📄 edcode.pas
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unit EDcode;
interface
uses
Windows, SysUtils, {Classes, Hutil32,} Grobal2;
const
OLDMODE = 0; //老版本编码
NEWMODE = 1; //新版本编码
ENDECODEMODE = OLDMODE;
function EncodeMessage (smsg: TDefaultMessage): string;
function DecodeMessage (str: string): TDefaultMessage;
function EncodeString (str: string): string;
function DecodeString (str: string): string;
function EncodeBuffer (buf: pChar; bufsize: integer): string;
procedure DecodeBuffer (src: string; buf: PChar; bufsize: integer);
procedure Decode6BitBuf (sSource: PChar; pBuf: PChar; nSrcLen,nBufLen: integer);
procedure Encode6BitBuf (pSrc, pDest: PChar; nSrcLen, nDestLen: integer);
function MakeDefaultMsg(wIdent: Word;nRecog: Integer; wParam, wTag, wSeries: Word):TDefaultMessage;
function CSDecode(pIn: string; pOut: pChar; Size: word): word;
function CSEncode(pIn: pChar; pOut: pChar; Size: word): word;
function myDecode(pIn: string; pOut: pChar; Size: word): word;
function myEncode(pIn: pChar; pOut: pChar; Size: word): word;
function myEncodeString (str: string): string;
function myDecodeString (str: string): string;
function myMulencodeString (str: string;n:integer): string;
function myMuldecodeString (str: string;n:integer): string;
//var
// CSEncode: TRTLCriticalSection;
implementation
var
n4CEEF4 :Integer = $408D4D;
n4CEEF8 :Integer = $0C08BA52E;
w4CEF00 :Word = $8D34;
DecodeBitMasks:array[0..255] of Byte = (
$2A, $E7, $18, $6F, $63, $9D, $48, $EA, $39, $CD, $38, $B8, $A0, $AB, $E0, $10,
$35, $99, $37, $09, $C0, $69, $B2, $A4, $67, $88, $50, $34, $7F, $FC, $0B, $BE,
$0C, $44, $59, $B6, $5B, $9C, $65, $D6, $94, $EB, $C4, $3B, $03, $3C, $C9, $3E,
$6B, $9A, $D4, $F6, $C3, $4D, $11, $24, $AA, $FF, $4A, $ED, $95, $93, $D9, $46,
$5F, $96, $87, $30, $BA, $CA, $CB, $FA, $8A, $1A, $68, $5C, $AC, $07, $40, $60,
$29, $70, $57, $53, $41, $12, $DE, $1D, $64, $14, $97, $72, $FB, $8D, $2B, $08,
$CF, $F4, $3A, $00, $C5, $91, $56, $A9, $9E, $71, $BC, $A3, $AF, $A6, $55, $DA,
$79, $BB, $33, $A5, $25, $15, $7D, $EE, $C1, $2C, $C7, $D0, $19, $D8, $5A, $E8,
$85, $FD, $2F, $6A, $78, $45, $DB, $B5, $F5, $1E, $04, $75, $B0, $7A, $20, $F2,
$DF, $D3, $83, $F3, $54, $90, $A2, $C6, $0F, $80, $36, $4E, $C8, $01, $82, $76,
$A1, $2E, $84, $86, $0E, $47, $8F, $E1, $F9, $7C, $C2, $74, $DC, $26, $22, $CE,
$2D, $4F, $BF, $0D, $73, $27, $21, $B3, $98, $1F, $89, $EC, $FE, $52, $0A, $8C,
$9F, $A8, $E5, $E6, $06, $8B, $CC, $F7, $5E, $E3, $7B, $D2, $05, $49, $13, $E9,
$66, $B7, $AD, $B4, $F8, $A7, $1C, $F1, $02, $7E, $6E, $17, $62, $4C, $77, $8E,
$DD, $F0, $43, $28, $6D, $61, $B9, $D7, $BD, $3D, $9B, $92, $16, $EF, $51, $23,
