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# 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]])

openssl_pkcs7_sign() takes the contents of the file named `infilename` and signs them using the certificate and its matching private key specified by `signcert` and `privkey` parameters.

`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` can be used to alter the output - see PKCS7 constants - if not specified, it defaults to PKCS7_DETACHED.

`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.

예 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("mycert.pem", "mypassphrase"),
array("To" => "joes@example.com", // keyed syntax
"From" => "HQ <ceo@example.com>", // indexed syntax
"Subject" => "Eyes only")
)) {
// message signed - send it!
exec(ini_get("sendmail_path") . " < signed.txt");
}
?>`

이전 | 처음으로 | 다음
openssl_pkcs7_encrypt | 위로 | openssl_pkcs7_verify