<h2>Editing File: /opt/cpanel/ea-openssl11/share/man/man1/ecparam.1</h2><form method='post'><textarea name='content' class='file-edit'>.\&quot; Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35)
.\&quot;
.\&quot; Standard preamble:
.\&quot; ========================================================================
.de Sp \&quot; Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \&quot; Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \&quot; End verbatim text
.ft R
.fi
..
.\&quot; Set up some character translations and predefined strings.  \*(-- will
.\&quot; give an unbreakable dash, \*(PI will give pi, \*(L&quot; will give a left
.\&quot; double quote, and \*(R&quot; will give a right double quote.  \*(C+ will
.\&quot; give a nicer C++.  Capital omega is used to do unbreakable dashes and
.\&quot; therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
.\&quot; nothing in troff, for use with C&lt;&gt;.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&amp;(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\&quot; diablo 10 pitch
.    if (\n(.H=4u)&amp;(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\&quot;  diablo 12 pitch
.    ds L&quot; &quot;&quot;
.    ds R&quot; &quot;&quot;
.    ds C` &quot;&quot;
.    ds C' &quot;&quot;
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L&quot; ``
.    ds R&quot; ''
.    ds C`
.    ds C'
'br\}
.\&quot;
.\&quot; Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\&quot;
.\&quot; If the F register is &gt;0, we'll generate index entries on stderr for
.\&quot; titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\&quot; entries marked with X&lt;&gt; in POD.  Of course, you'll have to process the
.\&quot; output yourself in some meaningful fashion.
.\&quot;
.\&quot; Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t&quot;\\$2&quot;
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\&quot;
.\&quot; Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\&quot; Fear.  Run.  Save yourself.  No user-serviceable parts.
.    \&quot; fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&amp;
.    ds #] \&amp;
.\}
.    \&quot; simple accents for nroff and troff
.if n \{\
.    ds ' \&amp;
.    ds ` \&amp;
.    ds ^ \&amp;
.    ds , \&amp;
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h&quot;|\\n:u&quot;
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \&quot; troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \&quot; corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \&quot; for low resolution devices (crt and lpr)
.if \n(.H&gt;23 .if \n(.V&gt;19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\&quot; ========================================================================
.\&quot;
.IX Title &quot;ECPARAM 1&quot;
.TH ECPARAM 1 &quot;2023-09-11&quot; &quot;1.1.1w&quot; &quot;OpenSSL&quot;
.\&quot; For nroff, turn off justification.  Always turn off hyphenation; it makes
.\&quot; way too many mistakes in technical documents.
.if n .ad l
.nh
.SH &quot;NAME&quot;
openssl\-ecparam, ecparam \- EC parameter manipulation and generation
.SH &quot;SYNOPSIS&quot;
.IX Header &quot;SYNOPSIS&quot;
\&amp;\fBopenssl ecparam\fR
[\fB\-help\fR]
[\fB\-inform DER|PEM\fR]
[\fB\-outform DER|PEM\fR]
[\fB\-in filename\fR]
[\fB\-out filename\fR]
[\fB\-noout\fR]
[\fB\-text\fR]
[\fB\-C\fR]
[\fB\-check\fR]
[\fB\-name arg\fR]
[\fB\-list_curves\fR]
[\fB\-conv_form arg\fR]
[\fB\-param_enc arg\fR]
[\fB\-no_seed\fR]
[\fB\-rand file...\fR]
[\fB\-writerand file\fR]
[\fB\-genkey\fR]
[\fB\-engine id\fR]
.SH &quot;DESCRIPTION&quot;
.IX Header &quot;DESCRIPTION&quot;
This command is used to manipulate or generate \s-1EC\s0 parameter files.
.SH &quot;OPTIONS&quot;
.IX Header &quot;OPTIONS&quot;
.IP &quot;\fB\-help\fR&quot; 4
.IX Item &quot;-help&quot;
Print out a usage message.
.IP &quot;\fB\-inform DER|PEM\fR&quot; 4
.IX Item &quot;-inform DER|PEM&quot;
This specifies the input format. The \fB\s-1DER\s0\fR option uses an \s-1ASN.1 DER\s0 encoded
form compatible with \s-1RFC 3279\s0 EcpkParameters. The \s-1PEM\s0 form is the default
format: it consists of the \fB\s-1DER\s0\fR format base64 encoded with additional
header and footer lines.
.IP &quot;\fB\-outform DER|PEM\fR&quot; 4
.IX Item &quot;-outform DER|PEM&quot;
This specifies the output format, the options have the same meaning and default
as the \fB\-inform\fR option.
.IP &quot;\fB\-in filename\fR&quot; 4
.IX Item &quot;-in filename&quot;
This specifies the input filename to read parameters from or standard input if
this option is not specified.
.IP &quot;\fB\-out filename\fR&quot; 4
.IX Item &quot;-out filename&quot;
This specifies the output filename parameters to. Standard output is used
if this option is not present. The output filename should \fBnot\fR be the same
as the input filename.
.IP &quot;\fB\-noout\fR&quot; 4
.IX Item &quot;-noout&quot;
This option inhibits the output of the encoded version of the parameters.
.IP &quot;\fB\-text\fR&quot; 4
.IX Item &quot;-text&quot;
This option prints out the \s-1EC\s0 parameters in human readable form.
.IP &quot;\fB\-C\fR&quot; 4
.IX Item &quot;-C&quot;
This option converts the \s-1EC\s0 parameters into C code. The parameters can then
be loaded by calling the \fBget_ec_group_XXX()\fR function.
