note 36598 added to function.openssl-pkcs7-encrypt

Using sendmail isn't very portable, and seems daft since PHP has the mail function which will do the job. Problem is how do you use the mail function to send this email, since it's already complete with headers? If you pull in the contents of the file produced by openssl_pkcs7_encrypt and pass this as the message data to the mail command, you end up with an email with two sets of headers (one set from the encrypt function, another added by the mail command). The result is that the second set of headers (which tell the mail client the email is encrypted) get ignored and the (base64 encoded) encrypted mail is shown as-is, rather than being decrypted. The solution is quite simple, but it took me a little while to think of it, so I'm sharing it here. Once you load the contents of the file, split the headers off the body. Then pass the headers as the additional_headers parameter to the mail function, and just the body of the email as the message parameter of the mail function. You will need to specify the to & subject parameters, but these will be overriden in the final email (as delievered to the recipiant) by the ones from the real encrypted email. <?php $pubkey = file_get_contents("cert.pem"); openssl_pkcs7_encrypt("msg.txt", "enc.txt", $pubkey, array("To" => "nighthawk@example.com", "From" => "HQ <hq@example.com>", "Subject" => "Eyes only"), 0) $data = file_get_contents("enc.txt"); // separate header and body, to use with mail function // unfortunate but required, else we have two sets of headers // and the email client doesn't decode the attachment $parts = explode("\n\n", $data, 2); // send mail (headers in the Headers parameter will override those // generated for the To & Subject parameters) mail($mail, $subject, $parts[1], $parts[0]); ?> Richard. ---- Manual Page -- http://www.php.net/manual/en/function.openssl-pkcs7-encrypt.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+36598 Delete -- http://master.php.net/manage/user-notes.php?action=delete+36598&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+36598&report=yes Search -- http://master.php.net/manage/user-notes.php