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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_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
#define NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
#include <string>
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "net/base/completion_callback.h"
#include "net/base/io_buffer.h"
#include "net/cert/cert_verify_result.h"
#include "net/socket/client_socket_handle.h"
#include "net/socket/ssl_client_socket.h"
#include "net/ssl/server_bound_cert_service.h"
#include "net/ssl/ssl_config_service.h"
// Avoid including misc OpenSSL headers, i.e.:
// <openssl/bio.h>
typedef struct bio_st BIO;
// <openssl/evp.h>
typedef struct evp_pkey_st EVP_PKEY;
// <openssl/ssl.h>
typedef struct ssl_st SSL;
// <openssl/x509.h>
typedef struct x509_st X509;
namespace net {
class CertVerifier;
class SingleRequestCertVerifier;
class SSLCertRequestInfo;
class SSLInfo;
// An SSL client socket implemented with OpenSSL.
class SSLClientSocketOpenSSL : public SSLClientSocket {
public:
// Takes ownership of the transport_socket, which may already be connected.
// The given hostname will be compared with the name(s) in the server's
// certificate during the SSL handshake. ssl_config specifies the SSL
// settings.
SSLClientSocketOpenSSL(scoped_ptr<ClientSocketHandle> transport_socket,
const HostPortPair& host_and_port,
const SSLConfig& ssl_config,
const SSLClientSocketContext& context);
virtual ~SSLClientSocketOpenSSL();
const HostPortPair& host_and_port() const { return host_and_port_; }
const std::string& ssl_session_cache_shard() const {
return ssl_session_cache_shard_;
}
// SSLClientSocket implementation.
virtual void GetSSLCertRequestInfo(
SSLCertRequestInfo* cert_request_info) OVERRIDE;
virtual NextProtoStatus GetNextProto(std::string* proto,
std::string* server_protos) OVERRIDE;
virtual ServerBoundCertService* GetServerBoundCertService() const OVERRIDE;
// SSLSocket implementation.
virtual int ExportKeyingMaterial(const base::StringPiece& label,
bool has_context,
const base::StringPiece& context,
unsigned char* out,
unsigned int outlen) OVERRIDE;
virtual int GetTLSUniqueChannelBinding(std::string* out) OVERRIDE;
// StreamSocket implementation.
virtual int Connect(const CompletionCallback& callback) OVERRIDE;
virtual void Disconnect() OVERRIDE;
virtual bool IsConnected() const OVERRIDE;
virtual bool IsConnectedAndIdle() const OVERRIDE;
virtual int GetPeerAddress(IPEndPoint* address) const OVERRIDE;
virtual int GetLocalAddress(IPEndPoint* address) const OVERRIDE;
virtual const BoundNetLog& NetLog() const OVERRIDE;
virtual void SetSubresourceSpeculation() OVERRIDE;
virtual void SetOmniboxSpeculation() OVERRIDE;
virtual bool WasEverUsed() const OVERRIDE;
virtual bool UsingTCPFastOpen() const OVERRIDE;
virtual bool GetSSLInfo(SSLInfo* ssl_info) OVERRIDE;
// Socket implementation.
virtual int Read(IOBuffer* buf, int buf_len,
const CompletionCallback& callback) OVERRIDE;
virtual int Write(IOBuffer* buf, int buf_len,
const CompletionCallback& callback) OVERRIDE;
virtual bool SetReceiveBufferSize(int32 size) OVERRIDE;
virtual bool SetSendBufferSize(int32 size) OVERRIDE;
private:
class SSLContext;
friend class SSLClientSocket;
friend class SSLContext;
bool Init();
void DoReadCallback(int result);
void DoWriteCallback(int result);
bool DoTransportIO();
int DoHandshake();
int DoVerifyCert(int result);
int DoVerifyCertComplete(int result);
void DoConnectCallback(int result);
X509Certificate* UpdateServerCert();
void OnHandshakeIOComplete(int result);
void OnSendComplete(int result);
void OnRecvComplete(int result);
int DoHandshakeLoop(int last_io_result);
int DoReadLoop(int result);
int DoWriteLoop(int result);
int DoPayloadRead();
int DoPayloadWrite();
int BufferSend();
int BufferRecv();
void BufferSendComplete(int result);
void BufferRecvComplete(int result);
void TransportWriteComplete(int result);
int TransportReadComplete(int result);
// Callback from the SSL layer that indicates the remote server is requesting
// a certificate for this client.
