openssl dgst, openssl enc: check for end of input

[thirdparty/openssl.git] / doc / man1 / gendsa.pod

=pod

=head1 NAME

openssl-gendsa,
gendsa - generate a DSA private key from a set of parameters

=head1 SYNOPSIS

B<openssl> B<gendsa>
[B<-help>]
[B<-out filename>]
[B<-aes128>]
[B<-aes192>]
[B<-aes256>]
[B<-aria128>]
[B<-aria192>]
[B<-aria256>]
[B<-camellia128>]
[B<-camellia192>]
[B<-camellia256>]
[B<-des>]
[B<-des3>]
[B<-idea>]
[B<-rand file...>]
[B<-writerand file>]
[B<-engine id>]
[B<-verbose>]
[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<-help>

Print out a usage message.

=item B<-out filename>

Output the key to the specified file. If this argument is not specified then
standard output is used.

=item B<-aes128>, B<-aes192>, B<-aes256>, B<-aria128>, B<-aria192>, B<-aria256>, B<-camellia128>, B<-camellia192>, B<-camellia256>, B<-des>, B<-des3>, B<-idea>

These options encrypt the private key with specified
cipher before outputting it. A pass phrase is prompted for.
If none of these options is specified no encryption is used.

=item B<-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 B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
all others.

=item [B<-writerand file>]

Writes random data to the specified I<file> upon exit.
This can be used with a subsequent B<-rand> flag.

=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<-verbose>

Print extra details about the operations being performed.

=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)>, L<dsa(1)>, L<genrsa(1)>,
L<rsa(1)>

=head1 COPYRIGHT

Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (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
L<https://www.openssl.org/source/license.html>.

=cut