03-08-2002
My apologies...
The 1st code is just a quick example.
It was not fully written. Here's the "correct"
version...
...
if((fd=open(buff, O_RDWR)) < 0)
{
perror(buff);
exit(1);
}
...
...I didn't want to confuse you further.
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LEARN ABOUT PHP
openssl_pkcs7_encrypt
OPENSSL_PKCS7_ENCRYPT(3) 1 OPENSSL_PKCS7_ENCRYPT(3)
openssl_pkcs7_encrypt - Encrypt an S/MIME message
SYNOPSIS
bool openssl_pkcs7_encrypt (string $infile, string $outfile, mixed $recipcerts, array $headers, [int $flags], [int $cipherid =
OPENSSL_CIPHER_RC2_40])
DESCRIPTION
openssl_pkcs7_encrypt(3) 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
o $infile
-
o $outfile
-
o $recipcerts
- Either a lone X.509 certificate, or an array of X.509 certificates.
o $headers
-$headers is an array of headers that will be prepended to the data after it has been encrypted. $headers can be either an asso-
ciative array keyed by header name, or an indexed array, where each element contains a single header line.
o $flags
-$flags can be used to specify options that affect the encoding process - see PKCS7 constants.
o $cipherid
- One of cipher constants.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
openssl_pkcs7_encrypt(3) 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");
}
?>
PHP Documentation Group OPENSSL_PKCS7_ENCRYPT(3)