   #PHP Manual OpenSSL functions openssl_pkcs7_decrypt openssl_pkcs7_sign

   PHP Manual
   Prev  Next
   ______________________________________________________________________

                             openssl_pkcs7_encrypt

   (PHP 4 >= 4.0.6)
   openssl_pkcs7_encrypt -- Encrypt an S/MIME message

Description

   bool openssl_pkcs7_encrypt ( string infile, string outfile, mixed
   recipcerts, array headers [, int flags])

   openssl_pkcs7_encrypt() takes the contents of the file named infile
   and encrypts them using an RC2 40-bit cipher so that they can only be
   read by the intended recipients specified by recipcerts, which is
   either a lone X.509 certificate, or an array of X.509 certificates.
   headers is an array of headers that will be prepended to the data
   after it has been encrypted. flags can be used to specify options that
   affect the encoding process - see PKCS7 constants. headers can be
   either an associative array keyed by header name, or an indexed array,
   where each element contains a single header line.

   Example 1. openssl_pkcs7_encrypt() example
   <?php
   // the message you want to encrypt and send to your secret agent
   // in the field, known as nighthawk.  You have his certificate
   // in the file nighthawk.pem
   $data = <<<EOD
   Nighthawk,
   Top secret, for your eyes only!
   The enemy is closing in! Meet me at the cafe at 8.30am
   to collect your forged passport!
   HQ
   EOD;
   // load key
   $key = file_get_contents("nighthawk.pem");
   // save message to file
   $fp = fopen("msg.txt", "w");
   fwrite($fp, $data);
   fclose($fp);
   // encrypt it
   if (openssl_pkcs7_encrypt("msg.txt", "enc.txt", $key,
       array("To" => "nighthawk@example.com", // keyed syntax
             "From: HQ <hq@example.com>", // indexed syntax
             "Subject" => "Eyes only"))) {
       // message encrypted - send it!
       exec(ini_get("sendmail_path") . " < enc.txt");
   }
   ?>
   ______________________________________________________________________

   Prev                  Home               Next
   openssl_pkcs7_decrypt  Up  openssl_pkcs7_sign
