winscp/core/SecureShell.h

//---------------------------------------------------------------------------
#ifndef SecureShellH
#define SecureShellH

#include "Interface.h"
#include "Configuration.h"
#include "Exceptions.h"
#include "SessionData.h"
#include "FileSystems.h"
#define SSH_ERROR(x) throw ESsh(NULL, x)
#define SSH_FATAL_ERROR_EXT(E, x) throw ESshFatal(E, x)
#define SSH_FATAL_ERROR(x) SSH_FATAL_ERROR_EXT(NULL, x)

#define sshClosed 0
#define sshInitWinSock 1
#define sshLookupHost 2
#define sshConnect 3
#define sshAuthenticate 4
#define sshAuthenticated 5
#define sshStartup 6
#define sshOpenDirectory 7
#define sshReady 8
//---------------------------------------------------------------------------
class TSecureShell;
class TConfiguration;
enum TCompressionType { ctNone, ctZLib };
//---------------------------------------------------------------------------
typedef void __fastcall (__closure *TQueryUserEvent)
  (TObject* Sender, const AnsiString Query, TStrings * MoreMessages, int Answers,
   const TQueryParams * Params, int & Answer, TQueryType QueryType, void * Arg);
typedef void __fastcall (__closure *TPromptUserEvent)
  (TSecureShell * SecureShell, AnsiString Prompt, TPromptKind Kind,
   AnsiString & Response, bool & Result, void * Arg);
typedef void __fastcall (__closure *TDisplayBannerEvent)
  (TSecureShell * SecureShell, AnsiString SessionName, const AnsiString & Banner,
   bool & NeverShowAgain);
typedef void __fastcall (__closure *TExtendedExceptionEvent)
  (TSecureShell * SecureShell, Exception * E, void * Arg);
//---------------------------------------------------------------------------
typedef Set<TLogLineType, llOutput, llException> TLogLineTypes;
extern const TColor LogLineColors[];
//---------------------------------------------------------------------------
class TSessionLog : public TStringList
{
private:
  TSecureShell * FOwner;
  TConfiguration * FConfiguration;
  bool FEnabled;
  void * FFile;
  AnsiString FFileName;
  Integer FLoggedLines;
  TLogAddLineEvent FOnAddLine;
  Integer FTopIndex;
  unsigned int FId;
  void __fastcall SetLine(Integer Index, AnsiString value);
  AnsiString __fastcall GetLine(Integer Index);
  void __fastcall SetType(Integer Index, TLogLineType value);
  TLogLineType __fastcall GetType(Integer Index);
  void DeleteUnnecessary();
  void OpenLogFile();
  TColor __fastcall GetColor(Integer Index);
  void __fastcall DoAddLine(TLogLineType Type, const AnsiString AddedLine);
  Integer __fastcall GetBottomIndex();
  Integer __fastcall GetIndexes(Integer Index);
  AnsiString __fastcall GetLogFileName();
  Boolean __fastcall GetLoggingToFile();
  Boolean __fastcall GetLogToFile();
  void __fastcall SetEnabled(bool value);
  void __fastcall SetConfiguration(TConfiguration * value);
  AnsiString __fastcall GetSessionName();
  void __fastcall DoAdd(TLogLineType aType, AnsiString aLine);

public:
  __fastcall TSessionLog(TSecureShell * AOwner);
  __fastcall ~TSessionLog();
  HIDESBASE void __fastcall Add(TLogLineType aType, AnsiString aLine);
  void __fastcall AddStartupInfo();
  void __fastcall AddException(Exception * E);
  void __fastcall AddSeparator();
  void __fastcall AddFromOtherLog(TObject * Sender, TLogLineType aType, 
    const AnsiString AddedLine);
  virtual void __fastcall Clear();
  void __fastcall ReflectSettings();
  bool __fastcall inline IsLogging()
  {
    return Enabled && (Configuration->Logging || (OnAddLine != NULL));
  }

