EVP_RC5_32_12_16_CBC

Section: OpenSSL (3SSL)
Updated: 2024-03-03
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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

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);

DESCRIPTION

The RC5 encryption algorithm for EVP.

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 EVP_CIPHER_CTX_set_key_length(3). The maximum key length is 2040 bits.

The following rc5 specific ctrls are supported (see EVP_CIPHER_CTX_ctrl(3)).

EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_SET_RC5_ROUNDS, rounds, NULL): Sets the number of rounds to rounds. This must be one of RC5_8_ROUNDS, RC5_12_ROUNDS or RC5_16_ROUNDS.
EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GET_RC5_ROUNDS, 0, &rounds): Stores the number of rounds currently configured in *rounds where *rounds is an int.

NOTES

Developers should be aware of the negative performance implications of calling these functions multiple times and should consider using EVP_CIPHER_fetch(3) with EVP_CIPHER-RC5(7) instead. See ``Performance'' in crypto(7) for further information.

RETURN VALUES

These functions return an EVP_CIPHER structure that contains the implementation of the symmetric cipher. See EVP_CIPHER_meth_new(3) for details of the EVP_CIPHER structure.

COPYRIGHT

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 <https://www.openssl.org/source/license.html>.

This document was created by man2html, using the manual pages.
Time: 05:14:25 GMT, April 16, 2024