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.\"
.IX Title "GENDSA 1"
.TH GENDSA 1 "2021-02-16" "1.1.1j" "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"
openssl\-gendsa, gendsa \- generate a DSA private key from a set of parameters
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBopenssl\fR \fBgendsa\fR
[\fB\-help\fR]
[\fB\-out filename\fR]
[\fB\-aes128\fR]
[\fB\-aes192\fR]
[\fB\-aes256\fR]
[\fB\-aria128\fR]
[\fB\-aria192\fR]
[\fB\-aria256\fR]
[\fB\-camellia128\fR]
[\fB\-camellia192\fR]
[\fB\-camellia256\fR]
[\fB\-des\fR]
[\fB\-des3\fR]
[\fB\-idea\fR]
[\fB\-rand file...\fR]
[\fB\-writerand file\fR]
[\fB\-engine id\fR]
[\fBparamfile\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBgendsa\fR command generates a \s-1DSA\s0 private key from a \s-1DSA\s0 parameter file
(which will be typically generated by the \fBopenssl dsaparam\fR command).
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-help\fR" 4
.IX Item "-help"
Print out a usage message.
.IP "\fB\-out filename\fR" 4
.IX Item "-out filename"
Output the key to the specified file. If this argument is not specified then
standard output is used.
.IP "\fB\-aes128\fR, \fB\-aes192\fR, \fB\-aes256\fR, \fB\-aria128\fR, \fB\-aria192\fR, \fB\-aria256\fR, \fB\-camellia128\fR, \fB\-camellia192\fR, \fB\-camellia256\fR, \fB\-des\fR, \fB\-des3\fR, \fB\-idea\fR" 4
.IX Item "-aes128, -aes192, -aes256, -aria128, -aria192, -aria256, -camellia128, -camellia192, -camellia256, -des, -des3, -idea"
These options encrypt the private key with specified
cipher before outputting it. A pass phrase is prompted for.
If none of these options is specified no encryption is used.
.IP "\fB\-rand file...\fR" 4
.IX Item "-rand file..."
A file or files containing random data used to seed the random number
generator.
Multiple files can be specified separated by an OS-dependent character.
The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
all others.
.IP "[\fB\-writerand file\fR]" 4
.IX Item "[-writerand file]"
Writes random data to the specified \fIfile\fR upon exit.
This can be used with a subsequent \fB\-rand\fR flag.
.IP "\fB\-engine id\fR" 4
.IX Item "-engine id"
Specifying an engine (by its unique \fBid\fR string) will cause \fBgendsa\fR
to attempt to obtain a functional reference to the specified engine,
thus initialising it if needed. The engine will then be set as the default
for all available algorithms.
.IP "\fBparamfile\fR" 4
.IX Item "paramfile"
This option specifies the \s-1DSA\s0 parameter file to use. The parameters in this
file determine the size of the private key. \s-1DSA\s0 parameters can be generated
and examined using the \fBopenssl dsaparam\fR command.
.SH "NOTES"
.IX Header "NOTES"
\&\s-1DSA\s0 key generation is little more than random number generation so it is
much quicker that \s-1RSA\s0 key generation for example.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBdsaparam\fR\|(1), \fBdsa\fR\|(1), \fBgenrsa\fR\|(1),
\&\fBrsa\fR\|(1)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-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>.
