Android_verify/lib/openssl/share/man/man3/EVP_rc2_cbc.3ossl

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.IX Title "EVP_RC2_CBC 3ossl"
.TH EVP_RC2_CBC 3ossl 2025-01-17 3.4.0 OpenSSL
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.\" way too many mistakes in technical documents.
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.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 RC2 encryption algorithm for EVP.
.IP "\fBEVP_rc2_cbc()\fR, \fBEVP_rc2_cfb()\fR, \fBEVP_rc2_cfb64()\fR, \fBEVP_rc2_ecb()\fR, \fBEVP_rc2_ofb()\fR" 4
.IX Item "EVP_rc2_cbc(), EVP_rc2_cfb(), EVP_rc2_cfb64(), EVP_rc2_ecb(), EVP_rc2_ofb()"
RC2 encryption algorithm in CBC, CFB, ECB and OFB modes respectively. This is a
variable key length cipher with an additional parameter called "effective key
bits" or "effective key length". By default both are set to 128 bits.
.IP "\fBEVP_rc2_40_cbc()\fR, \fBEVP_rc2_64_cbc()\fR" 4
.IX Item "EVP_rc2_40_cbc(), EVP_rc2_64_cbc()"
RC2 algorithm in CBC mode with a default key length and effective key length of
40 and 64 bits.
.Sp
WARNING: these functions are obsolete. Their usage should be replaced with the
\&\fBEVP_rc2_cbc()\fR, \fBEVP_CIPHER_CTX_set_key_length()\fR and \fBEVP_CIPHER_CTX_ctrl()\fR
functions to set the key length and effective key length.
.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\-RC2\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>.