Php/docs/function.openssl-pkcs7-encrypt
openssl_pkcs7_encrypt
(PHP 4 >= 4.0.6, PHP 5, PHP 7)
openssl_pkcs7_encrypt — Encrypt an S/MIME message
Description
openssl_pkcs7_encrypt
( string $infile
, string $outfile
, mixed $recipcerts
, array $headers
[, int $flags
= 0
[, int $cipherid
= OPENSSL_CIPHER_RC2_40
]] ) : bool
openssl_pkcs7_encrypt() takes the contents of the
file named infile
and encrypts them using an RC2
40-bit cipher so that they can only be read by the intended recipients
specified by recipcerts
.
Parameters
infile
outfile
recipcerts
Either a lone X.509 certificate, or an array of X.509 certificates.
headers
headers
is an array of headers that will be prepended to the data after it has been encrypted.headers
can be either an associative array keyed by header name, or an indexed array, where each element contains a single header line.flags
flags
can be used to specify options that affect the encoding process - see PKCS7 constants.cipherid
One of cipher constants.
Return Values
Returns TRUE
on success or FALSE
on failure.
Examples
Example #1 openssl_pkcs7_encrypt() example
<?php// the message you want to encrypt and send to your secret agent// in the field, known as nighthawk. You have his certificate// in the file nighthawk.pem$data = <<<EODNighthawk,Top secret, for your eyes only!The enemy is closing in! Meet me at the cafe at 8.30amto collect your forged passport!HQEOD;// load key$key = file_get_contents("nighthawk.pem");// save message to file$fp = fopen("msg.txt", "w");fwrite($fp, $data);fclose($fp);// encrypt itif (openssl_pkcs7_encrypt("msg.txt", "enc.txt", $key, array("To" => "[email protected]", // keyed syntax "From: HQ <[email protected]>", // indexed syntax "Subject" => "Eyes only"))) { // message encrypted - send it! exec(ini_get("sendmail_path") . " < enc.txt");}?>