✏ 编辑: EVP_sm4_cfb128.3

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.\"
.IX Title "EVP_SM4_CBC 3"
.TH EVP_SM4_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_sm4_cbc, EVP_sm4_ecb, EVP_sm4_cfb, EVP_sm4_cfb128, EVP_sm4_ofb, EVP_sm4_ctr \&\- EVP SM4 cipher
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& const EVP_CIPHER *EVP_sm4_cbc(void);
\& const EVP_CIPHER *EVP_sm4_ecb(void);
\& const EVP_CIPHER *EVP_sm4_cfb(void);
\& const EVP_CIPHER *EVP_sm4_cfb128(void);
\& const EVP_CIPHER *EVP_sm4_ofb(void);
\& const EVP_CIPHER *EVP_sm4_ctr(void);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \s-1SM4\s0 blockcipher (\s-1GB/T 32907\-2016\s0) for \s-1EVP.\s0
.PP
All modes below use a key length of 128 bits and acts on blocks of 128 bits.
.IP "\fIEVP_sm4_cbc()\fR, \fIEVP_sm4_ecb()\fR, \fIEVP_sm4_cfb()\fR, \fIEVP_sm4_cfb128()\fR, \fIEVP_sm4_ofb()\fR, \fIEVP_sm4_ctr()\fR" 4
.IX Item "EVP_sm4_cbc(), EVP_sm4_ecb(), EVP_sm4_cfb(), EVP_sm4_cfb128(), EVP_sm4_ofb(), EVP_sm4_ctr()"
The \s-1SM4\s0 blockcipher with a 128\-bit key in \s-1CBC, ECB, CFB, OFB\s0 and \s-1CTR\s0 modes
respectively.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
These functions return a \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.
Copyright 2017 Ribose Inc. 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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