  __property Integer BottomIndex = { read = GetBottomIndex };
  __property AnsiString Line[Integer Index]  = { read=GetLine, write=SetLine };
  __property TLogLineType Type[Integer Index]  = { read=GetType, write=SetType };
  __property TColor Color[Integer Index]  = { read=GetColor };
  __property TConfiguration * Configuration = { read = FConfiguration, write = SetConfiguration };
  __property OnChange;
  __property bool Enabled = { read = FEnabled, write = SetEnabled };
  __property Integer Indexes[Integer Index] = { read = GetIndexes };
  __property AnsiString LogFileName = { read = GetLogFileName };
  __property Integer LoggedLines = { read = FLoggedLines };
  __property Boolean LoggingToFile = { read = GetLoggingToFile };
  __property TLogAddLineEvent OnAddLine = { read = FOnAddLine, write = FOnAddLine };
  __property Integer TopIndex = { read = FTopIndex };
  __property AnsiString SessionName = { read = GetSessionName };
  __property unsigned int Id = { read = FId, write = FId };
protected:
  void __fastcall CloseLogFile();
  __property Boolean LogToFile = { read = GetLogToFile };
};
//---------------------------------------------------------------------------
#ifndef PuttyIntfH
struct Backend;
struct Config;
#endif
//---------------------------------------------------------------------------
class TSecureShell : public TObject
{
private:
  bool FStoredPasswordTried;
  bool FStoredPasswordTriedForKI;
  void * FSocket;
  TSessionData * FSessionData;
  bool FActive;
  __int64 FBytesReceived;
  __int64 FBytesSent;
  AnsiString FRealHost;
  TDateTime FLastDataSent;
  TQueryUserEvent FOnQueryUser;
  TPromptUserEvent FOnPromptUser;
  TDisplayBannerEvent FOnDisplayBanner;
  TExtendedExceptionEvent FOnShowExtendedException;
  Backend * FBackend;
  void * FBackendHandle;
  const unsigned int * FMaxPacketSize;
  int FBufSize;
  Config * FConfig;
  AnsiString FSshVersionString;
  AnsiString FPassword;
  AnsiString FHostKeyFingerprint;
  TLogAddLineEvent FOnStdError;

  unsigned PendLen;
  unsigned PendSize;
  unsigned OutLen;
  char * OutPtr;
  char * Pending;
  TSessionLog * FLog;
  TConfiguration *FConfiguration;
  TDateTime FLoginTime;
  TNotifyEvent FOnUpdateStatus;
  TNotifyEvent FOnClose;
  int FStatus;
  int FReachedStatus;
  AnsiString FStdErrorTemp;
  AnsiString FAuthenticationLog;
  TObject * FUserObject;

  TCipher FCSCipher;
  TCipher FSCCipher;

  TCipher __fastcall FuncToSsh1Cipher(const void * Cipher) const;
  TCipher __fastcall FuncToSsh2Cipher(const void * Cipher) const;
  TCompressionType __fastcall FuncToCompression(const void * Compress) const;
  void __fastcall Init();
  void __fastcall SetActive(bool value);
  bool __fastcall GetActive() const;
  TCipher __fastcall GetCSCipher();
  TCompressionType __fastcall GetCSCompression() const;
  TDateTime __fastcall GetDuration() const;
  TCipher __fastcall GetSCCipher();
  TCompressionType __fastcall GetSCCompression() const;
  int __fastcall GetSshVersion() const;
  int __fastcall GetStatus() const;
  void inline __fastcall CheckConnection(int Message = -1);
  void __fastcall WaitForData(bool Sending);
  void __fastcall SetLog(TSessionLog * value);
  void __fastcall SetConfiguration(TConfiguration * value);
  void __fastcall SetUserObject(TObject * value);
  void __fastcall Discard();
  AnsiString __fastcall GetSshImplementation();
  AnsiString __fastcall GetPassword();
  bool __fastcall Select(int Sec);
  void __fastcall PoolForData(unsigned int & Result);
  TDateTime __fastcall GetIdleInterval();
  bool __fastcall GetStoredPasswordTried();
  inline void __fastcall CaptureOutput(TLogLineType Type, const AnsiString & Line);

protected:
  AnsiString StdError;
  TLogAddLineEvent FOnCaptureOutput;

  void __fastcall Error(const AnsiString Error) const;
  virtual void __fastcall UpdateStatus(int Value);
  bool __fastcall SshFallbackCmd() const;
  void __fastcall GotHostKey();
  unsigned long __fastcall MaxPacketSize();
  int __fastcall RemainingSendBuffer();
  virtual void __fastcall KeepAlive();
  virtual void __fastcall SetSessionData(TSessionData * value);
  virtual void __fastcall DoDisplayBanner(const AnsiString & Banner);

