<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >openssl_verify</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="OpenSSL Functions" HREF="ref.openssl.html"><LINK REL="PREVIOUS" TITLE="openssl_sign" HREF="function.openssl-sign.html"><LINK REL="NEXT" TITLE="openssl_x509_check_private_key" HREF="function.openssl-x509-check-private-key.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.openssl-sign.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.openssl-x509-check-private-key.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.openssl-verify" ></A >openssl_verify</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN164498" ></A ><P > (PHP 4 >= 4.0.4, PHP 5)</P >openssl_verify -- Verify signature</DIV ><DIV CLASS="refsect1" ><A NAME="AEN164501" ></A ><H2 >Description</H2 >int <B CLASS="methodname" >openssl_verify</B > ( string data, string signature, mixed pub_key_id [, int signature_alg] )<BR ></BR ><P > Returns 1 if the signature is correct, 0 if it is incorrect, and -1 on error. </P ><P > <B CLASS="function" >openssl_verify()</B > verifies that the <CODE CLASS="parameter" >signature</CODE > is correct for the specified <CODE CLASS="parameter" >data</CODE > using the public key associated with <CODE CLASS="parameter" >pub_key_id</CODE >. This must be the public key corresponding to the private key used for signing. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > Optional 4th parameter <CODE CLASS="parameter" >signature_alg</CODE > was added in version 5.2.0. Its default value is <TT CLASS="constant" ><B >OPENSSL_ALGO_SHA1</B ></TT >. For more information see the list of <A HREF="ref.openssl.html#openssl.signature-algos" >Signature Algorithms</A >. </P ></BLOCKQUOTE ></DIV ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN164530" ></A ><P ><B >例 1. <B CLASS="function" >openssl_verify()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#FF8000">// $data and $signature are assumed to contain the data and the signature<br /><br />// fetch public key from certificate and ready it<br /></font><font color="#0000BB">$fp </font><font color="#007700">= </font><font color="#0000BB">fopen</font><font color="#007700">(</font><font color="#DD0000">"/src/openssl-0.9.6/demos/sign/cert.pem"</font><font color="#007700">, </font><font color="#DD0000">"r"</font><font color="#007700">);<br /></font><font color="#0000BB">$cert </font><font color="#007700">= </font><font color="#0000BB">fread</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#0000BB">8192</font><font color="#007700">);<br /></font><font color="#0000BB">fclose</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br /></font><font color="#0000BB">$pubkeyid </font><font color="#007700">= </font><font color="#0000BB">openssl_get_publickey</font><font color="#007700">(</font><font color="#0000BB">$cert</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// state whether signature is okay or not<br /></font><font color="#0000BB">$ok </font><font color="#007700">= </font><font color="#0000BB">openssl_verify</font><font color="#007700">(</font><font color="#0000BB">$data</font><font color="#007700">, </font><font color="#0000BB">$signature</font><font color="#007700">, </font><font color="#0000BB">$pubkeyid</font><font color="#007700">);<br />if (</font><font color="#0000BB">$ok </font><font color="#007700">== </font><font color="#0000BB">1</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"good"</font><font color="#007700">;<br />} elseif (</font><font color="#0000BB">$ok </font><font color="#007700">== </font><font color="#0000BB">0</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"bad"</font><font color="#007700">;<br />} else {<br /> echo </font><font color="#DD0000">"ugly, error checking signature"</font><font color="#007700">;<br />}<br /></font><font color="#FF8000">// free the key from memory<br /></font><font color="#0000BB">openssl_free_key</font><font color="#007700">(</font><font color="#0000BB">$pubkeyid</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > See also <A HREF="function.openssl-sign.html" ><B CLASS="function" >openssl_sign()</B ></A >. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.openssl-sign.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.openssl-x509-check-private-key.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >openssl_sign</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.openssl.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >openssl_x509_check_private_key</TD ></TR ></TABLE ></DIV ></BODY ></HTML >