✏ 编辑: EVP_rc2_cfb.3

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.\"
.IX Title "EVP_RC2_CBC 3"
.TH EVP_RC2_CBC 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
EVP_rc2_cbc, EVP_rc2_cfb, EVP_rc2_cfb64, EVP_rc2_ecb, EVP_rc2_ofb, EVP_rc2_40_cbc, EVP_rc2_64_cbc \&\- EVP RC2 cipher
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& const EVP_CIPHER *EVP_rc2_cbc(void)
\& const EVP_CIPHER *EVP_rc2_cfb(void)
\& const EVP_CIPHER *EVP_rc2_cfb64(void)
\& const EVP_CIPHER *EVP_rc2_ecb(void)
\& const EVP_CIPHER *EVP_rc2_ofb(void)
\& const EVP_CIPHER *EVP_rc2_40_cbc(void)
\& const EVP_CIPHER *EVP_rc2_64_cbc(void)
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \s-1RC2\s0 encryption algorithm for \s-1EVP.\s0
.IP "\fIEVP_rc2_cbc()\fR, \fIEVP_rc2_cfb()\fR, \fIEVP_rc2_cfb64()\fR, \fIEVP_rc2_ecb()\fR, \fIEVP_rc2_ofb()\fR" 4
.IX Item "EVP_rc2_cbc(), EVP_rc2_cfb(), EVP_rc2_cfb64(), EVP_rc2_ecb(), EVP_rc2_ofb()"
\&\s-1RC2\s0 encryption algorithm in \s-1CBC, CFB, ECB\s0 and \s-1OFB\s0 modes respectively. This is a
variable key length cipher with an additional parameter called \*(L"effective key
bits\*(R" or \*(L"effective key length\*(R". By default both are set to 128 bits.
.IP "\fIEVP_rc2_40_cbc()\fR, \fIEVP_rc2_64_cbc()\fR" 4
.IX Item "EVP_rc2_40_cbc(), EVP_rc2_64_cbc()"
\&\s-1RC2\s0 algorithm in \s-1CBC\s0 mode with a default key length and effective key length of
40 and 64 bits.
.Sp
\&\s-1WARNING:\s0 these functions are obsolete. Their usage should be replaced with the
\&\fIEVP_rc2_cbc()\fR, \fIEVP_CIPHER_CTX_set_key_length()\fR and \fIEVP_CIPHER_CTX_ctrl()\fR
functions to set the key length and effective key length.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
These functions return an \fB\s-1EVP_CIPHER\s0\fR structure that contains the
implementation of the symmetric cipher. See \fIEVP_CIPHER_meth_new\fR\|(3) for
details of the \fB\s-1EVP_CIPHER\s0\fR structure.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIevp\fR\|(7),
\&\fIEVP_EncryptInit\fR\|(3),
\&\fIEVP_CIPHER_meth_new\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2017\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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