Android_verify/third_party/android-libs/share/man/man7/EVP_CIPHER-SM4.7ossl

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.IX Title "EVP_CIPHER-SM4 7ossl"
.TH EVP_CIPHER-SM4 7ossl "2024-09-03" "3.3.2" "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_CIPHER\-SM4 \- The SM4 EVP_CIPHER implementations
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Support for \s-1SM4\s0 symmetric encryption using the \fB\s-1EVP_CIPHER\s0\fR \s-1API.\s0
.SS "Algorithm Names"
.IX Subsection "Algorithm Names"
The following algorithms are available in the default provider:
.ie n .IP """\s-1SM4\-CBC:SM4""\s0" 4
.el .IP "``\s-1SM4\-CBC:SM4''\s0" 4
.IX Item "SM4-CBC:SM4"
.PD 0
.ie n .IP """\s-1SM4\-ECB""\s0" 4
.el .IP "``\s-1SM4\-ECB''\s0" 4
.IX Item "SM4-ECB"
.ie n .IP """\s-1SM4\-CTR""\s0" 4
.el .IP "``\s-1SM4\-CTR''\s0" 4
.IX Item "SM4-CTR"
.ie n .IP """\s-1SM4\-OFB""\s0 or ""\s-1SM4\-OFB128""\s0" 4
.el .IP "``\s-1SM4\-OFB''\s0 or ``\s-1SM4\-OFB128''\s0" 4
.IX Item "SM4-OFB or SM4-OFB128"
.ie n .IP """\s-1SM4\-CFB""\s0 or ""\s-1SM4\-CFB128""\s0" 4
.el .IP "``\s-1SM4\-CFB''\s0 or ``\s-1SM4\-CFB128''\s0" 4
.IX Item "SM4-CFB or SM4-CFB128"
.ie n .IP """\s-1SM4\-GCM""\s0" 4
.el .IP "``\s-1SM4\-GCM''\s0" 4
.IX Item "SM4-GCM"
.ie n .IP """\s-1SM4\-CCM""\s0" 4
.el .IP "``\s-1SM4\-CCM''\s0" 4
.IX Item "SM4-CCM"
.ie n .IP """\s-1SM4\-XTS""\s0" 4
.el .IP "``\s-1SM4\-XTS''\s0" 4
.IX Item "SM4-XTS"
.PD
.SS "Parameters"
.IX Subsection "Parameters"
This implementation supports the parameters described in
\&\*(L"\s-1PARAMETERS\*(R"\s0 in \fBEVP_EncryptInit\fR\|(3).
.SH "NOTES"
.IX Header "NOTES"
The \s-1SM4\-XTS\s0 implementation allows streaming to be performed, but each
\&\fBEVP_EncryptUpdate\fR\|(3) or \fBEVP_DecryptUpdate\fR\|(3) call requires each input
to be a multiple of the blocksize. Only the final \fBEVP_EncryptUpdate()\fR or
\&\fBEVP_DecryptUpdate()\fR call can optionally have an input that is not a multiple
of the blocksize but is larger than one block. In that case ciphertext
stealing (\s-1CTS\s0) is used to fill the block.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBprovider\-cipher\fR\|(7), \fBOSSL_PROVIDER\-default\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (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>.