114 lines
3.7 KiB
HTML
Executable File
114 lines
3.7 KiB
HTML
Executable File
<?xml version="1.0" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>openssl-rand</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<link rev="made" href="mailto:" />
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</head>
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<body>
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<ul id="index">
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<li><a href="#NAME">NAME</a></li>
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<li><a href="#SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#DESCRIPTION">DESCRIPTION</a></li>
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<li><a href="#OPTIONS">OPTIONS</a></li>
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<li><a href="#SEE-ALSO">SEE ALSO</a></li>
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<li><a href="#HISTORY">HISTORY</a></li>
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<li><a href="#COPYRIGHT">COPYRIGHT</a></li>
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</ul>
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<h1 id="NAME">NAME</h1>
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<p>openssl-rand - generate pseudo-random bytes</p>
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<h1 id="SYNOPSIS">SYNOPSIS</h1>
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<p><b>openssl rand</b> [<b>-help</b>] [<b>-out</b> <i>file</i>] [<b>-base64</b>] [<b>-hex</b>] [<b>-engine</b> <i>id</i>] [<b>-rand</b> <i>files</i>] [<b>-writerand</b> <i>file</i>] [<b>-provider</b> <i>name</i>] [<b>-provider-path</b> <i>path</i>] [<b>-propquery</b> <i>propq</i>] <i>num</i></p>
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<h1 id="DESCRIPTION">DESCRIPTION</h1>
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<p>This command generates <i>num</i> random bytes using a cryptographically secure pseudo random number generator (CSPRNG).</p>
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<p>The random bytes are generated using the <a href="../man3/RAND_bytes.html">RAND_bytes(3)</a> function, which provides a security level of 256 bits, provided it managed to seed itself successfully from a trusted operating system entropy source. Otherwise, the command will fail with a nonzero error code. For more details, see <a href="../man3/RAND_bytes.html">RAND_bytes(3)</a>, <a href="../man7/RAND.html">RAND(7)</a>, and <a href="../man7/EVP_RAND.html">EVP_RAND(7)</a>.</p>
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<h1 id="OPTIONS">OPTIONS</h1>
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<dl>
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<dt id="help"><b>-help</b></dt>
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<dd>
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<p>Print out a usage message.</p>
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</dd>
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<dt id="out-file"><b>-out</b> <i>file</i></dt>
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<dd>
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<p>Write to <i>file</i> instead of standard output.</p>
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</dd>
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<dt id="base64"><b>-base64</b></dt>
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<dd>
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<p>Perform base64 encoding on the output.</p>
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</dd>
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<dt id="hex"><b>-hex</b></dt>
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<dd>
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<p>Show the output as a hex string.</p>
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</dd>
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<dt id="engine-id"><b>-engine</b> <i>id</i></dt>
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<dd>
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<p>See <a href="../man1/openssl.html">"Engine Options" in openssl(1)</a>. This option is deprecated.</p>
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</dd>
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<dt id="rand-files--writerand-file"><b>-rand</b> <i>files</i>, <b>-writerand</b> <i>file</i></dt>
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<dd>
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<p>See <a href="../man1/openssl.html">"Random State Options" in openssl(1)</a> for details.</p>
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</dd>
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<dt id="provider-name"><b>-provider</b> <i>name</i></dt>
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<dd>
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</dd>
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<dt id="provider-path-path"><b>-provider-path</b> <i>path</i></dt>
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<dd>
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</dd>
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<dt id="propquery-propq"><b>-propquery</b> <i>propq</i></dt>
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<dd>
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<p>See <a href="../man1/openssl.html">"Provider Options" in openssl(1)</a>, <a href="../man7/provider.html">provider(7)</a>, and <a href="../man7/property.html">property(7)</a>.</p>
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</dd>
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</dl>
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<h1 id="SEE-ALSO">SEE ALSO</h1>
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<p><a href="../man1/openssl.html">openssl(1)</a>, <a href="../man3/RAND_bytes.html">RAND_bytes(3)</a>, <a href="../man7/RAND.html">RAND(7)</a>, <a href="../man7/EVP_RAND.html">EVP_RAND(7)</a></p>
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<h1 id="HISTORY">HISTORY</h1>
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<p>The <b>-engine</b> option was deprecated in OpenSSL 3.0.</p>
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<h1 id="COPYRIGHT">COPYRIGHT</h1>
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<p>Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.</p>
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<p>Licensed under the Apache License 2.0 (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>
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</body>
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</html>
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