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/*
* Copyright (c) 2010-2014 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#pragma once
#include <Swiften/Base/boost_bsignals.h>
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <Swiften/Base/API.h>
#include <Swiften/Base/Error.h>
#include <Swiften/Session/SessionStream.h>
#include <string>
#include <Swiften/JID/JID.h>
#include <Swiften/Elements/ToplevelElement.h>
#include <Swiften/StreamManagement/StanzaAckRequester.h>
#include <Swiften/StreamManagement/StanzaAckResponder.h>
namespace Swift {
class ClientAuthenticator;
class CertificateTrustChecker;
class IDNConverter;
class CryptoProvider;
class SWIFTEN_API ClientSession : public boost::enable_shared_from_this<ClientSession> {
public:
enum State {
Initial,
WaitingForStreamStart,
Negotiating,
Compressing,
WaitingForEncrypt,
Encrypting,
WaitingForCredentials,
Authenticating,
EnablingSessionManagement,
BindingResource,
StartingSession,
Initialized,
Finishing,
Finished
};
struct Error : public Swift::Error {
enum Type {
AuthenticationFailedError,
CompressionFailedError,
ServerVerificationFailedError,
NoSupportedAuthMechanismsError,
UnexpectedElementError,
ResourceBindError,
SessionStartError,
TLSClientCertificateError,
TLSError,
StreamError
} type;
Error(Type type) : type(type) {}
};
enum UseTLS {
NeverUseTLS,
UseTLSWhenAvailable,
RequireTLS
};
~ClientSession();
static boost::shared_ptr<ClientSession> create(const JID& jid, boost::shared_ptr<SessionStream> stream, IDNConverter* idnConverter, CryptoProvider* crypto) {
return boost::shared_ptr<ClientSession>(new ClientSession(jid, stream, idnConverter, crypto));
}
State getState() const {
return state;
}
void setAllowPLAINOverNonTLS(bool b) {
allowPLAINOverNonTLS = b;
}
void setUseStreamCompression(bool b) {
useStreamCompression = b;
}
void setUseTLS(UseTLS b) {
useTLS = b;
}
void setUseAcks(bool b) {
useAcks = b;
}
bool getStreamManagementEnabled() const {
// Explicitly convert to bool. In C++11, it would be cleaner to
// compare to nullptr.
return static_cast<bool>(stanzaAckRequester_);
}
bool getRosterVersioningSupported() const {
return rosterVersioningSupported;
}
std::vector<Certificate::ref> getPeerCertificateChain() const {
return stream->getPeerCertificateChain();
}
const JID& getLocalJID() const {
return localJID;
}
void start();
void finish();
bool isFinished() const {
return getState() == Finished;
}
void sendCredentials(const SafeByteArray& password);
void sendStanza(boost::shared_ptr<Stanza>);
void setCertificateTrustChecker(CertificateTrustChecker* checker) {
certificateTrustChecker = checker;
}
public:
boost::signal<void ()> onNeedCredentials;
boost::signal<void ()> onInitialized;
boost::signal<void (boost::shared_ptr<Swift::Error>)> onFinished;
boost::signal<void (boost::shared_ptr<Stanza>)> onStanzaReceived;
boost::signal<void (boost::shared_ptr<Stanza>)> onStanzaAcked;
private:
ClientSession(
const JID& jid,
boost::shared_ptr<SessionStream>,
IDNConverter* idnConverter,
CryptoProvider* crypto);
void finishSession(Error::Type error);
void finishSession(boost::shared_ptr<Swift::Error> error);
JID getRemoteJID() const {
return JID("", localJID.getDomain());
}
void sendStreamHeader();
void handleElement(boost::shared_ptr<ToplevelElement>);
void handleStreamStart(const ProtocolHeader&);
void handleStreamClosed(boost::shared_ptr<Swift::Error>);
void handleTLSEncrypted();
bool checkState(State);
void continueSessionInitialization();
void requestAck();
void handleStanzaAcked(boost::shared_ptr<Stanza> stanza);
void ack(unsigned int handledStanzasCount);
void continueAfterTLSEncrypted();
void checkTrustOrFinish(const std::vector<Certificate::ref>& certificateChain, boost::shared_ptr<CertificateVerificationError> error);
private:
JID localJID;
State state;
boost::shared_ptr<SessionStream> stream;
IDNConverter* idnConverter;
CryptoProvider* crypto;
bool allowPLAINOverNonTLS;
bool useStreamCompression;
UseTLS useTLS;
bool useAcks;
bool needSessionStart;
bool needResourceBind;
bool needAcking;
bool rosterVersioningSupported;
ClientAuthenticator* authenticator;
boost::shared_ptr<StanzaAckRequester> stanzaAckRequester_;
boost::shared_ptr<StanzaAckResponder> stanzaAckResponder_;
boost::shared_ptr<Swift::Error> error_;
CertificateTrustChecker* certificateTrustChecker;
};
}
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Swift