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5精币
function EncrypStr(Src, Key: string): string; //字符串加密函数
//对字符串加密(Src:源 Key:密匙)
var
KeyLen: Integer;
KeyPos: Integer;
offset: Integer;
dest: string;
SrcPos: Integer;
SrcAsc: Integer;
Range: Integer;
begin
KeyLen := Length(Key);
if KeyLen = 0 then
Key := ('legendsoft');
KeyPos := 0;
Range := 256;
Randomize;
offset := Random(Range);
dest := Format('%1.2x', [offset]);
for SrcPos := 1 to Length(Src) do begin
SrcAsc := (Ord(Src[SrcPos]) + offset) mod 255;
if KeyPos < KeyLen then KeyPos := KeyPos + 1
else KeyPos := 1;
SrcAsc := SrcAsc xor Ord(Key[KeyPos]);
dest := dest + Format('%1.2x', [SrcAsc]);
offset := SrcAsc;
end;
Result := dest;
end;
function DecrypStr(Src, Key: string): string; //字符串解密函数
var
KeyLen: Integer;
KeyPos: Integer;
offset: Integer;
dest: string;
SrcPos: Integer;
SrcAsc: Integer;
TmpSrcAsc: Integer;
begin
KeyLen := Length(Key);
if KeyLen = 0 then Key := ('legendsoft');
KeyPos := 0;
offset := StrToInt('$' + Copy(Src, 1, 2));
SrcPos := 3;
repeat
SrcAsc := StrToInt('$' + Copy(Src, SrcPos, 2));
if KeyPos < KeyLen then KeyPos := KeyPos + 1
else KeyPos := 1;
TmpSrcAsc := SrcAsc xor Ord(Key[KeyPos]);
if TmpSrcAsc <= offset then TmpSrcAsc := 255 + TmpSrcAsc - offset
else TmpSrcAsc := TmpSrcAsc - offset;
dest := dest + Chr(TmpSrcAsc);
offset := SrcAsc;
SrcPos := SrcPos + 2;
until SrcPos >= Length(Src);
Result := dest;
end;
加密参数:
szParamStr := EncrypStr(Format('%s:%d', [ClientSocket.Address, ClientSocket.Port]), '');
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