299 lines
9.7 KiB
Groff
299 lines
9.7 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL-ECPARAM 1"
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.TH OPENSSL-ECPARAM 1 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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openssl\-ecparam \- EC parameter manipulation and generation
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl ecparam\fR
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[\fB\-help\fR]
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[\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR]
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[\fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR]
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[\fB\-in\fR \fIfilename\fR]
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[\fB\-out\fR \fIfilename\fR]
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[\fB\-noout\fR]
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[\fB\-text\fR]
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[\fB\-C\fR]
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[\fB\-check\fR]
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[\fB\-check_named\fR]
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[\fB\-name\fR \fIarg\fR]
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[\fB\-list_curves\fR]
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[\fB\-conv_form\fR \fIarg\fR]
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[\fB\-param_enc\fR \fIarg\fR]
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[\fB\-no_seed\fR]
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[\fB\-genkey\fR]
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[\fB\-engine\fR \fIid\fR]
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[\fB\-rand\fR \fIfiles\fR]
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[\fB\-writerand\fR \fIfile\fR]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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This command has been deprecated.
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The \fIopenssl\-genpkey\fR\|(1) and \fIopenssl\-pkeyparam\fR\|(1) commands
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should be used instead.
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.PP
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This command is used to manipulate or generate \s-1EC\s0 parameter files.
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.PP
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OpenSSL is currently not able to generate new groups and therefore
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this command can only create \s-1EC\s0 parameters from known (named) curves.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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.IP "\fB\-help\fR" 4
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.IX Item "-help"
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Print out a usage message.
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.IP "\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR, \fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR" 4
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.IX Item "-inform DER|PEM, -outform DER|PEM"
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The input and formats; the default is \fB\s-1PEM\s0\fR.
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See \*(L"Format Options\*(R" in \fIopenssl\fR\|(1) for details.
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.Sp
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Parameters are encoded as \fBEcpkParameters\fR as specified in \s-1IETF\s0 \s-1RFC\s0 3279.
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.IP "\fB\-in\fR \fIfilename\fR" 4
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.IX Item "-in filename"
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This specifies the input filename to read parameters from or standard input if
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this option is not specified.
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.IP "\fB\-out\fR \fIfilename\fR" 4
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.IX Item "-out filename"
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This specifies the output filename parameters to. Standard output is used
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if this option is not present. The output filename should \fBnot\fR be the same
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as the input filename.
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.IP "\fB\-noout\fR" 4
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.IX Item "-noout"
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This option inhibits the output of the encoded version of the parameters.
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.IP "\fB\-text\fR" 4
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.IX Item "-text"
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This option prints out the \s-1EC\s0 parameters in human readable form.
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.IP "\fB\-C\fR" 4
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.IX Item "-C"
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This option converts the \s-1EC\s0 parameters into C code. The parameters can then
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be loaded by calling the \fIget_ec_group_XXX()\fR function.
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.IP "\fB\-check\fR" 4
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.IX Item "-check"
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Validate the elliptic curve parameters.
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.IP "\fB\-check_named\fR" 4
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.IX Item "-check_named"
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Validate the elliptic name curve parameters by checking if the curve parameters
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match any built-in curves.
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.IP "\fB\-name\fR \fIarg\fR" 4
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.IX Item "-name arg"
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Use the \s-1EC\s0 parameters with the specified 'short' name. Use \fB\-list_curves\fR
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to get a list of all currently implemented \s-1EC\s0 parameters.
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.IP "\fB\-list_curves\fR" 4
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.IX Item "-list_curves"
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Print out a list of all currently implemented \s-1EC\s0 parameters names and exit.
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.IP "\fB\-conv_form\fR \fIarg\fR" 4
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.IX Item "-conv_form arg"
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This specifies how the points on the elliptic curve are converted
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into octet strings. Possible values are: \fBcompressed\fR, \fBuncompressed\fR (the
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default value) and \fBhybrid\fR. For more information regarding
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the point conversion forms please read the X9.62 standard.
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\&\fBNote\fR Due to patent issues the \fBcompressed\fR option is disabled
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by default for binary curves and can be enabled by defining
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the preprocessor macro \fB\s-1OPENSSL_EC_BIN_PT_COMP\s0\fR at compile time.
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.IP "\fB\-param_enc\fR \fIarg\fR" 4
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.IX Item "-param_enc arg"
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This specifies how the elliptic curve parameters are encoded.
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Possible value are: \fBnamed_curve\fR, i.e. the ec parameters are
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specified by an \s-1OID\s0, or \fBexplicit\fR where the ec parameters are
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explicitly given (see \s-1RFC\s0 3279 for the definition of the
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\&\s-1EC\s0 parameters structures). The default value is \fBnamed_curve\fR.
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\&\fBNote\fR the \fBimplicitlyCA\fR alternative, as specified in \s-1RFC\s0 3279,
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is currently not implemented in OpenSSL.
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.IP "\fB\-no_seed\fR" 4
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.IX Item "-no_seed"
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This option inhibits that the 'seed' for the parameter generation
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is included in the ECParameters structure (see \s-1RFC\s0 3279).
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.IP "\fB\-genkey\fR" 4
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.IX Item "-genkey"
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This option will generate an \s-1EC\s0 private key using the specified parameters.
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.IP "\fB\-engine\fR \fIid\fR" 4
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.IX Item "-engine id"
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See \*(L"Engine Options\*(R" in \fIopenssl\fR\|(1).
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.IP "\fB\-rand\fR \fIfiles\fR, \fB\-writerand\fR \fIfile\fR" 4
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.IX Item "-rand files, -writerand file"
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See \*(L"Random State Options\*(R" in \fIopenssl\fR\|(1) for details.
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.SH "EXAMPLES"
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.IX Header "EXAMPLES"
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Examples equivalent to these can be found in the documentation for the
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non-deprecated \fIopenssl\-genpkey\fR\|(1) and \fIopenssl\-pkeyparam\fR\|(1) commands.
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.PP
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To create \s-1EC\s0 parameters with the group 'prime192v1':
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.PP
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.Vb 1
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\& openssl ecparam \-out ec_param.pem \-name prime192v1
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.Ve
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.PP
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To create \s-1EC\s0 parameters with explicit parameters:
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.PP
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.Vb 1
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\& openssl ecparam \-out ec_param.pem \-name prime192v1 \-param_enc explicit
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.Ve
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.PP
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To validate given \s-1EC\s0 parameters:
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.PP
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.Vb 1
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\& openssl ecparam \-in ec_param.pem \-check
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.Ve
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.PP
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To create \s-1EC\s0 parameters and a private key:
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.PP
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.Vb 1
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\& openssl ecparam \-out ec_key.pem \-name prime192v1 \-genkey
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.Ve
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.PP
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To change the point encoding to 'compressed':
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.PP
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.Vb 1
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\& openssl ecparam \-in ec_in.pem \-out ec_out.pem \-conv_form compressed
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.Ve
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.PP
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To print out the \s-1EC\s0 parameters to standard output:
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.PP
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.Vb 1
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\& openssl ecparam \-in ec_param.pem \-noout \-text
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.Ve
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fIopenssl\fR\|(1),
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\&\fIopenssl\-pkeyparam\fR\|(1),
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\&\fIopenssl\-genpkey\fR\|(1),
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\&\fIopenssl\-ec\fR\|(1),
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\&\fIopenssl\-dsaparam\fR\|(1)
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.SH "HISTORY"
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.IX Header "HISTORY"
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This command was deprecated in OpenSSL 3.0.
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2003\-2020 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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