Ubuntu

generateIv(); if (file_exists(WC_ETRANSACTIONS_KEY_PATH)) { unlink(WC_ETRANSACTIONS_KEY_PATH); } $key_hex = bin2hex($key); return file_put_contents(WC_ETRANSACTIONS_KEY_PATH, "generateKey(); $_POST['KEY_ERROR'] = esc_html__("For some reason, the key has just been generated. please reenter the HMAC key to crypt it.", WC_ETRANSACTIONS_PLUGIN); } $key_content = file_get_contents(WC_ETRANSACTIONS_KEY_PATH); $key = substr($key_content, 5, 32); // Extract the key part return $key; } /** * Get the IV */ private function getIv() { if (!file_exists(WC_ETRANSACTIONS_KEY_PATH)) { $this->generateKey(); $_POST['KEY_ERROR'] = esc_html__("For some reason, the key has just been generated. please reenter the HMAC key to crypt it.", WC_ETRANSACTIONS_PLUGIN); } $iv_content = file_get_contents(WC_ETRANSACTIONS_KEY_PATH); $iv = substr($iv_content, 37, 16); // Extract the IV part return $iv; } /** * Encrypt data */ private function encryptData($key, $iv, $data) { return base64_encode(openssl_encrypt($data, 'aes-128-cbc', $key, OPENSSL_RAW_DATA, $iv)); } /** * Encrypt $data using AES * @param string $data The data to encrypt * @return string The result of encryption */ public function encrypt($data) { if (empty($data)) { return ''; } $data = base64_encode($data); $key = $this->getKey(); $key = substr($key, 0, 24); while (strlen($key) < 24) { $key .= substr($key, 0, 24 - strlen($key)); } $iv = $this->getIv(); return $this->encryptData($key, $iv, $data); } /** * Decrypt data */ private function decryptData($key, $iv, $data) { $result = openssl_decrypt($data, 'aes-128-cbc', $key, OPENSSL_RAW_DATA, $iv); if ($result === false) { throw new Exception("Decryption failed. Please reinitialize the HMAC key."); } return base64_decode($result); } /** * Decrypt $data using AES * @param string $data The data to decrypt * @return string The result of decryption */ public function decrypt($data) { if (empty($data)) { return ''; } $data = base64_decode($data); $key = $this->getKey(); $key = substr($key, 0, 24); while (strlen($key) < 24) { $key .= substr($key, 0, 24 - strlen($key)); } $iv = $this->getIv(); $result = $this->decryptData($key, $iv, $data); $result = rtrim($result, "\0"); return $result; } }