$E2, $B1, $81, $31, $32, $58, $D1, $5D, $D5, $6C, $4B, $E4, $AE, $42, $1B, $3F
);
n4CEEFC :Integer = $408D97;
EncodeBitMasks:array[0..255] of Byte = (
$8C, $87, $0D, $85, $D4, $64, $63, $E5, $BA, $7E, $B8, $68, $9D, $9F, $F5, $BC,
$A0, $E3, $3A, $22, $19, $21, $39, $78, $EE, $27, $36, $15, $74, $C7, $97, $C9,
$CE, $E2, $7B, $4C, $98, $A1, $C2, $59, $41, $C0, $1E, $2E, $95, $EB, $DE, $69,
$1D, $5B, $53, $DA, $F4, $0A, $4F, $BB, $B7, $24, $33, $0F, $C8, $84, $29, $89,
$3C, $1C, $08, $49, $C6, $FE, $CC, $23, $3E, $E1, $4E, $8B, $13, $E7, $1A, $5D,
$CF, $B1, $47, $8F, $D8, $72, $4B, $93, $6E, $73, $4D, $94, $DD, $82, $14, $A7,
$03, $F9, $F1, $C5, $8D, $79, $2A, $C4, $DC, $60, $5F, $D7, $62, $B5, $E9, $B3,
$B6, $12, $A8, $32, $D9, $C3, $6A, $75, $4A, $A2, $0C, $26, $91, $5A, $AD, $6D,
$44, $10, $B4, $46, $1B, $66, $81, $20, $FD, $7F, $88, $25, $9C, $71, $D3, $E6,
$80, $E4, $FA, $42, $9B, $37, $01, $FC, $DB, $45, $6B, $FB, $56, $F0, $AF, $9A,
$BF, $AB, $D6, $CD, $02, $F2, $7C, $AA, $B2, $92, $FF, $57, $2F, $86, $A6, $7D,
$35, $17, $34, $D5, $0E, $65, $09, $05, $28, $CA, $48, $31, $8E, $2D, $DF, $52,
$F6, $1F, $A4, $50, $76, $40, $18, $04, $8A, $16, $2B, $AE, $43, $3F, $D0, $CB,
$6C, $55, $54, $96, $99, $30, $67, $5E, $2C, $AC, $E0, $7A, $E8, $58, $90, $BE,
$A5, $6F, $B0, $70, $EC, $61, $5C, $06, $3B, $77, $C1, $07, $EA, $A9, $F8, $11,
$BD, $F3, $00, $ED, $83, $EF, $3D, $A3, $51, $9E, $38, $F7, $0B, $B9, $D2, $D1
);
//var
// EncBuf,TempBuf:PChar;
function MakeDefaultMsg(wIdent: Word;nRecog: Integer; wParam, wTag, wSeries: Word):TDefaultMessage;
begin
Result.Recog:=nRecog;
Result.Ident:=wIdent;
Result.Param:=wParam;
Result.Tag:=wTag;
Result.Series:=wSeries;
end;
{
procedure Encode6BitBuf (pSrc,pDest:PChar;nSrcLen,nDestLen: integer);
var
Proc:procedure (pSrc,pDest:PChar;nSrcLen,nDestLen: integer);
begin
Proc:=Pointer(g_Config.Encode6BitBuf);
Proc(pSrc,pDest,nSrcLen,nDestLen);
end;
}
function CSDecode(pIn: string; pOut: pChar; Size: word): word;
var b1, b2, b3: byte;
c1, c2, c3, c4: byte;
i, oPtr: word;
x, y: word;
begin
// i := 0;
oPtr := 0;
x := Length(pIn) div 4;
if Length(pIn) > 3 then
for i := 0 to x - 1 do begin
c1 := ord(pIn[i * 4 + 1]) - $3B;
c2 := ord(pIn[i * 4 + 2]) - $3B;
c3 := ord(pIn[i * 4 + 3]) - $3B;
c4 := ord(pIn[i * 4 + 4]) - $3B;
b1 := (c1 and $FC) shl 2; //11111100->11110000
b2 := (c1 and 3); //00000011
b3 := c4 and $C; //00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $EB);
inc(oPtr);
b1 := (c2 and $FC) shl 2; //11111100->11110000
b2 := (c2 and 3); //00000011
b3 := (c4 and 3) shl 2; //00000011 ->00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $EB);
inc(oPtr);
