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>openssl_pkcs7_sign</H1
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><P
> (PHP 4 >= 4.0.6, PHP 5)</P
>openssl_pkcs7_sign -- sign an S/MIME message</DIV
><DIV
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NAME="AEN85011"
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><H2
>Description</H2
>bool <B
CLASS="methodname"
>openssl_pkcs7_sign</B
> ( string infilename, string outfilename, mixed signcert, mixed privkey, array headers [, int flags [, string extracerts]])<BR
></BR
><P
> <B
CLASS="function"
>openssl_pkcs7_sign()</B
> takes the contents of the file
named <VAR
CLASS="parameter"
>infilename</VAR
> and signs them using the
certificate and its matching private key specified by
<VAR
CLASS="parameter"
>signcert</VAR
> and <VAR
CLASS="parameter"
>privkey</VAR
>
parameters.
</P
><P
><VAR
CLASS="parameter"
>headers</VAR
> is an array of headers that
will be prepended to the data after it has been signed (see
<A
HREF="function.openssl-pkcs7-encrypt.html"
><B
CLASS="function"
>openssl_pkcs7_encrypt()</B
></A
> for more information about
the format of this parameter.
</P
><P
> <VAR
CLASS="parameter"
>flags</VAR
> can be used to alter the output - see <A
HREF="ref.openssl.html#openssl.pkcs7.flags"
>PKCS7 constants</A
> - if not specified,
it defaults to PKCS7_DETACHED.
</P
><P
> <VAR
CLASS="parameter"
>extracerts</VAR
> specifies the name of a file containing
a bunch of extra certificates to include in the signature which can for
example be used to help the recipient to verify the certificate that you used.
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>Exemplu 1. <B
CLASS="function"
>openssl_pkcs7_sign()</B
> example</B
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><code><font color="#000000">
<font color="#0000BB"><?php<br /></font><font color="#FF8000">// the message you want to sign so that recipient can be sure it was you that<br />// sent it<br /></font><font color="#0000BB">$data </font><font color="#007700">= <<<EOD<br /></font><font color="#0000BB"><br />You have my authorization to spend </font><font color="#007700">$</font><font color="#0000BB">10,000 on dinner expenses.<br /><br />The CEO<br /></font><font color="#007700">EOD;<br /></font><font color="#FF8000">// save message to file<br /></font><font color="#0000BB">$fp </font><font color="#007700">= </font><font color="#0000BB">fopen</font><font color="#007700">(</font><font color="#DD0000">"msg.txt"</font><font color="#007700">, </font><font color="#DD0000">"w"</font><font color="#007700">);<br /></font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#0000BB">$data</font><font color="#007700">);<br /></font><font color="#0000BB">fclose</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br /></font><font color="#FF8000">// encrypt it<br /></font><font color="#007700">if (</font><font color="#0000BB">openssl_pkcs7_sign</font><font color="#007700">(</font><font color="#DD0000">"msg.txt"</font><font color="#007700">, </font><font color="#DD0000">"signed.txt"</font><font color="#007700">, </font><font color="#DD0000">"mycert.pem"</font><font color="#007700">,<br /> array(</font><font color="#DD0000">"file://mycert.pem"</font><font color="#007700">, </font><font color="#DD0000">"mypassphrase"</font><font color="#007700">),<br /> array(</font><font color="#DD0000">"To" </font><font color="#007700">=> </font><font color="#DD0000">"joes@example.com"</font><font color="#007700">, </font><font color="#FF8000">// keyed syntax<br /> </font><font color="#DD0000">"From: HQ <ceo@example.com>"</font><font color="#007700">, </font><font color="#FF8000">// indexed syntax<br /> </font><font color="#DD0000">"Subject" </font><font color="#007700">=> </font><font color="#DD0000">"Eyes only"</font><font color="#007700">)<br /> )) {<br /> </font><font color="#FF8000">// message signed - send it!<br /> </font><font color="#0000BB">exec</font><font color="#007700">(</font><font color="#0000BB">ini_get</font><font color="#007700">(</font><font color="#DD0000">"sendmail_path"</font><font color="#007700">) . </font><font color="#DD0000">" < signed.txt"</font><font color="#007700">);<br />}<br /></font><font color="#0000BB">?></font>
</font>
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