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openssl-verify.xml
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openssl-verify.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 497c40ac164d5873fd87f622dfdeb5206392b446 Maintainer: duanxiaoqiang Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<refentry xml:id="function.openssl-verify" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>openssl_verify</refname>
<refpurpose>验证签名</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>int</type><type>false</type></type><methodname>openssl_verify</methodname>
<methodparam><type>string</type><parameter>data</parameter></methodparam>
<methodparam><type>string</type><parameter>signature</parameter></methodparam>
<methodparam><type class="union"><type>OpenSSLAsymmetricKey</type><type>OpenSSLCertificate</type><type>array</type><type>string</type></type><parameter>public_key</parameter></methodparam>
<methodparam choice="opt"><type class="union"><type>string</type><type>int</type></type><parameter>algorithm</parameter><initializer><constant>OPENSSL_ALGO_SHA1</constant></initializer></methodparam>
</methodsynopsis>
<para>
<function>openssl_verify</function> 使用与 <parameter>public_key</parameter> 关联的公钥验证指定数据 <parameter>data</parameter>
的签名 <parameter>signature</parameter> 是否正确。这必须是与用于签名的私钥相对应的公钥。
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
以前用来生成签名的数据字符串。
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>signature</parameter></term>
<listitem>
<para>
原始二进制字符串,通过 <function>openssl_sign</function> 或类似的函数生成。
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>public_key</parameter></term>
<listitem>
<para>
<classname>OpenSSLAsymmetricKey</classname> - 一个密钥, 通过 <function>openssl_get_publickey</function> 函数返回。
</para>
<para>
<type>string</type> - 一个 <acronym>PEM</acronym> 格式的密钥(比如 <literal>-----BEGIN PUBLIC KEY-----
MIIBCgK...</literal>)
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>algorithm</parameter></term>
<listitem>
<para>
<type>int</type> - 以下签名算法之一 <link linkend="openssl.signature-algos">Signature Algorithms</link>.
</para>
<para>
<type>string</type> - 由 <function>openssl_get_md_methods</function> 函数返回的可用字符串,比如,"sha1WithRSAEncryption" 或者 "sha512".
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
如果签名正确返回 1,签名错误返回 0,错误时返回 -1 或 &false;。
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
<parameter>public_key</parameter> 现在接受 <classname>OpenSSLAsymmetricKey</classname>
或 <classname>OpenSSLCertificate</classname> 实例;之前接受类型 <literal>OpenSSL key</literal> 或
<literal>OpenSSL X.509</literal> 的 &resource;。
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>openssl_verify</function> 示例</title>
<programlisting role="php">
<![CDATA[
<?php
// $data and $signature are assumed to contain the data and the signature
// fetch public key from certificate and ready it
$pubkeyid = openssl_pkey_get_public("file://src/openssl-0.9.6/demos/sign/cert.pem");
// state whether signature is okay or not
$ok = openssl_verify($data, $signature, $pubkeyid);
if ($ok == 1) {
echo "good";
} elseif ($ok == 0) {
echo "bad";
} else {
echo "ugly, error checking signature";
}
// free the key from memory
openssl_free_key($pubkeyid);
?>
]]>
</programlisting>
</example>
<example>
<title><function>openssl_verify</function> 示例</title>
<programlisting role="php">
<![CDATA[
<?php
//data you want to sign
$data = 'my data';
//create new private and public key
$private_key_res = openssl_pkey_new(array(
"private_key_bits" => 2048,
"private_key_type" => OPENSSL_KEYTYPE_RSA,
));
$details = openssl_pkey_get_details($private_key_res);
$public_key_res = openssl_pkey_get_public($details['key']);
//create signature
openssl_sign($data, $signature, $private_key_res, "sha256WithRSAEncryption");
//verify signature
$ok = openssl_verify($data, $signature, $public_key_res, OPENSSL_ALGO_SHA256);
if ($ok == 1) {
echo "valid";
} elseif ($ok == 0) {
echo "invalid";
} else {
echo "error: ".openssl_error_string();
}
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>openssl_sign</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->