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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_QUIC_CRYPTO_CHANNEL_ID_H_
#define NET_QUIC_CRYPTO_CHANNEL_ID_H_
#include <string>
#include "base/strings/string_piece.h"
#include "net/base/net_export.h"
namespace net {
// ChannelIDSigner is an abstract interface that implements signing by
// ChannelID keys.
class NET_EXPORT_PRIVATE ChannelIDSigner {
public:
virtual ~ChannelIDSigner() { }
// Sign signs |signed_data| using the ChannelID key for |hostname| and puts
// the serialized public key into |out_key| and the signature into
// |out_signature|. It returns true on success.
virtual bool Sign(const std::string& hostname,
base::StringPiece signed_data,
std::string* out_key,
std::string* out_signature) = 0;
// GetKeyForHostname returns the ChannelID key that |ChannelIDSigner| will use
// for the given hostname.
virtual std::string GetKeyForHostname(const std::string& hostname) = 0;
};
// ChannelIDVerifier verifies ChannelID signatures.
class NET_EXPORT_PRIVATE ChannelIDVerifier {
public:
// kContextStr is prepended to the data to be signed in order to ensure that
// a ChannelID signature cannot be used in a different context. (The
// terminating NUL byte is inclued.)
static const char kContextStr[];
// kClientToServerStr follows kContextStr to specify that the ChannelID is
// being used in the client to server direction. (The terminating NUL byte is
// included.)
static const char kClientToServerStr[];
// Verify returns true iff |signature| is a valid signature of |signed_data|
// by |key|.
static bool Verify(base::StringPiece key,
base::StringPiece signed_data,
base::StringPiece signature);
// FOR TESTING ONLY: VerifyRaw returns true iff |signature| is a valid
// signature of |signed_data| by |key|. |is_channel_id_signature| indicates
// whether |signature| is a ChannelID signature (with kContextStr prepended
// to the data to be signed).
static bool VerifyRaw(base::StringPiece key,
base::StringPiece signed_data,
base::StringPiece signature,
bool is_channel_id_signature);
};
} // namespace net
#endif // NET_QUIC_CRYPTO_CHANNEL_ID_H_
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