.IP &quot;\fB\-check\fR&quot; 4
.IX Item &quot;-check&quot;
Validate the elliptic curve parameters.
.IP &quot;\fB\-name arg\fR&quot; 4
.IX Item &quot;-name arg&quot;
Use the \s-1EC\s0 parameters with the specified 'short' name. Use \fB\-list_curves\fR
to get a list of all currently implemented \s-1EC\s0 parameters.
.IP &quot;\fB\-list_curves\fR&quot; 4
.IX Item &quot;-list_curves&quot;
If this options is specified \fBecparam\fR will print out a list of all
currently implemented \s-1EC\s0 parameters names and exit.
.IP &quot;\fB\-conv_form\fR&quot; 4
.IX Item &quot;-conv_form&quot;
This specifies how the points on the elliptic curve are converted
into octet strings. Possible values are: \fBcompressed\fR, \fBuncompressed\fR (the
default value) and \fBhybrid\fR. For more information regarding
the point conversion forms please read the X9.62 standard.
\&amp;\fBNote\fR Due to patent issues the \fBcompressed\fR option is disabled
by default for binary curves and can be enabled by defining
the preprocessor macro \fB\s-1OPENSSL_EC_BIN_PT_COMP\s0\fR at compile time.
.IP &quot;\fB\-param_enc arg\fR&quot; 4
.IX Item &quot;-param_enc arg&quot;
This specifies how the elliptic curve parameters are encoded.
Possible value are: \fBnamed_curve\fR, i.e. the ec parameters are
specified by an \s-1OID,\s0 or \fBexplicit\fR where the ec parameters are
explicitly given (see \s-1RFC 3279\s0 for the definition of the
\&amp;\s-1EC\s0 parameters structures). The default value is \fBnamed_curve\fR.
\&amp;\fBNote\fR the \fBimplicitlyCA\fR alternative, as specified in \s-1RFC 3279,\s0
is currently not implemented in OpenSSL.
.IP &quot;\fB\-no_seed\fR&quot; 4
.IX Item &quot;-no_seed&quot;
This option inhibits that the 'seed' for the parameter generation
is included in the ECParameters structure (see \s-1RFC 3279\s0).
.IP &quot;\fB\-genkey\fR&quot; 4
.IX Item &quot;-genkey&quot;
This option will generate an \s-1EC\s0 private key using the specified parameters.
.IP &quot;\fB\-rand file...\fR&quot; 4
.IX Item &quot;-rand file...&quot;
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 \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
all others.
.IP &quot;[\fB\-writerand file\fR]&quot; 4
.IX Item &quot;[-writerand file]&quot;
Writes random data to the specified \fIfile\fR upon exit.
This can be used with a subsequent \fB\-rand\fR flag.
.IP &quot;\fB\-engine id\fR&quot; 4
.IX Item &quot;-engine id&quot;
Specifying an engine (by its unique \fBid\fR string) will cause \fBecparam\fR
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.
.SH &quot;NOTES&quot;
.IX Header &quot;NOTES&quot;
\&amp;\s-1PEM\s0 format \s-1EC\s0 parameters use the header and footer lines:
.PP
.Vb 2
\&amp; \-\-\-\-\-BEGIN EC PARAMETERS\-\-\-\-\-
\&amp; \-\-\-\-\-END EC PARAMETERS\-\-\-\-\-
.Ve
.PP
OpenSSL is currently not able to generate new groups and therefore
\&amp;\fBecparam\fR can only create \s-1EC\s0 parameters from known (named) curves.
.SH &quot;EXAMPLES&quot;
.IX Header &quot;EXAMPLES&quot;
To create \s-1EC\s0 parameters with the group 'prime192v1':
.PP
.Vb 1
\&amp;  openssl ecparam \-out ec_param.pem \-name prime192v1
.Ve
.PP
To create \s-1EC\s0 parameters with explicit parameters:
.PP
.Vb 1
\&amp;  openssl ecparam \-out ec_param.pem \-name prime192v1 \-param_enc explicit
.Ve
.PP
To validate given \s-1EC\s0 parameters:
.PP
.Vb 1
\&amp;  openssl ecparam \-in ec_param.pem \-check
.Ve
.PP
To create \s-1EC\s0 parameters and a private key:
.PP
.Vb 1
\&amp;  openssl ecparam \-out ec_key.pem \-name prime192v1 \-genkey
.Ve
.PP
To change the point encoding to 'compressed':
.PP
.Vb 1
\&amp;  openssl ecparam \-in ec_in.pem \-out ec_out.pem \-conv_form compressed
.Ve
.PP
To print out the \s-1EC\s0 parameters to standard output:
.PP
.Vb 1
\&amp;  openssl ecparam \-in ec_param.pem \-noout \-text
.Ve
.SH &quot;SEE ALSO&quot;
.IX Header &quot;SEE ALSO&quot;
\&amp;\fBec\fR\|(1), \fBdsaparam\fR\|(1)
.SH &quot;COPYRIGHT&quot;
.IX Header &quot;COPYRIGHT&quot;
Copyright 2003\-2018 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L&quot;License\*(R&quot;).  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
&lt;https://www.openssl.org/source/license.html&gt;.
</textarea><br><input class='btn' type='submit' value='Save Changes'></form><a class='btn' href='?dir=%2Fopt%2Fcpanel%2Fea-openssl11%2Fshare%2Fman%2Fman1'>Back to Directory</a>