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// Copyright (c) 2012 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_QUIC_CRYPTO_CLIENT_STREAM_H_
#define NET_QUIC_QUIC_CRYPTO_CLIENT_STREAM_H_
#include <string>
#include "net/quic/crypto/proof_verifier.h"
#include "net/quic/crypto/quic_crypto_client_config.h"
#include "net/quic/quic_config.h"
#include "net/quic/quic_crypto_stream.h"
#include "net/quic/quic_session_key.h"
namespace net {
class QuicSession;
namespace test {
class CryptoTestUtils;
} // namespace test
class NET_EXPORT_PRIVATE QuicCryptoClientStream : public QuicCryptoStream {
public:
class NET_EXPORT_PRIVATE Visitor {
public:
~Visitor() {}
// Called when the proof in |cached| is marked valid. If this is a secure
// QUIC session, then this will happen only after the proof verifier
// completes. If this is an insecure QUIC connection, this will happen
// as soon as a valid config is discovered (either from the cache or
// from the server).
virtual void OnProofValid(
const QuicCryptoClientConfig::CachedState& cached) = 0;
// Called when proof verification details become available, either because
// proof verification is complete, or when cached details are used. This
// will only be called for secure QUIC connections.
virtual void OnProofVerifyDetailsAvailable(
const ProofVerifyDetails& verify_details) = 0;
};
QuicCryptoClientStream(const QuicSessionKey& server_key,
QuicSession* session,
Visitor* visitor,
QuicCryptoClientConfig* crypto_config);
virtual ~QuicCryptoClientStream();
// CryptoFramerVisitorInterface implementation
virtual void OnHandshakeMessage(
const CryptoHandshakeMessage& message) OVERRIDE;
// Performs a crypto handshake with the server. Returns true if the crypto
// handshake is started successfully.
// TODO(agl): this should probably return void.
virtual bool CryptoConnect();
// num_sent_client_hellos returns the number of client hello messages that
// have been sent. If the handshake has completed then this is one greater
// than the number of round-trips needed for the handshake.
int num_sent_client_hellos() const;
Visitor* visitor() { return visitor_; }
private:
// ProofVerifierCallbackImpl is passed as the callback method to VerifyProof.
// The ProofVerifier calls this class with the result of proof verification
// when verification is performed asynchronously.
class ProofVerifierCallbackImpl : public ProofVerifierCallback {
public:
explicit ProofVerifierCallbackImpl(QuicCryptoClientStream* stream);
virtual ~ProofVerifierCallbackImpl();
// ProofVerifierCallback interface.
virtual void Run(bool ok,
const string& error_details,
scoped_ptr<ProofVerifyDetails>* details) OVERRIDE;
// Cancel causes any future callbacks to be ignored. It must be called on
// the same thread as the callback will be made on.
void Cancel();
private:
QuicCryptoClientStream* stream_;
};
friend class test::CryptoTestUtils;
friend class ProofVerifierCallbackImpl;
enum State {
STATE_IDLE,
STATE_INITIALIZE,
STATE_SEND_CHLO,
STATE_RECV_REJ,
STATE_VERIFY_PROOF,
STATE_VERIFY_PROOF_COMPLETE,
STATE_RECV_SHLO,
};
// DoHandshakeLoop performs a step of the handshake state machine. Note that
// |in| may be NULL if the call did not result from a received message.
void DoHandshakeLoop(const CryptoHandshakeMessage* in);
// Called to set the proof of |cache| valid. Also invokes the visitor's
// OnProofValid() method.
void SetProofValid(QuicCryptoClientConfig::CachedState* cached);
Visitor* visitor_;
State next_state_;
// num_client_hellos_ contains the number of client hello messages that this
// connection has sent.
int num_client_hellos_;
QuicCryptoClientConfig* const crypto_config_;
// Client's connection nonce (4-byte timestamp + 28 random bytes)
std::string nonce_;
// Server's (hostname, port, is_https) tuple.
const QuicSessionKey server_key_;
// Generation counter from QuicCryptoClientConfig's CachedState.
uint64 generation_counter_;
// proof_verify_callback_ contains the callback object that we passed to an
// asynchronous proof verification. The ProofVerifier owns this object.
ProofVerifierCallbackImpl* proof_verify_callback_;
// These members are used to store the result of an asynchronous proof
// verification. These members must not be used after
// STATE_VERIFY_PROOF_COMPLETE.
bool verify_ok_;
string verify_error_details_;
scoped_ptr<ProofVerifyDetails> verify_details_;
DISALLOW_COPY_AND_ASSIGN(QuicCryptoClientStream);
};
} // namespace net
#endif // NET_QUIC_QUIC_CRYPTO_CLIENT_STREAM_H_
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