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/*
Copyright (C) 2009 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _H_REDPEER
#define _H_REDPEER
#include <openssl/ssl.h>
#include <openssl/err.h>
#include "common.h"
#include <spice/protocol.h>
#include "process_loop.h"
#include "threads.h"
#include "platform_utils.h"
class RedPeer: protected EventSources::Socket {
public:
RedPeer();
virtual ~RedPeer();
class InMessage;
class CompundInMessage;
class OutMessage;
class DisconnectedException {};
class HostAuthOptions {
public:
enum Type {
HOST_AUTH_OP_PUBKEY = 1,
HOST_AUTH_OP_NAME = (1 << 1),
HOST_AUTH_OP_SUBJECT = (1 << 2),
};
typedef std::vector<uint8_t> PublicKey;
typedef std::pair<std::string, std::string> CertFieldValuePair;
typedef std::list<CertFieldValuePair> CertFieldValueList;
HostAuthOptions() : type_flags(0) {}
public:
int type_flags;
PublicKey host_pubkey;
CertFieldValueList host_subject;
std::string CA_file;
};
class ConnectionOptions {
public:
enum Type {
CON_OP_INVALID,
CON_OP_SECURE,
CON_OP_UNSECURE,
CON_OP_BOTH,
};
ConnectionOptions(Type in_type, int in_port, int in_sport,
const HostAuthOptions& in_host_auth,
const std::string& in_ciphers)
: type (in_type)
, unsecure_port (in_port)
, secure_port (in_sport)
, host_auth (in_host_auth)
, ciphers (in_ciphers)
{
}
virtual ~ConnectionOptions() {}
bool allow_secure() const
{
return (type == CON_OP_BOTH || type == CON_OP_SECURE) && secure_port != -1;
}
bool allow_unsecure() const
{
return (type == CON_OP_BOTH || type == CON_OP_UNSECURE) && unsecure_port != -1;
}
public:
Type type;
int unsecure_port;
int secure_port;
HostAuthOptions host_auth; // for secure connection
std::string ciphers;
};
void connect_unsecure(const char* host, int port);
void connect_secure(const ConnectionOptions& options, const char* host);
void disconnect();
void swap(RedPeer* other);
void close();
void enable() { _shut = false;}
virtual CompundInMessage* recive();
uint32_t send(OutMessage& message);
uint32_t recive(uint8_t* buf, uint32_t size);
uint32_t send(uint8_t* buf, uint32_t size);
protected:
virtual void on_event() {}
virtual int get_socket() { return _peer;}
static bool x509_cert_host_name_compare(const char *cert_name, int cert_name_size,
const char *host_name);
static bool verify_pubkey(X509* cert, const HostAuthOptions::PublicKey& key);
static bool verify_host_name(X509* cert, const char* host_name);
static bool verify_subject(X509* cert, const HostAuthOptions::CertFieldValueList& subject);
static int ssl_verify_callback(int preverify_ok, X509_STORE_CTX *ctx);
private:
void shutdown();
void cleanup();
private:
SOCKET _peer;
Mutex _lock;
bool _shut;
uint64_t _serial;
SSL_CTX *_ctx;
SSL *_ssl;
};
class RedPeer::InMessage {
public:
InMessage(uint16_t type, uint32_t size, uint8_t * data)
: _type (type)
, _size (size)
, _data (data)
{
}
virtual ~InMessage() {}
uint16_t type() { return _type;}
uint8_t* data() { return _data;}
virtual uint32_t size() { return _size;}
protected:
uint16_t _type;
uint32_t _size;
uint8_t* _data;
};
class RedPeer::CompundInMessage: public RedPeer::InMessage {
public:
CompundInMessage(uint64_t _serial, uint16_t type, uint32_t size, uint32_t sub_list)
: InMessage(type, size, new uint8_t[size])
, _refs (1)
, _serial (_serial)
, _sub_list (sub_list)
{
}
RedPeer::InMessage* ref() { _refs++; return this;}
void unref() {if (!--_refs) delete this;}
uint64_t serial() { return _serial;}
uint32_t sub_list() { return _sub_list;}
virtual uint32_t size() { return _sub_list ? _sub_list : _size;}
uint32_t compund_size() {return _size;}
protected:
virtual ~CompundInMessage() { delete[] _data;}
private:
int _refs;
uint64_t _serial;
uint32_t _sub_list;
};
class RedPeer::OutMessage {
public:
OutMessage(uint32_t type, uint32_t size);
virtual ~OutMessage();
SpiceDataHeader& header() { return *(SpiceDataHeader *)_data;}
uint8_t* data() { return _data + sizeof(SpiceDataHeader);}
void resize(uint32_t size);
private:
uint32_t message_size() { return header().size + sizeof(SpiceDataHeader);}
uint8_t* base() { return _data;}
private:
uint8_t* _data;
uint32_t _size;
friend class RedPeer;
friend class RedChannel;
};
#endif
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