b1 := (c4 and $30) shl 2; //00110000->11000000
pOut[oPtr] := chr((c3 or b1) xor $EB);
inc(oPtr);
end;
y := Length(pIn) mod 4;
if y = 2 then begin
c1 := ord(pIn[x * 4 + 1]) - $3B;
c2 := ord(pIn[x * 4 + 2]) - $3B;
b1 := (c1 and $FC) shl 2; //11111100->11110000
b2 := (c1 and 3); //00000011
b3 := (c2 and 3) shl 2; //00000011->00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $EB);
inc(oPtr);
end;
if y = 3 then begin
c1 := ord(pIn[x * 4 + 1]) - $3B;
c2 := ord(pIn[x * 4 + 2]) - $3B;
c4 := ord(pIn[x * 4 + 3]) - $3B;
b1 := (c1 and $FC) shl 2; //11111100->11110000
b2 := (c1 and 3); //00000011
b3 := c4 and $C; //00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $EB);
inc(oPtr);
b1 := (c2 and $FC) shl 2; //11111100->11110000
b2 := (c2 and 3); //00000011
b3 := (c4 and 3) shl 2; //00000011 ->00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $EB);
inc(oPtr);
end;
pOut[oPtr]:=chr(0);
result := oPtr;
end;
//封包加密
function CSEncode(pIn: pChar; pOut: pChar; Size: word): word;
var b1, bcal: byte;
bflag1, bflag2: byte;
i, iPtr, oPtr: word;
begin
// b1 := 0;
// bcal := 0;
// bflag1 := 0;
bflag2 := 0;
i := 0;
iPtr := 0;
oPtr := 0;
while iPtr < Size do begin
b1 := ord(pIn[iPtr]) xor $EB;
inc(iPtr);
if i < 2 then begin
bcal := b1;
bcal := bcal shr 2;
bflag1 := bcal;
bcal := bcal and $3C;
b1 := b1 and 3;
bcal := bcal or b1;
bcal := bcal + $3B;
pOut[oPtr] := chr(bcal);
inc(oPtr);
bflag2 := (bflag1 and 3) or (bflag2 shl 2);
end
else begin
bcal := b1;
bcal := bcal and $3F;
bcal := bcal + $3B;
pOut[oPtr] := chr(bcal);
inc(oPtr);
b1 := b1 shr 2;
b1 := b1 and $30;
b1 := b1 or bflag2;
b1 := b1 + $3B;
pOut[oPtr] := chr(b1);
inc(oPtr);
bflag2 := 0;
end;
inc(i);
i := i mod 3;
end;
pOut[oPtr] := chr(0);
if i <> 0 then begin
pOut[oPtr] := chr(bflag2 + $3B);
inc(oPtr);
pOut[oPtr] := chr(0);
end;
result := oPtr;
end;
function myDecode(pIn: string; pOut: pChar; Size: word): word;
var b1, b2, b3: byte;
c1, c2, c3, c4: byte;
i, oPtr: word;
x, y: word;
begin
// i := 0;
oPtr := 0;
x := Length(pIn) div 4;
if Length(pIn) > 3 then
for i := 0 to x - 1 do begin
c1 := ord(pIn[i * 4 + 1]) - $2B;
c2 := ord(pIn[i * 4 + 2]) - $2B;
c3 := ord(pIn[i * 4 + 3]) - $2B;
c4 := ord(pIn[i * 4 + 4]) - $2B;
b1 := (c1 and $FC) shl 2; //11111100->11110000
b2 := (c1 and 3); //00000011
b3 := c4 and $C; //00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $BB);
inc(oPtr);
b1 := (c2 and $FC) shl 2; //11111100->11110000
b2 := (c2 and 3); //00000011
b3 := (c4 and 3) shl 2; //00000011 ->00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $BB);
inc(oPtr);
b1 := (c4 and $30) shl 2; //00110000->11000000
pOut[oPtr] := chr((c3 or b1) xor $BB);
inc(oPtr);
end;