int ClientCertRequestCallback(SSL* ssl, X509** x509, EVP_PKEY** pkey);
// Callback from the SSL layer that indicates the remote server supports TLS
// Channel IDs.
void ChannelIDRequestCallback(SSL* ssl, EVP_PKEY** pkey);
// Callback from the SSL layer to check which NPN protocol we are supporting
int SelectNextProtoCallback(unsigned char** out, unsigned char* outlen,
const unsigned char* in, unsigned int inlen);
bool transport_send_busy_;
bool transport_recv_busy_;
bool transport_recv_eof_;
scoped_refptr<DrainableIOBuffer> send_buffer_;
scoped_refptr<IOBuffer> recv_buffer_;
CompletionCallback user_connect_callback_;
CompletionCallback user_read_callback_;
CompletionCallback user_write_callback_;
base::WeakPtrFactory<SSLClientSocketOpenSSL> weak_factory_;
// Used by Read function.
scoped_refptr<IOBuffer> user_read_buf_;
int user_read_buf_len_;
// Used by Write function.
scoped_refptr<IOBuffer> user_write_buf_;
int user_write_buf_len_;
// Used by DoPayloadRead() when attempting to fill the caller's buffer with
// as much data as possible without blocking.
// If DoPayloadRead() encounters an error after having read some data, stores
// the result to return on the *next* call to DoPayloadRead(). A value > 0
// indicates there is no pending result, otherwise 0 indicates EOF and < 0
// indicates an error.
int pending_read_error_;
// Used by TransportWriteComplete() and TransportReadComplete() to signify an
// error writing to the transport socket. A value of OK indicates no error.
int transport_write_error_;
// Set when handshake finishes.
scoped_refptr<X509Certificate> server_cert_;
CertVerifyResult server_cert_verify_result_;
bool completed_handshake_;
// Stores client authentication information between ClientAuthHandler and
// GetSSLCertRequestInfo calls.
bool client_auth_cert_needed_;
// List of DER-encoded X.509 DistinguishedName of certificate authorities
// allowed by the server.
std::vector<std::string> cert_authorities_;
CertVerifier* const cert_verifier_;
scoped_ptr<SingleRequestCertVerifier> verifier_;
// The service for retrieving Channel ID keys. May be NULL.
ServerBoundCertService* server_bound_cert_service_;
// OpenSSL stuff
SSL* ssl_;
BIO* transport_bio_;
scoped_ptr<ClientSocketHandle> transport_;
const HostPortPair host_and_port_;
SSLConfig ssl_config_;
// ssl_session_cache_shard_ is an opaque string that partitions the SSL
// session cache. i.e. sessions created with one value will not attempt to
// resume on the socket with a different value.
const std::string ssl_session_cache_shard_;
// Used for session cache diagnostics.
bool trying_cached_session_;
enum State {
STATE_NONE,
STATE_HANDSHAKE,
STATE_VERIFY_CERT,
STATE_VERIFY_CERT_COMPLETE,
};
State next_handshake_state_;
NextProtoStatus npn_status_;
std::string npn_proto_;
std::string server_protos_;
// Written by the |server_bound_cert_service_|.
std::string channel_id_private_key_;
std::string channel_id_cert_;
// The return value of the last call to |server_bound_cert_service_|.
int channel_id_request_return_value_;
// True if channel ID extension was negotiated.
bool channel_id_xtn_negotiated_;
// The request handle for |server_bound_cert_service_|.
ServerBoundCertService::RequestHandle channel_id_request_handle_;
BoundNetLog net_log_;
};
} // namespace net
#endif // NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
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