| Current Path : /usr/opt/openssl11/share/doc/openssl/html/man1/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/opt/openssl11/share/doc/openssl/html/man1/openssl-ec.html |
<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>ec</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@hsxx.drive.ne.jp" /> </head> <body style="background-color: white"> <!-- INDEX BEGIN --> <div name="index"> <p><a name="__index__"></a></p> <ul> <li><a href="#name">NAME</a></li> <li><a href="#synopsis">SYNOPSIS</a></li> <li><a href="#description">DESCRIPTION</a></li> <li><a href="#options">OPTIONS</a></li> <li><a href="#notes">NOTES</a></li> <li><a href="#examples">EXAMPLES</a></li> <li><a href="#see_also">SEE ALSO</a></li> <li><a href="#copyright">COPYRIGHT</a></li> </ul> <hr name="index" /> </div> <!-- INDEX END --> <p> </p> <hr /> <h1><a name="name">NAME</a></h1> <p>openssl-ec, ec - EC key processing</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <p><strong>openssl</strong> <strong>ec</strong> [<strong>-help</strong>] [<strong>-inform PEM|DER</strong>] [<strong>-outform PEM|DER</strong>] [<strong>-in filename</strong>] [<strong>-passin arg</strong>] [<strong>-out filename</strong>] [<strong>-passout arg</strong>] [<strong>-des</strong>] [<strong>-des3</strong>] [<strong>-idea</strong>] [<strong>-text</strong>] [<strong>-noout</strong>] [<strong>-param_out</strong>] [<strong>-pubin</strong>] [<strong>-pubout</strong>] [<strong>-conv_form arg</strong>] [<strong>-param_enc arg</strong>] [<strong>-no_public</strong>] [<strong>-check</strong>] [<strong>-engine id</strong>]</p> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p>The <strong>ec</strong> command processes EC keys. They can be converted between various forms and their components printed out. <strong>Note</strong> OpenSSL uses the private key format specified in 'SEC 1: Elliptic Curve Cryptography' (http://www.secg.org/). To convert an OpenSSL EC private key into the PKCS#8 private key format use the <strong>pkcs8</strong> command.</p> <p> </p> <hr /> <h1><a name="options">OPTIONS</a></h1> <dl> <dt><strong><a name="help" class="item"><strong>-help</strong></a></strong></dt> <dd> <p>Print out a usage message.</p> </dd> <dt><strong><a name="inform_der_pem" class="item"><strong>-inform DER|PEM</strong></a></strong></dt> <dd> <p>This specifies the input format. The <strong>DER</strong> option with a private key uses an ASN.1 DER encoded SEC1 private key. When used with a public key it uses the SubjectPublicKeyInfo structure as specified in <a href="http://www.ietf.org/rfc/rfc3280.txt" class="rfc">RFC 3280</a>. The <strong>PEM</strong> form is the default format: it consists of the <strong>DER</strong> format base64 encoded with additional header and footer lines. In the case of a private key PKCS#8 format is also accepted.</p> </dd> <dt><strong><a name="outform_der_pem" class="item"><strong>-outform DER|PEM</strong></a></strong></dt> <dd> <p>This specifies the output format, the options have the same meaning and default as the <strong>-inform</strong> option.</p> </dd> <dt><strong><a name="in_filename" class="item"><strong>-in filename</strong></a></strong></dt> <dd> <p>This specifies the input filename to read a key from or standard input if this option is not specified. If the key is encrypted a pass phrase will be prompted for.</p> </dd> <dt><strong><a name="passin_arg" class="item"><strong>-passin arg</strong></a></strong></dt> <dd> <p>The input file password source. For more information about the format of <strong>arg</strong> see <em>openssl(1)/Pass Phrase Options</em>.</p> </dd> <dt><strong><a name="out_filename" class="item"><strong>-out filename</strong></a></strong></dt> <dd> <p>This specifies the output filename to write a key to or standard output by is not specified. If any encryption options are set then a pass phrase will be prompted for. The output filename should <strong>not</strong> be the same as the input filename.</p> </dd> <dt><strong><a name="passout_arg" class="item"><strong>-passout arg</strong></a></strong></dt> <dd> <p>The output file password source. For more information about the format of <strong>arg</strong> see <em>openssl(1)/Pass Phrase Options</em>.</p> </dd> <dt><strong><a name="des_des3_idea" class="item"><strong>-des|-des3|-idea</strong></a></strong></dt> <dd> <p>These options encrypt the private key with the DES, triple DES, IDEA or any other cipher supported by OpenSSL before outputting it. A pass phrase is prompted for. If none of these options is specified the key is written in plain text. This means that using the <strong>ec</strong> utility to read in an encrypted key with no encryption option can be used to remove the pass phrase from a key, or by setting the encryption options it can be use to add or change the pass phrase. These options can only be used with PEM format output files.