75 lines
1.7 KiB
Plaintext
75 lines
1.7 KiB
Plaintext
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=pod
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=head1 NAME
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EVP_rc4,
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EVP_rc4_40,
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EVP_rc4_hmac_md5
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- EVP RC4 stream cipher
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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const EVP_CIPHER *EVP_rc4(void);
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const EVP_CIPHER *EVP_rc4_40(void);
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const EVP_CIPHER *EVP_rc4_hmac_md5(void);
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=head1 DESCRIPTION
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The RC4 stream cipher for EVP.
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=over 4
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=item EVP_rc4()
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RC4 stream cipher. This is a variable key length cipher with a default key
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length of 128 bits.
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=item EVP_rc4_40()
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RC4 stream cipher with 40 bit key length.
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WARNING: this function is obsolete. Its usage should be replaced with the
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EVP_rc4() and the EVP_CIPHER_CTX_set_key_length() functions.
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=item EVP_rc4_hmac_md5()
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Authenticated encryption with the RC4 stream cipher with MD5 as HMAC.
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WARNING: this is not intended for usage outside of TLS and requires calling of
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some undocumented ctrl functions. These ciphers do not conform to the EVP AEAD
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interface.
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=back
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=head1 NOTES
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Developers should be aware of the negative performance implications of
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calling these functions multiple times and should consider using
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L<EVP_CIPHER_fetch(3)> with L<EVP_CIPHER-RC4(7)> instead.
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See L<crypto(7)/Performance> for further information.
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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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Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (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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