Sophie: php-manual-pt_BR-5.2.4-1mdv2008.1 noarch

php-manual-pt_BR-5.2.4-1mdv2008.1.noarch.rpm

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>openssl_verify</H1
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><P
>    (PHP 4 &#62;= 4.0.4, PHP 5)</P
>openssl_verify&nbsp;--&nbsp;Verify signature</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN160198"
></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
>&#13;     Returns 1 if the signature is correct, 0 if it is incorrect, and
     -1 on error.
    </P
><P
>&#13;     <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
>Nota: </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
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><B
>Exemplo 1. <B
CLASS="function"
>openssl_verify()</B
> example</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?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 />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"good"</font><font color="#007700">;<br />} elseif (</font><font color="#0000BB">$ok </font><font color="#007700">== </font><font color="#0000BB">0</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"bad"</font><font color="#007700">;<br />} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"ugly, error checking signature"</font><font color="#007700">;<br />}<br /></font><font color="#FF8000">// free the key from memory<br /></font><font color="#0000BB">openssl_free_key</font><font color="#007700">(</font><font color="#0000BB">$pubkeyid</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
    </P
><P
>&#13;     See also <A
HREF="function.openssl-sign.html"
><B
CLASS="function"
>openssl_sign()</B
></A
>.
    </P
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