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>openssl_pkcs7_sign</H1
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><P
>    (PHP 4 &#62;= 4.0.6)</P
>openssl_pkcs7_sign&nbsp;--&nbsp;sign an S/MIME message</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN68288"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>openssl_pkcs7_sign</B
> ( string infilename, string outfilename, mixed signcert, mixed privkey, array headers [, long flags [, string extracertsfilename]])<BR
></BR
><P
>&#13;    <B
CLASS="function"
>openssl_pkcs7_sign()</B
> takes the contents of the file
    named <TT
CLASS="parameter"
><I
>infilename</I
></TT
> and signs them using the
    certificate and it's matching private key specified by
    <TT
CLASS="parameter"
><I
>signcert</I
></TT
> and <TT
CLASS="parameter"
><I
>privkey</I
></TT
>
    parameters.
   </P
><P
><TT
CLASS="parameter"
><I
>headers</I
></TT
> 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
>&#13;    <TT
CLASS="parameter"
><I
>flags</I
></TT
> 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
>&#13;    <TT
CLASS="parameter"
><I
>extracerts</I
></TT
> 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.
   </P
><P
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><B
>Example 1. <B
CLASS="function"
>openssl_pkcs7_sign()</B
> example</B
></P
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><PRE
CLASS="php"
>// the message you want to sign so that recipient can be sure it was you that
// sent it
$data = &#60;&#60;&#60;EOD

You have my authorization to spend $10,000 on dinner expenses.

The CEO
EOD;
// save message to file
$fp = fopen("msg.txt", "w");
fwrite($fp, $data);
fclose($fp);
// encrypt it
if (openssl_pkcs7_sign("msg.txt", "signed.txt", "mycert.pem",
    array("mycert.pem", "mypassphrase"),
    array("To" =&#62; "joes@sales.com", // keyed syntax
          "From: HQ &#60;ceo@sales.com&#62;", // indexed syntax
          "Subject" =&#62; "Eyes only"))
{
    // message signed - send it!
    exec(ini_get("sendmail_path") . " &#60; signed.txt");
}</PRE
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><DIV
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><BLOCKQUOTE
CLASS="note"
><P
><B
>Note: </B
>This function was added in 4.0.6.</P
></BLOCKQUOTE
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