}
}
}
echo "<tr><td>PHP_VERSION</td><td>" . (version_compare(PHP_VERSION, '4.2.0', '>=') ? '>=4.2.0' : '<4.2.0') . '</td></tr>';
echo "<tr><td>openssl</td><td>" . (extension_loaded('openssl') ? 'extension loaded' : 'extension not loaded') . '</td></tr>';
echo "<tr><td>openssl_pkey_get_details</td><td>" . (function_exists('openssl_pkey_get_details') ? 'exists' : 'doesn\'t exist') . '</td></tr>';
echo "<tr><td>Private key</td><td>" . ($privateKey != '' ? 'Found' : 'Not found') . '</td></tr>';
echo "<tr><td>Public key</td><td>" . ($publicKey != '' ? 'Found' : 'Not found') . '</td></tr>';
echo "<tr><td>OpenSSL Library</td><td>" . (isset($versions['Library']) ? $versions['Library'] : 'Not found') . '</td></tr>';
echo "<tr><td>OpenSSL Header</td><td>" . (isset($versions['Header']) ? $versions['Header'] : 'Not found') . '</td></tr>';
$rsa = new \phpseclib\Crypt\RSA();
echo "<tr><td>CRYPT_RSA_MODE</td><td>" . (CRYPT_RSA_MODE == 1 ? 'MODE_INTERNAL' : 'MODE_OPENSSL') . '</td></tr>';
$rsa->setEncryptionMode(phpseclib\Crypt\RSA::ENCRYPTION_PKCS1);
$plaintext = 'Jorani is the best open source Leave Management System';
$rsa->loadKey($publicKey);
$ciphertext = $rsa->encrypt($plaintext);
$rsa->loadKey($privateKey, phpseclib\Crypt\RSA::PRIVATE_FORMAT_PKCS1);
$time_start = microtime(true);
echo "<tr><td>Decrypted message</td><td>" . $rsa->decrypt($ciphertext) . '</td></tr>';
$time_end = microtime(true);
$time = $time_end - $time_start;
echo "<tr><td>Decryption speed</td><td>" . $time . '</td></tr>';
//Generate public and private keys for a single usage
extract($rsa->createKey(KEY_SIZE));
?>
</tbody>
</table>
<h2 id="pair">Private and public key pair</h2>
<p>This section will help you to create <code>assets/keys/private.pem</code> and <code>assets/keys/public.pem</code> files.
/**
* Encriptar datos con la clave pública
*
* @param string $data los datos a encriptar
* @return string
*/
public function encryptRSA($data)
{
$Rsa = new \phpseclib\Crypt\RSA();
$Rsa->setEncryptionMode(\phpseclib\Crypt\RSA::ENCRYPTION_PKCS1);
$Rsa->loadKey($this->getPublicKey());
return $Rsa->encrypt($data);
}
public function encrypt()
{
$rsa = new \phpseclib\Crypt\RSA();
$rsa->loadKey($this->key);
$plaintext = file_get_contents($this->getFileUploadDir() . '/' . $this->file_name);
$ciphertext = $rsa->encrypt($plaintext);
$hash = md5($plaintext);
$this->save_name = 'EncryptedFile_' . $hash;
file_put_contents($this->getFileRootDir() . '/' . $this->save_name, $ciphertext);
unlink($this->file->getPathname());
return new CryptoFile($hash, $this->getWebPath() . '/' . $this->save_name);
}
$private = file_get_contents('private.pem');
//This private key is password protected, so load key
$rsa_private->setPassword($password);
//load the private key
$rsa_private->load($private);
//set hash (I chose sha512 because sha1 apparently has collisions)
$rsa_private->setHash('sha512');
//set MGF hash
$rsa_private->setMGFHash('sha512');
//Create new RSA Object - public key
$rsa_public = new \phpseclib\Crypt\RSA();
//Get public key (in this case content of file)
$public = file_get_contents('public.pem');
//load the public key
$rsa_public->load($public);
//set hash
$rsa_public->setHash('sha512');
//set MGF hash
$rsa_public->setMGFHash('sha512');
echo 'Plaintext: ' . $plaintext . PHP_EOL;
//encrypt with public key and OAEP as padding
$ciphertext_raw = $rsa_public->encrypt($plaintext, phpseclib\Crypt\RSA::PADDING_OAEP);
echo 'Ciphertext (RAW): ' . $ciphertext_raw . PHP_EOL;
//Encode as base64 for better management
$ciphertext = base64_encode($ciphertext_raw);
echo 'Ciphertext (base64): ' . $ciphertext . PHP_EOL;
//Decode from base64 then decrypt with private key
$decrypted = $rsa_private->decrypt(base64_decode($ciphertext));
echo 'Decrypted: ' . $decrypted . PHP_EOL;
//Is everything ok?
var_dump($plaintext == $decrypted);