506 lines
14 KiB
ObjectPascal
506 lines
14 KiB
ObjectPascal
Program BT;
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{$I M_OPS.PAS}
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Uses
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cryptoldold,
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m_DateTime,
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m_FileIO,
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m_Strings,
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m_IO_Sockets,
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m_Protocol_Queue;
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Const
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M_NUL = 0;
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M_ADR = 1;
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M_PWD = 2;
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M_FILE = 3;
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M_OK = 4;
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M_EOB = 5;
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M_GOT = 6;
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M_ERR = 7;
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M_BSY = 8;
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M_GET = 9;
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M_SKIP = 10;
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M_DATA = 255;
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BinkPMaxBufferSize = 30 * 1024;
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BinkPTimeOut = 3000;
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BinkPUseCRAMMD5 = True;
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TempFileTime = 1363944820;
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InboundPath : String = 'd:\dev\code\mystic\dls\';
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Const
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BinkCmdStr : Array[0..10] of String[4] = (
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'NUL ',
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'ADR ',
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'PWD ',
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'FILE',
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'OK ',
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'EOB ',
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'GOT ',
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'ERR ',
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'BSY ',
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'GET ',
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'SKIP'
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);
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Type
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TBinkAuthState = (
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SendChallenge,
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SendWelcome,
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SendAddress,
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SendPassword,
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WaitAddress,
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WaitPassword,
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WaitPwdOK,
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AuthOK,
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AuthFailed
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);
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TBinkRxState = (
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RxNone,
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RxWaitFile,
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RxGetData,
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RxDone
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);
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TBinkTxState = (
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TxNone,
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TxNextFile,
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TxSendData,
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TxGetEOF,
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TxDone
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);
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TBinkFrameType = (
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Command,
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Data
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);
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TBinkP = Class
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Client : TIOSocket;
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IsClient : Boolean;
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UseMD5 : Boolean;
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AuthState : TBinkAuthState;
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TimeOut : LongInt;
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TxState : TBinkTxState;
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RxState : TBinkRxState;
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RxFrameType : TBinkFrameType;
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RxCommand : Byte;
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RxBuffer : Array[1..BinkPMaxBufferSize] of Char;
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RxBufSize : LongInt;
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HaveHeader : Boolean;
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NeedHeader : Boolean;
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MD5Challenge : String;
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FileList : TProtocolQueue;
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Constructor Create (Var C: TIOSocket; Var FL: TProtocolQueue; IsCli, MD5: Boolean);
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Destructor Destroy; Override;
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Function GetDataStr : String;
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Procedure SendFrame (CmdType: Byte; CmdData: String);
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Procedure SendDataFrame (Var Buf; BufSize: Word);
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Procedure DoFrameCheck;
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Function DoAuthentication : Boolean;
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Procedure DoTransfers;
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End;
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Function GetStateStr (S: TBinkAuthState) : String;
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Begin
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Case S of
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SendChallenge : Result := 'SendChallenge';
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SendWelcome : Result := 'SendWelcome';
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SendAddress : Result := 'SendAddress';
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SendPassword : Result := 'SendPassword';
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WaitAddress : Result := 'WaitAddress';
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WaitPassword : Result := 'WaitPassword';
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WaitPwdOK : Result := 'WaitPwdOK';
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AuthOK : Result := 'AuthOK';
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AuthFailed : Result := 'AuthFailed';
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Else
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Result := 'Unknown';
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End;
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End;
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Constructor TBinkP.Create (Var C: TIOSocket; Var FL: TProtocolQueue; IsCli, MD5: Boolean);
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Begin
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Inherited Create;
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Client := C;
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FileList := FL;
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IsClient := IsCli;
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UseMD5 := MD5;
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RxBufSize := 0;
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RxState := RxNone;
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TxState := TxNone;
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TimeOut := TimerSet(BinkPTimeout);
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NeedHeader := True;
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HaveHeader := False;
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MD5Challenge := '';
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AuthState := SendWelcome;
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If Not IsClient and UseMD5 Then
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AuthState := SendChallenge;
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End;
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Destructor TBinkP.Destroy;
