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136 .TH GENDSA 1 "2020-12-08" "1.1.1i" "OpenSSL"
137 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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142 openssl\-gendsa, gendsa \- generate a DSA private key from a set of parameters
144 .IX Header "SYNOPSIS"
145 \&\fBopenssl\fR \fBgendsa\fR
147 [\fB\-out filename\fR]
154 [\fB\-camellia128\fR]
155 [\fB\-camellia192\fR]
156 [\fB\-camellia256\fR]
160 [\fB\-rand file...\fR]
161 [\fB\-writerand file\fR]
165 .IX Header "DESCRIPTION"
166 The \fBgendsa\fR command generates a \s-1DSA\s0 private key from a \s-1DSA\s0 parameter file
167 (which will be typically generated by the \fBopenssl dsaparam\fR command).
172 Print out a usage message.
173 .IP "\fB\-out filename\fR" 4
174 .IX Item "-out filename"
175 Output the key to the specified file. If this argument is not specified then
176 standard output is used.
177 .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
178 .IX Item "-aes128, -aes192, -aes256, -aria128, -aria192, -aria256, -camellia128, -camellia192, -camellia256, -des, -des3, -idea"
179 These options encrypt the private key with specified
180 cipher before outputting it. A pass phrase is prompted for.
181 If none of these options is specified no encryption is used.
182 .IP "\fB\-rand file...\fR" 4
183 .IX Item "-rand file..."
184 A file or files containing random data used to seed the random number
186 Multiple files can be specified separated by an OS-dependent character.
187 The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
189 .IP "[\fB\-writerand file\fR]" 4
190 .IX Item "[-writerand file]"
191 Writes random data to the specified \fIfile\fR upon exit.
192 This can be used with a subsequent \fB\-rand\fR flag.
193 .IP "\fB\-engine id\fR" 4
194 .IX Item "-engine id"
195 Specifying an engine (by its unique \fBid\fR string) will cause \fBgendsa\fR
196 to attempt to obtain a functional reference to the specified engine,
197 thus initialising it if needed. The engine will then be set as the default
198 for all available algorithms.
199 .IP "\fBparamfile\fR" 4
201 This option specifies the \s-1DSA\s0 parameter file to use. The parameters in this
202 file determine the size of the private key. \s-1DSA\s0 parameters can be generated
203 and examined using the \fBopenssl dsaparam\fR command.
206 \&\s-1DSA\s0 key generation is little more than random number generation so it is
207 much quicker that \s-1RSA\s0 key generation for example.
209 .IX Header "SEE ALSO"
210 \&\fBdsaparam\fR\|(1), \fBdsa\fR\|(1), \fBgenrsa\fR\|(1),
213 .IX Header "COPYRIGHT"
214 Copyright 2000\-2018 The OpenSSL Project Authors. All Rights Reserved.
216 Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
217 this file except in compliance with the License. You can obtain a copy
218 in the file \s-1LICENSE\s0 in the source distribution or at
219 <https://www.openssl.org/source/license.html>.