Software Certificado, Ajuda!

<?php
# http://www.php.net/manual/pt_BR/book.openssl.php

if (isset($_SERVER['HTTPS']) )
{
echo "SECURE: This page is being accessed through a secure connection.<br><br>";
}
else
{
echo "UNSECURE: This page is being access through an unsecure connection.<br><br>";
}

// Create the keypair
$config = array(
         "digest_alg" => "sha1", /* sha512*/
         "private_key_bits" => 1024,
         "private_key_type" => OPENSSL_KEYTYPE_RSA,
         'x509_extensions' => 'v3_ca'
);
$res=openssl_pkey_new($config);

// Get private key
openssl_pkey_export($res, $privatekey);
echo "Private Key:<BR>$privatekey<br><br>";


// Get public key
$publickey=openssl_pkey_get_details($res);
$publickey=$publickey["key"];

echo "Public Key:<BR>$publickey<BR><BR>";


$cleartext = '2010-05-18;2010-05-18T11:22:19;FAC 001/14;3.12;';
echo "Clear text:<br>$cleartext<BR><BR>";

openssl_public_encrypt($cleartext, $crypttext, $publickey);

echo strlen($crypttext)."<br>";
echo "Crypt text:<br>$crypttext<BR><BR>";

$base64_data = base64_encode($crypttext);
echo strlen($base64_data)."<br>";
echo "Base64 text:<br>$base64_data<BR><BR>";


openssl_private_decrypt($crypttext, $decrypted, $privatekey);
echo strlen($decrypted)."<br>";
echo "Decrypted text:<BR>$decrypted<br><br>";

echo '<br/>';
echo '<br/>';

/*
$pkeyid = openssl_get_privatekey($priv_key);
openssl_sign($assinar,$signature,$pkeyid,"sha1");
return base64_encode($signature);
*/
# http://www.portugal-a-programar.pt/topic/58028-saft-openssl/page__hl__openssl
# http://www.portugal-a-programar.pt/topic/61541-at-questoes-legais/page__hl__openssl
# http://www.portugal-a-programar.pt/topic/61541-at-questoes-legais/page__st__20#entry517850
# http://www.portugal-a-programar.pt/topic/57734-utilizar-webservices-da-at/page__st__760__hl__openssl#entry503022

# GETs PUBLIC KEY object, from PRIVATE KEY
$pubkey = openssl_get_privatekey($privatekey);
# CREATES signature
openssl_sign($cleartext, $signature, $pubkey, "sha1");
# GETs PUBLIC KEYID object from PUBLIC KEY
$pubkeyid = openssl_get_publickey($publickey);

# http://www.portugal-a-programar.pt/topic/63288-at-saft-facturacao-php/#entry532920
$sig64 = base64_encode($signature);
echo strlen($sig64).'<br>';
echo $sig64.'<br>';
# CHECK IF data is VALID
$Result = openssl_verify($cleartext, $signature, $pubkeyid,"sha1");
switch($Result)
{
case 0:
{
echo "ERROR: bad (there's something wrong)\n";
} break;
case 1:
{
echo "SUCESS: signature ok (as it should be)\n";
} break;
default:
{
echo "ERROR: ugly, error checking signature\n";
} break;
}

echo '<br>----------------------------<br><br>';

$dn = array("countryName" => 'XX', "stateOrProvinceName" => 'State', "localityName" => 'SomewhereCity', "organizationName" => 'MySelf', "organizationalUnitName" => 'Whatever', "commonName" => 'mySelf', "emailAddress" => 'user@domain.com');
$privkeypass = '1234';
$numberofdays = 365;

$privkey = openssl_pkey_new($config);
$csr = openssl_csr_new($dn, $privkey);
$sscert = openssl_csr_sign($csr, null, $privkey, $numberofdays);
openssl_x509_export($sscert, $publickey);
openssl_pkey_export($privkey, $privatekey, $privkeypass);
openssl_csr_export($csr, $csrStr);

echo $privatekey.'<br><br>'; // Will hold the exported PriKey
echo $publickey.'<br><br>'; // Will hold the exported PubKey
echo $csrStr.'<br><br>';         // Will hold the exported Certificate
?>