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Begin
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Inherited Destroy;
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End;
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Function TBinkP.GetDataStr : String;
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Var
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SZ : Byte;
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Begin
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If RxBufSize > 255 Then
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SZ := 255
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Else
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SZ := RxBufSize;
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Move (RxBuffer[1], Result[1], SZ);
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Result[0] := Char(SZ);
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End;
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Procedure TBinkP.SendFrame (CmdType: Byte; CmdData: String);
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Var
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DataSize : Word;
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Begin
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DataSize := (Length(CmdData) + 2) OR $8000;
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Client.BufWriteStr(Char(Hi(DataSize)) + Char(Lo(DataSize)) + Char(CmdType) + CmdData + #0);
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Client.BufFlush;
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WriteLn ('Put Command Frame (', BinkCmdStr[CmdType], ') Data: ', CmdData);
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End;
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Procedure TBinkP.SendDataFrame (Var Buf; BufSize: Word);
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Var
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SendData : Array[1.. BinkPMaxBufferSize] of Char Absolute Buf;
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HiChar : Char;
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LoChar : Char;
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Begin
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HiChar := Char(Hi(BufSize));
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LoChar := Char(Lo(BufSize));
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Client.BufFlush;
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Client.WriteBuf (HiChar, 1);
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Client.WriteBuf (LoChar, 1);
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Client.WriteBuf (SendData[1], BufSize);
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TimeOut := TimerSet(BinkPTimeOut);
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// WriteLn ('Put Data Frame (', BufSize, ')');
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End;
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Procedure TBinkP.DoFrameCheck;
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Var
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CharHi : Char;
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CharLo : Char;
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InPos : LongInt;
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Begin
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If NeedHeader And Not HaveHeader And Client.DataWaiting Then Begin
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Client.ReadBuf (CharHi, 1);
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Client.ReadBuf (CharLo, 1);
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RxBufSize := (Word(CharHi) SHL 8) + Word(CharLo);
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If Byte(CharHi) AND $80 = 0 Then Begin
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RxCommand := M_DATA;
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RxFrameType := Data;
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End Else Begin
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RxBufSize := (RxBufSize AND ($8000 - 1)) - 1;
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RxFrameType := Command;
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Client.ReadBuf (RxCommand, 1);
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End;
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If RxBufSize > 0 Then
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For InPos := 1 to RxBufSize Do
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Client.ReadBuf(RxBuffer[InPos], 1);
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If Client.Connected Then Begin
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TimeOut := TimerSet(BinkPTimeOut);
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NeedHeader := False;
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HaveHeader := True;
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End;
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Case RxFrameType of
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Command : WriteLn ('Got Command Frame (', BinkCmdStr[RxCommand], ') Data: ', GetDataStr);
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// Data : WriteLn ('Got Data Frame (Read ', InPos, ' of ', RxBufSize, ')');
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End;
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End;
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End;
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Function TBinkP.DoAuthentication;
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Var
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Str : String;
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Count : LongInt;
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Begin
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WriteLn ('Begin Authentication');
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Repeat
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DoFrameCheck;
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If Not Client.Connected or (TimerUp(TimeOut)) Then
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AuthState := AuthFailed
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Else
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If HaveHeader and (RxCommand = M_NUL) Then Begin
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// Eat MNUL and get another header but steal MD5 challenge
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// and anything else we want to parse from OPTs, etc
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NeedHeader := True;
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HaveHeader := False;
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Str := GetDataStr;
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Count := Pos('MD5-', Str);
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If Count > 0 Then
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MD5Challenge := Copy(Str, Count + 4, 255);
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End;
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// WriteLn ('AuthState: ', GetStateStr(AuthState), ', HasHeader: ', HaveHeader, ' Data: ', GetDataStr);
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Case AuthState of
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SendChallenge : Begin // Send MD5 digest
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End;
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SendWelcome : Begin
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SendFrame (M_NUL, 'SYS Sector7');
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SendFrame (M_NUL, 'ZYZ g00r00');
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SendFrame (M_NUL, 'LOC Philadelphia, PA');
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SendFrame (M_NUL, 'VER Mystic/1.10 binkp/1.1');
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If IsClient Then
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AuthState := SendAddress
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Else
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AuthState := WaitAddress;
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End;
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SendAddress : Begin
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SendFrame (M_ADR, '55:268/212@mysticnet');
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AuthState := SendPassword;
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End;
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SendPassword : If HaveHeader Then Begin // wait for header to see if we support CRAMMD5
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If UseMD5 And (MD5Challenge <> '') Then Begin
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Str := 'password';
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MD5Challenge := StrHex(MD5Challenge);
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MD5Challenge := HexStr(HMAC_MD5(Str, MD5Challenge));
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SendFrame (M_PWD, 'CRAM-MD5-' + MD5Challenge);
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End Else
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// if forced CRAMMD5 then error and exit otherwise...
