| =pod |
| |
| =head1 NAME |
| |
| dsaparam - DSA parameter manipulation and generation |
| |
| =head1 SYNOPSIS |
| |
| B<openssl dsaparam> |
| [B<-inform DER|PEM>] |
| [B<-outform DER|PEM>] |
| [B<-in filename>] |
| [B<-out filename>] |
| [B<-noout>] |
| [B<-text>] |
| [B<-C>] |
| [B<-rand file(s)>] |
| [B<-genkey>] |
| [B<-engine id>] |
| [B<numbits>] |
| |
| =head1 DESCRIPTION |
| |
| This command is used to manipulate or generate DSA parameter files. |
| |
| =head1 OPTIONS |
| |
| =over 4 |
| |
| =item B<-inform DER|PEM> |
| |
| This specifies the input format. The B<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 B<DER> format base64 encoded with additional header and footer lines. |
| |
| =item B<-outform DER|PEM> |
| |
| This specifies the output format, the options have the same meaning as the |
| B<-inform> option. |
| |
| =item B<-in filename> |
| |
| This specifies the input filename to read parameters from or standard input if |
| this option is not specified. If the B<numbits> parameter is included then |
| this option will be ignored. |
| |
| =item B<-out filename> |
| |
| This specifies the output filename parameters to. Standard output is used |
| if this option is not present. The output filename should B<not> be the same |
| as the input filename. |
| |
| =item B<-noout> |
| |
| this option inhibits the output of the encoded version of the parameters. |
| |
| =item B<-text> |
| |
| this option prints out the DSA parameters in human readable form. |
| |
| =item B<-C> |
| |
| this option converts the parameters into C code. The parameters can then |
| be loaded by calling the B<get_dsaXXX()> function. |
| |
| =item B<-genkey> |
| |
| this option will generate a DSA either using the specified or generated |
| parameters. |
| |
| =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<numbits> |
| |
| this option specifies that a parameter set should be generated of size |
| B<numbits>. It must be the last option. If this option is included then |
| the input file (if any) is ignored. |
| |
| =item B<-engine id> |
| |
| specifying an engine (by it's unique B<id> string) will cause B<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. |
| |
| =back |
| |
| =head1 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. |
| |
| =head1 SEE ALSO |
| |
| L<gendsa(1)|gendsa(1)>, L<dsa(1)|dsa(1)>, L<genrsa(1)|genrsa(1)>, |
| L<rsa(1)|rsa(1)> |
| |
| =cut |