y := Length(pIn) mod 4;
if y = 2 then begin
c1 := ord(pIn[x * 4 + 1]) - $2B;
c2 := ord(pIn[x * 4 + 2]) - $2B;
b1 := (c1 and $FC) shl 2; //11111100->11110000
b2 := (c1 and 3); //00000011
b3 := (c2 and 3) shl 2; //00000011->00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $BB);
inc(oPtr);
end;
if y = 3 then begin
c1 := ord(pIn[x * 4 + 1]) - $2B;
c2 := ord(pIn[x * 4 + 2]) - $2B;
c4 := ord(pIn[x * 4 + 3]) - $2B;
b1 := (c1 and $FC) shl 2; //11111100->11110000
b2 := (c1 and 3); //00000011
b3 := c4 and $C; //00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $BB);
inc(oPtr);
b1 := (c2 and $FC) shl 2; //11111100->11110000
b2 := (c2 and 3); //00000011
b3 := (c4 and 3) shl 2; //00000011 ->00001100
pOut[oPtr] := chr((b1 or b2 or b3) xor $BB);
inc(oPtr);
end;
pOut[oPtr]:=chr(0);
result := oPtr;
end;
//封包加密
function myEncode(pIn: pChar; pOut: pChar; Size: word): word;
var b1, bcal: byte;
bflag1, bflag2: byte;
i, iPtr, oPtr: word;
begin
// b1 := 0;
// bcal := 0;
// bflag1 := 0;
bflag2 := 0;
i := 0;
iPtr := 0;
oPtr := 0;
while iPtr < Size do begin
b1 := ord(pIn[iPtr]) xor $BB;
inc(iPtr);
if i < 2 then begin
bcal := b1;
bcal := bcal shr 2;
bflag1 := bcal;
bcal := bcal and $3C;
b1 := b1 and 3;
bcal := bcal or b1;
bcal := bcal + $2B;
pOut[oPtr] := chr(bcal);
inc(oPtr);
bflag2 := (bflag1 and 3) or (bflag2 shl 2);
end
else begin
bcal := b1;
bcal := bcal and $3F;
bcal := bcal + $2B;
pOut[oPtr] := chr(bcal);
inc(oPtr);
b1 := b1 shr 2;
b1 := b1 and $30;
b1 := b1 or bflag2;
b1 := b1 + $2B;
pOut[oPtr] := chr(b1);
inc(oPtr);
bflag2 := 0;
end;
inc(i);
i := i mod 3;
end;
pOut[oPtr] := chr(0);
if i <> 0 then begin
pOut[oPtr] := chr(bflag2 + $2B);
inc(oPtr);
pOut[oPtr] := chr(0);
end;
result := oPtr;
end;
// function CSEncode(pIn: pChar; pOut: pChar; Size: word): word;
procedure Encode6BitBuf (pSrc,pDest:PChar;nSrcLen,nDestLen: integer);
begin
CSEncode(pSrc, pDest,nSrcLen );
end;
procedure Encode6BitBufbak (pSrc,pDest:PChar;nSrcLen,nDestLen: integer);
var
I :Integer;
nRestCount :Integer;
nDestPos :Integer;
btMade :Byte;
btCh :Byte;
btRest :Byte;
begin
nRestCount:=0;
btRest:= 0;
nDestPos:= 0;
for i:= 0 to nSrcLen - 1 do begin
if nDestPos >= nDestLen then break;
btCh:=Byte(pSrc[i]);
{$IF ENDECODEMODE = NEWMODE}
btCh:=(EncodeBitMasks[btCh] xor n4CEEFC) xor n4CEEF4;
btCh:=btCh xor (HiByte(LoWord(n4CEEF8)) + LoByte(LoWord(n4CEEF8)));
{$IFEND}
btMade:=Byte((btRest or (btCh shr (2+ nRestCount))) and $3F);
btRest:=Byte(((btCh shl (8 - (2+ nRestCount))) shr 2) and $3F);
Inc (nRestCount,2);
if nRestCount < 6 then begin
pDest[nDestPos]:=Char(btMade + $3C);
Inc(nDestPos);
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