openssl_pkcs7_sign
(PHP 4 >= 4.0.6, PHP 5)
openssl_pkcs7_sign — Sign an S/MIME message
Description
bool openssl_pkcs7_sign
(
string $infilename
,
string $outfilename
,
mixed $signcert
,
mixed $privkey
,
array $headers
[,
int $flags
[,
string $extracerts
]] )
Parameters
-
infilename
-
-
outfilename
-
-
signcert
-
-
privkey
-
-
headers
-
headers
is an array of headers that
will be prepended to the data after it has been signed (see
openssl_pkcs7_encrypt() for more information about
the format of this parameter.
-
flags
-
flags
can be used to alter the output - see PKCS7 constants - if not specified,
it defaults to PKCS7_DETACHED.
-
extracerts
-
extracerts
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.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 openssl_pkcs7_sign() example
<?php
// the message you want to sign so that recipient can be sure it was you that
// sent it
$data = <<<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("file://mycert.pem", "mypassphrase"),
array("To" => "[email protected]", // keyed syntax
"From: HQ <[email protected]>", // indexed syntax
"Subject" => "Eyes only")
)) {
// message signed - send it!
exec(ini_get("sendmail_path") . " < signed.txt");
}
?>