public:
  __fastcall TSecureShell();
  __fastcall ~TSecureShell();
  virtual void __fastcall Open();
  virtual void __fastcall Close();
  bool __fastcall PromptUser(const AnsiString Prompt, AnsiString & Response,
    bool IsPassword);
  int __fastcall Receive(char * Buf, int Len);
  AnsiString __fastcall ReceiveLine();
  void __fastcall Send(const char * Buf, int Len);
  void __fastcall SendStr(AnsiString Str);
  void __fastcall SendSpecial(int Code);
  void __fastcall AddStdError(AnsiString Str);
  void __fastcall AddStdErrorLine(const AnsiString Str);
  void __fastcall ClearStdError();
  virtual void __fastcall Idle();
  void __fastcall SendEOF();
  void __fastcall SendLine(AnsiString Line);
  void __fastcall FatalError(Exception * E, AnsiString Msg);
  void __fastcall SendNull();
  void __fastcall SetSocket(void * value);

  void __fastcall FatalError(AnsiString Error);
  void __fastcall FromBackend(bool IsStdErr, char * Data, int Length);
  void __fastcall VerifyHostKey(const AnsiString Host, int Port,
    const AnsiString KeyType, const AnsiString KeyStr, const AnsiString Fingerprint);
  void __fastcall AskAlg(const AnsiString AlgType, const AnsiString AlgName);
  void __fastcall DisplayBanner(const AnsiString & Banner);
  void __fastcall OldKeyfileWarning();

  virtual int __fastcall DoQueryUser(const AnsiString Query, TStrings * MoreMessages,
    int Answers, const TQueryParams * Params, TQueryType Type = qtConfirmation);
  int __fastcall DoQueryUser(const AnsiString Query, const AnsiString OtherMessage,
    int Answers, const TQueryParams * Params, TQueryType Type);
  int __fastcall DoQueryUser(const AnsiString Query, int Answers,
    const TQueryParams * Params, TQueryType Type = qtConfirmation);
  int __fastcall DoQueryUser(const AnsiString Query, Exception * E,
    int Answers, const TQueryParams * Params, TQueryType Type);
  virtual void __fastcall DoShowExtendedException(Exception * E);
  void __fastcall DoHandleExtendedException(Exception * E);
  virtual bool __fastcall DoPromptUser(AnsiString Prompt, TPromptKind Kind,
    AnsiString & Response);

  bool __fastcall inline IsLogging()
  {
    return Log->IsLogging();
  }
  void __fastcall PuttyLogEvent(const AnsiString & Str);
  void __fastcall inline LogEvent(const AnsiString & Str)
  {
    if (IsLogging()) Log->Add(llMessage, Str);
  }

  __property TSessionData * SessionData = { read = FSessionData, write = SetSessionData };
  __property bool Active = { read = GetActive, write = SetActive };
  __property __int64 BytesReceived = { read = FBytesReceived };
  __property __int64 BytesSent = { read = FBytesSent };
  __property AnsiString RealHost = { read = FRealHost };
  __property TSessionLog * Log  = { read=FLog, write=SetLog };
  __property TConfiguration * Configuration  = { read=FConfiguration, write=SetConfiguration };
  __property TCipher CSCipher = { read = GetCSCipher };
  __property TCompressionType CSCompression = { read = GetCSCompression };
  __property TDateTime Duration = { read = GetDuration };
  __property TDateTime LoginTime = { read = FLoginTime };
  __property TCipher SCCipher = { read = GetSCCipher };
  __property TCompressionType SCCompression = { read = GetSCCompression };
  __property int SshVersion = { read = GetSshVersion };
  __property AnsiString SshVersionString = { read = FSshVersionString };
  __property AnsiString SshImplementation = { read = GetSshImplementation };
  __property AnsiString HostKeyFingerprint = { read = FHostKeyFingerprint };
  __property TQueryUserEvent OnQueryUser = { read = FOnQueryUser, write = FOnQueryUser };
  __property TPromptUserEvent OnPromptUser = { read = FOnPromptUser, write = FOnPromptUser };
  __property TDisplayBannerEvent OnDisplayBanner = { read = FOnDisplayBanner, write = FOnDisplayBanner };
  __property TExtendedExceptionEvent OnShowExtendedException = { read = FOnShowExtendedException, write = FOnShowExtendedException };
  __property TNotifyEvent OnUpdateStatus = { read = FOnUpdateStatus, write = FOnUpdateStatus };
  __property TLogAddLineEvent OnStdError = { read = FOnStdError, write = FOnStdError };
  __property TNotifyEvent OnClose = { read = FOnClose, write = FOnClose };
  __property int Status = { read = GetStatus };
  __property TObject * UserObject = { read = FUserObject, write = SetUserObject };
  __property AnsiString Password = { read = GetPassword };
  __property TDateTime IdleInterval = { read = GetIdleInterval };
  __property bool StoredPasswordTried = { read = GetStoredPasswordTried };
};
//---------------------------------------------------------------------------
#endif