function.openssl-open.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Open sealed data</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.openssl-get-publickey.html">openssl_get_publickey</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.openssl-pkcs12-export-to-file.html">openssl_pkcs12_export_to_file</a></div> <div class="up"><a href="ref.openssl.html">OpenSSL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.openssl-open" class="refentry"> <div class="refnamediv"> <h1 class="refname">openssl_open</h1> <p class="verinfo">(PHP 4 >= 4.0.4, PHP 5)</p><p class="refpurpose"><span class="refname">openssl_open</span> — <span class="dc-title">Open sealed data</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>openssl_open</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$sealed_data</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter reference">&$open_data</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$env_key</tt></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$priv_key_id</tt></span> )</div> <p class="para rdfs-comment"> <b>openssl_open()</b> opens (decrypts) <i><tt class="parameter">sealed_data</tt></i> using the private key associated with the key identifier <i><tt class="parameter">priv_key_id</tt></i> and the envelope key <i><tt class="parameter">env_key</tt></i>, and fills <i><tt class="parameter">open_data</tt></i> with the decrypted data. The envelope key is generated when the data are sealed and can only be used by one specific private key. See <a href="function.openssl-seal.html" class="function">openssl_seal()</a> for more information. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">sealed_data</tt></i></span> <dd> <p class="para"> </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">open_data</tt></i></span> <dd> <p class="para"> If the call is successful the opened data is returned in this parameter. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">env_key</tt></i></span> <dd> <p class="para"> </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">priv_key_id</tt></i></span> <dd> <p class="para"> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>openssl_open()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// $sealed and $env_key are assumed to contain the sealed data<br />// and our envelope key, both given to us by the sealer.<br /><br />// fetch private key from file and ready it<br /></span><span style="color: #0000BB">$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #DD0000">"/src/openssl-0.9.6/demos/sign/key.pem"</span><span style="color: #007700">, </span><span style="color: #DD0000">"r"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$priv_key </span><span style="color: #007700">= </span><span style="color: #0000BB">fread</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #0000BB">8192</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$pkeyid </span><span style="color: #007700">= </span><span style="color: #0000BB">openssl_get_privatekey</span><span style="color: #007700">(</span><span style="color: #0000BB">$priv_key</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// decrypt the data and store it in $open<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">openssl_open</span><span style="color: #007700">(</span><span style="color: #0000BB">$sealed</span><span style="color: #007700">, </span><span style="color: #0000BB">$open</span><span style="color: #007700">, </span><span style="color: #0000BB">$env_key</span><span style="color: #007700">, </span><span style="color: #0000BB">$pkeyid</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"here is the opened data: "</span><span style="color: #007700">, </span><span style="color: #0000BB">$open</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"failed to open data"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// free the private key from memory<br /></span><span style="color: #0000BB">openssl_free_key</span><span style="color: #007700">(</span><span style="color: #0000BB">$pkeyid</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.openssl-seal.html" class="function" rel="rdfs-seeAlso">openssl_seal()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.openssl-get-publickey.html">openssl_get_publickey</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.openssl-pkcs12-export-to-file.html">openssl_pkcs12_export_to_file</a></div> <div class="up"><a href="ref.openssl.html">OpenSSL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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