2019-03-11 19:18:04 +00:00
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=pod
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=head1 NAME
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EVP_rc5_32_12_16_cbc,
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EVP_rc5_32_12_16_cfb,
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EVP_rc5_32_12_16_cfb64,
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EVP_rc5_32_12_16_ecb,
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EVP_rc5_32_12_16_ofb
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- EVP RC5 cipher
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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const EVP_CIPHER *EVP_rc5_32_12_16_cbc(void)
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const EVP_CIPHER *EVP_rc5_32_12_16_cfb(void)
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const EVP_CIPHER *EVP_rc5_32_12_16_cfb64(void)
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const EVP_CIPHER *EVP_rc5_32_12_16_ecb(void)
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const EVP_CIPHER *EVP_rc5_32_12_16_ofb(void)
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=head1 DESCRIPTION
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The RC5 encryption algorithm for EVP.
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=over 4
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=item EVP_rc5_32_12_16_cbc(),
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EVP_rc5_32_12_16_cfb(),
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EVP_rc5_32_12_16_cfb64(),
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EVP_rc5_32_12_16_ecb(),
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EVP_rc5_32_12_16_ofb()
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RC5 encryption algorithm in CBC, CFB, ECB and OFB modes respectively. This is a
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variable key length cipher with an additional "number of rounds" parameter. By
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2019-12-19 16:23:54 +00:00
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default the key length is set to 128 bits and 12 rounds. Alternative key lengths
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can be set using L<EVP_CIPHER_CTX_set_key_length(3)>. The maximum key length is
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2040 bits.
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The following rc5 specific I<ctrl>s are supported (see
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L<EVP_CIPHER_CTX_ctrl(3)>).
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=over 4
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=item EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_SET_RC5_ROUNDS, rounds, NULL)
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Sets the number of rounds to B<rounds>. This must be one of RC5_8_ROUNDS,
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RC5_12_ROUNDS or RC5_16_ROUNDS.
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=item EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GET_RC5_ROUNDS, 0, &rounds)
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Stores the number of rounds currently configured in B<*rounds> where B<*rounds>
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is an int.
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=back
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2019-03-11 19:18:04 +00:00
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=back
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=head1 RETURN VALUES
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These functions return an B<EVP_CIPHER> structure that contains the
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implementation of the symmetric cipher. See L<EVP_CIPHER_meth_new(3)> for
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details of the B<EVP_CIPHER> structure.
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=head1 SEE ALSO
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L<evp(7)>,
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L<EVP_EncryptInit(3)>,
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L<EVP_CIPHER_meth_new(3)>
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=head1 COPYRIGHT
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2019-12-19 16:23:54 +00:00
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Copyright 2017-2019 The OpenSSL Project Authors. All Rights Reserved.
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2019-03-11 19:18:04 +00:00
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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