5_16_ROUNDS. |
| |
| =item EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GET_RC5_ROUNDS, 0, &rounds) |
| |
| Stores the number of rounds currently configured in B<*rounds> where B<*rounds> |
| is an int. |
| |
| =back |
| |
| =back |
| |
| =head1 RETURN VALUES |
| |
| These functions return an B<EVP_CIPHER> structure that contains the |
| implementation of the symmetric cipher. See L<EVP_CIPHER_meth_new(3)> for |
| details of the B<EVP_CIPHER> structure. |
| |
| |
| =head1 SEE ALSO |
| |
| L<evp(7)>, |
| L<EVP_EncryptInit(3)>, |
| L<EVP_CIPHER_meth_new(3)> |
| |
| =head1 COPYRIGHT |
| |
| Copyright 2017-2020 The OpenSSL Project Authors. All Rights Reserved. |
| |
| Licensed under the Apache License 2.0 (the "License"). You may not use |
| this file except in compliance with the License. You can obtain a copy |
| in the file LICENSE in the source distribution or at |
| L<https://www.openssl.org/source/license.html>. |
| |
| =cut |
