openssl-dsaparam(1), dsaparam(1) - DSA parameter manipulation and generation



  • DSAPARAM(1)			    OpenSSL			   DSAPARAM(1)
    
    
    
    NAME
           openssl-dsaparam, dsaparam - DSA parameter manipulation and generation
    
    SYNOPSIS
           openssl dsaparam [-help] [-inform DER|PEM] [-outform DER|PEM] [-in
           filename] [-out filename] [-noout] [-text] [-C] [-rand file...]
           [-writerand file] [-genkey] [-engine id] [numbits]
    
    DESCRIPTION
           This command is used to manipulate or generate DSA parameter files.
    
    OPTIONS
           -help
    	   Print out a usage message.
    
           -inform DER|PEM
    	   This specifies the input format. The DER option uses an ASN1 DER
    	   encoded form compatible with RFC2459 (PKIX) DSS-Parms that is a
    	   SEQUENCE consisting of p, q and g respectively. The PEM form is the
    	   default format: it consists of the DER format base64 encoded with
    	   additional header and footer lines.
    
           -outform DER|PEM
    	   This specifies the output format, the options have the same meaning
    	   and default as the -inform option.
    
           -in filename
    	   This specifies the input filename to read parameters from or
    	   standard input if this option is not specified. If the numbits
    	   parameter is included then this option will be ignored.
    
           -out filename
    	   This specifies the output filename parameters to. Standard output
    	   is used if this option is not present. The output filename should
    	   not be the same as the input filename.
    
           -noout
    	   This option inhibits the output of the encoded version of the
    	   parameters.
    
           -text
    	   This option prints out the DSA parameters in human readable form.
    
           -C  This option converts the parameters into C code. The parameters can
    	   then be loaded by calling the get_dsaXXX() function.
    
           -genkey
    	   This option will generate a DSA either using the specified or
    	   generated parameters.
    
           -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 ; for MS-Windows, , for
    	   OpenVMS, and : for all others.
    
           [-writerand file]
    	   Writes random data to the specified file upon exit.	This can be
    	   used with a subsequent -rand flag.
    
           numbits
    	   This option specifies that a parameter set should be generated of
    	   size numbits. It must be the last option. If this option is
    	   included then the input file (if any) is ignored.
    
           -engine id
    	   Specifying an engine (by its unique id string) will cause dsaparam
    	   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.
    
    NOTES
           PEM format DSA parameters use the header and footer lines:
    
    	-----BEGIN DSA PARAMETERS-----
    	-----END DSA PARAMETERS-----
    
           DSA parameter generation is a slow process and as a result the same set
           of DSA parameters is often used to generate several distinct keys.
    
    SEE ALSO
           gendsa(1), dsa(1), genrsa(1), rsa(1)
    
    COPYRIGHT
           Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
    
           Licensed under the OpenSSL license (the "License").  You may not use
           this file except in compliance with the License.	 You can obtain a copy
           in the file LICENSE in the source distribution or at
           <https://www.openssl.org/source/license.html>.
    
    
    
    1.1.1				  2018-09-11			   DSAPARAM(1)
    

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