openssl/doc/apps/gendsa.pod
2009-04-15 15:27:03 +00:00

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=pod
=head1 NAME
gendsa - generate a DSA private key from a set of parameters
=head1 SYNOPSIS
B<openssl> B<gendsa>
[B<-out filename>]
[B<-des>]
[B<-des3>]
[B<-idea>]
[B<-rand file(s)>]
[B<-engine id>]
[B<paramfile>]
=head1 DESCRIPTION
The B<gendsa> command generates a DSA private key from a DSA parameter file
(which will be typically generated by the B<openssl dsaparam> command).
=head1 OPTIONS
=over 4
=item B<-des|-des3|-idea>
These options encrypt the private key with the DES, triple DES, or the
IDEA ciphers respectively before outputting it. A pass phrase is prompted for.
If none of these options is specified no encryption is used.
=item B<-rand file(s)>
a file or files containing random data used to seed the random number
generator, or an EGD socket (see L<RAND_egd(3)|RAND_egd(3)>).
Multiple files can be specified separated by a OS-dependent character.
The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
all others.
=item B<-engine id>
specifying an engine (by its unique B<id> string) will cause B<gendsa>
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.
=item B<paramfile>
This option specifies the DSA parameter file to use. The parameters in this
file determine the size of the private key. DSA parameters can be generated
and examined using the B<openssl dsaparam> command.
=back
=head1 NOTES
DSA key generation is little more than random number generation so it is
much quicker that RSA key generation for example.
=head1 SEE ALSO
L<dsaparam(1)|dsaparam(1)>, L<dsa(1)|dsa(1)>, L<genrsa(1)|genrsa(1)>,
L<rsa(1)|rsa(1)>
=cut