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

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.\" ========================================================================
.\"
.IX Title "EVP_CIPHER-NULL 7ossl"
.TH EVP_CIPHER-NULL 7ossl "2024-09-03" "3.3.2" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
EVP_CIPHER\-NULL \- The NULL EVP_CIPHER implementation
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Support for a \s-1NULL\s0 symmetric encryption using the \fB\s-1EVP_CIPHER\s0\fR \s-1API.\s0
This is used when the \s-1TLS\s0 cipher suite is \s-1TLS_NULL_WITH_NULL_NULL.\s0
This does no encryption (just copies the data) and has a mac size of zero.
.SS "Algorithm Name"
.IX Subsection "Algorithm Name"
The following algorithm is available in the default provider:
.ie n .IP """\s-1NULL""\s0" 4
.el .IP "``\s-1NULL''\s0" 4
.IX Item "NULL"
.SS "Parameters"
.IX Subsection "Parameters"
This implementation supports the following parameters:
.PP
\fIGettable \s-1EVP_CIPHER\s0 parameters\fR
.IX Subsection "Gettable EVP_CIPHER parameters"
.PP
See \*(L"Gettable \s-1EVP_CIPHER\s0 parameters\*(R" in \fBEVP_EncryptInit\fR\|(3)
.PP
\fIGettable \s-1EVP_CIPHER_CTX\s0 parameters\fR
.IX Subsection "Gettable EVP_CIPHER_CTX parameters"
.ie n .IP """keylen"" (\fB\s-1OSSL_CIPHER_PARAM_KEYLEN\s0\fR) <unsigned integer>" 4
.el .IP "``keylen'' (\fB\s-1OSSL_CIPHER_PARAM_KEYLEN\s0\fR) <unsigned integer>" 4
.IX Item "keylen (OSSL_CIPHER_PARAM_KEYLEN) <unsigned integer>"
.PD 0
.ie n .IP """ivlen"" (\fB\s-1OSSL_CIPHER_PARAM_IVLEN\s0\fR and <\fB\s-1OSSL_CIPHER_PARAM_AEAD_IVLEN\s0\fR) <unsigned integer>" 4
.el .IP "``ivlen'' (\fB\s-1OSSL_CIPHER_PARAM_IVLEN\s0\fR and <\fB\s-1OSSL_CIPHER_PARAM_AEAD_IVLEN\s0\fR) <unsigned integer>" 4
.IX Item "ivlen (OSSL_CIPHER_PARAM_IVLEN and <OSSL_CIPHER_PARAM_AEAD_IVLEN) <unsigned integer>"
.ie n .IP """tls-mac"" (\fB\s-1OSSL_CIPHER_PARAM_TLS_MAC\s0\fR) <octet ptr>" 4
.el .IP "``tls-mac'' (\fB\s-1OSSL_CIPHER_PARAM_TLS_MAC\s0\fR) <octet ptr>" 4
.IX Item "tls-mac (OSSL_CIPHER_PARAM_TLS_MAC) <octet ptr>"
.PD
.PP
See \*(L"\s-1PARAMETERS\*(R"\s0 in \fBEVP_EncryptInit\fR\|(3) for further information.
.PP
\fISettable \s-1EVP_CIPHER_CTX\s0 parameters\fR
.IX Subsection "Settable EVP_CIPHER_CTX parameters"
.ie n .IP """tls-mac-size"" (\fB\s-1OSSL_CIPHER_PARAM_TLS_MAC_SIZE\s0\fR) <unsigned integer>" 4
.el .IP "``tls-mac-size'' (\fB\s-1OSSL_CIPHER_PARAM_TLS_MAC_SIZE\s0\fR) <unsigned integer>" 4
.IX Item "tls-mac-size (OSSL_CIPHER_PARAM_TLS_MAC_SIZE) <unsigned integer>"
.PP
See \*(L"\s-1PARAMETERS\*(R"\s0 in \fBEVP_EncryptInit\fR\|(3) for further information.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
\&\s-1RFC 5246\s0 section\-6.2.3.1
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBprovider\-cipher\fR\|(7), \fBOSSL_PROVIDER\-default\fR\|(7)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2023 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>.