DSAPARAM(1)			    OpenSSL			   DSAPARAM(1)



NAME
       dsaparam - DSA parameter manipulation and generation

SYNOPSIS
       openssl dsaparam [-inform DER|PEM] [-outform DER|PEM] [-in filename]
       [-out filename] [-noout] [-text] [-C] [-rand file(s)] [-genkey]
       [-engine id] [numbits]

DESCRIPTION
       This command is used to manipulate or generate DSA parameter files.

OPTIONS
       -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
	   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(s)
	   a file or files containing random data used to seed the random
	   number generator, or an EGD socket (see RAND_egd(3)).  Multiple
	   files can be specified separated by a OS-dependent character.  The
	   separator is ; for MS-Windows, , for OpenVMS, and : for all others.

       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)



1.0.2k				  2017-01-26			   DSAPARAM(1)