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22 years ago
I had all kinds of trouble encrypting a message with PGP, but I finanlly got it to work.  The trick was to 'chmod o+r pubring.pkr' so that the apache server could read the public keys!!!  Then, this function worked fine:

<?PHP
function pgp_encrypt($keyring_location, $public_key_id, $plain_text) {

        $key_id = EscapeShellArg($public_key_id);
        putenv("PGPPATH=$keyring_location");

        // encrypt the message
        $pipe = popen("pgpe -r $key_id -af", "r");               
        fwrite($pipe, $plain_text);
        $encrypted_text = '';
        while($s = fgets($pipe, 1024)) {
                // read from the pipe
                $encrypted_text .= $s;
        }
        pclose($pipe);

        return $encrypted_text;
}

$message = pgp_encrypt("/home/username/.pgp", "to@domain.com", "dummy text to be encrypted");
print nl2br($message);

?>
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