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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.
#include "net/quic/quic_crypto_server_stream.h"
#include "net/quic/crypto/crypto_protocol.h"
#include "net/quic/crypto/crypto_server_config.h"
#include "net/quic/crypto/crypto_utils.h"
#include "net/quic/quic_config.h"
#include "net/quic/quic_protocol.h"
#include "net/quic/quic_session.h"
namespace net {
QuicCryptoServerStream::QuicCryptoServerStream(
const QuicCryptoServerConfig& crypto_config,
QuicSession* session)
: QuicCryptoStream(session),
crypto_config_(crypto_config) {
}
QuicCryptoServerStream::~QuicCryptoServerStream() {
}
void QuicCryptoServerStream::OnHandshakeMessage(
const CryptoHandshakeMessage& message) {
// Do not process handshake messages after the handshake is confirmed.
if (handshake_confirmed_) {
CloseConnection(QUIC_CRYPTO_MESSAGE_AFTER_HANDSHAKE_COMPLETE);
return;
}
if (message.tag() != kCHLO) {
CloseConnection(QUIC_INVALID_CRYPTO_MESSAGE_TYPE);
return;
}
string error_details;
CryptoHandshakeMessage reply;
QuicErrorCode error = crypto_config_.ProcessClientHello(
message, session()->connection()->guid(),
session()->connection()->peer_address(),
session()->connection()->clock(),
session()->connection()->random_generator(),
&crypto_negotiated_params_, &reply, &error_details);
if (error != QUIC_NO_ERROR) {
CloseConnectionWithDetails(error, error_details);
return;
}
if (reply.tag() != kSHLO) {
SendHandshakeMessage(reply);
return;
}
// If we are returning a SHLO then we accepted the handshake.
QuicConfig* config = session()->config();
error = config->ProcessClientHello(message, &error_details);
if (error != QUIC_NO_ERROR) {
CloseConnectionWithDetails(error, error_details);
return;
}
config->ToHandshakeMessage(&reply);
// Receiving a full CHLO implies the client is prepared to decrypt with
// the new server write key. We can start to encrypt with the new server
// write key.
//
// NOTE: the SHLO will be encrypted with the new server write key.
session()->connection()->SetEncrypter(
ENCRYPTION_INITIAL,
crypto_negotiated_params_.initial_crypters.encrypter.release());
session()->connection()->SetDefaultEncryptionLevel(
ENCRYPTION_INITIAL);
// Set the decrypter immediately so that we no longer accept unencrypted
// packets.
session()->connection()->SetDecrypter(
crypto_negotiated_params_.initial_crypters.decrypter.release());
SendHandshakeMessage(reply);
session()->connection()->SetEncrypter(
ENCRYPTION_FORWARD_SECURE,
crypto_negotiated_params_.forward_secure_crypters.encrypter.release());
session()->connection()->SetDefaultEncryptionLevel(
ENCRYPTION_FORWARD_SECURE);
session()->connection()->SetAlternativeDecrypter(
crypto_negotiated_params_.forward_secure_crypters.decrypter.release(),
false /* don't latch */);
encryption_established_ = true;
handshake_confirmed_ = true;
session()->OnCryptoHandshakeEvent(QuicSession::HANDSHAKE_CONFIRMED);
}
} // namespace net
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