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>openssl_pkcs7_encrypt</H1
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><P
> (PHP 4 >= 4.0.6, PHP 5)</P
>openssl_pkcs7_encrypt -- Encrypt an S/MIME message</DIV
><DIV
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NAME="AEN163963"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>openssl_pkcs7_encrypt</B
> ( string infile, string outfile, mixed recipcerts, array headers [, int flags [, int cipherid]] )<BR
></BR
><P
> <B
CLASS="function"
>openssl_pkcs7_encrypt()</B
> takes the contents of the
file named <CODE
CLASS="parameter"
>infile</CODE
> and encrypts them using an RC2
40-bit cipher so that they can only be read by the intended recipients
specified by <CODE
CLASS="parameter"
>recipcerts</CODE
>, which is either a
lone X.509 certificate, or an array of X.509 certificates.
<CODE
CLASS="parameter"
>headers</CODE
> is an array of headers that
will be prepended to the data after it has been encrypted.
<CODE
CLASS="parameter"
>flags</CODE
> can be used to specify options that affect
the encoding process - see <A
HREF="ref.openssl.html#openssl.pkcs7.flags"
>PKCS7
constants</A
>.
<CODE
CLASS="parameter"
>headers</CODE
> can be either an associative array
keyed by header name, or an indexed array, where each element contains
a single header line.
Cipher can be selected with <CODE
CLASS="parameter"
>cipherid</CODE
> since PHP 5.
</P
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>例 1. <B
CLASS="function"
>openssl_pkcs7_encrypt()</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 encrypt and send to your secret agent<br />// in the field, known as nighthawk. You have his certificate<br />// in the file nighthawk.pem<br /></font><font color="#0000BB">$data </font><font color="#007700">= <<<EOD<br /></font><font color="#0000BB">Nighthawk,<br /><br />Top secret, for your eyes only!<br /><br />The enemy is closing in! Meet me at the cafe at 8.30am<br />to collect your forged passport!<br /><br />HQ<br /></font><font color="#007700">EOD;<br /><br /></font><font color="#FF8000">// load key<br /></font><font color="#0000BB">$key </font><font color="#007700">= </font><font color="#0000BB">file_get_contents</font><font color="#007700">(</font><font color="#DD0000">"nighthawk.pem"</font><font color="#007700">);<br /><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 /><br /></font><font color="#FF8000">// encrypt it<br /></font><font color="#007700">if (</font><font color="#0000BB">openssl_pkcs7_encrypt</font><font color="#007700">(</font><font color="#DD0000">"msg.txt"</font><font color="#007700">, </font><font color="#DD0000">"enc.txt"</font><font color="#007700">, </font><font color="#0000BB">$key</font><font color="#007700">,<br /> array(</font><font color="#DD0000">"To" </font><font color="#007700">=> </font><font color="#DD0000">"nighthawk@example.com"</font><font color="#007700">, </font><font color="#FF8000">// keyed syntax<br /> </font><font color="#DD0000">"From: HQ <hq@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 /> </font><font color="#FF8000">// message encrypted - 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">" < enc.txt"</font><font color="#007700">);<br />}<br /></font><font color="#0000BB">?></font>
</font>
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