mirror of
https://github.com/php/doc-es.git
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142 lines
4.0 KiB
XML
142 lines
4.0 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: f08b9a8aee8330c248cd84b3f546391fedccd9f1 Maintainer: PhilDaiguille Status: ready -->
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<!-- Reviewed: no -->
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<refentry xml:id="function.random-bytes" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>random_bytes</refname>
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<refpurpose>Obtiene bytes aleatorios criptográficamente seguros</refpurpose>
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</refnamediv>
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<refsect1 role="description"><!-- {{{ -->
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&reftitle.description;
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<methodsynopsis>
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<type>string</type><methodname>random_bytes</methodname>
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<methodparam><type>int</type><parameter>length</parameter></methodparam>
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</methodsynopsis>
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<para>
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Genera una cadena que contiene bytes seleccionados uniformemente de manera aleatoria con el valor de <parameter>length</parameter>.
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</para>
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<para>
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Dado que los bytes devueltos se eligen completamente al azar, la cadena resultante probablemente contendrá
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caracteres no imprimibles o secuencias UTF-8 inválidas. Puede ser necesario
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codificarlos antes de la transmisión o visualización.
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</para>
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<para>
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La aleatorización generada por esta función es adecuada para todas las aplicaciones, incluyendo
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la generación de secretos a largo plazo, como claves de cifrado.
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</para>
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&csprng.sources;
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&csprng.function.backport;
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</refsect1><!-- }}} -->
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<refsect1 role="parameters"><!-- {{{ -->
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&reftitle.parameters;
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<variablelist>
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<varlistentry>
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<term><parameter>length</parameter></term>
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<listitem>
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<para>
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La longitud de la &string; aleatoria que debe ser devuelta en bytes; debe ser mayor o igual a <literal>1</literal>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1><!-- }}} -->
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<refsect1 role="returnvalues"><!-- {{{ -->
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&reftitle.returnvalues;
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<para>
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Devuelve una &string; que contiene el número solicitado de bytes criptográficamente seguros.
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</para>
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</refsect1><!-- }}} -->
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<refsect1 role="errors"><!-- {{{ -->
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&reftitle.errors;
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<itemizedlist>
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&csprng.errors;
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<listitem>
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<simpara>
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Si el valor de <parameter>length</parameter> es menor que <literal>1</literal>,
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se lanzará una <classname>ValueError</classname>.
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</simpara>
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</listitem>
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</itemizedlist>
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</refsect1><!-- }}} -->
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<refsect1 role="changelog">
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&reftitle.changelog;
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>8.2.0</entry>
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<entry>
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En caso de fallo <acronym>CSPRNG</acronym>, esta función lanzará
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ahora una <classname>Random\RandomException</classname>.
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Anteriormente se lanzaba una <classname>Exception</classname> básica.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</refsect1>
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<refsect1 role="examples"><!-- {{{ -->
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&reftitle.examples;
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<example xml:id="random-bytes.example.basic"><!-- {{{ -->
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<title>Ejemplo con <function>random_bytes</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$bytes = random_bytes(5);
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var_dump(bin2hex($bytes));
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?>
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]]>
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</programlisting>
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&example.outputs.similar;
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<screen>
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<![CDATA[
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string(10) "385e33f741"
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]]>
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</screen>
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</example><!-- }}} -->
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</refsect1><!-- }}} -->
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<refsect1 role="seealso"><!-- {{{ -->
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&reftitle.seealso;
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<simplelist>
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<member><function>Random\Randomizer::getBytes</function></member>
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<member><function>random_int</function></member>
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<member><function>bin2hex</function></member>
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<member><function>base64_encode</function></member>
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</simplelist>
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</refsect1><!-- }}} -->
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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