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SendFrame (M_PWD, 'password');
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Client.BufFlush;
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HaveHeader := False;
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NeedHeader := True;
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AuthState := WaitPwdOK;
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End;
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WaitAddress : Begin
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// get address
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AuthState := WaitPassword;
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End;
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WaitPassword : ;
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WaitPwdOK : If HaveHeader Then Begin
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If RxCommand <> M_OK Then
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AuthState := AuthFailed
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Else
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AuthState := AuthOK;
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End;
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End;
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Until (AuthState = AuthOK) or (AuthState = AuthFailed);
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Result := AuthState = AuthOK;
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End;
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Procedure TBinkP.DoTransfers;
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Var
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InFile : File;
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OutFile : File;
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OutSize : LongInt;
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OutBuf : Array[1..BinkPMaxBufferSize] of Byte;
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Str : String;
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InFN : String;
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InSize : Cardinal;
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InPos : Cardinal;
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InTime : Cardinal;
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FSize : Cardinal;
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Begin
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WriteLn ('Begin File Transfers');
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RxState := RxWaitFile;
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TxState := TxNextFile;
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TimeOut := TimerSet(BinkPTimeOut);
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NeedHeader := True;
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HaveHeader := False;
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Repeat
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DoFrameCheck;
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// need to update states to handle getting FILE during an xfer
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// and what to do if the file frame goes past file size (fail/quit), etc
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// waitms(100);
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// writeln ('rxstate=', ord(rxstate), ' txstate=', ord(txstate), ' have header ', haveheader, ' need header ', needheader);
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Case RxState of
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RxWaitFile : If HaveHeader Then Begin
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If RxFrameType = Data Then Begin
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HaveHeader := False;
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NeedHeader := True;
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Continue;
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End;
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If RxCommand = M_FILE Then Begin
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HaveHeader := False;
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NeedHeader := True;
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// translate filename, fix up file times
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Str := GetDataStr;
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InFN := strWordGet(1, Str, ' ');
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InSize := strS2I(strWordGet(2, Str, ' '));
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InTime := strS2I(strWordGet(3, Str, ' '));
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InPos := strS2I(strWordGet(4, Str, ' '));
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If FileExist(InBoundPath + InFN) Then Begin
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FSize := FileByteSize(InBoundPath + InFN);
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// fix timestamp and escape filen
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If FSize >= InSize Then Begin
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SendFrame (M_SKIP, InFN + ' ' + strI2S(FSize) + ' ' + strI2S(TempFileTime));
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Continue;
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End Else Begin
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SendFrame (M_GET, InFN + ' ' + strI2S(FSize) + ' ' + strI2S(TempFileTime));
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InPos := FSize;
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End;
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End;
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Assign (InFile, InBoundPath + InFN);
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Reset (InFile, 1);
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If IoResult <> 0 Then ReWrite (InFile, 1);
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Seek (InFile, InPos);
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RxState := RxGetData;
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End Else
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If RxCommand = M_EOB Then Begin
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NeedHeader := True;
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HaveHeader := False;
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RxState := RxDone;
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End;
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End;
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RxGetData : If HaveHeader And (RxFrameType = Data) Then Begin
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BlockWrite (InFile, RxBuffer[1], RxBufSize);
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Inc (InPos, RxBufSize);
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HaveHeader := False;
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NeedHeader := True;
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If InPos = InSize Then Begin
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// fix time, escape filename
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Close (InFile);
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SendFrame (M_GOT, InFN + ' ' + strI2S(InSize) + ' ' + strI2S(TempFileTime));
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RxState := RxWaitFile;
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End;
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End;
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End;
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// DoFrameCheck;
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Case TxState of
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TxGetEOF : Begin
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If HaveHeader Then
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If RxCommand = M_GOT Then Begin
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HaveHeader := False;
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NeedHeader := True;
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TxState := TxNextFile;
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End;
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End;
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TxNextFile : If FileList.Next Then Begin
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Assign (OutFile, FileList.QData[FileList.QPos].FilePath + FileList.QData[FileList.QPos].FileName);
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Reset (OutFile, 1);
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If IoResult <> 0 Then Continue;
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// need to escape filename here and fix file time
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SendFrame (M_FILE, FileList.QData[FileList.QPos].FileName + ' ' + strI2S(FileList.QData[FileList.QPos].FileSize) + ' ' + strI2S(TempFileTime) + ' 0');
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TxState := TxSendData;
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End Else Begin
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SendFrame (M_EOB, '');
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TxState := TxDone;
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End;
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TxSendData : Begin
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If HaveHeader And (RxCommand = M_GET) Then Begin
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Str := strWordGet(4, GetDataStr, ' ');
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Seek (OutFile, strS2I(Str));
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// fix file time and escape filename
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SendFrame (M_FILE, FileList.QData[FileList.QPos].FileName + ' ' + Str + ' 0 0');
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HaveHeader := False;
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NeedHeader := True;
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Continue;
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End;
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BlockRead (OutFile, OutBuf, SizeOf(OutBuf), OutSize);
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SendDataFrame (OutBuf, OutSize);
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If OutSize < SizeOf(OutBuf) Then Begin
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Close (OutFile);
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TxState := TxGetEOF;
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HaveHeader := False;
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NeedHeader := True;
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End;
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End;
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End;
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Until ((RxState = RxDone) and (TxState = TxDone)) or (Not Client.Connected) or (TimerUp(TimeOut));
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If Client.Connected Then Client.BufFlush;
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End;
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Var
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BinkP : TBinkP;
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Client : TIOSocket;
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Queue : TProtocolQueue;
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Begin
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Queue := TProtocolQueue.Create;
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Client := TIOSocket.Create;
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Client.FTelnetClient := False;
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Client.FTelnetServer := False;
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Queue.Add('d:\s7\echomail\inbound\t\', '0019ff33.mo0');
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Queue.Add('d:\s7\echomail\inbound\t\', '0019ff33.mo1');
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Queue.Add('d:\s7\echomail\inbound\t\', '0019ff33.mo2');
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BinkP := TBinkP.Create(Client, Queue, True, False);
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Client.Connect ('localhost', 24554);
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If BinkP.DoAuthentication Then
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BinkP.DoTransfers;
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BinkP.Free;
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Client.Free;
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Queue.Free;
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End.
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