chromium/components/client_update_protocol/ecdsa.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_CLIENT_UPDATE_PROTOCOL_ECDSA_H_
#define COMPONENTS_CLIENT_UPDATE_PROTOCOL_ECDSA_H_

#include <stdint.h>

#include <memory>
#include <string>
#include <string_view>
#include <vector>

namespace client_update_protocol {

// Client Update Protocol v2, or CUP-ECDSA, is used by Google Update (Omaha)
// servers to ensure freshness and authenticity of server responses over HTTP,
// without the overhead of HTTPS -- namely, no PKI, no guarantee of privacy, and
// no request replay protection.
//
// CUP-ECDSA relies on a single signing operation using ECDSA with SHA-256,
// instead of the original CUP which used HMAC-SHA1 with a random signing key
// encrypted using RSA.
//
// Each |Ecdsa| object represents a single network ping in flight -- a call to
// SignRequest() generates internal state that will be used by
// ValidateResponse().
class Ecdsa { … };

}  // namespace client_update_protocol

#endif  // COMPONENTS_CLIENT_UPDATE_PROTOCOL_ECDSA_H_