/xlv3/openssl/0.9.7e-sgipl1/work/0.9.7e-sgipl1/openssl-
0.9.7e/doc/apps
Page 1 (printed 10/20/05)
DSAPARAM(1) 30/Jan/2003 (0.9.7e) 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.
Page 1 (printed 10/20/05)
DSAPARAM(1) 30/Jan/2003 (0.9.7e) DSAPARAM(1)-randfile(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 it's unique id string) will
cause req 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)
Page 2 (printed 10/20/05)
