246 lines
7.8 KiB
Groff
246 lines
7.8 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "DSAPARAM 1"
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.TH DSAPARAM 1 "2021-03-25" "1.1.1k" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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openssl\-dsaparam, dsaparam \- DSA parameter manipulation and generation
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl dsaparam\fR
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[\fB\-help\fR]
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[\fB\-inform DER|PEM\fR]
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[\fB\-outform DER|PEM\fR]
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[\fB\-in filename\fR]
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[\fB\-out filename\fR]
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[\fB\-noout\fR]
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[\fB\-text\fR]
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[\fB\-C\fR]
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[\fB\-rand file...\fR]
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[\fB\-writerand file\fR]
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[\fB\-genkey\fR]
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[\fB\-engine id\fR]
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[\fBnumbits\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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This command is used to manipulate or generate \s-1DSA\s0 parameter files.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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.IP "\fB\-help\fR" 4
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.IX Item "-help"
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Print out a usage message.
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.IP "\fB\-inform DER|PEM\fR" 4
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.IX Item "-inform DER|PEM"
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This specifies the input format. The \fB\s-1DER\s0\fR option uses an \s-1ASN1 DER\s0 encoded
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form compatible with \s-1RFC2459\s0 (\s-1PKIX\s0) DSS-Parms that is a \s-1SEQUENCE\s0 consisting
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of p, q and g respectively. The \s-1PEM\s0 form is the default format: it consists
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of the \fB\s-1DER\s0\fR format base64 encoded with additional header and footer lines.
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.IP "\fB\-outform DER|PEM\fR" 4
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.IX Item "-outform DER|PEM"
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This specifies the output format, the options have the same meaning and default
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as the \fB\-inform\fR option.
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.IP "\fB\-in filename\fR" 4
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.IX Item "-in filename"
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This specifies the input filename to read parameters from or standard input if
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this option is not specified. If the \fBnumbits\fR parameter is included then
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this option will be ignored.
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.IP "\fB\-out filename\fR" 4
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.IX Item "-out filename"
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This specifies the output filename parameters to. Standard output is used
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if this option is not present. The output filename should \fBnot\fR be the same
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as the input filename.
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.IP "\fB\-noout\fR" 4
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.IX Item "-noout"
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This option inhibits the output of the encoded version of the parameters.
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.IP "\fB\-text\fR" 4
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.IX Item "-text"
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This option prints out the \s-1DSA\s0 parameters in human readable form.
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.IP "\fB\-C\fR" 4
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.IX Item "-C"
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This option converts the parameters into C code. The parameters can then
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be loaded by calling the \fBget_dsaXXX()\fR function.
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.IP "\fB\-genkey\fR" 4
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.IX Item "-genkey"
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This option will generate a \s-1DSA\s0 either using the specified or generated
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parameters.
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.IP "\fB\-rand file...\fR" 4
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.IX Item "-rand file..."
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A file or files containing random data used to seed the random number
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generator.
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Multiple files can be specified separated by an OS-dependent character.
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The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
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all others.
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.IP "[\fB\-writerand file\fR]" 4
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.IX Item "[-writerand file]"
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Writes random data to the specified \fIfile\fR upon exit.
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This can be used with a subsequent \fB\-rand\fR flag.
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.IP "\fBnumbits\fR" 4
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.IX Item "numbits"
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This option specifies that a parameter set should be generated of size
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\&\fBnumbits\fR. It must be the last option. If this option is included then
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the input file (if any) is ignored.
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.IP "\fB\-engine id\fR" 4
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.IX Item "-engine id"
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Specifying an engine (by its unique \fBid\fR string) will cause \fBdsaparam\fR
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to attempt to obtain a functional reference to the specified engine,
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thus initialising it if needed. The engine will then be set as the default
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for all available algorithms.
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.SH "NOTES"
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.IX Header "NOTES"
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\&\s-1PEM\s0 format \s-1DSA\s0 parameters use the header and footer lines:
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.PP
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.Vb 2
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\& \-\-\-\-\-BEGIN DSA PARAMETERS\-\-\-\-\-
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\& \-\-\-\-\-END DSA PARAMETERS\-\-\-\-\-
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.Ve
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.PP
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\&\s-1DSA\s0 parameter generation is a slow process and as a result the same set of
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\&\s-1DSA\s0 parameters is often used to generate several distinct keys.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fBgendsa\fR\|(1), \fBdsa\fR\|(1), \fBgenrsa\fR\|(1),
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\&\fBrsa\fR\|(1)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2000\-2017 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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