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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
commit253e67c8b3a72b3a4757fdbc5845297628db0a4a (patch)
treeadf53b66087aa30dfbf8bf391a1dadb044c3bf4d /static/netbsd/man1/openssl_ecparam.1
parenta9157ce950dfe2fc30795d43b9d79b9d1bffc48b (diff)
docs: Added All NetBSD Manuals
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+.\" $NetBSD: openssl_ecparam.1,v 1.1.1.2 2023/04/18 14:19:15 christos Exp $
+.\"
+.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
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+..
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+..
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+..
+.\" Set up some character translations and predefined strings. \*(-- will
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+.\" double quote, and \*(R" will give a right double quote. \*(C+ will
+.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
+.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
+.\" nothing in troff, for use with C<>.
+.tr \(*W-
+.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
+.ie n \{\
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+'br\}
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+. ds -- \|\(em\|
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+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD. Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
+.de IX
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+.\"
+.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
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+. \" simple accents for nroff and troff
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+.\}
+. \" troff and (daisy-wheel) nroff accents
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+.ds ae a\h'-(\w'a'u*4/10)'e
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+. \" corrections for vroff
+.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
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+. \" for low resolution devices (crt and lpr)
+.if \n(.H>23 .if \n(.V>19 \
+\{\
+. ds : e
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+. ds ae ae
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+.\}
+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "ECPARAM 1"
+.TH ECPARAM 1 "2018-09-23" "1.1.1i" "OpenSSL"
+.\" For nroff, turn off justification. Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+openssl\-ecparam,
+ecparam \- EC parameter manipulation and generation
+.SH "LIBRARY"
+libcrypto, -lcrypto
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\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 "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This command is used to manipulate or generate \s-1EC\s0 parameter files.
+.SH "OPTIONS"
+.IX Header "OPTIONS"
+.IP "\fB\-help\fR" 4
+.IX Item "-help"
+Print out a usage message.
+.IP "\fB\-inform DER|PEM\fR" 4
+.IX Item "-inform DER|PEM"
+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 "\fB\-outform DER|PEM\fR" 4
+.IX Item "-outform DER|PEM"
+This specifies the output format, the options have the same meaning and default
+as the \fB\-inform\fR option.
+.IP "\fB\-in filename\fR" 4
+.IX Item "-in filename"
+This specifies the input filename to read parameters from or standard input if
+this option is not specified.
+.IP "\fB\-out filename\fR" 4
+.IX Item "-out filename"
+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 "\fB\-noout\fR" 4
+.IX Item "-noout"
+This option inhibits the output of the encoded version of the parameters.
+.IP "\fB\-text\fR" 4
+.IX Item "-text"
+This option prints out the \s-1EC\s0 parameters in human readable form.
+.IP "\fB\-C\fR" 4
+.IX Item "-C"
+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 "\fB\-check\fR" 4
+.IX Item "-check"
+Validate the elliptic curve parameters.
+.IP "\fB\-name arg\fR" 4
+.IX Item "-name arg"
+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 "\fB\-list_curves\fR" 4
+.IX Item "-list_curves"
+If this options is specified \fBecparam\fR will print out a list of all
+currently implemented \s-1EC\s0 parameters names and exit.
+.IP "\fB\-conv_form\fR" 4
+.IX Item "-conv_form"
+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.
+\&\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 "\fB\-param_enc arg\fR" 4
+.IX Item "-param_enc arg"
+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
+\&\s-1EC\s0 parameters structures). The default value is \fBnamed_curve\fR.
+\&\fBNote\fR the \fBimplicitlyCA\fR alternative, as specified in \s-1RFC 3279,\s0
+is currently not implemented in OpenSSL.
+.IP "\fB\-no_seed\fR" 4
+.IX Item "-no_seed"
+This option inhibits that the 'seed' for the parameter generation
+is included in the ECParameters structure (see \s-1RFC 3279\s0).
+.IP "\fB\-genkey\fR" 4
+.IX Item "-genkey"
+This option will generate an \s-1EC\s0 private key using the specified parameters.
+.IP "\fB\-rand file...\fR" 4
+.IX Item "-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 \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
+all others.
+.IP "[\fB\-writerand file\fR]" 4
+.IX Item "[-writerand file]"
+Writes random data to the specified \fIfile\fR upon exit.
+This can be used with a subsequent \fB\-rand\fR flag.
+.IP "\fB\-engine id\fR" 4
+.IX Item "-engine id"
+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 "NOTES"
+.IX Header "NOTES"
+\&\s-1PEM\s0 format \s-1EC\s0 parameters use the header and footer lines:
+.PP
+.Vb 2
+\& \-\-\-\-\-BEGIN EC PARAMETERS\-\-\-\-\-
+\& \-\-\-\-\-END EC PARAMETERS\-\-\-\-\-
+.Ve
+.PP
+OpenSSL is currently not able to generate new groups and therefore
+\&\fBecparam\fR can only create \s-1EC\s0 parameters from known (named) curves.
+.SH "EXAMPLES"
+.IX Header "EXAMPLES"
+To create \s-1EC\s0 parameters with the group 'prime192v1':
+.PP
+.Vb 1
+\& openssl ecparam \-out ec_param.pem \-name prime192v1
+.Ve
+.PP
+To create \s-1EC\s0 parameters with explicit parameters:
+.PP
+.Vb 1
+\& openssl ecparam \-out ec_param.pem \-name prime192v1 \-param_enc explicit
+.Ve
+.PP
+To validate given \s-1EC\s0 parameters:
+.PP
+.Vb 1
+\& openssl ecparam \-in ec_param.pem \-check
+.Ve
+.PP
+To create \s-1EC\s0 parameters and a private key:
+.PP
+.Vb 1
+\& openssl ecparam \-out ec_key.pem \-name prime192v1 \-genkey
+.Ve
+.PP
+To change the point encoding to 'compressed':
+.PP
+.Vb 1
+\& 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
+\& openssl ecparam \-in ec_param.pem \-noout \-text
+.Ve
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBec\fR\|(1), \fBdsaparam\fR\|(1)
+.SH "COPYRIGHT"
+.IX Header "COPYRIGHT"
+Copyright 2003\-2018 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+Licensed under the OpenSSL license (the \*(L"License\*(R"). 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
+<https://www.openssl.org/source/license.html>.