<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Open sealed data</title> </head> <body><div class="manualnavbar" 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-pbkdf2.html">openssl_pbkdf2</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" id="refsect1-function.openssl-open-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><strong>openssl_open</strong></span> ( <span class="methodparam"><span class="type">string</span> <code class="parameter">$sealed_data</code></span> , <span class="methodparam"><span class="type">string</span> <code class="parameter reference">&$open_data</code></span> , <span class="methodparam"><span class="type">string</span> <code class="parameter">$env_key</code></span> , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$priv_key_id</code></span> [, <span class="methodparam"><span class="type">string</span> <code class="parameter">$method</code></span> ] )</div> <p class="para rdfs-comment"> <span class="function"><strong>openssl_open()</strong></span> opens (decrypts) <em><code class="parameter">sealed_data</code></em> using the private key associated with the key identifier <em><code class="parameter">priv_key_id</code></em> and the envelope key <em><code class="parameter">env_key</code></em>, and fills <em><code class="parameter">open_data</code></em> 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 <span class="function"><a href="function.openssl-seal.html" class="function">openssl_seal()</a></span> for more information. </p> </div> <div class="refsect1 parameters" id="refsect1-function.openssl-open-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">sealed_data</code></em></span> <dd> <p class="para"> </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">open_data</code></em></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"><em><code class="parameter">env_key</code></em></span> <dd> <p class="para"> </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">priv_key_id</code></em></span> <dd> <p class="para"> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.openssl-open-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure. </p> </div> <div class="refsect1 examples" id="refsect1-function.openssl-open-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-864"> <p><strong>Example #1 <span class="function"><strong>openssl_open()</strong></span> example</strong></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" id="refsect1-function.openssl-open-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.openssl-seal.html" class="function" rel="rdfs-seeAlso">openssl_seal()</a> - Seal (encrypt) data</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" 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-pbkdf2.html">openssl_pbkdf2</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>