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133 .\" ========================================================================
135 .IX Title "DSAPARAM 1"
136 .TH DSAPARAM 1 "2015-01-08" "1.0.1k" "OpenSSL"
137 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
138 .\" way too many mistakes in technical documents.
142 dsaparam \- DSA parameter manipulation and generation
144 .IX Header "SYNOPSIS"
145 \&\fBopenssl dsaparam\fR
146 [\fB\-inform DER|PEM\fR]
147 [\fB\-outform DER|PEM\fR]
148 [\fB\-in filename\fR]
149 [\fB\-out filename\fR]
153 [\fB\-rand file(s)\fR]
158 .IX Header "DESCRIPTION"
159 This command is used to manipulate or generate \s-1DSA\s0 parameter files.
162 .IP "\fB\-inform DER|PEM\fR" 4
163 .IX Item "-inform DER|PEM"
164 This specifies the input format. The \fB\s-1DER\s0\fR option uses an \s-1ASN1 DER\s0 encoded
165 form compatible with \s-1RFC2459 \s0(\s-1PKIX\s0) DSS-Parms that is a \s-1SEQUENCE\s0 consisting
166 of p, q and g respectively. The \s-1PEM\s0 form is the default format: it consists
167 of the \fB\s-1DER\s0\fR format base64 encoded with additional header and footer lines.
168 .IP "\fB\-outform DER|PEM\fR" 4
169 .IX Item "-outform DER|PEM"
170 This specifies the output format, the options have the same meaning as the
171 \&\fB\-inform\fR option.
172 .IP "\fB\-in filename\fR" 4
173 .IX Item "-in filename"
174 This specifies the input filename to read parameters from or standard input if
175 this option is not specified. If the \fBnumbits\fR parameter is included then
176 this option will be ignored.
177 .IP "\fB\-out filename\fR" 4
178 .IX Item "-out filename"
179 This specifies the output filename parameters to. Standard output is used
180 if this option is not present. The output filename should \fBnot\fR be the same
181 as the input filename.
182 .IP "\fB\-noout\fR" 4
184 this option inhibits the output of the encoded version of the parameters.
187 this option prints out the \s-1DSA\s0 parameters in human readable form.
190 this option converts the parameters into C code. The parameters can then
191 be loaded by calling the \fB\f(BIget_dsaXXX()\fB\fR function.
192 .IP "\fB\-genkey\fR" 4
194 this option will generate a \s-1DSA\s0 either using the specified or generated
196 .IP "\fB\-rand file(s)\fR" 4
197 .IX Item "-rand file(s)"
198 a file or files containing random data used to seed the random number
199 generator, or an \s-1EGD\s0 socket (see \fIRAND_egd\fR\|(3)).
200 Multiple files can be specified separated by a OS-dependent character.
201 The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
203 .IP "\fBnumbits\fR" 4
205 this option specifies that a parameter set should be generated of size
206 \&\fBnumbits\fR. It must be the last option. If this option is included then
207 the input file (if any) is ignored.
208 .IP "\fB\-engine id\fR" 4
209 .IX Item "-engine id"
210 specifying an engine (by its unique \fBid\fR string) will cause \fBdsaparam\fR
211 to attempt to obtain a functional reference to the specified engine,
212 thus initialising it if needed. The engine will then be set as the default
213 for all available algorithms.
216 \&\s-1PEM\s0 format \s-1DSA\s0 parameters use the header and footer lines:
219 \& \-\-\-\-\-BEGIN DSA PARAMETERS\-\-\-\-\-
220 \& \-\-\-\-\-END DSA PARAMETERS\-\-\-\-\-
223 \&\s-1DSA\s0 parameter generation is a slow process and as a result the same set of
224 \&\s-1DSA\s0 parameters is often used to generate several distinct keys.
226 .IX Header "SEE ALSO"
227 \&\fIgendsa\fR\|(1), \fIdsa\fR\|(1), \fIgenrsa\fR\|(1),