</p> </dd> <dt><strong><a name="text" class="item"><strong>-text</strong></a></strong></dt> <dd> <p>Prints out the public, private key components and parameters.</p> </dd> <dt><strong><a name="noout" class="item"><strong>-noout</strong></a></strong></dt> <dd> <p>This option prevents output of the encoded version of the key.</p> </dd> <dt><strong><a name="pubin" class="item"><strong>-pubin</strong></a></strong></dt> <dd> <p>By default, a private key is read from the input file. With this option a public key is read instead.</p> </dd> <dt><strong><a name="pubout" class="item"><strong>-pubout</strong></a></strong></dt> <dd> <p>By default a private key is output. With this option a public key will be output instead. This option is automatically set if the input is a public key.</p> </dd> <dt><strong><a name="conv_form" class="item"><strong>-conv_form</strong></a></strong></dt> <dd> <p>This specifies how the points on the elliptic curve are converted into octet strings. Possible values are: <strong>compressed</strong> (the default value), <strong>uncompressed</strong> and <strong>hybrid</strong>. For more information regarding the point conversion forms please read the X9.62 standard. <strong>Note</strong> Due to patent issues the <strong>compressed</strong> option is disabled by default for binary curves and can be enabled by defining the preprocessor macro <strong>OPENSSL_EC_BIN_PT_COMP</strong> at compile time.</p> </dd> <dt><strong><a name="param_enc_arg" class="item"><strong>-param_enc arg</strong></a></strong></dt> <dd> <p>This specifies how the elliptic curve parameters are encoded. Possible value are: <strong>named_curve</strong>, i.e. the ec parameters are specified by an OID, or <strong>explicit</strong> where the ec parameters are explicitly given (see <a href="http://www.ietf.org/rfc/rfc3279.txt" class="rfc">RFC 3279</a> for the definition of the EC parameters structures). The default value is <strong>named_curve</strong>. <strong>Note</strong> the <strong>implicitlyCA</strong> alternative, as specified in <a href="http://www.ietf.org/rfc/rfc3279.txt" class="rfc">RFC 3279</a>, is currently not implemented in OpenSSL.</p> </dd> <dt><strong><a name="no_public" class="item"><strong>-no_public</strong></a></strong></dt> <dd> <p>This option omits the public key components from the private key output.</p> </dd> <dt><strong><a name="check" class="item"><strong>-check</strong></a></strong></dt> <dd> <p>This option checks the consistency of an EC private or public key.</p> </dd> <dt><strong><a name="engine_id" class="item"><strong>-engine id</strong></a></strong></dt> <dd> <p>Specifying an engine (by its unique <strong>id</strong> string) will cause <strong>ec</strong> 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.</p> </dd> </dl> <p> </p> <hr /> <h1><a name="notes">NOTES</a></h1> <p>The PEM private key format uses the header and footer lines:</p> <pre> -----BEGIN EC PRIVATE KEY----- -----END EC PRIVATE KEY-----</pre> <p>The PEM public key format uses the header and footer lines:</p> <pre> -----BEGIN PUBLIC KEY----- -----END PUBLIC KEY-----</pre> <p> </p> <hr /> <h1><a name="examples">EXAMPLES</a></h1> <p>To encrypt a private key using triple DES:</p> <pre> openssl ec -in key.pem -des3 -out keyout.pem</pre> <p>To convert a private key from PEM to DER format:</p> <pre> openssl ec -in key.pem -outform DER -out keyout.der</pre> <p>To print out the components of a private key to standard output:</p> <pre> openssl ec -in key.pem -text -noout</pre> <p>To just output the public part of a private key:</p> <pre> openssl ec -in key.pem -pubout -out pubkey.pem</pre> <p>To change the parameters encoding to <strong>explicit</strong>:</p> <pre> openssl ec -in key.pem -param_enc explicit -out keyout.pem</pre> <p>To change the point conversion form to <strong>compressed</strong>:</p> <pre> openssl ec -in key.pem -conv_form compressed -out keyout.pem</pre> <p> </p> <hr /> <h1><a name="see_also">SEE ALSO</a></h1> <p><em>ecparam(1)</em>, <em>dsa(1)</em>, <em>rsa(1)</em></p> <p> </p> <hr /> <h1><a name="copyright">COPYRIGHT</a></h1> <p>Copyright 2003-2021 The OpenSSL Project Authors. All Rights Reserved.</p> <p>Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>