File Content: wfCrypt.php <?php class wfCrypt { private static function getPubKey(){ #Command to generate our keypair was: openssl req -x509 -newkey rsa:2048 -keyout mycert.key -out mycert.pem -nodes -subj "/C=US/ST=Washington/L=Seattle/O=Wordfence/OU=IT/CN=wordfence.com" -days 7300 #This is a 2048 bit key using SHA256 with RSA. $key = <<<ENDKEY -----BEGIN CERTIFICATE----- MIIDrTCCApWgAwIBAgIJAIg6Va5tcvwyMA0GCSqGSIb3DQEBCwUAMG0xCzAJBgNV BAYTAlVTMRMwEQYDVQQIDApXYXNoaW5ndG9uMRAwDgYDVQQHDAdTZWF0dGxlMRIw EAYDVQQKDAlXb3JkZmVuY2UxCzAJBgNVBAsMAklUMRYwFAYDVQQDDA13b3JkZmVu Y2UuY29tMB4XDTE1MDMxMjA1NTIzMFoXDTM1MDMwNzA1NTIzMFowbTELMAkGA1UE BhMCVVMxEzARBgNVBAgMCldhc2hpbmd0b24xEDAOBgNVBAcMB1NlYXR0bGUxEjAQ BgNVBAoMCVdvcmRmZW5jZTELMAkGA1UECwwCSVQxFjAUBgNVBAMMDXdvcmRmZW5j ZS5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC/9Ogj1PIQsuZu dTUNWlG0zaDNWpeY1ZiB/6oBS/YXkGFuG8R/nZ/kYsRmBm6yRp/3jC/HiPjg+7Zc bA/CKoHdUlNjFZ+10DmS369wVX+c0oV9f720b/a0xN0qeKxJTiN2NsAl5szYv2CQ Bvzjeb5VfKgrfV9tgYr38swudxvexponYaK0OlDL3u/Xca4SLRKmB+ZYCcZJttoG SNFsQMlLHWWmM0FJH9qZ3x8MtRM5KsNEWO+/op511Rr36ZnLJdzUnETsaxHKwuCv 0+D9b0mwk8K/c67l63v4+zywXNkdYIslgo7Aeeyb6t0lyyfruXutEyMinmApACT2 sDMAbYk7AgMBAAGjUDBOMB0GA1UdDgQWBBTstr/AoPQyLLIt4/peFSjj0FFXHzAf BgNVHSMEGDAWgBTstr/AoPQyLLIt4/peFSjj0FFXHzAMBgNVHRMEBTADAQH/MA0G CSqGSIb3DQEBCwUAA4IBAQA9HsK+XdZh2MGP2SDdggA+MxkNBCCFBtcsmQrpiLUW 67xt59FPRMwTgSA9Lt8uqcWaXoHXiaTnXTRtN/BKZR0F71HQfiV6zy511blIRlk2 nV+vYzwLUENCZ31hQEZsY+uYqBSTiHecUKohn8A9pOOEpis2YEn2zVo4cobdyGa1 zCnaAN99KT8s9lOO0UW0J52qZhvv4y8YhELtrXKBsFatGEsVIM0NFI+ZDsNpMnSQ cmUtLiIJtk5hxNbOaIz2vzbOkbzJ3ehzODJ1X5rya7X0v2akLLhwP9jqz5ua6ttP duLv4Q6v3LY6pwDoyKQMDqNNxVjaFmx5HyFWRPofpu/T -----END CERTIFICATE----- ENDKEY; return $key; } public static function makeSymHexKey($length){ return bin2hex(wfWAFUtils::random_bytes($length / 2)); } public static function pubCrypt($symKey){ //encrypts a symmetric key and returns it base64 openssl_public_encrypt($symKey, $encSymKey, self::getPubKey(), OPENSSL_PKCS1_OAEP_PADDING); //The default OPENSSL_PKCS1_PADDING is deprecated. return base64_encode($encSymKey); } /** * Returns the payload symmetrically encrypted and signed by the noc1 public key. The payload is converted to JSON, * encrypted using a randomly-generated symmetric key, and then hashed and signed with the noc1 public key. * * This is NOT cryptographically secure for verifying that this server sent or was aware of the context of the * message, rather it is intended to be used in tandem with verification via another method (e.g., a call that * validates due to the site URL matching the license key or noc1 does a call itself to the server to retrieve the * encrypted payload). It is solely a means to provide data to noc1 that only it can read. * * @param array $payload * @return array The encrypted and signed payload in the form array('message' => <encrypted message in hex>, 'signature' => <signature in hex>). */ public static function noc1_encrypt($payload) { $payloadJSON = json_encode($payload); $keyData = file_get_contents(dirname(__FILE__) . '/noc1.key'); $key = @openssl_get_publickey($keyData); if ($key !== false) { $symmetricKey = wfWAFUtils::random_bytes(32); $iv = wfWAFUtils::random_bytes(16); $encrypted = @openssl_encrypt($payloadJSON, 'aes-256-cbc', $symmetricKey, OPENSSL_RAW_DATA, $iv); if ($encrypted !== false) { $success = openssl_public_encrypt($symmetricKey, $symmetricKeyEncrypted, $key, OPENSSL_PKCS1_OAEP_PADDING); if ($success) { $message = $iv . $symmetricKeyEncrypted . $encrypted; $signatureRaw = hash('sha256', $message, true); $success = openssl_public_encrypt($signatureRaw, $signature, $key, OPENSSL_PKCS1_OAEP_PADDING); if ($success) { $package = array('message' => bin2hex($message), 'signature' => bin2hex($signature)); return $package; } } } } return array(); } /** * Returns a SHA256 HMAC for $payload using the local long key. * * @param $payload * @return false|string */ public static function local_sign($payload) { return hash_hmac('sha256', $payload, wfConfig::get('longEncKey')); } } Submit