5 dsaparam - DSA parameter manipulation and generation
26 This command is used to manipulate or generate DSA parameter files.
34 Print out a usage message.
36 =item B<-inform DER|PEM>
38 This specifies the input format. The B<DER> option uses an ASN1 DER encoded
39 form compatible with RFC2459 (PKIX) DSS-Parms that is a SEQUENCE consisting
40 of p, q and g respectively. The PEM form is the default format: it consists
41 of the B<DER> format base64 encoded with additional header and footer lines.
43 =item B<-outform DER|PEM>
45 This specifies the output format, the options have the same meaning as the
50 This specifies the input filename to read parameters from or standard input if
51 this option is not specified. If the B<numbits> parameter is included then
52 this option will be ignored.
54 =item B<-out filename>
56 This specifies the output filename parameters to. Standard output is used
57 if this option is not present. The output filename should B<not> be the same
58 as the input filename.
62 This option inhibits the output of the encoded version of the parameters.
66 This option prints out the DSA parameters in human readable form.
70 This option converts the parameters into C code. The parameters can then
71 be loaded by calling the get_dsaXXX() function.
75 This option will generate a DSA either using the specified or generated
78 =item B<-rand file...>
80 A file or files containing random data used to seed the random number
82 Multiple files can be specified separated by an OS-dependent character.
83 The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
86 =item [B<-writerand file>]
88 Writes random data to the specified I<file> upon exit.
89 This can be used with a subsequent B<-rand> flag.
93 This option specifies that a parameter set should be generated of size
94 B<numbits>. It must be the last option. If this option is included then
95 the input file (if any) is ignored.
99 Specifying an engine (by its unique B<id> string) will cause B<dsaparam>
100 to attempt to obtain a functional reference to the specified engine,
101 thus initialising it if needed. The engine will then be set as the default
102 for all available algorithms.
108 PEM format DSA parameters use the header and footer lines:
110 -----BEGIN DSA PARAMETERS-----
111 -----END DSA PARAMETERS-----
113 DSA parameter generation is a slow process and as a result the same set of
114 DSA parameters is often used to generate several distinct keys.
118 L<gendsa(1)>, L<dsa(1)>, L<genrsa(1)>,
123 Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
125 Licensed under the OpenSSL license (the "License"). You may not use
126 this file except in compliance with the License. You can obtain a copy
127 in the file LICENSE in the source distribution or at
128 L<https://www.openssl.org/source/license.html>.