Edit File: dsaparam.1
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" openssl\-dsaparam, dsaparam \- DSA parameter manipulation and generation .SH "SYNOPSIS" .IX Header "SYNOPSIS" \&\fBopenssl dsaparam\fR [\fB\-help\fR] [\fB\-inform DER|PEM\fR] [\fB\-outform DER|PEM\fR] [\fB\-in filename\fR] [\fB\-out filename\fR] [\fB\-noout\fR] [\fB\-text\fR] [\fB\-C\fR] [\fB\-rand file...\fR] [\fB\-writerand file\fR] [\fB\-genkey\fR] [\fB\-engine id\fR] [\fBnumbits\fR] .SH "DESCRIPTION" .IX Header "DESCRIPTION" This command is used to manipulate or generate \s-1DSA\s0 parameter files. .SH "OPTIONS" .IX Header "OPTIONS" .IP "\fB\-help\fR" 4 .IX Item "-help" Print out a usage message. .IP "\fB\-inform DER|PEM\fR" 4 .IX Item "-inform DER|PEM" This specifies the input format. The \fB\s-1DER\s0\fR option uses an \s-1ASN1 DER\s0 encoded form compatible with \s-1RFC2459\s0 (\s-1PKIX\s0) DSS-Parms that is a \s-1SEQUENCE\s0 consisting of p, q and g respectively. The \s-1PEM\s0 form is the default format: it consists of the \fB\s-1DER\s0\fR format base64 encoded with additional header and footer lines. .IP "\fB\-outform DER|PEM\fR" 4 .IX Item "-outform DER|PEM" This specifies the output format, the options have the same meaning and default as the \fB\-inform\fR option. .IP "\fB\-in filename\fR" 4 .IX Item "-in filename" This specifies the input filename to read parameters from or standard input if this option is not specified. If the \fBnumbits\fR parameter is included then this option will be ignored. .IP "\fB\-out filename\fR" 4 .IX Item "-out filename" This specifies the output filename parameters to. Standard output is used if this option is not present. The output filename should \fBnot\fR be the same as the input filename. .IP "\fB\-noout\fR" 4 .IX Item "-noout" This option inhibits the output of the encoded version of the parameters. .IP "\fB\-text\fR" 4 .IX Item "-text" This option prints out the \s-1DSA\s0 parameters in human readable form. .IP "\fB\-C\fR" 4 .IX Item "-C" This option converts the parameters into C code. The parameters can then be loaded by calling the \fBget_dsaXXX()\fR function. .IP "\fB\-genkey\fR" 4 .IX Item "-genkey" This option will generate a \s-1DSA\s0 either using the specified or generated parameters. .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 "\fBnumbits\fR" 4 .IX Item "numbits" This option specifies that a parameter set should be generated of size \&\fBnumbits\fR. It must be the last option. If this option is included then the input file (if any) is ignored. .IP "\fB\-engine id\fR" 4 .IX Item "-engine id" Specifying an engine (by its unique \fBid\fR string) will cause \fBdsaparam\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. .SH "NOTES" .IX Header "NOTES" \&\s-1PEM\s0 format \s-1DSA\s0 parameters use the header and footer lines: .PP .Vb 2 \& \-\-\-\-\-BEGIN DSA PARAMETERS\-\-\-\-\- \& \-\-\-\-\-END DSA PARAMETERS\-\-\-\-\- .Ve .PP \&\s-1DSA\s0 parameter generation is a slow process and as a result the same set of \&\s-1DSA\s0 parameters is often used to generate several distinct keys. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBgendsa\fR\|(1), \fBdsa\fR\|(1), \fBgenrsa\fR\|(1), \&\fBrsa\fR\|(1) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2000\-2017 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>.