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+.\" $NetBSD: EVP_rc4.3,v 1.5 2026/04/08 17:06:44 christos Exp $
+.\"
+.\" -*- mode: troff; coding: utf-8 -*-
+.\" Automatically generated by Pod::Man v6.0.2 (Pod::Simple 3.45)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
+.de Sp \" Vertical space (when we can't use .PP)
+.if t .sp .5v
+.if n .sp
+..
+.de Vb \" Begin verbatim text
+.ft CW
+.nf
+.ne \\$1
+..
+.de Ve \" End verbatim text
+.ft R
+.fi
+..
+.\" \*(C` and \*(C' are quotes in nroff, nothing in troff, for use with C<>.
+.ie n \{\
+. ds C` ""
+. ds C' ""
+'br\}
+.el\{\
+. ds C`
+. ds C'
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
+.de IX
+..
+.nr rF 0
+.if \n(.g .if rF .nr rF 1
+.if (\n(rF:(\n(.g==0)) \{\
+. if \nF \{\
+. de IX
+. tm Index:\\$1\t\\n%\t"\\$2"
+..
+. if !\nF==2 \{\
+. nr % 0
+. nr F 2
+. \}
+. \}
+.\}
+.rr rF
+.\"
+.\" Required to disable full justification in groff 1.23.0.
+.if n .ds AD l
+.\" ========================================================================
+.\"
+.IX Title "EVP_rc4 3"
+.TH EVP_rc4 3 2026-04-07 3.5.6 OpenSSL
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+EVP_rc4,
+EVP_rc4_40,
+EVP_rc4_hmac_md5
+\&\- EVP RC4 stream cipher
+.SH SYNOPSIS
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/evp.h>
+\&
+\& const EVP_CIPHER *EVP_rc4(void);
+\& const EVP_CIPHER *EVP_rc4_40(void);
+\& const EVP_CIPHER *EVP_rc4_hmac_md5(void);
+.Ve
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+The RC4 stream cipher for EVP.
+.IP \fBEVP_rc4()\fR 4
+.IX Item "EVP_rc4()"
+RC4 stream cipher. This is a variable key length cipher with a default key
+length of 128 bits.
+.IP \fBEVP_rc4_40()\fR 4
+.IX Item "EVP_rc4_40()"
+RC4 stream cipher with 40 bit key length.
+.Sp
+WARNING: this function is obsolete. Its usage should be replaced with the
+\&\fBEVP_rc4()\fR and the \fBEVP_CIPHER_CTX_set_key_length()\fR functions.
+.IP \fBEVP_rc4_hmac_md5()\fR 4
+.IX Item "EVP_rc4_hmac_md5()"
+Authenticated encryption with the RC4 stream cipher with MD5 as HMAC.
+.Sp
+WARNING: this is not intended for usage outside of TLS and requires calling of
+some undocumented ctrl functions. These ciphers do not conform to the EVP AEAD
+interface.
+.SH NOTES
+.IX Header "NOTES"
+Developers should be aware of the negative performance implications of
+calling these functions multiple times and should consider using
+\&\fBEVP_CIPHER_fetch\fR\|(3) with \fBEVP_CIPHER\-RC4\fR\|(7) instead.
+See "Performance" in \fBcrypto\fR\|(7) for further information.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+These functions return an \fBEVP_CIPHER\fR structure that contains the
+implementation of the symmetric cipher. See \fBEVP_CIPHER_meth_new\fR\|(3) for
+details of the \fBEVP_CIPHER\fR structure.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBevp\fR\|(7),
+\&\fBEVP_EncryptInit\fR\|(3),
+\&\fBEVP_CIPHER_meth_new\fR\|(3)
+.SH COPYRIGHT
+.IX Header "COPYRIGHT"
+Copyright 2017\-2023 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+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>.