📄 function.openssl-pkcs7-verify.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>Verifies the signature of an S/MIME signed message</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-pkcs7-sign.html">openssl_pkcs7_sign</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.openssl-pkey-export-to-file.html">openssl_pkey_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-pkcs7-verify" class="refentry"> <div class="refnamediv"> <h1 class="refname">openssl_pkcs7_verify</h1> <p class="verinfo">(PHP 4 >= 4.0.6, PHP 5)</p><p class="refpurpose"><span class="refname">openssl_pkcs7_verify</span> — <span class="dc-title">Verifies the signature of an S/MIME signed message</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><b><b>openssl_pkcs7_verify</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$filename</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$flags</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$outfilename</tt></span> [, <span class="methodparam"><span class="type">array</span> <tt class="parameter">$cainfo</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$extracerts</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$content</tt></span> ]]]] )</div> <p class="para rdfs-comment"> <b>openssl_pkcs7_verify()</b> reads the S/MIME message contained in the given file and examines the digital signature. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">filename</tt></i></span> <dd> <p class="para"> Path to the message. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">flags</tt></i></span> <dd> <p class="para"> <i><tt class="parameter">flags</tt></i> can be used to affect how the signature is verified - see <a href="openssl.pkcs7.flags.html" class="link">PKCS7 constants</a> for more information. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">outfilename</tt></i></span> <dd> <p class="para"> If the <i><tt class="parameter">outfilename</tt></i> is specified, it should be a string holding the name of a file into which the certificates of the persons that signed the messages will be stored in PEM format. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">cainfo</tt></i></span> <dd> <p class="para"> If the <i><tt class="parameter">cainfo</tt></i> is specified, it should hold information about the trusted CA certificates to use in the verification process - see <a href="openssl.cert.verification.html" class="link">certificate verification</a> for more information about this parameter. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">extracerts</tt></i></span> <dd> <p class="para"> If the <i><tt class="parameter">extracerts</tt></i> is specified, it is the filename of a file containing a bunch of certificates to use as untrusted CAs. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">content</tt></i></span> <dd> <p class="para"> You can specify a filename with <i><tt class="parameter">content</tt></i> that will be filled with the verified data, but with the signature information stripped. </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> if the signature is verified, <b><tt>FALSE</tt></b> if it is not correct (the message has been tampered with, or the signing certificate is invalid), or -1 on error. </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">5.1.0</td> <td colspan="1" rowspan="1" align="left"> The <i><tt class="parameter">content</tt></i> parameter was added. </td> </tr> </tbody> </colgroup> </table> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; 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