#include <openssl/rc4.h>
+Deprecated since OpenSSL 3.0, can be hidden entirely by defining
+B<OPENSSL_API_COMPAT> with a suitable version value, see
+L<openssl_user_macros(7)>:
+
void RC4_set_key(RC4_KEY *key, int len, const unsigned char *data);
void RC4(RC4_KEY *key, unsigned long len, const unsigned char *indata,
=head1 DESCRIPTION
+All of the functions described on this page are deprecated. Applications should
+instead use L<EVP_EncryptInit_ex(3)>, L<EVP_EncryptUpdate(3)> and
+L<EVP_EncryptFinal_ex(3)> or the equivalently named decrypt functions.
+
This library implements the Alleged RC4 cipher, which is described for
example in I<Applied Cryptography>. It is believed to be compatible
with RC4[TM], a proprietary cipher of RSA Security Inc.
L<EVP_EncryptInit(3)>
+=head1 HISTORY
+
+All of these functions were deprecated in OpenSSL 3.0.
+
=head1 COPYRIGHT
Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.